B - Operations – Transporting – 07 – B
Patent
B - Operations, Transporting
07
B
209/151
B07B 13/00 (2006.01)
Patent
CA 1111005
PROCESS AND APPARATUS FOR SEPARATING PARTICLES BY RELATIVE DENSITY Abstract A process and apparatus wherein a size- classified bed of particles is fluidized by agitating a supporting surface (50) with a gyratory motion to fluidize the particle bed. Particles are contacted with surfaces, e.g., vertically projecting surfaces (51) (62) (66) (68), movable with the supporting surface and defining two or more annular regions so as to impart sufficient fluidity to allow the particles to move within the particle bed and distribute themselves ac- cording to their relative densities. Particles are then permitted to move through openings (52) (70) (72) be- tween these annular regions whereby the more dense particles tend to accumulate in one of the annular regions and particles of lesser density are displaced into the adjacent annular region(s). Provision is made for continuously extracting from the aggregate particle mass either or both those particles of lesser density and those of greater den- sity whereby a continuous selective separation of par- ticles according to density takes place. Various con- figurations are used to define annular regions within the particle bed and the flow of the more (or less) dense particles may be either radially inward or out- ward between such annular regions, depending upon the nature of the gyratory motion, and upon other factors more fully described herein, such as the dimensions of the annular regions, particle size and density and the frequency and amplitude of gyration.
320040
Haight William J.
Macrae & Co.
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