CN115247232A - Method for settling and separating chalcoalumite slag calcification product - Google Patents
Method for settling and separating chalcoalumite slag calcification product Download PDFInfo
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- CN115247232A CN115247232A CN202210195260.3A CN202210195260A CN115247232A CN 115247232 A CN115247232 A CN 115247232A CN 202210195260 A CN202210195260 A CN 202210195260A CN 115247232 A CN115247232 A CN 115247232A
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- Prior art keywords
- slag
- settling
- separating
- product
- iron vitriol
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- 239000002893 slag Substances 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000002308 calcification Effects 0.000 title claims abstract description 10
- 229960004887 ferric hydroxide Drugs 0.000 claims abstract description 24
- 229910001385 heavy metal Inorganic materials 0.000 claims abstract description 24
- IEECXTSVVFWGSE-UHFFFAOYSA-M iron(3+);oxygen(2-);hydroxide Chemical compound [OH-].[O-2].[Fe+3] IEECXTSVVFWGSE-UHFFFAOYSA-M 0.000 claims abstract description 24
- 239000000047 product Substances 0.000 claims abstract description 23
- 238000000926 separation method Methods 0.000 claims abstract description 15
- 239000011575 calcium Substances 0.000 claims abstract description 12
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 12
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 11
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000002244 precipitate Substances 0.000 claims abstract description 9
- 239000002738 chelating agent Substances 0.000 claims abstract description 8
- 239000010440 gypsum Substances 0.000 claims abstract description 8
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 8
- 239000011259 mixed solution Substances 0.000 claims abstract description 8
- 239000000243 solution Substances 0.000 claims abstract description 8
- 239000008394 flocculating agent Substances 0.000 claims abstract description 6
- 239000007787 solid Substances 0.000 claims abstract description 5
- 229910052935 jarosite Inorganic materials 0.000 claims description 21
- SURQXAFEQWPFPV-UHFFFAOYSA-L iron(2+) sulfate heptahydrate Chemical compound O.O.O.O.O.O.O.[Fe+2].[O-]S([O-])(=O)=O SURQXAFEQWPFPV-UHFFFAOYSA-L 0.000 claims description 15
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims description 15
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 9
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 9
- 239000011230 binding agent Substances 0.000 claims description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 5
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 4
- 235000019738 Limestone Nutrition 0.000 claims description 4
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 4
- 239000004571 lime Substances 0.000 claims description 4
- 239000006028 limestone Substances 0.000 claims description 4
- UOFGSWVZMUXXIY-UHFFFAOYSA-N 1,5-Diphenyl-3-thiocarbazone Chemical compound C=1C=CC=CC=1N=NC(=S)NNC1=CC=CC=C1 UOFGSWVZMUXXIY-UHFFFAOYSA-N 0.000 claims description 3
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 claims description 3
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 claims description 3
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 claims description 3
- 241001584775 Tunga penetrans Species 0.000 claims description 3
- DGEZNRSVGBDHLK-UHFFFAOYSA-N [1,10]phenanthroline Chemical compound C1=CN=C2C3=NC=CC=C3C=CC2=C1 DGEZNRSVGBDHLK-UHFFFAOYSA-N 0.000 claims description 3
- 235000015165 citric acid Nutrition 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- MGFYIUFZLHCRTH-UHFFFAOYSA-N nitrilotriacetic acid Chemical compound OC(=O)CN(CC(O)=O)CC(O)=O MGFYIUFZLHCRTH-UHFFFAOYSA-N 0.000 claims description 3
- 235000006408 oxalic acid Nutrition 0.000 claims description 3
- 239000008188 pellet Substances 0.000 claims description 3
- 229920002401 polyacrylamide Polymers 0.000 claims description 3
- 229920005552 sodium lignosulfonate Polymers 0.000 claims description 3
- 239000011975 tartaric acid Substances 0.000 claims description 3
- 235000002906 tartaric acid Nutrition 0.000 claims description 3
- 229920002472 Starch Polymers 0.000 claims description 2
- 239000002994 raw material Substances 0.000 claims description 2
- 239000008107 starch Substances 0.000 claims description 2
- 235000019698 starch Nutrition 0.000 claims description 2
- 238000004062 sedimentation Methods 0.000 claims 2
- 238000011085 pressure filtration Methods 0.000 claims 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 16
- 229910052742 iron Inorganic materials 0.000 description 8
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- 238000009854 hydrometallurgy Methods 0.000 description 6
- 150000002500 ions Chemical class 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
- 229910052725 zinc Inorganic materials 0.000 description 6
- 239000011701 zinc Substances 0.000 description 6
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- 229910052738 indium Inorganic materials 0.000 description 4
- 229940037003 alum Drugs 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 230000001376 precipitating effect Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000005995 Aluminium silicate Substances 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 229920002125 Sokalan® Polymers 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 229910001804 ammoniojarosite Inorganic materials 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000005137 deposition process Methods 0.000 description 1
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000002920 hazardous waste Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 235000014413 iron hydroxide Nutrition 0.000 description 1
- NCNCGGDMXMBVIA-UHFFFAOYSA-L iron(ii) hydroxide Chemical compound [OH-].[OH-].[Fe+2] NCNCGGDMXMBVIA-UHFFFAOYSA-L 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- JQJCSZOEVBFDKO-UHFFFAOYSA-N lead zinc Chemical compound [Zn].[Pb] JQJCSZOEVBFDKO-UHFFFAOYSA-N 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052901 montmorillonite Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/006—Wet processes
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/46—Sulfates
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G49/00—Compounds of iron
- C01G49/02—Oxides; Hydroxides
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/16—Sintering; Agglomerating
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/2406—Binding; Briquetting ; Granulating pelletizing
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/242—Binding; Briquetting ; Granulating with binders
- C22B1/243—Binding; Briquetting ; Granulating with binders inorganic
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Manufacturing & Machinery (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Geochemistry & Mineralogy (AREA)
- Inorganic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The patent discloses a method for settling and separating a chalcoalumite slag calcification product, wherein a calcium source, an interfacial agent and a chelating agent are added into the chalcoalumite slag and uniformly mixed to obtain the calcification product; settling and separating the calcified product to obtain a mixed solution of gypsum and ferric hydroxide heavy metal; and adding a flocculating agent into the mixed solution of the ferric hydroxide and the heavy metal, and carrying out liquid-solid separation to obtain ferric hydroxide precipitate and a heavy metal solution. Compared with the prior art, the method has the advantages of simple operation, low cost and high purity of the calcified product.
Description
Technical Field
The invention relates to a hydrometallurgical process, in particular to a method for separating iron and sulfur and recovering heavy metals from jarosite slag generated in the process.
Background
The jarosite slag is a byproduct precipitate generated by removing iron by adopting an jarosite method in an iron-containing sulfuric acid leaching solution in the hydrometallurgy industry, and is called as jarosite or jarosite slag for short. According to different alum precipitating agents, the main phases of the obtained precipitation products are jarosite, jarosite or ammoniojarosite respectively. Jarosite process iron removal is commonly used in zinc hydrometallurgy, nickel hydrometallurgy, and lithium battery recovery industries. For example, in the zinc hydrometallurgy industry, about 85% of the world enterprises adopt the jarosite method to remove iron, and the alum deposition product-jarosite slag is obtained. Indium is often associated with lead-zinc ores, and because indium has similar chemical properties with iron, the associated indium is easy to enter crystal lattices of jarosite in the alum deposition process, and thus enters jarosite slag. In addition, zinc may also partially replace iron into the crystal lattice of jarosite. The iron vitriol slag has large amount, poor stability and acidity, contains Cd, as, pb and the like besides heavy metals of In and Zn, and is listed In the national hazardous waste list (waste code: 321-005-48) In China. Zinc as a common metal has wide application in the mechanical industry, the national defense industry and the transportation industry, and China continuously occupies the world for many years as a big country for zinc production and consumption. At present, the stockpiling amount of the iron vitriol slag in China exceeds 3500 ten thousand, and the iron vitriol slag is increased at a speed of more than 100 thousand every year. In the hydrometallurgy industry, development of a new technology for recycling jarosite slag is urgently needed.
Disclosure of Invention
Compared with the prior art, the method has the advantages of simple operation, low cost and obvious economic and social benefits.
A method for settling and separating a chalcoalumite slag calcification product comprises the following steps:
adding a calcium source, an interfacial agent and a chelating agent into the jarosite slag, and uniformly mixing to obtain a calcification product; settling and separating the calcified product to obtain a mixed solution of gypsum and ferric hydroxide heavy metal; and adding a flocculating agent into the mixed solution of the ferric hydroxide and the heavy metal, and performing liquid-solid separation to obtain ferric hydroxide precipitate and a heavy metal solution.
The calcium source is one of lime, carbide slag and limestone, and the addition amount is 10-50% of the mass of the jarosite slag.
The interface agent is one of citric acid, tartaric acid and oxalic acid, and the addition amount is 1.0-5.0% of the weight of the jarosite slag.
The chelating agent is one of ethylenediamine tetraacetic acid, nitrilotriacetic acid, dithizone and o-phenanthroline, and the addition amount is 1.0-5.0% of the mass of the jarosite slag.
The equipment used for settling separation is one of a cyclone, an interference bed and a jigger.
The flocculant is one of polyacrylamide, sodium lignosulphonate and starch, and the addition amount of the flocculant is 1.0-5.0% of the mass of the iron vitriol slag.
And (3) carrying out filter pressing on the ferric hydroxide precipitate, adding a binder to form balls, and sintering by using hydrogen to obtain the iron-making raw material.
And returning the heavy metal solution to a metallurgical system to recover the heavy metal.
Compared with the prior art, the invention has the following advantages:
the calcium source is one of lime, carbide slag and limestone, the iron vitriol slag is acidic substance which can be decomposed under neutral or alkaline condition, and the calcium source is added to decompose the iron vitriol slag to obtain calcified product. The lime is obtained by electrically heating limestone, and the byproduct carbon dioxide is used for maintaining the low-calcium cement product, so that the early performance of the low-calcium cement product is improved, and the carbon dioxide is prevented from being discharged to the environment to influence the environment.
The interface agent is one of citric acid, tartaric acid and oxalic acid, and can be adsorbed on the surface of the ferric hydroxide to obtain the nano ferric hydroxide, and the particle size of the nano ferric hydroxide is less than 100nm. The interfacial agent can also hinder the gypsum from growing into a columnar shape, and large equiaxed particles with the particle size larger than 50 mu m can be obtained. The difference between the particle sizes of the calcium product gypsum and the ferric hydroxide is large, which is beneficial to settling separation.
The chelating agent is one of ethylenediamine tetraacetic acid, nitrilotriacetic acid, dithizone and o-phenanthroline, is easy to interact with heavy metal ions, enables the heavy metal ions to enter a solution under a neutral or alkaline condition, avoids the heavy metal ions from precipitating in a calcification process, avoids the heavy metal ions from entering an internal structure of ferric hydroxide or gypsum, also avoids the heavy metal ions from being adsorbed on the surface of the ferric hydroxide or gypsum, and is beneficial to recovery of the heavy metal ions.
The equipment used for settling separation is one of a cyclone, an interference bed and a jigger, and the equipment is gravity separation equipment, can realize high-efficiency separation of micro-fine particle grade particles, and has the characteristics of low operation cost and high separation efficiency.
The flocculating agent is one of polyacrylamide, sodium lignosulphonate and polyacrylic acid, can enable the nano ferric hydroxide particles to be rapidly settled, and is beneficial to liquid-solid separation.
The ferric hydroxide precipitate is subjected to filter pressing to further reduce the water content in the precipitate. Adding a binder into the ferric hydroxide to form balls, wherein the binder is one of bentonite, montmorillonite and kaolin, and the addition amount of the binder is 1-10% of the mass of the jarosite slag. The addition of the binder ensures that the iron hydroxide ball is not cracked or damaged in the sintering process. The pellets are obtained after the ferric hydroxide is sintered, which is beneficial to iron making. The hydrogen sintering is adopted, carbon dioxide is not discharged, and the environment is protected. The hydrogen used is green hydrogen generated by electrolyzing water by using renewable energy sources.
Detailed Description
The present invention will be described in further detail with reference to specific examples.
Adding a calcium source, an interfacial agent and a chelating agent into the jarosite slag, and uniformly mixing to obtain a calcified product; settling and separating the calcified product to obtain a mixed solution of gypsum and ferric hydroxide heavy metal; and adding a flocculating agent into the mixed solution of the ferric hydroxide and the heavy metal, and performing liquid-solid separation to obtain ferric hydroxide precipitate and a heavy metal solution. The formulations of the calcium source, the interfacial agent, and the chelating agent are shown in Table 1, and the separation equipment, the flocculant, and the separation efficiency are shown in Table 2.
TABLE 1
TABLE 2
The embodiments of the present invention can be implemented and achieved, and the present invention is not limited to these embodiments.
Claims (8)
1. The method for settling and separating the chalcoalumite calcification product is characterized by sequentially comprising the following steps of: adding a calcium source, an interfacial agent and a chelating agent into the jarosite slag, and uniformly mixing to obtain a calcification product; settling and separating the calcified product to obtain a mixed solution of gypsum and ferric hydroxide heavy metal; and adding a flocculating agent into the mixed solution of the ferric hydroxide and the heavy metal, and performing liquid-solid separation to obtain ferric hydroxide precipitate and a heavy metal solution.
2. The method for separating and settling the calcified products of iron vitriol slag as claimed in claim 1, wherein the calcium source is one of lime, carbide slag and limestone, and the addition amount is 10-50% of the mass of the iron vitriol slag.
3. The method for separating and settling the calcified products of iron vitriol slag as claimed in claim 1, wherein the interface agent is one of citric acid, tartaric acid and oxalic acid, and the amount of the added interface agent is 1.0-5.0% of the mass of the iron vitriol slag.
4. The method for separating and settling the calcified product of iron vitriol slag as claimed in claim 1, wherein the chelating agent is one of ethylenediamine tetraacetic acid, nitrilotriacetic acid, dithizone and phenanthroline, and the addition amount is 1.0-5.0% of the weight of the iron vitriol slag.
5. The method for the sedimentation separation of the chalcoalumite slag calcification product as claimed in claim 1, wherein the equipment used for the sedimentation separation is one of a cyclone, an interference bed and a jigger.
6. The method for separating and settling the calcified iron vitriol slag as claimed in claim 1, wherein the flocculating agent is one of polyacrylamide, sodium lignosulfonate and starch, and the addition amount is 1.0-5.0% of the mass of the iron vitriol slag.
7. The method of claim 1, wherein the ferric hydroxide precipitate is made into a pellet by pressure filtration and adding a binder, and the pellet is sintered with hydrogen gas to be used as an iron-making raw material.
8. The method for separating and settling the calcified products of iron vitriol slag as claimed in claim 1, wherein the heavy metal solution is returned to the metallurgical system for recovering the heavy metals.
Priority Applications (1)
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| CN202210195260.3A CN115247232B (en) | 2022-03-02 | 2022-03-02 | Settling separation method for chalcanthite slag calcified products |
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| WO2013165071A1 (en) * | 2012-04-30 | 2013-11-07 | 전남대학교산학협력단 | Method for producing high-purity manganese sulfate monohydrate and high-purity manganese sulfate monohydrate produced by the method |
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| CN105567961A (en) * | 2016-01-18 | 2016-05-11 | 西南科技大学 | Method for separating iron and sulfur in jarosite slag through biological technique |
| CN106676221A (en) * | 2016-12-06 | 2017-05-17 | 江苏省冶金设计院有限公司 | Jarosite slag treatment method and system |
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| CN111549235A (en) * | 2019-02-08 | 2020-08-18 | 北京中金瑞丰环保科技有限公司 | Separation method of lead-containing raw material |
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- 2022-03-02 CN CN202210195260.3A patent/CN115247232B/en active Active
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