摘要
以抗坏血酸和葡萄糖酸混合酸为浸出体系,辅以微波加热技术从废旧三元锂电池正极材料中浸出有价金属。采用N-N,二甲基吡咯烷酮(NMP)对废旧三元锂电池正极材料进行预处理。单因素试验确定的最佳条件为:微波温度90℃、微波反应时间6 min、抗坏血酸浓度0.5 mol/L、葡萄糖酸浓度1 mol/L、固液比20 g/L,获得对应Mn、Co、Ni、Li的浸出率分别是99.5%、98.7%、99.7%、97.8%。与传统浸出法相比较,微波辅助浸出效率更高。
Using mixed acid ascorbic acid and gluconic acid as the leaching system,supplemented with microwave heating technology to leach valuable metals from used ternary lithium battery cathode materials.N-N,dimethylpyrrolidone(NMP)was used to pretreat the used ternary lithium battery cathode material.The optimum conditions were determined by a single-factor test to be a microwave temperature of 90℃,a microwave reaction time of 6 min,an ascorbic acid concentration of 0.5 mol/L,a gluconic acid concentration of 1 mol/L and a solid-liquid ratio of 20 g/L.The optimum leaching rates for Mn,Co,Ni and Li were obtained as follows 99.5%,98.7%,99.7%and 97.8%,respectively,and the solid residues after leaching were characterized via XRD,SEM and XPS for the anode materials and different conditions.Higher efficiency of microwave assisted leaching compared to traditional leaching methods.
作者
白雪莲
邓文叶
刘育育
薛燕
赵鹏君
常爱民
谢永新
BAI Xuelian;DENG Wenye;LIU Yuyu;XUE Yan;ZHAO Pengjun;CHANG Aimin;XIE Yongxin(College of Resources and Environment,Xinjiang Agricultural University,Urumqi 830052,China;School of Chemical and Environmental Engineering,Xinjiang Engineering College,Urumqi 830091,China;Key Laboratory of Electronic Information Materials and Devices,Xinjiang Institute of Physical and Chemical Technology,Chinese Academy of Sciences,Urumqi 830011,China)
出处
《有色金属工程》
CAS
北大核心
2023年第9期79-83,共5页
Nonferrous Metals Engineering
基金
新疆“天山英才”培养计划项目(2022TSYCCX0009)
新疆维吾尔自治区重点研发计划项目(2021B01001-4)。
关键词
废旧三元锂电池
有价金属
微波加热技术
混合酸
浸出率
waste ternary lithium battery
valuable metals
microwave heating technology
mixed acid
leaching rate
