CN110498644A - A kind of processing method of arsenic slag - Google Patents
A kind of processing method of arsenic slag Download PDFInfo
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- CN110498644A CN110498644A CN201910915914.3A CN201910915914A CN110498644A CN 110498644 A CN110498644 A CN 110498644A CN 201910915914 A CN201910915914 A CN 201910915914A CN 110498644 A CN110498644 A CN 110498644A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/14—Waste materials; Refuse from metallurgical processes
- C04B18/141—Slags
- C04B18/144—Slags from the production of specific metals other than iron or of specific alloys, e.g. ferrochrome slags
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/006—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing mineral polymers, e.g. geopolymers of the Davidovits type
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- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0003—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability making use of electric or wave energy or particle radiation
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- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
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Abstract
The invention discloses a kind of processing methods of arsenic slag, and tufa stone powder and arsenic ground-slag end are mixed, arsenic mixed-powder is obtained；Croci, aluminium powder and arsenic ground-slag end are mixed again, obtain iron arsenic mixed-powder；Iron arsenic mixed-powder adds water to stir evenly, and obtains iron arsenic mixture slurry；It is stirred and Air Exposure while iron arsenic mixture slurry is carried out low temperature plasma irradiation, obtains corona treatment slurry；Calcium oxide and sodium hydroxide are added in corona treatment slurry, stirs evenly, enters mould, is conserved, demoulding obtains arsenic refuse lac cure body.The removing toxic substances of arsenic slag oxidation and arsenic slag solidification and stabilization have been carried out integrated processing by the present invention, and hypotoxicity pentavalent arsenic is efficiently stable in gelling solidified body；The addition of ferric ion can efficient absorption reducing substances, avoid pentavalent arsenic from being reduced into trivalent arsenic again, maintain the stability of pentavalent arsenic；Arsenic slag cured body strength reaches as high as 51.62MPa, and arsenic leaching concentration is lower than Drinking Water (level-one) arsenic concentration permissible value.
Description
Technical field
The present invention relates to the processing method of arsenic slag more particularly to a kind of places for strengthening the removing toxic substances of arsenic slag and gelling solidification and stabilization
Reason method.
Background technique
Can generate a large amount of arsenic slag in the exploitation, ore dressing, Metallurgy Process of the nonferrous metals ore containing arsenic, arsenic slag usually with
The forms such as arsenic scum, arsenic sulfide slag, arsenic calcium slag and organo-arsenic slag exist.The a variety of arsenic compounds for including in arsenic slag have human body
Toxic will cause human organ damage, while easily induce tissue canceration；The arsenic pollution object that arsenic slag releases in the soil
Plant root growth can also be inhibited, plant withered death is caused, seriously affect the ecological balance.
Currently, the method for disposal for arsenic slag mainly includes elution lixiviation process, electronic removal method, curing/stabilizing method.It answers
Usually require to be added a large amount of eluents with elution lixiviation process disposition arsenic slag, dosing, elution, be also easy to produce in separation of solid and liquid process it is secondary
Pollution problem, and arsenic pollution object removal rate is lower in arsenic slag, there is still a need for advanced treatings for ring waste.It is disposed using electronic removal method
Arsenic slag can be improved the removal rate of arsenic compound in arsenic slag, but its there are water power, energy consumption is high, disposal process generates explosive gas, arsenic
The problems such as enrichment region slag specimen arsenic activity improves.
Curing/stabilizing technology, which refers to, to be changed the spontaneous engineering characteristic of waste by blending additive or is shown by gelling solidification
Write a kind of technology for reducing the potential migratory activity of specific pollutants.Using curing/stabilizing technology disposition arsenic slag, there are glue at present
Gel material activity excitation is insufficient, arsenic slag solidified body arsenic leaching concentration is high, part high price arsenic is reduced in stabilisation/solidification process
The problems such as at low price arsenic.In view of the toxicity and migratory activity of arsenic are related with its valence state, usual lower valency arsenic substance toxicity with move
High-valence state arsenic will be much higher than by moving activity, therefore is converted high-valence state arsenic for lower valency arsenic during disposing arsenic slag and maintained high price
State arsenic stability can not only reduce the arsenic pollution exposure of site operation personnel, can also be improved arsenic in arsenic slag solidified body
Leaching rate.Currently, usually by adding a large amount of oxidants into arsenic slag, agitated, ageing, drying and etc. realize arsenic in arsenic slag
The raising of pollutant valence state.Such method not only directly increases disposition link, but also there are arsenides in arsenic slag to aoxidize
Low efficiency, oxidizer product and curing agent are incompatible, influence the problems such as curing/stabilizing stable conditions.
Summary of the invention
Goal of the invention: it in view of the above problems, the present invention proposes a kind of processing method of arsenic slag, realizes to the efficient of arsenide
Arsenic slag is solidificated in gelling solidified body by the integrated treatment of oxidation removing toxic substances and arsenic slag solidification and stabilization.
Technical solution: tufa stone powder and arsenic ground-slag end are mixed, are obtained by a kind of processing method of arsenic slag of the present invention
Arsenic mixed-powder；Croci, aluminium powder and arsenic ground-slag end are mixed again, obtain iron arsenic mixed-powder；Iron arsenic mixed-powder adds water
It stirs evenly, obtains iron arsenic mixture slurry；By iron arsenic mixture slurry carry out low temperature plasma irradiation while be stirred and aeration at
Reason, obtains corona treatment slurry；Calcium oxide and sodium hydroxide are added in corona treatment slurry, stirs evenly, enters mould, room temperature
Under the conditions of conserve, demould, obtain arsenic refuse lac cure body.
Wherein, the tufa stone powder and the mass ratio at arsenic ground-slag end are 1~2.5:1, and comprehensive arsenic curing degree, arsenic refuse lac are solidifying
The uniaxial compressive strength and cost of solidified body, further preferably 1~2:1 can be 1:1,1.5:1 or 2:1.
The croci, aluminium powder, arsenic mixed-powder mass ratio be 5~12.5:5~12.5:100, comprehensive arsenic is solid
The uniaxial compressive strength and cost of rate, arsenic refuse lac cure body, further preferably 5~10:5~10:100, Ke Yiwei
5:5:100、5:7.5:100、5:10:100、7.5:5:100、7.5:7.5:100、7.5:10:100、10:5:100、10:7.5:
100 or 10:10:100.
The calcium oxide, sodium hydroxide, tufa stone powder mass ratio be 5~12.5:3~7.5:100, comprehensive arsenic solidification
The uniaxial compressive strength and cost of rate, arsenic refuse lac cure body, further preferably 5~10:3~6:100 can be 5:3:
100,5:4.5:100,5:6:100,7.5:3:100,7.5:4.5:100,7.5:6:100,10:3:100,10:4.5:100 or
10:6:100。
The liquid-solid ratio of the water and iron arsenic mixed-powder is 55~65:100 (mL:mg).
Iron arsenic mixture slurry is subjected to low temperature plasma irradiation under 20~80KV output voltage, with 60~120rpm speed
Rate is stirred, after 1~3h stop low temperature plasma irradiation, stirring and Air Exposure, expose into oxygen can absorb high energy electricity
Son increases oxygen radical and hydroxyl free radical yield.
The preparation process at the arsenic ground-slag end is, by the drying of arsenic slag, grinding, cross 200~400 meshes to get.
During Low Temperature Plasma Treating, the high energy electron and active particle of electrode release, which induce, generates a large amount of active matters
Matter and adjoint ultraviolet light, microwave radiation, shock wave and pyrolysis phenomenon.Exposed in iron arsenic mixture slurry into oxygen can absorb high energy
Electronics increases oxygen radical and hydroxyl free radical yield.Oxygen radical and hydroxyl free radical are by out-phase reaction, so that arsenic
Remaining trivalent arsenic is quickly oxidized to the lower pentavalent arsenic of toxicity in slag.The ferric ion of iron arsenic mixture slurry incorporation can have
Effect adsorbs the reducing substances such as high energy electron, hydroperoxyl radical, carbon dioxide free radical and is converted into ferrous ion, to avoid
Pentavalent arsenic is reduced into trivalent arsenic again；Meanwhile the ferrous ion of generation can induce pair generated with low temperature plasma
The reaction of oxygen water, generates hydroxyl free radical and ferric ion.In chemolysis, high energy particle impact, microwave radiation, shock wave
And under pyrolysis collective effect, ionization and dissociation phenomenon occur for aluminium powder, generate poly-aluminium colloid, poly-aluminium colloid and ferric ion knot
It closes, generates Polyaluminium iron colloid, Polyaluminium iron colloid can efficiently adsorb pentavalent arsenic.In high energy particle impact, microwave radiation, impact
Involve under pyrolysis collective effect, the silicate of the glassy state in tufa stone is largely dissolved out and is effectively activated.The silicon of activation
Hydrochlorate substance and the Polyaluminium iron colloid fast reaction for having adsorbed pentavalent arsenic generate three-dimensional geological condensate.Pass through potential balance
Three-dimensional geological condensate is effectively solidificated in chemical bond bridge joint effect pentavalent arsenic.Sodium hydroxide is added to slurry can will more
Polyhydroxyl ion is introduced into liquid environment, and activation base breaking-out is used, and is promoted three-dimensional geological condensate further to polymerize, is generated knot
The finer and close polymer composite body of structure.Hydration reaction occurs for polymer composite body and calcium ion under alkali-activated carbonatite effect, finally
Generate fine and close, high compressive strength gelling solidified body.Pass through chemical balance, chemical bond bridge joint, physically encapsulation comprehensive function, arsenic
Pollutant is by efficiently stable in gelling solidified body.
The utility model has the advantages that compared with prior art, remarkable advantage of the invention is: (1) present invention by arsenic slag oxidation removing toxic substances and
Arsenic slag solidification and stabilization has carried out integrated processing, and the hypotoxicity pentavalent arsenic after oxidation is efficiently stable in gelling solidified body
In, arsenic curing degree reaches as high as 99.71%；(2) addition of ferric ion can efficient absorption reducing substances, avoid pentavalent arsenic
It is reduced into trivalent arsenic again, can effectively maintain the stability of pentavalent arsenic；(3) in glue sand test, arsenic slag cured body strength is most
The Leaching concentration of arsenic, arsenic leaching concentration can be effectively reduced in high reachable 51.62MPa, the so high compression strength of solidified body
Lower than Drinking Water (level-one) arsenic concentration permissible value.
Detailed description of the invention
Fig. 1 is flow chart of the invention.
Specific embodiment
The present invention is further illustrated with reference to the accompanying drawings and examples.
Embodiment 1
The shadow of tufa stone powder and arsenic ground-slag end mass ratio to arsenic refuse lac cure body arsenic curing degree and uniaxial compressive strength
It rings
As shown in Figure 1,200 meshes are crossed in the drying of arsenic slag, grinding, arsenic ground-slag end is obtained, according to mass ratio 5:3:100, respectively
Weigh calcium oxide, sodium hydroxide, tufa stone powder；According to mass ratio 0.5:1,0.7:1,0.9:1,1:1,1.5:1,2:1,2.1:
1,2.3:1,2.5:1 weigh tufa stone powder and arsenic ground-slag end respectively, and mixing stirs evenly, obtains arsenic mixed-powder；According to quality
Than 5:5:100, croci, aluminium powder, arsenic mixed-powder are weighed respectively, are mixed, are stirred evenly, obtain iron arsenic mixed-powder；It presses
Water and iron content arsenic mixed-powder are mixed according to liquid-solid ratio 55:100 (mL:mg), stirs evenly, obtains iron arsenic mixture slurry；To iron arsenic
Mixture slurry carries out low temperature plasma irradiation, plasma power supply (three Xin Huatai electrical test apparatus Co., Ltd of Wuhan) output
Voltage is 20KV, is stirred and is passed through oxygen, stirring rate to iron arsenic mixture slurry while low temperature plasma irradiation
For 60rpm, stops low temperature plasma irradiation, stirring and aeration after 1 hour, obtain plasma treatment slurry；By above-mentioned weighing
Calcium oxide and sodium hydroxide are added in plasma treatment slurry, are sufficiently stirred, and mould is entered, and are conserved 28 days under room temperature, depanning,
Up to arsenic refuse lac cure body.
Uniaxial compressive strength detection: beasurement base " the strength of cement mortar inspection party of arsenic refuse lac cure body compression strength
Method (ISO method) " execution of GB/T 17671-1999 standard.
Arsenic Leaching detection: the arsenic leaching test and leaching concentration of arsenic slag and arsenic refuse lac cure body detection according to
" hazardous waste judging standard leaching characteristic identification " (GB 5085.3-2007) standard executes.
Arsenic curing degree is calculated according to following formula, wherein RGuFor arsenic refuse lac cure body arsenic curing degree (%), cGuFor arsenic slag
The arsenic leaching concentration (mg/L) of gelling solidified body, cSlagFor the arsenic leaching concentration (mg/L) of arsenic slag, test result is shown in Table 1.
1 tufa stone powder of table and arsenic ground-slag end mass ratio are to arsenic refuse lac cure body arsenic curing degree and uniaxial compressive strength
It influences
As seen from Table 1, when tufa stone powder and arsenic ground-slag end mass ratio be less than 1:1 (in such as table 1, tufa stone powder and
Unlisted more low ratio when arsenic ground-slag end mass ratio=0.9:1,0.7:1,0.5:1 and in table 1), impact in high energy particle,
Microwave radiation, impact involve under pyrolysis collective effect, the glassy state silicate for being dissolved out from tufa stone and effectively being activated
It is less, it is reduced so that generating three-dimensional geological condensate, potential balance and chemical bond bridge declines, lead to arsenic refuse lac cure
Body arsenic curing degree is below 82% and as tufa stone powder and the reduction of arsenic ground-slag end mass ratio substantially reduces, uniaxial compressive strength
It is below 29Mpa and as tufa stone powder and the reduction of arsenic ground-slag end mass ratio substantially reduce.When tufa stone powder and arsenic ground-slag
Last mass ratio is equal to 1~2:1 when tufa stone powder and arsenic ground-slag end mass ratio=1:1,1.5:1,2:1 (in such as table 1), in height
Energy particle impacting, microwave radiation, impact involve under pyrolysis collective effect, and the silicate of the glassy state in tufa stone largely dissolves out
Come and effectively activated, it is poly- to generate three-dimensional geological for the silicate material of activation and the Polyaluminium iron colloid fast reaction of pentavalent arsenic
Zoarium acts on arsenic by potential balance and chemical bond bridge joint and is effectively solidificated in three-dimensional geological condensate, final arsenic refuse lac
Cure body arsenic curing degree is above 90%, and uniaxial compressive strength is above 35Mpa.When tufa stone powder and arsenic slag powder quality
Than being higher than 2:1 (in such as table 1, when tufa stone powder and arsenic ground-slag end mass ratio=2.1:1,2.3:1,2.5:1 and in table 1 not
The more ratios enumerated), arsenic refuse lac cure body curing degree and uniaxial compressive strength are with tufa stone powder and arsenic ground-slag end matter
Amount is more unobvious than increasing variation.Therefore, in terms of comprehensive, comprehensive profit and cost, when tufa stone powder and arsenic ground-slag end mass ratio
Equal to 1~2:1, most beneficial for raising arsenic refuse lac cure body arsenic curing degree and uniaxial compressive strength.
Embodiment 2
Croci, aluminium powder, arsenic mixed-powder mass ratio are strong to arsenic refuse lac cure body arsenic curing degree and uniaxial compressive
The influence of degree
By the drying of arsenic slag, grinding, 300 meshes are crossed, arsenic ground-slag end is obtained, according to mass ratio 7.5:4.5:100, weighs oxygen respectively
Change calcium, sodium hydroxide, tufa stone powder；Tufa stone powder and arsenic ground-slag end are weighed respectively according to mass ratio 2:1, are mixed, stirring
Uniformly, arsenic mixed-powder is obtained；According to mass ratio 2.5:2.5:100,3.5:3.5:100,4.5:4.5:100,5:2.5:100,5:
3.5:100、5:4.5:100、2.5:5:100、3.5:5:100、4.5:5:100、5:5:100、5:7.5:100、5:10:100、
7.5:5:100、7.5:7.5:100、7.5:10:100、10:5:100、10:7.5:100、10:10:100、10:10.5:100、
10:11.5:100、10:12.5:100、10.5:10:100、11.5:10:100、12.5:10:100、10.5:10.5:100、
11.5:11.5:100,12.5:12.5:100 weigh croci, aluminium powder, arsenic mixed-powder respectively, and mixing stirs evenly,
Obtain iron arsenic mixed-powder；It is mixed according to liquid-solid ratio 60:100 (mL:mg) Jiang Shui and iron arsenic mixed-powder, stirs evenly, obtain iron arsenic
Mixture slurry；Low temperature plasma irradiation is carried out to iron arsenic mixture slurry, plasma power supply output voltage is 60KV, in low temperature etc.
Gas ions are stirred and are passed through oxygen to iron arsenic mixture slurry while irradiation, and stirring rate 90rpm stops after 2 hours
Low temperature plasma irradiation, stirring and aeration, obtain plasma treatment slurry；The calcium oxide of above-mentioned weighing and sodium hydroxide are added
Into plasma disposition slurry, it is sufficiently stirred, enters mould, conserve 28 days under room temperature, depanning is to get arsenic refuse lac cure body.
Uniaxial compressive strength detection, the detection of arsenic Leaching, arsenic curing degree calculate with embodiment 1, and test result is shown in Table
2。
2 croci of table, aluminium powder, arsenic mixed-powder mass ratio are to arsenic refuse lac cure body arsenic curing degree and uniaxial compressive
The influence of intensity
As seen from Table 2, when croci, aluminium powder, arsenic mixed-powder mass ratio be less than 5:5:100 (in such as table 2, oxygen
Change iron powder, aluminium powder, arsenic mixed-powder mass ratio=4.5:5:100,3.5:5:100,2.5:5:100,5:4.5:100,5:
It is unlisted lower when 3.5:100,5:2.5:100,4.5:4.5:100,3.5:3.5:100,2.5:2.5:100 and in table 2
Ratio), the ferric ion of iron arsenic mixture slurry incorporation is less, adsorbs high energy electron, hydroperoxyl radical, carbon dioxide free radical
The effect of equal reducing substances is deteriorated, hypotoxicity, low migratory activity pentavalent arsenic be easily reduced into high toxicity again, high migration is lived
Property trivalent arsenic, hydroxyl free radical and ferric ion yield reduces, while in chemolysis, high energy particle impact, microwave
Radiation, impact involve under pyrolysis collective effect, and ionization occurs for aluminium powder and dissociation phenomenon generates poly-aluminium colloid and Polyaluminium iron colloid subtracts
It is few, cause arsenic refuse lac cure body arsenic curing degree to be below 86% and with croci, aluminium powder, arsenic mixed-powder mass ratio
Reduction substantially reduces, and uniaxial compressive strength is below 36Mpa and as croci, aluminium powder, arsenic mixed-powder mass ratio subtract
It substantially reduces less.It (in such as table 2, is aoxidized when croci, aluminium powder, arsenic mixed-powder mass ratio are equal to 5~10:5~10:100
Iron powder, aluminium powder, arsenic mixed-powder mass ratio=5:5:100,5:7.5:100,5:10:100,7.5:5:100,7.5:7.5:
100, when 7.5:10:100,10:5:100,10:7.5:100,10:10:100), the ferric ion of iron arsenic mixture slurry incorporation
The reducing substances such as high energy electron, hydroperoxyl radical, carbon dioxide free radical can effectively be adsorbed and be converted into ferrous ion, thus
Pentavalent arsenic is avoided to be reduced into the trivalent arsenic of low price again；Meanwhile the ferrous ion of generation can be lured with low temperature plasma
The hydrogen peroxide reaction occurred, generates hydroxyl free radical and ferric ion；In chemolysis, high energy particle impact, microwave
Radiation, impact involve under pyrolysis collective effect, and ionization and dissociation phenomenon occur for aluminium powder, generate poly-aluminium colloid；Poly-aluminium colloid and three
Valence iron ion combines, and generates Polyaluminium iron colloid, and Polyaluminium iron colloid can efficiently adsorb pentavalent arsenic, finally, arsenic refuse lac cure
Body arsenic curing degree is above 93%, and uniaxial compressive strength is above 43Mpa.When croci, aluminium powder, arsenic mixed-powder quality
Than be greater than 10:10:100 (in such as table 2, croci, aluminium powder, arsenic mixed-powder mass ratio=10:10.5:100,10:
11.5:100、10:12.5:100、10.5:10:100、11.5:10:100、12.5:10:100、10.5:10.5:100、11.5:
Unlisted more ratios when 11.5:100,12.5:12.5:100 and in table 2), arsenic refuse lac cure body curing degree and single shaft
Compression strength changes unobvious as croci, aluminium powder, arsenic mixed-powder mass ratio increase.Therefore, in terms of comprehensive, in conjunction with
Benefit and cost, when croci, aluminium powder, arsenic mixed-powder mass ratio are equal to 5~10:5~10:100, most beneficial for raising
Arsenic refuse lac cure body arsenic curing degree and uniaxial compressive strength.
Embodiment 3
Calcium oxide, sodium hydroxide, tufa stone powder mass ratio are strong to arsenic refuse lac cure body arsenic curing degree and uniaxial compressive
The influence of degree
By the drying of arsenic slag, grinding, cross 300 meshes, obtain arsenic ground-slag end, according to mass ratio 2.5:1.5:100,3.5:2:100,
4.5:2.5:100、2.5:3:100、3.5:3:100、4.5:3:100、5:1.5:100、5:2:100、5:2.5:100、5:3:
100、5:4.5:100、5:6:100、7.5:3:100、7.5:4.5:100、7.5:6:100、10:3:100、10:4.5:100、10:
6:100、10.5:6:100、11.5:6:100、12.5:6:100、10:6.5:100、10:7:100、10:7.5:100、10.5:
6.5:100,11.5:7:100,12.5:7.5:100 weigh calcium oxide, sodium hydroxide, tufa stone powder respectively；According to mass ratio
2:1 weighs tufa stone powder and arsenic ground-slag end respectively, and mixing stirs evenly, obtains arsenic mixed-powder.According to mass ratio 10:10:
100, croci, aluminium powder, arsenic mixed-powder are weighed respectively, are mixed, are stirred evenly, obtain iron arsenic mixed-powder；It is solid according to liquid
It is mixed than 65:100 (mL:mg) Jiang Shui and iron arsenic mixed-powder, stirs evenly, obtain iron arsenic mixture slurry；To iron arsenic mixture slurry
Low temperature plasma irradiation is carried out, plasma power supply output voltage is 80KV, to iron arsenic while low temperature plasma irradiation
Mixture slurry is stirred and is passed through oxygen, and stirring rate 120rpm stops low temperature plasma irradiation, stirring after 3 hours
And aeration, obtain plasma treatment slurry；The calcium oxide of above-mentioned weighing and sodium hydroxide are added in plasma treatment slurry, filled
Divide stirring, enter mould, conserves 28 days under room temperature, depanning is to get arsenic refuse lac cure body.
Uniaxial compressive strength detection, the detection of arsenic Leaching, arsenic curing degree calculate with embodiment 1, and test result is shown in Table 3.
3 calcium oxide of table, sodium hydroxide, tufa stone powder mass ratio are to arsenic refuse lac cure body arsenic curing degree and uniaxial compressive
The influence of intensity
As seen from Table 3, when calcium oxide, sodium hydroxide, tufa stone powder mass ratio be less than 5:3:100 (in such as table 3, oxygen
Change iron powder, aluminium powder, arsenic mixed-powder mass ratio=5:2.5:100,5:2:100,5:1.5:100,4.5:3:100,3.5:3:
100, more low ratio unlisted when 2.5:3:100,4.5:2.5:100,3.5:2:100,2.5:1.5:100 and in table 3),
Calcium ion is less, alkali-activated carbonatite effect is insufficient, and polymer composite body and calcium ion generation hydration reaction are insufficient, causes arsenic refuse lac solidifying
Solidified body arsenic curing degree is below 89% and as calcium oxide, sodium hydroxide, the reduction of tufa stone powder mass ratio substantially reduces, single
Axis compression strength is below 39Mpa and as calcium oxide, sodium hydroxide, the reduction of tufa stone powder mass ratio substantially reduces.Work as oxygen
Changing calcium, sodium hydroxide, tufa stone powder mass ratio, (in such as table 3, croci, aluminium powder, arsenic are mixed less than 5~10:3~6:100
Close powder quality ratio=5:3:100,5:4.5:100,5:6:100,7.5:3:100,7.5:4.5:100,7.5:6:100,10:3:
100, when 10:4.5:100,10:6:100), alkali-activated carbonatite acts on lower polymer composite body and hydration reaction occurs for calcium ion, generates
Fine and close gelling solidified body, arsenic refuse lac cure body arsenic curing degree are above 96%, and uniaxial compressive strength is above 47Mpa.When
Calcium oxide, sodium hydroxide, tufa stone powder mass ratio be higher than 10:6:100 (in such as table 3, croci, aluminium powder, arsenic mixed powder
Last mass ratio=10.5:6:100,11.5:6:100,12.5:6:100,10:6.5:100,10:7:100,10:7.5:100,
Unlisted more ratios when 10.5:6.5:100,11.5:7:100,12.5:7.5:100 and in table 3), arsenic refuse lac cure
Body curing degree and uniaxial compressive strength change unobvious as calcium oxide, sodium hydroxide, tufa stone powder mass ratio increase.Cause
This, in terms of comprehensive, comprehensive profit and cost, when calcium oxide, sodium hydroxide, tufa stone powder mass ratio are less than 5~10:3~6:
100, most beneficial for raising arsenic refuse lac cure body arsenic curing degree and uniaxial compressive strength.
Claims (10)
1. a kind of processing method of arsenic slag, which is characterized in that mix tufa stone powder and arsenic ground-slag end, obtain arsenic mixed-powder；
Croci, aluminium powder and arsenic ground-slag end are mixed again, obtain iron arsenic mixed-powder；Iron arsenic mixed-powder adds water to stir evenly, and obtains iron arsenic
Mixture slurry；It is stirred and Air Exposure while iron arsenic mixture slurry is carried out low temperature plasma irradiation, obtains plasma
Body handles slurry；Calcium oxide and sodium hydroxide are added in corona treatment slurry, stirs evenly, enters mould, is conserved, demoulding obtains arsenic
Refuse lac cure body.
2. the processing method of arsenic slag according to claim 1, which is characterized in that the tufa stone powder and arsenic ground-slag end
Mass ratio is 1~2.5:1.
3. the processing method of arsenic slag according to claim 2, which is characterized in that the tufa stone powder and arsenic ground-slag end
Mass ratio is 1~2:1.
4. the processing method of arsenic slag according to claim 1, which is characterized in that the croci, aluminium powder, arsenic mixing
The mass ratio of powder is 5~12.5:5~12.5:100.
5. the processing method of arsenic slag according to claim 4, which is characterized in that the croci, aluminium powder, arsenic mixing
The mass ratio of powder is 5~10:5~10:100.
6. the processing method of arsenic slag according to claim 1, which is characterized in that the calcium oxide, sodium hydroxide, tufa stone
The mass ratio of powder is 5~12.5:3~7.5:100.
7. the processing method of arsenic slag according to claim 1, which is characterized in that the calcium oxide, sodium hydroxide, tufa stone
The mass ratio of powder is 5~10:3~6:100.
8. the processing method of arsenic slag according to claim 1, which is characterized in that the liquid of the water and iron arsenic mixed-powder is solid
Than for 55~65:100.
9. the processing method of arsenic slag according to claim 1, which is characterized in that iron arsenic mixture slurry is defeated in 20~80KV
Low temperature plasma irradiation is carried out under voltage out, is stirred with 60~120rpm rate, stops low temperature plasma after 1~3h
Irradiation, stirring and Air Exposure.
10. the processing method of arsenic slag according to claim 1, which is characterized in that the preparation process at the arsenic ground-slag end is,
By arsenic slag drying, grinding, cross 200~400 meshes to get.
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