CN110607441A - Method for recovering indium from lead copper matte - Google Patents
Method for recovering indium from lead copper matte Download PDFInfo
- Publication number
- CN110607441A CN110607441A CN201910981748.7A CN201910981748A CN110607441A CN 110607441 A CN110607441 A CN 110607441A CN 201910981748 A CN201910981748 A CN 201910981748A CN 110607441 A CN110607441 A CN 110607441A
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- indium
- leaching
- oxygen pressure
- lead
- electrodeposition
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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
- C22B15/00—Obtaining copper
- C22B15/0063—Hydrometallurgy
- C22B15/0065—Leaching or slurrying
- C22B15/0067—Leaching or slurrying with acids or salts thereof
- C22B15/0071—Leaching or slurrying with acids or salts thereof containing sulfur
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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
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/04—Extraction of metal compounds from ores or concentrates by wet processes by leaching
- C22B3/06—Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic acid solutions, e.g. with acids generated in situ; in inorganic salt solutions other than ammonium salt solutions
- C22B3/08—Sulfuric acid, other sulfurated acids or salts thereof
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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
- C22B58/00—Obtaining gallium or indium
-
- 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
- C25C1/12—Electrolytic production, recovery or refining of metals by electrolysis of solutions of copper
-
- 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
Abstract
The invention provides a method for recovering indium from lead copper matte. The lead matte treated by air quenching, water cooling and wet ball mill ball milling and crushing is leached by adopting leaching agent oxygen pressure, leached leaching slag is returned to a lead smelting system, the leached leaching solution is subjected to high-efficiency electrodeposition, electrolytic copper is directly sold for external use, and the electrolyte is subjected to rotational flow electrodeposition to obtain a secondary electrolytic copper product and a secondary electrolyte, In3+When the concentration is less than 1g/l, the secondary electrolyte returns to the oxygen pressure leaching, and after the continuous cyclic utilization and repeated oxygen pressure leaching of the electrolyte, when In3+When the concentration reaches 1g/l or more, indium is recovered. The invention adopts the electrolyte to recycle and the oxygen pressure leaching is repeated, so that In is obtained3+Is enriched when In3+When the concentration reaches 1g/l or more, the indium is sent into an indium wet production system to recover the indium, no additional indium treatment process is needed, no intermediate link is needed, the loss of the indium is avoided, no impurity interference exists, the process is simple, and the method is suitable for the application of indium recovery.
Description
Technical Field
The invention relates to metal element recovery in the field of pyrometallurgical lead smelting, in particular to recovery of an indium metal element.
Background
At present, in the production process of pyrometallurgical lead smelting, the produced intermediate product lead copper matte contains indium in addition to main metal elements of lead and copper. Lead copper matte is a main enrichment source of indium, the indium is a valuable metal element, and the recovery of the indium can create economic benefits, so that the indium in the process of treating the lead copper matte also needs to be recovered. The pyrogenic process for treating lead copper matte has the advantages of environmental pollution and low efficiency, and indium in the lead copper matte cannot be effectively recovered. The lead copper matte is treated by a wet method, so that the requirements of high efficiency and clean metallurgy technology are met. Although indium is effectively enriched in lead copper matte in the production process of lead pyrometallurgy, the indium content in the lead copper matte is still low, the indium content is between 0.1 and 0.2 percent, and the indium content in the solution is still very low along with the primary wet treatment process of the lead copper matte, so that the production requirements of an indium wet production system cannot be met, and the difficulty in indium recovery is caused.
Disclosure of Invention
The invention provides a method for recovering indium from lead copper matte, which aims to recover indium from lead copper matte with low indium content grade by wet treatment. The method comprises the steps of carrying out oxygen pressure leaching by using sulfuric acid as a leaching agent, carrying out high-efficiency electrodeposition and cyclone electrodeposition on a leaching solution, recycling an electrolyte, and repeatedly carrying out oxygen pressure leaching to ensure that In is contained3+Is enriched when In3+When the concentration reaches 1g/l or more, the solution is processed in an open circuit and sent to an indium wet production system to recover indiumAnd the technical problem of recovering indium from lead copper matte is solved.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the lead matte treated by air quenching, water cooling and wet ball mill ball milling and crushing is leached by adopting a leaching agent oxygen pressure, leached slag, namely lead slag containing silver and gold, is returned to a lead smelting system to recover precious metals, leached leaching solution, namely copper sulfate solution containing indium is subjected to high-efficiency electrodeposition, a solid product after the high-efficiency electrodeposition is directly sold by electrolytic copper, electrolyte after the high-efficiency electrodeposition is subjected to rotational flow electrodeposition to obtain a secondary electrolytic copper product and secondary electrolyte, and In the secondary electrolyte3+Recycling indium liquid when the concentration is less than 1g/l, and leaching the liquid In3+The concentration is low, the secondary electrolyte returns to the oxygen pressure leaching process and enters the next oxygen pressure leaching process; in is leached out by continuous cyclic utilization and repeated oxygen pressure of electrolyte3+The concentration is continuously improved, and the indium liquid produced by the indium wet method is changed into In3+When the concentration reaches 1g/l or more, the solution is processed in an open circuit mode, the indium is sent to an indium wet production system for indium recovery, the whole production system is supplemented with new solution, and the next lead matte processing process and indium enrichment process are carried out.
Further, the leaching agent is sulfuric acid.
Further, the temperature of the oxygen pressure leaching is controlled to be 140-160 ℃, and the oxygen pressure is controlled to be 0.8-1.4 MPa.
The invention has the advantages that as the invention adopts the oxygen pressure leaching with the sulfuric acid as the leaching agent, the In is obtained by the leaching solution through the high-efficiency electrodeposition and the rotary electrodeposition, the electrolyte is recycled and the oxygen pressure leaching is repeated3+Is enriched when In3+When the concentration reaches 1g/l or above, the solution is subjected to open-circuit treatment and is sent to an indium wet production system to recover indium.
Drawings
FIG. 1 is a flow chart of indium recovery from lead matte.
In the figure, 1, lead matte, 2, air quenching and water cooling, 3, ball milling and crushing, 4, oxygen pressure leaching, 5, leaching slag, 6, leaching liquid, 7, lead return smelting, 8, high-efficiency electrodeposition, 9, electrolytic copper, 10, electrolyte, 11, outsourcing, 12, rotational flow electrodeposition, 13, secondary electrolytic copper, 14, secondary electrolyte, 15, indium wet production liquid indium, 16, recycling liquid indium, and 17, indium recovery.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
According to the figure, lead copper matte 1 treated by air quenching and water cooling 2 and ball milling and crushing 3 of a wet ball mill is subjected to oxygen pressure leaching 4 by using sulfuric acid as a leaching agent, the temperature of the oxygen pressure leaching is controlled to be 140-160 ℃, the oxygen pressure is 0.8-1.4 MPa, leached slag 5, namely lead slag containing silver and gold is returned to a lead smelting 7 system to recover precious metals, leached leaching solution 6, namely copper sulfate solution containing indium, is subjected to high-efficiency electrodeposition 8, solid product electrolytic copper 9 after the high-efficiency electrodeposition is directly sold out 11, electrolyte 10 after the high-efficiency electrodeposition is subjected to rotational flow electrodeposition 12 to obtain secondary electrolytic copper 13 products and secondary electrolyte 14, the potential of the indium is low in the electrodeposition process, the indium cannot be discharged and separated out at a cathode, the indium is left in the secondary electrolyte, and the secondary electrolyte is returned to the oxygen pressure leaching and enters the next leaching process. In the whole process of lead matte3+In the form of a liquid, i.e. leachate and electrolyte, In3 +Recycling the indium 16 when the concentration is less than 1g/l, and initially leaching the In3+Low concentration, passing through the electrolyteContinuous cyclic utilization of In3+The concentration is continuously improved, and the indium 15 In liquid produced by the indium wet method is used as In3+When the concentration reaches 1g/l or more, the solution is processed in an open circuit mode, the solution is sent to an indium wet production system for indium recovery 17, the whole production system is supplemented with new solution, and the next lead matte processing process and indium enrichment process are carried out.
Example 1:
when the first oxygen pressure leaching is carried out, the indium content of lead copper matte is 0.14 percent, the indium concentration of the first leaching solution is 0.21g/l, and the electrolyte produced by the first leaching solution through high-efficiency electrodeposition and cyclone electrodeposition enters the second leaching;
when the lead copper matte contains 0.11 percent of indium during the second oxygen pressure leaching, the concentration of the indium in the secondary leaching solution is 0.37g/l, and the electrolyte produced by the secondary leaching solution through high-efficiency electrodeposition and cyclone electrodeposition enters the third leaching;
when the third oxygen pressure leaching is carried out, the indium content of the lead copper matte is 0.12 percent, the indium concentration of the third leaching solution is 0.55g/l, and the electrolyte produced by the third leaching solution through high-efficiency electrodeposition and cyclone electrodeposition enters four times of leaching;
when the fourth oxygen pressure leaching is carried out, the indium content of the lead copper matte is 0.11 percent, the indium concentration of the fourth leaching solution is 0.71g/l, and the electrolyte produced by the fourth leaching solution through high-efficiency electrodeposition and cyclone electrodeposition enters the fifth leaching;
during the fifth oxygen pressure leaching, the lead copper matte contains 0.14 percent of indium, the concentration of the indium in the fifth leaching solution is 0.92g/l, and the electrolyte produced by the fifth leaching solution through high-efficiency electrodeposition and cyclone electrodeposition enters six times of leaching;
when the lead copper matte contains 0.12 percent of indium during the sixth oxygen pressure leaching, the concentration of the indium in the sixth leaching solution is 1.08g/l, the requirement of indium production is met, the enrichment process is completed once, and the lead copper matte enters an indium production system in an open circuit mode.
Example 2:
when the first oxygen pressure leaching is carried out, the indium content of the lead copper matte is 0.12 percent, the indium concentration of the primary leaching solution is 0.18g/l, and the electrolyte produced by the primary leaching solution through high-efficiency electrodeposition and cyclone electrodeposition enters the secondary leaching;
when the lead copper matte contains 0.14 percent of indium during the second oxygen pressure leaching, the concentration of the indium in the secondary leaching solution is 0.36g/l, and the electrolyte produced by the secondary leaching solution through high-efficiency electrodeposition and cyclone electrodeposition enters the third leaching;
when the third oxygen pressure leaching is carried out, the indium content of the lead copper matte is 0.13 percent, the indium concentration of the third leaching solution is 0.57g/l, and the electrolyte produced by the third leaching solution through high-efficiency electrodeposition and cyclone electrodeposition enters four times of leaching;
when the fourth oxygen pressure leaching is carried out, the indium content of the lead copper matte is 0.17 percent, the indium concentration of the fourth leaching solution is 0.88g/l, and the electrolyte produced by the fourth leaching solution through high-efficiency electrodeposition and cyclone electrodeposition enters the fifth leaching;
and in the fifth oxygen pressure leaching, the content of indium in the lead copper matte is 0.19 percent, the concentration of indium in the fifth leaching solution is 1.01g/l, the requirement of indium production is met, one enrichment process is completed, and the lead copper matte enters an indium production system in an open circuit mode.
Example 3:
when the first oxygen pressure leaching is carried out, the content of indium in the lead copper matte is 0.16 percent, the concentration of indium in the primary leaching solution is 0.24g/l, and the electrolyte produced by the primary leaching solution through high-efficiency electrodeposition and cyclone electrodeposition enters the secondary leaching;
when the lead copper matte contains 0.16% of indium during the second oxygen pressure leaching, the concentration of the indium in the secondary leaching solution is 0.45g/l, and the electrolyte produced by the secondary leaching solution through high-efficiency electrodeposition and cyclone electrodeposition enters the third leaching;
when the third oxygen pressure leaching is carried out, the indium content of the lead copper matte is 0.13 percent, the indium concentration of the third leaching solution is 0.64g/l, and the electrolyte produced by the third leaching solution through high-efficiency electrodeposition and cyclone electrodeposition enters four times of leaching;
when the fourth oxygen pressure leaching is carried out, the indium content of the lead copper matte is 0.16 percent, the indium concentration of the fourth leaching solution is 0.86g/l, and the electrolyte produced by the fourth leaching solution through high-efficiency electrodeposition and cyclone electrodeposition enters the fifth leaching;
and in the fifth oxygen pressure leaching, the content of indium in the lead copper matte is 0.13%, the concentration of indium in the fifth leaching solution is 1.04g/l, the requirement of indium production is met, one enrichment process is completed, and the lead copper matte enters an indium production system in an open circuit mode.
Example 4:
when the first oxygen pressure leaching is carried out, the content of indium in the lead copper matte is 0.16 percent, the concentration of indium in the primary leaching solution is 0.24g/l, and the electrolyte produced by the primary leaching solution through high-efficiency electrodeposition and cyclone electrodeposition enters the secondary leaching;
when the lead copper matte contains 0.16% of indium during the second oxygen pressure leaching, the concentration of the indium in the secondary leaching solution is 0.45g/l, and the electrolyte produced by the secondary leaching solution through high-efficiency electrodeposition and cyclone electrodeposition enters the third leaching;
when the third oxygen pressure leaching is carried out, the indium content of the lead copper matte is 0.13 percent, the indium concentration of the third leaching solution is 0.64g/l, and the electrolyte produced by the third leaching solution through high-efficiency electrodeposition and cyclone electrodeposition enters four times of leaching;
when the fourth oxygen pressure leaching is carried out, the indium content of the lead copper matte is 0.17 percent, the indium concentration of the fourth leaching solution is 0.88g/l, and the electrolyte produced by the fourth leaching solution through high-efficiency electrodeposition and cyclone electrodeposition enters the fifth leaching;
and in the fifth oxygen pressure leaching, the content of indium in the lead copper matte is 0.12%, the concentration of indium in the fifth leaching solution is 1.04g/l, the requirement of indium production is met, one enrichment process is completed, and the lead copper matte enters an indium production system in an open circuit mode.
Example 5:
when the first oxygen pressure leaching is carried out, the indium content of the lead copper matte is 0.12 percent, the indium concentration of the primary leaching solution is 0.17g/l, and the electrolyte produced by the primary leaching solution through high-efficiency electrodeposition and cyclone electrodeposition enters the secondary leaching;
when the lead copper matte contains 0.15% of indium during the second oxygen pressure leaching, the concentration of the indium in the secondary leaching solution is 0.40g/l, and the electrolyte produced by the secondary leaching solution through high-efficiency electrodeposition and cyclone electrodeposition enters the third leaching;
when the third oxygen pressure leaching is carried out, the indium content of the lead copper matte is 0.11 percent, the indium concentration of the third leaching solution is 0.56g/l, and the electrolyte produced by the third leaching solution through high-efficiency electrodeposition and cyclone electrodeposition enters four times of leaching;
when the fourth oxygen pressure leaching is carried out, the indium content of the lead copper matte is 0.11 percent, the indium concentration of the fourth leaching solution is 0.71g/l, and the electrolyte produced by the fourth leaching solution through high-efficiency electrodeposition and cyclone electrodeposition enters the fifth leaching;
during the fifth oxygen pressure leaching, the lead copper matte contains 0.12 percent of indium, the concentration of the indium in the fifth leaching solution is 0.91g/l, and the electrolyte produced by the fifth leaching solution through high-efficiency electrodeposition and cyclone electrodeposition enters six times of leaching;
when the lead copper matte contains 0.14 percent of indium during the sixth oxygen pressure leaching, the concentration of the indium in the sixth leaching solution is 1.09g/l, the requirement of indium production is met, one enrichment process is completed, and the lead copper matte enters an indium production system in an open circuit mode.
The working principle of the invention is as follows:
in the whole process of lead matte3+In the form of a liquid, i.e. leachate and electrolyte, In3+Recycling indium liquid when the concentration is less than 1g/l, and performing oxygen pressure leaching to obtain initial leaching liquid In3+Low concentration, continuous cyclic utilization of electrolyte, In3+Is enriched and the concentration is continuously increased when In3+When the concentration reaches 1g/l or above, the solution is subjected to open-circuit treatment and sent to an indium wet production system for indium recovery, no additional indium treatment process is needed, no intermediate link is needed, the loss of indium is avoided, and no impurity interference exists.
The invention has the advantages that:
since when In3+The indium concentration of the electrolyte is recycled when the concentration is less than 1g/l, the electrolyte is recycled, and oxygen pressure leaching is repeated, so that In is obtained3+Is enriched so when In3+When the concentration reaches 1g/l or more, the indium wet production can be carried out, so that the indium in the lead copper matte with low indium content grade is recycled.
Because the indium treatment process is not required to be additionally added and no intermediate link exists, the method has no impurity interference and simple flow.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (3)
1. A method for recovering indium from lead matte is characterized in that: lead copper matte (1) treated by air quenching and water cooling (2) and ball milling and crushing (3) of a wet ball mill is leached by adopting a leaching agent oxygen pressure (4), and leached leaching slag (5), namely lead slag containing silver and gold, is returned to a lead smelting (7) systemComprehensively recovering noble metals, carrying out high-efficiency electrodeposition (8) on leachate (6) after leaching, namely copper sulfate solution containing indium, directly selling solid product electrolytic copper (9) after the high-efficiency electrodeposition (11), and carrying out rotational flow electrodeposition (12) on electrolyte (10) after the high-efficiency electrodeposition to obtain secondary electrolytic copper (13) products and secondary electrolyte (14), In3+Recycling the indium (16) when the concentration is less than 1g/l, and leaching the In3+The concentration is low, the secondary electrolyte returns to the oxygen pressure leaching process and enters the next oxygen pressure leaching process; in is leached out by continuous cyclic utilization and repeated oxygen pressure of electrolyte3+The concentration is continuously improved, and the indium (15) liquid produced by the indium wet method is used as In3+When the concentration reaches 1g/l or more, the solution is processed in an open circuit mode, the solution is sent to an indium wet production system for indium recovery (17), the whole production system is supplemented with new solution, and the next lead matte processing process and indium enrichment process are carried out.
2. The method for recovering indium from lead matte as claimed in claim 1, wherein: the leaching agent adopts sulfuric acid.
3. The method for recovering indium from lead matte as claimed in claim 1, wherein: the temperature of the oxygen pressure leaching is controlled to be 140-160 ℃, and the oxygen pressure is controlled to be 0.8-1.4 MPa.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| RU2752722C1 (en) * | 2020-12-04 | 2021-07-30 | Негосударственное частное образовательное учреждение высшего образования "Технический университет УГМК" | Method for processing lead cakes |
| CN114686696A (en) * | 2022-04-08 | 2022-07-01 | 万载志成实业有限公司 | Circulating copper recovery method based on waste diamond tool bits |
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Cited By (3)
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| RU2752722C1 (en) * | 2020-12-04 | 2021-07-30 | Негосударственное частное образовательное учреждение высшего образования "Технический университет УГМК" | Method for processing lead cakes |
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