Facility for producting molten metal in an electric furnace

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

Patent

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F27B 3/08 (2006.01) C21C 5/52 (2006.01) C21C 5/56 (2006.01) F27D 3/00 (2006.01) F27D 13/00 (2006.01)

Patent

CA 2075294

Facility for producing steel by melting scrap comprises an electric furnace (2'), means for supplying individual batches of scrap for charging one at a time into the furnace, and a preheating chamber (4) for preheating each batch of scrap and forming a batch container open at both ends and having a releasable bottom. Moreover, the chamber is mounted on a transporting device for movement between a first, preheating position, in which it is connected to a hot gas circulating circuit, and a second position in which it empties the batch of preheated scrap into the furnace. The lower portion of the side wall of the preheating chamber (4) forms a skirt (43) with a wide downwardly-directed opening, and said chamber (4) is combined, in the preheating position, with a movable device (54) for sealably engaging the lower end (42) of said skirt (43) with a stationary base plate (3) shaped to match said lower end (42), whereby said skirt is sealed in the preheating position.

2075294 9210594 PCTABS00130 L'invention a pour objet une installation de production d'acier par fusion de ferraille comportant un four électrique (2'), des moyens d'approvisionnement de la ferraille sous forme de charges individuelles destinées à être introduites l'une après l'autre dans le four et une enceinte de préchauffage (4) de chaque charge de ferraille qui constitue elle-même un récipient de chargement ouvert à ses deux extrémités et muni d'un fond amovible. En outre, l'enceinte est montée sur un organe de transport permettant de la déplacer entre une position de préchauffage dans laquelle elle est branchée sur un circuit de circulation de gaz chauds et une position de déversement dans le four de la charge de ferraille préchauffée. Selon l'invention, la partie inférieure de la paroi latérale de l'enceinte (4) de préchauffage forme une jupe (43) largement ouverte vers le bas et que l'enceinte (4) est associée, en position de préchauffage, à des moyens amovibles (54) d'application étanche de l'extrémité inférieure (42) de ladite jupe (43) sur un socle fixe (3) de forme conjuguée à celle de l'extrémité inférieure, pour la fermeture étanche de celle-ci dans la position de préchauffage.

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