Effect of different milling processes on the mineral distribution in a coal powder

作     者：Hao Juan Zhang Hong Yang Keyang Lu Chao ChenJiabao Li Yanan 

作者机构：School of Chemical Engineering and TechnologyChina University of Mining&TechnologyXuzhou 221116China 

出 版 物：《International Journal of Mining Science and Technology》 (矿业科学技术学报（英文版）)

年 卷 期：2012年第22卷第2期

页      面：237-242页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：supported by the Funds for Creative Research Groups of China (No. 50921002) the National Natural Science Foundation of China (Nos. 50676103 and 51104160) 

主　　题：MillingCoal powderMineralDistribution 

摘      要：Coal samples obtained from Wanbei(WB),Pingxiang(PX),Liupanshui(LP),and Datong(DT) mines were pulverized,using either a vibration mill or a ball mill,to different degrees of *** effect of the different grinding methods on the mineral distribution within the pulverized coal was investigated by using proximate analysis,particle size analysis,and float-sink *** results show that the ash content in WB,PX,and DT coal increases with increasing particle size overall,while the ash content of the LP coal remain almost the same within each size *** that case the ash in each fraction is similar to that of the raw *** ash versus size distributions for the same coal sample milled with the same grinding method to different degrees of fineness are *** ash versus size distribution of the coal powder with a 15% screen residue that was prepared with the vibration mill is different from the distribution of a similar sample prepared with a ball *** curves also vary between different coal *** grinding method has a great influence on the distribution of minerals across the various particle *** float-sink tests and the laser particle size analysis results on PX and DT coal samples show that fines dominate the higher density fractions although the large +2.0 g/cm3 fraction was dominated by coarse *** size distribution of the low density fraction and +2.0 g/cm3 density fraction is *** size distribution of the intermediate density fraction is multimodal.