甲烷磺酸-抗坏血酸体系浸出废旧锂离子电池正极材料中有价金属  

Leaching of Valuable Metals from Cathode Materials of Waste Lithium Ion Batteries in Methanesulfonic Acid-Ascorbic Acid System

作　　者：黄国亮 黄魁 陈章庆 丁思懿 魏琳 董海丽 HUANG Guo-liang;HUANG Kui;CHEN Zhang-qing;DING Si-yi;WEI Lin;DONG Hai-li(School of Resources,Environment and Materials,Guangxi University,Nanning 530004,China)

机构地区：[1]广西大学资源环境与材料学院,南宁530004

出　　处：《有色金属（冶炼部分）》2023年第4期1-7,共7页Nonferrous Metals（Extractive Metallurgy)

基　　金：广西自然科学基金资助项目(2018GXNSFAA281261)。

摘　　要：以甲烷磺酸为浸出剂,抗坏血酸为还原剂和浸出剂,浸出废旧锂离子电池正极材料中的有价金属,探究了甲烷磺酸浓度、抗坏血酸浓度、固液比、反应温度和反应时间对Li、Ni、Co和Mn浸出率的影响。结果表明,在0.6 mol/L甲烷磺酸、0.1 mol/L抗坏血酸、固液比20 g/L、40℃、10 min条件下,Li、Ni、Co和Mn浸出率分别达到99.74%、93.47%、97.16%和96.52%。采用收缩未反应核模型对各金属浸出动力学数据进行拟合,Li、Ni、Co和Mn的表观活化能分别为35.74、48.37、36.81和37.85 kJ/mol,各金属浸出易难程度为Li>Co>Mn>Ni。The valuable metals in waste lithium ion battery cathode materials were leached applying methanesulfonic acid as leaching agent and ascorbic acid as reductant and leaching agent.Effects of methanesulfonic acid concentration,ascorbic acid concentration,ratio of solid to liquid,reaction temperature,and reaction time on leaching rate of Li,Ni,Co and Mn were explored.The results show that the leaching rate of Li,Ni,Co and Mn is 99.74%,93.47%,97.16%and 96.52%respectively under the conditions including methanesulfonic acid concentration of 0.6 mol L,ascorbic acid concentration of 0.1 mol L,ratio of solid to liquid of 20 g L,reaction temperature of 40℃,and reaction time of 10 min.The shrinkage unreacted core model was used to fit the kinetic data of metal leaching.The apparent activation energy of Li,Ni,Co and Mn is 35.74,48.37,36.81,and 37.85 kJ mol,respectively.The degree of metal leaching is Li>Co>Mn>Ni.

关 键 词：废旧锂离子电池 甲烷磺酸 抗坏血酸 浸出动力学 Li Ni Co MN 

分 类 号：TF803.2[冶金工程—有色金属冶金]