高灰煤泥难选原因分析及分选技术探讨  

Cause Analysis for separation difficulty of high ash fine coal and discussion on the separation techniques

作　　者：于跃先 马力强[1] 张志军[1] 李吉辉[2] 孙先凤[1] 

机构地区：[1]中国矿业大学(北京)化学与环境工程学院,北京100083 [2]清华大学材料学院,北京100084

出　　处：《煤炭工程》2016年第7期118-121,共4页Coal Engineering

基　　金：北京市自然科学基金青年基金项目(3154037);高等学校博士学科点专项科研基金(20130023120022)

摘　　要：分析了高灰煤泥难选的原因并探讨了现有的分选技术和新型分选设备,得到的主要结论如下:高灰细泥夹带是造成精煤污染的主要原因,高灰细泥罩盖将导致煤的可浮性下降,致使部分低灰精煤损失在尾煤中,造成浮选可燃体回收率下降;高灰细泥增加药耗,影响煤泥的浮选;现有的分选技术主要为粗选加精选、脱泥浮选、分级浮选、分支浮选、调浆浮选等,其中脱泥浮选和分级浮选具有相对优势;新型分选设备主要有FJG-S8振荡浮选机和沉降-旋流微泡浮选柱(S-FCMC)等,以上技术及设备均取得了一定效果,但仍需进一步研究。This paper analyzes the reason for separation difficulty of high ash fine coals and discusses the current separation techniques. The main conclusions are as follows： the entrainments of high ash fine slimes is the main cause for contamination of concentrates,especially the clay minerals; Furthermore,slimes coating causes a deterioration in coal floatability and making a portion of low ash coals sink into tailings which may cause a loss to the combustible recovery;Moreover,high ash fine slimes has a damaging effect on floatation process because of the increasing reagent consumption.The current separation technologies consist of rougher- cleaner system,desliming floatation,classified flotation,branch flotation,high shear conditioning and depressants etc., the desliming floatation and classified flotation has a distinct advantage. The above technologies have obtained a certain effect,but further research is needed.

关 键 词：难选煤泥 浮选 细泥夹带 罩盖 调浆 

分 类 号：TD943[矿业工程—选矿]