ZOU Hongsheng¹， TANG Kaijing²， YANG Fei¹， ZENG Bo¹， CHEN Sijie¹， CHEN Haiyan¹

(1. School of Environment and Resource, Southwest University of Science and Technology, Mianyang 621010，China;2. Department of Materials Engineering, Mianyang Vocational and Technical College, Mianyang 621000, China)

Abstract: Taking coal-fired power plant fly ash as the research object, the fly ash was pulverized by ball milling process and steam jet milling process, and a more comprehensive comparative study of the particle size distribution, mineral composition, particle morphology, Zeta potential and 28 d activity index of the powder particles was carried out. The results show that the particle size distribution of ultra-fine fly ash prepared by steam jet mill is uniform, and its activity index is significantly higher than that of ultra-fine fly ash prepared by ball mill. The activity of fly ash increases significantly with the decreasing of its particle size. In the condition of 30% of ultrafine fly ash and D50=5.14 μm, its activity index can reach 104.5%.

Keywords:fly ash; ball mill; steam jet mill; activity index

中图分类号：TK09

文献标志码：A

文章编号：1008-5548(2021)02-0047-07

DOI:10.13732/j.issn.1008-5548.2021.02.007

收稿日期： 2020-09-26， 修回日期：2020-11-06，在线出版时间：2020-12-22 16:22。

基金项目：四川省教育厅自然科学基金项目，编号：18ZA0498；四川省应用基础研究基金项目，编号：2018JY0438。

第一作者简介：邹红生(1996—)，男，硕士研究生，研究方向为固体废弃物的资源化利用。E-mail：374126025@qq.com。

通信作者简介：陈海焱(1964—)，男，博士，教授，博士生导师，研究方向为气流粉碎、气流分级与通风除尘技术。E-mail：chenhai-yan@163.com。