还原焙烧水浸法从废旧锂离子电池正极片中高选择性提锂  

Highly Efficient Selective Recovery of Lithium from Spent Positive Electrode Sheet of lithium Ion Battery by Thermal Reduction Roasting Water Immersion Method

作　　者：肖久成 谭枫 余萌 肖心力 孙颉 刘勇奇 巩勤学 XIAO Jiu-cheng;TAN Feng;YU Meng;XIAO Xin-li;SUN Jie;LIU Yong-qi;GONG Qin-xue(Hunan Brunp Recycling Technology Co.,Ltd.,Hunan Ningxiang 410604,China)

机构地区：[1]湖南邦普循环科技有限公司,湖南宁乡410604

出　　处：《广州化工》2022年第20期90-93,97,共5页GuangZhou Chemical Industry

摘　　要：采用改进的热还原技术从废旧正极片中有效回收锂,其中使用廉价的尿素作为提供氨(NH_(3))的唯一添加剂,考察了烧结温度、保温时间、质量比以及填充率对Li浸出率的影响。结果表明,在烧结温度为550℃、保温时间15 min、质量比1:2、填充率180 g/L的条件下,NCM材料中的Li浸出率达99.98%,基本没有其它金属浸出;而在烧结温度为600℃、保温时间30 min、质量比1:2、填充率180 g/L的条件下,LMO材料中的Li浸出率也高达98.49%。An improved thermal reduction technology was used to efficiently recycle Li from spent positive electrode powders,where cheap urea was applied as the only additive to provide ammonia(NH_(3)).The effects of roasting temperature,holding time,dosage ratio,and filling ratio on the leaching rate of recycle Li were investigated.The results showed that when the roasting temperature was 550℃,the holding time was 15 min,the dosage ratio was 1:2,and the filling ratio was 180 g/L,the leaching rate of Li reached 99.98%in NCM material.For LMO material,the optimum leaching rate of Li conditions were as follows:roasting temperature was 600℃,holding time was 30 min,dosage ratio was 1:2,and the filling ratio was 180 g/L.Under the conditions,the leaching rate of lithium was as high as 98.49%.

关 键 词：高选择性 锂回收 废旧锂离子电池 还原焙烧 水浸法 浸出率 

分 类 号：X705[环境科学与工程—环境工程] TQ131.11[化学工程—无机化工]