MILL FOR MATERIALS SELF-GRINDING Russian patent published in 2001 - IPC

FIELD: mining industry. SUBSTANCE: mill for grinding ore and other raw materials has housing with vertical shaft inside it. Hollow conical bowls are positioned for rotation in opposite directions around vertical shaft. Bowls are located so that their bases face one another to define working chamber with annular discharge slit. Upper bowl has charging device built in axial charging opening made in upper bowl. Charging device is made in the form of auger with tubular shaft. Steam supply branch pipe mounted within tubular shaft has lower end positioned above lower end of upper bowl. Pneumohydraulic aerator may be mounted above inlet end of spout. Auger may be equipped with independent drive. Lining ribs may be fastened to inner surface of bowls. Mill of such construction provides for continuous intensified grinding of materials. EFFECT: increased efficiency, improved quality of surface of useful component particles and wider range of materials that may be ground by mill. 2 cl, 1 dwg