【作者】 任晓川； 詹路； 陈超； Zahoor Ahmad；

【Author】 Ren Xiaochuan;Zhan Lu;Chen Chao;Zahoor Ahmad;School of Ecological and Environmental Sciences,East China Normal University;Shanghai Key Laboratory of Urban Ecological Process and Ecological Restoration;

【机构】 华东师范大学生态与环境科学学院； 上海城市生态过程与生态恢复重点实验室；

【摘要】 废旧锂电池正极材料中含有大量的有价金属元素,回收其中的金属元素具有很高的环保意义和经济意义。研究表明,锰酸锂型电池稳定性高,在常温常压下难以得到高效的浸出。采用高温高压水热法浸出其中的金属元素。结果表明,在柠檬酸体系下,锰酸锂中锰的浸出最高达到68%。在磷酸体系下,当磷酸的浓度1.5 mol/L,反应温度为150℃,反应时间为80 min,固液比为30 g/L,还原剂H₂O₂为4%时,锰的浸出率能达到99%。对两种体系进行动力学模型拟合,拟合结果表明,两种体系均符合化学反应控制模型,活化能分别为19.04,14.88 k J/mol。实现了锰酸锂型电池中有价金属的有效浸出,为废旧电池绿色环保回收提供了一种新思路。更多还原

【Abstract】 The waste lithium battery cathode material contains a large amount of valuable elements such as manganese.Recycling manganese element has environmental protection and economic significance. Because of its high stability,lithium manganese batteries are difficult to leach efficiently at room temperature and pressure. Therefore,an innovative method is provided in this experiment to leach manganese element by high temperature and high pressure hydrothermal method. The result shows that the recycling of manganese in lithium manganese can only achieve 68% in citric acid system. And in the phosphoric acid system,the leaching rate of manganese can reach 99%,when acid concentration is 1. 5 mol/L,reaction temperature is 150 ℃,reaction time is 80 min,the rate of solid to liquid ratio is 30 g/L,and hydrogen peroxide content is4%. The kinetics of the two systems conforms to the chemical reaction control model,and the activation energy is 19. 04 k J/mol. Effective leaching of valuable metal in lithium manganese batteries has been achieved,which provides a new idea for green and environmental protection recovery of waste batteries.更多还原