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-  2013 

分选机在余吾选煤厂的应用 ( )

Keywords: TBS干扰床分选机,粗煤泥分选,螺旋分选机,分选密度,精煤灰分 teetered bed separator(TBS),coarse slime separation,spiral separator,separation density,ash of clean coal

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Abstract:

通过对余吾选煤厂入选原煤性质的分析,说明试验煤样为低硫中灰贫煤,其中-1.5kg/L粗煤泥占煤泥总量的80%以上,粗煤泥中精煤含量较高、灰分较低,回收粗煤泥经济效益显著。阐述了TBS干扰床分选机的工作原理,说明其具有分选效果好,分选密度下限低,对入料煤质适应性好,入料分配系统简单等特点。针对余吾选煤厂分选粗煤泥时存在的精煤灰分过高、尾煤灰分较低、颗粒分级不均衡等问题,鉴于TBS分选机的高效分选效果,决定采用TBS干扰床分选机代替螺旋分选机。试验表明:TBS干扰床分选机分选密度为1.35 kg/L,倾斜板角度为85°时,粗煤泥分选效果最佳,精煤灰分和尾煤灰分分别为10.42%和68.64%,降低了精煤灰分,提高精煤产率,减少后续浮选工作负荷,有利于提高选煤厂综合经济效益。 The analysis of raw coal properties in Yuwu coal preparation plant shows that,it's low-sulfur medium-ash meager coal,-1.5 kg/L coarse slime yield account for more than 80 percent of total coarse slime.There are high content clean coal in coarse slime and its ash is low,so the recovery of coarse slime has remarkable economic benefits.Describe the working principle of TBS,which shows that it has a great separation effect,lower limit of separation,good adaptability to feed coal,simple feed coal distribution system.To solve the problems in Yuwu coal preparation plant,such as high ash of clean coal,low ash of tailings and uneven size,replace the spiral separator with TBS.The results show that,when the separation density is 1.35 kg/L,the angle of inclined plate is 85°,the separation effect is the best.The ash of clean coal and tailings is 10.42 percent and 68.64 percent.The application of TBS decreases the ash of clean coal and load of flotation process,increases the clean coal yield and economic benefits

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