高锑锡阳极泥锡锑分离  

Separation of antimony and tin from high Sb-Sn anode slime

作　　者：陈绍春 陈绍雄 华一新[1] 苏瑞春 CHEN Shao-chun;CHEN Shao-xiong;HUA Yi-xin;SU Rui-chun(Faculty of Metallurgical and Energy Engineering,Kunming University of Science and Technology,Kunming 650093,China;Yunnan Tin Industry Research Institute Co.,Ltd.,Gejiu 661000,China)

机构地区：[1]昆明理工大学冶金与能源工程学院,云南昆明650093 [2]云南锡业研究院有限公司,云南个旧661000

出　　处：《中国有色冶金》2022年第3期48-53,共6页China Nonferrous Metallurgy

摘　　要：锑是锡冶炼中常见的杂质,锡锑分离是锡生产中经常遇到的难题之一。本文采用NaOH浸出→氧化沉锑→净化除杂→电积工艺,将锡阳极泥中的锡、锑分离,产出阴极锡试验结果表明:在NaOH初始浓度为167 g/L、液固体积质量比比为5∶1、浸出温度150℃、浸出时间60 min的条件下,锡浸出率为89.68%,锑浸出率为75.57%。浸出液氧化沉锑,锑沉淀率99%以上,产出的锑酸钠达到化工合格品质量标准要求。沉锑后液加入硫化钠脱铅后电积,电积产出阴极锡的质量达到精锡质量标准要求。该工艺能够将高锑锡阳极泥中大部分的锡和锑分离,以精锡和锑酸钠的形式分别予以回收,回收得到的产品的价值较高。Antimony is a common impurity in tin metallurgy.Sn and Sb separation is one of the key difficulties encountered in tin production.In this paper,the process of NaOH leaching→antimony oxide precipitation→purification and impurity removal→cathode antimony production by electrodeposition is used to separate tin and antinomy in tin anode slime.The test results show that with the initial concentration of NaOH of 167 g/L,a liquidsolid ratio of 5∶1,leaching temperature of 150℃and leaching time of 60 min,the tin leaching efficiency is 89.68%and the antimony leaching efficiency is 75.57%.Oxidative precipitation of antimony is conducted for the leachate,with an antimony precipitation rate of above 99%,and the produced sodium antimonate is up to the quality standard of chemical products.The liquid after antimony precipitation is added with sodium sulfide for lead removal and then electrodeposition is conducted.The quality of the cathode tin produced by electrodeposition is up to the quality standard of tin fine product.The technology can separate most of tin and antimony from the high Sb-Sn anode slime,which are recovered in the forms of tin fine product and sodium antimonate,the recovered products are of high value.

关 键 词：锡阳极泥 NaOH浸出 电积 锡锑分离 锑酸钠 

分 类 号：TF814[冶金工程—有色金属冶金] TF818