气流破碎在高纯碳酸锂粉末粒径优化中的应用

doi:10.16085/j.issn.1000-6613.2018-0423

化工进展 ›› 2018, Vol. 37 ›› Issue (11): 4162-4167.DOI: 10.16085/j.issn.1000-6613.2018-0423

气流破碎在高纯碳酸锂粉末粒径优化中的应用

刘骥飞¹, 戴剑锋¹, 贾钰泽², 袁扬²

1 兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室, 甘肃兰州 730050;
2 国家镍钴新材料工程技术研究中心, 甘肃兰州 730010

收稿日期:2018-03-05 修回日期:2018-07-25 出版日期:2018-11-05 发布日期:2018-11-05
通讯作者: 戴剑锋,教授,博士生导师,研究方向为纳米储能和磁性材料。E-mail:daijf@lut.cn。
作者简介:刘骥飞(1990-),男,博士研究生,研究方向为储能材料先进结构研究。
基金资助:
国家自然科学基金项目（11664023）。

Jet milling in optimization of particle size of high purity lithium carbonate

LIU Jifei¹, DAI Jianfeng¹, JIA Yuze², YUAN Yang²

1 State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou 730050, Gansu, China;
2 National Nickel and Cobalt Advanced Materials Engineering Research Center, Lanzhou 730010, Gansu, China

Received:2018-03-05 Revised:2018-07-25 Online:2018-11-05 Published:2018-11-05

摘要/Abstract

摘要： 通过气流破碎优化经碳化-离子交换-热解辅以高温干燥工艺制备的高纯碳酸锂粉体材料的粒径分布，研究发现气流破碎系统的喂料阀频率、分级轮和引风机频率变化对物料的粒径分布有重要影响。对4种不同粒度的样品共计18组实验分析各因素对物料粒径的影响，当设置喂料阀频率25～28Hz、分级轮频率30～35Hz、引风机频率35～40Hz时破碎效果最佳，该工作参数对于样品初始粒径在5μm≤d₁₀≤14μm、20μm≤d₅₀≤50μm、70μm≤d₅₀≤110μm范围的碳酸锂颗粒粒径优化控制具有普适性。合理的气流破碎参数设置不仅使高纯碳酸锂物料具有良好的分散性和较规则的形貌，而且经等离子耦合激光光谱仪（ICP）检测证明气流破碎后不会引起高纯碳酸锂磁性异物和杂质含量的增加。这一研究对优化粉体材料形貌、实现特定粒度材料制备具有一定意义。

关键词: 气流破碎, 热解, 频率, 粒度分布, 优化

Abstract: High purity lithium carbonate has been prepared by carbonization, ion exchange, control pyrolysis and high-temperature drying process. It has optimized particle size distribution by bringing in a jet milling process. It was found that the frequency of feeding machine, the grading wheel and induced fan has an important influence on the distribution of material particle size. A total of 18 groups of experiments were conducted on 4 samples with different granularities to analyze the optimal control technology of material particle size by various influencing factors. The results indicated the milling was optimal when the frequency of feeding machine, the grading wheel and induced fan reached 25-28Hz, 30-35Hz and 35-40Hz, respectively. This proposed parameter has general applicability to the particle size of materials within the range 5μm ≤ d₁₀ ≤ 14μm, 20μm ≤ d₅₀ ≤ 50μm, 70μm ≤ d₅₀ ≤ 110μm. In addition,by the help of these suitable jet milling parameters setting technologies, high purity lithium carbonate not only has good dispersion and regular appearance, but also the magnetic foreign bodies and impurities make no difference whether milling or not. The study has guiding significance for optimizing the shape of powder materials and realizing the preparation of specific particle size materials.

Key words: jet milling, pyrolysis, frequency, particle size distribution, optimization

中图分类号:

TM911

刘骥飞, 戴剑锋, 贾钰泽, 袁扬. 气流破碎在高纯碳酸锂粉末粒径优化中的应用[J]. 化工进展, 2018, 37(11): 4162-4167.

LIU Jifei, DAI Jianfeng, JIA Yuze, YUAN Yang. Jet milling in optimization of particle size of high purity lithium carbonate[J]. Chemical Industry and Engineering Progress, 2018, 37(11): 4162-4167.

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气流破碎在高纯碳酸锂粉末粒径优化中的应用

Jet milling in optimization of particle size of high purity lithium carbonate

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