废旧三元锂电池回收中间产物铝渣的资源化研究  

Resource Utilization of Aluminum Slag in Recycling of Spent Ternary Li-ion Batteries

作　　者：乔延超 邓浩臻 阮丁山 何芳 罗琳[1] 罗双 QIAO Yan-chao;DENG Hao-zhen;RUAN Ding-shan;HE Fang;LUO Lin;LUO Shuang(College of Resources and Environment,Hunan Agricultural University,Changsha 410128,Hunan,China;Guangdong Brunp Recycling Technology Co Ltd,Foshan 528137,Guangdong,China)

机构地区：[1]湖南农业大学资源环境学院,湖南长沙410128 [2]广东邦普循环科技有限公司,广东佛山528137

出　　处：《矿冶工程》2022年第6期100-104,共5页Mining and Metallurgical Engineering

基　　金：广东省电池循环利用企业重点实验室(2021年度)(2021B1212050002);三水工业园区重大技术攻关项目(三元锂电池正极材料电加热回转窑烧结工艺研究与应用)。

摘　　要：采用氢氧化钠碱浸-碳分工艺处理废旧电池回收中间产物——铝渣,实现了废渣中的镍钴锰与铝分离并分步回收。结果表明,在反应温度200℃、氢氧化钠浓度6 mol/L、苛性比为5、碱浸5 h条件下,碱浸液中铝浸出率可达97.70%,镍钴锰浸出率小于0.23%;碱浸渣经浸出-除杂-萃取后,得到Ni、Co、Mn含量均大于100 g/L,Fe、Al含量均小于0.001 g/L的纯净硫酸镍、硫酸钴、硫酸锰溶液,从而实现废旧三元锂电池中铝与镍钴锰的资源化高效回收利用。Aluminum slag, as the intermediate in recycling spent batteries, was treated with a technical process of alkaline leaching with sodium hydroxide followed by carbon separation to achieve the separation and respective recycling of nickel, cobalt, manganese from aluminum. It is found that after a 5-h alkali leaching at 200 ℃, with sodium hydroxide concentration of 6 mol/L, molar ratio of Na2O to Al2O3at 5, the leaching rate of aluminum from the alkali leaching solution can reach 97.70%, and the Ni-Co-Mn leaching rate is less than 0.23%. Then, the obtained alkali residue is subjected to a combined process of leaching, impurity removal and extraction, resulting in pure nickel sulfate, cobalt sulfate and manganese sulfate solution, with the concentration of Ni, Co and Mn all more than 100 g/L, and the concentration of Fe and Al less than 0.001 g/L. With this technique, high-efficient utilization of Ni, Co and Mn resources from spent ternary Li-ion batteries can be actualized.

关 键 词：废旧三元锂电池 废旧电池回收 铝渣 碱浸 硫酸镍 硫酸钴 硫酸锰 

分 类 号：TF111[冶金工程—冶金物理化学]