铟电解精炼中电解液酸度对锡含量的影响  

Effect of acidity of electrolyte solution on level of tin in electrorefining indium

作　　者：周智华[1] 曾冬铭[2] 舒万艮[2] 莫红兵[2] 

机构地区：[1]湘潭工学院化工系,湘潭411201 [2]中南大学化学化工学院,长沙410083

出　　处：《中国有色金属学报》2003年第2期522-525,共4页The Chinese Journal of Nonferrous Metals

基　　金：国家"九五"科技攻关资助项目(96119040109)

摘　　要：研究了铟的电解精炼中电解液的选择与配制和酸度对杂质锡含量的影响,并初步探讨了电解液中锡离子的行为。研究表明:采用In2(SO4)3 H2SO4体系具有组成简单、操作方便、阳极无毒性气体析出的优点。锡在阴极主要以Sn2+的形式析出,电解液的酸度控制在pH值2～3之间,可将锡含量控制在最低水平。电解过程中,阴极pH值将增大,阳极pH值将变小,可通过加入H2SO4和固体的NaOH颗粒来控制电解液酸度。The selection and preparation of electrolyte solution, the change of acidity and the effect of acidity on level of tin in electrorefining indium were investigated, and the behavior of tin ion in electrolyte solution was studied. Electrolyte solution In2(SO4)3H2SO4 is simple and convenient in operation, and the evolution of poisonous gas is avoided on the anode. Sn2+ can be deposited on cathode, but the tin deposition is decreased to lowest at pH 2～3. pH would increase on the cathode region, but decrease on the anode region in electrolytic refining. The method of acidity control by adding sulfuric acid or solid sodium hydrate was described.

关 键 词：电解精炼 炼铟 电解液 酸度 锡含量 

分 类 号：TF843.1[冶金工程—有色金属冶金]