| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for managing an immersed nozzle, by which method a casting operation can be stably performed and the inclusion of mold powder and the surface crack of a cast product can be prevented. SOLUTION: In the method for managing the immersed nozzle, molten steel 3 existing in a tundish 4 is supplied into a casting mold 5 via the immersed nozzle 7, and the supplied molten steel 3 is cast while being electromagnetically stirred, and the casting operation is carried out in the state that the position of the immersed nozzle 7 with respect to the casting mold 5 satisfies the following condition, (L0-L1)/L0≥0.23, where L0 shows the minimum distance from the inside surface of the casting mold 5 to the outer peripheral surface of the immersed nozzle 7 in the state that the immersed nozzle 7 is positioned at the center of the casting mold 5, and L1 shows the minimum distance from the inside surface of the casting mold 5 to the outer peripheral surface of the immersed nozzle 7 in casting. COPYRIGHT: (C)2008,JPO&INPIT
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