废锂电三元正极材料和铝镍钴废磁钢混合物酸浸技术研究  

Study on Acid Leaching Technology of Waste NCM Battery Anode Materials and Al-Ni-Co Magnetic Scraps Mixtures

作　　者：熊以俊 许用华 张骏南 王元华 XIONG Yi-jun;XU Yong-hua;ZHANG Jun-nan;WANG Yuan-hua(Ganzhou Yihao Umicore Ltd.,Ganzhou 341000,Jiangxi,China)

机构地区：[1]赣州逸豪优美科实业有限公司,江西赣州341000

出　　处：《有色金属（冶炼部分）》2020年第6期19-23,共5页Nonferrous Metals（Extractive Metallurgy)

基　　金：江西省重点新产品计划项目(20141CX17100)。

摘　　要：采用酸浸技术浸出废锂电三元正极材料和铝镍钴废磁钢混合物中的钴、镍、铜、锂和锰等有价元素,考察了两种废料质量比、反应温度、反应时间、硫酸浓度、液固比等对有价元素浸出率的影响。较优浸出工艺条件为:两废料质量比2.33∶1、硫酸浓度1.1 mol/L、液固比6∶1、温度75℃、反应时间4 h,在此条件下,钴、铜、镍、锂和锰浸出率均高于99.5%;在酸性条件下Fe3+/Fe2+构成氧化-还原闭路循环反应,促进了浸出反应的进行。该工艺资源利用率高、环境友好,可为综合回收废旧锂电池三元正极材料及铝镍钴废磁钢提供一条新的技术路线。Valuable elements(Co,Cu,Ni,Li and Mn)were acid leached by mixing waste NCM battery anode materials and Al-Ni-Co magnetic scrap materials.Effects of mass ratio of two waste materials,reaction temperature,reaction time,sulfuric acid concentration,and L/S on leaching efficiency were investigated.Leaching rate of Co,Cu,Ni,Li,Mn is all above 99.5%under the optimum process including mass ratio of two waste materials of 2.33∶1,sulfuric acid concentration of 1.1 mol/L,L/S of 6∶1,reaction temperature of 75℃,and reaction time of 4 h.Fe3+/Fe2+ion forms a redox circulation reaction in acidic condition to ensure a continuous leaching reaction.This process is efficient,environment friendly and can provide an innovative process for integrated recovery of waste NCM battery anode materials and Al-Ni-Co magnetic scraps.

关 键 词：废锂电三元正极材料 铝镍钴废磁钢 有价元素 硫酸浸出 工艺条件 

分 类 号：X758[环境科学与工程—环境工程]