含锂废铝电解质提锂过程浸出行为研究  

Study on Leaching Behavior of Waste Aluminum Electrolyte Containing Lithium during Extraction of Lithium

作　　者：刘风琴 王艺 谢明壮 吴泽港 于国庆 钟晶晶 赵洪亮[1] LIU Fengqin;WANG Yi;XIE Mingzhuang;WU Zegang;YU Guoqing;ZHONG Jingjing;ZHAO Hongliang(School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083

出　　处：《有色金属(冶炼部分)》2025年第2期77-85,共9页Nonferrous Metals(Extractive Metallurgy)

基　　金：国家自然科学基金面上项目(52274346);中国博士后科学基金第73批面上项目(2023M730229)。

摘　　要：通过改变盐酸浓度、反应温度、浸出时间和液固比等浸出参数,研究了含锂废铝电解质中锂(Li)、钠(Na)、铝(Al)、钙(Ca)四种元素的盐酸浸出行为。研究发现,随着盐酸浓度的增大,Li和Na的浸出率均有所提高,Al和Ca的浸出率很低且随盐酸浓度变化不大。随着浸出时间的延长,Li的浸出率呈现先升高又降低的趋势,而Na的浸出率一直升高,Al和Ca浸出率较低但随浸出时间延长而增长。随着浸出温度的升高,Li的浸出率呈现先升高又降低的趋势,温度的改变对Na、Al和Ca的浸出率影响不大。Li的浸出率随液固比增大先快速升高然后到达拐点趋于平稳,Na、Al和Ca的浸出率随液固比的增大增长较为明显。通过改变和优化浸出参数,锂浸出率最高可达98%。The leaching behavior of lithium(Li),sodium(Na),aluminum(Al)and calcium(Ca)in waste aluminum electrolyte containing lithium was studied by changing the concentration of hydrochloric acid,reaction temperature,leaching time and liquid-solid ratio.The results show that the leaching rates of Li and Na rise with the increase of concentration of hydrochloric acid,while the leaching rates of Al and Ca are very low and do not change much with the concentration of hydrochloric acid.The leaching rate of Li first increases and then decreases with the increase of leaching time,the leaching rate of Na rises with the increase time,and the leaching rates of Al and Ca are low but rise with the increase of leaching time.The leaching rate of Li first increases and then decreases,while the change of temperature has little effect on the leaching rates of Na,Al and Ca.The leaching rate of Li first increases rapidly with the increase of liquid-solid ratio and then reaches the inflection point and tends to be stable,while the leaching rates of Na,Al and Ca rise significantly with the increase of liquid-solid ratio.By changing and optimizing the leaching parameters,the leaching rate of lithium can reach 98%.

关 键 词：含锂废铝电解质 浸出率 盐酸浸出 浸出行为 LI NA Al Ca 

分 类 号：TF821[冶金工程—有色金属冶金] TF826.3