A method for operating ring-furnaces and a device for such...

F - Mech Eng,Light,Heat,Weapons – 27 – B

Patent

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F27B 13/02 (2006.01) F27B 13/06 (2006.01) F27D 1/16 (2006.01)

Patent

CA 2448675

The present invention concerns a method and device for closing off one or more passages in a ring furnace for calcining of carbon bodies in which the furnace, during the calcining process, over an area comprising a small number of sections, is divided into a preheating zone, a firing zone and a cooling zone, which are together successively moved forwards in the furnace. In order to control the false air intake from a first section (K-1) before the preheating zone to the first section (K1) in the preheating zone, one or more lowerable air dampers (4) are placed in the head wall (2). When the air damper (4) or air dampers is/are lowered, it/they blocks/block the supply of false air from the first section (K-1) before the preheating zone to the first section (K1) in the preheating zone.

L'invention concerne un procédé et un dispositif destinés à fermer un ou plusieurs passages dans un four à feu mobile destiné à la calcination de corps carbonés. Au cours du processus de calcination, ledit four est divisé dans une zone contenant un faible nombre de sections, en une zone de préchauffage, une zone de cuisson, et une zone de refroidissement mues successivement en avant dans le four. Pour contrôler toute alimentation d'air inadéquate d'une première section (K-1) en amont de la zone de préchauffage, vers la première section (K1) de la zone de préchauffage, un ou plusieurs clapets abaissables (4) sont placés dans la paroi supérieure (2). Lorsque le ou les clapets (4) sont abaissés, lesdits clapets bloquent toute alimentation d'air inadéquate de la première section (K-1) en amont de la zone de préchauffage, vers la première section (K1) de la zone de préchauffage.

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