银电解废液净化方法浅析  

Analysis on purification methods of silver electrolyte waste liquor

作　　者：刘庆杰 胡世勋 赵国成 

机构地区：[1]中冶葫芦岛有色金属集团公司技术中心,辽宁葫芦岛125003

出　　处：《中国有色冶金》2011年第1期22-26,共5页China Nonferrous Metallurgy

摘　　要：在银电解过程中,阳极板中的Cu、Pb、Bi、Sb等杂质会发生电化学溶解进入电解液中,对银粉质量造成影响。通常采用以下方法除去这些杂质:①硫酸法沉铅;②水解法除铋、锑;③热分解法除铜;④氯化钠沉银;⑤铜片置换法;⑥氢氧化钠沉淀法。方法①～⑤综合除杂能力不强、工艺流程复杂,应用受到了一定的限制;氢氧化钠沉淀法是一种相对比较新的净化方法,具有综合除杂能力强和工艺流程简单等优点,其应用越来越广泛。During the silver electrolysis,the impurity elements in the anode plate such as Cu,Pb,Bi and Sb are often gone into the electrolyte by electrochemical solution,and will affect the quality of silver powder.The meth ods removing these impurity elements are follow：① depositing lead by sulfuric acid process;② removing Bi and Sb by hydrolysis-precipitation;③ removing Cu by pyrolytic process;④ depositing silver by sodium chloride;⑤ substitution method by copper sheet;⑥ precipitation by sodium hydroxide.The method of precipitation by sodium hydroxide is a new purification method with widely application,the ability to remove the impurity elements is strong and the process is simple.

关 键 词：银电解 废液净化 银粉质量 

分 类 号：X758[环境科学与工程—环境工程]