05580002 is referenced by 6 patents and cites 18 patents.

Hot gas is introduced into a fluidised bed of 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.

Title
Method and apparatus for heating and grinding materials
Application Number
8/295001
Publication Number
5580002
Application Date
August 24, 1994
Publication Date
December 3, 1996
Inventor
Edward Varney
Ruddington Nottingham
GB
Philip Curtis
Castle Donnington
GB
David J Ball
West Bridgford
GB
Arthur G T Ward
Wollaton
GB
Agent
Birch Stewart Kolasch & Birch
Assignee
BPB Industries Public Company
GB
IPC
B02C 23/32
B02C 23/24
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