Dry separation of fine powder from coarse contaminant in a vibrating fluid bed
AssigneeKerr-McGee Chemical Corporation
InventorLarry G. Sherman
Life of this patent
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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.
Claims8
A method for separating coarse particles from TiO.sub.2 powder in a fine powder composition comprising the steps of:
- (a) providing a system wherein a source of said fine powder composition communicates with a minimally fluidizable bed of said fine powder composition within the system;
- (b) delivering said fine powder composition from the source to said bed;
- (c) continuously imparting energy into said bed to disaggregate the fine powder composition and delivering a concurrent flow of a fluidizing gas to said 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 concurrent coarse particle phase;
- (d) removing the TiO.sub.2 powders from the system;
- and
- (e) removing the coarse particles from the system.
Dependencies are inferred from the claim text.