Electric arc low-shaft smelting furnace with a central tube...

C - Chemistry – Metallurgy – 21 – C

Patent

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Details

C21C 5/52 (2006.01) C21B 13/02 (2006.01) C21C 5/56 (2006.01) F27B 1/08 (2006.01) F27B 3/08 (2006.01) F27B 3/18 (2006.01) F27D 3/00 (2006.01)

Patent

CA 2311541

The invention relates to a smelting furnace to smelt metals, especially steel scrap. The inventive furnace consists of a lower receptacle with a tap hole in the bottom and an upper receptacle which can be closed by a lid. A central pipe is arranged in the upper receptacle in a coaxial position with respect to the main axis of the furnace. At least one electrode is provided in said pipe. Said pipe is also provided with a component that encompasses the upper receptacle of the furnace and which can be connected to a gas offtake device. A slit (22) is arranged in the wall of the central pipe (21) in a longitudinal direction and a sleeve (23) is fastened to the edge of the slit, enabling the central pipe to be fastened to the casing of the upper receptacle (12) with a corresponding slit (15). A supporting arm (44) which is connected to a supporting pillar (45) arranged outside the furnace can be guided through the hollow sleeve (23) inside the central pipe (21) with at least one electrode (41) secured on the front face.

L'invention concerne une installation de four de fusion pour la fusion de métaux, notamment de riblons d'acier. Ce four comprend une carcasse inférieure au fond de laquelle est prévu un trou de coulée, et une carcasse supérieure pouvant être fermée par un couvercle et dans laquelle est prévu, coaxialement à l'axe principal du four, un tube central dans lequel est placée au moins une électrode et sur lequel est prévu un élément entourant la carcasse supérieure et pouvant être raccordé à une unité d'évacuation de gaz. Une fente (22) est prévue dans la paroi du tube central (21), dans le sens longitudinal. Une douille (23) fixée sur le bord de la fente permet de fixer le tube central (21) au niveau de l'enveloppe de la carcasse supérieure (12) présentant une fente correspondante (15). En outre, un bras de support (44) raccordé à une colonne de support (45) placée à l'extérieur du four peut être guidé à travers la cavité de la douille (23) jusque dans le tube central (21) au niveau duquel au moins une électrode (41) est fixée côté tête.

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