| 含锂工业废料制备电池级碳酸锂工艺研究 |
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| 引用本文： | 胡敏,龚翰章,吴华东,郭嘉,张林锋,周玉新.含锂工业废料制备电池级碳酸锂工艺研究[J].无机盐工业,2020,52(3):80-84. |
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| 作者姓名： | 胡敏 龚翰章 吴华东 郭嘉 张林锋 周玉新 |
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| 作者单位： | 武汉工程大学化工与制药学院,绿色化工过程教育部重点实验室,湖北武汉 430073 |
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| 基金项目： | 国家自然科学基金项目(21503152);武汉工程大学科学研究基金项目(K201640);武汉工程大学科学研究基金项目(K201760) |
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| 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。
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| 关 键 词： | 电池级碳酸锂 碳化反应 热分解反应 提纯 |
| 收稿时间： | 2019-09-22 |
Preparation of battery-grade lithium carbonate from lithium-containing industrial waste |
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| Hu Min,Gong Hanzhang,Wu Huadong,Guo Jia,Zhang Linfeng,Zhou Yuxin.Preparation of battery-grade lithium carbonate from lithium-containing industrial waste[J].Inorganic Chemicals Industry,2020,52(3):80-84. |
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| Authors: | Hu Min Gong Hanzhang Wu Huadong Guo Jia Zhang Linfeng Zhou Yuxin |
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| Affiliation: | Key Laboratory for Green Chemical Process of Ministry of Education,Wuhan Institute of Technology,Wuhan 430073,China |
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| Abstract: | 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 tem-perature 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 five-stage 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. |
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| Keywords: | battery-grade lithium carbonate carbonization reaction thermal decomposition reaction purification |
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