粗铟电解过程中铅锡杂质电迁移规律研究  

Electromigration of Lead and Tin Impurities During Crude Indium Electrolysis Process

作　　者：侯忠敏 王晓民[2] 王红哲 朱中华 李继东[1] 王一雍[1] HOU Zhongmin;WANG Xiaomin;WANG Hongzhe;ZHU Zhonghua;LI Jidong;WANG Yiyong(School of Materials and Metallurgy,University of Science and Technology Liaoning,Anshan 114051,China;School of Materials Science and Engineering,Yingkou Institute of Technology,Yingkou 115014,China)

机构地区：[1]辽宁科技大学材料与冶金学院,辽宁鞍山114051 [2]营口理工学院材料科学与工程学院,辽宁营口115014

出　　处：《湿法冶金》2022年第2期137-140,共4页Hydrometallurgy of China

基　　金：辽宁省自然科学基金区域创新联合基金资助项目(2020-YKLH-27);辽宁省化学助剂合成与分离省市共建重点实验室项目(ZJNK2001);营口理工学院科技创新团队项目(TD201901)。

摘　　要：研究了采用电解精炼法制备高纯铟。在电流密度50 A/m^(2)、极距80 mm恒定条件下,考察了电解时间、硫酸铟浓度、电解液pH对电解液中Pb^(2+)、Sn^(2+)浓度变化的影响;结合In-Pb-Sn电位-pH图,分析了Pb、Sn杂质在电解液中的电迁移机制。结果表明:电解过程中,铅并未参与电解反应,而是沉积到阳极泥中;在电解液中硫酸铟质量浓度30 g/L、连续电解0.5 h、电解液pH<2.5条件下,电解液中Sn^(2+)质量浓度达最大,不与In^(3+)发生共沉积,可以有效去除。The preparation of high purity indium by electrolytic refining was investigated.The effects of electrolysis time,indium sulphate concentration and electrolyte pH on changes of Pb^(2+) and Sn^(2+) concentrations in electrolyte were examined under the constant conditions of current density of 50 A/m 2 and pole distance of 80 mm.Combined with In-Pb-Sn potential-pH diagram,the electromigration mechanisms of Pb and Sn impurities in electrolyte were analyzed.The results show that Pb do not participate electrolysis reaction but deposite into anode sludge.Under the conditions of indium sulphate of 30 g/L,continuous electrolysis time of 0.5 h and electrolyte pH<2.5,the mass concentration of Sn^(2+) in the electrolyte reaches the maximum,which can be effectively removed without co-deposit with In^(3+).

关 键 词：电解 铟 杂质 电迁移 共沉积 

分 类 号：TF803.27[冶金工程—有色金属冶金] TF803.25