CN104264186A - Method for disposing silver electrolyzed residual electrodes - Google Patents
Method for disposing silver electrolyzed residual electrodes Download PDFInfo
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- CN104264186A CN104264186A CN201410549281.6A CN201410549281A CN104264186A CN 104264186 A CN104264186 A CN 104264186A CN 201410549281 A CN201410549281 A CN 201410549281A CN 104264186 A CN104264186 A CN 104264186A
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- 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
- C25C1/20—Electrolytic production, recovery or refining of metals by electrolysis of solutions of noble metals
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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
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention relates to a method for disposing silver electrolyzed residual electrodes. A gold-silver alloy plate carrying residual electrode is used as an anode, a titanium plate is used as a cathode, silver nitrate is used as an electrolyte for electrolysis, and electrical silver which conforms to the requirements of IC-Ag99.99 in GB/T4135-2002 is generated. Through the method that residual electrodes which are generated by the silver electrolysis and are washed and cleaned and a new anode are loaded into a bag for carrying electrolysis, the problems of high residual electrode rate, large remelting quantity, large losses, long technological process and large labor intensity in the traditional silver electrolytic process are solved. Through the application of the method disclosed by the invention, the residual electrode rate of the silver electrolysis can be reduced to 3-5% from 10-15%, so that a series of problems caused by a remelting process are solved.
Description
Technical field
The present invention relates to a kind of method of Processing Ag adopting electrolysis residual pole, belong to technical field of noble metal metallurgy.
Background technology
The electrorefining of silver extensively adopts makes anode with electrum, electrolysis in Silver Nitrate electrolytic solution.Along with the carrying out of electrolysis, anode constantly dissolves and reduces, and anodic current density increases gradually, and polarization increases, and in addition because the anode sludge constantly accumulates at anode surface, anode passivation constantly strengthens, and causes groove voltage rise high, and current efficiency declines.When general groove is pressed onto 3 ~ 3.5V, groove will be stopped, now the residual anode ratio of output all higher (10 ~ 15%).
For this part anode scrap, some producers directly enter groove electrolysis, but in groove, anode scrap can not be changed in time, cause bath voltage to raise, and electric current reduces, and is unfavorable for output increased; Electrolysis again after double teeming anode is melted down in most of producer, this treatment process inevitably increases labor capacity and labour intensity, melt down that double teeming process flow is long, energy consumption is high simultaneously, and with certain environmental protection pressure, and part silver enters flue dust, stove brick etc. and causes certain loss, the recovery of impact silver.
Summary of the invention
The object of the present invention is to provide a kind of method of Processing Ag adopting electrolysis residual pole, solve silver-colored adopting electrolysis residual pole and repeat to return the problems such as the next labour intensity of founding spindle band is large, energy consumption is high, environmental protection pressure.
Technical scheme of the present invention is: a kind of method of Processing Ag adopting electrolysis residual pole, be by the anode scrap of silver-colored electrolysis output directly and electrum plate carry and make anode, be that electrolytic solution carries out electrolysis with silver nitrate solution, on anode, there is the oxidation dissolution reaction of silver, in cathode titanium plates, there is the evolution reaction of silver.
Comprise the following steps:
(1) anode carries: first sorted by clean anode scrap, and wherein smooth bulk anode scrap is selected greatly for subsequent use because of contact area; During anode pack, one block of electrum plate carries one piece or two pieces of anode scraps (when electrum plate weight is less, two pieces of anode scraps can be mounted in electrum plate two sides respectively) load anode simultaneously, both directions are parallel, the adjacent electrum plate of the larger one side of anode scrap area, keeps good contact.
(2) electrolysis, puts into electrolyzer by the anode carried, and with titanium plate for negative electrode, energising starts electrolysis: control current density is 400 ~ 600A/m
2; Along with the carrying out of electrolysis, groove pressure raises gradually, and control flume forces down in 3.0V, namely stops electrolysis higher than this value; Control concentration of nitric acid is 6 ~ 12g/L, concentration of silver ions 80 ~ 140g/L.(3) anode scrap washing, after electrolysis terminates, take out anode scrap, cleaned up by surface anode mud, sort simultaneously, wherein smooth bulk anode scrap is selected for subsequent use, and silver-colored head and fine grained chippings return stove double teeming anode.
The invention has the beneficial effects as follows, adopt technique of the present invention, silver-colored adopting electrolysis residual pole and electrum plate are carried and make anode, return electrolysis, output silver meets IC-Ag99.99 requirement in GB/T4135-2002, silver-colored adopting electrolysis residual pole rate can be reduced to 3 ~ 5% simultaneously, greatly reduce and melt down double teeming amount of metal, reduce energy consumption, alleviate labour intensity, decreasing environmental protection pressure, decreasing the silver loss produced because melting down double teeming.
Embodiment
Below in conjunction with embodiment, the invention will be further described, and following instance is intended to the present invention instead of the further restriction to invention are described.
Embodiment 1
Sorted by clean anode scrap, wherein smooth bulk anode scrap is selected greatly for subsequent use because of contact area; During anode pack, one block of electrum plate carries one piece of anode scrap (when electrum plate weight is less, also two pieces of anode scraps can be mounted in electrum plate two sides respectively) load anode simultaneously, both directions are parallel, the adjacent electrum plate of the larger one side of anode scrap area, keeps good contact.The anode carried is put into electrolyzer, and with titanium plate for negative electrode, energising starts electrolysis.Controlling cathode current density during fluting is 400A/m
2progressively be increased to 600A/m subsequently
2, slowly reduce to 400A/m again close to when stopping groove
2; Along with the carrying out of electrolysis, groove pressure raises gradually, and control flume forces down in 3.0V, namely stops electrolysis higher than this value; Control concentration of nitric acid is 7 ~ 9g/L, concentration of silver ions 80 ~ 90g/L.Silver-colored adopting electrolysis residual pole rate is 3.7% with this understanding, and the silver powder of output and silver ingot quality, in table 1, meet IC-Ag99.99 requirement in GB/T4135-2002.
Table 1 carries electrolysis output silver powder and silver ingot composition
Embodiment 2
Sorted by clean anode scrap, wherein smooth bulk anode scrap is selected greatly for subsequent use because of contact area; During anode pack, one block of electrum plate carries one piece of anode scrap (when electrum plate weight is less, also two pieces of anode scraps can be mounted in electrum plate two sides respectively) load anode simultaneously, both directions are parallel, the adjacent electrum plate of the larger one side of anode scrap area, keeps good contact.The anode carried is put into electrolyzer, and with titanium plate for negative electrode, energising starts electrolysis.Controlling cathode current density during fluting is 400A/m
2progressively be increased to 600A/m subsequently
2, slowly reduce to 400A/m again close to when stopping groove
2; Along with the carrying out of electrolysis, groove pressure raises gradually, and control flume forces down in 3.0V, namely stops electrolysis higher than this value; Control concentration of nitric acid is 10 ~ 11g/L, concentration of silver ions 100 ~ 110g/L.Silver-colored adopting electrolysis residual pole rate is 4.0% with this understanding, and the silver powder of output and silver ingot quality, in table 2, meet IC-Ag99.99 requirement in GB/T4135-2002.
Table 2 carries electrolysis output silver powder and silver ingot composition
Claims (5)
1. the method for a Processing Ag adopting electrolysis residual pole, be by the anode scrap of silver-colored electrolysis output directly and electrum plate carry and make anode, be that electrolytic solution carries out electrolysis with silver nitrate solution, it is characterized in that: comprise the following steps: (1) anode carries, during anode pack, one block of electrum plate carries one piece or two pieces of anode scraps load anode simultaneously; (2) electrolysis, puts into electrolyzer by the anode carried, and with titanium plate for negative electrode, energising starts electrolysis: control current density is 400 ~ 600A/m
2, groove forces down in 3.0V; (3) anode scrap washing, after electrolysis terminates, take out anode scrap, cleaned up by surface anode mud, wherein smooth bulk anode scrap is selected for subsequent use.
2. the method for a kind of Processing Ag adopting electrolysis residual pole according to claim 1, it is characterized in that: during the anode pack that anode carries, one block of electrum plate carries one piece of anode scrap, and both directions are parallel, the adjacent electrum plate of the larger one side of anode scrap area, keeps good contact.
3. the method for a kind of Processing Ag adopting electrolysis residual pole according to claim 1, is characterized in that: the concentration of nitric acid of described electrolytic solution is 6 ~ 12g/L.
4. the method for a kind of Processing Ag adopting electrolysis residual pole according to claim 1, is characterized in that: the concentration of silver ions 80 ~ 140g/L of described electrolytic solution.
5. the method for a kind of Processing Ag adopting electrolysis residual pole according to claim 1-4, is characterized in that: silver-colored adopting electrolysis residual pole rate is reduced to 3 ~ 5% by 10 ~ 15%.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410549281.6A CN104264186B (en) | 2014-10-16 | 2014-10-16 | A kind of method of Processing Ag adopting electrolysis residual pole |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410549281.6A CN104264186B (en) | 2014-10-16 | 2014-10-16 | A kind of method of Processing Ag adopting electrolysis residual pole |
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| Publication Number | Publication Date |
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| CN104264186A true CN104264186A (en) | 2015-01-07 |
| CN104264186B CN104264186B (en) | 2016-08-31 |
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| CN201410549281.6A Active CN104264186B (en) | 2014-10-16 | 2014-10-16 | A kind of method of Processing Ag adopting electrolysis residual pole |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108130559A (en) * | 2017-12-25 | 2018-06-08 | 中矿金业股份有限公司 | The electrolytic method of non-residual electrode electrolysis |
| CN110684992A (en) * | 2019-11-13 | 2020-01-14 | 安阳市岷山有色金属有限责任公司 | Noble metal smelting non-residual anode electrolysis process |
| CN112941564A (en) * | 2021-01-29 | 2021-06-11 | 东营海特金属材料有限公司 | Method for treating high-purity copper electrolysis residual anode plate |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2331679Y (en) * | 1998-06-30 | 1999-08-04 | 沈阳冶炼厂 | Titanium basket for putting alloy positive plate |
| CN1974860B (en) * | 2006-11-10 | 2010-10-13 | 湖南鑫达银业股份有限公司 | High purity silver preparing electrolysis process |
-
2014
- 2014-10-16 CN CN201410549281.6A patent/CN104264186B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2331679Y (en) * | 1998-06-30 | 1999-08-04 | 沈阳冶炼厂 | Titanium basket for putting alloy positive plate |
| CN1974860B (en) * | 2006-11-10 | 2010-10-13 | 湖南鑫达银业股份有限公司 | High purity silver preparing electrolysis process |
Non-Patent Citations (2)
| Title |
|---|
| HIROSHI IMAZAWA: "银的连续电解精炼", 《有色冶炼》, 31 March 1985 (1985-03-31) * |
| 沙涛等: "金银合金无残极电解新工艺", 《贵金属》, no. 4, 30 August 2005 (2005-08-30), pages 42 - 43 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108130559A (en) * | 2017-12-25 | 2018-06-08 | 中矿金业股份有限公司 | The electrolytic method of non-residual electrode electrolysis |
| CN110684992A (en) * | 2019-11-13 | 2020-01-14 | 安阳市岷山有色金属有限责任公司 | Noble metal smelting non-residual anode electrolysis process |
| CN112941564A (en) * | 2021-01-29 | 2021-06-11 | 东营海特金属材料有限公司 | Method for treating high-purity copper electrolysis residual anode plate |
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| CN104264186B (en) | 2016-08-31 |
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