CRUSHING DEVICE

摘要

PURPOSE:To improve the crushing efficiency of a crushing device for cement material and reduce the size thereof. CONSTITUTION:A crushing device which comprises a vertical roller mill 13 having a roller pressed into contact with the top of a table rotatably driven about the vertical axis and the crushed material discharged by a gas sent under pressure from below the table; a dust collector 21 for collecting the coarse particles from the vertical roller mill 13; a classifying device 28 for sorting out as article the fine particles from the coarse particles being sent with an air stream from the dust collector 21; and a tube mill 24 adapted to pulverize the coarse particles from the dust collector 21 and the classifying device 28 and thereafter conduct the resulting powdered material into the classifying device 28.