Testing the possibility of using a selective crushing process for selected types of hard coal

Abstract

The article describes the design solutions of KOMAG drum crushers. In the case of significant differences in hardness of coal and gangue, these devices are the most appropriate and the cheapest means of preliminary beneficiation of run-of-mine. The results of laboratory tests of susceptibility to selective crushing of selected hard coal types by the drop method are presented. The possibilities of using a drum crusher for deshaling the analyzed materials are determined.

Selective Crushing of Run-of-Mine as an Important Part of the Hard Coal Beneficiation Process

“…Stone removal can be carried out by the "dry" method, which uses the selective crushing method, or the "wet" method using the differences in the density of coal and waste rock [20].…”

“…The tests that can be carried out by two methods, drop and drum, in addition to the decision on the possibility of using the selective crushing process, should allow for positive results of analyses and technological and economic analyses to select the basic parameters of the device, i.e., diameter and rotational speed of the crusher drum [20,21].…”

“…Crushed grains of lower compactness, most often coal, are discharged through holes in the side, while grains of higher compactness, most often stone, move along the drum's axis and discharged from the crusher through an outlet opening at its end [20,22].…”