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一、引言重介选煤是一种选煤方法,该法是将入选原煤置于比重介乎精煤与矸石之间的液体内而使之分选。灰分和比重有着一定关系,因此,就可以调整悬浮液(通常由细砂或磨细的磁铁矿粉或其它一些合适的固体和水组成)的比重把煤中构成灰分的杂质降到合乎所需的程度。
I. INTRODUCTION Heavy-medium coal preparation is a coal preparation method. The method is to separate the selected raw coal into the liquid with the specific gravity of between the clean coal and the waste rock. The ash content is proportional to the specific gravity so that the specific gravity of the suspension (usually composed of fine sand or ground magnetite or some other suitable solid and water) can be adjusted to reduce the ash content of the ash in the coal Degree of need.