摘要
以废旧三元锂电池正极材料为原料,经湿法浸出、化学沉淀、萃取分离等工序,回收废旧三元锂电池正极材料中的镍、钴和锂。考察了H_(2)SO_(4)-H_(2)O_(2)体系工艺参数对浸出效果的影响,通过单因素条件试验确定浸出的最佳工艺条件。结果表明:浸出温度90℃、酸料比2∶1、双氧水/料值(mL/g)1.33、液固比(mL/g)10∶1、浸出时间1 h的最佳浸出条件下,渣率低,镍、钴、锰、锂的浸出率均可超过99%;浸出液用30%的NaOH溶液进行中和沉淀,在中和时间2 h、温度90℃、终点pH值3.7的条件下,除铁后液中铁的含量小于0.005 g/L,镍、钴损失率在1%以下.
Applying cathode material of spent ternary lithium ion batteries as raw material,nickel cobalt and lithium in cathode material were recovered through leaching,chemical precipitation,extraction and separation.The influence of various factors of H_(2)SO_(4)-H_(2)O_(2) system on leaching effect was investigated.The optimum leaching conditions were determined by single factor condition test.The results show that under the optimal leaching conditions of leaching temperature 90℃,acid/material ratio 2∶1,H_(2)O_(2)/material value(mL/g)1.33,liquid/solid ratio(mL/g)10∶1,leaching time 1 h,the slag rate was low.The leaching rate of nickel,cobalt,manganese and lithium could reach more than 99%.The leaching solution was neutralized and precipitated with 30%NaOH solution for 2 h.Under the conditions of time 2 h,temperature 90℃and terminal pH 3.7,the iron content in the solution after iron removal was less than 0.005 g/L,and the loss rate of nickel and cobalt was less than 1%.
作者
赵峰
蒋训雄
汪胜东
李达
ZHAO Feng;JIANG Xun-xiong;WANG Sheng-dong;LI Da(BGRIMM Technology Group,Beijing 100160,China)
出处
《矿冶》
CAS
2022年第5期71-75,共5页
Mining And Metallurgy
基金
矿冶科技集团有限公司基金资助项目(02-1917)。
关键词
废旧三元锂电池
回收
镍
钴
锂
spent ternary lithium ion batteries
recovery
nickel
cobalt
lithium
