Process and apparatus for manufacturing granular material

Details Process and apparatus for manufacturing granular material Process and apparatus for manufacturing granular material

D - Textiles, Paper

21

B

D21B 1/08 (2006.01) A01K 1/015 (2006.01) C05D 3/02 (2006.01) C05D 9/00 (2006.01) C05G 3/00 (2006.01) C05G 3/04 (2006.01) D21B 1/02 (2006.01) D21B 1/32 (2006.01) D21B 1/38 (2006.01) D21C 5/02 (2006.01) D21F 1/66 (2006.01)

Patent

CA 2171340

In a process for making a granular material from a reject stream from a coated grade waste paper pulp stock recycling process, the pulp stock is screened so that the reject stream passes through a screen and long fibers are retained for use in making paper. Solid material in the reject stream is separated by flotation (18). Water is removed from the reject stream to increase its consistency to that of modeling clay (40). The reject stream is supplied to an agglomerator (46) which forms uniform granules of irregular but approximately spherical shape. The granules are then dried (50) so that the granules have a solids content greater than 95 %. Apparatus for performing the process and characteristics of granular material ? by the process and apparatus are also described.

Dans un procédé de production d'un matériau granulaire à partir d'un écoulement de rejet provenant d'un procédé de recyclage de pâte de papier couché usagé, la pâte est tamisée de telle manière que l'écoulement de rejet traverse un tamis et que les fibres longues sont retenues, afin de les utiliser pour produire du papier. La matière solide de l'écoulement de rejet est séparée par flottage (18). L'eau est extraite de l'écoulement de rejet, de façon à augmenter la consistance de celui-ci, afin qu'elle soit semblable à celle de l'argile de modelage (40). L'écoulement de rejet alimente un agglomérateur (46) qui produit des granulés uniformes de forme irregulière mais approximativement sphérique. Les granulés sont ensuite séchés (50) de manière que leur teneur solide est supérieure à 95 %. L'invention concerne également le dispositif servant à mise en application du procédé ainsi que les caractéristiques de la matière granulaire formée au moyen du procédé et de l'appareil.

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