CN104047022A - Electrolyzing and recovering method for copper in waste diamond cutter - Google Patents
Electrolyzing and recovering method for copper in waste diamond cutter Download PDFInfo
- Publication number
- CN104047022A CN104047022A CN201410249879.3A CN201410249879A CN104047022A CN 104047022 A CN104047022 A CN 104047022A CN 201410249879 A CN201410249879 A CN 201410249879A CN 104047022 A CN104047022 A CN 104047022A
- Authority
- CN
- China
- Prior art keywords
- copper
- diamond cutter
- sulfuric acid
- waste diamond
- waste
- 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.)
- Pending
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
Abstract
The invention discloses an electrolyzing and recovering method for copper in a waste diamond cutter. The electrolyzing and recovering method is characterized by comprising the following steps: placing the waste diamond cutter into a sulfuric acid and thiourea mixed solution to remove oil and rust, and washing with distilled water after taking out the waste diamond cutter; placing the oil and rust removed waste diamond cutter into a meshy titanium conducting frame so as to be used as an anode, and taking a titanium plate as a cathode; taking a sulfuric acid solution containing 0.50-5.00mol/L of sulfuric acid or copper sulfate containing 0.05-0.40mol/L of copper and a mixed solution containing 0.50-5.00mol/L of sulfuric acid as an electrolyte, or adding a 0.10-0.40mol/L sodium chloride solution into the electrolyte; electrolyzing at the current density of 300-600A/m<2> and the cell voltage of 1.0-2.0V for 24 hours, then, scrapping copper powder, and carrying out vacuum drying after treating by using a benzotriazole ethanol solution. The method disclosed by the invention is used for efficiently dissolving the waste diamond cutter, greenly separating copper and providing conditions for enriching and recovering silver.
Description
Technical field
The present invention relates to a kind of recovery method of copper, be specifically related to a kind of from waste diamond cutter the electrolytic recovery method of copper.
Background technology
Diamond cutter have high hardness, wear resistance, low-friction coefficient, high elastic coefficient and high thermal conductance low thermal coefficient of expansion, with the feature such as non-ferrous metal avidity is little, be a kind of superior parting tool, be widely used in the industries such as Rock cutting, oil drilling and precision optical machinery processing.Diamond cutter is conventionally taking man-made diamond as cutting material, wolfram varbide is the carcass material of instrument, taking copper powder, cobalt powder and nickel powder etc. as binding agent, process through hot press forming technology, conventionally formed by 1% ~ 2% man-made diamond, 4% ~ 7% wolfram varbide, 30% ~ 50% iron, 20% ~ 30% bronze medal, 5% ~ 10% nickel, 5% ~ 10% tin, 0.2% ~ 1.0% silver medal.10% ~ 15% diamond cutter, using later stage abandoned, causes the waste of resource.
Wang Limin etc. ((theory and the experimental study of waste and old diamond tool acid recovery valuable metal), " rare metal ", Vol.34, No.6, P919-923,2010) and ((the depositing technology research of ultra-fine prealloy powder is produced in the regeneration of discarded metal base diamond goods), " powder metallurgy industry ", Vol.21, No.4, P919-923,2011) propose taking hydrochloric acid: nitric acid=3: 2 nitration mixture that form are as leaching medium, in 96 DEG C of waters bath with thermostatic control, leach 80 minutes, the valuable metal leaching yields such as copper, nickel, iron, cobalt, tin reach 99% left and right.This acidolysis process valuable metal leaching yield is higher, but the use of nitric acid brings certain influence for later separation reclaims valuable metal, containing the waste water of nitrate radical and the secondary pollution that may produce the gas such as nitrogen protoxide, nitrogen peroxide, nitric acid price is high simultaneously, and cost recovery is increased.
The little clear grade of Zheng ((the comprehensive recovery of the valuable material such as diamond in useless cutter), " Jiangxi chemical industry ", No.4,2008, P197-199) proposes taking Potcrate-hydrochloric acid as solvent, oxidation stripping 100h, and waste and old cutter dissolution rate reaches more than 99%.After stripping, add floatation agent OR, heating or drum air separation diamond and wolfram varbide, reclaim copper, iron with copper sponge, ferric sulfate or ferric sulfate, copper sulfate form.This technique has been avoided the use of nitric acid, does not produce toxic gas.But this technological reaction time is long, reaction efficiency is on the low side, is difficult to realize industrial application.
CN201210137164.X discloses a kind of method that adopts sodium chlorate and the waste and old diamond tool of dissolving with hydrochloric acid under air-proof condition.The comprehensive recovery of diamond, wolfram varbide is greater than 99%, and the comprehensive recovery of other valuable materials is greater than 98%.Although the method valuable component rate of recovery is high, the use of sodium chlorate may produce the obnoxious flavoures such as dioxide peroxide, harmful.
Summary of the invention
In order to overcome the shortcoming of prior art, realize in efficient, the waste and old diamond cutter of green separation the valuable components such as copper, diamond, wolfram varbide, the invention provides a kind of technical process short, economical and practical, operating environment close friend, the high methods of the rate of recovery such as copper, diamond, wolfram varbide.
The method steps of the valuable components such as waste diamond cutter Direct Electrolysis recovery copper of the present invention is as follows:
It is 95: 2 ~ 5 5% ~ 10% sulfuric acid in mass ratio that waste diamond cutter is placed in: thiocarbamide mixed solution, stir 10 ~ 20 minutes degreasing and rust removals, take out after waste diamond cutter, with distilled water wash for several times; Waste diamond cutter after degreasing and rust removal is packed in netted titanium conductive pane as anode, taking titanium plate as negative electrode; Content be the sulphuric acid soln of 0.50 ~ 5.00mol/L or copper sulfate that copper content is 0.05 ~ 0.40mol/L and the sulfuric acid content mixing solutions that is 0.50 ~ 5.00mol/L as electrolytic solution, or in described electrolytic solution, add the sodium chloride solution of 0.10 ~ 0.40mol/L; Current density is 300 ~ 600A/m
2, bath voltage is 1.0 ~ 2.0V, after electrolysis 24h, and scraping copper powder, after processing with benzotriazole ethanolic soln, vacuum-drying.
In electrolytic process, copper, nickel, iron, tin etc. enter electrolytic solution, and diamond, wolfram varbide and silver enter the anode sludge with insolubles form.
The present invention adopts electrolytic oxidation reduction to reclaim the method for the copper in waste diamond cutter, taking in the sulfuric acid, lower concentration copper of low acidity as electrolytic solution, without adding the oxygenants such as nitric acid, chloroazotic acid, hydrogen peroxide, clorox, sodium chlorate.Method of the present invention has realized the high-efficiency dissolution, green separation copper of waste diamond cutter and provides condition for silver-colored enriching and recovering.
Embodiment
Embodiment 1
Take waste diamond cutter 600g, being placed in by 5% sulfuric acid and thiocarbamide is the mixing solutions of 95: 2 in mass ratio, stirs 20 minutes degreasing and rust removals, take out after waste diamond cutter, with distilled water wash for several times;
Rectangle electrolyzer, a titanium frame anode, a metallic titanium plate negative electrode, negative electrode wraps up with filter bag, and electrolytic solution is for containing 0.90mol/L sulphuric acid soln, and current density is 400A/m
2, electrolysis 24h, scraping copper powder, processes final vacuum with benzotriazole ethanolic soln as oxidation inhibitor dry, and obtaining purity is 80.2% copper powder 116.4g, and copper recovery is 79.43%.In electrolytic solution copper, nickel, iron, tin content be respectively 0.88,0.97,18.45,0.73g/L; In the anode sludge, silver content is 1.69%, and concentration ratio is 2.5.
Embodiment 2
Take waste diamond cutter 600g, being placed in by 5% sulfuric acid and thiocarbamide is the mixing solutions of 95: 2 in mass ratio, stirs 20 minutes degreasing and rust removals, take out after waste diamond cutter, with distilled water wash for several times;
Rectangle electrolyzer, a titanium frame anode, a metallic titanium plate negative electrode, negative electrode wraps up with filter bag, and electrolytic solution is for containing 1.84mol/L sulfuric acid and 0.18mol/L sodium chloride solution, and current density is 400A/m
2, electrolysis 24h, scraping copper powder, processes final vacuum with benzotriazole ethanolic soln as oxidation inhibitor dry, and obtaining purity is 89.5% copper powder 156.9g, and copper recovery is 83.57%.In electrolytic solution copper, nickel, iron, tin content be respectively 0.96,1.01,20.38,0.65g/L; In the anode sludge, silver content is 2.35%, and concentration ratio is 3.5.
Embodiment 3
Take waste diamond cutter 600g, being placed in by 5% sulfuric acid and thiocarbamide is the mixing solutions of 95: 5 in mass ratio, stirs 15 minutes degreasing and rust removals, take out after waste diamond cutter, with distilled water wash for several times;
Rectangle electrolyzer, a titanium frame is made anode, and two metallic titanium plates are made negative electrode, are placed in respectively anode both sides, and negative electrode wraps up with filter bag, and electrolytic solution is for containing 1.84mol/L sulfuric acid, 0.15 mol/L copper sulfate and 0.18 mol/L sodium chloride solution, and current density is 400A/m
2, electrolysis is 24h, and scraping copper powder is processed final vacuum with benzotriazole ethanolic soln dry, and obtaining purity is 90.7% copper powder 164.1g, and copper recovery is 88.76%.In electrolytic solution copper, nickel, iron, tin content be respectively 0.55,1.01,20.38,0.65g/L; In the anode sludge, silver content is 2.76%, and concentration ratio is 4.0.
Embodiment 4
Take waste diamond cutter 600g, being placed in by 8% sulfuric acid and thiocarbamide is the mixing solutions of 95: 2 in mass ratio, stirs 15 minutes degreasing and rust removals, take out after waste diamond cutter, with distilled water wash for several times;
Rectangle electrolyzer, a titanium frame is anode, two metallic titanium plates are negative electrode, be placed in respectively anode both sides, negative electrode wraps up with filter bag, and electrolytic solution is for containing 2.85 mol/L sulfuric acid, 0.23 mol/L copper sulfate and 0.26 mol/L sodium chloride solution, and current density is 450A/m
2, electrolysis 24h, scraping copper powder, processes final vacuum with benzotriazole ethanolic soln dry, and obtaining purity is 93.4% copper powder 163.2g, and copper recovery is 90.72%.In electrolytic solution copper, nickel, iron, tin content be respectively 0.45,1.41,30.56,0.78g/L; In the anode sludge, silver content is 2.88%, and concentration ratio is 4.5.
Embodiment 5
Take waste diamond cutter 600g, being placed in by 8% sulfuric acid and thiocarbamide is the mixing solutions of 95: 5 in mass ratio, stirs 10 minutes degreasing and rust removals, take out after waste diamond cutter, with distilled water wash for several times;
Rectangle electrolyzer, a titanium frame is anode, and two metallic titanium plates are negative electrode, are placed in respectively anode both sides, and negative electrode wraps up with filter bag, and electrolytic solution is for containing 3.57mol/L sulfuric acid, 0.15 mol/L copper sulfate and 0.34 mol/L sodium chloride solution, and current density is 450A/m
2, electrolysis 24h, scraping copper powder, processes final vacuum with benzotriazole ethanolic soln dry, and obtaining purity is 98.5% copper powder 156.6g, and copper recovery is 91.79%.In electrolytic solution copper, nickel, iron, tin content be respectively 0.24,1.47,35.56,0.98g/L; In the anode sludge, silver content reaches 3.10%, and concentration ratio is 4.7.
Embodiment 6
Take waste diamond cutter 600g, being placed in by 10% sulfuric acid and thiocarbamide is the mixing solutions of 95: 2 in mass ratio, stirs 10 minutes degreasing and rust removals, take out after waste diamond cutter, with distilled water wash for several times;
Rectangle electrolyzer, a titanium frame is anode, two metallic titanium plates are negative electrode, be placed in respectively anode both sides, negative electrode wraps up with filter bag, and electrolytic solution is for containing 4.08 mol/L sulfuric acid, 0.31 mol/L copper sulfate and 0.18 mol/L sodium chloride solution, and current density is 485A/m
2, electrolysis 24h, scraping copper powder, processes final vacuum with benzotriazole ethanolic soln dry, and obtaining purity is 99.0% copper powder 157.1g, and copper recovery is 92.57%.In electrolytic solution copper, nickel, iron, tin content be respectively 0.20,1.49,35.68,1.03g/L; In the anode sludge, silver content reaches 3.28%, and concentration ratio is 5.1.
Embodiment 7
Take waste diamond cutter 600g, being placed in by 10% sulfuric acid and thiocarbamide is the mixing solutions of 95: 5 in mass ratio, stirs 20 minutes degreasing and rust removals, take out after waste diamond cutter, with distilled water wash for several times;
Rectangle electrolyzer, a titanium frame is anode, two metallic titanium plates are negative electrode, be placed in respectively anode both sides, negative electrode wraps up with filter bag, and electrolytic solution is for containing 4.59 mol/L sulfuric acid, 0.31 mol/L copper sulfate and 0.34 mol/L sodium chloride solution, and current density is 500A/m
2, electrolysis 24h, scraping copper powder, processes final vacuum with benzotriazole ethanolic soln dry, and obtaining purity is 99.13% copper powder 157.1g, and copper recovery is 92.68%.In electrolytic solution copper, nickel, iron, tin content be respectively 0.18,1.49,35.70,1.03g/L; In the anode sludge, silver content reaches 3.26%, and concentration ratio is 5.0.
Embodiment 8
Take waste diamond cutter 600g, being placed in by 10% sulfuric acid and thiocarbamide is the mixing solutions of 95: 5 in mass ratio, stirs 20 minutes degreasing and rust removals, take out after waste diamond cutter, with distilled water wash for several times;
Rectangle electrolyzer, a titanium frame is anode, and two metallic titanium plates are negative electrode, are placed in respectively anode both sides, and negative electrode wraps up with filter bag, and electrolytic solution is that current density is 400A/m containing the solution of 4.59 mol/L sulfuric acid and 0.08 mol/L copper sulfate
2, electrolysis 24h, scraping copper powder, processes final vacuum with benzotriazole ethanolic soln dry, and obtaining purity is 99.25% copper powder 156.9g, and copper recovery is 92.68%.In electrolytic solution copper, nickel, iron, tin content be respectively 0.15,1.63,38.51,1.28g/L; In the anode sludge, silver content reaches 8.37%, and concentration ratio is 16.74.
Claims (1)
1. the electrolytic recovery method of copper in a waste diamond cutter, it is characterized in that waste diamond cutter to be placed in is 95: 2 ~ 5 5% ~ 10% sulfuric acid in mass ratio: thiocarbamide mixed solution, stir 10 ~ 20 minutes degreasing and rust removals, take out after waste diamond cutter, with distilled water wash several; Waste diamond cutter after degreasing and rust removal is packed in netted titanium conductive pane as anode, taking titanium plate as negative electrode; Content be the sulphuric acid soln of 0.50 ~ 5.00mol/L or copper sulfate that copper content is 0.05 ~ 0.40mol/L and the sulfuric acid content mixing solutions that is 0.50 ~ 5.00mol/L as electrolytic solution, or in described electrolytic solution, add the sodium chloride solution of 0.10 ~ 0.40mol/L; Current density is 300 ~ 600A/m
2, bath voltage is 1.0 ~ 2.0V, after electrolysis 24h, and scraping copper powder, after processing with benzotriazole ethanolic soln, vacuum-drying.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410249879.3A CN104047022A (en) | 2014-06-09 | 2014-06-09 | Electrolyzing and recovering method for copper in waste diamond cutter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410249879.3A CN104047022A (en) | 2014-06-09 | 2014-06-09 | Electrolyzing and recovering method for copper in waste diamond cutter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104047022A true CN104047022A (en) | 2014-09-17 |
Family
ID=51500406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410249879.3A Pending CN104047022A (en) | 2014-06-09 | 2014-06-09 | Electrolyzing and recovering method for copper in waste diamond cutter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104047022A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107254691A (en) * | 2017-06-13 | 2017-10-17 | 青岛聚鑫园工贸有限公司 | A kind of method by electric capacity comprehensive reutilization waste diamond tool valuable element |
| CN107406996A (en) * | 2015-06-03 | 2017-11-28 | 哈利伯顿能源服务公司 | Electrochemistry removes metal or other materials from polycrystalline diamond |
| CN108707926A (en) * | 2018-06-19 | 2018-10-26 | 福建洋屿环保科技股份有限公司 | A kind of useless diamond segment electroleaching recycling process for copper |
| CN109234764A (en) * | 2018-11-02 | 2019-01-18 | 广东明方科技有限公司 | A kind of electrolyte for the Buddha's warrior attendant cutter head recycling diamond dust that gives up |
| CN109706480A (en) * | 2019-03-08 | 2019-05-03 | 广东佳纳能源科技有限公司 | The separation method of corronil and its application |
| CN114672656A (en) * | 2022-04-11 | 2022-06-28 | 中南大学 | Resource treatment method for waste diamond tool bits |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4256553A (en) * | 1980-01-23 | 1981-03-17 | Envirotech Corporation | Recovering copper from chalcopyrite concentrate |
| JP2005054249A (en) * | 2003-08-06 | 2005-03-03 | Sumitomo Metal Mining Co Ltd | Method for removing copper from anode slime after copper electrolysis |
| CN101343772A (en) * | 2008-07-30 | 2009-01-14 | 宁波大学 | Process for recovering electroplating diamond head |
| CN101974689A (en) * | 2010-09-26 | 2011-02-16 | 金川集团有限公司 | Method for processing material containing copper |
| CN102554186A (en) * | 2012-02-17 | 2012-07-11 | 重庆重冶铜业有限公司 | Method for preparing copper electrolysis anode plate |
| CN102660685A (en) * | 2012-05-07 | 2012-09-12 | 南昌大学 | Method for recycling waste diamond tool |
-
2014
- 2014-06-09 CN CN201410249879.3A patent/CN104047022A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4256553A (en) * | 1980-01-23 | 1981-03-17 | Envirotech Corporation | Recovering copper from chalcopyrite concentrate |
| JP2005054249A (en) * | 2003-08-06 | 2005-03-03 | Sumitomo Metal Mining Co Ltd | Method for removing copper from anode slime after copper electrolysis |
| CN101343772A (en) * | 2008-07-30 | 2009-01-14 | 宁波大学 | Process for recovering electroplating diamond head |
| CN101974689A (en) * | 2010-09-26 | 2011-02-16 | 金川集团有限公司 | Method for processing material containing copper |
| CN102554186A (en) * | 2012-02-17 | 2012-07-11 | 重庆重冶铜业有限公司 | Method for preparing copper electrolysis anode plate |
| CN102660685A (en) * | 2012-05-07 | 2012-09-12 | 南昌大学 | Method for recycling waste diamond tool |
Non-Patent Citations (4)
| Title |
|---|
| 王明涌等: ""废杂铜电解制铜粉过程典型金属杂质的迁移规律"", 《中国稀土学报》 * |
| 贺小塘等: ""镀铑铜丝的综合回收"", 《贵金属》, vol. 32, no. 1, 15 February 2011 (2011-02-15), pages 65 - 67 * |
| 郭灵虹等: ""废金刚石刀具综合回收工艺研究"", 《无机盐工业》, no. 6, 20 December 1995 (1995-12-20), pages 26 - 28 * |
| 青海省地质科学研究所第四研究室: ""电解回收金刚石的小结"", 《青海国土经略》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107406996A (en) * | 2015-06-03 | 2017-11-28 | 哈利伯顿能源服务公司 | Electrochemistry removes metal or other materials from polycrystalline diamond |
| US10406501B2 (en) | 2015-06-03 | 2019-09-10 | Halliburton Energy Services, Inc. | Electrochemical removal of metal or other material from polycrystalline diamond |
| CN107254691A (en) * | 2017-06-13 | 2017-10-17 | 青岛聚鑫园工贸有限公司 | A kind of method by electric capacity comprehensive reutilization waste diamond tool valuable element |
| CN108707926A (en) * | 2018-06-19 | 2018-10-26 | 福建洋屿环保科技股份有限公司 | A kind of useless diamond segment electroleaching recycling process for copper |
| CN109234764A (en) * | 2018-11-02 | 2019-01-18 | 广东明方科技有限公司 | A kind of electrolyte for the Buddha's warrior attendant cutter head recycling diamond dust that gives up |
| CN109706480A (en) * | 2019-03-08 | 2019-05-03 | 广东佳纳能源科技有限公司 | The separation method of corronil and its application |
| CN114672656A (en) * | 2022-04-11 | 2022-06-28 | 中南大学 | Resource treatment method for waste diamond tool bits |
| CN114672656B (en) * | 2022-04-11 | 2023-03-10 | 中南大学 | Resource treatment method for waste diamond tool bits |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Fogarasi et al. | Copper recovery and gold enrichment from waste printed circuit boards by mediated electrochemical oxidation | |
| CN104047022A (en) | Electrolyzing and recovering method for copper in waste diamond cutter | |
| Wu et al. | Fundamental study of lead recovery from cerussite concentrate with methanesulfonic acid (MSA) | |
| JP6173595B2 (en) | Apparatus and method for non-smelting recycling of lead acid batteries | |
| CN104911636B (en) | Clean process for comprehensively recovering diamond and various metal resources from waste diamond tools | |
| Qiang et al. | Sequential stepwise recovery of selected metals from flue dusts of secondary copper smelting | |
| KR102427533B1 (en) | How to Dispose of Lithium Ion Waste Batteries | |
| Maruthamuthu et al. | Elecrokinetic separation of sulphate and lead from sludge of spent lead acid battery | |
| Su | Electrochemical separations for metal recycling | |
| CN104775036A (en) | Method for recovering noble metal from waste titanium anodes with noble metal coatings | |
| CN1418985A (en) | Electrochemical decomposition method for high-temp. alloy | |
| Song et al. | Equilibrium between titanium ions and high-purity titanium electrorefining in a NaCl-KCl melt | |
| Liang et al. | Electrolyte circulation: Metal recovery from waste printed circuit boards of mobile phones by alkaline slurry electrolysis | |
| CN104947155A (en) | Process for recovering copper from waste circuit board to prepare high purity and high strength copper foil based on electrochemical method | |
| CN105861822B (en) | A kind of acids reduction leaching method of cobalt copper mixed oxidization ore deposit | |
| JP2019527769A (en) | Concentrating and recovering precious metals | |
| CN104651880B (en) | The method that a kind of decopper(ing) point cyanogen simultaneous PROCESS FOR TREATMENT silver smelts the lean solution containing cyanogen | |
| CN105980303B (en) | The purifying of tungsten carbide composition | |
| CN103394360B (en) | Preparation method of regenerative catalyst | |
| Owais | Direct electrolytic refining of lead acid battery sludge | |
| JP2015148008A (en) | Recovery system of high purity metal from conductive oxide | |
| RU2534093C2 (en) | Method of copper-electrolyte processing | |
| Ogawa et al. | Copper recycling technique using electrochemical processes | |
| Lee et al. | Electrorefining of CuZr Alloy Using Ba 2 ZrF 8-LiF Electrolyte | |
| JP2013001979A (en) | Removing liquid of oxide film on surface of copper and copper-based alloy |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140917 |