碳还原焙烧—水浸法处理废旧三元锂离子正极材料  

Treatment of Waste Ternary Lithium Ion Cathode Materials by Carbon Reduction Roasting-Water Leaching Method

作　　者：周文隽 蒋训雄[1,2] ZHOU Wen-jun;JIANG Xun-xiong(Beijing General Research Institute of Mining and Metallurgy,Beijing 100160,China;BGRIMM Technology Group,Beijing 100160,China)

机构地区：[1]北京矿冶研究总院,北京100160 [2]矿冶科技集团有限公司,北京100160

出　　处：《有色金属（冶炼部分）》2023年第8期25-31,共7页Nonferrous Metals（Extractive Metallurgy)

基　　金：矿冶科技集团有限公司基金资助项目(02-19JYYJ-1)。

摘　　要：采用碳还原焙烧—水浸法从废旧三元锂离子正极材料中优先选择性提Li,通过热力学分析,结合XRD、ICP等检测手段,研究了焙烧温度、焙烧时间、配碳量对Li浸出率的影响。结果表明,可以通过碳还原焙烧—水浸法优先提取三元锂离子正极材料中的Li,焙砂中Li以Li_(2)CO_(3)形式存在,在焙烧温度750℃、焙烧时间1 h,配碳量20%的条件下,Li浸出率达到97.85%,实现了优先选择性提Li。The method of carbon reduction roasting-water leaching was used for selective extraction of Li from waste ternary Li-ion cathode materials.Through thermodynamic analysis,combined with XRD,ICP and other detection means,the effects of roasting temperature,roasting time and carbon content on Li leaching rate were studied.The results show that Li in ternary Li-ion anode material could be preferentially extracted by carbon reduction roasting-water leaching method.Li in calcine exists as Li_(2)CO_(3).The leaching rate of Li is 97.85%under the conditions including roasting temperature of 750℃,roasting time of 1 h,and carbon dosage of 20%,and the preferential selective extraction of Li is achieved.

关 键 词：废旧三元锂离子电池 三元正极黑粉 碳还原焙烧 水浸 锂 

分 类 号：X758[环境科学与工程—环境工程]