叶腊石干法研磨微结构变化特征-高校化学工程学报.PDF

第27 卷第2 期 高 校 化 学 工 程 学 报 No.2 Vol.27 2013 年 4 月 Journal of Chemical Engineering of Chinese Universities Apr. 2013 文章编号：1003-9015(2013)02-0344-04 叶腊石干法研磨微结构变化特征 严 俊, 张 俭, 方 伟, 董 楠, 邵佳明, 盛嘉伟 (浙江工业大学 化学工程与材料学院, 浙江 杭州 310014) 摘 要：采用红外光谱﹑场发射扫描电镜及X射线粉晶衍射对叶腊石不同干法研磨条件下微结构变化特征进行研究。 结果表明：研磨过程中，叶腊石微粉粒径逐渐减小，但随着研磨强度进一步加大，粉体颗粒因其表面能的增大而出现 团聚;不同研磨强度下，研磨后粉体的形貌存在明显差异。较大研磨强度下小颗粒粉体因团聚而呈“准球形” 团聚体，且 随着研磨的进行团聚颗粒粒径逐渐增大，低强度下粉体随着研磨时间的延长呈粒径减小行为，而片层状原粉形貌无明 显改变; 在研磨过程中叶腊石粉体红外光谱的变化表现出显著的惰性特征，该矿物中游离态二氧化硅是导致该红外惰 性的直接原因。 关键词：叶腊石；研磨；矿物组成；二氧化硅 中图分类号：P574 文献标识码：A DOI ：10.3969/j.issn.1003-9015.2013.02.028 Microstructural Alteration of Pyrophyllite by Dry Grinding YAN Jun, ZHANG Jian, FANG Wei, DONG Nan, SHAO Jia-ming, SHENG Jia-wei (College of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou 310014, China) Abstract: The effects of grinding on structural alteration of pyrophyllite were followed by infrared spectroscopy, field emission scanning microscopy and X-ray diffraction. The following results were obtained: The mechanical treatment by grinding produces a decrease in the particle size of original pyrophyllite with increasing time. With the increase of grinding intensities, the powder appears re-aggregation due to the high surface energy of active powder particles. The morphologies of pyrophyllite powder are different after grinding under different grinding intensities. The particles gradually have the characteristic of “torispherical” under hig