Dry granulating method and apparatus

Details Dry granulating method and apparatus Dry granulating method and apparatus

1990-11-07

1992-06-23

Theisen, Mary L.

Plastic and nonmetallic article shaping or treating: processes

Reactive gas or vapor treatment of work

23313R, 23313FB, 264 401, 264 403, 264101, 264117, 425140, 425222, B29C 6702, B29B 908

Patent

active

051241005

ABSTRACT:
Uniform spherical granules are produced from powder raw material without utilizing an agglomerating liquid by repeatedly and alternately compacting a dry powder raw material within a granulating vessel to cohesively form agglomerates of the material and fluidizing the powder material within the vessel to break up and form the agglomerates gradually into a uniform spherical shape.

REFERENCES:
patent: 2586818 (1952-02-01), Harms
patent: 2689973 (1954-09-01), Lee et al.
patent: 3735498 (1973-05-01), Suzukawa et al.
patent: 3927988 (1975-12-01), Frazier
patent: 4820463 (1989-04-01), Raufast
patent: 4980106 (1990-12-01), Vogel
Journal of Chemical Engineering of Japan, "Fluidization State of Ultrafine Powders", Morooka, Kusakabe, Kobata & Kato, vol. 21, No. 1, 1988, pp. 41-46.
"The Use of Gas Pressure Gradients to Control Powder Packing Density", by A. G. McLean et al.
"Apparent Size of Agglomerates in Fluidized Beds of Submicron Powders", by S. Chiba, et al.
Powder Technology, 43 (1985) 117-125, "Effect of Interparticle Forces on the Hydrodynamic Behavior of Fluidized Aerogels", by J. Chaouki et al.

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