Grinder

Solid material comminution or disintegration – Processes – By utilizing kinetic energy of projected or suspended material

Reexamination Certificate

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Details

C241S275000

Reexamination Certificate

active

10514601

ABSTRACT:
A grinder is disclosed which has a housing (12) in which a rotatable disc (60) is mounted. The disc (60) is rotated by a motor (40)and the disc (60) has a periphery which is adjacent an inner stationary wall (102) of the housing (12). An air inlet (108) is arranged below the disc and the disc carries vanes (100) so that when the disc rotates, an annular air stream is created at the periphery of the disc in which a grinding zone is established between the periphery of the disc and the stationary wall (102) for grinding material into small particles. The grinding zone includes an annular flow of heavy gas R1. A material inlet (20) is provided for allowing material to enter the housing (12). Large material is grounded by energy intensification after it hits the disc (60) and collides with the inner wall (40) of the housing so as to break down the material into smaller particle size, which can then move to the grinding zone at the periphery of the disc (60) to be further ground into small particles. The small particles are collected through an outlet (16) and may be supplied to separators for separating the small particles from exhaust air from the housing (12).

REFERENCES:
patent: 2012694 (1935-08-01), Runyan
patent: 3162382 (1964-12-01), Danyluke
patent: 5353997 (1994-10-01), Kasseck et al.
patent: 5542615 (1996-08-01), Yu
patent: 0 696 475 (1999-11-01), None
patent: WO 98/16316 (1998-04-01), None
patent: WO 01/45846 (2001-06-01), None
patent: WO 02/07887 (2002-01-01), None

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