METHOD FOR GRINDING FINELY DIVIDED MATERIAL

摘要

This invention refers to a method for increasing the efficiency of the grinding of finely divided material, wherein primary material is ground in a counter jet mill (9) and the product formed is classified into a fine fraction and a coarse fraction and the coarse fraction received is returned to the counter jet mill (9). The method is characterized in that coarse fraction is led via a pressure roller crusher (13) to the feed funnel (2) of the counter jet mill.