Direct current electric furnace

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

Patent

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F27D 11/10 (2006.01) C21C 5/52 (2006.01) H05B 7/11 (2006.01)

Patent

CA 2057882

The object of the invention is a directcurrent electric furnace for melting raw material, especially scrap metal. According to the invention, a d.c. electric furnace is constructed comprising two consumable electrodes (21, 22) separated from each other and both laterally offset towards the median plane P1 of the chamber (1) turned towards the current source (4) and at least four fixed electrodes distributed on either side of the median plane and substantially arranged at the angles of a regular polygon which is symmetrical in relation to the median plane and fitted between the vertical projections of the consumable electrodes, where the conductors of the electrodes on the source side are aimed directly at it parallel to the conductors of the consumable electrodes, and the conductors of the electrodes on the side opposite the source each comprise a first branch by-passing the vertical projection of the corresponding consumable electrode and a second branch directed towards the source parallel to the conductors connected to the consumable electrodes.

2057882 9114912 PCTABS00106 L'invention a pour objet un four électrique à courant continu pour la fusion de matière brute métallique, spécialement de la ferraille. Selon l'invention, on réalise un four électrique à courant continu comprenant deux électrodes consommables (21, 22) écartées l'une de l'autre et décalées latéralement toutes deux du côté du plan médian P1 de la cuve (1) tourné vers la source de courant (4), et au moins quatre électrodes fixes réparties de part et d'autre du plan médian et disposées sensiblement aux sommets d'un polygone régulier symétrique par rapport au plan médian et placé entre les projections verticales des électrodes consommables, les conducteurs des électrodes placées du côté de la source étant dirigés directement vers celle-ci, parallèlement aux conducteurs des électrodes consommables et les conducteurs des électrodes placées du côté opposé à la source comprenant chacun une première branche contournant la projection verticale de l'électrode consommable correspondante et une deuxième branche dirigée vers la source parallèlement aux conducteurs reliés aux électrodes consommables.

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