CN103173627A - Method for promoting separation of valuable metals and calcic gangue minerals in waste residue - Google Patents
Method for promoting separation of valuable metals and calcic gangue minerals in waste residue Download PDFInfo
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- CN103173627A CN103173627A CN2013101261536A CN201310126153A CN103173627A CN 103173627 A CN103173627 A CN 103173627A CN 2013101261536 A CN2013101261536 A CN 2013101261536A CN 201310126153 A CN201310126153 A CN 201310126153A CN 103173627 A CN103173627 A CN 103173627A
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- waste residue
- calcium
- calcic
- terra alba
- hydrating
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- 239000002699 waste material Substances 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 38
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 20
- 239000002184 metal Substances 0.000 title claims abstract description 20
- 229910052500 inorganic mineral Inorganic materials 0.000 title claims abstract description 15
- 239000011707 mineral Substances 0.000 title claims abstract description 15
- 150000002739 metals Chemical class 0.000 title claims abstract description 7
- 238000000926 separation method Methods 0.000 title abstract description 5
- 230000001737 promoting effect Effects 0.000 title abstract 2
- 239000013078 crystal Substances 0.000 claims abstract description 27
- 238000003756 stirring Methods 0.000 claims abstract description 10
- 239000000126 substance Substances 0.000 claims abstract description 10
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000011575 calcium Substances 0.000 claims abstract description 7
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 7
- 239000000654 additive Substances 0.000 claims abstract description 5
- 230000000996 additive effect Effects 0.000 claims abstract description 5
- 239000007787 solid Substances 0.000 claims abstract description 4
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims description 36
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 17
- 229910052725 zinc Inorganic materials 0.000 claims description 17
- 239000011701 zinc Substances 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 14
- 238000005188 flotation Methods 0.000 claims description 12
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 239000010949 copper Substances 0.000 claims description 5
- 239000011133 lead Substances 0.000 claims description 5
- 238000012216 screening Methods 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 4
- 239000005864 Sulphur Substances 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 239000002893 slag Substances 0.000 claims description 4
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 4
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 claims description 4
- 235000011152 sodium sulphate Nutrition 0.000 claims description 4
- 238000010792 warming Methods 0.000 claims description 4
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052737 gold Inorganic materials 0.000 claims description 3
- 239000010931 gold Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 229910052709 silver Inorganic materials 0.000 claims description 3
- 239000004332 silver Substances 0.000 claims description 3
- 208000006558 Dental Calculus Diseases 0.000 claims description 2
- DPDMMXDBJGCCQC-UHFFFAOYSA-N [Na].[Cl] Chemical compound [Na].[Cl] DPDMMXDBJGCCQC-UHFFFAOYSA-N 0.000 claims description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 2
- 239000000920 calcium hydroxide Substances 0.000 claims description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 2
- 239000000428 dust Substances 0.000 claims description 2
- 239000012530 fluid Substances 0.000 claims description 2
- 239000011499 joint compound Substances 0.000 claims description 2
- 238000002844 melting Methods 0.000 claims description 2
- 230000008018 melting Effects 0.000 claims description 2
- 229910021645 metal ion Inorganic materials 0.000 claims description 2
- 238000005272 metallurgy Methods 0.000 claims description 2
- 235000010265 sodium sulphite Nutrition 0.000 claims description 2
- 239000002910 solid waste Substances 0.000 claims description 2
- 230000033228 biological regulation Effects 0.000 abstract description 19
- 238000005516 engineering process Methods 0.000 abstract description 9
- 230000004913 activation Effects 0.000 abstract description 2
- 230000032683 aging Effects 0.000 abstract description 2
- 230000000887 hydrating effect Effects 0.000 abstract 4
- 229940095564 anhydrous calcium sulfate Drugs 0.000 abstract 2
- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 abstract 2
- 230000003213 activating effect Effects 0.000 abstract 1
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 235000011132 calcium sulphate Nutrition 0.000 description 9
- 239000012141 concentrate Substances 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 238000011084 recovery Methods 0.000 description 6
- 229910001385 heavy metal Inorganic materials 0.000 description 5
- 150000001875 compounds Chemical group 0.000 description 4
- 238000002425 crystallisation Methods 0.000 description 4
- 230000008025 crystallization Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000003723 Smelting Methods 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 238000007885 magnetic separation Methods 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000001175 calcium sulphate Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 235000002918 Fraxinus excelsior Nutrition 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 239000005083 Zinc sulfide Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000001994 activation Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010494 dissociation reaction Methods 0.000 description 1
- 230000005593 dissociations Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- -1 filter Substances 0.000 description 1
- 239000000796 flavoring agent Substances 0.000 description 1
- 235000019634 flavors Nutrition 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 238000003895 groundwater pollution Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 238000009854 hydrometallurgy Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910000765 intermetallic Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 239000006148 magnetic separator Substances 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 239000010814 metallic waste Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 238000005201 scrubbing Methods 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- PUZPDOWCWNUUKD-UHFFFAOYSA-M sodium fluoride Chemical compound [F-].[Na+] PUZPDOWCWNUUKD-UHFFFAOYSA-M 0.000 description 1
- 239000002689 soil Substances 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
- 238000003860 storage Methods 0.000 description 1
- 238000005987 sulfurization reaction Methods 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 238000007725 thermal activation Methods 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
- DRDVZXDWVBGGMH-UHFFFAOYSA-N zinc;sulfide Chemical compound [S-2].[Zn+2] DRDVZXDWVBGGMH-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention discloses a method for promoting separation of valuable metals and calcic gangue minerals in waste residue. The method comprises the following steps of: based on calcic waste residue as a treatment object, first, generating anhydrous calcium sulfate crystals by calcic gangue minerals in waste residue through hydrothermal activation; then, through hydrating and crystallizing regulation, hydrating anhydrous calcium sulfate crystals to calcium sulphate dihydrate crystals and enabling the calcium sulphate dihydrate crystals to grow to hundreds of microns; and then, separating the crystals and other substances by a physical separating method. The hydrothermal activating technology comprises the following steps of: adding an additive; and controlling hydrothermal temperature, hydrothermal time, stirring speed and liquid-solid ratio. The hydrating regulation technology comprises the following steps of: adding an excitant, controlling hydrating time, adding crystal seeds, controlling aging time and the like. According to the method provided by the invention, calcium and other valuable metals in waste residue can be recycled at the same time, so that the method is beneficial to realizing reduction, harmlessness and reclamation of waste residue.
Description
Technical field
The invention belongs to field of environment engineering, relate to a kind of method that hydro-thermal activation-aquation crystallization promotes that in waste residue, valuable metal separates with the calcic gangue mineral.
Background technology
The air storage of waste residue, not only take the land resources of a large amount of preciousnesses, destroy landforms and vegetation, and owing to being subjected to for a long time wind, Exposure to Sunlight, drenching with rain, objectionable constituent can constantly be oozed out, and water system and soil around surface water or groundwater pollution hinder the development and growth of root system of plant, but also can put aside in plant organism, jeopardize HUMAN HEALTH by food chain.On the other hand, contain many other useful components in waste residue, as gold and silver, copper, lead, zinc etc., can be used as the secondary resource exploitation.Therefore, be no matter from the angle of protection of the environment or from the angle of reserved resource, all should make great efforts to seek technical feasible, reasonable in economy heavy metal waste slag improvement and utilize measure.
Metal in waste residue exists mainly with compound form greatly, often is combined closely with gangue mineral, is difficult to monomer dissociation, causes its difficult separation and recycling.The technique of preparing that the method for separating with gangue mineral for metal at present, mainly contains wet process smelting technique, pyrometallurgical smelting technology and comprises flotation, gravity treatment, magnetic separation etc.The poor selectivity of hydrometallurgy to metal wherein, consumption acid consumption alkali is high, also can produce a large amount of leached muds, and residual in leached mud a considerable amount of solvable condition heavy metals is arranged, and the risk that produces environmental pollution is very big.The pyrometallurgical smelting investment is large, energy consumption is high, technique is comparatively complicated, there are villaumite and the villiaumite of severe corrosive in production process, production unit requires high, and environmental pollution is more serious, can produce the secondary pollutants such as reluctant kiln slag, and the equipment of needs collection ashes and flue etc., these problems have limited its application aspect controlling waste residue and recovery.When adopting flotation technology to process, due to the waste residue complicated component, cause the rate of recovery low, can cause also that simultaneously particulate mixes, reduce concentrate grade.Because the sludge quality is little, specific surface area is large on the other hand, and the non-selective absorption to medicament causes reagent consumption high, affects concentrate grade.And microfine solubleness is large, and the dissolving of useful component causes ore pulp unavoidable ion concentration of component to increase, and the activation gangue mineral is difficult to realize selective separation, and slime coating and out-phase cohesion in addition causes floatation process to worsen.Therefore adopt single flotation technology also to be difficult to realize separating of valuable metal and gangue mineral in waste residue.Magnetic separation technology is the difference of utilizing various changing of magnetism, carries out a kind of beneficiation method of sorting in the magnetic field of magnetic separator, and it requires on other composition magnetic of separate substance, larger difference is arranged in material, is mainly used in sorting of ferrous metal (as iron, manganese); Gravity treatment is for the treatment of having the poor ore of greater density or other raw materials between valuable mineral and gangue.It is the effective ways of processing coarse grain, middle grain and particulate (roughly boundary is greater than 25 millimeters, 25～2 millimeters, 2～0.1 millimeters) ore.Efficient is not high when processing fine ore mud (less than 0.1 millimeter).Therefore single magnetic separation technology and gravity treatment technology all not too is fit to process waste residue.
Summary of the invention
The purpose of this invention is to provide a kind of method that hydro-thermal activation-aquation crystallization promotes that in waste residue, valuable metal separates with the calcic gangue mineral.The method is poor for metallic compound crystalline quality in waste residue, grain-size is little, valuable constituent and gangue content are difficult to realize the problem of effectively separating, by hydro-thermal activate-aquation crystallization regulation and control make the calcic gangue mineral change into the terra alba crystal of hundreds of micron.Other valuable metals are as less in the sulfide granularity that lead, zinc, copper etc. generate after hydro-thermal activates, and granularity does not change basically in hydration process.Therefore, can carry out physical sepn to terra alba and metallic sulfide by methods such as cyclone separator or wet screenings, thereby improve reclaim the grade of valuable metal in concentrate, be conducive to calcium in waste residue and the recycling of other valuable metal compositions.
The objective of the invention is to realize in the following manner:
A kind ofly promote valuable metal and the method that the calcic gangue mineral separates in waste residue, comprise the following steps:
autoclave will be put in waste residue, add sulphur or sodium sulphite as additive, the consumption of additive is according to the calcium that contains in waste residue and other metal ions are converted to calcium sulfate and metallic sulfide calculates, then the liquid-solid mass ratio by 3:1-5:1 adds entry, sealing is warming up to 150 ℃ of-200 ℃ of stirrings, keep stopped heating and stirring after 2-3 hour, naturally cool to 100 ℃, add sodium sulfate, sodium-chlor, one or more in vitriolate of tartar are as exciting agent, the exciting agent add-on accounts for the 5%-10% of waste residue weight, stir after 1-2 hour, naturally cool to 80 ℃, add again the terra alba crystal seed that accounts for reaction system waste residue weight 0.5%-1%, stir after 5-10 minute, naturally cool to 60 ℃, constant temperature keeps being cooled to room temperature after 1-2 hour, method by physical sepn makes terra alba crystal and other separating substances in material, separates material after the terra alba crystal and adopts the method for flotation to reclaim wherein metallic sulfide again,
Described waste residue comprises calcic solid waste or the semi-fluid shape material that ore dressing, metallurgy, chemical industry produce.
Calcium in described waste residue comprises with calcium hydroxide, the form existence of one or several of calcium carbonate or calcium sulfate.
Described other metals comprise one or more in gold and silver, copper, lead, zinc.
Described waste residue comprises melting waste slag, dust, mud, settling, flotation tailings or tailings.
During described sealed reaction, mixing speed is 150-250r/min.
Described terra alba crystal is that cyclone separator separates or wet screening with the method for other separating substances.
The present invention compared with prior art has following advantage and effect:
1) waste residue processed of the present invention need not dewater, the pre-treatment such as oven dry, the mud that water ratio is high also can directly be processed.
2) method provided by the invention is simple to operate, condition easy to control.
3) method provided by the invention because carrying out in the closed environment of autoclave, can produce the material of environment without obnoxious flavour and other, and the secondary pollution that therefore produces is little.
4) method provided by the invention is processed waste residue because sulfuration activates and processes through hydro-thermal, and the heavy metal in waste residue is fixed, and can play the effect of the Leaching that reduces harmful heavy metal, thereby is conducive to the stabilization of waste residue and innoxious.
5) method provided by the invention can realize the recycling of other valuable metals such as calcium and lead, zinc, copper simultaneously.
Description of drawings
Fig. 1 is process flow sheet of the present invention;
Fig. 2 (a) is the scanning electron microscope (SEM) photograph before the regulation and control of calcium sulfate pure compound aquation; (b) scanning electron microscope (SEM) photograph after the regulation and control of calcium sulfate pure compound aquation;
Fig. 3 (a) is the scanning electron microscope (SEM) photograph before certain utilising zinc containing waste residue hydro-thermal activation-aquation regulation and control; (b) be scanning electron microscope (SEM) photograph after the regulation and control of certain utilising zinc containing waste residue hydro-thermal activation-aquation;
Fig. 4 is the XRD figure of the terra alba of wet screening separation and Extraction after certain utilising zinc containing waste residue hydro-thermal activation-aquation regulation and control;
The result (flotation recovery rate of zinc and concentrate grade) of Fig. 5 for carrying out again the flotation experiment before and after certain utilising zinc containing waste residue hydro-thermal activation-aquation regulation and control; A wherein: before the regulation and control of hydro-thermal activation-aquation; B: after the regulation and control of hydro-thermal activation-aquation.
Embodiment
Following examples or embodiment are intended to further illustrate the present invention, rather than limitation of the invention.
Embodiment 1
The aquation regulation and control of calcium sulfate pure compound
Step 1 takes 100 gram anhydrous calciumsulphates and 10 gram sodium sulfate are placed in 1 liter of autoclave, then adds 300 ml waters, sealing autoclave, and rotating speed is set to 200r/min, and starter motor is warming up to 100 ℃, and constant temperature kept 2 hours.
In step 3, autoclave, material is down to 60 ℃ of constant temperature maintenances and is closed heater switch after 2 hours, treats that it naturally cools to room temperature.The opening high pressure still takes out material, filter, and water rinses repeatedly, removes soluble ion.Filter residue is placed in 40 ℃ of baking ovens dries.Adopt pattern and the size of scanning electron microscopic observation sample.
Aquation regulates and controls the observations of front and back sample under scanning electron microscope as shown in Figure 2, and before the regulation and control of calcium sulfate aquation, granularity is little, and most of grain diameter is about 100 microns.After the aquation regulation and control, tiny calcium sulphate crystal changes into the terra alba crystal, and it is large that granularity obviously becomes, and most of particle reaches 500 microns left and right, and plane of crystal is smooth, is prism-shaped.
Certain smeltery's utilising zinc containing waste residue hydro-thermal activation-aquation regulation and control
Step 1 is prepared burden utilising zinc containing waste residue and sulphur that certain smeltery produces in the ratio of M:S=1:1.2, the amount of substance of all heavy metals in the dried waste residue of the M unit of representative wherein, the amount of substance of the sulphur of S representative interpolation.Be that 3:1 adds entry by liquid-solid ratio, will put into autoclave, sealing autoclave after mixing of materials.
Step 3, the opening high pressure still takes out material, filters, and the water repetitive scrubbing, remove soluble ion.Filter residue is dried under 40 ℃.Adopt size and the pattern of scanning electron microscopic observation sample.Result as shown in Figure 3, utilising zinc containing waste residue is linen particulate sample powder-like, particle diameter is less than 5 microns, easily reunites.Calcium sulphate crystal is grown up to more than 200 microns after the regulation and control of hydro-thermal activation-aquation, and compact crystallization, and plane of crystal is smooth smooth, sticks phenomenon than obviously not reducing before the regulation and control of hydro-thermal activation-aquation.
Step 4, the employing wet screening is isolated larger-size crystal wherein, and the zinc content that records wherein is 0.3%.The XRD detected result shows, the larger-size crystal that extracts is terra alba.Ore pulp after extraction terra alba crystal is carried out the flotation of zinc sulphide, and the rate of recovery that draws zinc is 64%, and concentrate grade is 34%.Before and after the regulation and control of utilising zinc containing waste residue hydro-thermal activation-aquation, the flotation recovery rate of zinc and concentrate grade are as shown in Figure 4.The result demonstration, before the regulation and control of hydro-thermal activation-aquation, flotation recovery rate has improved 40% left and right, and concentrate grade has risen 16%.
Claims (4)
1. one kind promotes valuable metal and the method that the calcic gangue mineral separates in waste residue, it is characterized in that, comprises the following steps:
autoclave will be put in waste residue, add sulphur or sodium sulphite as additive, the consumption of additive is according to the calcium that contains in waste residue and other metal ions are converted to calcium sulfate and metallic sulfide calculates, then the liquid-solid mass ratio by 3:1-5:1 adds entry, sealing is warming up to 150 ℃ of-200 ℃ of stirrings, keep stopped heating and stirring after 2-3 hour, naturally cool to 100 ℃, add sodium sulfate, sodium-chlor, one or more in vitriolate of tartar are as exciting agent, the exciting agent add-on accounts for the 5%-10% of waste residue weight, stir after 1-2 hour, naturally cool to 80 ℃, add again the terra alba crystal seed that accounts for waste residue weight 0.5%-1%, stir after 5-10 minute, naturally cool to 60 ℃, constant temperature keeps being cooled to room temperature after 1-2 hour, method by physical sepn makes terra alba crystal and other separating substances in material, separates material after the terra alba crystal and adopts the method for flotation to reclaim wherein metallic sulfide again,
Described waste residue comprises calcic solid waste or the semi-fluid shape material that ore dressing, metallurgy, chemical industry produce.
Calcium in described waste residue comprises with calcium hydroxide, the form existence of one or several of calcium carbonate or calcium sulfate.
Described other metals comprise one or more in gold and silver, copper, lead, zinc.
2. valuable metal and the method that the calcic gangue mineral separates in promotion waste residue according to claim 1, is characterized in that, described waste residue comprises melting waste slag, dust, mud, settling, flotation tailings or tailings.
3. method according to claim 1, is characterized in that, during described sealed reaction, mixing speed is 150-250r/min.
4. method according to claim 1, is characterized in that, described terra alba crystal is that cyclone separator separates or wet screening with the method for other separating substances.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104946892A (en) * | 2015-05-15 | 2015-09-30 | 西北矿冶研究院 | Method for enriching valuable components from micro-fine particle settled sludge |
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2013
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104946892A (en) * | 2015-05-15 | 2015-09-30 | 西北矿冶研究院 | Method for enriching valuable components from micro-fine particle settled sludge |
| CN104946892B (en) * | 2015-05-15 | 2017-04-26 | 西北矿冶研究院 | Method for enriching valuable components from micro-fine particle settled sludge |
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