CN117716829A - Method for changing stony desertification land into black land by using solid waste coal gangue phosphogypsum - Google Patents
Method for changing stony desertification land into black land by using solid waste coal gangue phosphogypsum Download PDFInfo
- Publication number
- CN117716829A CN117716829A CN202311389019.5A CN202311389019A CN117716829A CN 117716829 A CN117716829 A CN 117716829A CN 202311389019 A CN202311389019 A CN 202311389019A CN 117716829 A CN117716829 A CN 117716829A
- Authority
- CN
- China
- Prior art keywords
- phosphogypsum
- land
- black
- gangue
- soil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000003245 coal Substances 0.000 title claims abstract description 165
- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 title claims abstract description 114
- 238000000034 method Methods 0.000 title claims description 51
- 239000002910 solid waste Substances 0.000 title claims description 35
- 239000000463 material Substances 0.000 claims abstract description 255
- 239000002689 soil Substances 0.000 claims abstract description 214
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 49
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 48
- 241000196324 Embryophyta Species 0.000 claims abstract description 41
- 239000003864 humus Substances 0.000 claims abstract description 40
- 239000010871 livestock manure Substances 0.000 claims abstract description 33
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 31
- 239000011707 mineral Substances 0.000 claims abstract description 31
- 235000010755 mineral Nutrition 0.000 claims abstract description 31
- 239000000203 mixture Substances 0.000 claims abstract description 28
- 239000004567 concrete Substances 0.000 claims abstract description 26
- 239000012535 impurity Substances 0.000 claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000004568 cement Substances 0.000 claims abstract description 17
- 230000035558 fertility Effects 0.000 claims abstract description 17
- 238000000926 separation method Methods 0.000 claims abstract description 17
- 241000361919 Metaphire sieboldi Species 0.000 claims abstract description 13
- 239000004927 clay Substances 0.000 claims abstract description 11
- 239000010410 layer Substances 0.000 claims description 104
- 229910001385 heavy metal Inorganic materials 0.000 claims description 83
- 239000003795 chemical substances by application Substances 0.000 claims description 59
- 239000003337 fertilizer Substances 0.000 claims description 52
- 238000002156 mixing Methods 0.000 claims description 39
- 239000002699 waste material Substances 0.000 claims description 32
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 29
- 238000002360 preparation method Methods 0.000 claims description 25
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 22
- 229910052698 phosphorus Inorganic materials 0.000 claims description 22
- 239000011574 phosphorus Substances 0.000 claims description 22
- 239000002245 particle Substances 0.000 claims description 21
- 230000001580 bacterial effect Effects 0.000 claims description 20
- 239000003575 carbonaceous material Substances 0.000 claims description 19
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 18
- 239000000843 powder Substances 0.000 claims description 18
- 238000003756 stirring Methods 0.000 claims description 18
- 210000003608 fece Anatomy 0.000 claims description 17
- 150000002500 ions Chemical class 0.000 claims description 17
- 239000002893 slag Substances 0.000 claims description 17
- 239000011591 potassium Substances 0.000 claims description 16
- 229910052700 potassium Inorganic materials 0.000 claims description 16
- 229910001579 aluminosilicate mineral Inorganic materials 0.000 claims description 15
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 14
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 14
- 229910052791 calcium Inorganic materials 0.000 claims description 14
- 239000011575 calcium Substances 0.000 claims description 14
- 229910052748 manganese Inorganic materials 0.000 claims description 14
- 239000011572 manganese Substances 0.000 claims description 14
- 238000004519 manufacturing process Methods 0.000 claims description 14
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 claims description 14
- 229910052683 pyrite Inorganic materials 0.000 claims description 14
- 239000011028 pyrite Substances 0.000 claims description 14
- 239000004576 sand Substances 0.000 claims description 13
- 235000013601 eggs Nutrition 0.000 claims description 12
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 11
- 239000011777 magnesium Substances 0.000 claims description 11
- 229910052749 magnesium Inorganic materials 0.000 claims description 11
- 238000007711 solidification Methods 0.000 claims description 11
- 230000008023 solidification Effects 0.000 claims description 11
- 239000012190 activator Substances 0.000 claims description 10
- 241001233061 earthworms Species 0.000 claims description 10
- 244000005700 microbiome Species 0.000 claims description 10
- 238000001179 sorption measurement Methods 0.000 claims description 10
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 9
- 239000011229 interlayer Substances 0.000 claims description 9
- 238000005507 spraying Methods 0.000 claims description 9
- 239000004575 stone Substances 0.000 claims description 9
- 229910052717 sulfur Inorganic materials 0.000 claims description 9
- 239000011593 sulfur Substances 0.000 claims description 9
- 235000019738 Limestone Nutrition 0.000 claims description 8
- 229920002472 Starch Polymers 0.000 claims description 8
- AQLMHYSWFMLWBS-UHFFFAOYSA-N arsenite(1-) Chemical compound O[As](O)[O-] AQLMHYSWFMLWBS-UHFFFAOYSA-N 0.000 claims description 8
- 239000006028 limestone Substances 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 8
- 238000001953 recrystallisation Methods 0.000 claims description 8
- 230000000087 stabilizing effect Effects 0.000 claims description 8
- 239000008107 starch Substances 0.000 claims description 8
- 235000019698 starch Nutrition 0.000 claims description 8
- 239000007864 aqueous solution Substances 0.000 claims description 7
- 239000001913 cellulose Substances 0.000 claims description 7
- 229920002678 cellulose Polymers 0.000 claims description 7
- 244000061176 Nicotiana tabacum Species 0.000 claims description 6
- 235000002637 Nicotiana tabacum Nutrition 0.000 claims description 6
- 238000010521 absorption reaction Methods 0.000 claims description 6
- 230000032683 aging Effects 0.000 claims description 6
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical class O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 6
- 239000002068 microbial inoculum Substances 0.000 claims description 6
- 229920000178 Acrylic resin Polymers 0.000 claims description 5
- 239000004925 Acrylic resin Substances 0.000 claims description 5
- 240000006394 Sorghum bicolor Species 0.000 claims description 5
- 235000011684 Sorghum saccharatum Nutrition 0.000 claims description 5
- 239000011521 glass Substances 0.000 claims description 5
- 239000002028 Biomass Substances 0.000 claims description 4
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 claims description 4
- 244000144972 livestock Species 0.000 claims description 4
- 229910052901 montmorillonite Inorganic materials 0.000 claims description 4
- 239000000618 nitrogen fertilizer Substances 0.000 claims description 4
- 230000035699 permeability Effects 0.000 claims description 4
- 239000002686 phosphate fertilizer Substances 0.000 claims description 4
- 244000144977 poultry Species 0.000 claims description 4
- 239000012991 xanthate Substances 0.000 claims description 4
- 244000025254 Cannabis sativa Species 0.000 claims description 3
- 241000233866 Fungi Species 0.000 claims description 3
- 239000002250 absorbent Substances 0.000 claims description 3
- 230000002745 absorbent Effects 0.000 claims description 3
- 238000005261 decarburization Methods 0.000 claims description 3
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 3
- 239000000446 fuel Substances 0.000 claims description 3
- 238000010248 power generation Methods 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 229920002050 silicone resin Polymers 0.000 claims description 3
- LFQCEHFDDXELDD-UHFFFAOYSA-N tetramethyl orthosilicate Chemical compound CO[Si](OC)(OC)OC LFQCEHFDDXELDD-UHFFFAOYSA-N 0.000 claims description 3
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical compound CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 claims description 2
- 241001494508 Arundo donax Species 0.000 claims description 2
- 229920001661 Chitosan Polymers 0.000 claims description 2
- 108010068370 Glutens Proteins 0.000 claims description 2
- HTTJABKRGRZYRN-UHFFFAOYSA-N Heparin Chemical compound OC1C(NC(=O)C)C(O)OC(COS(O)(=O)=O)C1OC1C(OS(O)(=O)=O)C(O)C(OC2C(C(OS(O)(=O)=O)C(OC3C(C(O)C(O)C(O3)C(O)=O)OS(O)(=O)=O)C(CO)O2)NS(O)(=O)=O)C(C(O)=O)O1 HTTJABKRGRZYRN-UHFFFAOYSA-N 0.000 claims description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 2
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 2
- 244000057114 Sapium sebiferum Species 0.000 claims description 2
- 235000005128 Sapium sebiferum Nutrition 0.000 claims description 2
- 108010073771 Soybean Proteins Proteins 0.000 claims description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 2
- 239000003463 adsorbent Substances 0.000 claims description 2
- 235000010443 alginic acid Nutrition 0.000 claims description 2
- 239000000783 alginic acid Substances 0.000 claims description 2
- 229920000615 alginic acid Polymers 0.000 claims description 2
- 229960001126 alginic acid Drugs 0.000 claims description 2
- 150000004781 alginic acids Chemical class 0.000 claims description 2
- 229910000323 aluminium silicate Inorganic materials 0.000 claims description 2
- 239000002738 chelating agent Substances 0.000 claims description 2
- 229940045110 chitosan Drugs 0.000 claims description 2
- 239000012990 dithiocarbamate Substances 0.000 claims description 2
- 150000004659 dithiocarbamates Chemical class 0.000 claims description 2
- 239000000428 dust Substances 0.000 claims description 2
- ZOOODBUHSVUZEM-UHFFFAOYSA-N ethoxymethanedithioic acid Chemical compound CCOC(S)=S ZOOODBUHSVUZEM-UHFFFAOYSA-N 0.000 claims description 2
- 238000007667 floating Methods 0.000 claims description 2
- 229920000669 heparin Polymers 0.000 claims description 2
- 229960002897 heparin Drugs 0.000 claims description 2
- 229920000609 methyl cellulose Polymers 0.000 claims description 2
- 239000001923 methylcellulose Substances 0.000 claims description 2
- 235000010981 methylcellulose Nutrition 0.000 claims description 2
- 235000010987 pectin Nutrition 0.000 claims description 2
- 239000001814 pectin Substances 0.000 claims description 2
- 229920001277 pectin Polymers 0.000 claims description 2
- 229960000292 pectin Drugs 0.000 claims description 2
- 229920000058 polyacrylate Polymers 0.000 claims description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 2
- 229940072033 potash Drugs 0.000 claims description 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims description 2
- 235000015320 potassium carbonate Nutrition 0.000 claims description 2
- 239000011435 rock Substances 0.000 claims description 2
- 239000000661 sodium alginate Substances 0.000 claims description 2
- 235000010413 sodium alginate Nutrition 0.000 claims description 2
- 229940005550 sodium alginate Drugs 0.000 claims description 2
- 206010016807 Fluid retention Diseases 0.000 claims 3
- 229940001941 soy protein Drugs 0.000 claims 1
- 230000000813 microbial effect Effects 0.000 abstract description 14
- 238000005516 engineering process Methods 0.000 abstract description 11
- 230000004048 modification Effects 0.000 abstract description 9
- 238000012986 modification Methods 0.000 abstract description 9
- 239000013078 crystal Substances 0.000 abstract description 6
- 239000011573 trace mineral Substances 0.000 abstract description 6
- 235000013619 trace mineral Nutrition 0.000 abstract description 6
- 238000009423 ventilation Methods 0.000 abstract description 4
- 230000004913 activation Effects 0.000 abstract description 3
- 239000010440 gypsum Substances 0.000 abstract description 3
- 229910052602 gypsum Inorganic materials 0.000 abstract description 3
- 238000005188 flotation Methods 0.000 abstract 1
- 235000015097 nutrients Nutrition 0.000 description 17
- 239000002994 raw material Substances 0.000 description 15
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 14
- 238000005262 decarbonization Methods 0.000 description 10
- 239000011159 matrix material Substances 0.000 description 10
- 238000000855 fermentation Methods 0.000 description 9
- 230000004151 fermentation Effects 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 239000005416 organic matter Substances 0.000 description 8
- 239000000126 substance Substances 0.000 description 8
- 238000011282 treatment Methods 0.000 description 8
- 229910052757 nitrogen Inorganic materials 0.000 description 7
- 239000010802 sludge Substances 0.000 description 7
- 150000001875 compounds Chemical class 0.000 description 6
- 238000001035 drying Methods 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 230000006872 improvement Effects 0.000 description 5
- 239000004615 ingredient Substances 0.000 description 5
- 235000016709 nutrition Nutrition 0.000 description 5
- 230000008635 plant growth Effects 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 241000605222 Acidithiobacillus ferrooxidans Species 0.000 description 4
- 241001225321 Aspergillus fumigatus Species 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 229940091771 aspergillus fumigatus Drugs 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000005056 compaction Methods 0.000 description 4
- 239000002131 composite material Substances 0.000 description 4
- 238000000354 decomposition reaction Methods 0.000 description 4
- 238000006731 degradation reaction Methods 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 4
- 238000011049 filling Methods 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- QJZYHAIUNVAGQP-UHFFFAOYSA-N 3-nitrobicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid Chemical compound C1C2C=CC1C(C(=O)O)C2(C(O)=O)[N+]([O-])=O QJZYHAIUNVAGQP-UHFFFAOYSA-N 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 3
- 230000002378 acidificating effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000009264 composting Methods 0.000 description 3
- 239000012792 core layer Substances 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 239000004021 humic acid Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000002367 phosphate rock Substances 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000004083 survival effect Effects 0.000 description 3
- 241001645711 Bacillus mobilis Species 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 2
- 241000283690 Bos taurus Species 0.000 description 2
- 241000611330 Chryseobacterium Species 0.000 description 2
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 241001465754 Metazoa Species 0.000 description 2
- 229910019142 PO4 Inorganic materials 0.000 description 2
- 241001494479 Pecora Species 0.000 description 2
- 241000209046 Pennisetum Species 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 229960000892 attapulgite Drugs 0.000 description 2
- 239000011449 brick Substances 0.000 description 2
- 238000001354 calcination Methods 0.000 description 2
- 238000003763 carbonization Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 239000002361 compost Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 239000010881 fly ash Substances 0.000 description 2
- 125000000524 functional group Chemical group 0.000 description 2
- 238000005469 granulation Methods 0.000 description 2
- 230000003179 granulation Effects 0.000 description 2
- 239000003673 groundwater Substances 0.000 description 2
- 230000012010 growth Effects 0.000 description 2
- 230000003301 hydrolyzing effect Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 235000012054 meals Nutrition 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- 239000002366 mineral element Substances 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000035764 nutrition Effects 0.000 description 2
- 239000003895 organic fertilizer Substances 0.000 description 2
- 238000000643 oven drying Methods 0.000 description 2
- 229910052625 palygorskite Inorganic materials 0.000 description 2
- 239000010452 phosphate Substances 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 2
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 description 2
- 238000000197 pyrolysis Methods 0.000 description 2
- 238000002407 reforming Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 239000005995 Aluminium silicate Substances 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 239000005696 Diammonium phosphate Substances 0.000 description 1
- 229920002153 Hydroxypropyl cellulose Polymers 0.000 description 1
- 206010020880 Hypertrophy Diseases 0.000 description 1
- 241001134775 Lysinibacillus fusiformis Species 0.000 description 1
- 241000191938 Micrococcus luteus Species 0.000 description 1
- 208000025174 PANDAS Diseases 0.000 description 1
- 208000021155 Paediatric autoimmune neuropsychiatric disorders associated with streptococcal infection Diseases 0.000 description 1
- 240000000220 Panda oleosa Species 0.000 description 1
- 235000016496 Panda oleosa Nutrition 0.000 description 1
- 206010057249 Phagocytosis Diseases 0.000 description 1
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 description 1
- 241000122973 Stenotrophomonas maltophilia Species 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 244000269722 Thea sinensis Species 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 240000008042 Zea mays Species 0.000 description 1
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 description 1
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 238000012271 agricultural production Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 1
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 1
- 235000011130 ammonium sulphate Nutrition 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000000498 ball milling Methods 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000002374 bone meal Substances 0.000 description 1
- 229940036811 bone meal Drugs 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 229910052570 clay Inorganic materials 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 235000005822 corn Nutrition 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- SHFGJEQAOUMGJM-UHFFFAOYSA-N dialuminum dipotassium disodium dioxosilane iron(3+) oxocalcium oxomagnesium oxygen(2-) Chemical compound [O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[Na+].[Na+].[Al+3].[Al+3].[K+].[K+].[Fe+3].[Fe+3].O=[Mg].O=[Ca].O=[Si]=O SHFGJEQAOUMGJM-UHFFFAOYSA-N 0.000 description 1
- MNNHAPBLZZVQHP-UHFFFAOYSA-N diammonium hydrogen phosphate Chemical compound [NH4+].[NH4+].OP([O-])([O-])=O MNNHAPBLZZVQHP-UHFFFAOYSA-N 0.000 description 1
- 229910000388 diammonium phosphate Inorganic materials 0.000 description 1
- 235000019838 diammonium phosphate Nutrition 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 238000010494 dissociation reaction Methods 0.000 description 1
- 230000005593 dissociations Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009313 farming Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000002550 fecal effect Effects 0.000 description 1
- 239000011790 ferrous sulphate Substances 0.000 description 1
- 235000003891 ferrous sulphate Nutrition 0.000 description 1
- 230000004720 fertilization Effects 0.000 description 1
- 235000012041 food component Nutrition 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 230000002538 fungal effect Effects 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 238000001027 hydrothermal synthesis Methods 0.000 description 1
- 239000001863 hydroxypropyl cellulose Substances 0.000 description 1
- 235000010977 hydroxypropyl cellulose Nutrition 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 1
- 229910000359 iron(II) sulfate Inorganic materials 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 235000021049 nutrient content Nutrition 0.000 description 1
- 235000018343 nutrient deficiency Nutrition 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000010451 perlite Substances 0.000 description 1
- 235000019362 perlite Nutrition 0.000 description 1
- 230000008636 plant growth process Effects 0.000 description 1
- 229920003217 poly(methylsilsesquioxane) Polymers 0.000 description 1
- 239000012286 potassium permanganate Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 229910052711 selenium Inorganic materials 0.000 description 1
- 239000011669 selenium Substances 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000002881 soil fertilizer Substances 0.000 description 1
- 238000003900 soil pollution Methods 0.000 description 1
- 235000019710 soybean protein Nutrition 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000010902 straw Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
- 239000003760 tallow Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000009283 thermal hydrolysis Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 239000010455 vermiculite Substances 0.000 description 1
- 229910052902 vermiculite Inorganic materials 0.000 description 1
- 235000019354 vermiculite Nutrition 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
- 235000015099 wheat brans Nutrition 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Landscapes
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
Aiming at the ore forming condition of the coal gangue and the characteristics of mineral composition, phosphogypsum mineral crystal characteristics and mineral components adsorbed on gypsum crystals, the coal gangue is separated into a material A rich in carbon scraps and a material B which is rich in humus and contains a large amount of mineral trace elements by a mechanical separation impurity removal technology, the material A is recycled for a cement plant or a thermal power plant or a flotation plant, the material B which is natural and rich in humus and contains a large amount of mineral trace elements is converted into artificial black soil through water retention and ventilation modification, microbial modification of livestock manure, continuous activation modification of earthworm organisms and plant roots and the like, and the modified phosphogypsum and the shale which absorbs water and expands into clay are used for preparing greening concrete base layers and black soil layers, so that the stony desertification soil is effectively converted into high-quality black soil, and the soil fertility is continuously enhanced.
Description
Technical Field
The invention relates to a method for comprehensively utilizing solid waste coal gangue and phosphogypsum, in particular to a method for reforming stony desertification land into high-quality cultivated land black land by using solid waste coal gangue phosphogypsum as a main raw material.
Background
As is well known, most of agricultural and forestry farmland soil is weathered by aluminosilicate mineral shale on the surface of crust. The black soil which is known as panda in farmland is the soil with highest fertility, most suitable for farming and most production potential. Black soil does not refer to black soil, but refers to soil with a high content of humus, wherein the black color is derived from the black color of humus, and the soil is pure black due to the fact that the black soil contains a great amount of humus. The nature of the black soil is that a great deal of organic residues accumulated on a yellow soil layer formed by the original shale weathering penetrate each other to form a humus soil layer. The black soil is formed and is indistinguishable from specific climates and geological conditions, three black soil areas of the world are distributed around 47-degree lines of northern hemisphere north latitude, the soil forming conditions of the Dinnieber river, the Missiubi river and the Heilongjiang river are that the climate in summer is mild and moist, the climate in winter is severe and dry, the ground is not smooth to form upper layer water retention, the accumulation amount of organic matters exceeds the decomposition amount every year, plant residues can deposit humus throughout the year, the humus layer is thickened year by year due to the accumulation of a large amount of organic matters, and the humus black soil with the thickness of one centimeter can be formed only usually after hundreds of years, and the thickness of the black soil layer of three black soil areas of the world is about one meter on average (up to two meters) after the accumulation of humus of tens of thousands of years. The black soil has extremely high content of humus organic matters, contains a large amount of mineral elements such as nitrogen, phosphorus, potassium, magnesium and the like which are necessary for plant growth, has extremely high fertility, has good soil water retention and is favorable for plant absorption. After the black soil is reclaimed, the soil hydrothermal condition is changed, a stagnant water layer is eliminated to different degrees, the soil ventilation is improved, the heat absorption is improved, the microbial action is enhanced, the decomposition of organic matters is accelerated, the nutrient elements are more released, the soil effective fertility is improved, and the development of the soil curing process is faster.
At present, most cultivated lands in China have the soil fertility reduced beyond red lines, the organic matter content of the cultivated lands is reduced from 6.7% to about 1.8% on average, and the dry land is only about 1.2%, which is far lower than the level of 5% -8% of the organic matter content of European and American countries. The organic matters mainly containing humus in the soil are the basis of soil fertility, and the soil fertility is an important index for measuring the fertility degree of the soil and is a key factor for determining the high quality of agricultural production and sustainable utilization of soil resources. Progressive reduction of organic matter in cultivated land can even lead to land degradation (desertification, desertification and stony desertification). Today, the stony desertification phenomenon in partial areas of China is serious, and relates to a plurality of county cities in Yunnan, guizhou, guangxi, sichuan, hunan, hubei, chongqing and Guangdong eight provinces (autonomous region, direct jurisdiction), wherein the stony desertification phenomenon is mainly concentrated in the places such as Yunnan, guizhou, guangxi and the like; stony desertification is taken as a main expression form of land degradation, so that the production and life of people can be influenced from multiple aspects, the soil layer becomes thinner and thinner along with the degradation of vegetation and the reinforcement of stony desertification degree, the soil structure becomes worse gradually, the soil corrosion resistance becomes worse and the soil becomes barren more and more. These can directly lead to a serious consequence, namely that cultivated land is produced and the area of cultivated land is reduced, and meanwhile, water and soil loss causes various natural disasters, thereby bringing serious harm to the production and life of people.
On the other hand, coal is an indispensable basic fossil energy in China, and coal gangue is used as a bulk solid waste product of coal industry, and mainly consists of aluminosilicate mineral shale, carbonate rock, sandstone, carbon residue and the like according to different geological mineral conditions of a mining area, wherein the shale gangue accounts for over eight ingredients. Coal is known to be formed by slow reaction of plants under high-temperature and high-pressure geological conditions, but long neglected by people, in the process of forming coal by hot-pressing reaction of plants, most of humus in the coal is absorbed by aluminosilicate mineral shale to form black shale, most of free heavy metals and fluorine in the coal are adsorbed in pure coal carbon blocks by natural adsorption of carbon, or the coal is in the form of independent mineral crystals such as arsenite and phosphate stones, and the like, and according to long-term tracking and sampling analysis, about 81.33% of humus is present in the black shale in the coal forming process of shale mining areas, and the humus accounts for about 18.67% in the pure coal blocks; the harmful heavy metals such as lead, mercury, arsenic, chromium and the like are mainly adsorbed in pure coal blocks or exist in independent ores, the total heavy metal content is only 14.31% in the black shale on average, and the total heavy metal content of most shale gangue is within the standard safety range. Objectively, shale gangue is easy to weather and expand when meeting water, contains rich organic matters (mostly 15-36%) and various microelements such as nitrogen, phosphorus, potassium, zinc, copper, selenium, germanium and the like required by plant growth, has safe heavy metal content, belongs to clean waste residues after decarbonization and impurity removal, and is a purely natural potential high-quality black soil raw material formed underground.
Because the migration, permeation and adsorption effects of various compounds in the coal formation process and the cross-range of soil research of agriculture and forestry cultivated lands are ignored by people for a long time, the utilization effect of the mass solid waste resources of the coal gangue of which the China takes coal as a main energy source and is subjected to wind and cloud gushing for decades is quite unsatisfactory, and the existing various coal gangue resource utilization technical approaches are summarized as follows:
1. the gangue is used for preparing building materials, including gangue is used for cement raw material compounding, cement concrete admixture, brick making by mixing, ceramsite preparing, baking-free brick/plate preparing by adding cement, etc., and has the advantages of limited consumption, easy production process condition or product quality stability, and secondary pollution.
2. The technology of directly crushing the gangue to be used as roadbed/backfill material wastes valuable organic matter resources and clay resources, and has potential safety hazard because the shale gangue absorbs water to naturally expand and weathers.
3. The gangue is directly crushed and then used for blending coal, so that firstly valuable organic matter resources and clay resources are wasted, secondly the combustion performance and burnout rate of the coal are objectively reduced, and thirdly secondary pollution is increased.
4. The technology for extracting silicon and aluminum from coal gangue or extracting noble metal from kaolin has limited consumption, wastes valuable organic matter resources and clay resources, and increases energy consumption and produces serious secondary pollution.
5. The technology of preparing the compound fertilizer from the coal gangue is an advanced technology of the current world of the utilization of the coal gangue, and various technical researches are carried out on the preparation of the compound fertilizer from the coal gangue by scientific workers in various countries, such as: CN202211023638.8 relates to a method for preparing humic acid fertilizer by using coal gangue, which comprises the following steps: a. obtaining powdery gangue as a raw material for preparing humic acid fertilizer; b. b, obtaining thiobacillus ferrooxidans, diluting the thiobacillus ferrooxidans, then spraying the diluted thiobacillus ferrooxidans on the obtained powdery gangue in the step a, fully stirring and uniformly mixing the thiobacillus ferrooxidans, performing biological treatment, and completing primary fermentation treatment to form gangue mud; c. uniformly mixing the gangue mud formed in the step b with a specific fraction of ore source humic acid and biomass to form a mixed material; d. c, adding composite zymophyte powder into the mixed material obtained in the step c, stirring and mixing uniformly for a plurality of times, and then carrying out conventional solid fermentation treatment and finishing secondary fermentation. CN202110204747.9 discloses a gangue mineral fertilizer and a preparation method thereof. The fertilizer is prepared by using coal gangue as a raw material and treating the coal gangue with bacillus mobilis GZU-Bac 01. The bacillus mobilis GZU-Bac01 is utilized to dissociate and release insoluble phosphorus, potassium, calcium, nitrogen and other nutritional ingredients in the coal gangue, and the insoluble phosphorus, the quick-acting potassium, the exchangeable calcium, the hydrolyzed nitrogen and other nutritional ingredients can be absorbed by plants, so that the coal gangue is utilized as a resource. CN202010818225.3 provides a method for preparing microbial fertilizer from coal gangue, which takes coal gangue as raw material and is prepared by dissociating and treating with bacillus fusiformis GZU-Lys 01. CN202110989784.5 discloses a gangue microorganism fungus fertilizer and its preparation method, the fertilizer component comprises or is the product obtained by treating raw materials with aspergillus fumigatus GZT-Asp 01; the main component of the raw material is coal gangue or coal gangue; the method for treating the raw materials by using aspergillus fumigatus GZT-Asp01 comprises the following steps: crushing raw materials, and preparing aspergillus fumigatus GZT-Asp01 into bacterial liquid; spraying the bacterial liquid on the crushed raw materials under continuous stirring, uniformly stirring, turning over at regular time, controlling temperature, treating and airing to obtain the product. The microbial fungal fertilizer for the coal gangue uses aspergillus fumigatus GZT-Asp01 to treat the coal gangue, so that insoluble components such as phosphorus, potassium, calcium, nitrogen and the like in the coal gangue can be effectively converted into nutritional components which can be absorbed by plants such as effective phosphorus, quick-acting potassium, exchangeable calcium, hydrolytic nitrogen and the like, and the recycling of the coal gangue is realized. CN201910098876.7 discloses a method for preparing microbial fertilizer by using gangue as raw material, which is to use gangue as basic raw material, mix low grade phosphorite and kalium ore, dissociate with chrysobacterium GZU-Ch01 to prepare microbial fertilizer, and dissociate gangue with chrysobacterium GZU-Ch01 to release useful nutrition. CN201910806578.9 discloses a method for preparing microbial mineral fertilizer from coal gangue, which takes coal gangue as raw material and is prepared by dissociation of stenotrophomonas maltophilia GZU-Stm 01. CN201910098301.5 the invention discloses a method for preparing microbial fertilizer, which takes gangue as basic raw material, is doped with low-grade phosphorite and kalium mine, and is prepared into microbial fertilizer after being dissociated by micrococcus luteus GZU-Mi 02. A method for preparing a silicon fertilizer by activating coal gangue by using CN202210746002.X, comprising the following steps: crushing coal gangue and organic solid waste respectively to obtain coal gangue powder and organic solid waste powder; mixing gangue powder and organic solid waste powder to obtain a mixture; the mixture is subjected to pyrolysis treatment, calcination and stabilization in sequence to obtain an activated material; and quenching and crushing the activated materials in sequence to obtain the silicon fertilizer. CN202310759814.2 discloses a gangue fertilizer for improving soil nutrient content and its preparation method, which converts gangue into soil fertilizer containing multiple nutrient elements through crushing and screening, heating, drying, decarbonization and other steps, wherein the decarbonization of gangue is realized through heating, the content of SiO2 and a12O3 in chemical components of gangue is more than 80%, the crushing and screening select gangue particles with diameter smaller than 1mm, the heating temperature is 300-800 ℃, the heating time is 30 minutes to 2 hours, the drying temperature is 80-120 ℃, the drying time is 2 hours to 6 hours, the decarbonization temperature is 600-900 ℃, and the decarbonization time is 30 minutes to 1 hour. CN202210151862.9 is prepared by crushing coal gangue with microorganism, first-stage crushing, oven drying, ball milling, sieving with 0.05mm sieve, adding strain and starter solution into pit fermenting tank, aerobic fermenting, fermenting to release carbon, phosphorus, potassium, silicon, calcium and magnesium nutrients in coal gangue, mixing uniformly, adding decomposed cattle and sheep feces, mixing 70% coal gangue and 30% cattle and sheep feces according to weight percentage into balls, adding strain for secondary fermentation, and oven drying. CN201911390984.8 discloses a preparation method of an ecological improvement matrix based on gangue and sludge, the gangue is crushed, the sludge is subjected to composting treatment, fly ash and a growth-promoting microbial agent resistant to heavy metals are added, and the mixture is mixed and placed for 2 weeks to obtain the cured ecological improvement matrix. The addition of the sludge compost can release inert nutrients in the coal gangue, the microbial agent can control the risks of heavy metals in the sludge and the coal gangue, physical and chemical properties and microbial indexes of the matrix are improved and improved after the coal gangue and the sludge compost are mixed, an ecological improvement matrix similar to soil is formed, the growth of plants is promoted, and finally the recycling utilization of the coal gangue and the sludge is realized. CN202211631712.4, disclose a comprehensive utilization method of coal gangue, comprising the following steps: step one: crushing coal gangue for the first time; step two: crushing the coal gangue fragments again; step three: spraying the diluted biological microbial inoculum on coal gangue particles, and carrying out primary fermentation on the coal gangue particles to prepare a mixture A; step four: adding animal manure, animal bone meal, straw, urea, green grass, leaves, fly ash and composite zymocyte powder into a reaction container according to a proportion, stirring and mixing the mixture uniformly, and standing the mixture for secondary fermentation to prepare a mixture B; step five: drying; step six: balling; step seven: and drying. CN201510442511.3 discloses a production method of coal gangue carbonized nutrient soil, which adopts the technical scheme that ingredients of the coal gangue carbonized nutrient soil are stirred and extruded into sheet-shaped particles, carbonized into the coal gangue carbonized nutrient soil, and then the ingredients of the coal gangue carbonized nutrient soil are granulated, sterilized and packaged into the coal gangue carbonized nutrient soil. The gangue carbonized nutrient soil consists of gangue, activated clay waste residue, attapulgite clay, bentonite, zeolite, crushed waste, waste after retting, vermiculite, diammonium phosphate, perlite, ferrous sulfate and super absorbent resin. The coal gangue carbonized nutrient soil contains a large amount of nitrogen, phosphorus, potassium, organic matters and trace elements, is high-quality nutrient soil with complete nutrition components, high fertilizer efficiency, no toxicity, no bacteria, no harm, no odor and good water retention performance, is suitable for planting flowers and seedlings, and the production method of the coal gangue carbonized nutrient soil is suitable for producing carbonized nutrient soil and nutrient matrixes. CN202210247639.4 is a modified gangue bio-organic fertilizer, and a preparation method and application thereof, wherein the modified gangue bio-organic fertilizer is prepared from the following components in parts by weight: 80-120 parts of modified coal gangue, 20-30 parts of wheat bran, 20-30 parts of corn meal, 12-18 parts of tea bran, 12-18 parts of cotton seed meal, 8-14 parts of attapulgite and 26-36 parts of composite microbial inoculum; the nutritional elements contained in the gangue can be fully released through calcining and modifying the gangue, and the calcined gangue can also be used as a carrier for adsorption of beneficial bacteria. CN202211253441.3 discloses a preparation method of a matrix coal gangue and a seedling substrate based on the coal gangue, the preparation of the matrix coal gangue comprises the following steps: crushing coal gangue to obtain coal gangue particles, and mixing the coal gangue particles with different particle sizes according to a certain proportion; mixing biomass and water, adding the mixture into a high-pressure hydrothermal reaction kettle for hydrothermal carbonization reaction, and carrying out solid-liquid separation to obtain solid hydrothermal carbon and a hydrothermal solution; and fully mixing the gangue mixed particles, the hydrothermal carbon and the soil to prepare the matrix gangue. Mixing the obtained gangue matrix with a hydrothermal carbonization solution and a small amount of chemical fertilizer to obtain a seedling matrix. The invention fully utilizes organic matters, oxygen-containing functional groups and nitrogen-containing functional groups on the surface of the solid hydrothermal carbon, thereby achieving the purposes of improving the matrix nutrient and the water retention rate of the coal gangue and passivating heavy metals. CN202210048662.0 discloses a preparation method and product of gangue compound fertilizer, the preparation steps are: dissolving an acidic phosphate fertilizer, an acidic nitrogen fertilizer and potassium permanganate in water, and adding gangue particles to obtain a mixture; and heating the obtained mixture by microwaves, and removing water to obtain the gangue compound fertilizer. CN201310526978.7 discloses a water-retaining slow-release fertilizer material based on gangue hollow spheres and a preparation method thereof. The novel water-retaining slow-release fertilizer material based on the coal gangue hollow sphere consists of a coal gangue hollow sphere shell layer and a fertilizer core layer. The shell layer is coal gangue micron-sized hollow spheres or coal gangue micron-sized hollow spheres coated with organic coating materials on the surfaces, and the core layer consists of chemical fertilizer materials or composite materials containing chemical fertilizer and water retention materials. The material of the core layer is firstly dissolved in water and is loaded in the hollow cavity of the coal gangue hollow sphere through vacuum, ultrasonic or pressurized impregnation. Then the organic coating material is covered outside the gangue hollow sphere to seal the porous structure of the shell layer, thereby increasing the slow release effect. From the above and the prior patents, the prior coal gangue fertilizer preparation technology and method are mainly treated by fermentation composting, microbial decomposition or combustion, pyrolysis, thermal hydrolysis and other main technologies. Firstly, long periods are needed for fermentation composting, secondary fermentation, microbial decomposition fertilizer preparation and the like of the coal gangue, the fertilizer preparation cost is high, the consumption is small, and the popularization is difficult; secondly, the coal gangue fertilizer is prepared by burning, pyrolyzing, thermally hydrolyzing and the like, and the coal gangue fertilizer is ground and is treated by additional heat energy, so that the energy consumption is extremely high, and the method is not beneficial to large-scale industrialized treatment; thirdly, the hypertrophy of the gangue has a defect on the treatment of heavy metals in the gangue or generates long-term negative influence on plant growth. 6. The simple technology of filling and covering the vegetation with soil, namely, surrounding dams, filling the gangue, and then covering soil on the surface for greening plants is a mode commonly adopted by each coal mine under the environmental protection requirement in recent years, the basic operation mode is that the coal mine is characterized by the farmland, and is generally the farmland or mountain ditches for the nearby levering, surrounding dams are built, the gangue is piled up, most of the people are invited to fill the soil and the soil at the price of 30 yuan/ton of the gangue, and then plants on the soil. The successful experience of piling up the covered soil plants of the coal gangue mountain by surrounding the dam in farmland for collecting the water from the coal mine in Guizhou is fully confirmed in safety and environmental engineering (Vol.30 No.3 May 2023) in the pilot test study of the greening of the artificial soil making and the soil making of the coal gangue mountain. The technical method is simple and feasible, meets the existing environmental protection greening requirements, occupies the existing cultivated land firstly, wastes a large amount of organic matter resources and clay resources which can be expensive, namely wastes a large amount of black soil resources naturally formed in the underground, and is easy to cause the pollution of underground water and soil.
Indeed, to date, billions of tons of high content humic shale gangue and phosphogypsum, also a large number of mineral elements required for plant growth, are still jeopardizing the atmospheric environment and groundwater and soil resources without effectively treating land stockpiling or simple earth covering landfills each year. In the face of the prior land degradation in China, the organic humus in the soil is reduced year by year, the land is gradually barren and stony desertification is serious, and a large amount of shale gangue 'black soil' resources which are naturally formed in tens of thousands of years or are simply covered with soil and landfill are piled up, so that a breakthrough brand new technical thought technical method is urgently needed.
Secondly, in the cloud precious jaw sites with serious stony desertification, phosphogypsum is a large amount of solid waste as a by-product of the phosphorus chemical industry, the yield is high, the comprehensive utilization rate is low, the occupied storage capacity is hundreds of millions of tons, and because phosphogypsum contains unreacted complete phosphate rock and water-soluble phosphorus and is acidic, a certain amount of heavy metal ions are adsorbed on mineral crystals of the phosphogypsum, so that serious water and soil pollution events are caused, and the development of the phosphorus industry is restricted to a certain extent. The existing comprehensive utilization technical methods of phosphogypsum mainly comprise cement retarder, building gypsum, granular ammonium sulfate, sulfuric acid, soil improvement materials, agricultural compound fertilizer, mine backfill, roadbed materials and the like, the technical methods either have limited absorption of phosphogypsum or are easy to generate potential safety hazards or secondary pollution, in order to solve the problem that phosphogypsum treatment is difficult to influence the development of the phosphorus chemical industry, governments and phosphorus chemical enterprises have to go out of a table for supporting policies, how to eliminate heavy metal harm in phosphogypsum, and utilize elements such as phosphorus, sulfur, fluorine, calcium, magnesium, potassium and the like in phosphogypsum while utilizing the recrystallization solidification characteristics of phosphogypsum, and a brand new technical path is also needed.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects of the prior art and providing a method for reforming stony desertification land into black land by using solid wastes such as coal gangue, phosphogypsum and the like.
The technical scheme adopted for solving the technical problems is as follows: a method for changing stony desertification land into black land by utilizing solid waste coal gangue and phosphogypsum, comprising the following steps:
(1) Pretreatment of solid waste
1) Pretreatment of coal gangue: according to the characteristics that carbon is difficult to biodegrade into organic humus, carbon has natural adsorption characteristics on heavy metals, heavy metals in coal are adsorbed in crystalline block granular coal or are present in block ores, the coal gangue is mechanically separated and pre-separated into a material A (namely carbonaceous scrap material obtained by decarburization) and a material B1 (namely shale gangue material containing block granular humus and selecting and removing visible block harmful minerals such as pyrite, arsenite and the like, which can be called as 'raw black soil'), wherein the material A (carbonaceous material) is a coal gangue enriched carbonaceous material, and contains most of small granular carbon scraps and most of heavy metal impurities naturally adsorbed by the coal carbon; the B1 material (original black soil) is coal gangue pre-separation impurity removal, namely, most of carbon particles which are difficult to degrade and have no actual fertilizer efficiency are removed, and the content of heavy metals possibly existing is reduced to the maximum extent, so that cleaner shale gangue containing humus aluminosilicate minerals is obtained; crushing the material B1 to 1 um-1 mm 10-70%, 1 mm-5 mm 10-50% and 5 mm-20 mm 10-50% by using a crushing machine to obtain raw black soil, wherein the code name is B2;
The material A generated by pre-separating the gangue is an enriched mineral mixture containing a large amount of carbon dust aluminosilicate, and can be directly supplied or modified to be processed into energy-saving slag powder, and then is supplied to a cement clinker production line for comprehensive utilization of resources and saving of materials of coal, or is supplied to a thermal power plant for fuel power generation, or is used for floating carbon; limestone and sandstone aggregates generated by pre-separation and impurity removal can be used for producing building sandstone; pyrite and the like generated by pre-separation and impurity removal can be used as special ore materials;
2) The phosphogypsum pretreatment is modified phosphogypsum: uniformly mixing phosphogypsum and a heavy metal curing agent by stirring machinery according to the mass ratio of 100:1-15 to obtain modified phosphogypsum, wherein the code name is C1 material; or uniformly mixing phosphogypsum, cement and a heavy metal curing agent according to the mass ratio of 100:5-20:1-15 to obtain modified phosphogypsum, wherein the code name is C2 material; when the C1 material or the C2 material is not completely cured, the material can be used as a cementing material; after the C1 material or the C2 material is completely solidified and granulated, the sand material can be used as the sand material with potential biological fertilizer efficiency;
3) Preparing a bacterial agent for livestock manure waste: naturally aging and fermenting livestock and poultry manure waste for more than seven days, and taking the livestock and poultry manure waste as a fattening microorganism bacterial introducing agent, wherein the code name is D material;
4) Preparation of the bio-phagocytic activator: the prepared healthy earthworms or the faeces soil containing the earthworms eggs are named as E material;
(2) Setting a stony desertification ground bottom layer (also called as a base layer ")" greening concrete "layer:
the method comprises the steps of taking a raw black soil B1 material (shale gangue) capable of expanding after water absorption as aggregate, taking a modified phosphogypsum C2 material which is not completely solidified as a cementing and solidifying material, mixing the materials according to a mass ratio of B1 material to C2 material of 30-70:70-30, paving the materials on a stony desertification land, compacting the materials with a thickness of 200-2000 mm to form a modified phosphogypsum shale gangue layer, and naming the modified phosphogypsum shale gangue layer as a greening concrete layer to form a stabilizing layer for changing the stony desertification land into the black soil; the solidification and recrystallization characteristics of the modified phosphogypsum not only meet the requirement of stable permeation resistance of the bottom layer of the stony desertification land, but also ensure that the plant root system can grab phosphorus, sulfur, calcium, magnesium, potassium and other elements in the phosphogypsum, and can fully extend into the longitudinal stone seam interlayer below;
(3) Creating a stony desertification land black soil layer: uniformly mixing raw black soil B2 material, solidified and granulated modified phosphogypsum C1 material or C2 material, livestock manure waste microbial inoculum D material and earthworm egg-containing manure E material according to the mass ratio of 100:10-50:0.5-35:0.05-5 by using a stirring machine, paving the mixture on a greening concrete layer arranged in the step (2) to form a black soil layer with the thickness of 500-5000 mm, and then spraying a water-retaining dust-proof agent to ensure that the moisture content of the black soil layer reaches 10-30% by mass to form a biochemical black soil layer; if the E material of the bio-phagocytic activator is directly earthworms, the E material earthworms can be intermittently introduced into the black soil to bio-phagocytize and activate the black soil after laying the black soil layer;
(4) Continuously curing the black soil by the plants: and (3) planting economic crops capable of improving soil structure and fertility on the stony desertification land black soil layer created in the step (3), and continuously curing the black soil. Thus, the yield benefit can be obtained rapidly, and the plant biological biochemical activation curing black soil layer can be sustained.
Further, in the step (1), the heavy metal ion curing agent is a commercially available aqueous solution of water-containing glass and/or meta-aluminate, methyl silicate, water-soluble silicone resin and/or acrylic resin.
Further, in the step (3), in the process of creating the black soil layer of the stony desertification land, water-retaining and air-permeable agents can be directly added, and the water-retaining and air-permeable agents are mixed in the black soil, wherein the water-retaining and air-permeable agents account for 0.1-15% of the mass of the shale gangue raw black soil B2 material.
Further, the water-retaining and air-permeable agent is at least one of modified bentonite, montmorillonite mineral powder, sodium alginate, methyl cellulose, grafted starch, carboxymethylated starch, phosphate starch, starch xanthate, grafted cellulose, carboxymethylated cellulose, hydroxypropyl cellulose, xanthated cellulose, water-soluble polyacrylate, polyvinyl alcohol, polyoxyalkane, soybean protein, silk protein, gluten, pectin, alginic acid, chitosan, heparin and super absorbent resin.
Further, step (3), creating a stony desertification land black soil layer, and optionally adding modified sand granulated phosphogypsum or modified sand granulated electrolytic manganese slag; the modified granulated phosphogypsum or the elements such as phosphorus, sulfur, iron, calcium, magnesium, manganese and the like in the granulated electrolytic manganese slag are used as trace element fertilizers.
Further, the modified sand granulated phosphogypsum/modified sand granulated electrolytic manganese slag adopts a heavy metal curing agent to effectively fix heavy metal ions in the phosphogypsum/electrolytic manganese slag so as not to migrate; the phosphogypsum/electrolytic manganese slag heavy metal solidification sand granulation solves the acid problem and the migration problem of heavy metal ions, can increase the air permeability of artificial soil, and can inhibit the hardening effect of sulfate ions on soil.
Further, the total weight of the modified sand granulated phosphogypsum/modified sand granulated electrolytic manganese slag is 1-35% of the mass of the black soil C material.
Further, in the step (3), one or more of nitrogenous fertilizer, phosphate fertilizer, potash fertilizer, fermented kitchen matters, plant ash, biomass powder, natural soil and calcined clay can be properly added in the process of creating the black soil layer of the stony desertification land.
In the steps (2) and (3), a heavy metal ion curing agent can be added. The heavy metal ion curing agent is used for curing, adsorbing and capturing heavy metal ions in the artificial black soil material to form a precipitate which is insoluble in water and is not easy to be absorbed by plants, so that the aim of removing heavy metal biological pollution is fulfilled; the heavy metal ion curing agent also comprises at least one of modified bentonite powder, montmorillonite mineral powder type unit cell interlayer adsorbent, xanthates, dithiocarbamates and acrylic chelating agents.
Further, in the step (4), the economic crops capable of improving soil structure and fertility are preferably one or more of Chinese tallow, giant fungus, red sorghum, super arundo donax, tobacco and the like.
Aiming at the ore forming conditions of the bulk solid waste coal gangue in the coal industry, the mineral composition characteristics of the coal gangue, the mineral crystal characteristics of the bulk solid waste phosphogypsum and the characteristic that the formed mineral components are distributed and adsorbed on gypsum crystals, the coal gangue is separated into a material A rich in carbon scraps and a material B of clean black shale which is rich in humus and contains a large amount of mineral trace elements by a simple mechanical separation impurity removal technology with low energy consumption and no pollution, and the material A is recycled to comprehensively utilize cement plant resources and reduce the material coal consumption or be used for fuel power generation of a thermal power plant. The method is characterized in that a B material (original black soil formed underground) which is naturally enriched with humus and contains a large amount of mineral trace elements is converted into artificial black soil through water retention and ventilation modification, livestock manure microorganism modification, earthworm biological and plant root system continuous activation modification and other measures, phosphogypsum is modified into a heavy metal solidification phosphogypsum cementing material and a solidification and sand-granulating material, and a greening concrete base layer and a black soil layer are respectively manufactured by the modified phosphogypsum and shale gangue which absorbs water and swells into clay, so that the stony desertification soil can be effectively converted into high-quality black soil, and the soil fertility is continuously enhanced.
The invention has the beneficial effects that: 1. the black soil prepared from the full solid waste effectively solves the problems of large amount of piling pollution of coal gangue and phosphogypsum and low resource recycling rate, and is expected to avoid the instability caused by using the large amount of solid waste as roadbed and pit filling materials and the potential hidden trouble of pollution to groundwater and soil. The technology for manufacturing the black land by using full solid waste decarburization is expected to fundamentally solve the problems of soil nutrient deficiency, poor soil structure, low fertility and serious wind erosion in stony desertification areas, and can be used for ecological restoration of stony desertification lands on a large scale; 2. the method is expected to effectively solve the problems that limited farmland cultivated land is occupied and sludge water and soil are continuously used because billions of tons of coal gangue are planted in the land due to environmental protection pressure and simple earth covering and vegetation filling modes; 3. various mineral components in a large amount of solid waste coal gangue, including carbon-containing materials enriched in the poor-quality coal gangue, can be effectively utilized with low energy consumption and no secondary pollution, and can be used for reducing the material coal consumption and replacing clay in cement factories, and the limestone sandstone silica part with hard texture can be used as general building sandstone aggregate and shale gangue rich in humus and minerals, namely artificial black soil prepared from natural raw black soil, so that waste materials are changed into valuable things and the best use of the materials are truly realized; 4. the method opens the way of preparing greening concrete by heavy metal solidification modified phosphogypsum and solidifying heavy metal granulating phosphogypsum to enrich soil, and creates technical conditions for large-scale absorption of phosphogypsum while effectively utilizing phosphogypsum mineral characteristics and plant nutrient elements; 5. the method effectively solves the difficult problems that the number of the ground black soil resources is very limited and the resources are not renewable, the coal gangue is pre-separated and decontaminated to obtain a great amount of valuable clean raw black soil deeply buried under the ground for tens of thousands of years, and the valuable raw black soil can be quickly converted into high-quality cooked black soil suitable for cultivation through simple low-cost water-retaining and ventilation modification, livestock manure bacterial introduction modification and earthworm bio-phagocytosis biochemical modification, thereby providing a solid technology and material foundation for the improvement of stony desertification soil into high-quality agriculture and forestry cultivated land in China.
Detailed Description
Embodiments of the present invention will be described in further detail with reference to examples.
Example 1
The method comprises the following steps:
(1) Solid waste pretreatment:
1) Pretreatment of coal gangue: according to the characteristics that carbon is difficult to biodegrade into organic humus, carbon has natural adsorption characteristics for heavy metals, heavy metals in coal or the heavy metals are adsorbed in crystalline block granular coal or the heavy metals exist in block ores, coal gangue with the heat value of 720KJ/KG is pre-separated into A materials (namely carbonaceous scrap materials obtained by decarbonization, the average heat value of the separated carbonaceous materials is 1217 KJ/KG) and B1 materials (namely shale gangue materials with block granular humus and visible block harmful minerals such as pyrite and arsenite and the like) by mechanical separation, wherein the A materials (the carbonaceous materials) enrich the carbonaceous materials for the coal gangue, and comprise most of small granular carbon scraps and most of heavy metal impurities naturally adsorbed by the coal. The coal gangue is pre-separated and decontaminated, namely, most carbon particles which are difficult to degrade and have no actual fertilizer efficiency are removed, and the content of heavy metals possibly existing is reduced to the maximum extent, so that cleaner shale gangue (B1 material-raw black soil) containing humus aluminosilicate minerals is obtained; crushing the material B (raw black soil) to 1 um-1 mm (46.5%), 1-5 mm (31.8%), 5-20 mm (21.7%) by using a crushing machine, and mixing the materials with particle sizes to obtain raw black soil (material B2);
The material A generated by pre-separating the gangue is an enriched aluminosilicate mineral mixture containing a large amount of carbon scraps, and is modified and processed into energy-saving slag powder, and then the energy-saving slag powder is supplied to a cement clinker production line for comprehensive utilization of resources and coal-saving materials, and limestone and sandstone aggregates generated by pre-separating and removing impurities are used for producing building sandstone; pyrite and the like produced by pre-separation and impurity removal are used as special ore materials;
2) Phosphogypsum pretreatment is modified phosphogypsum (C material): uniformly mixing phosphogypsum and a heavy metal curing agent by stirring machinery according to the mass ratio of 100:10 to obtain modified phosphogypsum (C1 material), wherein the mixed C1 material can be used as a cementing material when not completely cured, and the mixed C1 material can be used as a sand material with potential biological fertilizer efficiency after completely curing sand granulation;
the heavy metal ion curing agent is a commercial aqueous solution of water-containing glass and meta-aluminate;
3) Preparing a livestock manure waste bacterial agent (D material): naturally aging and fermenting livestock manure waste for fifteen days to obtain a fattening microorganism bacterial agent;
4) Preparation of a biophysical activator (E material): preparing soil containing earthworm eggs;
(2) Setting a stony desertification ground bottom layer (base layer) "greening concrete" layer:
the preparation method comprises the following steps of taking a water-swellable B1 material (shale gangue raw black soil) as aggregate, taking a mixed incompletely cured modified phosphogypsum C2 material as a gelling and curing material, and mixing the following B1 materials in mass ratio: the C2 materials are mixed according to the proportion of 50:50, are paved on a stony desertification land for compaction, have the thickness of 200mm, form a greening concrete layer of the modified phosphogypsum shale gangue, form a stabilizing layer of the stony desertification land for changing into a black land, and have the solidification and recrystallization characteristics of the modified phosphogypsum, so that the bottom layer of the stony desertification land is stable and permeation-resistant, the plant root system can be ensured to grab phosphorus, sulfur, calcium, magnesium, potassium and other elements in the phosphogypsum, and the plant root system can be ensured to fully extend into a longitudinal stone seam interlayer below;
(3) Creating a stony desertification land black soil layer: uniformly mixing shale gangue raw black soil (B2 material), solidified and granulated modified phosphogypsum (C1 material), livestock manure waste microbial inoculum (D material) and earthworm egg-containing manure soil (E material) according to the mass ratio of 100:40:20:0.5 by using a stirring machine, paving the mixture on a greening concrete layer with the thickness of 500mm arranged in the step (2) to form a black soil layer, and spraying a water-retaining dust-proof agent to ensure that the moisture content of the black soil layer reaches 10-30%, so as to prepare the biochemical black soil layer;
(4) Continuously curing the black soil by the plants: and (3) planting commercial crops on the stony desertification land black soil layer created in the step (3) to continuously activate and mature black soil.
Experiments are carried out on stony desertification land of a certain Guizhou land, sorghum is directly planted on the stony desertification land, the survival rate of seedlings is less than 70%, and nitrogen fertilizer and phosphate fertilizer are required to be supplemented for many times in the plant growth process; after the transformation by the method, water and soil are effectively maintained, the survival rate of seedlings is up to 98%, the seedlings grow vigorously, the plant root systems are luxuriant, most of the plant root systems directly penetrate through a greening concrete layer with the thickness of 200mm, the yield can be increased without fertilization, the soil fertility is tested after multipoint sampling homogenization, the fertility is basically stable, and the heavy metal detection cannot be detected.
Example 2
The method comprises the following steps:
(1) Solid waste pretreatment:
1) Pretreatment of coal gangue: according to the characteristics that carbon is difficult to biodegrade into organic humus, carbon has natural adsorption characteristics for heavy metals, heavy metals in coal or the heavy metals are adsorbed in crystalline block granular coal or the heavy metals exist in block ores, coal gangue with the heat value of 850KJ/KG is mechanically separated and pre-separated into materials A (namely carbonaceous scrap materials obtained by decarbonization, the average heat value of the separated carbonaceous materials is 1400 KJ/KG), and materials B1 (namely shale gangue materials with block granular humus and visible block harmful minerals such as pyrite and arsenite are selected and removed), wherein the materials A (carbonaceous materials) are the coal gangue enriched carbonaceous materials, and comprise most small granular carbon scraps and most heavy metal impurities naturally adsorbed by the coal. The coal gangue is pre-separated and decontaminated, namely, most carbon particles which are difficult to degrade and have no actual fertilizer efficiency are removed, and the content of heavy metals possibly existing is reduced to the maximum extent, so that cleaner shale gangue (B1 material-raw black soil) containing humus aluminosilicate minerals is obtained; crushing the material B (raw black soil) to 1 um-1 mm (50.2%), 1-5 mm (36.1%), and 5-20 mm (13.7%) by using a crushing machine, and mixing the materials with particle sizes to obtain raw black soil (material B2).
The material A generated by pre-separating gangue is an enriched aluminosilicate mineral mixture material containing a large amount of carbon scraps, and is directly supplied to a cement clinker production line to be used as a material for comprehensively utilizing resources and saving coal, and limestone and sandstone aggregates generated by pre-separating and removing impurities are used for producing building sandstones; pyrite produced by pre-separation and impurity removal is used as special ore material.
2) Phosphogypsum pretreatment is modified phosphogypsum (C material): uniformly mixing phosphogypsum with cement and a heavy metal curing agent according to the mass ratio of 100:10:5 to obtain modified phosphogypsum (C2 material); the mixed C2 material can be used as a cementing material when not completely solidified, and the mixed C2 material can be used as a sand material with potential biological fertilizer effect after being completely solidified and granulated.
The heavy metal ion curing agent is a commercial aqueous solution of water-containing glass and acrylic resin.
3) Preparing a livestock manure waste bacterial agent (D material): the livestock manure waste is naturally aged and fermented for ten days and is used as a fattening microorganism bacterial initiator.
4) Preparation of a biophysical activator (E material): preparing healthy earthworms.
(2) Setting a stony desertification ground bottom layer (base layer) "greening concrete" layer:
the preparation method comprises the following steps of taking a water-swellable B1 material (shale gangue) as aggregate, taking a mixed incompletely cured modified phosphogypsum C2 material as a gelled curing material, and mixing the B1 material according to the mass ratio: the C2 materials are mixed according to the proportion of 70:30, are paved on a stony desertification land for compaction, have the thickness of 1000mm, form a modified phosphogypsum shale gangue greening concrete, form a stabilizing layer of the stony desertification land for changing into a black land, and have the solidification and recrystallization characteristics of the modified phosphogypsum, so that the bottom layer of the stony desertification land is stable and permeation-resistant, the plant root system can be ensured to grab phosphorus, sulfur, calcium, magnesium, potassium and other elements in the phosphogypsum, and the plant root system can be ensured to fully extend into a longitudinal stone seam interlayer below;
(3) Creating a stony desertification land black soil layer: uniformly mixing shale gangue raw black soil (B2 material), solidified and granulated modified phosphogypsum (C2 material) and livestock manure waste bacterial agent (D material) according to the mass ratio of 100:25:20 by using a stirring machine, paving the mixture on the greening concrete set in the step (2) to form a black soil layer with the thickness of 2500mm, and then spraying a water-retaining dust-proof agent to enable the moisture content of the black soil layer to be about 30% to prepare biochemical black soil; preparing (E material) the bio-phagocytic activator, and introducing the earthworms into the black soil at intervals after laying the black soil layer to activate the black soil by bio-phagocytic;
(4) Continuously curing the black soil by the plants: and (3) planting red sorghum on the black soil layer of the stony desertification land created in the step (3), wherein the survival rate of seedlings is up to 100%, the water and the fertilizer are effectively preserved, the root system of the red sorghum is developed, the black soil can be effectively and continuously cured, and the yield can be increased without additional fertilizer application.
Example 3
The method comprises the following steps:
(1) Solid waste pretreatment:
1) Pretreatment of coal gangue: according to the characteristics that carbon is difficult to biodegrade into organic humus, carbon has natural adsorption characteristics for heavy metals, heavy metals in coal or the heavy metals are adsorbed in crystalline block granular coal or the heavy metals exist in block ores, coal gangue with the heat value of 1350KJ/KG is pre-separated into A materials (namely carbonaceous scrap materials obtained by decarbonization, the average heat value of the separated carbonaceous materials is 2630 KJ/KG) and B1 materials (namely shale gangue materials with block granular humus and visible block harmful minerals such as pyrite and arsenite and the like) by mechanical separation, wherein the A materials (the carbonaceous materials) enrich the carbonaceous materials for the coal gangue, and comprise most of small granular carbon scraps and most of heavy metal impurities naturally adsorbed by the coal. The coal gangue is pre-separated and decontaminated, namely, most carbon particles which are difficult to degrade and have no actual fertilizer efficiency are removed, and the content of heavy metals possibly existing is reduced to the maximum extent, so that cleaner shale gangue (B1 material-raw black soil) containing humus aluminosilicate minerals is obtained; crushing the material B (raw black soil) to 1 um-1 mm (22.3%), 1-5 mm (46.1%), 5-20 mm (31.6%) by using a crushing machine, and mixing the materials with particle sizes to obtain raw black soil (material B2);
The material A generated by pre-separating gangue is an enriched aluminosilicate mineral mixture material containing a large amount of carbon scraps, and is directly supplied to a cement clinker production line to be used as a material for comprehensively utilizing resources and saving coal, and limestone and sandstone aggregates generated by pre-separating and removing impurities are used for producing building sandstones; pyrite and the like produced by pre-separation and impurity removal are used as special ore materials;
2) Phosphogypsum pretreatment is modified phosphogypsum (C material): uniformly mixing phosphogypsum and a heavy metal curing agent by stirring machinery according to the mass ratio of 100:5.5 to obtain modified phosphogypsum (C1 material); the mixed C1 material can be used as a cementing material when not completely solidified, and the mixed C1 material can be used as a sand material with potential biological fertilizer effect after being completely solidified and granulated;
the heavy metal ion curing agent is a commercial aqueous solution of meta-aluminate and water-soluble silicone resin;
3) Preparing a livestock manure waste bacterial agent (D material): naturally aging and fermenting livestock manure waste for ten days to obtain a fattening microorganism bacterial agent;
4) Preparation of a biophysical activator (E material): preparing healthy earthworm egg fecal soil;
(2) Setting a stony desertification ground floor (base layer) "greening concrete":
the preparation method comprises the following steps of taking a water-swellable B1 material (shale gangue) as aggregate, taking a mixed incompletely cured modified phosphogypsum C1 material as a gelled curing material, and mixing the B1 material according to the mass ratio: the C1 materials are mixed according to the proportion of 40:60, are paved on a stony desertification land for compaction, and have the thickness of 800mm, so that a modified phosphogypsum shale gangue greening concrete is formed, a stabilizing layer of the stony desertification land is changed into a black land is formed, the solidification and recrystallization characteristics of the modified phosphogypsum not only meet the requirement of stabilizing and resisting permeation of a bottom layer of the stony desertification land, but also ensure that plant root systems grab phosphorus, sulfur, calcium, magnesium, potassium and other elements in the phosphogypsum, and can ensure that the plant root systems fully extend into a longitudinal stone seam interlayer below;
(3) Creating a stony desertification land black soil layer: the shale gangue raw black soil (B2 material), the solidified and granulated modified phosphogypsum (C1 material), the livestock manure waste bacterial agent (D material) and the earthworm egg-containing manure soil (E material) are mixed by stirring machinery: the water-retaining air-permeable agent modified bentonite is prepared from the following components in percentage by mass: 15, paving the mixture on the greening concrete arranged in the step (2) to form a black soil layer with the thickness of 3000mm, and then spraying a water-retaining dust-proof agent to make the moisture content of the black soil layer between 10 and 30 percent to prepare biochemical black soil;
(4) Continuously curing the black soil by the plants: and (3) planting the pennisetum hydridum on the stony desertification land black soil layer created in the step (3), wherein the pennisetum hydridum has developed root systems, luxuriant growth and high grass yield, can continuously provide green feed and effectively activate cured black soil.
Example 4
The method comprises the following steps:
(1) Solid waste pretreatment:
1) Pretreatment of coal gangue: according to the characteristics that carbon is difficult to biodegrade into organic humus, carbon has natural adsorption characteristics for heavy metals, heavy metals in coal or the heavy metals are adsorbed in crystalline block granular coal or the heavy metals exist in block ores, coal gangue with the heat value of 1300KJ/KG is pre-separated into A materials (namely carbonaceous scrap materials obtained by decarbonization, the average heat value of the separated carbonaceous materials is 2270 KJ/KG) and B1 materials (namely shale gangue materials with block granular humus and visible block harmful minerals such as pyrite and arsenite and the like) by mechanical separation, wherein the A materials (the carbonaceous materials) enrich the carbonaceous materials for the coal gangue, and comprise most of small granular carbon scraps and most of heavy metal impurities naturally adsorbed by the coal. The coal gangue is pre-separated and decontaminated, namely, most carbon particles which are difficult to degrade and have no actual fertilizer efficiency are removed, and the content of heavy metals possibly existing is reduced to the maximum extent, so that cleaner shale gangue (B1 material-raw black soil) containing humus aluminosilicate minerals is obtained; crushing the material B (raw black soil) to 1 um-1 mm (51.5%), 1-5 mm (26.4%), 5-20 mm (22.1%) by using a crushing machine, and mixing the materials with particle sizes to obtain raw black soil (material B2);
The material A generated by pre-separating gangue is an enriched aluminosilicate mineral mixture material containing a large amount of carbon scraps, and is directly supplied to a cement clinker production line to be used as a material for comprehensively utilizing resources and saving coal, and limestone and sandstone aggregates generated by pre-separating and removing impurities are used for producing building sandstones; pyrite and the like produced by pre-separation and impurity removal are used as special ore materials;
2) Phosphogypsum pretreatment is modified phosphogypsum (C material): uniformly mixing phosphogypsum and a heavy metal curing agent by stirring machinery according to the mass ratio of 100:12.5 to obtain modified phosphogypsum (C1 material); the mixed C1 material can be used as a cementing material when not completely solidified, and the mixed C1 material can be used as a sand material with potential biological fertilizer effect after being completely solidified and granulated;
the heavy metal ion curing agent is water-based glass and aqueous solution of methyl silicate and acrylic resin which are sold in the market;
3) Pretreatment (D material) of livestock manure waste microbial inoculum: naturally aging and fermenting livestock manure waste for ten days to obtain a fattening microorganism bacterial agent;
4) Bio-phagocytic activator preparation (material E): soil containing earthworm eggs and feces;
(2) Setting a stony desertification ground bottom layer (base layer) "greening concrete" layer:
the preparation method comprises the following steps of taking a water-swellable B1 material (shale gangue) as aggregate, taking a mixed incompletely cured modified phosphogypsum C1 material as a gelled curing material, and mixing the B1 material according to the mass ratio: the C1 materials are mixed according to the proportion of 68:32, are paved on a stony desertification land for compaction, have the thickness of 700mm, form a greening concrete layer of the modified phosphogypsum shale gangue, form a stabilizing layer of the stony desertification land for changing into a black land, and have the solidification and recrystallization characteristics of the modified phosphogypsum, so that the bottom layer of the stony desertification land is stable and permeation-resistant, the plant root system can be ensured to grab phosphorus, sulfur, calcium, magnesium, potassium and other elements in the phosphogypsum, and the plant root system can be ensured to fully extend into a longitudinal stone seam interlayer below;
(3) Creating a stony desertification land black soil layer: the shale gangue raw black soil (B2 material), the solidified and granulated modified phosphogypsum (C1 material), the livestock manure waste bacterial agent (D material) and the earthworm egg-containing manure soil (E material) are mixed by stirring machinery: the mass ratio of the modified sand granulated electrolytic manganese slag is 100:40:15:1.2:10 are uniformly mixed, paved on the greening concrete arranged in the step (2) with the thickness of 2800mm to form a black soil layer, and then sprayed with a water-retaining dust-proof agent to ensure that the moisture content of the black soil layer is between 10 and 30 percent to prepare a biochemical black soil layer;
(4) Continuously curing the black soil layer by plants: and (3) planting Chinese tallow trees on the black soil layer of the stony desertification land created in the step (3), continuously curing the black soil, effectively preserving water, facilitating greening and organic matter regeneration of the stony desertification land, and simultaneously, creating higher economic value for people.
Example 5
The method comprises the following steps:
(1) Solid waste pretreatment:
1) Pretreatment of coal gangue: according to the characteristics that carbon is difficult to biodegrade into organic humus, carbon has natural adsorption characteristics for heavy metals, heavy metals in coal or the heavy metals are adsorbed in crystalline block granular coal or are present in block ores, coal gangue with the heat value of 1530KJ/KG is mechanically separated and pre-separated into A materials (namely carbonaceous scrap materials obtained by decarbonization, the average heat value of the separated carbonaceous materials is 2820 KJ/KG), B1 materials (namely shale gangue materials with block granular humus and visible block harmful minerals such as pyrite and arsenite and the like are selected and removed), and the A materials (the carbonaceous materials) are the coal gangue enriched carbonaceous materials, wherein the A materials comprise most small granular carbon scraps and most heavy metal impurities naturally adsorbed by the coal. The coal gangue is pre-separated and decontaminated, namely, most carbon particles which are difficult to degrade and have no actual fertilizer efficiency are removed, and the content of heavy metals possibly existing is reduced to the maximum extent, so that cleaner shale gangue (B1 material-raw black soil) containing humus aluminosilicate minerals is obtained; crushing the material B (raw black soil) to 1 um-1 mm (42.2%), 1-5 mm (36.3%), 5-20 mm (21.5%) by using a crushing machine, and mixing the materials with particle sizes to obtain raw black soil (material B2);
The material A generated by pre-separating gangue is an enriched aluminosilicate mineral mixture material containing a large amount of carbon scraps, and is directly supplied to a cement clinker production line to be used as a material for comprehensively utilizing resources and saving coal, and limestone and sandstone aggregates generated by pre-separating and removing impurities are used for producing building sandstones; pyrite and the like produced by pre-separation and impurity removal are used as special ore materials;
2) Phosphogypsum pretreatment is modified phosphogypsum (C material): uniformly mixing phosphogypsum and a heavy metal curing agent by stirring machinery according to the mass ratio of 100:4.5 to obtain modified phosphogypsum (C1 material); the mixed C1 material can be used as a cementing material when not completely solidified, and the mixed C1 material can be used as a sand material with potential biological fertilizer effect after being completely solidified and granulated;
the heavy metal ion curing agent is a commercial aqueous solution containing meta-aluminate and acrylic resin;
3) Preparing a livestock manure waste bacterial agent (D material): naturally aging and fermenting livestock manure waste for ten days to obtain a fattening microorganism bacterial agent;
4) Preparation of a biophysical activator (E material): soil containing earthworm eggs and feces;
(2) Setting a stony desertification ground bottom layer (base layer) "greening concrete" layer:
the method comprises the steps of taking a water-swellable B1 material (shale gangue) as aggregate, taking a mixed incompletely cured modified phosphogypsum C1 material as a gelling curing material, mixing the materials according to the mass ratio of B1 material to C1 material to heavy metal curing agent of 62:33:5, paving on a stony desertification land, compacting the mixture to form a modified phosphogypsum shale gangue greening concrete layer with the thickness of 700mm, forming a stabilizing layer of the stony desertification land modified black land, wherein the curing and recrystallization characteristics of the modified phosphogypsum not only meet the stable permeation resistance of the bottom layer of the stony desertification land, but also ensure the grabbing of phosphorus, sulfur, calcium, magnesium, potassium and other elements in the phosphogypsum by plant root systems, and ensure the plant root systems to fully extend into a longitudinal stone seam interlayer below;
(3) Creating a stony desertification land black soil layer: the shale gangue raw black soil (B2 material), the solidified and granulated modified phosphogypsum (C1 material), the livestock manure waste bacterial agent (D material) and the earthworm egg-containing manure soil (E material) are mixed by stirring machinery: uniformly mixing the modified sand-grained electrolytic manganese slag and the heavy metal curing agent according to the mass ratio of 100:22:15:1.2:10:3, paving the mixture on the greening concrete arranged in the step (2) to form a black soil layer with the thickness of 1300mm, and then spraying the water-retaining dust-proof agent to ensure that the moisture content of the black soil layer is between 10 and 30 percent to prepare the biochemical black soil layer;
(4) Continuously curing the black soil by the plants: and (3) planting economic crops such as tobacco on the black soil layer of the stony desertification land created in the step (3), and planting tobacco on the black soil layer, wherein the tobacco has luxuriant branches and leaves, rapid growth and high yield benefit, and the tobacco has developed root system and is easy to plant, activate and cure the black soil, so that the soil fertility is not degraded for a long time.
Claims (10)
1. The method for changing the stony desertification land into the black land by utilizing the solid waste coal gangue and phosphogypsum is characterized by comprising the following steps of:
(1) Pretreatment of solid waste
1) Pretreatment of coal gangue: according to the characteristics that carbon is difficult to biodegrade into organic humus, carbon has natural adsorption characteristics on heavy metals, heavy metals in coal are adsorbed in crystalline block granular coal or are present in block ores, the coal gangue is mechanically separated and pre-separated into a material A (namely carbonaceous scrap material obtained by decarburization) and a material B1 (namely shale gangue material containing block granular humus and selecting and removing visible block harmful minerals such as pyrite, arsenite and the like, which can be called as 'raw black soil'), wherein the material A (carbonaceous material) is a coal gangue enriched carbonaceous material, and contains most of small granular carbon scraps and most of heavy metal impurities naturally adsorbed by the coal carbon; the B1 material (original black soil) is coal gangue pre-separation impurity removal, namely, most of carbon particles which are difficult to degrade and have no actual fertilizer efficiency are removed, and the content of heavy metals possibly existing is reduced to the maximum extent, so that cleaner shale gangue containing humus aluminosilicate minerals is obtained; crushing the material B1 to 1 um-1 mm 10-70%, 1 mm-5 mm 10-50% and 5 mm-20 mm 10-50% by using a crushing machine to obtain raw black soil, wherein the code name is B2;
The material A generated by pre-separating the gangue is an enriched mineral mixture containing a large amount of carbon dust aluminosilicate, and can be directly supplied or modified to be processed into energy-saving slag powder, and then is supplied to a cement clinker production line for comprehensive utilization of resources and saving of materials of coal, or is supplied to a thermal power plant for fuel power generation, or is used for floating carbon; limestone and sandstone aggregates generated by pre-separation and impurity removal can be used for producing building sandstone; pyrite and the like generated by pre-separation and impurity removal can be used as special ore materials;
2) The phosphogypsum pretreatment is modified phosphogypsum: uniformly mixing phosphogypsum and a heavy metal curing agent by stirring machinery according to the mass ratio of 100:1-15 to obtain modified phosphogypsum, wherein the code name is C1 material; or uniformly mixing phosphogypsum, cement and a heavy metal curing agent according to the mass ratio of 100:5-20:1-15 to obtain modified phosphogypsum, wherein the code name is C2 material; when the C1 material or the C2 material is not completely cured, the material can be used as a cementing material; after the C1 material or the C2 material is completely solidified and granulated, the sand material can be used as the sand material with potential biological fertilizer efficiency;
3) Preparing a bacterial agent for livestock manure waste: naturally aging and fermenting livestock and poultry manure waste for more than seven days, and taking the livestock and poultry manure waste as a fattening microorganism bacterial introducing agent, wherein the code name is D material;
4) Preparation of the bio-phagocytic activator: the prepared healthy earthworms or the faeces soil containing the earthworms eggs are named as E material;
(2) Setting a stony desertification ground bottom layer (also called as a base layer ")" greening concrete "layer:
the method comprises the steps of taking a raw black soil B1 material (shale gangue) capable of expanding after water absorption as aggregate, taking a modified phosphogypsum C2 material which is not completely solidified as a cementing and solidifying material, mixing the materials according to a mass ratio of B1 material to C2 material of 30-70:70-30, paving the materials on a stony desertification land, compacting the materials with a thickness of 200-2000 mm to form a modified phosphogypsum shale gangue layer, and naming the modified phosphogypsum shale gangue layer as a greening concrete layer to form a stabilizing layer for changing the stony desertification land into the black soil; the solidification and recrystallization characteristics of the modified phosphogypsum not only meet the requirement of stable permeation resistance of the bottom layer of the stony desertification land, but also ensure that the plant root system can grab phosphorus, sulfur, calcium, magnesium, potassium and other elements in the phosphogypsum, and can fully extend into the longitudinal stone seam interlayer below;
(3) Creating a stony desertification land black soil layer: uniformly mixing raw black soil B2 material, solidified and granulated modified phosphogypsum C1 material or C2 material, livestock manure waste microbial inoculum D material and earthworm egg-containing manure E material according to the mass ratio of 100:10-50:0.5-35:0.05-5 by using a stirring machine, paving the mixture on a greening concrete layer arranged in the step (2) to form a black soil layer with the thickness of 500-5000 mm, and then spraying a water-retaining dust-proof agent to ensure that the moisture content of the black soil layer reaches 10-30% by mass to form a biochemical black soil layer; if the E material of the bio-phagocytic activator is directly earthworms, the E material earthworms can be intermittently introduced into the black soil to bio-phagocytize and activate the black soil after laying the black soil layer;
(4) Continuously curing the black soil by the plants: and (3) planting economic crops capable of improving soil structure and fertility on the stony desertification land black soil layer created in the step (3), and continuously curing the black soil layer.
2. The method for changing a stony desertification land to a black land by utilizing solid waste coal gangue and phosphogypsum according to claim 1, wherein in the step (1), the heavy metal ion curing agent is an aqueous solution of water-containing glass and/or meta-aluminate, methyl silicate, water-soluble silicone resin and/or acrylic resin.
3. The method for changing the stony desertification land into the black land by utilizing the solid waste coal gangue and phosphogypsum according to claim 1 or 2, wherein in the step (3), a water-retention air permeability agent is directly added in the process of creating the stony desertification land black land layer, the water-retention air permeability agent is mixed in the black land, and the water-retention air permeability agent accounts for 0.1-15% of the mass of the shale gangue raw black soil B2 material.
4. The method for changing solid waste coal gangue and phosphogypsum into black land according to claim 1 or 2, wherein the water-retaining air-permeable agent is at least one of modified bentonite, montmorillonite mineral powder, sodium alginate, methyl cellulose, grafted starch, carboxymethylated starch, phosphated starch, starch xanthate, grafted cellulose, carboxymethylated cellulose, hydroxypropylated cellulose, xanthated cellulose, water-soluble polyacrylate, polyvinyl alcohol, polyoxyalkane, soy protein, silk protein, gluten, pectin, alginic acid, chitosan, heparin, and super absorbent resin.
5. The method for changing a stony desertification land to a black land by utilizing solid waste coal gangue and phosphogypsum according to claim 1 or 2, wherein in the step (3), a stony desertification land black soil layer is created, and modified sand granulated phosphogypsum or modified sand granulated electrolytic manganese slag is also added.
6. The method for changing solid waste coal gangue and phosphogypsum into black land in stony desertification according to claim 5, wherein the modified sand granulated phosphogypsum/modified sand granulated electrolytic manganese slag is modified sand granulated phosphogypsum/sand granulated electrolytic manganese slag which adopts heavy metal curing agent to effectively fix heavy metal ions in phosphogypsum/electrolytic manganese slag so as not to migrate.
7. The method for changing the rock-desertification land into the black land by utilizing the solid waste coal gangue and the phosphogypsum as claimed in claim 5, wherein the total mass of the mixture ratio of the modified sand granulated phosphogypsum/the sand electrolytic manganese slag is 1-35% of the mass of the black soil C material.
8. The method for changing the stony desertification land to the black land by utilizing the solid waste coal gangue and the phosphogypsum according to claim 1 or 2, wherein in the step (3), one or more of nitrogen fertilizer, phosphate fertilizer, potash fertilizer, fermented kitchen matters, plant ash, biomass powder, natural soil and calcined clay are also added in the process of creating the stony desertification land black soil layer.
9. The method for changing a stone desertification land to a black land by utilizing solid waste coal gangue and phosphogypsum according to claim 1 or 2, wherein in the steps (2) and (3), a heavy metal ion curing agent is also added, and the heavy metal ion curing agent further comprises modified bentonite powder, montmorillonite mineral powder type unit cell interlayer adsorbent, and at least one of xanthates, dithiocarbamates and acrylic chelating agents.
10. The method for changing the rock desertification land to the black land by utilizing the solid waste coal gangue and the phosphogypsum according to claim 1 or 2, wherein in the step (4), the economic crops capable of improving the soil structure and the fertility are one or more of Chinese tallow tree, giant fungus grass, red sorghum, super arundo donax and tobacco.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311389019.5A CN117716829A (en) | 2023-10-25 | 2023-10-25 | Method for changing stony desertification land into black land by using solid waste coal gangue phosphogypsum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311389019.5A CN117716829A (en) | 2023-10-25 | 2023-10-25 | Method for changing stony desertification land into black land by using solid waste coal gangue phosphogypsum |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117716829A true CN117716829A (en) | 2024-03-19 |
Family
ID=90209539
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311389019.5A Pending CN117716829A (en) | 2023-10-25 | 2023-10-25 | Method for changing stony desertification land into black land by using solid waste coal gangue phosphogypsum |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117716829A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117801827A (en) * | 2024-03-01 | 2024-04-02 | 昆明理工大学 | Preparation technical method of barren soil conditioner in mountain area of plateau |
-
2023
- 2023-10-25 CN CN202311389019.5A patent/CN117716829A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117801827A (en) * | 2024-03-01 | 2024-04-02 | 昆明理工大学 | Preparation technical method of barren soil conditioner in mountain area of plateau |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102408279B (en) | Efficient green micro-crystallized mineral-biological compound fertilizer and production method thereof | |
| CN102391878B (en) | Method for producing long-acting soil conditioning agent by using potassium feldspar and organic waste | |
| CN102618295A (en) | Soil improving substrate suitable for ecological restoration of mine and preparation method thereof | |
| CN103275731A (en) | Saline-alkali soil modifier and preparation method and application thereof | |
| CN102775206A (en) | Method for preparing improved matrix capable of improving urban soil properties | |
| CN1793065A (en) | Process for producing slow releasing silicon potassium compound fertilizer by potassium feldspar | |
| CN107973640A (en) | Sandy alkaline land improving compound fertilizer in strand and preparation method thereof | |
| CN109942347B (en) | Method for preparing microbial fertilizer by taking coal gangue as raw material | |
| CN105777424A (en) | Acid soil conditioner prepared from iron ore tailings and preparation method of acid soil conditioner | |
| CN117716829A (en) | Method for changing stony desertification land into black land by using solid waste coal gangue phosphogypsum | |
| CN110090845A (en) | A method of utilizing pyrite slag soil red mud | |
| CN109608278A (en) | A kind of formula and preparation method thereof of mine material reparation | |
| CN113861991A (en) | Building residue soil modifier prepared from kitchen waste, preparation method and application of modified building residue soil | |
| CN117362124A (en) | Method for preparing artificial black soil by decarbonizing and impurity removing coal gangue | |
| CN112371090A (en) | Method for preparing artificial soil by mixing and pyrolyzing lead-copper tailings and crop straws | |
| CN106083246A (en) | A kind of saline land greening special fertilizer and preparation, application process | |
| CN114032103A (en) | Method for preparing soil conditioner by high-temperature calcination of phosphogypsum serving as raw material | |
| KR101576282B1 (en) | Fertilizer using waste ston powder and the manufacturing method thereof | |
| CN111592419A (en) | Composite modifier for rare earth mining area soil remediation and preparation method thereof | |
| CN113248333A (en) | Granular soil conditioner for composite heavy metal pollution and preparation method thereof | |
| CN109652081B (en) | Preparation method of acid soil conditioner | |
| CN110342965B (en) | Method for preparing microbial fertilizer | |
| CN116076189A (en) | Method for promoting improvement of red mud soil formation and vegetation recovery by sintering process | |
| CN114907073A (en) | Modified municipal sludge for covering soil of landfill and preparation method thereof | |
| CN114230393A (en) | Special carbon-based organic-inorganic compound fertilizer for saline-alkali soil and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |