B - Operations – Transporting – 07 – B
Patent
B - Operations, Transporting
07
B
209/29
B07B 13/00 (2006.01) B07B 13/10 (2006.01) B07B 13/11 (2006.01) B07B 13/16 (2006.01) B07B 15/00 (2006.01)
Patent
CA 1170624
ABSTRACT OF THE DISCLOSURE A particle separation method and apparatus carrying forward the teachings of U.S. patent No. 4,148,725 whereby sepa- ration of particles by density takes place in a size-classified fluidized bed of particles. Particles are disposed on a support- ing surface having a plurality of generally concentric annular vertical reaction surfaces which together forms a plurality of annular channels occupied by the particles to be separated. The supporting surface and annular surfaces are agitated with a gyratory motion so as to induce particles in the fluidized bed to move within channels, and through openings between annular channels, toward a central collection zone. In the improved apparatus, the collection zone includes a plurality of vertically spaced horizontal reaction surfaces which enhance the fluidity of particles within that zone. A vertical barrier surface provides a smaller, annular zone of concentration at the center of the collection zone. Another improvement includes a cover over the top of the¦ annular channels for contacting denser particles dispersed over the top of the fluidized particle bed and driving them downwardly into the channels. Any dispersed particles not driven downwardly are permitted to exit from an aperture as light density waste.
399493
Macrae & Co.
Mineral Recovery Corporation
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