Dry separation of fine powder from coarse contaminant in a vibra

Details Dry separation of fine powder from coarse contaminant in a vibra Dry separation of fine powder from coarse contaminant in a vibra

1996-02-28

1997-09-23

Dayoan, D. Glenn

Classifying, separating, and assorting solids

Special applications

209474, B07B 400

Patent

active

056695098

ABSTRACT:
A method for separating coarse particles from TiO.sub.2 powder in a fine powder composition by the steps of: providing a system in which a source of the fine powder composition communicates with a minimally fluidizable bed of the fine powder composition within the system; delivering the fine powder composition from the source to the bed; imparting energy into the bed and delivering a fluidizing gas to the bed at a rate to cause the TiO.sub.2 powder and coarse particles of the fine powder composition to separate into a TiO.sub.2 powder phase and a coarse particle phase; removing the TiO.sub.2 powder from the system; and removing the coarse particles from the system.

REFERENCES:
patent: 2903132 (1959-09-01), Berry
patent: 4546552 (1985-10-01), Cahn et al.
patent: 4741443 (1988-05-01), Hanrot et al.
patent: 5047387 (1991-09-01), Talmy et al.
patent: 5299694 (1994-04-01), Rambaud

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