B - Operations – Transporting – 03 – B
Patent
B - Operations, Transporting
03
B
209/3
B03B 5/34 (2006.01) B03B 5/30 (2006.01) B03B 5/44 (2006.01) B03B 9/00 (2006.01) B03B 13/00 (2006.01) C01G 49/02 (2006.01)
Patent
CA 1327342
Abstract The present invention provides a method for selecting magnetite to form a dense media for benefi- ciation of fine particulate solids such that the par- ticulate solids are as buoyant with respect to the dense media as if the solids were in a true liquid having a specific gravity equal to that of the dense media. The method involves determining a magnetite particle diameter such that the diameter ratio of par- ticulate solid to magnetite lies above a diameter ratio partition curve. The invention is also directed toward using magnetite having a particle diameter less than about 0.005 mm and a mean particle diameter of about 0.0025 mm. Such magnetite is formed from a gas phase pyrohydrolysis reaction on an aqueous iron (ferrous) chloride solution. The present invention is further directed towards a method for determining the ef- ficiency of separation of a dense media separation pro- cess. This method includes determining an apparent distance a particle must travel in a dense media cyclone to be correctly beneficiated. From this ap- parent distance, an apparent velocity a particle must achieve to be correctly beneficiated is calculated. This apparent velocity is used, along with cyclone geo- metry and operational parameters to calculate a diver- gence value which indicates the efficiency of separa- tion. The present invention also includes a method for selecting cyclone geometry and operating parameters which includes determining separation efficiency and adjusting geometry and parameters in a manner to obtain improved efficiency.
584385
Genesis Research Corporation
Gowling Lafleur Henderson Llp
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