Air classifier with centrifugal action

B - Operations – Transporting – 07 – B

Patent

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Details

B07B 7/083 (2006.01) B07B 11/04 (2006.01) B07B 11/06 (2006.01)

Patent

CA 2257674

The invention concerns an air classifier with centrifugal action comprising a rotor (10) with vertical axis provided with blades (14) evenly distributed on its periphery, guide vanes arranged around the rotor (10) and a shell containing the rotor (10) and the guide vanes, and provided with intakes for air and the material to be classified, with a discharge conduit (22) for the air loaded with the fine fraction of the material and an outlet for the coarse fraction, the air penetrating into the rotor (10) at its periphery, through channels (15) formed between the blades (14), and circulating inside the rotor (10) towards the discharge conduit (22). In order to modify the particle size distribution of the finished product, the air circulating in the rotor (10) is divided into at least two separate currents, and the rotor (10) is equipped with means for adjusting (28) the speed and/or the rate flow of at least one of the currents.

Séparateur à air à action centrifuge comportant un rotor (10) à axe vertical muni de pales (14) régulièrement réparties sur sa périphérie, des aubes directrices disposées autour du rotor (10) et une enveloppe contenant le rotor (10) et les aubes directrices et munie d'entrées pour l'air et pour le matériau à classer, d'un conduit d'évacuation (22) pour l'air chargé de la fraction fine du matériau et d'une sortie pour la fraction grossière, l'air pénétrant dans le rotor (10) à sa périphérie, par les canaux (15) formés entre les pales (14), et circulant à l'intérieur du rotor (10) vers le conduit d'évacuation (22). Pour pouvoir modifier la distribution granulométrique des particules dans le produit fini, l'air circulant dans le rotor (10) est divisé en au moins deux courants distincts, et le rotor (10) est équipé de moyens de réglage (28) de la vitesse et/ou du débit d'au moins un des courants.

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