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目前,跳汰选煤方法在我国仍占有绝对优势。按入选原煤量计算跳汰选煤占67%以上,即跳汰选煤年入选量约为8000万吨。跳汰选煤所排除的矸石一般为30%左右,每年有2000～2400万吨。跳汰洗矸做为废弃物被白白扔掉。然而,由于跳汰选煤方法的效率较低在洗矸中含有相当数量的低热值的能源,其灰分一般在75%左右,洗矸含煤量(此处系指比重小于1.8
At present, jigging method still occupies an absolute advantage in our country. Calculated according to the selected raw coal jigging coal accounted for 67% or more, that jig selection of the annual election of about 80 million tons. Coal junk excluded by the jig is generally about 30%, each year 2000 ~ 24 million tons. Jigged junk was discarded as waste. However, due to the low efficiency of the jigging coal preparation method, a considerable amount of low calorific value energy is contained in the waste rock, and the ash content is generally about 75%. The coal content of the waste rock washing (here refers to the specific gravity less than 1.8