摘要
本研究旨在探讨湿法冶金中,利用生物质材料甘蔗渣替代双氧水作还原剂浸出废旧锂离子电池中的有价金属,通过改变柠檬酸的浓度、甘蔗渣的质量分数、反应温度、超声时长、固液比等变量,探索最佳浸出条件,通过X射线粉末衍射、红外光谱分析、电感耦合等离子光谱分析等检测方法测定甘蔗渣、废旧锂离子电池正极材料结构的变化以及有价金属的浸出浓度。研究发现对于废旧钴酸锂电池,柠檬酸浓度为2.5mol/L,固液比为25g/L,反应温度为80℃,超声时间为6h,甘蔗渣质量分数为0.4%,加热方式为恒温超声,钴的浸出率可达99.0%,锂的浸出率为94.9%,此湿法提取废旧锂离子电池中的有价金属比火法和常用的湿法成本要低很多,是一种可推广回收废旧锂离子有价金属的方法。
This study aims to explore the use of biomass material bagasse instead of hydrogen peroxide as a reducing agent to leach valuable metals from spent lithium-ion batteries.By changing variables such as the concentration of citric acid,the mass fraction of bagasse,reaction temperature,ultrasonic duration,and solidliquid ratio,the optimal leaching conditions are explored.The structural changes of bagasse and cathode materials of spent lithium-ion batteries,as well as the leaching concentration of valuable metals,were determined by detection methods such as X-ray powder diffraction,infrared spectroscopy analysis,and inductively coupled plasma spectroscopy analysis.The study found that for spent cobaltate lithium batteries,with a citric acid concentration of 2.5 mol/L,a solidliquid ratio of 25 g/L,a reaction temperature of 80°C,an ultrasonic duration of 6 hours,a sugarcane bagasse mass fraction of O.4%,and a heating method of constant temperature ultrasonic,the leaching rate of cobalt can reach 99.0%,and the leaching rate of lithium can reach 94.9%.This wet extraction method for valuable metals from spent lithium-ion batteries is significantly less expensive than pyrometallurgy and commonly used wet methods,making it a promising approach for the recovery of valuable metals from spent lithium-ion batteries.
作者
宋丹丹
薛卫捷
吴晨阳
朱雅琴
SONG Dandan;XUE Weijie;WU Chenyang;ZHU Yaqin(Yueyang Vocational Technical College,Yueyang,Hunan 414000;Hunan Hongyue New Energy Recycling Technology Co,Ld,Yueyang,Hunan 414000)
出处
《岳阳职业技术学院学报》
2025年第6期77-81,共5页
Journal of Yueyang Vocational and Technical College
基金
2023年度湖南省教育厅科学研究优秀青年项目“生物质材料浸出锂离子电池正极材料有价金属回收的研究”(23B1099)。
关键词
甘蔗渣
锂离子电池
有价金属回收
湿法回收
bagasse
lithium-ion battery
recovery of valuable metal
hydrometallurgical recovery
