CN1017167B - Direct electrolytic refining of copper scrap by stainless steel anode frame - Google Patents
Direct electrolytic refining of copper scrap by stainless steel anode frameInfo
- Publication number
- CN1017167B CN1017167B CN89105878A CN89105878A CN1017167B CN 1017167 B CN1017167 B CN 1017167B CN 89105878 A CN89105878 A CN 89105878A CN 89105878 A CN89105878 A CN 89105878A CN 1017167 B CN1017167 B CN 1017167B
- Authority
- CN
- China
- Prior art keywords
- electrolysis
- anode frame
- stainless steel
- composition
- copper
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- 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
Landscapes
- Electrolytic Production Of Metals (AREA)
Abstract
The present invention relates to a technological method of direct electrolysis refining of copper scrap. A stainless steel material serves as an anode frame, and copper scrap is put in the anode frame for direct electrolysis. A charging method and a control electrolysis parameter are selected, so the stainless steel anode frame is not corroded by electrochemistry. The copper scrap with the copper content more than 60% can be obtained by direct electrolysis refining by adopting the method, and the quality of the produced electrolysis copper conforms to the GB. 466.64 standard. The primary recovery of copper is more than 95%, the average current efficiency of the anode is about 99%, and the average current efficiency of the cathode is about 97%. Compared with a pyrogenic process and under the condition of the same current efficiency, the comprehensive energy consumption is reduced by about 30%, and copper is not burnt in a smelting working procedure or a casting working procedure.
Description
The present invention relates to the processing method of direct electrolytic refining of copper scrap.
Usually, when adopting reclaimed copper (waste and old composition brass) to produce electrolytic copper, all adopt pyrogenic process, its technical process is: blast furnace smelting-reverberatory refining-casting positive plate-electrorefining-finished product electrolytic copper.This method technical process is long, and the rate of recovery is low, and investment is big, and its major technique, economic key are the smelting and the casting of positive plate.Just produced thus, the processing method of the direct electrorefining of frame anode.This method employing anode frame is directly packed composition brass into and is carried out electrorefining, thereby has replaced operations such as the melting of positive plate, casting.Yet the material of anode frame must possess can resistance to chemical attack, again can electrochemical corrosion resistant, certain mechanical strength and rigidity are arranged, and good conductivity, performances such as handling ease.The anode frame material that adopts mainly contains titanium, aluminium, plastics etc. at present.But all because of price is too high, processing difficulties, bad mechanical strength.Poorly conductives etc. are former thereby fail to be used industrial.
The present invention proposes a kind of processing method that adopts stainless steel anode frame to carry out direct electrolytic refining of copper scrap, both when composition brass directly frames up electrolysis, adopts stainless material to do anode frame.Usually, the resistance to chemical corrosion of stainless material is better, and the electrochemical corrosion resistant poor-performing can not be used as the anode frame material.Yet, when adopting stainless steel to do anode frame, the composition brass amount of being adorned in the frame is exceeded more than the electrolysis liquid surface 5cm, it is good to guarantee that composition brass and stainless steel anode frame just contact in the anode upper end, and attention is sturdy with the composition brass dress, and composition brass is closely contacted with the internal surface of stainless steel anode frame, make stainless steel anode frame and composition brass form compound (in parallel) positive plate, because the electric conductivity of copper is than stainless steel height, anodic current mainly concentrates on the composition brass, has avoided the galvanic corrosion of stainless steel anode frame.Anode, cloudy interpolar distribution of current when improving electrolysis, the porosity of stainless steel anode frame is 20-35%, is advisable with 30%, and in the anode frame outside, loads onto a woven dacron cover that geomery is identical with anode frame.During electrorefining, the control bath voltage is 0.2-0.9V, is advisable with 0.7V, and current density is 150-225A/m
2, with 200A/m
2Be advisable.The electrolytic solution composition is: Cu40-55g/l, be advisable H with 45g/l
2SO
4120-200g/l is advisable with 150g/l.
Adopt direct electrolytic refining of copper scrap of the present invention, but the electrorefining copper content is at the composition brass more than 60%, the electrolytic copper quality of producing thus meets the GB-466-64 standard, the primary recovery of copper is more than 95%, anodic mean current efficient is about 99%, and negative electrode mean current efficient is about 97%.When current efficiency is identical, compare comprehensive energy consumption low about 30% with pyrogenic process.No melting, the scaling loss of copper in the casting process.
The present invention is described further with an example below.
Do anode frame with the thick homemade stainless steel of 2mm (trade mark is 1Cr18Ni9Ti) sheet material, the waste and old composition brass of dress 200kg is as anode in the frame, and composition brass exceeds electrolysis liquid surface 5cm.The composition of its composition brass is Cu 〉=90%, Zn surplus.The stainless steel anode frame porosity is 30%, overcoat woven dacron cover, and cathode sheets is identical with common process.Electrolytic solution composition: Cu45-55g/l, H
2SO
4120-150g/l, Zn23-32g/l, electrolysis temperature 50-55 ℃, bath voltage 0.7-0.8V, current density (negative electrode calculating) 150-225A/m
2The copper factor of its gained electrolytic copper is 99.952-99.96%, meets the first grade of GB-466-64 standard.Direct recovery rate of metallic copper is 95-97.99%, average anode current efficient 99.61%, average cathode efficiency 97.64%.Through check, the stainless steel anode frame smooth surface is smooth, no galvanic corrosion phenomenon, and metallographic detects, first intergranular corrosion phenomenon.
Claims (7)
1, a kind of processing method of direct electrorefining composition brass, adopt the direct electrolysis of anode frame, it is characterized in that: adopt stainless material to do anode frame, its porosity is 20～35% to be set with a woven dacron cover that geomery is identical with anode frame outside anode frame, and is with stainless steel anode frame dress composition brass the time, should be with the composition brass dress sturdy and exceed electrolysis liquid surface 5cm, composition brass is closely contacted with the stainless steel anode frame internal surface, the control bath voltage, current density and electrolytic solution composition, directly electrolysis composition brass.
2, the processing method of electrolysis composition brass as claimed in claim 1 is characterized in that: the porosity of stainless steel anode frame is 30%.
3, the processing method of electrolysis composition brass as claimed in claim 1 is characterized in that: it is the stainless steel plate of 1Cr18Ni9Ti that the stainless steel anode frame material adopts the trade mark.
4, the processing method of electrolysis composition brass according to claim 1, it is characterized in that: should control bath voltage during electrolysis is 0.2-0.9V, and current density is 150-225A/m
2
5, as the processing method of claim 1,4 described electrolysis composition brasses, it is characterized in that: the control bath voltage is 0.7V during electrolysis, and control current density is 200A/m
2
6, electrolysis is mixed and is made processing method according to claim 1, and it is characterized in that: the electrolytic solution composition is Cu40-55g/l, H
2SO
4120-200g/l.
7, as the processing method of claim 1,6 described electrolysis composition brasses, it is characterized in that: bath composition is Cu45g/l, H
2SO
4Be 150g/l.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN89105878A CN1017167B (en) | 1989-03-20 | 1989-03-20 | Direct electrolytic refining of copper scrap by stainless steel anode frame |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN89105878A CN1017167B (en) | 1989-03-20 | 1989-03-20 | Direct electrolytic refining of copper scrap by stainless steel anode frame |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1036805A CN1036805A (en) | 1989-11-01 |
| CN1017167B true CN1017167B (en) | 1992-06-24 |
Family
ID=4856512
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN89105878A Expired CN1017167B (en) | 1989-03-20 | 1989-03-20 | Direct electrolytic refining of copper scrap by stainless steel anode frame |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1017167B (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1034957C (en) * | 1993-04-24 | 1997-05-21 | 王绍和 | Method for preparing electrolytic copper by direct electrolysis of copper sulfide ore and electrolytic bath thereof |
| JP4298712B2 (en) * | 2006-03-01 | 2009-07-22 | 日鉱金属株式会社 | Method for electrolytic purification of copper |
| CN101392388B (en) * | 2008-10-21 | 2011-09-14 | 四会市鸿明贵金属有限公司 | Electrolysis method of polymetallic blister copper |
| US8840773B2 (en) | 2011-06-17 | 2014-09-23 | Empire Technology Development LLP | Reclaiming metal from articles |
| CN102268692B (en) * | 2011-06-21 | 2014-06-11 | 白银启源工贸有限公司 | Method for producing cathode copper by directly electrolyzing spongy copper |
| CN103374732A (en) * | 2012-04-11 | 2013-10-30 | 王惟华 | Anode scrap-free tandem electrolyzing device with anode material storing box |
| CN102776527B (en) * | 2012-07-31 | 2015-10-07 | 界首市格林铜业有限公司 | Utilize cupric waste wet underwater welding higher-grade copper coin clean energy-saving environmental-protecting process |
| CN103540956A (en) * | 2013-09-26 | 2014-01-29 | 界首市飞航铜业有限公司 | Wet separation technology for waste copper-tin alloy fitting soldering flakes |
| CN103510109B (en) * | 2013-10-24 | 2016-03-02 | 北京化工大学 | The method of the leaded grid of waste lead acid battery is reclaimed from gravity contact electricity solution |
| CN105018963B (en) * | 2014-04-21 | 2017-12-05 | 上海奇谋能源技术开发有限公司 | A kind of method of Direct Electrolysis refined metals particle |
| CN105714329B (en) * | 2014-12-05 | 2017-10-20 | 上海奇谋能源技术开发有限公司 | A kind of method of Direct Electrolysis scrap |
| CN105821443A (en) * | 2016-05-10 | 2016-08-03 | 胡桂生 | Production process of cathode copper |
-
1989
- 1989-03-20 CN CN89105878A patent/CN1017167B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN1036805A (en) | 1989-11-01 |
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| C13 | Decision | ||
| GR02 | Examined patent application | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |