从电子脚镀锡铜针中回收锡和铜.pdf

2013年第9期
有色金属(冶炼部分)(http://ysyl.bgrimm.cn>
doi:10.3969/j.is.1007-7545.2013.09.005
从电子脚镀锡铜针中回收锡和铜
陈亮,王勇,熊振坤,陈斌
(广东清远云铜有色金属有限公司,广东清远511545)
摘要:介绍了从电子脚镀锡铜针中回收錫和铜的工艺研究及生产实践。采用常温碱性电解脱锡,电解液
无须加热循环流动,控制电流密度200A/m2、槽电压0.2~0.4V,电解液含Sn8~15g/L、NaOH60~
120g/L时,铜、锡的直收率分别达到99.7%和94.5%。脱锡铜针抛光处理后可以直接电解生产符合
GB/T467一2010标准中Cu-CATH-1要求的阴极铜,电解条件:装填光亮铜针高出电解液面5cm以上,
电流密度200A/m2,槽电压0.7V,电解液含Cu45~50g/し、H2SO150~180g/I
关键词;镀锡铜针;电解脱锡;电解;阴极铜;回收
中图分类号:X705;TF811;TF814文献标志码:A文章编号:1007-7545(2013)09-0015-04
Recovery of Tin and Copper from Electronic Foot Tin Plated Copper Needle
CHEN Liang, WANG Yong, XIONG Zhen-kun, CHEN Bin
Guangdong Qingyuan Yunnan Copper Nonferrous Metals Co., Ltd, Qingyuan 511545, Guangdong, China)
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/m", cell voltage of 0.2-0.4 V, electrolyte compo
sition 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/TA67-2010 standards is directly electrolyzed from polished detinning cop
per needle under the electrolysis conditions including copper needle being 5 cm higher than electrolytic lie
uid level, current density of 200 A/m, cell voltage of 0.7V, electrolyte composition of Cu of4550 g/L
and H2 SO, of 150-180 g/L
Key words: tin plated copper needle; de-tinning with alkaline electrolysis; electrolysis; cathode copper; re-
covery
近年来,电子及通讯、汽车、电线电缆等行业发法、电化学法和化学法等。火法电解法没有预先回
展迅猛,生产过程中镀锡边角废料及可回收的镀锡收锡,而是将镀锡废铜料当作一种铜废料,加入铜阳
废料日益增多,每年这种废料多达40~50万t。镀极炉、氧化还原熔炼浇铸成阳极板,经电解精炼生产
锡废铜料一般含铜91.0%~96.5%、锡1.5%~阴极铜。此工艺因大量的锡进入炉渣而未能实现锡
3.0%。从此类废料回收铜和锡有可观的经济效益的有效回收,当炉料含锡高时,要将阳极板中的锡除
和显著的社会效益。
至小于0.2%以满足电解精炼的需要,能耗大,生产
目前,镀锡废铜料的回收工艺主要有火法电解成本高。电化学法可以不侵蚀铜基体,并能回收
收稿日期:2013-02-24
作者简介:陈亮(1985-),男,湖南衡阳人,助理工程师,硕士研究生