废旧磷酸铁锂正极粉锂的选择性浸出工艺研究  

Selective Leaching Process of Waste Lithium Iron Phosphate Cathode Powder

作　　者：王威[1] 柳林[1] 刘红召[1] 王洪亮[1] 曹耀华[1] 马驰[1] Wang Wei;Liu Lin;Liu Hongzhao;Wang Hongliang;Cao Yaohua;Ma Chi(Zhengzhou Institute of Multipurpose Utilization of Mineral Resources,China National Engineering Research Center for Utilization of Industrial Minerals,Key Laboratory for Polymetallic Ores’Evaluation and Utilization,MNR,Comprehensive Utilization Key Laboratory of Gold Resource in Henan Province,Zhengzhou,Henan,China)

机构地区：[1]中国地质科学院郑州矿产综合利用研究所,国家非金属矿资源综合利用工程技术研究中心,自然资源部多金属矿综合利用评价重点实验室,河南省黄金资源综合利用重点实验室,河南郑州450006

出　　处：《矿产综合利用》2023年第5期53-57,共5页Multipurpose Utilization of Mineral Resources

基　　金：中国地质调查局地质大调查项目(DD20221698)。

摘　　要：这是一篇冶金工程领域的论文。以废旧磷酸铁锂电池正极粉为对象,开展了以Na_(2)S_(2)O_(8)作为氧化剂,并添加低浓度乙酸作为浸出剂选择性浸锂的研究,考查了Na_(2)S_(2)O_(8)加入量、乙酸浓度、浸出温度、浸出液固比和浸出时间等对锂选择性浸出影响。在乙酸浓度0.3 mol/L、Na_(2)S_(2)O_(8)加入量为理论量的1.1倍,浸出液固比10 mL/g、室温浸出2 h条件下,锂、铁、磷的浸出率分别为98.05%、4.49%和2.46%。This is an essay in the field of metallurgical engineering.Using waste lithium iron phosphate battery cathode powder as raw material,a study on lithium selective leaching with Na_(2)S_(2)O_(8) as oxidant and low concentration acetic acid as aleaching agent was carried out.The effects of Na_(2)S_(2)O_(8) addition,acetic acid concentration,leaching temperature,leaching liquid-solid ratio and leaching time on selective leaching of lithium were investigated.At the conditions of acetic acid concentration of 0.3 mol/L,Na_(2)S_(2)O_(8) addition of 1.1 times the theoretical amount,L/S ratio of 10 mL/g and room temperature leaching for 2 h,the leaching rates of lithium,iron and phosphorus were 98.05%,4.49%and 2.46%respectively.

关 键 词：冶金工程 磷酸铁锂电池 选择性浸锂 过硫酸钠 乙酸 

分 类 号：TD985[矿业工程—选矿] TF843[冶金工程—有色金属冶金]