Efficient production of landplaster by collecting and...

B - Operations – Transporting – 02 – C

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B02C 23/24 (2006.01) B02C 21/00 (2006.01) B02C 23/12 (2006.01) B02C 23/16 (2006.01) C04B 11/00 (2006.01) C04B 11/036 (2006.01) F26B 3/06 (2006.01) F26B 11/02 (2006.01) F26B 17/10 (2006.01) B02C 15/00 (2006.01)

Patent

CA 2201540

A landplaster production method includes the steps of providing a supply of particulate gypsum material, drying the gypsum material by passing a stream of heated air thereby as the material is rotated, classifying and separating the dried particles into fines and coarse particles, collecting the suspended fines in a collector, passing the coarse particles to a grinder such as a roller mill for reducing the particles, and mixing the reduced particles with the collected fines for processing into landplaster. The elimination of fines from the feed to the grinder results in significantly greater production by increasing the efficiency of the grinder. Further, the dryer is modified to agitate the dried gypsum material so that it may be more easily introduced into the classifier/separator situated adjacent the drier discharge outlet.

Méthode pour la production de plâtre fin qui inclut les étapes suivantes : fourniture d'un approvisionnement de gypse particulaire, séchage du gypse en rotation par un courant d'air chaud passant sur ce dernier, classement et séparation des particules séchées en particules fines et grossières, collecte des fines en suspension dans un collecteur, broyage des particules grossières par un broyeur, p. ex. un broyeur à cylindres, afin de réduire leur taille, et mélange de ces particules avec les fines recueillies pour leur transformation en plâtre fin. L'élimination des fines de l'alimentation du broyeur permet d'obtenir une augmentation significative de la production par l'accroissement de l'efficacité du broyeur. De plus, le séchoir a été modifié de façon à agiter le produit de gypse séché afin pour faciliter son transfert dans le classificateur/séparateur situé à côté de la sortie du séchoir.

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