CN114807623B - Method for removing tellurium from copper anode slime leaching residues - Google Patents
Method for removing tellurium from copper anode slime leaching residues Download PDFInfo
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- CN114807623B CN114807623B CN202210232698.4A CN202210232698A CN114807623B CN 114807623 B CN114807623 B CN 114807623B CN 202210232698 A CN202210232698 A CN 202210232698A CN 114807623 B CN114807623 B CN 114807623B
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- China
- Prior art keywords
- tellurium
- silver alloy
- gold
- copper anode
- anode slime
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- PORWMNRCUJJQNO-UHFFFAOYSA-N tellurium atom Chemical compound [Te] PORWMNRCUJJQNO-UHFFFAOYSA-N 0.000 title claims abstract description 67
- 229910052714 tellurium Inorganic materials 0.000 title claims abstract description 66
- 238000000034 method Methods 0.000 title claims abstract description 22
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 21
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 21
- 239000010949 copper Substances 0.000 title claims abstract description 21
- 238000002386 leaching Methods 0.000 title claims abstract description 19
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 66
- 229910001316 Ag alloy Inorganic materials 0.000 claims abstract description 53
- PQTCMBYFWMFIGM-UHFFFAOYSA-N gold silver Chemical compound [Ag].[Au] PQTCMBYFWMFIGM-UHFFFAOYSA-N 0.000 claims abstract description 52
- 239000007787 solid Substances 0.000 claims abstract description 20
- 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
- 239000002893 slag Substances 0.000 claims description 29
- 238000010438 heat treatment Methods 0.000 claims description 13
- 238000003723 Smelting Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims 2
- 238000007664 blowing Methods 0.000 abstract description 5
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052709 silver Inorganic materials 0.000 abstract description 4
- 239000004332 silver Substances 0.000 abstract description 4
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 abstract description 3
- 239000010931 gold Substances 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 229910052737 gold Inorganic materials 0.000 abstract description 2
- 239000012535 impurity Substances 0.000 description 4
- 230000004907 flux Effects 0.000 description 2
- 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
- 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
- C22B11/023—Recovery of noble metals from waste materials from pyrometallurgical residues, e.g. from ashes, dross, flue dust, mud, skim, slag, sludge
-
- 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
- C22B7/001—Dry processes
-
- 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
- C22B7/04—Working-up slag
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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)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a method for removing tellurium from copper anode slime leaching residues, which comprises the steps of adding proper amount of solid sodium hydroxide and quartz into crude gold-silver alloy in a molten state by adopting a Kaldo furnace smelting-converting method to perform three-time tellurium removal, and then stripping out the generated converting tellurium residues to obtain gold-silver alloy with low tellurium content. After tellurium is removed from the crude gold-silver alloy, the tellurium content in the gold-silver alloy reaches a very low level, the tellurium removal effect is ideal, more than 97% of gold and silver enters the gold-silver alloy with low tellurium content in the blowing process, the tellurium content can be removed to below 0.015%, and the purer 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 removing tellurium 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 tellurium content in the silver anode plate produced by the existing treatment process is higher, and the silver anode plate generally contains Te: 0.013-0.058%, long alloy converting period, high labor intensity of staff in preparing flux operation, high flux consumption cost and great difficulty in treating copper anode slime leaching residues.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the method for removing tellurium from the copper anode slime leaching slag, so that the tellurium content in the gold-silver alloy is low, the operation is quick, the operation efficiency is high, the labor intensity is low, and the production cost is low.
The invention aims at realizing the following technical scheme:
a method for removing tellurium from copper anode slime leaching residues, characterized by comprising the following steps:
(1) Removing tellurium at a time: 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 solid sodium hydroxide and quartz into the molten crude gold-silver alloy, heating to 1150-1250 ℃, reacting for 1.5-2 h, and standing for 0.5-1 h to remove slag. Wherein the mass ratio of the solid sodium hydroxide to the crude gold-silver alloy is 1:100-160; the mass ratio of the quartz to the crude gold-silver alloy is 1:26-32.
(2) And (3) removing tellurium secondarily: after slag skimming, adding solid sodium hydroxide and quartz into the crude gold-silver alloy subjected to tellurium removal at one time, heating to 1150-1250 ℃ for reaction for 1.5-2 h, and standing for 0.5-1 h for slag skimming. Wherein the mass ratio of the solid sodium hydroxide to the crude gold-silver alloy after primary tellurium removal is 1:80-120; the mass ratio of quartz to the crude gold-silver alloy after primary tellurium removal is 1:25-30.
(3) Tellurium removal for three times: and after slag skimming, adding solid sodium hydroxide into the coarse gold-silver alloy subjected to the secondary tellurium removal, heating to 1150-1250 ℃ for reaction for 1.5-2 h, standing for 0.5-1 h, and skimming to obtain the gold-silver alloy subjected to the tellurium removal. Wherein the mass ratio of the solid sodium hydroxide to the coarse gold-silver alloy subjected to secondary tellurium removal is 1:80-160.
The invention has the following advantages:
(1) After tellurium is removed from the crude gold-silver alloy, the tellurium content in the gold-silver alloy reaches a very low level, the tellurium removal effect is ideal, and the tellurium content can be removed to below 0.015%, so that the purer gold-silver alloy is obtained;
(2) During the blowing process of the Kaldo furnace, more than 97 percent of gold and silver enter the gold and silver alloy with low tellurium content;
(3) 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 process flow diagram of a method for removing tellurium from copper anode mud leaching residues.
Detailed Description
The invention will be further illustrated with reference to specific examples.
Example 1
(1) Removing tellurium at a time: adding 60t copper anode slime leaching slag into a Kaldo furnace, smelting and blowing to obtain a molten crude gold-silver alloy for about 8t, cooling the temperature in the furnace to 883 ℃, adding 75kg of sodium hydroxide and 250kg of quartz into the molten crude gold-silver alloy, heating to 1150-1250 ℃ for reaction for 1.5-2 h, and standing for 0.5-1 h for slag skimming;
(2) And (3) removing tellurium secondarily: after slag skimming, obtaining about 5.5t of crude gold-silver alloy after primary tellurium removal, adding 50kg of solid sodium hydroxide and 200kg of quartz into the crude gold-silver alloy after primary tellurium removal, heating to 1150-1250 ℃ for reaction for 1.5-2 h, and standing for 0.5-1 h for slag skimming;
(3) Tellurium removal for three times: and (3) after slag skimming, obtaining about 4t of coarse gold-silver alloy after secondary tellurium removal, adding 25kg of solid sodium hydroxide into the coarse gold-silver alloy after secondary tellurium removal, heating to 1150-1250 ℃ for reaction for 1.5-2 h, standing for 0.5-1 h, skimming, and finally obtaining the gold-silver alloy with the impurity element tellurium content of 0.0040%.
Example 2
(1) Removing tellurium at a time: adding the leached slag of the copper anode slime of 62t into a Kaldo furnace, smelting and blowing to obtain a crude gold-silver alloy in a molten state of about 8t, reducing the temperature in the furnace to 935 ℃, adding 65kg of solid sodium hydroxide and 250kg of quartz into the crude gold-silver alloy in the molten state, heating to 1150-1250 ℃ for reaction for 1.5-2 h, and standing for 0.5-1 h for slag skimming;
(2) And (3) removing tellurium secondarily: after slag skimming, obtaining about 5.5t of crude gold-silver alloy after primary tellurium removal, adding 65kg of solid sodium hydroxide and 200kg of quartz into the crude gold-silver alloy after primary tellurium removal, heating to 1150-1250 ℃ to react for 1.5-2 h, and standing for 0.5-1 h for slag skimming;
(3) Tellurium removal for three times: after slag skimming, obtaining coarse gold-silver alloy after secondary tellurium removal about 4t, adding 40kg of solid sodium hydroxide into the coarse gold-silver alloy after secondary tellurium removal, heating to 1150-1250 ℃ for reaction for 1.5-2 h, and standing for 0.5-1 h
And skimming slag to obtain gold-silver alloy with impurity element tellurium content of 0.0038%.
Example 3
(1) Removing tellurium at a time: adding 65t copper anode slime leaching slag into a Kaldo furnace, smelting and blowing to obtain a molten crude gold-silver alloy for about 8t, reducing the temperature in the furnace to 914 ℃, adding 50kg of solid sodium hydroxide and 300kg of quartz into the molten crude gold-silver alloy, heating to 1150-1250 ℃ for reaction for 1.5-2 h, and standing for 0.5-1 h for slag skimming;
(2) And (3) removing tellurium secondarily: after slag skimming, obtaining about 5.5t of crude gold-silver alloy after primary tellurium removal, adding 65kg of solid sodium hydroxide and 200kg of quartz into the crude gold-silver alloy after primary tellurium removal, heating to 1150-1250 ℃ to react for 1.5-2 h, and standing for 0.5-1 h for slag skimming;
(3) Tellurium removal for three times: and (3) after slag skimming, obtaining about 4t of coarse gold-silver alloy after secondary tellurium removal, adding 50kg of sodium hydroxide into the coarse gold-silver alloy after secondary tellurium removal, heating to 1150-1250 ℃ for reaction for 1.5-2 h, standing for 0.5-1 h, skimming, and finally obtaining the gold-silver alloy with the impurity element tellurium content of 0.0066%.
Claims (6)
1. A method for removing tellurium from copper anode slime leaching residues, comprising the following steps:
(1) Removing tellurium at a time: 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 solid sodium hydroxide and quartz into the molten crude gold-silver alloy, heating to 1150-1250 ℃ for reacting for 1.5-2 h, and standing for 0.5-1 h for slag skimming;
(2) And (3) removing tellurium secondarily: after slag skimming, the temperature in the Kaldo furnace is reduced to 850-950 ℃, solid sodium hydroxide and quartz are added into the crude gold-silver alloy after primary tellurium removal, the temperature is increased to 1150-1250 ℃ for reaction for 1.5-2 hours, and the mixture is kept stand for 0.5-1 hour for slag skimming;
(3) Tellurium removal for three times: and after slag skimming, the temperature in the Kaldo furnace is reduced to 850-950 ℃, solid sodium hydroxide is added into the coarse gold-silver alloy after the tellurium removal for the second time, the temperature is raised to 1150-1250 ℃ for reaction for 1.5-2 hours, and the mixture is kept stand for 0.5-1 hour for slag skimming, and finally the gold-silver alloy after the tellurium removal is obtained.
2. A method for removing tellurium from copper anode slime leaching residue as claimed in claim 1, wherein: in the step (1), the mass ratio of the solid sodium hydroxide to the crude gold-silver alloy is 1:100-160.
3. A method for removing tellurium from copper anode slime leaching residue as claimed in claim 1, wherein: in the step (1), the mass ratio of quartz to crude gold-silver alloy is 1:26-32.
4. A method for removing tellurium from copper anode slime leaching residue as claimed in claim 1, wherein: in the step (2), the mass ratio of the solid sodium hydroxide to the crude gold-silver alloy is 1:80-120.
5. A method for removing tellurium from copper anode slime leaching residue as claimed in claim 1, wherein: in the step (2), the mass ratio of quartz to crude gold-silver alloy is 1:25-30.
6. A method for removing tellurium from copper anode slime leaching residue as claimed in claim 1, wherein: in the step (3), the mass ratio of the solid sodium hydroxide to the crude gold-silver alloy is 1:80-160.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210232698.4A CN114807623B (en) | 2022-03-10 | 2022-03-10 | Method for removing tellurium from copper anode slime leaching residues |
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| CN202210232698.4A CN114807623B (en) | 2022-03-10 | 2022-03-10 | Method for removing tellurium from copper anode slime leaching residues |
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| CN114807623A CN114807623A (en) | 2022-07-29 |
| CN114807623B true CN114807623B (en) | 2023-09-22 |
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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 |