B - Operations – Transporting – 02 – C
Patent
B - Operations, Transporting
02
C
B02C 21/00 (2006.01) B02C 15/00 (2006.01) C04B 11/028 (2006.01) C04B 11/036 (2006.01) F27B 15/00 (2006.01) F27D 3/00 (2006.01)
Patent
CA 2130965
ABSTRACT METHOD AND APPARATUS FOR HEATING AND GRINDING MATERIAL Hot gas is introduced into a fluidised bed of the granular material, for example gypsum, contained in a vessel 10 having a grinding device or mill 11 in its lower region, which may comprise grinding rollers 15 cooperating with a table 17 on the base of the vessel. The gas may be supplied through a tube 20 passing down through the vessel, while raw material is fed into the bed, preferably by a feed screw 34. The ground product is discharged from the bed by an overflow 28 which determines the level of the bed.
Ball David John
Curtis Philip
Varney Edward
Ward Arthur George Terry
Bpb Industries Public Limited Company
Fetherstonhaugh & Co.
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