Abstract
The conveyor consists of a chain being drawn through a pipe. Units handling several tons per hour can be constructed using basic workshop facilities. The operation was demonstrated with a typical mineral (magnetite) and typical grains (mealies and sorghum), using a chain with 25-mm links in pipes with diameters of 25, 38 or 50 mm. Angles ranged from horizontal to 60° and chain speeds from 0.2 to 4 m/s. Through-put varied linearly with chain speed, so that the device has potential also as a controlled solids feeder. The correlations presented enable the essential design parameters of the conveyor to be estimated for materials resembling those tested. The conveyor is intended for small through-puts over distances within 100 m, and when power consumption is not a decisive factor. The rate of wear will depend on the nature of the feed. The suitability of the conveyor for any specific application has to be determined experimentally.
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