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| Recovery of Tin and Copper from Electronic Foot Tin Plated Copper Needle |
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Received:February 24, 2013
Revised:February 26, 2013
Accepted:February 27, 2013
Published Online:August 22, 2013
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| DOI：10.3969/j.issn.1007-7545.2013.09.005 |
| KeyWord:tin plated copper needle; de-tinning with alkaline electrolysis; electrolysis; cathode copper; recovery |
| Author | Institution |
| CHEN Liang |
广东清远云铜有色金属有限公司 |
| WANG Yong |
广东清远云铜有色金属有限公司 |
| XIONG Zhen-kun |
广东清远云铜有色金属有限公司 |
| Chen Bin |
广东清远云铜有色金属有限公司 |
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| Abstract: |
| The technical study and plant practice of recovery of tin and copper from electronic foot tin plated copper needle were introduced. Tin was separated by alkaline electrolysis at room temperature without heating and electrolyte circulating. The recovery rate of copper and tin is 99.7% and 94.5% respectively under the conditions including current density of 200 A/m2, cell voltage of 0.2~0.4 V, electrolyte composition of Sn of 8~15 g/L and NaOH of 60~120 g/L. Cathode copper according with the requirements of Cu-CATH-1 brand under GB/T467-2010 standards is directly electrolyzed from polished de-tinning copper needle under the electrolysis conditions including copper needle being 5 cm higher than electrolytic liquid level, current density of 200 A/m2, cell voltage of 0.7 V, electrolyte composition of Cu of 45~50 g/L and H2SO4 of 150~180 g/L. |
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