B - Operations – Transporting – 02 – C
Patent
B - Operations, Transporting
02
C
B02C 23/32 (2006.01) B02C 13/26 (2006.01) B07B 7/083 (2006.01)
Patent
CA 2099650
ABSTRACT Apparatus for grinding material which may comprise a flow of ground material that contains both desirable fines and undesirable oversize particles in which a separator rotor is equipped with shaped blades that isokinetically separate out the oversized particles and centrifuges such particles out of the path of the flow of ground material and into a path for returning the oversize particles for further grinding. The centrifuging of the oversize particles reduces the drag in the flow of the ground material into the separator rotor, and that reduces the horsepower needed to establish the movement of the ground material at a rate that improves the efficiency of the apparatus. A variation of the foregoing develops pressurization of the material in the separator zone so that the oversize ground material is forced to return to be subjected to further grinding under the influence of a differential pressure in the apparatus while the acceptable material is subject to micron sizing in the rotor. The apparatus further coordinates the operation of the rotor to air moving devices used to move the material through the apparatus.
Mitchell Richard J.
Williams Robert M.
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