论文部分内容阅读
一、难筛分煤的评定方法近年来,由于采煤机械化程度的提高,井下灭尘的喷水量增加,致使原煤水分增大,因而原煤分级筛筛孔堵塞的现象十分严重。为解决粘湿原煤的干法筛分问题,国内外相继研制出一批用于难筛分煤的筛分机。特别是英国还制定了评定末煤干法筛分(指从25～0毫米原煤中筛分出小于4或5毫米的细粒煤)的困难度的方法,即根据煤的可处理性指数来评定筛
First, the difficult screening of coal screening method In recent years, due to the increased degree of mechanization of coal mining, underground water spray dust increases, resulting in increased raw coal moisture, so the coal grading sieve mesh plugging phenomenon is very serious. In order to solve the problem of dry screening of sticky wet raw coal, a batch of screening machines for difficult screening of coal have been developed at home and abroad. In particular, the United Kingdom has also developed a method of assessing the difficulty of final coal dry screening (which refers to the fractionation of fine coal less than 4 or 5 millimeters from 25 to 0 millimeter raw coal) based on the coal treatability index Assessment screen