从废旧电池正极材料低酸浸出渣中高压酸浸钴镍锰锂试验研究  

High Pressure Acidic Leaching of Low Acidic Leaching Slag of Waste Battery Anode Material

作　　者：陈欢 张银亮 谭群英 唐红辉 李强 刘琴 CHEN Huan;ZHANG Yinliang;TAN Qunying;TANG Honghui;LI Qiang;LIU Qin(Hu′nan Brunp Recycling Technology Co.,Ltd.,Changsha 412600,China)

机构地区：[1]湖南邦普循环科技有限公司,湖南长沙412600

出　　处：《湿法冶金》2018年第5期388-392,共5页Hydrometallurgy of China

基　　金：国家科技支撑计划项目(2014BAC03B01)

摘　　要：针对废旧电池正极材料低酸浸出渣常压酸浸钴、镍、锰生产效率低、回收率不高等问题,研究了采用高压酸浸工艺浸出有价金属,考察了硫酸浓度、液固体积质量比、温度、反应时间、还原剂种类及加入量对钴、镍、锰、锂浸出率的影响。结果表明:在硫酸浓度4.0mol/L、液固体积质量比8.0mL/g、温度140℃、反应时间120min、还原剂五水硫代硫酸钠用量0.5g/8g渣条件下,钴、镍、锰、锂浸出率均在99%以上,钴、镍金属损失率不到0.2%,且浸出渣可循环利用,具有较好的工业应用价值。Aiming at the problems of low efficiency and low recovery rate of cobalt,nickel and manganese from acidic leaching residue under normal pressure acid leaching,the process of high pressure acidic leaching was used to treat low acidic leaching residue of positive electrode material of spent batteries.The effects of sulfuric acid concentration,liquid-to-solid ratio,reaction temperature,reaction time,kinds and amount of reducing agent on leaching of cobalt,nickel,manganese and lithium were investigated.The results show that under the conditions of sulfuric acid concentration of 4 mol/L,liquid-to-solid ratio of 8 mL/g,reaction temperature of 140℃,reaction time of 120 min,and addition amount of reducing agent sodium thiosulfate pentahydrate of 0.5 g/8 g slag,the leaching rate of cobalt,nickel,manganese and lithium are 99.83%,99.91%,99.92%and 99.97%,respectively.The loss rate of cobalt and nickel are less than 0.2%,and the leaching slag can be recycled.The method has good industrial application value.

关 键 词：废锂离子电池 正极材料 高压 酸浸 有价金属 

分 类 号：TF803.21[冶金工程—有色金属冶金]