A process and apparatus for treating particulate matter

B - Operations – Transporting – 01 – J

Patent

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Details

B01J 8/32 (2006.01) B01J 8/00 (2006.01) B01J 8/36 (2006.01) B01J 8/38 (2006.01) C01B 33/38 (2006.01) C04B 11/028 (2006.01) C22B 1/10 (2006.01) C22B 5/14 (2006.01) F27B 15/00 (2006.01)

Patent

CA 2305260

The present invention provides a process for treating a particulate material, in which particles of the material to be treated interact with non-static particles of a second material, the process comprising the steps of: (i) providing a processing chamber (1) having an inlet (7) and an outlet (10) spaced downstream therefrom, the base (15) of said chamber comprising a plurality of outwardly radiating inclined vanes (20, 25), (ii) providing a host bed of particles (30) in the chamber (1) and generating a flow of fluid through the vanes (20, 25) at the base (15) of the processing chamber such that the bed of host particles (30) circulates about an axis (102) of the chamber in a compact band, (iii) injecting particles of the material to be treated through an inlet (5) of the chamber (1) to contact with the circulating bed of the host particles (30), wherein the relative terminal velocity of the particles to be treated (45) and the host particles (30) is such that there is little or substantially no migration of the host particls to the outlet (10), and wherein substantially all of the particles of the material to be treated migrate downstream through the circulating host particles to the outlet (10).

La présente invention concerne un procédé de traitement de matières particulaires, selon lequel les particules du matériau à traiter coopèrent avec des particules non statiques d'un deuxième matériau. Ce procédé comprend les étapes consistant à (i) prévoir une chambre de traitement (1) comportant une entrée (7) et une sortie (10) espacée en aval de cette dernière, la base (15) de ladite chambre comprenant plusieurs pales (20, 25) orientées vers l'extérieur; (ii) prévoir un lit hôte de particules (30) dans la chambre (1) et générer un écoulement de fluide dans les pales (20, 25) au niveau de la base (15) de la chambre de traitement, de telle sorte que le lit de particules hôtes (30) circule autour d'un axe (102) de la chambre dans une bande compacte; (iii) injecter les particules du matériau à traiter par une entrée (5) de la chambre (1) pour les placer en contact avec le lit de particules hôtes en circulation (30). La vitesse terminale relative des particules à traiter (45) et des particules hôtes (30) est telle qu'il se produit peu ou sensiblement aucune migration des particules hôtes en direction de la sortie (10). En outre, pratiquement toutes les particules du matériau à traiter migrent vers l'aval au travers des particules hôtes en circulation jusqu'à la sortie (10).

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