Importance

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Abstract

A mill (10) for grinding garbage is disclosed including an octagonal shaped grinding chamber (26). Grinding rotors (48-50) are rotatably fixed to a rotatable shaft (44). An impeller rotor (51) is also rotatably fixed to the shaft (44) below the grinding rotors (48-50). The impeller rotor (51) discharges a stream of air, entrapped material, and projectiles into a projectile deflection device (182) which includes an upwardly sloping bottom plate (202) which deflects the projectiles into an end plate (204) to reduce the kinetic energy thereof. The air stream and entrapped material pass from the projectile deflection device (182) into a plenum (210) which reduces the velocity of the air stream to release much of the entrapped material, with the material release being enhanced by baffles (224) providing a tortuous path for the air stream in the plenum (210) before it enters a cyclonic material separator (216). Material anti-wrap provisions (140) in the form of wing plates (152, 154, 156) radially extending from semicylindrical carriers (142a, 142b) are provided between the top plate (28) and the first rotor (48), between the first and second rotors (48, 49), and between the second and third rotors (49, 50). Deflector bars (164) are attached to the axial ends of the wing plates (152, 154, 156) to prevent migration of any wrapped material therebeyond. The upper axial ends of the anti-wrap provisions (140) are positioned within the axial extent of cylindrical deflectors (168) mounted to the top plate (28) and the first and second rotors (48, 49).

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First Claim