四粒级选煤工艺在邯郸洗选厂的应用

阐述了邯郸洗选厂四粒级选煤工艺的流程,说明流程具有选煤工艺精细化、控制技术数字化、技术装备国际化、先进技术集成化、组织生产简单化等特点。通过对无压三产品重介工艺和CSS粗煤泥分选机的单机检查试验分析了四粒级选煤工艺的运行效果,四粒级选煤工艺投入运行后,解决了大直径旋流器分选细粒煤差的问题,提高了旋流器的分选精度,精煤质量合格,实际产率为58.88%,数量效率达95.96%,可能偏差Ep1,Ep2分别为0.025,0.055,重介质吨原煤介耗仅为0.65kg;CSS粗煤泥分选机最终精煤灰分控制在9.00%左右,平均精煤实际产率为81.25%,数量效率达98.52%,Ep为0.07,实现了1.0～0.5mm的精确分选。最后说明四粒级选煤工艺具有脱泥、无压组合工艺,原煤四粒级分选工艺和煤泥两级浓缩两级回收联合工艺等关键技术,实现了煤炭分选过程的精细化,填补了国内空白。 The four size fraction coal preparation process in Handan coal preparation plant has remarkable technical characteristics such as sophisticated,digitized,international,integrated and simplified. Analyse its effect through carrying out the check tests for pressureless three-product dense medium cyclone and CSS coarse slime separator. Its operation helps large-diameter hydrocyclone better prepare fine coal,improve the separation precision of cyclone, obtain qualified clean coal. The practical yield is 58.88 percent,the quantity efficiency is 95.96 percent,the possible deviation E p 1 , E p 2 is 0.025,0.055,the medium consumption for each ton of raw coal is only 0.65 kg,the ash of final clean coal gotten by CSS coarse slime separator is around 9.00 percent,the average field of clean coal is 81.25 percent,the quantity efficiency is 98.52 percent, E p is 0.07,the coal ranging from 1.0 mm to 0.5 mm could be accurately separated. The process combining desliming,pressureless,four size fraction,slime two-stage concentration and two-stage recovery techniques can nicely separate coal