Molten steel feeder for continuous casting, and method for...

B - Operations – Transporting – 22 – D

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B22D 11/10 (2006.01) B22D 41/50 (2006.01) B22D 41/60 (2006.01)

Patent

CA 2399957

A molten steel feeder for continuous casting and a method for continuous casting using the molten steel feeder; the molten steel feeder, comprising a tundish (1) having an upper nozzle (2) installed at the bottom part thereof, a flow control mechanism (3) installed at the lower part of the upper nozzle (2), an immersed nozzle (4) formed of a refractory having an electric conductivity, one electrode (5) facing the internal space of the tundish (1), the other electrode (6) installed in the immersed nozzle (4), and a power supply part (7) connected to both electrodes (5) and (6); the method for continuous casting, comprising the step of, by using the molten steel feeder, feeding molten steel to a mold while feeding an electric power between the internal surface of the immersed nozzle (4) and the molten steel (8) passing the inside of the nozzle, whereby the oxide of Al in the molten steel can be prevented from adhering to the internal surface of the immersed nozzle, and thus a product defect can be prevented from occurring.

L'invention concerne un dispositif d'alimentation d'acier fondu permettant d'effectuer un moulage par coul~e continue, et un proc~d~ de moulage par coul~e continue utilisant ledit dispositif. Le dispositif d'alimentation d'acier fondu comprend un panier de coul~e (1) dot~ d'une buse sup~rieure (2) install~e au niveau de la partie inf~rieure dudit panier de coul~e; un m~canisme de commande (3) d'~coulement install~ au niveau de la partie inf~rieure de la buse sup~rieure (2); une buse immerg~e (4) form~e d'un mat~riau r~fractaire poss~dant une conductivit~ ~lectrique; une ~lectrode (5) oppos~e ~ l'espace int~rieur du panier d'alimentation (1), l'autre ~lectrode (6) ~tant install~e dans la buse immerg~e (4); et une partie de fourniture d'~nergie (7) connect~e aux deux ~lectrodes (5 et 6). L'invention concerne ~galement un proc~d~ du moulage par coul~e continue consistant ~ fournir de l'acier fondu ~ un moule tout en fournissant de l'~nergie ~lectrique entre la surface int~rieure de la buse immerg~e (4) et l'acier fondu (8) qui passe ~ l'int~rieur de ladite buse, ce qui empÚche l'oxyde d'aluminium contenu dans l'acier fondu d'adh~rer ~ la surface int~rieure de la buse immerg~e, ~vite ainsi l'apparition d'un d~faut de produit.

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