溶剂萃取法提取电镀污泥氨浸出渣中的金属资源  

Recovery of Metal from Ironchromium Residueby Means of Solvent Extraction

作　　者：万鹏[1] 叶波清[1] 杨志华[1] 蒋展鹏[1] 

机构地区：[1]清华大学环境科学与工程系

出　　处：《环境科学》1998年第3期35-38,共4页Environmental Science

基　　金：国家"八五"科技攻关项目

摘　　要：研究硫酸浸出、Ｐ５０７－煤油－硫酸体系萃取分离铁、钠皂－Ｐ２０４－煤油－硫酸体系共萃铬、铝，反萃取分离铬、铝工艺回收电镀污泥氨浸渣中的金属．通过优化实验，确定了全流程的最佳工艺参数．结果表明，铁铬渣中的金属铬、铝和铁均可以高纯度盐类形式回收，可作为化学试剂使用，回收率达９５％以上．A solvent extraction process for valuable metals recovery from residue left ammonia carbonate leaching of plating sludge has been developed.This process include sulfuric leaching of the residue,separation of Fe^3+ using PC88AkeroseneH_2SO_4 extraction system,coextraction of Cr^3+ and Al^3+ using saponated D 2EHPAkeroseneH_2SO_4 extraction system and stripping separation of Cr^3+ and Al^3+.The optimum operation parameters of each unit were determined in laboratory.The results showed that the recovery rates of chromium,aluminum and iron are all more than 95%.CrCl_3·6H_2O,Al_2(SO_4)_3·18H_2O and FeCl_3·6H_2O with high purity were obtained in this process and could be used as chemical reagents.

关 键 词：电镀污泥 废水处理 重金属回收 溶剂萃取 

分 类 号：X781.03[环境科学与工程—环境工程]