Apparatus and method for separating materials using air

B - Operations – Transporting – 07 – B

Patent

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Details

B07B 9/00 (2006.01)

Patent

CA 2760313

Separating a mixture comprising at least two solid materials comprises transporting the mixture into a plenum, introducing air into the plenum, removing a heavier fraction of the solid materials from the plenum, removing air having a lighter fraction of the solid materials entrained therein from the plenum, removing the lighter fraction of the solid materials from the air that is removed from the plenum, filtering the remaining air, and re-circulating the air back to the plenum. Valves at the locations where material is introduced to and removed from the system can prevent air flow therethrough while allowing the materials to pass. The air can be introduced into the plenum at an angle with respect to the pathway in which the heavier fraction of the materials falls through the plenum, thereby avoiding damage to a screen that diffuses the air being introduced into the plenum.

L'invention concerne la séparation d'un mélange comprenant au moins deux matériaux solides, consistant à : transporter le mélange dans un plénum, introduire de l'air dans le plénum, retirer du plénum une fraction plus lourde des matériaux solides, retirer du plénum l'air présentant une fraction plus légère des matériaux solides entraînés à l'intérieur, retirer la fraction plus légère des matériaux solides de l'air qui est retiré du plénum, filtrer l'air restant, et remettre en circulation l'air dans le plénum. Des clapets positionnés là où le matériau est introduit et retiré du système, peuvent empêcher un flux d'air à travers celui-ci, tout en permettant aux matériaux de passer. L'air peut être introduit dans le plénum selon un angle par rapport à la trajectoire permettant à la fraction plus lourde des matériaux de tomber dans le plénum, ce qui permet de ne pas endommager un crible qui diffuse l'air introduit dans le plénum.

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