湿法冶金

针对以电解法生产高纯银过程中杂质铜难以深度去除这一难题,在探明铜离子在银电解过程中的作用机制基础上,研究了以无铜离子电解体系电解银。试验结果表明:电解体系中无铜离子,通过添加试剂A、B,可以明显改善电解液的导电性能和电银粉的析出性能,电流效率提高6.5%,电银粉中铜质量分数低于0.000 5%,产品质量符合IC-Ag99.99国家标准。

Aiming at the problems of copper being hard to be further removed from electrolytic silver product,the electrolytic silver using copper-ions free electrolyte was studied based on the copper ions action mechanism in silver electrolysis process.The results show that no copper ions but adding reagents A and B in electrolyte,the conductive properties of electrolyte and precipitation properties of electrolytic silver powder can be obviously improved,current efficiency increases by 6.5%,and high purity silver product in which copper content is lower than 0.000 5%can be acquired.