Method for making steel in a liquid melt-fed electric furnace

Details Method for making steel in a liquid melt-fed electric furnace Method for making steel in a liquid melt-fed electric furnace

C - Chemistry, Metallurgy

21

C

C21C 5/52 (2006.01)

Patent

CA 2259522

A method for making steel in an electric furnace, wherein a predetermined amount of liquid melt is fed into the electric furnace, is disclosed. The method comprises the steps of (a) continuously feeding a controlled flow of liquid melt into the furnace without interrupting the heating from the electric arc, (b) continuously injecting a refining gas into the furnace before the C and/or Si content of the metal bath reaches a predetermined value, until the end of the feeding process, and (c) pursuing the injection of refining gas after the predetermined amount of melt has been fed into the furnace, until the target value for the C and/or Si content of the metal bath has been reached.

On présente un procédé de fabrication d'acier dans un four électrique, dans lequel une quantité déterminée de fonte liquide est enfournée dans le four électrique, et qui comprend les étapes suivantes: a) enfournement de fonte liquide en continu et à débit contrôlé sans interruption du chauffage par l'arc électrique, b) injection d'un gaz d'affinage dans le four avant que la teneur en C et/ou en Si du bain métallique n'ait atteint une valeur limite déterminée, l'injection ayant lieu en continu jusqu'à la fin de l'enfournement, et c) continuation de l'injection du gaz d'affinage après l'enfournement de la quantité de fonte prévue jusqu'à ce que la valeur cible de la teneur en C et/ou en Si du bain métallique soit atteinte.

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