A furnace, its method of operation and control

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

Patent

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F27B 7/12 (2006.01) F23G 5/20 (2006.01) F27B 7/42 (2006.01)

Patent

CA 2516712

The present invention relates to a furnace (10), its method of operation and control. The invention overcomes problems associated with existing furnaces by improving the recovery rate of waste metal. In a preferred embodiment the furnace (10) comprises a cylindrical body of constant internal diameter. The furnace body (12) is mounted on a frame (15) pivoted to a ground members (16a and 16b), the furnace body (12) is adapted to be reclined or inclined or at various angles (.alpha. and .beta.); a burner (30) to heat the furnace, and a door (19a, 19b) for sealing an open end (14). As the internal walls of the furnace body (12) are of a constant diameter, it is no longer necessary to incline the furnace (10) to such a degree in order to pour molten metal, because there is no narrow neck (which previously acted like a weir). In a preferred embodiment combustion air is routed through the door hinge to the burner (30). As a result the air/fuel delivery system has gas tight rotary and elbow joints is attached to the furnace (10) and tilts and moves with the furnace (10). An artificial intelligence system monitors process variables and controls the operation of the furnace (10).

L'invention concerne un four (10), et un procédé d'exploitation et de commande. On supprime les problèmes inhérents aux fours existants en améliorant le taux de récupération des déchets de métal. En mode de réalisation préféré, le four (10) comprend un corps cylindrique de diamètre interne constant. Le corps du four (12) est monté sur un châssis (15) pivoté sur des éléments au sol (16a et 16b), et on adapte ce corps (12) pour l'inclinaison selon différents angles (.alpha. et .beta.); il existe un brûleur (30) pour chauffer le four, et une porte (19a, 19b) pour fermer hermétiquement une extrémité ouverte (14). Etant donné que les parois internes du corps (12) sont de diamètre constant, il n'est plus nécessaire d'incliner le four (10) jusqu'à un certain niveau pour faire couler le métal fondu, parce qu'il existe un col étroit (agissant précédemment comme un déversoir). En mode de réalisation préféré, l'air de combustion passe par la charnière de porte en direction du brûleur (30). Dans ces conditions, le système d'alimentation en air/combustible comporte des articulations rotatives et coudées étanches au gaz qui s'inclinent et se mettent en mouvement avec le four (10). Un système d'intelligence artificielle contrôle les variables de processus et commande ainsi l'exploitation du four (10).

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