干法重介质分选机对宽沟矿超低灰煤的分选

Dry separation of Kuangou ultra low-ash coal with dense medium separator

阐述了干法重介质分选机的工作原理,并对神华集团新疆宽沟矿原煤性质进行了分析,发现其为极难选煤。在阐述干法重介质分选系统的基础上,分别对新疆宽沟矿80～3,50～6,30～13 mm粒级原煤进行分选,以确定分选后的精煤产品质量是否满足活性炭用煤要求,同时对干法重介质分选机分选各粒级原煤时的分选精度进行了对比。结果表明:干法重介质分选机及分选工艺对新疆宽沟矿原煤分选制备超低灰活性炭用煤完全可行;3种粒级原煤选后产品灰分分别为3.94%,3.92%和3.71%,分选可能偏差Ep分别为0.080,0.060和0.045,可见30～13 mm原煤选后精煤产品灰分、可能偏差均最低,分选精度最高,是最佳的活性炭用煤原料。

Introduce the operating principle of dry dense medium separator, analyse the property of Kuangou raw coal Shenhua Group. The results illustrate that the Kuangou coal is extremely difficult to separate. To determine whether the clean coal meet the need for activated carbon preparation, respectively separate three kinds of Kuangou raw coals whose particle size range from 80 mm to 3 mm,50 mm to 6 mm,30 mm to 13 mm. Meanwhile, compare the separation precision of the separator. After separation, detect the ash content of the clean coal, find that they are 3.94 percent, 3.92 percent and 3.71 percent respectively. The probable error Ep is 0. 080,0. 060 and 0. 045. So the raw coal ranging from 30 mm to 13 mm is the best material ,both ash content and Ep of clean coal are the lowest,the separation precision is the highest.