| 摘要 |
PROBLEM TO BE SOLVED: To provide an immersion nozzle for continuous casting which properly controls molten steel fluidity within a mold to obtain a cast slag excellent in surface and inner quality in continuous casting of molten steel, and a continuous casting method using the same. SOLUTION: The immersion nozzle for ejecting the molten steel into the mold has a shape such that a spiral swirl vane satisfies a conditional expression, and is located preferably at a position to satisfy the conditional expression in a channel inside the immersion nozzle, or preferably the swirl vane is formed of a porous refractory. The immersion nozzle is used to supply the molten steel into the mold, and inert-gas is blown into the molten steel passing through the channel from the refractory surface at the time of continuous casting. The total amount of the inert-gas blown into the molten steel between a tundish and the mold is made to be within a range to satisfy the conditional expression. Preferably, the molten steel is supplied into the mold, while electromagnetic stirring force is made to act on the vicinity of a control target meniscus in the mold. COPYRIGHT: (C)2004,JPO
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