海绵铁中提取镓的研究  

Study on Comprehensive Recovery of Gallium from Sponge Iron

作　　者：刘志宏[1] 张登凯[1] 李玉虎[1] 李启厚[1] 艾侃[1] 

机构地区：[1]中南大学冶金科学与工程学院,湖南长沙410083

出　　处：《有色金属（冶炼部分）》2005年第3期33-35,39,共4页Nonferrous Metals（Extractive Metallurgy)

摘　　要：采用高酸浸出———铁粉还原浸出———富集———除铁———还原萃取工艺从海绵铁中回收镓。酸浸条件为起始酸度180g/LH2SO4、最终pH0 2、温度80℃。中浸采用铁粉调节pH4 2,经过3次循环,镓浸出率92 6%。以10%P204+90%磺化煤油+1 5%YW-100为萃取剂,水相与有机相相比为5∶1,pH1 5,镓的萃取率为99%。用6mol/L分析纯盐酸作反萃剂,反萃级数为3级,经氨水沉淀得到产物镓的纯度为97%。Recovering Ga from sponge iron by the following process is developed: strong-acid leaching, reduction leaching with sponge iron powder, enrichment, iron precipitating, reductive extraction. The acid leaching conditions is given as 180g/L H_2SO_4,pH 0.2 at 80℃. The sponge iron powder is used to adjust the pH up to 4.2. The extractive system consisted of 10%P_(204)+90%sulphied kerosene+1.5%YW-100, and under the experimental conditions of the ration of water phase and organic phase 5∶1, pH1.5, Ga recovery reaches 99%. After 3 series stripping using the muriatic acid as stripping agent, the 97% Ga can be obtained by ammonia precipitating.

关 键 词：海绵铁 镓 富集 萃取 

分 类 号：TF843[冶金工程—有色金属冶金] TF803.2