A method and an apparatus for recycling different components...

B - Operations – Transporting – 02 – C

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B02C 23/08 (2006.01) B02C 7/06 (2006.01) B02C 23/10 (2006.01) B03B 1/00 (2006.01) B03B 9/06 (2006.01) B07B 1/20 (2006.01) D21B 1/02 (2006.01) D21B 1/32 (2006.01)

Patent

CA 2258968

A method of recovering the different components of multiple layer materials, for instance consisting of pieces (20) of paper, plastic and aluminium foil, comprises delivering the material to the infeed zone (4) of a refiner or disperser (2) that includes mutually opposing discs (5; 6) which include material engagement surfaces or material engagement elements (5a; 6a) and which rotate relative to one another. The gap between the discs (5; 6) is adjusted so that the material present therebetween will be subjected to shear forces that result in rapid mutual separation of the various layers of material. Separated pieces (20'; 20'') of the various layers are pumped in the form of a suspension to a horizontal, rotating, perforated drum (3) which includes an inner screw feeder and to which further suspension or dilution liquid is supplied. Suspended readily slushed or pulped material pieces depart through perforations (3a), whereas layer material (20'') that is not readily slushed or pulped is discharged through one end of the drum. The invention also relates to plant that operates in accordance with the inventive method.

Un procédé de récupération des différents constituants de matériaux multicouches, constitués, par exemple, de pièces (20) de feuille de papier, de plastique et d'aluminium, consiste à acheminer le matériau vers une zone d'alimentation (4) d'un raffineur ou d'un disperseur (2) comprenant des disques opposés mutuellement (5; 6) dotés de surfaces ou d'éléments (5a; 6a) au contact du matériau tournant l'un par rapport à l'autre. L'espace entre les disques (5, 6) est réglé de sorte que le matériau présent entre ceux-ci soit soumis à des forces de cisaillement permettant la séparation mutuelle rapide des diverse couches de matériau. Les pièces séparées (20', 20'') des diverse couches sont pompées sous la forme d'une suspension, par un tambour horizontal tournant perforé (3), lequel comprend une unité d'alimentation à vis intérieure et reçoit le liquide de suspension ou de dilution. Les pièces de matériau en suspension, facilement triturées ou réduites en pâte, passent par les perforations (3a), alors que le matériau en couche (20'') non trituré ou réduit en pâte facilement est déchargé par une extrémité du tambour. L'invention concerne également une installation fonctionnant selon le procédé de l'invention.

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