Classifying – separating – and assorting solids – Stratifiers – Movable bed
Patent
1977-11-25
1979-04-10
Hill, Ralph J.
Classifying, separating, and assorting solids
Stratifiers
Movable bed
209504, B07B 1300
Patent
active
041487257
ABSTRACT:
A process and apparatus wherein a size-classified bed of particles is fluidized by agitating a supporting surface with a gyratory motion to fluidize the particle bed. Particles are contacted with surfaces, e.g., vertically projecting surfaces, 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 according to their relative densities. Particles are then permitted to move through openings between 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 density whereby a continuous selective separation of particles according to density takes place. Various configurations 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 outward 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.
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