选煤时,对粗粒煤采用重力分选法,对细粒煤采用浮选法是有效的。但是,粒度很细的煤粉,在又含有微细粒粘土的情况下,采用浮选法选别是困难的。为了解决微细粉煤的选别,发明了以油作絮凝剂液相球团精选技术。 Coal preparation, the grained coal by gravity separation method, the use of flotation fine coal is effective. However, fine particle size pulverized coal, in the case of finely divided clay, is difficult to sort by flotation. In order to solve the fine selection of fine coal, invented the oil as a flocculant liquid pellet selection technology.