铟冶炼中间废渣回收铟的工艺研究与应用

Process research and application of indium waste residue in indium smelting

本文介绍了关于综合回收铟冶炼过程中产生的几种废渣的工艺方法。通过对废渣水洗除氯、液固分离、除氯渣稀硫酸低酸浸出;浸出液根据不同金属化学电位不同的原理,使用与铟电位接近的还原铁粉净化除杂并液固分离;除杂溶液调整ph值水解富铟并分离二价铁,同时收铁;富铟渣用稀硫酸浸出后,使用铝板或锌粉置换回收海绵铟,置换后液调整ph值水解回收铝等系列生产步骤,废渣中铟总回收率达99%。同时,所用辅料铁铝分步回收,生产过程不产生废弃渣,生产工艺有很大推广价值。

This paper introduces the process methods of several kinds of waste residue produced in the process of comprehensive recovery of indium. Based on the waste residue washing dechlorination, solid-liquid separation, dechlorination dilute sulfuric acid leaching slag; leaching solution according to the principle of different metal chemical potential difference, and reduction of iron indium potential close to the purification and liquid-solid separation; impurity solution to adjust the pH value of hydrolysis and separation of indium rich two valent iron, at the same time iron; indium rich slag by sulfuric acid leaching, the use of aluminum or zinc recovery sponge indium, liquid aluminum series adjustment pH hydrolysis production step value after the replacement, the total recovery rate of 99% indium slag. At the same time, the auxiliary material, iron and aluminum, is recovered step by step, and the production process does not produce waste residue, and the production process has a great promotion value.