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(11) | EP 0 492 924 A3 |
(12) | EUROPEAN PATENT APPLICATION |
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(54) | Method and apparatus for separation of heavy and light particles from particulate material |
(57) Apparatus for the separation of heavy and light particles from particulate material
which includes means for fluidising and agitating the material to cause heavy particles
to sink from the acceptable material and comprising a deck adapted to receive material
at a reception end and means for vibrating said deck to cause the material to move
longitudinally along it to a discharge end, said deck having a number of longitudinally
extending troughs separated by peaks and providing an upwardly directed air flow in
the troughs characterised by control means for causing the velocity of the upwardly
directed fluidising air in each trough to initially increase to a point below the
peaks and to then continue upwards at a reducing velocity. |