Process and device for the separation of viscoplastic...

B - Operations – Transporting – 07 – B

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B07B 1/20 (2006.01) B02C 13/13 (2006.01) B03B 1/00 (2006.01) B03B 1/04 (2006.01) B29B 17/02 (2006.01) D21B 1/32 (2006.01)

Patent

CA 2251577

A process and a device are provided herein for the dry separation of viscoplastic elastic materials from fibrous materials which defiberize under mechanical stress. The viscoplastic elastic materials and the fibrous materials are present essentially as composite materials. The method includes defiberizing the composite materials under mechanical stress. Thus the materials to be separated are subjected to high acceleration and impact forces in radial, axial and tangential directions. The mass of defiberized fibrous material and the mass of viscoplastic elastic materials in the mass flow of non-shredded viscoplastic elastic material and defiberized fibrous material is withdrawn separately from the mass of viscoplastic elastic materials which are in an essentially non- shredded state.

L'invention concerne un procédé de séparation de matériaux viscoplastiques tels que des matières plastiques et du caoutchouc, et de matériaux se déchirant ou se défibrant sous l'effet de sollicitations mécaniques, tels que du papier, ainsi qu'un dispositif permettant de mettre ledit procédé en oeuvre. Le procédé se caractérise en ce que le mélange des matériaux à séparer est soumis à des forces d'accélération radiales, axiales et tangentielles élevées, un courant massique de matériau fibreux broyé et un courant massique de plastique sensiblement non broyé étant extraits séparément. Le dispositif de mise en oeuvre dudit procédé comprend un panier égoutteur (1) cylindrique ou de préférence polygonal, dont la paroi extérieure comporte des perforations (2) pour permettre au matériau défibré de passer. A l'intérieur dudit panier, il est prévu un arbre d'entraînement (3) monté coaxialement, sur lequel sont fixées des aubes de préférence solidarisées avec ledit arbre d'entraînement.

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