CN114807623A - Method for removing tellurium from copper anode mud leaching slag - Google Patents
Method for removing tellurium from copper anode mud leaching slag Download PDFInfo
- Publication number
- CN114807623A CN114807623A CN202210232698.4A CN202210232698A CN114807623A CN 114807623 A CN114807623 A CN 114807623A CN 202210232698 A CN202210232698 A CN 202210232698A CN 114807623 A CN114807623 A CN 114807623A
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- China
- Prior art keywords
- tellurium
- silver alloy
- gold
- copper anode
- sodium hydroxide
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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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- 229910052714 tellurium Inorganic materials 0.000 title claims abstract description 58
- PORWMNRCUJJQNO-UHFFFAOYSA-N tellurium atom Chemical compound [Te] PORWMNRCUJJQNO-UHFFFAOYSA-N 0.000 title claims abstract description 58
- 239000002893 slag Substances 0.000 title claims abstract description 28
- 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
- 238000010438 heat treatment Methods 0.000 claims description 15
- 238000003723 Smelting Methods 0.000 claims description 6
- 229910052709 silver Inorganic materials 0.000 abstract description 4
- 239000004332 silver Substances 0.000 abstract description 4
- 238000007664 blowing Methods 0.000 abstract description 3
- 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
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 3
- 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
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009856 non-ferrous metallurgy Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
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Classifications
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- 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 mud leaching slag, which comprises the steps of adding a proper amount of solid sodium hydroxide into molten crude gold-silver alloy by adopting a Kaldo furnace smelting-converting method to react with quartz for three times to remove tellurium, and removing generated converted tellurium slag to obtain the gold-silver alloy with low tellurium content. After the crude gold-silver alloy is subjected to tellurium removal, the tellurium content in the gold-silver alloy reaches a very low level, the tellurium removal effect is ideal, gold and silver with the content of more than 97 percent enter the gold-silver alloy with low tellurium content in the blowing process, the tellurium content can be removed to be below 0.015 percent, and the purer gold-silver alloy is obtained, so that the operation is rapid, 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 metallurgy, and particularly relates to a method for removing tellurium from copper anode slime leaching slag.
Background
The main treatment process of the existing copper anode slime is a process combining a wet method and a fire method, leached residues of the copper anode slime are dried and then enter a Kaldo furnace to produce gold-silver alloy through smelting, blowing and refining, wherein the content of impurity elements tellurium 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 blowing period, high labor intensity of the flux preparation operation of workers, high flux consumption cost and great difficulty in treatment of copper anode mud leaching slag.
Disclosure of Invention
The invention aims at the defects of the prior art and provides a method for removing tellurium from copper anode slime leaching slag, so that the content of tellurium in gold-silver alloy is lower, the operation is quick, the operation efficiency is high, the labor intensity is low, and the production cost is low.
The purpose of the invention is realized by the following technical scheme:
a method for removing tellurium from copper anode slime leaching slag is characterized by comprising the following steps:
(1) primary tellurium removal: adding the copper anode mud leaching slag into a Kaldo furnace, smelting and converting to obtain molten crude gold-silver alloy, reducing the temperature in 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) secondary tellurium removal: and after slagging off, adding solid sodium hydroxide and quartz into the crude gold-silver alloy subjected to primary tellurium removal, heating to 1150-1250 ℃, reacting for 1.5-2 h, standing for 0.5-1 h, and slagging off. Wherein the mass ratio of the solid sodium hydroxide to the crude gold-silver alloy subjected to primary tellurium removal is 1: 80-120; the mass ratio of the quartz to the crude gold-silver alloy subjected to the primary tellurium removal is 1: 25-30.
(3) Removing tellurium for three times: and after slagging off, adding solid sodium hydroxide into the crude gold-silver alloy subjected to secondary tellurium removal, heating to 1150-1250 ℃, reacting for 1.5-2 h, standing for 0.5-1 h, and slagging off to obtain the gold-silver alloy subjected to tellurium removal. Wherein the mass ratio of the solid sodium hydroxide to the crude gold-silver alloy subjected to secondary tellurium removal is 1: 80-160.
The invention has the following advantages:
(1) after the tellurium of the crude gold-silver alloy is removed, the tellurium content in the gold-silver alloy reaches a very low level, the removal effect of the tellurium is ideal, and the tellurium content can be removed to be below 0.015 percent, so that the purer gold-silver alloy is obtained;
(2) in the Kaldo furnace converting process, 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 diagram of a process flow of a method for removing tellurium from copper anode slime leaching residue.
Detailed Description
The present invention will be further described with reference to the following specific examples.
Example 1
(1) Primary tellurium removal: adding 60t of copper anode mud leaching slag into a Kaldo furnace, smelting and converting to obtain about 8t of molten crude gold-silver alloy, reducing 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 ℃, reacting for 1.5-2 h, standing for 0.5-1 h, and removing slag;
(2) and (3) secondary tellurium removal: slagging off to obtain about 5.5t of the crude gold-silver alloy subjected to primary tellurium removal, adding 50kg of solid sodium hydroxide and 200kg of quartz into the crude gold-silver alloy subjected to primary tellurium removal, heating to 1150-1250 ℃, reacting for 1.5-2 h, standing for 0.5-1 h, and slagging off;
(3) removing tellurium for three times: and removing slag to obtain about 4t of the secondary tellurium-removed crude gold-silver alloy, adding 25kg of solid sodium hydroxide into the secondary tellurium-removed crude gold-silver alloy, heating to 1150-1250 ℃, reacting for 1.5-2 h, standing for 0.5-1 h, removing slag, and finally obtaining the gold-silver alloy with 0.0040% of impurity element tellurium.
Example 2
(1) Primary tellurium removal: adding 62t of copper anode mud leaching slag into a Kaldo furnace, smelting and converting to obtain about 8t of molten crude gold-silver alloy, reducing the temperature in the furnace to 935 ℃, adding 65kg of solid sodium hydroxide and 250kg of quartz into the molten crude gold-silver alloy, heating to 1150-1250 ℃, reacting for 1.5-2 h, standing for 0.5-1 h, and removing slag;
(2) and (3) secondary tellurium removal: slagging off to obtain about 5.5t of the primary tellurium-removed crude gold-silver alloy, adding 65kg of solid sodium hydroxide and 200kg of quartz into the primary tellurium-removed crude gold-silver alloy, heating to 1150-1250 ℃, reacting for 1.5-2 h, standing for 0.5-1 h, and slagging off;
(3) removing tellurium for three times: removing slag to obtain about 4t of crude gold-silver alloy after secondary tellurium removal, adding 40kg of solid sodium hydroxide into the crude gold-silver alloy after secondary tellurium removal, heating to 1150-1250 ℃, reacting for 1.5-2 h, standing for 0.5-1 h
Slagging off, and finally obtaining the gold-silver alloy with 0.0038 percent of impurity element tellurium.
Example 3
(1) Primary tellurium removal: adding 65t of copper anode mud leaching slag into a Kaldo furnace, smelting and converting to obtain about 8t of molten crude gold-silver alloy, cooling 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 ℃, reacting for 1.5-2 h, standing for 0.5-1 h, and removing slag;
(2) and (3) secondary tellurium removal: slagging off to obtain about 5.5t of the primary tellurium-removed crude gold-silver alloy, adding 65kg of solid sodium hydroxide and 200kg of quartz into the primary tellurium-removed crude gold-silver alloy, heating to 1150-1250 ℃, reacting for 1.5-2 h, standing for 0.5-1 h, and slagging off;
(3) removing tellurium for three times: and removing slag to obtain about 4t of the secondary tellurium-removed crude gold-silver alloy, adding 50kg of sodium hydroxide into the secondary tellurium-removed crude gold-silver alloy, heating to 1150-1250 ℃, reacting for 1.5-2 h, standing for 0.5-1 h, removing slag, and finally obtaining the gold-silver alloy with 0.0066% of impurity element tellurium.
Claims (6)
1. A method for removing tellurium from copper anode slime leaching slag comprises the following steps:
(1) primary tellurium removal: adding copper anode mud leaching slag into a Kaldo furnace, smelting and converting to obtain molten crude gold-silver alloy, reducing the temperature in 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, standing for 0.5-1 h, and slagging off;
(2) removing tellurium for the second time: after slagging off, reducing the temperature in the Kaldo furnace to 850-950 ℃, adding solid sodium hydroxide and quartz into the crude gold-silver alloy subjected to primary tellurium removal, heating to 1150-1250 ℃, reacting for 1.5-2 h, and standing for 0.5-1 h to slagging off;
(3) removing tellurium for three times: and after slagging off, reducing the temperature in the Kaldo furnace to 850-950 ℃, adding solid sodium hydroxide into the crude gold-silver alloy subjected to secondary tellurium removal, heating to 1150-1250 ℃, reacting for 1.5-2 h, standing for 0.5-1 h, and slagging off to obtain the tellurium-removed gold-silver alloy.
2. The method for removing tellurium from copper anode slime leaching slag according to claim 1, which is characterized in that: in the step (1), the mass ratio of the solid sodium hydroxide to the crude gold-silver alloy is 1: 100-160.
3. The method for removing tellurium from copper anode slime leaching slag according to claim 1, which is characterized in that: in the step (1), the mass ratio of quartz to the crude gold-silver alloy is 1: 26-32.
4. The method for removing tellurium from copper anode slime leaching slag according to claim 1, which is characterized in that: in the step (2), the mass ratio of the solid sodium hydroxide to the crude gold-silver alloy is 1: 80-120.
5. The method for removing tellurium from copper anode slime leaching slag according to claim 1, which is characterized in that: in the step (2), the mass ratio of quartz to the crude gold-silver alloy is 1: 25-30.
6. The method for removing tellurium from copper anode slime leaching slag according to claim 1, which is characterized in that: in the step (3), the mass ratio of the solid sodium hydroxide to the crude gold-silver alloy is 1: 80-160.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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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| CN114807623B CN114807623B (en) | 2023-09-22 |
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2022
- 2022-03-10 CN CN202210232698.4A patent/CN114807623B/en active Active
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