| 摘要 |
PROBLEM TO BE SOLVED: To efficiently float up and separate inclusion by using a tundish excellent in workability to refractory. SOLUTION: This casting method uses the tundish 10 having the fixed weirs 20 closing the bottom parts and dips and immersion tube 30 surrounding a long nozzle 1 on the molten steel surface at the upper part of the center between the fixed weirs. At this time, the inner diameter D and the dipping depth (h) of the immersion tube are regulated to the condition satisfying the inequalities. 0.70×L<=D<=1.30×L, 0.10×H<=h<=0.30×H. In the inequalities, D is the inner diameter of the immersion tube (mm), (h) is the dipping depth of the immersion tube (mm), L is the horizontal distance between the fixed weirs (mm) and H is the height from the bottom wall of the tundish to the top surface of the fixed weir (mm).
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