中文摘要：

研究用溶剂萃取法从低浓度铟的硬锌渣浸出液中富集铟,探讨萃取过程中有机相组成、浸出液初始pH、萃取相比（Va/Vo）、搅拌速度、两相混合时间对铟萃取率的影响,以及反萃取过程中,盐酸浓度、相比（Va/Vo）对铟反萃取率的影响。试验结果表明：在浸出液初始pH约为0.5、有机相组成为20%P204＋80%磺化煤油、搅拌速度为1 000r/min、萃取时间2min条件下,经过4级逆流萃取,两相分相效果较好,铟萃取率稳定在98%左右;反萃取过程中,用4mol/L盐酸作反萃取剂,水相残余酸度较低,铟单级反萃取率在92%以上。该低浓度铟溶液通过直接萃取-反萃取可以实现短流程、高收率、低能耗富集。

英文摘要：

The enrichment of indium from leaching solution of zinc slag was studied. The effects of solution initial pH, composition of organic phase, the volume proportion between aqueous phase and oil phase（Va/Vo）,agitation speed and time on extraction of indium, and in reverse extraction, the effects of hydrochloric acid concentration and volume proportion between aqueous phase and oil phase on reextraction ratio of indium were examined. The results show that the extraction rate of indium can reach around 98% by four-stages counter-current extraction under the optimal conditions of the leaching solution pH of 0.5,the organic phase composition of 20% P204＋80% sulfonated kerosene, agitation speed of 1 000 r/min and the agitation time of 2 min. In reextraction process,the one-stage re-extraction rate of indium is over 92% when using hydrochloric acid of 4 mol/L as re-extraction age nt. By extraction and re-extraction, the indium in low concentration solution can be enriched by the high efficiencv,energy saving and short proeess.