Reductive leaching of zinc and indium from industrial zinc ferrite particulates in sulphuric acid media  

湿法炼锌渣中锌和铟的还原浸出（英文）

作　　者：张帆[1] 魏昶[1] 邓志敢[1] 李存兄[1] 李兴彬[1] 李旻廷[1] 

机构地区：[1]昆明理工大学冶金与能源工程学院,昆明650093

出　　处：《Transactions of Nonferrous Metals Society of China》2016年第9期2495-2501,共7页中国有色金属学报（英文版）

基　　金：Project(2014CB643404)supported by the National Basic Research Program of China;Projects(51564030,51474117,51304093,51364022)supported by the National Natural Science Foundation of China;Project(0120150070)supported by Yunnan Applied Basic Reach Project,China;Project(ZD2014003)supported by the Education Department of Yunnan Province,China

摘　　要：Zinc ferrite is the principal constituent in zinc neutral-leach residue（NLR） which is commonly treated by hot-acid leaching in electrolytic zinc plants. Reductive leaching of zinc ferrite with sphalerite concentrate as a reducing agent was performed. It was found that leaching of zinc ferrite in the presence of sphalerit concentrate was a viable process that effectively extracted zinc and indium and converted Fe^3＋ into Fe^2＋ at the same time. Reflux leaching tests by two stages were performed to achieve extractions of 98.1% for zinc and 97.5% for indium, and a Fe^2＋/Fe^3＋ molar ratio of 9.6 in leach solution was also obtained. The leaching behaviors of other elements, such as iron, copper and tin were also studied. The results showed that iron and copper were completely leached, whereas tin presented lower extraction values.铁酸锌是锌中性浸出渣中的主要物相,热酸浸出是处理中性浸出渣的主要方法之一。研究了一种采用硫化锌精矿作为还原剂对锌中性浸出渣进行还原浸出的方法。研究发现,采用硫化锌精矿作为还原剂不仅能高效浸出锌中性浸出渣中的有价金属,而且同时实现溶液中Fe^(3+)向Fe^(2+)的还原。采用两段逆流浸出工艺,98.1%锌和97.5%铟被浸出,浸出液中Fe^(2+)/Fe^(3+)的摩尔比达到9.6。同时发现,浸出过程中铁和铜几乎完全浸出,而锡只有部分浸出。

关 键 词：reductive leaching zinc ferrite ZINC INDIUM sphalerite concentrate 

分 类 号：TF813[冶金工程—有色金属冶金] TF843.1