CN114774708B - Method for refining copper-removing from copper anode slime leaching slag - Google Patents
Method for refining copper-removing from copper anode slime leaching slag Download PDFInfo
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- CN114774708B CN114774708B CN202210232911.1A CN202210232911A CN114774708B CN 114774708 B CN114774708 B CN 114774708B CN 202210232911 A CN202210232911 A CN 202210232911A CN 114774708 B CN114774708 B CN 114774708B
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- Prior art keywords
- copper
- silver alloy
- gold
- refining
- silver
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- 239000010949 copper Substances 0.000 title claims abstract description 66
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 65
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 65
- 238000007670 refining Methods 0.000 title claims abstract description 32
- 239000002893 slag Substances 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000002386 leaching Methods 0.000 title claims abstract description 19
- 229910001316 Ag alloy Inorganic materials 0.000 claims abstract description 44
- PQTCMBYFWMFIGM-UHFFFAOYSA-N gold silver Chemical compound [Ag].[Au] PQTCMBYFWMFIGM-UHFFFAOYSA-N 0.000 claims abstract description 43
- 229910021607 Silver chloride Inorganic materials 0.000 claims abstract description 15
- 239000010453 quartz Substances 0.000 claims abstract description 15
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 15
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 claims abstract description 15
- 238000010438 heat treatment Methods 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 238000003723 Smelting Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 229910052709 silver Inorganic materials 0.000 abstract description 5
- 239000004332 silver Substances 0.000 abstract description 5
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 abstract description 3
- 239000010931 gold Substances 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 229910052737 gold Inorganic materials 0.000 abstract description 2
- 238000007664 blowing Methods 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 229910001020 Au alloy Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011143 downstream manufacturing Methods 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000005272 metallurgy Methods 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
- C22B11/00—Obtaining noble metals
- C22B11/02—Obtaining noble metals by dry processes
- C22B11/021—Recovery of noble metals from waste materials
-
- 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
- C22B11/00—Obtaining noble metals
-
- 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
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/10—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals with refining or fluxing agents; Use of materials therefor, e.g. slagging or scorifying agents
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a method for refining copper removal from copper anode slime leaching slag, which adopts a Kaldo furnace to obtain molten crude gold-silver alloy through smelting-converting the copper anode slime leaching slag, and adds a proper amount of silver chloride and quartz into the molten crude gold-silver alloy to react for two times to refine copper removal, and then the generated refining slag is scraped out to obtain gold-silver alloy with low copper content. After copper is removed from the crude gold-silver alloy, the copper content in the gold-silver alloy reaches a lower level, the copper removal effect is ideal, more than 97% of gold and silver enters the gold-silver alloy with low copper content in the refining process, the copper content can be removed to below 0.8%, and the pure gold-silver alloy is obtained, so that the operation is quick, the labor intensity is low, the operation efficiency is high, and the production cost is low.
Description
Technical Field
The invention belongs to the technical field of nonferrous metal metallurgy, and particularly relates to a method for refining and removing copper from copper anode slime leaching residues.
Background
The main treatment process of the existing copper anode slime is a process combining a wet method and a fire method, the copper anode slime leaching slag enters a Kaldo furnace to be smelted, blown and refined to produce gold-silver alloy after being dried, wherein the impurity element copper content in the silver anode plate produced by the existing treatment process is higher, and the silver anode plate generally contains Cu: 1.09-1.85%, the alloy blowing period is long, the flux consumption is large, the production cost is high, and great trouble is brought to the production of silver electrolysis in the downstream process.
Disclosure of Invention
The invention aims at the defects of the prior art, and provides a method for refining and removing copper from copper anode slime leaching slag, which has the advantages of low copper content in gold-silver alloy, quick operation, high operation efficiency, low labor intensity and low production cost.
The invention aims at realizing the following technical scheme:
a method for refining and removing copper from copper anode slime leaching slag comprises the following steps:
(1) Copper removal by primary refining: adding copper anode slime leaching slag into a Kaldo furnace, smelting and converting to obtain molten crude gold-silver alloy, reducing the temperature in the Kaldo furnace to 850-950 ℃, adding silver chloride and quartz into the molten crude gold-silver alloy, heating to 1150-1250 ℃ for reacting for 1.5-2 h, and standing for 0.2-0.5 h for slag skimming. Wherein the mass ratio of the silver chloride to the crude gold-silver alloy is 1:70-110; the mass ratio of the quartz to the crude gold-silver alloy is 1:30-50.
(2) Secondary refining copper removal: and after slag skimming, adding silver chloride and quartz into the molten crude gold-silver alloy, heating to 1150-1250 ℃ for reaction for 1.5-2 h, standing for 0.2-0.5 h, and skimming to finally obtain the copper-removed gold-silver alloy. Wherein the mass ratio of the silver chloride to the crude gold-silver alloy is 1:70-110; the mass ratio of the quartz to the crude gold-silver alloy is 1:45-75.
The invention has the following advantages:
(1) After copper is removed from the crude gold-silver alloy, the copper content in the gold-silver alloy reaches a lower level, and the copper removal effect is ideal;
(2) During refining, more than 97% of gold and silver enter the gold and silver alloy with low copper content;
(3) The copper content can be removed to below 0.8%, so that purer gold-silver alloy is obtained;
(4) The operation is quick, the labor intensity is low, the operation efficiency is high, and the production cost is low.
Drawings
FIG. 1 is a schematic diagram of a process flow of a method for refining copper removal from copper anode slime leaching residues.
Detailed Description
The invention will be further illustrated with reference to specific examples.
Example 1
(1) Copper removal by primary refining: adding 50t copper anode slime leaching slag into a Kaldo furnace, smelting and blowing to obtain a molten crude gold-silver alloy for about 4t, cooling the temperature in the furnace to 906 ℃, adding 40kg of silver chloride and 100kg of quartz into the molten crude gold-silver alloy, heating to 1150-1250 ℃ for reaction for 1.5-2 h, and standing for 0.2-0.5 h for slag skimming;
(2) Secondary refining copper removal: after slag skimming, obtaining crude gold-silver alloy subjected to primary refining copper removal for about 3t, adding 35kg of silver chloride and 50kg of quartz into the crude gold-silver alloy subjected to primary refining copper removal, heating to 1150-1250 ℃ for reaction for 1.5-2 h, standing for 0.2-0.5 h, and skimming to obtain gold-silver alloy with impurity element copper content of 0.61%.
Example 2
(1) Copper removal by primary refining: adding 60t copper anode slime leaching slag into a Kaldo furnace, smelting and blowing to obtain molten crude gold-silver alloy about 4t, cooling the furnace temperature to 893 ℃, adding 50kg of silver chloride and 100kg of quartz into the molten crude gold-silver alloy, heating to 1150-1250 ℃ for reaction for 1.5-2 h, and standing for 0.2-0.5 h for slag skimming;
(2) Secondary refining copper removal: after slag skimming, obtaining crude gold-silver alloy subjected to primary refining copper removal for about 3t, adding 40kg of silver chloride and 50kg of quartz into the crude gold-silver alloy subjected to primary refining copper removal, heating to 1150-1250 ℃ for reaction for 1.5-2 h, standing for 0.2-0.5 h, and skimming to obtain gold-silver alloy with impurity element copper content of 0.47%.
Example 3
(1) Copper removal by primary refining: adding 50t copper anode slime leaching slag into a Kaldo furnace, smelting and blowing to obtain a molten crude gold-silver alloy for about 4t, reducing the temperature in the furnace to 917 ℃, adding 40kg of silver chloride and 100kg of quartz into the molten crude gold-silver alloy, heating to 1150-1250 ℃ for reaction for 1.5-2 h, and standing for 0.2-0.5 h for slag skimming;
(2) Secondary refining copper removal: after slag skimming, obtaining crude gold-silver alloy subjected to primary refining copper removal for about 3t, adding 30kg of silver chloride and 50kg of quartz into the crude gold-silver alloy subjected to primary refining copper removal, heating to 1150-1250 ℃ for reaction for 1.5-2 h, standing for 0.2-0.5 h, and skimming to obtain gold-silver alloy with impurity element copper content of 0.74%.
Claims (5)
1. A method for refining and removing copper from copper anode slime leaching slag comprises the following steps:
(1) Copper removal by primary refining: adding copper anode slime leaching slag into a Kaldo furnace, smelting and converting to obtain molten crude gold-silver alloy, cooling the furnace to 850-950 ℃, adding silver chloride and quartz into the molten crude gold-silver alloy, heating to 1150-1250 ℃ for reaction for 1.5-2 h, and standing for 0.2-0.5 h for slag skimming;
(2) Secondary refining copper removal: after the slag skimming of refined slag generated by primary refining copper removal is finished, adding silver chloride and quartz into the crude gold-silver alloy in a molten state, heating to 1150-1250 ℃ for reaction for 1.5-2 h, and standing for 0.2-0.5 h for skimming, thereby finally obtaining the gold-silver alloy with low copper content.
2. The method for refining and removing copper from copper anode slime leaching residues according to claim 1, wherein the method comprises the following steps: in the step (1), the mass ratio of the silver chloride to the crude gold-silver alloy is 1:70-110.
3. The method for refining and removing copper from copper anode slime leaching residues according to claim 1, wherein the method comprises the following steps: in the step (1), the mass ratio of quartz to crude gold-silver alloy is 1:30-50.
4. The method for refining and removing copper from copper anode slime leaching residues according to claim 1, wherein the method comprises the following steps: in the step (2), the mass ratio of the silver chloride to the crude gold-silver alloy is 1:70-110.
5. The method for refining and removing copper from copper anode slime leaching residues according to claim 1, wherein the method comprises the following steps: in the step (2), the mass ratio of quartz to crude gold-silver alloy is 1:45-75.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210232911.1A CN114774708B (en) | 2022-03-10 | 2022-03-10 | Method for refining copper-removing from copper anode slime leaching slag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210232911.1A CN114774708B (en) | 2022-03-10 | 2022-03-10 | Method for refining copper-removing from copper anode slime leaching slag |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114774708A CN114774708A (en) | 2022-07-22 |
| CN114774708B true CN114774708B (en) | 2023-09-22 |
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| CN202210232911.1A Active CN114774708B (en) | 2022-03-10 | 2022-03-10 | Method for refining copper-removing from copper anode slime leaching slag |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB483741A (en) * | 1935-10-25 | 1938-04-26 | Samuel Joseph Blaut | Improvements in process of gold refining |
| CN101994013A (en) * | 2010-12-10 | 2011-03-30 | 四会市鸿明贵金属有限公司 | Copper scum smelting process |
| CN102703719A (en) * | 2012-07-03 | 2012-10-03 | 阳谷祥光铜业有限公司 | Technology for recovering valuable metals from noble metal slag |
| CN106811601A (en) * | 2016-12-29 | 2017-06-09 | 东营方圆有色金属有限公司 | A kind of copper anode mud decopper(ing) slag bottom-blown smelting technique |
| CN109536730A (en) * | 2018-10-30 | 2019-03-29 | 金川集团股份有限公司 | The method of lead bismuth alloy is extracted in a kind of copper anode mud melting waste slag |
| CN113981231A (en) * | 2021-11-03 | 2022-01-28 | 安徽铜冠有色金属（池州）有限责任公司 | Process for recovering lead, bismuth, gold and silver from copper anode slime smelting slag |
-
2022
- 2022-03-10 CN CN202210232911.1A patent/CN114774708B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB483741A (en) * | 1935-10-25 | 1938-04-26 | Samuel Joseph Blaut | Improvements in process of gold refining |
| CN101994013A (en) * | 2010-12-10 | 2011-03-30 | 四会市鸿明贵金属有限公司 | Copper scum smelting process |
| CN102703719A (en) * | 2012-07-03 | 2012-10-03 | 阳谷祥光铜业有限公司 | Technology for recovering valuable metals from noble metal slag |
| CN106811601A (en) * | 2016-12-29 | 2017-06-09 | 东营方圆有色金属有限公司 | A kind of copper anode mud decopper(ing) slag bottom-blown smelting technique |
| CN109536730A (en) * | 2018-10-30 | 2019-03-29 | 金川集团股份有限公司 | The method of lead bismuth alloy is extracted in a kind of copper anode mud melting waste slag |
| CN113981231A (en) * | 2021-11-03 | 2022-01-28 | 安徽铜冠有色金属（池州）有限责任公司 | Process for recovering lead, bismuth, gold and silver from copper anode slime smelting slag |
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| CN114774708A (en) | 2022-07-22 |
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Effective date of registration: 20240508 Address after: 737199 No. 2 Jianshe Road, Jinchuan District, Jinchang City, Gansu Province (east of Beijing Road, west of Heya Road, south of Guiyang Road) Patentee after: Jinchuan Group Copper Gui Co.,Ltd. Country or region after: China Address before: No.98, Jinchuan Road, Jinchuan District, Jinchang City, Gansu Province 737100 Patentee before: JINCHUAN GROUP Co.,Ltd. Country or region before: China |