| 摘要 |
PROBLEM TO BE SOLVED: To provide a continuous casting method in which the clogging of a nozzle is prevented, a multitude of multiply casting is made possible and a high quality cast piece less in surface and internal defects can be obtained when pouring a molten steel into a mold from a tundish. SOLUTION: In the continuous casting method using an immersion nozzle for pouring the molten steel into the mold, a gas-sucking porous refractory which is disposed on the inner hole face of the immersion nozzle is located at a position satisfying a conditional expression. Further, the inner diameter (d) of flow path in the immersion nozzle at a position just above the refractory in a molten steel pouring direction is made in a range of 0.7 to 0.9 in relation to the inner diameter D of the refractory. Thereby, the molten steel is poured into the mold while performing the suction of gas by the refractory.
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