CN101353727A - Method for reclaiming silver and copper in silver-copper alloy scrap - Google Patents
Method for reclaiming silver and copper in silver-copper alloy scrap Download PDFInfo
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- CN101353727A CN101353727A CNA2008102223850A CN200810222385A CN101353727A CN 101353727 A CN101353727 A CN 101353727A CN A2008102223850 A CNA2008102223850 A CN A2008102223850A CN 200810222385 A CN200810222385 A CN 200810222385A CN 101353727 A CN101353727 A CN 101353727A
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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- Y02P10/20—Recycling
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Abstract
The invention provides a method for recycling silver and copper in silver and copper alloy scrap, relating to a method for the wet recycling of the silver and copper in the silver and copper alloy scrap. The method is characterized in that the recycling process comprises the steps that the silver and copper alloy is firstly dissolved by using nitric acid, the solution is heated, evaporated and condensed to obtain silver nitrate and copper nitrate crystal; heating is continued to obtain a copper oxide mixture with decomposed silver nitrate and copper nitrate, water is slowly added into the mixture to cause the silver nitrate in the mixture to be dissolved, solid copper oxide and silver nitrate solution are separated out by filtration, and finally, a silver nitrate solution electro-deposition tank is added to directly carry out electro-deposition to prepare electro-deposited silver. Compared with the traditional method, the method of the invention eliminates the processes of chloridized silver deposition and copper separation, and hydrazine hydrate reduction silver-preparation, thus effectively reducing the reagent consumption and the silver-recycling cost. Acid-containing solution generated in the electro-deposition process can be circularly used for silver and copper alloy dissolving without emission. The method of the invention can separate and recycle silver and copper, with high efficiency, low cost and simplicity, and has high electro-deposited silver quality.
Description
Technical field
Reclaim the method for silver-bearing copper in the yellow gold waste material, relate to a kind of hydrometallurgic recovery silver of yellow gold waste material, the method for copper.
Background technology
The electroconductibility of silver and thermal conductivity all for the highest, are mainly used in industry, ornaments, standard national currency, aspect such as medical in metal.Its industrial consumption accounts for 86%, and electric contact and scolder consumption account for wherein 25%, and silver-copper is its major ingredient.Yellow gold waste material in the production process is essential to be reclaimed.
Hydrometallurgic recovery technology commonly used is the nitric acid dissolve alloy, and silver-colored separating copper is sunk in chlorination, hydrazine hydrate reduction system sponge silver.This technology is longer, consumes reagent such as hydrochloric acid, ammoniacal liquor, hydrazine hydrate, and cost height, quality of cathode silver are 99.95%, and silver raising recovery rate is low, and copper does not reclaim.Select simple high efficiente callback silver, the method for copper is the emphasis of silver recovery.
Summary of the invention
Purpose of the present invention is exactly the deficiency that exists at above-mentioned prior art, provide the silver amount height of a kind of recovery, reagent consumption less, rate of recovery height, and can reclaim the method for silver-bearing copper in the recovery yellow gold waste material of copper.
The objective of the invention is to be achieved through the following technical solutions.
A kind of method that reclaims silver-bearing copper in the yellow gold waste material, it is characterized in that its removal process at first with the yellow gold nitric acid dissolve, again the solution heating evaporation is concentrated, obtain Silver Nitrate, cupric nitrate crystallization; Continue heating again and obtain the copper oxide mixture that Silver Nitrate and cupric nitrate resolve into, in mixture, slowly add water again and make Silver Nitrate dissolving in the mixture, filter to isolate solid oxidation copper and silver nitrate solution, at last silver nitrate solution is added galvanic deposition cell, carry out galvanic deposit and make electrodeposition silver.
This method can be used for argentiferous and reclaims silver, copper greater than 70% silver alloys.Mainly contain AgCu0.6, AgCu2, AgCu4, AgCu10, AgCu20, AgCu28, AgCuV10-0.15, AgCuV10-0.2, Ag-12Cd0, Ag-12Cd03, to argentiferous less than 70% alloy, can allocate silver or high yellow gold into, reclaim silver-bearing copper with this method.Mainly contain AgCu70, AgCuSn27-5, AgCuSn27-7, AgCuZn20-10, AgCuZn45-30.This method can be used for from silver-bearing copper greater than reclaiming silver, copper 90% the alloy.
A kind of method that reclaims silver-bearing copper in the yellow gold waste material of the present invention is effectively utilized the characteristic of cupric nitrate thermal degradation cupric oxide, realizes that silver-bearing copper separates and reclaims copper fully; Utilize electrodip process to reclaim silver, saved precipitated silver, operations such as hydrazine hydrate reduction directly obtain electrodeposition silver.Reduce reagent consumption, effectively reduced the silver recovery cost.The acid-containing solution that produces in the electrodeposition process, the yellow gold that is used for capable of circulation dissolves, and does not have discharging.Method of the present invention can be effective, and low cost is simply separated silver-bearing copper and recovery.The silver amount height of electrodeposition.
Embodiment
A kind of method that reclaims silver-bearing copper in the yellow gold waste material, its removal process, concentrate the solution heating evaporation the yellow gold nitric acid dissolve at first again, obtain Silver Nitrate, cupric nitrate crystallization; Continue the copper oxide mixture that heating obtains Silver Nitrate and cupric nitrate decomposition again, in mixture, slowly add water again and make Silver Nitrate dissolving in the mixture, filter to isolate solid oxidation copper and silver nitrate solution, at last silver nitrate solution is added galvanic deposition cell, carry out galvanic deposit and make electrodeposition silver.
During operation, yellow gold is placed the titanium bucket, add 6L nitric acid (65%) dissolving, treat that solid dissolves post-heating fully to Silver Nitrate and cupric nitrate crystallization by the 4Kg alloy.Continue to be heated to 177 ℃, cupric nitrate begins to decompose, and NO is arranged
2Emit about 200 ℃ of service temperature.No NO
2After the effusion, slowly add deionized water, Silver Nitrate is dissolved fully.Filtering separation silver-bearing copper, filter cake are cupric oxide, and filtrate is silver nitrate solution.Solution added carry out galvanic deposit, concentration of silver ions 100-200g/L, current density: 400A/m in the Winning cell
2, bath voltage: 2-3V, electrodeposition cycle 24hr.Electrodeposition silver is silvery white, and the oven dry of washing back, electric effusion heating are anhydrated and be used for the alloy dissolving.The air-dry back of cupric oxide packing.
Implementation column 1
The AgCu10 alloy is placed the titanium bucket, add 6L nitric acid (65%) dissolving, treat that solid dissolves post-heating fully to Silver Nitrate and cupric nitrate crystallization by the 4Kg alloy.Continue to be heated to 177 ℃, cupric nitrate begins to decompose, and NO is arranged
2Emit about 200 ℃ of service temperature.No NO
2After the effusion, slowly add deionized water, Silver Nitrate is dissolved fully.Filtering separation silver-bearing copper, filter cake are cupric oxide, and filtrate is silver nitrate solution.Solution added carry out galvanic deposit, concentration of silver ions 100-200g/L, current density: 400A/m in the Winning cell
2, bath voltage: 2-3V, electrodeposition cycle 24hr.Electrodeposition silver is silvery white, and the oven dry of washing back, electric effusion heating are anhydrated and be used for the alloy dissolving.The air-dry back of cupric oxide packing.Silver raising recovery rate 99.0%%, copper recovery 99%%.
Implementation column 2
With the AgCu20 alloy, 4Kg places the titanium bucket, adds water 2L, adds the nitric acid dissolve alloy in batches, treats that solid dissolves complete post-heating, and in the time of 177 ℃, cupric nitrate begins to decompose, and NO is arranged
2Gas evolution, NO not had
2During gas evolution, stop heating, slowly add entry to Silver Nitrate and dissolve fully.Filter after cooling, cupric oxide does not wash on funnel to there being the silver back and concentrates, and silver nitrate solution advances galvanic deposition cell, and electrodeposition silver sinks to bottom land regularly to be pulled out, and the oven dry of washing back is used for the alloy dissolving after the electric effusion evaporation.Silver raising recovery rate 99.6%, copper recovery 99.9%.
Implementation column 3
With the AgCu28 alloy, 4Kg places the titanium bucket, adds water 2L, adds the nitric acid dissolve alloy in batches, treats that solid dissolves complete post-heating, and in the time of 177 ℃, cupric nitrate begins to decompose, and NO is arranged
2Gas evolution, NO not had
2During gas evolution, stop heating, slowly add entry to Silver Nitrate and dissolve fully.Filter after cooling, cupric oxide does not wash on funnel to there being the silver back and concentrates, and silver nitrate solution advances galvanic deposition cell, and electrodeposition silver sinks to bottom land regularly to be pulled out, and the oven dry of washing back is used for the alloy dissolving after the electric effusion evaporation.Silver raising recovery rate 99.0%～99.6%, copper recovery 99%～100%.
Implementation column 4
With the AgCuV10-0.2 alloy, 4Kg places the titanium bucket, places the titanium bucket, adds water 2L, adds the nitric acid dissolve alloy in batches, treats that solid dissolves complete post-heating, and in the time of 177 ℃, cupric nitrate begins to decompose, and NO is arranged
2Gas evolution, NO not had
2During gas evolution, stop heating, slowly add entry to Silver Nitrate and dissolve fully.Filter after cooling, cupric oxide does not wash on funnel to there being the silver back and concentrates, and silver nitrate solution advances galvanic deposition cell, and electrodeposition silver sinks to bottom land regularly to be pulled out, and the oven dry of washing back is used for the alloy dissolving after the electric effusion evaporation.Silver raising recovery rate 99.0%, copper recovery 99.8%.
Implementation column 5
With the AgCu70 alloy, 2kg and AgCu10 alloy, 3kg places the titanium bucket, adds water 2L, adds the nitric acid dissolve alloy in batches, treats that solid dissolves complete post-heating, and in the time of 177 ℃, cupric nitrate begins to decompose, and NO is arranged
2Gas evolution, NO not had
2During gas evolution, stop heating, slowly add entry to Silver Nitrate and dissolve fully.Filter after cooling, cupric oxide does not wash on funnel to there being the silver back and concentrates, and silver nitrate solution advances galvanic deposition cell, and electrodeposition silver sinks to bottom land regularly to be pulled out, and the oven dry of washing back is used for the alloy dissolving after the electric effusion evaporation.Silver raising recovery rate 99.6%, copper recovery 99%%.
Claims (1)
1. method that reclaims silver-bearing copper in the yellow gold waste material, it is characterized in that its removal process at first with the yellow gold nitric acid dissolve, again the solution heating evaporation is concentrated, obtain Silver Nitrate, cupric nitrate crystallization; Continue again that heating obtains Silver Nitrate and cupric nitrate resolves into copper oxide mixture, in mixture, slowly add water again and make Silver Nitrate dissolving in the mixture, filter to isolate solid oxidation copper and silver nitrate solution, at last silver nitrate solution is added galvanic deposition cell, carry out galvanic deposit and make electrodeposition silver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102223850A CN101353727A (en) | 2008-09-18 | 2008-09-18 | Method for reclaiming silver and copper in silver-copper alloy scrap |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102223850A CN101353727A (en) | 2008-09-18 | 2008-09-18 | Method for reclaiming silver and copper in silver-copper alloy scrap |
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| CN101353727A true CN101353727A (en) | 2009-01-28 |
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| CNA2008102223850A Pending CN101353727A (en) | 2008-09-18 | 2008-09-18 | Method for reclaiming silver and copper in silver-copper alloy scrap |
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Cited By (9)
| 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 |
| CN101914681A (en) * | 2010-07-27 | 2010-12-15 | 乐清市瑞集环保科技有限公司 | Pollution-free method for treating copper, lead and silver-containing material |
| CN102730891A (en) * | 2012-08-02 | 2012-10-17 | 华夏新资源有限公司 | System for cyclically utilizing nitric acid in wet process of surface treatment |
| CN102730892A (en) * | 2012-08-02 | 2012-10-17 | 华夏新资源有限公司 | Method for cyclically utilizing nitric acid in wet process of surface treatment |
| CN106517116A (en) * | 2016-11-27 | 2017-03-22 | 方亚飞 | Industrial waste nitric acid comprehensive utilization process |
| CN108149018A (en) * | 2017-12-31 | 2018-06-12 | 西北有色金属研究院 | The recovery method of Ag in a kind of Bi systems superconducting line strips |
| CN108330284A (en) * | 2018-01-24 | 2018-07-27 | 黄冈师范学院 | The method that metallic copper is recycled from copper-iron alloy |
| CN112939057A (en) * | 2021-03-26 | 2021-06-11 | 重庆烯宇新材料科技有限公司 | Method for recycling nano silver wire waste |
| CN115595443A (en) * | 2022-09-30 | 2023-01-13 | 亚洲硅业（青海）股份有限公司（Cn） | Recycling method for bell jar coating of reduction furnace, auxiliary device for recycling, and solution circulation system for recycling |
-
2008
- 2008-09-18 CN CNA2008102223850A patent/CN101353727A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101914681A (en) * | 2010-07-27 | 2010-12-15 | 乐清市瑞集环保科技有限公司 | Pollution-free method for treating copper, lead and silver-containing material |
| 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 |
| CN102730891A (en) * | 2012-08-02 | 2012-10-17 | 华夏新资源有限公司 | System for cyclically utilizing nitric acid in wet process of surface treatment |
| CN102730892A (en) * | 2012-08-02 | 2012-10-17 | 华夏新资源有限公司 | Method for cyclically utilizing nitric acid in wet process of surface treatment |
| CN106517116A (en) * | 2016-11-27 | 2017-03-22 | 方亚飞 | Industrial waste nitric acid comprehensive utilization process |
| CN108149018A (en) * | 2017-12-31 | 2018-06-12 | 西北有色金属研究院 | The recovery method of Ag in a kind of Bi systems superconducting line strips |
| CN108330284A (en) * | 2018-01-24 | 2018-07-27 | 黄冈师范学院 | The method that metallic copper is recycled from copper-iron alloy |
| CN108330284B (en) * | 2018-01-24 | 2019-09-17 | 黄冈师范学院 | The method of metallic copper is recycled from copper-iron alloy |
| CN112939057A (en) * | 2021-03-26 | 2021-06-11 | 重庆烯宇新材料科技有限公司 | Method for recycling nano silver wire waste |
| CN115595443A (en) * | 2022-09-30 | 2023-01-13 | 亚洲硅业（青海）股份有限公司（Cn） | Recycling method for bell jar coating of reduction furnace, auxiliary device for recycling, and solution circulation system for recycling |
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Open date: 20090128 |