易泥化煤泥浮选效果优化研究  

Study on optimization of the effect of flotation of the coal slime containing mudstone prone to degradation in water

作　　者：苏可 李春旭 姜涵悦 陈冬琴 王云琳 王树 包西程 李永改[2] SU Ke;LI Chunxu;JIANG Hanyue;CHEN Dongqin;WANG Yunlin;WANG Shu;BAO Xicheng;LI Yongai(CNH Energy Wuhai Energy,Wuhai 016000,China;School of Chemical Engineering,China University of Mining&Technology,Xuzhou 221116,China)

机构地区：[1]国家能源集团乌海能源有限责任公司,内蒙古乌海016000 [2]中国矿业大学化工学院,江苏徐州221116

出　　处：《选煤技术》2023年第2期54-59,共6页Coal Preparation Technology

基　　金：江苏省自然科学基金青年基金项目(BK20180656)。

摘　　要：为了改善易泥化煤泥浮选效果,基于煤样粒度、密度和岩性分析,采用单元浮选试验,探索了夹矸中不同泥岩占比和不同夹矸含量时的煤泥浮选效果;为进一步提高精煤产率和精煤可燃体回收率,选用KS712、KS736型捕收剂进行煤泥浮选试验。试验结果表明:夹矸中的泥岩占比增加会降低精煤产率和可燃体回收率;煤泥中夹矸含量的增加会使精煤灰分升高,并降低精煤可燃体回收率;当KS712、KS736型捕收剂用量均为25 g/t时,精煤产率分别为51.38%和56.15%,精煤灰分分别为11.34%和12.91%。KS712型捕收剂具有良好的选择性,KS736型捕收剂具有较强的捕收能力,有利于两种捕收剂均适用于易泥化煤泥的浮选作业,可有效提高易泥化煤泥的浮选效果。In order to achieve a better result in flotation of the coal slime which is liable to undergo degradation in water,analysis on size,density and lithology of the coal sample,and batch-flotation test are both made to explore the effect on slime flotation produced by different proportions of mudstone in dirts from mining seam's partings and different proportions of such dirts in coal attaining a higher yield of flotation concentrate product and recovery of collectors.As revealed by test result,the increase of proportion of mudstone in dirts can lead to decrease of yield of concentrate and recovery of combustible matter;the increase of content of dirts in coal slime can cause the rise of concentrate ash and drop of recovery of combustible matter;when the collectors KS712 and KS736 are respectively used at an equal dosage of 25 g/t,the yield and ash of the concentrate products are 51.38%and 56.15%in the former case,and 11.34%and 12.91%in the latter case,respectively;it can be seen that the collector KS712 is exceedingly good in selectivity and the collector KS736 exhibits an extremely high collecting capability;and with the use of both collectors for flotation of the fine coal which is susceptible to degradation in water,the flo-tation efficiency can get effectively improved.

关 键 词：煤泥浮选 易泥化煤泥 煤质分析 新型捕收剂 浮选试验 浮选精煤产率 可燃体回收率 

分 类 号：TD94[矿业工程—选矿]