高铁闪锌矿还原浸出液直接萃取分离回收铟  

DIRECT EXTRACTION AND SEPARATION OF INDIUM FROM HIGH IRON SPHALERITE

作　　者：赵多强 魏昶[1] 李旻廷[1] 陈淑梅[1] 张帆[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：《矿冶》2015年第1期39-43,共5页Mining And Metallurgy

摘　　要：针对高铁闪锌矿湿法炼锌过程中产出的还原浸出液提出了预还原Fe3＋,P204直接萃取回收铟的工艺。还原浸出液中铁达到50g/L以上,Fe3＋占到10%左右,经预还原后Fe3＋降低到0.5g/L左右,还原过后的浸出液进行直接萃取分离回收铟。考察了原液pH、相比、有机相浓度、搅拌转速等条件对整个萃取过程的影响。铟的萃取率主要受P204浓度和溶液pH的影响,萃取过程平衡时间为1-2min。三级逆流萃取综合验证试验表明,铟的萃取过程稳定,萃取率在98%以上,铟铁分离效果良好,分离系数达到10000以上,整个过程无乳化现象产生。直接萃取法回收铟具有操作简单、流程短、直收率高等特点。The technology of prereduction Fe3 ＋ , P204 direct-extraction recovery of indium has been proposed to dispose the high iron sphalerite reduction lixivium in zinc hydrometallurgy process. The concentration of Fe is higher than 50 g/L and the concentration of Fe3＋ accounts for about 10% in the reduction lixivium. The concentration of Fe3＋ drops to about 0.5 g/L after prereduction and the reduction lixivium is used for the direct extraction. The influence of pH, phase ratio, organic phase concentration, stirring speed and other conditions for the extraction process have been investigated. Indium extraction rate is mainly influenced by P204 concentration and solution pH, and extraction balance time is 1 to 2 minutes. The comprehensive validation experiments of three-stage eountercurrent extraction show that the indium extraction process is stabe, the extraction rate is over 98% , indium-iron separating efficiency is good, the separation factor is above 10000 and no emulsification phenomenon occurs throughout the process. Direct extraction method has the advantages of simple operation, short process and high recovery efficiency.

关 键 词：高铁闪锌矿 直接萃取 铟 铁 

分 类 号：TF843.1[冶金工程—有色金属冶金]