Highly efficient calcination of gypsum to hemihydrate

Details Highly efficient calcination of gypsum to hemihydrate Highly efficient calcination of gypsum to hemihydrate

C - Chemistry, Metallurgy

04

B

23/103, 39/38

C04B 11/02 (2006.01) B01J 6/00 (2006.01) C04B 11/028 (2006.01) F27B 9/14 (2006.01)

Patent

CA 1315956

Abstract of the Disclosure Hydrodynamic pumping of the fluidized calcining mass in a kettle is set up by the continuous flow of the mass to and from heating rods immersed therein which are constantly emitting at least about 1 British Thermal Unit of heat per minute per square inch of the surface of the rods. The transfer of heat from the walls and bottom of the kettle is enhanced so that more of the available heat is actually absorbed than in a kettle lacking such heating rods. The rate of calcination may be increased while the rate of heat input is decreased.

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