CN101671833A - Method for recovering silver in alloyed scrap containing indium, cadmium and silver - Google Patents
Method for recovering silver in alloyed scrap containing indium, cadmium and silver Download PDFInfo
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- CN101671833A CN101671833A CN200910176431A CN200910176431A CN101671833A CN 101671833 A CN101671833 A CN 101671833A CN 200910176431 A CN200910176431 A CN 200910176431A CN 200910176431 A CN200910176431 A CN 200910176431A CN 101671833 A CN101671833 A CN 101671833A
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- 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
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Abstract
The invention relates to a method for recovering sliver in alloyed scrap containing indium, cadmium and silver, which is characterized by comprising the following steps: (1) alloyed scrap containing indium, cadmium and silver is packed into an anode basket to be used as an electrolytic anode, and the solution formed by using nitric acid for dissolving the alloyed scrap containing indium, cadmium and silver is taken as electrolyte, and electrolyzed silver is obtained by electrolysis to recover silver; and (2) electro deposition is carried out on the electrolyzed solution of step (1), and nitricacid is used for dissolving the sliver obtained from electro deposition to build fluid so as to return to the electrolytic process of step (1). The method of the invention combines the electrolytic process with the electro deposition process, and separates silver from indium and cadmium and purifies the separated silver. Compared with traditional nitric acid dissolving material, chloration silverdeposition and reductant reducing process, the method features simple and practicable process, low energy consumption, small reagent usage, good operation condition and environment protection.
Description
Technical field
The present invention relates to reclaim in a kind of alloyed scrap containing indium, cadmium the method for silver.
Background technology
Silver indium cadmium, silver-colored indium and silver-cadmium alloy all are special-purpose silver alloys raw materials, and the processing process of alloy can produce the leftover bits of some amount, it need be reclaimed and purify regeneration.The method that tradition reclaims the silver alloys leftover bits is: through nitric acid dissolve, the heavy silver of chlorination, reductive agent reduction or electrolysis after with silver chloride melting ingot casting.This procedure is more numerous and diverse, and energy consumption is big, and reagent consumption is many.Produce a large amount of flue gases, spent acid, processing cost height in the production.During the material dissolution precipitation, leaving more free acid, is unfavourable condition to extracting silver indium cadmium removal process afterwards.
Summary of the invention
The objective of the invention is the deficiency that exists at above-mentioned prior art, provide that a kind of process is simple, energy consumption is lower, reagent dosage is few, environmental protection and extract silver after solution composition do not influence the method that reclaims silver in the follow-up alloyed scrap containing indium, cadmium of pluging with molten metal the cadmium removal process.
The objective of the invention is to be achieved through the following technical solutions.
Reclaim the method for silver in a kind of alloyed scrap containing indium, cadmium, it is characterized in that the step of removal process comprises:
(1) alloyed scrap containing indium, cadmium is put into the anode basket and made electrolytic anode, the solution that forms with the nitric acid dissolve alloyed scrap containing indium, cadmium is electrolytic solution, and electrolysis obtains electrolytic silver and reclaims silver;
(2) again solution after the electrolysis of step (1) is carried out electrodeposition,, use the nitric acid dissolve liquid making, return the electrolytic process of step (1) the silver that electrodeposition obtains; The desilver electric effusion changes the indium system of putting forward over to, carries out indium cadmium separation and Extraction.
Reclaim the method for silver in a kind of alloyed scrap containing indium, cadmium of the present invention, concentration of silver ions 50～100g/l that the electrolytic solution that it is characterized in that described step (1) is, electrolytic process control cathode current density is 60～120A/m
2, electrolysing period 48h.
Reclaim the method for silver in a kind of alloyed scrap containing indium, cadmium of the present invention, it is characterized in that the electrolytic solution of the electrolytic process of described step (1) circulates with 0.6～11/h flow.
Reclaim the method for silver in a kind of alloyed scrap containing indium, cadmium of the present invention, the free acid of electrolytic deposition process control electric effusion that it is characterized in that described step (2) adopts insoluble anode at cathode current density 200～300A/m less than 2g/l
2Electrodeposition under the condition.
Method of the present invention combines electrolytic process with electrolytic deposition process, silver is separated with the indium cadmium and purify, and electrolysis obtains purity more than or equal to 99.95% electrolytic silver, adopts insoluble anode to carry out electrodeposition solution after the electrolysis again.Silver ions all discharges and separates out in groove.Taking-up electrodeposition silver, the dissolving liquid making is squeezed into header tank and is participated in circulation of elecrolyte.Obtain fine silver at electrolytic process, electrolytic deposition process thoroughly separates silver with the indium cadmium.The circulation of cell liquid is participated in electrodeposition silver dissolving liquid making.The desilver electric effusion changes the indium system over to, carries out indium cadmium separation and Extraction.Thereby realize the separation purification process of silver.Compare with the heavy silver of the molten material of traditional nitric acid, chlorination, reductive agent reduction process, simple for process, energy consumption is low, reagent dosage is few, operational condition is good and with the environment friendliness.
Description of drawings
Fig. 1 is the process flow diagram of the inventive method.
Embodiment
Reclaim the method for silver in a kind of alloyed scrap containing indium, cadmium,, be made into the electrolytic solution of concentration of silver ions 50～100g/l, the electrolyzer of packing into, header tank alloyed scrap containing indium, cadmium nitric acid dissolve liquid making.Dominant discharge 0.6～1L/h opens the valve circulation.Simultaneously silver-colored indium cadmium, silver-colored indium or silver-colored cadmium leftover bits and pieces of material are put into anode basket, control cathode current density 60～120A/m
2, energising electrolysis, electrolysing period 48h.Go out electrolytic silver, washing and drying, censorship, warehouse-in can get purity and be not less than 99.95% electrolytic silver.Flow into the electrolytic solution of intercepting basin after the electrolysis, squeeze into Winning cell, add and wash silver-colored water and transfer free acid to be not more than 2g/l, adopt insoluble anode at cathode current density 200～300A/m
2Electrodeposition under the condition, silver ions no longer discharges and separates out in groove.Shut down out electrodeposition silver, the nitric acid dissolve liquid making participates in the circulation of elecrolyte electrolysis.The desilver electric effusion changes the indium system of putting forward over to, carries out indium cadmium separation and Extraction, and silver raising recovery rate is greater than 98%.
Embodiment 1
Getting part A gInCd15-3 alloy leftover bits and pieces of material uses dilute nitric acid dissolution and electrodeposition silver solution to be made into argentiferous 50g/l electrolytic solution pack into electrolyzer, header tank.Dominant discharge 1L/h opens the valve circulation.Simultaneously the AgInCd15-3 leftover bits and pieces of material is put into the anode basket, and in electrolytic process, constantly add.Go out electrolytic silver, washing and drying, censorship, warehouse-in get purity and are not less than 99.95% electrolytic silver.The electrolyzer overflow port flows into the electrolytic solution of intercepting basin, squeezes into Winning cell, adds to wash silver-colored water and transfer free nitric acid to be not more than 2g/l, adopts insoluble anode at cathode current density 200～300A/m
2Electrodeposition under the condition, silver ions no longer discharges and separates out in groove.Shut down out electrodeposition silver, the dissolving liquid making adds the header tank circulation.Electric effusion changes the indium system of putting forward over to after the desilver, carries out indium cadmium separation and Extraction.Silver raising recovery rate is not less than 98% as stated above, and the indium cadmium enters the subsequent extracted stage in solution.
Embodiment 2
Getting part A gIn20 alloy leftover bits and pieces of material uses dilute nitric acid dissolution and electrodeposition silver solution to be made into argentiferous 100g/l electrolytic solution pack into electrolyzer, header tank.Dominant discharge 0.6L/h opens the valve circulation.Simultaneously the AgIn20 leftover bits and pieces of material is put into the anode basket, and in electrolytic process, constantly add.At cathode current density 60～120A/m
2Under the condition, electrolysing period is decided to be 48h.Go out electrolytic silver, washing and drying, censorship, warehouse-in get purity and are not less than 99.95% electrolytic silver.Through the electrolytic solution of electrolyzer overflow port inflow intercepting basin, squeeze into Winning cell, add the electrolytic silver wash water and transfer free acid less than 2g/l, adopt insoluble anode at cathode current density 250～300A/m
2Electrodeposition under the condition, silver ions no longer discharges and separates out in groove.Shut down out electrodeposition silver, the dissolving liquid making adds the header tank circulation.Electric effusion changes over to and puies forward the indium system after the desilver, extracts pure indium.The said process silver raising recovery rate is not less than 98%, and indium enters the subsequent extracted stage with the solution form.
Embodiment 3
Reclaim the method for silver in a kind of alloyed scrap containing indium, cadmium,, be made into the electrolytic solution of concentration of silver ions 80g/l, the electrolyzer of packing into, header tank alloyed scrap containing indium, cadmium nitric acid dissolve liquid making.Dominant discharge 0.8L/h opens the valve circulation.Simultaneously silver-colored indium cadmium, silver-colored indium or silver-colored cadmium leftover bits and pieces of material are put into anode basket, control cathode current density 60～80A/m
2, energising electrolysis, electrolysing period 48h.Go out electrolytic silver, washing and drying, censorship, warehouse-in can get purity and be not less than 99.95% electrolytic silver.Flow into the electrolytic solution of intercepting basin after the electrolysis, squeeze into Winning cell, add and wash silver-colored water and transfer free acid to be not more than 2g/l, adopt insoluble anode at cathode current density 200～250A/m
2Electrodeposition under the condition, silver ions no longer discharges and separates out in groove.Shut down out electrodeposition silver, the nitric acid dissolve liquid making participates in the circulation of elecrolyte electrolysis.The desilver electric effusion changes the indium system of putting forward over to, carries out indium cadmium separation and Extraction, and silver raising recovery rate is greater than 98%.
By embodiment as can be known, the separating and purifying method of silver in the silver-colored indium cadmium alloy waste material, than traditional technology, production cost, environmental protection cost decline to a great extent, and reclaim refining effect and satisfy production requirement fully.
Claims (4)
1. reclaim silver-colored method in an alloyed scrap containing indium, cadmium, it is characterized in that the step of removal process comprises:
(1) alloyed scrap containing indium, cadmium is put into the anode basket and made electrolytic anode, the solution that forms with the nitric acid dissolve alloyed scrap containing indium, cadmium is electrolytic solution, and electrolysis obtains electrolytic silver and reclaims silver;
(2) again solution after the electrolysis of step (1) is carried out electrodeposition,, use the nitric acid dissolve liquid making, return the electrolytic process of step (1) the silver that electrodeposition obtains; The desilver electric effusion changes the indium system of putting forward over to, carries out indium cadmium separation and Extraction.
2. reclaim the method for silver in a kind of alloyed scrap containing indium, cadmium according to claim 1, concentration of silver ions 50～100g/l that the electrolytic solution that it is characterized in that described step (1) is, electrolytic process control cathode current density is 60～120A/m
2, electrolysing period 48h.
3. reclaim the method for silver in a kind of alloyed scrap containing indium, cadmium according to claim 1, it is characterized in that the electrolytic solution of the electrolytic process of described step (1) circulates with 0.6～1L/h flow.
4. reclaim the method for silver in a kind of alloyed scrap containing indium, cadmium according to claim 1, it is characterized in that the free acid of the electrolytic deposition process control electric effusion of described step (2) is not more than 2g/l, adopt insoluble anode at cathode current density 200～300A/m
2Electrodeposition under the condition.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910176431A CN101671833A (en) | 2009-09-15 | 2009-09-15 | Method for recovering silver in alloyed scrap containing indium, cadmium and silver |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910176431A CN101671833A (en) | 2009-09-15 | 2009-09-15 | Method for recovering silver in alloyed scrap containing indium, cadmium and silver |
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| CN101671833A true CN101671833A (en) | 2010-03-17 |
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| CN200910176431A Pending CN101671833A (en) | 2009-09-15 | 2009-09-15 | Method for recovering silver in alloyed scrap containing indium, cadmium and silver |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101914785A (en) * | 2010-09-03 | 2010-12-15 | 西安诺博尔稀贵金属材料有限公司 | Method for recycling silver and copper from silver-copper alloy scrap |
| CN104264189A (en) * | 2014-10-16 | 2015-01-07 | 云南驰宏锌锗股份有限公司 | Method for silver refining and continuous electrolysis |
| CN104704574A (en) * | 2012-03-12 | 2015-06-10 | 阿拉法股份有限公司 | Method for recycling nuclear control rods and recycled control rod section |
| CN105525310A (en) * | 2015-11-04 | 2016-04-27 | 陕西瑞凯环保科技有限公司 | Method for recovering silver from silver-containing waste materials |
| CN109735710A (en) * | 2018-12-24 | 2019-05-10 | 励福(江门)环保科技股份有限公司 | A method of the electrolytic recovery silver from silver-plated connector waste material |
-
2009
- 2009-09-15 CN CN200910176431A patent/CN101671833A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101914785A (en) * | 2010-09-03 | 2010-12-15 | 西安诺博尔稀贵金属材料有限公司 | Method for recycling silver and copper from silver-copper alloy scrap |
| CN104704574A (en) * | 2012-03-12 | 2015-06-10 | 阿拉法股份有限公司 | Method for recycling nuclear control rods and recycled control rod section |
| KR101605804B1 (en) | 2012-03-12 | 2016-03-24 | 아레바 인코포레이티드 | Method for recycling nuclear control rods and recycled control rod section |
| CN104704574B (en) * | 2012-03-12 | 2016-11-09 | 阿拉法股份有限公司 | The control rod part of method and recovery for reclaiming nuclear control rod |
| CN104264189A (en) * | 2014-10-16 | 2015-01-07 | 云南驰宏锌锗股份有限公司 | Method for silver refining and continuous electrolysis |
| CN105525310A (en) * | 2015-11-04 | 2016-04-27 | 陕西瑞凯环保科技有限公司 | Method for recovering silver from silver-containing waste materials |
| CN109735710A (en) * | 2018-12-24 | 2019-05-10 | 励福(江门)环保科技股份有限公司 | A method of the electrolytic recovery silver from silver-plated connector waste material |
| CN109735710B (en) * | 2018-12-24 | 2020-11-10 | 励福(江门)环保科技股份有限公司 | Method for electrolyzing silver from silver-plated connector waste |
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Open date: 20100317 |