SOLID MATERIAL GRINDING APPARATUS Russian patent published in 2000 - IPC

FIELD: grinding equipment. SUBSTANCE: apparatus has two grinding disks positioned one above the other in axially aligned spaced relation, with space being adequate to required size of particles of material to be ground. Upper grinding disk has central funnel-forming charging opening. Both disks have concave conical working surfaces and are mounted for synchronous rotation relative to vertical axis. Lower grinding disk is connected to drive for providing reciprocating oscillations of disk in plane extending in parallel with axis of rotation. EFFECT: increased efficiency, reduced metal usage and decreased power consumption. 3 dwg