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%.
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)
出处
《贵金属》
CAS
CSCD
北大核心
2017年第3期17-19,27,共4页
Precious Metals
关键词
电沉积
电解废液
电解槽
银
回收
electro-deposition
spent solution of electrolyte
electrolytic cell
silver
recovery
