废旧锰酸锂电池正极粉中锰的浸出  

Manganese Leaching from Cathode Powder of Spent Lithium Manganite Battery

作　　者：鲁俊雀 王杜 刘勇奇 吕志斌 LU Jun-que;WANG Du;LIU Yong-qi;LYU Zhi-bin(Hunan Brunp Recycling Technology Co.,Ltd.,Changsha 410604,China;Guangdong Provincial Key Laboratory of Battery Recycling,Foshan 528000,Guangdong,China)

机构地区：[1]湖南邦普循环科技有限公司,长沙410604 [2]广东省电池循环利用企业重点实验室,广东佛山528000

出　　处：《有色金属（冶炼部分）》2022年第6期11-15,共5页Nonferrous Metals（Extractive Metallurgy)

基　　金：湖南省科技创新计划项目(2021RC4068)。

摘　　要：废旧锰酸锂电池中含有大量的锰、锂等有价金属元素,具有非常高的经济回收价值。以硫酸作为浸出剂,研究了酸料比、还原剂种类、还原剂加入量、反应温度及反应时间对锰浸出率的影响。结果表明,在酸料比为2.5、浸出温度60℃、还原剂与原料比为1∶1,硫代硫酸钠为还原剂,反应时间1 h时,锰浸出率为94.01%;以过氧化氢为还原剂、反应0.5 h时,锰浸出率为99.91%。最终确定了硫代硫酸钠∶过氧化氢=8∶2作为联合还原剂,锰浸出率高达99.99%。Spent lithium manganite battery contains a large amount of valuable metal elements of manganese and lithium with high economic recycling value.Applying sulfuric acid as leaching reagents to investigate effects of mass ratio of sulfuric acid to raw material,type of reducing agent,amount of reducing agent,reaction temperature,and reaction time on manganese leaching rate.The results show that manganese leaching rate is 94.01%under the conditions including ratio of sulfuric acid to raw material of 2.5,leaching temperature of 60℃,ratio of reducing agent to raw material of 1∶1,sodium thiosulfate as reducing agent,and reaction time of 1 h.When reacting time is 0.5 h and hydrogen peroxide is used as reducing agent,the leaching rate of manganese is 99.91%.Manganese leaching rate is up to 99.99%when sodium thiosulfate∶hydrogen peroxide=8∶2 is determined as the combined reducing agent.

关 键 词：废旧锂离子电池 锰酸锂 浸出 锰 硫代硫酸钠 过氧化氢 

分 类 号：TF803.21[冶金工程—有色金属冶金]