B - Operations – Transporting – 04 – B
Patent
B - Operations, Transporting
04
B
233/2
B04B 5/00 (2006.01)
Patent
CA 1237407
ABSTRACT A method of separating lighter and heavier particles in a solids mixture includes entraining the mixture in a liquid of a specific gravity intermediate the specific gravities of the lighter and heavier particles. The liquid with entrained mixture is fed through a first opening into one end of a vessel and revolved therein by rotating the vessel. The vessel is designed so that the liquid attains a dynamic equilibrium at which an annular, centrifugally induced, substantially static, revolving volume of the liquid of stable internal surface is confined by the vessel about the axis of revolution while further liquid flows on within the stable internal surface. The heavier particles are thereby centrifugally directed into the annular volume while the lighter particles remain entrained in on-flowing liquid which flows out a second opening in the other end of the vessel. Feeding of the mixture to the vessel is discontinued, and the rotating vessel slowed and stopped to release the annular volume of the liquid, which then, with the heavier particles entrained, swirls towards and flows through one of the openings. In apparatus for performing this method, bearing means is provided to support the vessel for rotation about the axis of revolution, which passes through or near the openings, and the vessel has a smooth continuous interior surface, free of negative slopes, edges or bends for a liquid droplet swirling towards the one opening, whereby sufficient swirling liquid is able to clean the whole of such smooth interior surface of heavier particles.
458485
Bassett Neville C.
Ensor Paul M. Dev.
Broken Hill Proprietary Company Limited (the)
Riches Mckenzie & Herbert Llp
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