电积法从银电解废液中回收银的研究  

A Study on Recovery of Silver from Spent Solution by Electrodeposition

作　　者：谭明亮 杨泉 管有祥 熊庆丰 王时璋 彭春生 马方策 刘莉 TAN Mingliang;YANG Quan;GUAN Youxiang;XIONG Qingfeng;WANG Shizhang;PENG Chunsheng;MA Fangce;LIU Li(Yongxing Sino-Platinum Metals Resources Co. Ltd., Chenzhou 423399, Hunan, China;State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals, Sino-Platinum Metals Co. Ltd., Kunming 650106, China)

机构地区：[1]永兴贵研资源有限公司,湖南郴州423399 [2]贵研铂业股份有限公司稀贵金属综合利用新技术国家重点实验室,昆明650106

出　　处：《贵金属》2017年第3期17-19,27,共4页Precious Metals

摘　　要：研究了电沉积法从银电解废液中提取高纯银的工艺。考察了电解槽槽电压、银电解废液pH、酸度调节试剂对电沉积银的影响。结果表明,用20%氨水将银电解废液pH调到3,电解槽槽电压为1.8 V,电流密度为60 A/m^2,温度35℃,电沉积25 h后,银回收率大于99%,银粉达到国标(GB/T4135-2002)IC-Ag99.99%的纯度要求。The process of extracting silver from spent silver electrolyte by electrodeposition has been proposed.The influencing parameters,such as the electrolytic cell voltage and the pH of spent sliver electrolyte and the reagent for adjusting pH,were investigated in order to obtain the optimum process conditions.Silver produced from the process could conform to the state quality standard(GB/T4135-2002)for99.99%silver,when pH value of the electrolyte was adjusted to3with20%ammonia and the electrodeposition was carried out at35℃for25h under1.8V electrolytic cell voltage and60A/m2electric current density.The recovery rate of silver reached99%.

关 键 词：电沉积 电解废液 电解槽 银 回收 

分 类 号：TF832[冶金工程—有色金属冶金]