LI Kangli,TENG Yanhua,XU Fei,WANG Kerui,CHENG Changhong,XUE Changguo
(School of Materials Science and Engineering,Anhui University of Science and Technology,Huainan 232001,China)
Abstract:Ultrafine powder was prepared from coal gasification fine slag from 7 regions.The effects of ball milling time on particle size and specific surface area,microstructure and phase composition of ultrafine powder were studied.The compatibility of ultrafine powder in water,n-hexane and acetone was also discussed.The results show that the particle size of ultrafine powder obtained by ball milling from 1 h to 3 h changes obviously,and the particle size changes gradually to about from 2 μm to 3 μm within from 3 h to 4 h.With the decrease of particle size,the specific surface area of ultrafine powder increases gradually.After milling for 4 h,the specific surface area of ultrafine powder prepared from most coal gasification fine slag samples can reach 890 m2/kg.With the prolongation of ball milling time,the particle size of fine slag becomes smaller and more spherical particles become irregular and angular particles.The crystal phase intensity of ultrafine powder decreases,the diffraction peak width increases and it has higher reactivity.The compatibility of ultrafine powder in water phase,n-hexane phase and acetone phase is different,which is caused by the difference of Zeta potential,specific surface area,porosity of porous structure between particles and activity of ultrafine powder.
Keywords:coal gasification fine slag;ultrafine powder;particle size distribution;compatibility
中图分类号： TB321 文献标志码：A
文章编号：1008-5548(2022)04-0100-09
DOI:10.13732/j.issn.1008-5548.2022.04.011
收稿日期： 2022-03-15， 修回日期：2022-05-18，在线出版时间：2022-06-23。
基金项目：安徽省杰出青年科学基金项目，编号：1808085J30。
第一作者简介：李康礼(1998—)，男，硕士研究生，研究方向为煤气化灰渣高值化利用设计与功能高聚物的研发。E-mail：2021201021@aust.edu.cn。
通信作者简介：滕艳华(1977—)，女，副教授，硕士，硕士生导师，研究方向为煤气化灰渣高值化利用设计与功能高聚物的研发。E-mail：tyhqqhr@126.com。
