CN102690946B - Method for comprehensively extracting valuable metals from tellurium-containing polymetallic materials - Google Patents
Method for comprehensively extracting valuable metals from tellurium-containing polymetallic materials Download PDFInfo
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- CN102690946B CN102690946B CN2012102051846A CN201210205184A CN102690946B CN 102690946 B CN102690946 B CN 102690946B CN 2012102051846 A CN2012102051846 A CN 2012102051846A CN 201210205184 A CN201210205184 A CN 201210205184A CN 102690946 B CN102690946 B CN 102690946B
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- tellurium
- silver
- bismuth
- lead
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- PORWMNRCUJJQNO-UHFFFAOYSA-N tellurium atom Chemical compound [Te] PORWMNRCUJJQNO-UHFFFAOYSA-N 0.000 title claims abstract description 77
- 229910052714 tellurium Inorganic materials 0.000 title claims abstract description 68
- 238000000034 method Methods 0.000 title claims abstract description 34
- 239000000463 material Substances 0.000 title claims abstract description 17
- 239000002184 metal Substances 0.000 title claims abstract description 16
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 16
- 150000002739 metals Chemical class 0.000 title abstract 2
- 229910052797 bismuth Inorganic materials 0.000 claims abstract description 29
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 claims abstract description 29
- 229910052709 silver Inorganic materials 0.000 claims abstract description 25
- 239000004332 silver Substances 0.000 claims abstract description 25
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims abstract description 22
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 21
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 18
- 239000002893 slag Substances 0.000 claims abstract description 17
- 229910052802 copper Inorganic materials 0.000 claims abstract description 16
- 239000010949 copper Substances 0.000 claims abstract description 16
- 238000002386 leaching Methods 0.000 claims abstract description 14
- 150000003839 salts Chemical class 0.000 claims abstract description 14
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 claims abstract description 13
- 230000003647 oxidation Effects 0.000 claims abstract description 12
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 12
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910017604 nitric acid Inorganic materials 0.000 claims abstract description 10
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 claims abstract description 10
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims abstract description 9
- 229910052938 sodium sulfate Inorganic materials 0.000 claims abstract description 9
- 235000011152 sodium sulphate Nutrition 0.000 claims abstract description 9
- -1 tellurium ions Chemical class 0.000 claims abstract description 9
- 229910021607 Silver chloride Inorganic materials 0.000 claims abstract description 7
- 235000011121 sodium hydroxide Nutrition 0.000 claims abstract description 6
- 238000000498 ball milling Methods 0.000 claims abstract description 3
- PIJPYDMVFNTHIP-UHFFFAOYSA-L lead sulfate Chemical compound [PbH4+2].[O-]S([O-])(=O)=O PIJPYDMVFNTHIP-UHFFFAOYSA-L 0.000 claims abstract description 3
- 239000007788 liquid Substances 0.000 claims description 25
- 238000004070 electrodeposition Methods 0.000 claims description 16
- 238000000605 extraction Methods 0.000 claims description 12
- 238000001914 filtration Methods 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 239000002351 wastewater Substances 0.000 claims description 6
- 239000012535 impurity Substances 0.000 claims description 5
- QGWDKKHSDXWPET-UHFFFAOYSA-E pentabismuth;oxygen(2-);nonahydroxide;tetranitrate Chemical compound [OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[O-2].[Bi+3].[Bi+3].[Bi+3].[Bi+3].[Bi+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O QGWDKKHSDXWPET-UHFFFAOYSA-E 0.000 claims description 5
- 238000001556 precipitation Methods 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 3
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 3
- 238000004458 analytical method Methods 0.000 claims description 3
- 230000001627 detrimental effect Effects 0.000 claims description 3
- 239000011790 ferrous sulphate Substances 0.000 claims description 3
- 235000003891 ferrous sulphate Nutrition 0.000 claims description 3
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims description 3
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims description 3
- SMBGWMJTOOLQHN-UHFFFAOYSA-N lead;sulfuric acid Chemical compound [Pb].OS(O)(=O)=O SMBGWMJTOOLQHN-UHFFFAOYSA-N 0.000 claims description 3
- 239000004571 lime Substances 0.000 claims description 3
- 238000005070 sampling Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- LAJZODKXOMJMPK-UHFFFAOYSA-N tellurium dioxide Chemical compound O=[Te]=O LAJZODKXOMJMPK-UHFFFAOYSA-N 0.000 claims description 3
- 238000004065 wastewater treatment Methods 0.000 claims description 3
- 230000007062 hydrolysis Effects 0.000 claims description 2
- 238000006460 hydrolysis reaction Methods 0.000 claims description 2
- 239000002244 precipitate Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 4
- 238000011084 recovery Methods 0.000 abstract description 4
- 235000010265 sodium sulphite Nutrition 0.000 abstract description 4
- 238000009854 hydrometallurgy Methods 0.000 abstract description 2
- 238000000151 deposition Methods 0.000 abstract 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- 238000003723 Smelting Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical group [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000706 filtrate Substances 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 235000010755 mineral Nutrition 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 241001124569 Lycaenidae Species 0.000 description 1
- 102000004316 Oxidoreductases Human genes 0.000 description 1
- 108090000854 Oxidoreductases Proteins 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 235000014987 copper Nutrition 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 239000000543 intermediate Substances 0.000 description 1
- 235000012054 meals Nutrition 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 238000009856 non-ferrous metallurgy Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- YPNVIBVEFVRZPJ-UHFFFAOYSA-L silver sulfate Chemical compound [Ag+].[Ag+].[O-]S([O-])(=O)=O YPNVIBVEFVRZPJ-UHFFFAOYSA-L 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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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
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- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention relates to a method for comprehensively extracting valuable metals from tellurium-containing polymetallic materials, and belongs to hydrometallurgy. The method comprises the steps of carrying out ball milling on the tellurium-containing polymetallic materials, carrying out oxidation leaching by using nitric acid, adding sodium sulfate to separate lead from the solution in a form of lead sulfate; adding industrial salt to precipitate silver in a form of silver chloride; reducing tellurium ions to crude tellurium powder by using sodium sulfite and the industrial salt and obtaining refined tellurium by using an electrolytic deposition method; and depositing bismuth by using caustic soda and depositing copper by using the electrolytic deposition method in the tellurium reduced solution, so as to realize the comprehensive recovery. The method disclosed by the invention has the advantages of high tellurium recovery rate, has good separating effect of copper, lead, bismuth, tellurium and silver, has no return slag and is suitable for treating low-grade tellurium-containing polymetallic materials.
Description
Technical field
The invention belongs to technical field of non-ferrous metallurgy, relate to hydrometallurgy process, particularly a kind of from contain the many metalliferous materials of tellurium the method for comprehensive extraction of valent metal.
Background technology
Tellurium is a kind of rare and scatter element, and is extremely low at natural content.Its average content in the earth's crust is about 1 * 10
-7% is difficult to form independent mineral deposit.At present, tellurium mainly is to extract the tellurium slag that produces of the soda slag that produces from tellurium-contained multi-metal ore or silver-colored oxidation refining and bismuth refining, as: on February 2nd, 2000, Chinese invention patent application publication number CN 1243098A, disclose a kind of accurate processing method of extracting from tellurium-contained multi-metal ore, comprised hydrochloric acid Oxidation Leaching ore, leach liquor is with the sulfur dioxide gas reduction and be settled out the meal tellurium, this coarse tellurium powder and oxygenant react in hydrochloric acid soln, obtain intermediates TeO
2, then smart tellurium product is collected in electrolysis.On October 28th, 2009, Chinese invention patent application publication number CN101565174A discloses again a kind of method of extracting smart tellurium from tellurium-contained smelting slag.Adopt mineral acid Oxidation Leaching, copper coin Cementation of Precious Metals, sodium sulphite precipitated copper, neutralization precipitation tellurium, thick TeO
2Alkaline leaching, Na
2S removal of impurities, concentrated, electrodeposition.
The leaching of above-mentioned two kinds of methods all needs acid oxidase to leach, add a large amount of oxygenants, production cost is high, and production process has again the shortcoming that produces a large amount of return slags, be difficult to process grade low contain the tellurium material, therefore, the tellurium extraction process of developing without returning charge, energy comprehensively recovering valuable metal has great importance.
Summary of the invention
The purpose of this invention is to provide a kind of from contain the many metalliferous materials of tellurium the method for comprehensive extraction of valent metal.The method has the high advantage of the tellurium rate of recovery, and copper, lead, bismuth, tellurium, silver-colored good separating effect produce the low-grade many metalliferous materials of tellurium that contain of suitable treatment without return slag.
In order to achieve the above object, technical scheme of the present invention is following design: a kind of from contain the many metalliferous materials of tellurium the method for comprehensive extraction of valent metal, contain the many metalliferous materials of tellurium behind ball milling, carry out Oxidation Leaching with nitric acid, make valuable metal lead, copper, bismuth, tellurium, silver enter solution; Adding sodium sulfate makes lead separate from solution with the form of lead sulfate; Adding Industrial Salt in heavy plumbous rear liquid makes silver precipitate with the form of silver chloride; Behind heavy silver, in the liquid, with S-WAT, Industrial Salt the tellurium ion is reduced into coarse tellurium powder, after the coarse tellurium powder roasting, obtains smart tellurium with conventional electrodeposition method; After the tellurium reduction, in the liquid, adjust the hydrolysis of pH value with caustic soda, bismuth is precipitated with the form of Vikaline; With the method for electrodeposition, make the copper electrodeposition in the liquid behind the heavy bismuth become cupric greater than 90% copper powder; Concrete technological process and processing parameter are as follows:
A, Oxidation Leaching
Bulk contain the many metalliferous materials of tellurium through crusher in crushing to granularity less than 3cm; Grind with ball mill by wet process again, require granularity to reach below 150 orders; Carry out Oxidation Leaching with nitric acid, the control liquid-solid ratio is for being 4～6:1l/g, and concentration of nitric acid is 3.5M, and extraction temperature is 90 ℃, and extraction time is 4～6 hours, makes valuable metal lead, copper, bismuth, tellurium, silver enter solution;
B, the heavy lead of substep
Press 0.57 times of adding sodium sulfate of plumbous amount in a step gained solution, at normal temperatures, stirred 1 hour; Remaining plumbum ion concentration value in the sampling analysis solution, 0.57 times of adding sodium sulfate by the remaining plumbous amount of this value conversion carries out the heavy lead second time again, until solution is leaded below 0.1g/l; After reaction was finished, solid-liquid separation was carried out in press filtration, and filter residue is the sulfuric acid lead skim;
C, heavy silver
Behind the heavy lead of b step, add Industrial Salt in the liquid, silver ions is precipitated with the silver chloride form, after the filtration, obtain the silver chloride slag, realize that silver separates from solution;
D, tellurium reduction
Add the S-WAT contain 10 times of tellurium amounts and the Industrial Salt that contains 4 times of tellurium amounts in the liquid behind the heavy silver of c step, under 80 ℃ of the temperature, take stirring velocity as 200 r/min, stirred 1.5 hours, filtration obtains coarse tellurium powder;
E, thick tellurium roasting
Coarse tellurium powder is put into Stainless Steel Disc, and bed thickness is 30～50mm, 400～500 ℃ of control temperature, and roasting 2～4 hours obtains tellurium dioxide; Then routinely method obtains smart tellurium by electrodeposition;
F, heavy bismuth
Add caustic soda in the rear liquid of tellurium reduction of d step, control pH value is 2, and bismuth is precipitated with the form of Vikaline, filters to get the bismuth slag;
G, electro deposited copper
To sink that liquid is 100A/m in current density behind the bismuth
2, 50～60 ℃ of temperature condition under electrodeposition, obtain cupric greater than 90% copper powder;
H, wastewater treatment
Waste water behind the g step electrodeposition adds ferrous sulfate method with lime and makes the detrimental impurity precipitation, makes discharged wastewater met the national standard.
Described Industrial Salt main component is NaCl.
Compared with the prior art, the present invention adopts nitric acid to carry out Oxidation Leaching, need not add in addition a large amount of oxygenants, and cheap Industrial Salt is all adopted in heavy silver and tellurium reduction, and production cost obviously reduces; The present invention is by process design optimization, and cashing has twice heavy tellurium of technology for once, and the technique effect that brings is that the tellurium rate of recovery is high, and copper, lead, bismuth, tellurium, silver-colored good separating effect are saved technique, reduces chemically to use agent, again reduces production costs.No matter relative CN101565174A, the present invention are separating coppers or soak tellurium, all expensive and harmful to the operator's health sodium sulphite of use cost not.Relative CN1243098A, the present invention is without return slag and sodium sulphite removal of impurities.The low-grade many metalliferous materials of tellurium that contain of the special suitable treatment of the present invention.
Description of drawings
Fig. 1 is process schematic representation of the present invention.
Embodiment
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
The tellurium-contained smelting slag composition that present embodiment adopts is as follows:
Pb22.27%?，Cu12.06%?，Te5.74%，Bi27.1%，Ag3.2024%；
From above-mentioned tellurium-contained smelting slag, extract processing step such as the accompanying drawing 1 of smart tellurium and comprehensively recovering valuable metal.
Concrete technological process and processing parameter are as follows:
A, Oxidation Leaching
Bulk contain the many metalliferous materials of tellurium through crusher in crushing to granularity less than 3cm; Grind with ball mill by wet process again, require granularity to reach below 150 orders; With the nitric acid as oxidant leaching agent of holding concurrently, leach lead, copper, bismuth, silver, tellurium, make valuable metal all enter solution, control liquid-solid ratio for being 4～6:1l/g, concentration of nitric acid is 3.5M, and extraction temperature is 90 ℃, and extraction time is 4～6 hours; After reaction is finished, filter and carry out solid-liquid separation, filter residue is made waste residue and is processed, and filtrate enters heavy splicer's order;
B, the heavy lead of substep
Press 0.57 times of adding sodium sulfate of plumbous amount in a step gained solution, at normal temperatures, stirred 1 hour; Remaining plumbum ion concentration value in the sampling analysis solution, 0.57 times of adding sodium sulfate by the remaining plumbous amount of this value conversion carries out the heavy lead second time again, until solution is leaded below 0.1g/l, not produce Sulfuric acid disilver salt as principle; After reaction was finished, solid-liquid separation was carried out in press filtration, and filter residue is the sulfuric acid lead skim; Filtrate enters heavy silver-colored operation;
C, heavy silver
Behind the heavy lead of b step, add Industrial Salt in the liquid, silver ions is precipitated with the silver chloride form, after the filtration, obtain the silver chloride slag, realize that silver separates from solution; The silver chloride slag adds iron powder replacement and becomes thick silver after pulp;
D, tellurium reduction
Add the S-WAT contain 10 times of tellurium amounts and the Industrial Salt that contains 4 times of tellurium amounts in the liquid behind the heavy silver of c step, under 80 ℃ of the temperature, take stirring velocity as 200 r/min, stirred 1.5 hours, filtration obtains coarse tellurium powder; Liquid is used for heavy bismuth after the tellurium reduction;
E, thick tellurium roasting
Coarse tellurium powder is put into Stainless Steel Disc, and bed thickness is 30～50mm, 400～500 ℃ of temperature of control, and roasting 2～4 hours obtains white or flaxen tellurium dioxide, and then routinely method obtains smart tellurium by electrodeposition;
F, heavy bismuth
Add caustic soda in the rear liquid of tellurium reduction of d step, control pH value is 2, and bismuth is precipitated with the form of Vikaline, filters to get the bismuth slag; The bismuth slag becomes thick bismuth with pyrometallurgical smelting;
G, electro deposited copper
To sink that liquid is 100A/m in current density behind the bismuth
2, 50～60 ℃ of temperature condition under electrodeposition, obtain cupric greater than 90% copper powder;
H, wastewater treatment
Waste water behind the g step electrodeposition adds ferrous sulfate method with lime and makes the detrimental impurity precipitation, makes discharged wastewater met the national standard.
Claims (1)
1. the method for a comprehensive extraction of valent metal from contain the many metalliferous materials of tellurium is characterized in that: contain the many metalliferous materials of tellurium behind ball milling, carry out Oxidation Leaching with nitric acid, make valuable metal lead, copper, bismuth, tellurium, silver enter solution; Adding sodium sulfate makes lead separate from solution with the form of lead sulfate; Adding Industrial Salt in heavy plumbous rear liquid makes silver precipitate with the form of silver chloride; Behind heavy silver, in the liquid, with S-WAT, Industrial Salt the tellurium ion is reduced into coarse tellurium powder, after the coarse tellurium powder roasting, obtains smart tellurium with conventional electrodeposition method; After the tellurium reduction, in the liquid, adjust the hydrolysis of pH value with caustic soda, bismuth is precipitated with the form of Vikaline; With the method for electrodeposition, make the copper electrodeposition in the liquid behind the heavy bismuth become cupric greater than 90% copper powder; Concrete technological process and processing parameter are as follows:
A, Oxidation Leaching
Bulk contain the many metalliferous materials of tellurium through crusher in crushing to granularity less than 3cm; Grind with ball mill by wet process again, require granularity to reach below 150 orders; Carry out Oxidation Leaching with nitric acid, the control liquid-solid ratio is for being 4～6:1l/g, and concentration of nitric acid is 3.5M, and extraction temperature is 90 ℃, and extraction time is 4～6 hours, makes valuable metal lead, copper, bismuth, tellurium, silver enter solution;
B, the heavy lead of substep
Press 0.57 times of adding sodium sulfate of plumbous amount in a step gained solution, at normal temperatures, stirred 1 hour; Remaining plumbum ion concentration value in the sampling analysis solution, 0.57 times of adding sodium sulfate by the remaining plumbous amount of this value conversion carries out the heavy lead second time again, until solution is leaded below 0.1g/l; After reaction was finished, solid-liquid separation was carried out in press filtration, and filter residue is the sulfuric acid lead skim;
C, heavy silver
Behind the heavy lead of b step, add Industrial Salt in the liquid, silver ions is precipitated with the silver chloride form, after the filtration, obtain the silver chloride slag, realize that silver separates from solution;
D, tellurium reduction
Add the S-WAT contain 10 times of tellurium amounts and the Industrial Salt that contains 4 times of tellurium amounts in the liquid behind the heavy silver of c step, under 80 ℃ of the temperature, take stirring velocity as 200 r/min, stirred 1.5 hours, filtration obtains coarse tellurium powder;
E, thick tellurium roasting
Coarse tellurium powder is put into Stainless Steel Disc, and bed thickness is 30～50mm, 400～500 ℃ of control temperature, and roasting 2～4 hours obtains tellurium dioxide; Then routinely method obtains smart tellurium by electrodeposition;
F, heavy bismuth
Add caustic soda in the rear liquid of tellurium reduction of d step, control pH value is 2, and bismuth is precipitated with the form of Vikaline, filters to get the bismuth slag;
G, electro deposited copper
To sink that liquid is 100A/m in current density behind the bismuth
2, 50～60 ℃ of temperature condition under electrodeposition, obtain cupric greater than 90% copper powder;
H, wastewater treatment
Waste water behind the g step electrodeposition adds ferrous sulfate method with lime and makes the detrimental impurity precipitation, makes discharged wastewater met the national standard.
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| CN102897725B (en) * | 2012-10-25 | 2015-11-18 | 湖南水口山有色金属集团有限公司 | A kind of Tellurium dioxide purification method |
| CN102994766B (en) * | 2012-12-12 | 2014-06-04 | 四会市鸿明贵金属有限公司 | Method for comprehensively recovering valuable metal from copper tellurium slag |
| CN105441970A (en) * | 2015-11-18 | 2016-03-30 | 金川集团股份有限公司 | New method for removing impurities in tellurium electrolyte |
| CN105420508A (en) * | 2015-12-09 | 2016-03-23 | 永兴县灿阳贵金属有限责任公司 | Method for extracting lead and bismuth from precious metal smelting waste residues |
| CN107674992B (en) * | 2017-09-21 | 2019-08-09 | 中国科学院过程工程研究所 | A kind of clean extraction method of metal silver |
| CN108842067A (en) * | 2018-08-24 | 2018-11-20 | 淄博淦达环保科技有限公司 | The lixiviation process preparation process of lead in a kind of lead concentrate |
| CN108842066A (en) * | 2018-08-24 | 2018-11-20 | 淄博淦达环保科技有限公司 | A kind of leaching liquid and extract technology of lead |
| CN109704295B (en) * | 2019-03-14 | 2022-09-02 | 阳谷祥光铜业有限公司 | Method for preparing refined tellurium |
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|---|---|---|---|---|
| EP0020826A1 (en) * | 1979-06-14 | 1981-01-07 | Institute Of Nuclear Energy Research | A hydrometallurgical process for recovering precious metals from anode slime |
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