Method for separating adhered paper from paper-covered...

B - Operations – Transporting – 07 – B

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B07B 9/00 (2006.01) B03B 9/06 (2006.01)

Patent

CA 2480253

A method and apparatus for separating adhered paper from paper-covered gypsum board, involving passing the gypsum board past a magnet (16) to automatically remove ferrous materials from the gypsum board without stopping the process/apparatus, pulverizing (18) that gypsum board into a screenable mixture of pieces of paper and smaller separated gypsum board particles, and then screening (20) that mixture and segregating the pieces of paper from the gypsum board particles. This method and apparatus may optionally also include an area for manually pre-sorting and removing non-gypsum materials from the gypsum board prior to pulverization, may optionally also include additional screening steps, and may optionally also include passing the screened and segregated gypsum board particles past a second magnet. The magnets may have self-cleaning belts.

L'invention concerne un procédé et un appareil permettant de retirer le papier collé sur une plaque de plâtre recouverte de papier. Ledit procédé consiste à : passer la plaque de plâtre à proximité d'un aimant (16) afin d'enlever automatiquement les matériaux en fer se trouvant sur la plaque de plâtre sans interrompre le processus/le fonctionnement du dispositif ; pulvériser (18) la plaque de plâtre pour obtenir un mélange criblable constitué de morceaux de papier et de particules séparées plus petites de plaque de plâtre ; puis cribler (20) ce mélange et séparer les morceaux de papier des particules de plaque de plâtre. L'appareil selon l'invention peut éventuellement aussi comprendre une zone permettant d'effecteur un pré-tri manuel et de retirer manuellement les matériaux non gypseux contenus dans la plaque de plâtre, avant l'étape de pulvérisation. Le procédé peut en outre éventuellement comporter des étapes de criblage supplémentaires et éventuellement comprendre le passage des particules de plaque de plâtre criblées et séparées à proximité d'un second aimant. Les aimants utilisés peuvent comporter une bande autonettoyante.

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