摘要
研究了采用H_(2)SO_(4)+H_(2)O_(2)浸出体系从废旧磷酸铁锂电池粉中选择性回收锂,考察了硫酸用量、温度、浸出时间和H_(2)O_(2)用量对Li、Fe、P浸出率的影响。结果表明:在90℃下浸出60 min,控制硫酸和H_(2)O_(2)用量分别为理论量的1.2倍和3倍,Li浸出率可达99.87%,Fe、P浸出率均仅为0.45%,锂的选择性浸出效果较好;浸出反应过程符合未反应收缩核模型,反应表观活化能为11.7539 kJ/mol,表明浸出过程受产物层扩散控制。
The leaching of lithium from lithium iron phosphate battery powder using H_(2)SO_(4)+H_(2)O_(2) system was studied.The effects of H_(2)SO_(4) dosage,temperature,leaching time and H_(2)O_(2) dosage on leaching of Li,Fe and P were examined.The results show that under the conditions of temperature of 90℃,leaching time of 60 min,H_(2)SO_(4) dosage of 1.2 times theoretical amount,and H_(2)O_(2) dosage of 3 times theoretical amount,leaching rate of Li is 99.87%and leaching rate of Fe and P are only 0.45%,and the selective leaching effect of lithium is better.The leaching reaction conforms to the unreacted shrinkage nuclear model,the reaction apparent activation energy is 11.7539 kJ/mol,indicating that the leaching process is controlled by diffusion of product layer.
作者
段金亮
阮丁山
陈若葵
乔延超
DUAN Jinliang;RUAN Dingshan;CHEN Ruokui;QIAO Yanchao(Guangdong Brunp Recycling Technology Co.,Ltd.,Foshan 528137,China;Guangdong Provincial Key Laboratory of Battery Recycling and Reuse,Foshan 528137,China;Hunan Brunp Recycling Technology Co.,Ltd.,Changsha 410600,China)
出处
《湿法冶金》
CAS
北大核心
2022年第6期518-522,共5页
Hydrometallurgy of China
基金
国家重点研发计划项目(2018YFC1901801)
广东省电池循环利用企业重点实验室计划项目(2021年度)(2021B1212050002)
湖南省高新技术产业科技创新引领计划项目(2020GK4050)。
关键词
磷酸铁锂电池粉
硫酸
过氧化氢
锂
浸出
lithium iron phosphate battery powder
H_(2)SO_(4)
H_(2)O_(2)
lithium
leaching
