CN101545038B - Method for producing iron ore concentrate by using poor-tin sulfide ore tailings - Google Patents
Method for producing iron ore concentrate by using poor-tin sulfide ore tailings Download PDFInfo
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Abstract
The invention relates to a method for producing iron ore concentrate by using poor-tin sulfide ore tailings, which comprises the following steps: producing No.1 sulfide concentrate by performing magnetic separation on the poor-tin tin sulfide ore tailings; and producing No.2 sulfide concentrate through ore grinding and floatation of magnetic separation tailings; and performing oxidizing roasting desulphurization, acid cleaning and water cleaning treatment on the sulfide concentrates to remove impurities so as to obtain the iron ore concentrate. The iron grade of the iron ore concentrate is between 56.24 and 60.13 percent, and the content of harmful elements also accords with the index requirement of the finished product of the iron ore concentrate. Roasting fumes can be applied to preparing sulfuric acid subjected to dust precipitation. The method achieves the aims of effectively using ferrous metals and sulfur elements in the poor-tin tin sulfide ore tailings, saving resources and energy sources, reducing environmental pollution and comprehensively recycling associated metals.
Description
One. affiliated technical field:
The present invention relates to the method that the poor tin sulfide ore tailings of a kind of usefulness is produced iron ore concentrate, belong to the selecting smelting combination processing technology field.
Two. background technology:
Known, the tin concentrate overwhelming majority of Sheng Chaning originates from the cassiterite mineral deposit in the world, and the traditional ore-dressing technique of tin ore is gravity concentration.Along with the long-term development and use of human society to the tin ore resource, cassiterite granularity in the milling ore constantly attenuates, again since in tin mineral often association various ferric oxide mineral and iron sulfide mineral are arranged, thereby develop technologies such as cassiterite floatation process and selective flocculation; And magnetic concentration working has often appearred in the tin ore beneficiation flowsheet, its main purpose is for separation of iron and tin.
Yang Qimin is in being published in " Yunlong tin ore mine tailing is recycled production practice " literary composition of non-ferrous metal (ore dressing part) the 6th phase in 1996, state, Dali mining and metallurgy institute and institute of cloud tin company have been reported, adopt gravity treatment one flotation flowsheet, the multi-metal sulfide milltailings of handling Yunlong tin ore reclaims the beneficiation test again and the condition of production of tin and sulphur.The mine tailing raw material contains Sn 0.45%～0.49%, and S 1.88%, and As 0.10%; Test technology is earlier with gravity treatment enrichment tin and sulphur, output rough concentrate; Through flotation separation sulphur, obtain tin concentrate, rich chats and sulphur concentrate again.The technical indicator that obtains is: tin concentrate grade Sn 43.97%～61.68%, contain S 0.51%～0.88%, and As 0.14～0.25%, the tin rate of recovery 49.45%～67.42%; Rich chats grade Sn 8.29～12.18%, the tin rate of recovery 7.9%～9.89%; Sulphur concentrate grade 39.23%～48.04%, the rate of recovery 17.96%～30.00%.Technological transformation is by gravity treatment-flotation open circuit flow scheme design.The productive capacity that obtains is: total mine tailing contained Sn 0.326% during the dressing-works produced, wherein-sludge of 0.074mm grade contains Sn 0.519%, through gravity treatment-flotation output tin grade 56.266%, contain S 0.742%, As 0.223%, the tin concentrate of the tin rate of recovery 68.3%, and sulphur grade 47.48% contain the sulphur concentrate of Sn 0.233%, As 4.63%.But since the sulphur concentrate to contain arsenic too high, also not development and use.
At patent No. ZL200610010617.7, name is called in " method that reclaims valuable mineral in the stannum-contained multi-metal sulphide ore milltailings " patent documentation, the contriver has the characteristic of sulphide ores stannum-contained multi-metal at the mine tailing raw material, adopt the split pole tailings discarding by preconcentration, the flotation of fine grinding material and the multistage combination of multistage-gravity treatment combined mineral dressing technology, handling the major ingredient weight percentage is (%): Sn 0.3～0.57, Pb 0.27～0.4, Sb 0.15～0.21, Zn 2.44～3.27, S 5.7～9.53, the tailing raw material of As 0.87～1.24 comprehensively reclaims tin and associated metal and element sulphur; The technical indicator that obtains is respectively: tin concentrate grade 41.86～43.72%, the tin rate of recovery 52.28%～56.87%; Lead-antimony concentrate grade Pb+Sb 48.53%～50.52%, lead recovery 44.76%～46.17%; Zinc ore concentrate grade 45.96%～50.27%, zinc recovery 52%～53.09%; Sulphur concentrate grade 36.17%～36.89, the rate of recovery 52.05%～54.10%; Arsenic concentrate grade 35.38%～36.18%, the arsenic rate of recovery 53.92%～56.80%.
Three. summary of the invention
The purpose of this invention is to provide the method that the poor tin sulfuration of a kind of usefulness tin ore mine tailing is produced iron ore concentrate.Poor tin sulfuration tin ore tail is through No. 1 vulcanised ore concentrate of magnetic separation output; Magnetic tailing is through ore grinding and flotation, No. 2 vulcanised ore concentrates of output; Vulcanised ore concentrate is again through the oxidizing roasting desulfurization, and pickling and washing obtain iron ore concentrate after handling and removing impurity, iron ore concentrate iron grade 56.24%～60.13%, and the content of harmful element is the index request of basic symbols synthetics iron ore concentrate also; Baking flue gas can be used for making sulfuric acid after dedusting.Reach the ferrous metal and the element sulphur that effectively utilize in the poor tin sulfuration tin ore mine tailing, save the resource and the energy, reduce the purpose of environment and associated metal comprehensive utilization.
The present invention finishes by following technical scheme
Raw material is poor tin sulfuration tin ore mine tailing, comprises tailing and tailing, and raw material main chemical mass percent is listed in table 1.
The poor tin sulfuration of table 1 tin ore mine tailing main chemical mass percent (quality %)
1. raw materials pretreatment:
1) raw material, enters the secondary magnetic separation machine and carries out dry type magnetic separation after the drying through fragmentation, obtains No. 1 vulcanised ore concentrate and magnetic tailing; Described raw material crushing is dried to water content and accounts for below 6% of material quantity to granularity≤1mm, and the secondary magnetic separation machine that enters magneticstrength and be 2000 gaussian sums, 8000 Gausses carries out dry type magnetic separation; No. 1 vulcanised ore concentrate productive rate 40.46～47.46%; Major ingredient (quality %) is Fe 38.41～40.38; Cu 0.54～0.746, and S 15.25～16.21, and As 1.86, and recovery rate in ore-dressing is respectively Fe 48.73%～54.96%, and Cu 30.39%～31.59%, and S 42.18%～59.93%, and As 37.97%;
2) magnetic tailing is mixed with the ore pulp of mass concentration 23～26% through being finely ground to granularity≤0.125mm, enters flotation, at first adds 200g/t～300g/t sodium sulphite the oxide mineral in the material is vulcanized, and stirs 3～5min; Adding sodium hydroxide adjustment slurry pH is 8.5～9.5, stirs 3～5min; The trapping agent butyl xanthate 160～180g/t that adds iron, copper mine stirs 3～5min; Add No. 2 oil 80～100g/t again and make pore forming material, stir 3～5min; Open charging valve, draw together bubble 7～10min, obtain No. 2 vulcanised ore concentrates and flotation tailings.In magnetic tailing, No. 2 vulcanised ore concentrate productive rates 38.23%～49.93%, major ingredient (quality %) is: Fe 35.39～42.11, and Cu 1.48～2.77, and S 20.11～26.54; Flotation recovery rate is: Fe 58.39%～68.14%, and Cu 59.08%～90.42%, S67.18%～90.58%.Flotation tailings major ingredient (quality %) is: Fe 12.51～26.31, and Cu 0.27～0.34, and S 2.60～8.02.
Add up to No. 1 and No. 2 vulcanised ore concentrates, expect vulcanised ore concentrate, the ore dressing total yield 81.02%～96.16% of elementary sulfur from mine tailing is former; Calculate by this index, the poor tin sulfuration of every processing 100t tin ore mine tailing raw material, the elementary sulfur (quality) that is selected into vulcanised ore concentrate can reach 11.96～12.60t.
2. oxidizing roasting desulfurization
No. 1 and No. 2 vulcanised ore concentrates are carried out oxidizing roasting respectively under 900～960 ℃ of temperature, with air oxidant, the air capacity that control feeds is 3800～4100L/kg material, and roasting time 1～2 hour makes the iron sulfide mineral oxidation more than 95% in the material, is converted into Fe
2O
3Or Fe
3O
4State, sulphur is with SO
2The form volatilization, and make dehydration of ferric oxide mineral and decomposition, obtain respectively No. 1 and No. 2 calcinings.No. 1 calcining productive rate 72.95%～78.26%, desulfurization degree 94.92%～96.22%; No. 2 calcining productive rates 75.21%～76.40%, desulfurization degree 94.71%～96.31%.
Oxidizing reaction principle according to sulfurous iron ore: 4FeS
2+ 110
2=2Fe
2O
3+ 8SO
2+ 815.2Kcal; The oxidizing reaction of sulfurous iron ore is thermopositive reaction, and liberated heat is about 1700Kcal/kg, is equivalent to the thermal value of 0.3kg standard fire coal.Therefore, under commercial production scale, take to replenish high sulfide pyrite and join the ore deposit roasting, or utilize the waste heat preheated air of baking flue gas to carry out effective measure such as hot blast roasting, then the oxidizing roasting operation might self-heating be carried out; And SO in the baking flue gas
2The concentration height after dedusting, can be used for making sulfuric acid, and associated metal such as a part volatile plumbous antimony etc. can obtain reclaiming in flue dust.Two kinds of vulcanised ore concentrates are added up to, and get SO in the baking flue gas
2Effectively transformation efficiency is 85%, then every processing 100t mine tailing raw material, but by-product sulfuric acid 30～31t.
3. calcining pickling
With calcining by calcining: water (Gu: liquid) weight ratio=1: 1.5～2.5 add water, and pulp under normal temperature and agitation condition is that the technical hydrochloric acid of 31 quality % carries out pickling, 1～2 hour time, pH≤1.0 of washing lotion during the washing terminal point with concentration; Obtain pickle solution and pickling iron ore after the solid-liquid separation, the pickling iron ore washs to elutant with clear water and is neutral, promptly obtains No. 1 and No. 2 finished iron concentrate.
Described calcining and technical hydrochloric acid mass ratio are:
No. 1 calcining: technical hydrochloric acid=100: 8～100: 10
No. 2 calcinings: technical hydrochloric acid=100: 10～100: 12
No. 1 and No. 2 finished iron concentrate are added up to, expect finished iron concentrate, productive rate 42.22%～46.50% from poor tin sulfuration tin ore mine tailing is former; Iron ore concentrate iron grade 56.24%～60.13%, detrimental impurity constituent content also meet the index request of national regulation substantially; The metallic iron rate of recovery 78.63%～80.46%.
4. processing wastewater is handled
The calcining pickling, the pickle solution after the solid-liquid separation is handled through heavy plumbous arsenic, and the copper arsenic slag that obtains obtains copper ore concentrates after the normal temperature dearsenification.After waste liquid that heavy copper mother liquor, technological process produce and wash water compile, adopt the condition of three grades of lime neutralizing hydrolysis precipitator method to administer, making purifies water reaches the requirement of secondary standard.
5. secondary milltailings slag is administered
The secondary mine tailing of this technology ore-dressing practice output, selecting for use has been that the practicable backfill scheme of reclaiming is administered for facts have proved of Gejiu region, to reach the purpose of repairing ecotope.
Advantage and positively effect that the present invention and technique known exist.
1) the present invention is a raw material with rich ferruginous poor tin sulfuration tin ore mine tailing, adopts the selecting smelting combination treatment technology, obtains iron extract mine producation by magnetic separation and flotation, oxidizing roasting and cleanup acid treatment, flow process is brief, metallic iron and association sulphur direct yield height, tooling cost is low, is easy to industrial applications.
2) the present invention is under technical scale, and vulcanised ore concentrate oxidizing roasting operation might self-heating be carried out, and all the other processing steps are operation at normal temperatures and pressures all, helps saving the energy, reduces consumption.
3) the SO 2 from fume concentration height of vulcanised ore concentrate oxidizing roasting process generation of the present invention can be used for making sulfuric acid after dust removal process.Simultaneously, associated metals such as a part of volatile lead, antimony can obtain reclaiming in flue dust.
4) the present invention adopts Sodium Sulphide selective precipitation method and three grades of lime neutralizing hydrolysis precipitator method to administer pickle solution and wash water, both can comprehensively reclaim the copper in the solution, obtain higher-grade copper ore concentrates (Cu 32.74～54.65%), guaranteeing again purifies water reaches the requirement of industry " integrated wastewater discharge standard " GB8978-1996 secondary standard.
5) the present invention selects the scheme improvement secondary milltailings slag that backfill is reclaimed for use, is practicable method for facts have proved of Gejiu region, helps the reparation of ecotope.
Four. description of drawings:
Fig. 1 is technical process of the present invention:
Five. embodiment
Embodiment 1: raw material is No. 1 poor tin sulfuration tin ore mine tailing in the table 1, and the main chemical mass percent is (quality %): Fe 30.96, and Cu 0.69, and Pb 0.005, and Zn 0.18, and Sn 0.13, and S 15.55, and P 0.011, and As 3.05.
(1) raw material is dewatered to 6 quality %, be finely ground to granularity and pulverize material less than 1mm.
(2) pulverize material and carry out 1 section dry type magnetic separation, obtain No. 1 vulcanised ore concentrate and magnetic tailing with the secondary magnetic separation machine that magneticstrength is respectively 2000 gaussian sums, 8000 Gausses.No. 1 vulcanised ore concentrate productive rate 40.46%, major ingredient (quality %) is: Fe 38.41, and Cu 0.54, and S 16.21; Recovery rate in ore-dressing is Fe 50.19%, and Cu 31.59%, and S 42.18%; Magnetic tailing major ingredient (quality %) is Fe 25.89, and Cu 0.79, and S 15.10.
(3) magnetic tailing is finely ground to granularity≤0.125mm, is mixed with mass concentration 25% ore pulp, enter flotation, add 220g/t sodium sulphite earlier, stir 3min; Add sodium hydroxide pH values of pulp is adjusted to 8.5～9.0, stir 5min; The trapping agent butyl xanthate 160g/t that adds iron, copper mine stirs 5min; Add oily 80g/t again No. 2, stir 3min; Open charging valve, draw together bubble 7min, obtain No. 2 vulcanised ore concentrates and flotation tailings.In magnetic tailing, No. 2 vulcanised ore concentrate productive rates 38.23%, major ingredient (quality %) is Fe 42.11, and Cu 1.61, and S 26.54; The flotation operation rate of recovery: Fe 62.15%, Cu 77.54%, and S 67.18%; Flotation tailings major ingredient (quality %) Fe 15.84%, Cu 0.28, and S 8.02.
Add up to No. 1 and No. 2 vulcanised ore concentrates, expect vulcanised ore concentrate, elementary sulfur ore dressing total yield 81.02% from mine tailing is former; Calculate by this index, No. 1 mine tailing raw material of every processing 100t, the elementary sulfur (quality) that is selected into vulcanised ore concentrate is 12.60t.
(4) No. 1 and No. 2 vulcanised ore concentrates are carried out oxidizing roasting respectively at 900 ℃ of temperature.With air oxidant, air capacity all infeeds in the stove by the metering of 3900～4100L/kg material, during roasting time 2h, obtains respectively No. 1 and No. 2 calcinings.No. 1 calcining productive rate 72.95%, calcining contains S 0.84%, desulfurization degree 96.22%; No. 2 calcining productive rates 76.4%%, calcining contains S 1.28%, desulfurization degree 96.31%.
(5) with No. 1 and No. 2 calcinings respectively by calcining: water weight ratio (Gu: liquid)=add water slurryization at 1: 2, stirring and pickling is 1.5 hours under normal temperature, and calcining and technical hydrochloric acid mass ratio are respectively by 100; 10 and metering in 100: 12, add the hydrochloric acid of concentration 31 quality %, pH value of solution during terminal point≤1.0 are filtered back pickling iron ore and are washed to elutant with tap water and be neutral, obtain respectively after the oven dry No. 1 and No. 2 iron ore concentrates.Expect iron ore concentrate from No. 1 poor tin sulfuration tin ore mine tailing is former, No. 1 iron ore concentrate productive rate 26.76%, major ingredient (quality %): Fe 56.24, and S 0.102, and P 0.12, and Pb 0.083, and As 00.093, the metallic iron rate of recovery 48.61%; No. 2 iron ore concentrate productive rates 15.46%, major ingredient (quality %): Fe 60.13, and S 0.058, and P 0.084, and Pb 0.243, and As 0.128, the metallic iron rate of recovery 30.52%.
No. 1 and No. 2 iron ore concentrates are added up to, then expect product iron concentrate, productive rate 42.22%, iron grade 56.24%～60.13%, the metallic iron rate of recovery 79.13% from No. 1 mine tailing is former.
Embodiment 2: raw material is No. 2 poor tin sulfuration tin ore mine tailings in the table 1, and the main chemical mass percent is (quality %): Fe 33.415, and Cu 1.02, and Pb 0.116, and Zn 0.32, and Sn 0.18, and S 12.66, and P 0.135, and As 2.17.
(1) raw material is dewatered to 6 quality %.Be finely ground to granularity and pulverize material less than 1mm.
(2) pulverizing material is that 2000 gaussian sums, 8000 Gausses' secondary magnetic separation machine carries out 1 section dry type magnetic separation with magneticstrength, obtains No. 1 vulcanised ore concentrate and magnetic tailing.No. 1 vulcanised ore concentrate productive rate 41.51%, major ingredient (quality %) is: Fe 39.23, and S 15.25, and Cu 0.746; The rate of recovery is: Fe 48.73%, and Cu 30.39%, and S 50.00%.Magnetic tailing major ingredient (quality %) is: Fe 28.70, and Cu 1.20, and S 10.64.
(3) the magnetic tailing ore pulp that is finely ground to granularity-0.125mm enters flotation, adds 250g/t sodium sulphite earlier, stirs 5min; Add sodium hydroxide pH values of pulp is adjusted to 8.5～9.0, stir 5min; Add butyl xanthate 170g/t, stir 5min, add oily 90g/t again No. 2, stir 4min, open charging valve and draw together bubble 8min, obtain No. 2 vulcanised ore concentrates and flotation tailings.In magnetic tailing, No. 2 vulcanised ore concentrate productive rates 47.93%, major ingredient (quality %) is Fe 40.80, and Cu 1.48, and S 20.11, and As 2.43; Flotation recovery rate Fe 68.14%, Cu 59.08%, and S 90.58%; Flotation tailings major ingredient (quality %) is: Fe 12.51, and Cu 0.34, and S 2.60.
With No. 1 and No. 2 vulcanised ore concentrates totals, elementary sulfur ore dressing total yield 94.52%, No. 2 mine tailing raw materials of promptly every processing 100t, the elementary sulfur (quality) that enters vulcanised ore concentrate is 11.96t.
(4) with No. 1 and No. 2 vulcanised ore concentrates in 960 ℃ of temperature selective oxidation roasting 1.5 hours, air capacity is all supplied with by the metering of 3800L/kg material, obtains respectively No. 1 and No. 2 calcinings.No. 1 calcining productive rate 71.66% contains S 1.08%, desulfurization degree 94.92%; No. 2 calcining productive rates 75.42% contain S 1.41%, desulfurization degree 94.71%.
(5) with No. 1 and No. 2 calcining water pulps respectively, stirring and pickling is 1.5 hours under normal temperature, calcining and technical hydrochloric acid mass ratio are respectively by 100: 8 and metering in 100: 12, the hydrochloric acid that adds concentration 31 quality %, pH value of solution during terminal point≤1.0, filter back pickling iron ore and be neutral, obtain No. 1 iron ore concentrate and No. 2 iron ore concentrates after the oven dry respectively with tap water drip washing to elutant.Expect iron ore concentrate from No. 2 poor tin sulfuration tin ore mine tailings are former: No. 1 iron ore concentrate productive rate 27.74%, iron ore concentrate major ingredient (quality %) is: Fe 56.91, and S 0.266, and P 0.12, and Pb 0.11, and As 0.106, the metallic iron rate of recovery 47.27%; No. 2 iron ore concentrate productive rates 18.36%, iron ore concentrate main component (quality %); Fe 60.02, and S 0.058, and P 0.124, and Pb 0.105, and As 0.23, the metallic iron rate of recovery 33.19%.
No. 1, No. 2 iron ore concentrates are added up to, from 2
#Mine tailing is former expects product iron concentrate, productive rate 46.10%, iron grade 56.91%～60.02%, the metallic iron rate of recovery 80.46%.
Embodiment 3: raw material is No. 3 poor tin sulfuration tin ore mine tailings in the table 1, and the main chemical mass percent is (quality %): Fe 34.87, and Cu 1.04, and Pb 0.138, and Zn 0.64, and Sn 0.16, and S 12.71, and P 0.336, and As 1.20.
(1) with raw material through being finely ground to granularity≤1mm, dehydration is after below the 6 quality %, the secondary magnetic separation machine that enters magneticstrength and be 2000 gaussian sums, 8000 Gausses carries out dry type magnetic separation, obtains No. 1 vulcanised ore concentrate and magnetic tailing.No. 1 vulcanised ore concentrate productive rate 47.46%, major ingredient are (quality %): Fe 40.38, and S 16.05, and As 1.86; The rate of recovery is Fe 54.96%, and S 59.93%, and As 37.97%.The magnetic tailing major ingredient is (quality %): Fe 30.26%, and Cu 1.41%, and S 12.16%.
(2) the magnetic concentration ore pulp that is finely ground to granularity-0.125mm enters flotation, adds 280g/t sodium sulphite, stirs 3～5min; Add sodium hydroxide pH values of pulp is adjusted to 9.0～9.5, stir 3min; Add butyl xanthate 180g/t, stir 5min; Add No. 2 oily 100g/t, stir 4min, open charging valve, draw together bubble 7min, obtain No. 2 vulcanised ore concentrates and flotation tailings.In magnetic tailing, No. 2 vulcanised ore concentrate productive rates 49.93%, major ingredient (quality %) is Fe 35.39, and Cu 2.77, and S 20.69; The rate of recovery is Fe 58.39%, and Cu 90.42%, and S 84.87%; Flotation tailings major ingredient (quality %) is: Fe 26.31, and Cu 0.27, and S 3.65.
With No. 1 and No. 2 vulcanised ore concentrates totals, the ore dressing total yield of elementary sulfur is 96.16%, No. 3 mine tailing raw materials of promptly every processing 100t, and the elementary sulfur (quality) that is selected into vulcanised ore concentrate is 12.22t.
(3) with No. 1 and No. 2 vulcanised ore concentrates in 950 ℃ of temperature selective oxidation roasting 1.5 hours, air capacity is all supplied with by the metering of 4100L/kg material, obtains respectively No. 1 and No. 2 calcinings.No. 1 calcining productive rate 78.26% contains S 0.98%, desulfurization degree 95.21%; No. 2 calcining productive rates 75.21% contain S 1.27%, desulfurization degree 95.38%.
(4) with No. 1 calcining and No. 2 calcining water pulps respectively, stirring and pickling is 1.5 hours under normal temperature, calcining and technical hydrochloric acid mass ratio are respectively by 100: 9 and metering in 100: 10, adding concentration is the hydrochloric acid of 31 quality %, dark liquid pH≤1.0 during terminal point, filter back pickling iron ore and be neutral with tap water drip washing to elutant, and oven dry, obtain No. 1 iron ore concentrate and No. 2 iron ore concentrates respectively, expect iron ore concentrate from No. 3 poor tin sulfuration tin ore mine tailings are former: No. 1 iron ore concentrate productive rate 31.23%, iron ore concentrate major ingredient (quality %) is: Fe 59.16, S 0.21, and P 0.104, and Pb 0.124, As 0.16, the metallic iron rate of recovery 52.99%; No. 2 iron ore concentrate productive rates 15.27%, major ingredient (quality %) is: Fe 58.53, and S 0.058, and P 0.136, and Pb 0.108, and As 0.223, the metallic iron rate of recovery 25.64%.
No. 1 and No. 2 iron ore concentrates are added up to, then expect product iron concentrate, productive rate 46.50%, iron grade 58.53%～59.16%, the metallic iron rate of recovery 78.63% from No. 3 poor tin sulfuration tin ore mine tailings are former.
Claims (4)
1. method of producing iron ore concentrate with poor tin sulfide ore tailings, it is characterized in that: it is finished according to the following steps,
1). raw materials pretreatment
(1) raw material, enters the secondary magnetic separation machine and carries out dry type magnetic separation after the drying through fragmentation, obtains No. 1 vulcanised ore concentrate and magnetic tailing;
(2) magnetic tailing is mixed with the ore pulp of mass concentration 23～26% through being finely ground to granularity≤0.125mm, enters flotation, at first adds 200g/t～300g/t sodium sulphite the oxide mineral in the material is vulcanized, and stirs 3～5min; Adding sodium hydroxide adjustment slurry pH is 8.5～9.5, stirs 3～5min; The trapping agent butyl xanthate 160～180g/t that adds iron, copper mine stirs 3～5min; Add No. 2 oil 80～100g/t again and make pore forming material, stir 3～5min; Open charging valve, draw together bubble 7～10min, obtain No. 2 vulcanised ore concentrates and flotation tailings;
2). the oxidizing roasting desulfurization
No. 1 and No. 2 vulcanised ore concentrates are carried out oxidizing roasting respectively under 900～960 ℃ of temperature, with air oxidant, the air capacity that control feeds is 3800～4100L/kg material, and roasting time 1～2 hour makes the iron sulfide mineral oxidation more than 95% in the material, is converted into Fe
2O
3Or Fe
3O
4State, sulphur is with SO
2The form volatilization, and make dehydration of ferric oxide mineral and decomposition, obtain respectively No. 1 and No. 2 calcinings;
3). the calcining pickling
With calcining by calcining: water weight ratio=1: 1.5～2.5 add water, and pulp under normal temperature and agitation condition is that the technical hydrochloric acid of 31 quality % carries out pickling, 1～2 hour time, pH≤1.0 of washing lotion during the washing terminal point with concentration; Obtain pickle solution and pickling iron ore after the solid-liquid separation, the pickling iron ore washs to elutant with clear water and is neutral, promptly obtains No. 1 and No. 2 finished iron concentrate; In the described calcining pickling, calcining and technical hydrochloric acid mass ratio are: No. 1 calcining: technical hydrochloric acid=100: 8～100: 10; No. 2 calcinings: technical hydrochloric acid=100: 10～100: 12;
The waste liquid that process produces and wash water compiles after the wastewater treatment qualified discharge; The secondary milltailings is handled through administering.
2. the method that the poor tin sulfuration of usefulness according to claim 1 tin ore mine tailing is produced iron ore concentrate, it is characterized in that: described raw material crushing is to granularity≤1mm, be dried to water content and account for below 6% of material quantity, the secondary magnetic separation machine that enters magneticstrength and be 2000 gaussian sums, 8000 Gausses carries out dry type magnetic separation.
3. the method that the poor tin of usefulness according to claim 1 sulfuration tin ore mine tailing is produced iron ore concentrate is characterized in that: after waste liquid that technological process produces and wash water compile, adopts three grades of lime neutralizing hydrolysis precipitator method improvement, making purifies water reaches the requirement of secondary standard.
4. the method that the poor tin sulfuration of usefulness according to claim 1 tin ore mine tailing is produced iron ore concentrate, it is characterized in that: it is with the secondary mine tailing of this technology ore-dressing practice output that described secondary milltailings is administered, and administers with the backfill reclamation method.
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| CN101792867B (en) * | 2009-11-16 | 2012-07-18 | 云南锡业集团（控股）有限责任公司 | Combined flow treatment method of tin rough concentrate |
| CN104152718B (en) * | 2014-07-21 | 2015-10-21 | 中南大学 | A kind of method of stanniferous iron tailings separated in synchronization tin and iron |
| CN104907570B (en) * | 2015-06-04 | 2018-04-24 | 中国科学院过程工程研究所 | A kind of preparation method of powder used in metallurgy reduced iron powder |
| CN107570107B (en) * | 2017-10-25 | 2019-12-17 | 中南大学 | Composite material with reticular porous structure and preparation method and application thereof |
| CN112892847B (en) * | 2020-12-24 | 2022-09-27 | 内蒙古黄岗矿业有限责任公司 | Beneficiation process for preparing high-purity iron ore concentrate by reducing impurities in cassiterite dyeing type iron ore |
| CN113713964A (en) * | 2021-07-29 | 2021-11-30 | 四川谨而睿科技有限公司 | Method for recovering titanium concentrate from hypo-iron ore in titanomagnetite recovery process |
| CN115350811B (en) * | 2022-09-08 | 2024-04-12 | 昆明理工大学 | Method for comprehensively recovering lean tin tailings by magnetic gravity combination |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1799698A (en) * | 2006-01-09 | 2006-07-12 | 昆明理工大学 | Method for reclaiming valuable mineral from concentrated tailings of stannum-contained multi-metal sulphide ore |
| RU2307710C2 (en) * | 2004-07-20 | 2007-10-10 | Марат Азатович Бикбов | Method of concentration of the iron ores |
| CN101125311A (en) * | 2007-09-24 | 2008-02-20 | 昆明理工大学 | Vulcanizing-flotation combing method for treating zinc kiln slag |
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2009
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2307710C2 (en) * | 2004-07-20 | 2007-10-10 | Марат Азатович Бикбов | Method of concentration of the iron ores |
| CN1799698A (en) * | 2006-01-09 | 2006-07-12 | 昆明理工大学 | Method for reclaiming valuable mineral from concentrated tailings of stannum-contained multi-metal sulphide ore |
| CN101125311A (en) * | 2007-09-24 | 2008-02-20 | 昆明理工大学 | Vulcanizing-flotation combing method for treating zinc kiln slag |
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