LIU Yingli, ZHU Wenchao, ZOU Zhiyun, LI Cong, CHANG Ying

(Academy of Military Sciences，Institute of Chemical Defense, Beijing 102205，China)

Abstract:This paper aims to investigate the agglomeration degree of four powder materials which are currently used in practice. The experiment of powder agglomeration based on different dispersion pressure was carnied out by laser diffrac- tion and partiele size distribution test, and the characteristic index of powder agglomeration was established through the experimental study. The experimental results show that the higher the value of agglomeration characteristic indexis,the stronger the agglomeration of powderis, and the closer to 1 the value of agglomeration characteristic index, the weaker the agglomeration of powder. A particle size of about 5 um is dividing line for the agglomeration of the four powders. Particles less than 5m is easily agglomerated, and particles larger than 5m is not easy to agglomerat. The agglomeration from weak to strong of four powders is A <B<C<D,and it is consistent with the order of powder fluidity. According to the agglomeration characteristic index of the powder sample, the powder product which meets the application requirement is sSleCled perineny.Ihe index0f0nCralioncliactenisliCscOuld 0videluther referenCe 1or1he selectionafsubs quent powder aplication. The agglomeration characteristic index and characterization method were established, and the purpose of rapid, simple and accurate characterization of superfine powder agglomeration was realized.

Keywords:ultrafine powder; dispersion pressure; agglomeration; characterization

文章编号：1008-5548(2020)06-0045-06

DOI:10.13732/j.issn.1008-5548.2020.06.006

收稿日期： 2020-05-26， 修回日期：2020-07-03，在线出版时间：2020-09-11 07:16。

第一作者简介：刘英莉(1974—)，女，硕士，研究方向为分析化学、环境工程。E-mail：liuyinl@sohu.com。

通信作者简介：常颖(1971—)，女(满族)，博士，高级工程师，硕士生导师，研究方向为粉体工程、机械工程。E-mail：chying01@sina.com。

中图分类号：TB383                               文献标志码：A