CHEN Wanting1 , DING Hao2 , CAO Li2 , LUO Qin2 , CUI Chenglin2
(1. School of Mining Engineering, University of Science and Technology Liaoning, Anshan 114051, China; 2. School of Materials Science and Technology, China University of Geosciences (Beijing), Beijing 100083, China)
Abstract： To reduce the size of silica particles formed aggregates by interaction among the hydroxyl groups in particle surface and make the silica keep a good dispersion state, the disaggregation and dispersion of silica particles in aqueous medium were researched by the method of mechanical grinding. The results show that the median diameter d50 of silica particles reduces from 18.434 to 3.8 μm by wet grinding. The factors influence the particle size of silica after wet grinding are the mass ratio of grinding media to materials, solid content in slurry, milling time and dosage of dispersants. The dispersion of silica is remarkably increased after wet grinding than before. The method of mechanical grinding realize the disaggregation and dispersion in aqueous medium.
Keywords: silica; disaggregation; dispersion; grinding
中图分类号：TQ330.38+1 文献标志码：A
文章编号：1008-5548(2015)03-0051-05
DOI:10.13732/j.issn.1008-5548.2015.03.012
收稿日期：2014-10-20， 修回日期：2014-11-03，在线出版时间：2015-06-24。
第一作者简介：陈婉婷（1989—），女，硕士研究生，研究方向为矿物加工工程。 电话：18810249731，E-mail ：1002401575@qq.com。
通信作者简介：丁浩（1964—），男，博士，教授，博士生导师，研究方向为无机矿物材料、环境材料、非金属矿选矿与深加工、粉体材料等。 电话：010-82322982，E-mail ：dinghao@cugb.edu.cn。
