| 摘要 |
A multi-stage means for sorting mixtures of solids The means for sorting light from heavy material in mixtures of solids containing lumpy, granular and pulverulent constituents substantially comprises an upright slim container (1,2,3) having a bottom region (3) into which material for sorting is introduced. Pulsating air flows are introduced from the exterior into the container (1, 2, 3), resulting in a upward flow of pulsating air which loosens the material for sorting and produces a fluidized bed. Simultaneously the device is vibrated up and down in linear manner by vibrators (22), which assist in loosening the material for sorting. the light material floating in the air stream is conveyed to a delivery channel (5) at the top end of the container, whereas heavy material rapidly sinks, down to a pipe portion (9, 9a) into which a second pulsating air flow is introduced, in order additionally to sort the heavy material in a last treatment stage inside the pipe portion (9, 9a), Any fins material present flows through a screen (8) into a collecting container (7) from which it is blown out through a spigot (18). A weight-dependent circuit periodically opens a closure means (13) at the outlet of pipe portion (9, 9a), so that heavy material which has accumulated in pipe portion (9, 9a) can flow out downwards. Fig.1
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