粉体流动性的静力学及动力学表征研究  

Study on statics and kinetics characterization of powder flowability

作　　者：罗聪 陆海峰[1] 郭晓镭[1] 龚欣[1] 曹嘉琨 薛连昊 谈斌喆 Luo Cong;Lu Haifeng;Guo Xiaolei;Gong Xin;Cao Jiakun;Xue Lianhao;Tan Binzhe(Shanghai Research Center of Gasification Technology,East China University of Science and Technology,Shanghai 200237)

机构地区：[1]华东理工大学上海市煤气化工程技术研究中心,上海200237

出　　处：《化工新型材料》2020年第10期186-191,共6页New Chemical Materials

基　　金：国家重点研发计划(2018YFC0808500);国家自然科学基金(51876066)。

摘　　要：以煤矿、冶金、橡胶等行业常见的粉体(铜粉、玻璃微珠、煤粉、氧化铝、石油焦及炭黑)为研究对象,借助静力学和动力学方法,进行粉体流动性表征。通过表征得到粉体物性参数与流动性参数之间的函数关系,发现粉体物性(粒径和密度)对摩擦特性、压缩特性、动力学特性等流动性参数的影响规律不同。构建了不同流动性参数间的关联式,获得了休止角与豪斯纳指数(HR)、HR与压缩性指数的线性关系。对比了Carr指数与Jenike流动函数的结果,发现静力学表征技术能更有效地区分流动性较的好粉体之间的差异,而对于粘性粉体通过剪切测试易获得更全面的特性表征。Common powders in coal mine,metallurgy,rubber and other industries(copper,glass bead,coal,alumina,petroleum coke and carbon black)were selected as the research objects,the powder flowability were fully characterized by means of statics and kinetics.The functional relationship between the physical properties and the flowability parameters of the powders was obtained.The different properties of the powders such as friction,compression and kinetic properties were affected by the particle size and density differently.The correlation between different flow parameters was constructed,and the linear relationship between the angle of repose and the Hausner ratio(HR)was obtained,as well as the linear relationship between HR and compressibility index.The results of Carr\s index and Jenike\s flow function shown that the static characterization technique can more effectively distinguish the difference between powders with better flowability,while for adhesive powder,it was easy to obtain more comprehensive characterization through shear test.

关 键 词：粉体 流动性 密度 粒径 

分 类 号：TQ531[化学工程—煤化学工程]