CN113981231A - Process for recovering lead, bismuth, gold and silver from copper anode slime smelting slag - Google Patents
Process for recovering lead, bismuth, gold and silver from copper anode slime smelting slag Download PDFInfo
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- CN113981231A CN113981231A CN202111291582.XA CN202111291582A CN113981231A CN 113981231 A CN113981231 A CN 113981231A CN 202111291582 A CN202111291582 A CN 202111291582A CN 113981231 A CN113981231 A CN 113981231A
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- bismuth
- lead
- silver
- gold
- smelting
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- 238000003723 Smelting Methods 0.000 title claims abstract description 74
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 61
- 229910052797 bismuth Inorganic materials 0.000 title claims abstract description 60
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 60
- 239000010949 copper Substances 0.000 title claims abstract description 60
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 title claims abstract description 52
- 239000002893 slag Substances 0.000 title claims abstract description 51
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 title claims abstract description 46
- 229910052709 silver Inorganic materials 0.000 title claims abstract description 46
- 239000004332 silver Substances 0.000 title claims abstract description 46
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 title claims abstract description 35
- 229910052737 gold Inorganic materials 0.000 title claims abstract description 35
- 239000010931 gold Substances 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 35
- 229910052751 metal Inorganic materials 0.000 claims abstract description 10
- 229910001316 Ag alloy Inorganic materials 0.000 claims abstract description 9
- PQTCMBYFWMFIGM-UHFFFAOYSA-N gold silver Chemical compound [Ag].[Au] PQTCMBYFWMFIGM-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000007670 refining Methods 0.000 claims abstract description 8
- 239000002184 metal Substances 0.000 claims abstract description 7
- 150000002739 metals Chemical class 0.000 claims abstract description 4
- 238000005868 electrolysis reaction Methods 0.000 claims description 8
- 239000012535 impurity Substances 0.000 claims description 7
- 238000005266 casting Methods 0.000 claims description 4
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 3
- 239000011133 lead Substances 0.000 abstract description 50
- 238000011084 recovery Methods 0.000 abstract description 9
- 239000000428 dust Substances 0.000 abstract description 5
- 239000000779 smoke Substances 0.000 abstract description 5
- 229910052787 antimony Inorganic materials 0.000 abstract description 3
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 abstract description 3
- 238000007664 blowing Methods 0.000 abstract description 2
- 239000002920 hazardous waste Substances 0.000 abstract description 2
- 229910001152 Bi alloy Inorganic materials 0.000 description 5
- 239000002699 waste material Substances 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- QRJOYPHTNNOAOJ-UHFFFAOYSA-N copper gold Chemical compound [Cu].[Au] QRJOYPHTNNOAOJ-UHFFFAOYSA-N 0.000 description 2
- 239000010970 precious metal Substances 0.000 description 2
- 229910001112 rose gold Inorganic materials 0.000 description 2
- -1 Jinchuan Chemical compound 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- CCXYPVYRAOXCHB-UHFFFAOYSA-N bismuth silver Chemical compound [Ag].[Bi] CCXYPVYRAOXCHB-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000001698 pyrogenic effect Effects 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 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
- 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
-
- 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
- C22B13/00—Obtaining lead
- C22B13/02—Obtaining lead by dry processes
- C22B13/025—Recovery 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
- C22B30/00—Obtaining antimony, arsenic or bismuth
- C22B30/06—Obtaining bismuth
-
- 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
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C1/00—Electrolytic production, recovery or refining of metals by electrolysis of solutions
- C25C1/18—Electrolytic production, recovery or refining of metals by electrolysis of solutions of lead
-
- 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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- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
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- Chemical Kinetics & Catalysis (AREA)
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Abstract
The invention belongs to the technical field of metal smelting slag recovery, in particular to a process for recovering lead, bismuth, gold and silver from copper anode slime smelting slag, which solves the problems that in the prior art, when a copper system converter is used for treating the copper anode slime smelting slag, valuable metal elements such as gold and silver, lead, antimony, bismuth and the like in the copper anode slime smelting slag are only recovered and enter smelting smoke dust to become hazardous waste, the recovery process is complex again, and the cost is high, and the process for recovering the lead, the bismuth, the gold and the silver from the copper anode slime smelting slag comprises the following steps: the method comprises the steps of treating high-lead slag by using a lead smelting side-blown converter, simultaneously matching copper anode mud smelting slag, reducing valuable metals in the copper anode mud smelting slag into crude lead, electrolyzing the crude lead to obtain anode mud, separating the anode mud after reduction smelting to obtain crude bismuth and gold-silver alloy, refining the crude bismuth to obtain finished bismuth, and returning the gold-silver alloy to the converter for blowing to produce a silver anode plate. The invention has the advantages of simple recovery method, low treatment cost, high treatment efficiency and the like, and is worthy of popularization and application.
Description
Technical Field
The invention relates to the technical field of metal smelting slag recovery, in particular to a process for recovering lead, bismuth, gold and silver from copper anode slime smelting slag.
Background
The smelting slag of the copper anode slime is produced in the process of recovering gold and silver by treating the copper anode slime by adopting a main pyrometallurgical smelting process in a precious metal smelting plant, mainly comprises elements such as lead, antimony, bismuth, tin and the like, also contains 4000-5000g/t silver and 50-60g/t gold, and has extremely high value. In the copper smelting process, the yield of copper anode slime is about 0.2-1.0% of the weight of an anode plate, wet leaching is adopted for smelting the copper anode slime at present to remove copper to below 0.6%, then the copper anode slime is dried and enters a pyrometallurgical smelting furnace for smelting, generally, the charging material contains about 20% of lead, the smelting slag contains 27% of lead, more than 95% of lead enters the smelting slag after smelting and slagging, and part of gold and silver bismuth enters the smelting slag (containing 27-40% of lead, 5-10% of bismuth, 30-100g/t of gold and 8000g/t of silver), when the smelting slag containing more than 27% of lead returns to a copper smelting system for treatment, the lead can only be opened from smoke dust in the copper smelting process, the blowing load of copper matte is increased, the yield of smoke dust is increased inevitably, and the direct yield of copper and precious metals is influenced.
At present, the main domestic enterprises for smelting and treating the copper anode slime by adopting a pyrogenic process mainly comprise: copper smelting enterprises such as the copper smelting plants in the China gold smelting factories in Henan, the industries of copper, purple gold and copper, Yanggu auspicious copper, Jinchuan, silver and the like, and all the enterprises combine the main process characteristics of copper smelting, and the adopted treatment mode of the pyrometallurgical smelting slag can be basically classified into two treatment schemes: (1) returning to a copper smelting system per se and returning to a converter or a smelting furnace; the adopted enterprises mainly comprise the red gold copper industry, silver colored and original gold; (2) separately treating and recovering the lead-bismuth alloy; the adopted enterprises mainly comprise auspicious copper industry, Jinchuan company and the later stage of the red gold copper industry.
When copper anode slime smelting slag is treated by a traditional copper system converter, most of gold and silver in the smelting slag can be collected into blister copper by utilizing the characteristic of high gold and silver collection rate of copper, and the gold and silver recovery rate is high.
The Chinese patent publication No. CN109536730A discloses a method for extracting lead bismuth alloy from copper anode slime smelting waste slag, which comprises the steps of mixing the copper anode slime smelting waste slag with a flux, adding the mixture into a Kaldo furnace for reduction smelting, slagging off after the reduction smelting to obtain crude lead bismuth alloy, transferring the crude lead bismuth alloy melt to an intermediate frequency furnace, and then sequentially carrying out liquation to remove copper, sulfur and nickel, and zinc and silver to obtain refined lead bismuth alloy. The recovery rate of the lead and the bismuth obtained by the method is low. Based on the statement, the invention provides a process for recovering lead, bismuth, gold and silver from copper anode slime smelting slag.
Disclosure of Invention
The invention aims to solve the problems that in the prior art, when a copper system converter is used for treating copper anode slime smelting slag, valuable metal elements such as gold, silver, lead, antimony, bismuth and the like are only recovered to enter smelting smoke dust to become hazardous waste, the secondary recovery process is complex, and the cost is high, and provides a process for recovering lead, bismuth, gold and silver from the copper anode slime smelting slag.
A process for recovering lead, bismuth, gold and silver from copper anode slime smelting slag comprises the following steps:
s1, treating the high-lead slag by using a lead smelting side-blown furnace, simultaneously matching copper anode slime smelting slag, and reducing valuable metals in the copper anode slime smelting slag into crude lead by using strong reducing atmosphere of the side-blown furnace;
s2, the crude lead enters electrolysis through a casting anode plate, lead is recovered in the electrolysis process, and bismuth, gold and silver enter anode mud;
s3, carrying out reduction smelting on the anode mud to produce high-bismuth precious lead, and separating the high-bismuth precious lead in a vacuum furnace to obtain crude bismuth and gold-silver alloy;
s4, refining and impurity removing are carried out on the separated crude bismuth to produce refined bismuth, the silver removing operation is not carried out in the bismuth refining process, and the direct yield of finished bismuth can reach more than 85%;
and S5, returning the separated gold-silver alloy to the converter for converting to produce the silver anode plate.
Preferably, the residual slag except the lead bullion in the step S1 is discharged through a fuming furnace.
Preferably, the lead recovered in the step S2 is cast after removing impurities to obtain a lead ingot.
Preferably, the silver content of the crude bismuth separated in the step S3 is less than or equal to 10 g/t.
The process for recovering lead, bismuth, gold and silver from the copper anode slime smelting slag has the following beneficial effects:
1. the method utilizes the lead smelting side-blown converter to treat the copper anode slime smelting slag, the treatment cost of the procedure is about 600 yuan/ton, and compared with the treatment cost of 1500 yuan/ton for treating the Kaldo furnace by utilizing a copper converter in the prior art, the treatment cost can be saved by more than 900 yuan/ton; according to the invention, the high-lead slag is treated by using the lead smelting side-blown furnace, the copper anode slime smelting slag is treated at the same time, no additional equipment or additional new treating agent is required, and the crude lead obtained by the side-blown furnace treatment can directly enter a lead electrolysis system to recover and produce lead ingots.
2. Bismuth, gold and silver in copper anode slime smelting slag enter anode slime after electrolytic treatment, the anode slime is subjected to reduction smelting, wherein metal bismuth, gold and silver are enriched in high-bismuth precious lead, the high-bismuth precious lead enters a vacuum furnace to be smelted and separated into crude bismuth with the direct yield of more than 95% and gold-silver alloy with the direct yield of more than 99%, and the silver content of the crude bismuth is less than 10 g/t; refined bismuth is produced by refining and impurity removal, and the direct yield of finished bismuth in the section reaches more than 85 percent. Returning the gold and silver to the converter for converting to produce the anode plate required by silver electrolysis.
In conclusion, the process for recovering lead, bismuth, gold and silver from the copper anode slime smelting slag provided by the invention can effectively recover metal elements such as lead, bismuth, gold and silver in the copper anode slime smelting slag, can effectively reduce the yield of smoke dust in the recovery process, has the advantages of simple recovery method, low treatment cost, high treatment efficiency and the like, and is worthy of popularization and application.
Drawings
FIG. 1 is a process flow diagram for recovering lead, bismuth, gold and silver from copper anode slime smelting slag according to the present invention.
Detailed Description
The invention will be further illustrated with reference to a specific embodiment with reference to fig. 1.
Example one
The invention provides a process for recovering lead, bismuth, gold and silver from copper anode slime smelting slag, which comprises the following steps:
s1, treating the high-lead slag by using a lead smelting side-blown furnace, simultaneously matching copper anode slime smelting slag, reducing valuable metals in the copper anode slime smelting slag into crude lead by using a strong reducing atmosphere of the side-blown furnace, and discharging residual waste slag except the crude lead through a fuming furnace;
s2, feeding the crude lead into electrolysis through a casting anode plate, recovering lead in the electrolysis process, casting the recovered lead after impurity removal to obtain a lead ingot, and feeding bismuth, gold and silver into anode mud;
s3, carrying out reduction smelting on the anode mud to produce high-bismuth precious lead, and separating the high-bismuth precious lead in a vacuum furnace to obtain crude bismuth with a direct yield of more than 95% and a gold-silver alloy with a direct yield of more than 99%, wherein the silver content of the crude bismuth is less than 10 g/t;
s4, refining and impurity removing are carried out on the separated crude bismuth to produce refined bismuth, the silver removing operation is not carried out in the bismuth refining process, and the direct yield of finished bismuth can reach more than 85%;
and S5, returning the separated gold-silver alloy to the converter for converting to produce the silver anode plate.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (4)
1. A process for recovering lead, bismuth, gold and silver from copper anode slime smelting slag is characterized by comprising the following steps:
s1, treating the high-lead slag by using a lead smelting side-blown furnace, simultaneously matching copper anode slime smelting slag, and reducing valuable metals in the copper anode slime smelting slag into crude lead by using strong reducing atmosphere of the side-blown furnace;
s2, the crude lead enters electrolysis through a casting anode plate, lead is recovered in the electrolysis process, and bismuth, gold and silver enter anode mud;
s3, carrying out reduction smelting on the anode mud to produce high-bismuth precious lead, and separating the high-bismuth precious lead in a vacuum furnace to obtain crude bismuth and gold-silver alloy;
s4, refining and impurity removing are carried out on the separated crude bismuth to produce refined bismuth, the silver removing operation is not carried out in the bismuth refining process, and the direct yield of finished bismuth can reach more than 85%;
and S5, returning the separated gold-silver alloy to the converter for converting to produce the silver anode plate.
2. The process for recovering lead, bismuth, gold and silver from copper anode slime smelting slag according to claim 1, wherein the residual slag in step S1 except the crude lead is discharged through a fuming furnace.
3. The process for recovering lead, bismuth, gold and silver from copper anode slime smelting slag according to claim 1, wherein the lead recovered in the step S2 is subjected to impurity removal and then cast to obtain a lead ingot.
4. The process for recovering lead, bismuth, gold and silver from copper anode slime smelting slag according to claim 1, wherein the silver content of the crude bismuth separated in the step S3 is below 10 g/t.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111291582.XA CN113981231A (en) | 2021-11-03 | 2021-11-03 | Process for recovering lead, bismuth, gold and silver from copper anode slime smelting slag |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111291582.XA CN113981231A (en) | 2021-11-03 | 2021-11-03 | Process for recovering lead, bismuth, gold and silver from copper anode slime smelting slag |
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| Publication Number | Publication Date |
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| CN113981231A true CN113981231A (en) | 2022-01-28 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114774708A (en) * | 2022-03-10 | 2022-07-22 | 金川集团股份有限公司 | Method for refining and removing copper from copper anode mud leaching slag |
| CN115341107A (en) * | 2022-08-24 | 2022-11-15 | 蒙自矿冶有限责任公司 | Efficient recovery process method for lead smelting bismuth metal |
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| WO2019071794A1 (en) * | 2017-10-10 | 2019-04-18 | 东北大学 | Method for recovering valuable components from mixed slag containing copper and iron |
| CN111020206A (en) * | 2019-11-19 | 2020-04-17 | 铜陵有色金属集团股份有限公司 | Method for comprehensively recovering lead-antimony-bismuth-containing materials such as Kaldo furnace smelting slag |
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2021
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114774708A (en) * | 2022-03-10 | 2022-07-22 | 金川集团股份有限公司 | Method for refining and removing copper from copper anode mud leaching slag |
| CN114774708B (en) * | 2022-03-10 | 2023-09-22 | 金川集团股份有限公司 | Method for refining copper-removing from copper anode slime leaching slag |
| CN115341107A (en) * | 2022-08-24 | 2022-11-15 | 蒙自矿冶有限责任公司 | Efficient recovery process method for lead smelting bismuth metal |
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