Centrifugal screening apparatus

B - Operations – Transporting – 07 – B

Patent

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B07B 9/00 (2006.01) B04B 5/12 (2006.01) B07B 1/20 (2006.01)

Patent

CA 1105413

CENTRIFUGAL SCREENING APPARATUS Abstract of the Disclosure A centrifugal screening apparatus for scalping or sizing bulk materials in which an auger assembly conveys the bulk materials from an intake chamber into a cylindrical screening sleeve mounted within an enclosed screening chamber and subjects the bulk materials to centrifugal force for impingment against the screening sleeve, with the fines passing through the screen for gravity discharge from the screening chamber and the tailings being conveyed to a separate tailings chamber for separate gravity discharge therefrom. The auger assembly within the screening sleeve is equipped with a cylindrical shell integral with the auger assembly and extending the ef- fective length of the screening sleeve that defines along the length of same uniformly spaced apertures thereabout that are separated by imperforate walling. The shell apertures are proportioned to restrict bulk materials movement therefrom under the centrifugal forces involved so that the bulk material feeding action of the auger assembly longitudinally of the screening sleeve acts to distribute the bulk material lengthwise of the shell for uniform screening application of the bulk materials to the screening sleeve. Tramp metal and other foreign materials are retained within the shell for removal when the apparatus is not operating, thereby protecting the screening sleeve against rupture during operation.

340380

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