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中文摘要: 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，有效回收了废旧三元锂电池正极材料中的镍、钴和锂。首先考察了H2SO4和H2O2体系各因素对浸出效果的影响，通过单因素条件试验结果分析，确定了浸出最佳浸出条件为：浸出温度90℃，酸料比2:1，双氧水/料（mL/g）1.33，液固比（mL/g）10:1，浸出时间1h。在此条件下渣率低，镍、钴、锰和锂浸出率都能达到99%以上。浸出液用30%的NaOH溶液进行中和沉淀，时间2h，温度90℃，终点pH值3.7，除铁后液中铁的含量小于0.005g/L，镍、钴损失1%以下。除铁后液经P204萃取除锰-P507镍钴分离- P204萃镍制备镍、钴产品，萃余后的硫酸锂溶液经浓缩后再进行碳酸钠沉锂。
Abstract:Applying cathode material of spent ternary lithium-ion batteries as raw material, nickel cobalt and lithium in cathode material were effectively recovered through leaching, chemical precipitation, extraction and separation. Firstly, the influence of various factors of H2SO4 and H2O2 system on leaching effect was investigated. The optimum leaching conditions were determined as follows: leaching temperature 90℃, acid/material ratio 2:1, H2O2/material (mL/g) 1.33, liquid/solid ratio (mL/g) 10:1, leaching time 1h. The leaching rate of nickel, cobalt, manganese and lithium could reach more than 99% under these conditions. The leaching solution was neutralized and precipitated with 30% NaOH solution for 2h, the temperature was 90℃, and the terminal pH value was 3.7. After iron removal, the content of iron in the solution was less than 0.005g/L, and the loss of nickel and cobalt was less than 1%. After iron removal, manganese was extracted from the solution by P204, nickel and cobalt were separated by P507 to prepare cobalt products, nickel was extracted by P204 to prepare nickel products, and the remaining lithium sulfate solution was concentrated and then lithium was precipitated by sodium carbonate.
文章编号：20220518001 中图分类号： 文献标志码：
|ZHAO Feng||BGRIMM Technology Groupfirstname.lastname@example.org|
|JIANG Xun-xiong||BGRIMM Technology Groupemail@example.com|
|WANG Sheng-dong||BGRIMM Technology Groupfirstname.lastname@example.org|
|LI Da||BGRIMM Technology Groupemail@example.com|