INTENDED cylinders separate grains based on differences in shape while inclined drapers effect separation on the basis of differences in surface textures of the particles. In contrast, the electromagnetic separator effects separation based on differences in the electrical properties of the grains and the foreign matter.
All the above previous methods have limited successes in removing stones from grains. However, the specific gravity table has been reported to achieve efficient separation of stones from grains (Henderson and Perry, 1976).
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