摘要
随着电池行业的快速发展,电池级碳酸锂的市场需求越来越大。以某公司生产电池的含锂工业废料为原料,采用碳化分解法对其进行提纯除杂,并进行多次滤液滤饼循环,最终得到符合电池级碳酸锂行业标准的产品。碳化过程优化反应条件:固液质量体积比(g/mL)为1∶50,搅拌转速为300 r/min,二氧化碳流速为10 L/min,反应温度为20℃,反应时间为60 min。热分解过程优化反应条件:搅拌转速为300 r/min,反应温度为95℃,反应时间为60 min。将碳化分解制备的碳酸锂滤饼和滤液进行5次循环反应,即可得到符合电池级碳酸锂行业标准的产品。所得碳酸锂产品纯度达到99.71%,而且其中镁、钙、钾质量分数分别降低至0.005 3%、0.005 0%、0.000 9%,产品收率保持在55%以上,产品形貌呈棒状、大小均匀、分散性良好。
The market demand for battery-grade lithium carbonate is increasing with the rapid development of the battery industry.The lithium-containing industrial waste from a company was used as raw material,and it was purified by carbonization decomposition method,and the filtrate filter cake cycle was repeated,and finally the battery-grade lithium carbonate meeting the requirement of the industry standard was obtained.The reaction conditions of the carbonization process was as follows:the solid-liquid mass-volume ratio was 1:50,the stirring speed was 300 r/min,the CO2 flow rate was 10 L/min,the reaction temperature was 20℃and the reaction time was 60 min.The reaction conditions of the thermal decomposition process was as follows:the stirring speed was 300 r/min,the reaction temperature was 95℃and the reaction time was 60 min.After a fivestage filtrate cake cycle for the Li2CO3 obtained by the carbonization-and decomposition-processes,the final purified Li2CO3 product can fully meets the requirement of battery-grade lithium carbonate industry standard.The content of Li2CO3 in the product was 99.71%,the mass fractions of Mg,Ca and K were reduced to 0.005 3%,0.005 0%and 0.000 9%,respectively.The yield was maintained above 55%,and the product had a rod shape,uniform size and good dispersion.
作者
胡敏
龚翰章
吴华东
郭嘉
张林锋
周玉新
Hu Min;Gong Hanzhang;Wu Huadong;Guo Jia;Zhang Linfeng;Zhou Yuxin(Key Laboratory for Green Chemical Process of Ministry of Education,Wuhan Institute of Technology,Wuhan 430073,China)
出处
《无机盐工业》
CAS
CSCD
北大核心
2020年第3期80-84,共5页
Inorganic Chemicals Industry
基金
国家自然科学基金项目（No.21503152）
武汉工程大学科学研究基金项目（K201640,K201760）
关键词
电池级碳酸锂
碳化反应
热分解反应
提纯
battery-grade lithium carbonate
carbonization reaction
thermal decomposition reaction
purification
作者简介
胡敏(1996-),女,硕士研究生,化学工程专业,E-mail:735477538@qq.com。
