用活化焙烧-硫酸浸出-溶剂萃取法从钴渣中提取硫酸钴的试验研究  

Preparation of Cobalt Sulphate From Cobalt-residue by Activating Roasting-Leaching With Sulfuric Acid-Solvent Extraction Process

作　　者：李昌林[1] 贾根贵 沙涛[2] 

机构地区：[1]中南大学冶金科学与工程学院,湖南长沙410083 [2]巴彦淖尔紫金有色金属有限公司,内蒙古巴彦淖尔015543

出　　处：《湿法冶金》2009年第1期28-31,共4页Hydrometallurgy of China

摘　　要：研发了一种从钴渣中提取硫酸钴的新工艺,即钴渣活化焙烧-硫酸浸出-溶剂萃取工艺。在活化焙烧温度900℃,活化剂添加量2∶1(添加剂与钴渣的质量比),焙烧时间1 h;硫酸浸出液固体积质量比5∶1,硫酸浓度20%,浸出温度90℃,浸出时间1.5 h条件下,钴浸出率为98.8%。然后采用P204萃取除杂-P507萃取分离钴、镍工艺得到纯净的高浓度钴溶液,蒸发结晶后得到质量符合HG3-914-78化学纯度要求的硫酸钴。A new process for extracting cobalt sulphate from cobalt-residue was developed. The process was consisted of activating roasting of cobalt residue-leaching of cobalt using sulfuric acid-solvent extraction for separating cobalt from impurities. The optimal parameters were determined by experiments. The result showed that the optimal parameters were roasting temperature of 900℃, activating agent addition of 2 ：1（mass ratio of activating agent to cobalt residue）, roasting time of 1 hour and ratio of liquid volume to solid mass of 5 ： 1, sulfuric acid concentration of 200 g/L and leaching temperature of 90℃. Under the optimal conditions, the leaching ratio of Co was of 98.8%. The impurities in the leaching solution was removed with P204 solvent extraction, and cobalt from nickel was separated by P507 solvent extraction. The cobalt sulphate solution was following evaporated to obtain pure cobalt sulphate complying with national standards HG3-914-78.

关 键 词：钴渣 活化焙烧 硫酸浸出 溶剂萃取 硫酸钴 

分 类 号：TF803.2[冶金工程—有色金属冶金] TF816