有机除钴试剂对锌电积过程的影响  

Effect of organic cobalt removal reagent on zinc electrowinning process

作　　者：姚夏妍 牛永胜 汪友元[1,2] 李银丽 鲁兴武 程亮[1,2] 李俞良 YAO Xia-yan;NIU Yong-sheng;WANG You-yuan;LI Yin-li;LU Xing-wu;CHENG Liang;LI Yu-liang

机构地区：[1]白银有色集团股份有限公司西北矿冶研究院,甘肃白银730900 [2]甘肃省有色金属冶炼新工艺及伴生稀散金属高效综合利用重点实验室,甘肃白银730900

出　　处：《中国有色冶金》2021年第2期28-34,共7页China Nonferrous Metallurgy

基　　金：甘肃省工业绿色低碳转型升级研究课题(GGLD-2019-28);白银市2019年科技计划项目(2019-1-12G)。

摘　　要：湿法炼锌有机物除钴已成为一种趋势,但其对锌电积过程的影响机理还不明确,使用过程中存在影响锌电积、“烧板”现象。针对此问题,本文通过直接向配制的锌电解液添加福美钠以及利用福美钠除钴的新液配制的锌电解液研究了有机除钴试剂对锌电积过程的影响,结果表明:利用有机物福美钠除钴的同时,会引起新液中Zn^(2+)的损失,导致在锌电积过程中酸锌比失衡,引起锌电积电耗增加;电解液中一定浓度的福美钠会增加溶液黏度,少量的福美钠可降低溶液的表面能和黏度;福美钠粘附在阴极上,会引起氢在阴极强烈析出,出现“烧板”现象;利用紫外分光光度法测定福美钠是本实验发现的新方法,测定方法简单,标准物质易得,便于操作。Using organic cobalt remover in zinc hydrometallurgy has become a trend,but the mechanism of its influence on the zinc electrowinning process is still unclear,and there is a phenomenon of affecting zinc electrowinning and "burning plates". In response to this problem,this article studied the influence of organic cobalt removal reagents on the zinc electrowinning process by directly adding sodium dimethyldithiocarbamate to the prepared zinc electrolyte and the zinc electrolyte prepared with a new solution removed cobalt by sodium dimethyldithiocarbamate,and the following conclusions were drawn. The use of organic sodium dimethyldithiocarbamate to remove cobalt will cause the loss of Zn2+ in the new solution,resulting in an imbalance of the acid zinc ratio during the zinc electrowinning process,which will increase the electricity consumption of the zinc electrowinning;a certain concentration of sodium dimethyldithiocarbamate in the electrolyte will increase the viscosity of the solution,and a small amount of sodium dimethyldithiocarbamate can reduce the surface energy and viscosity of the solution;the adhesion of sodium dimethyldithiocarbamate on the cathode will cause hydrogen to precipitate strongly on the cathode,causing"burning"phenomenon;the ultraviolet spec-trophotometry method for the determination of thiram is a new method discovered in this experiment,and the determination method is simple,easy to operate,the standard material easy to obtain.

关 键 词：湿法炼锌 有机物除钴 锌电积 电耗 烧板 福美钠 紫外分光光度法 

分 类 号：TF813[冶金工程—有色金属冶金] TF803.27