| 摘要 |
PROBLEM TO BE SOLVED: To improve the natural hole opening ratio of a steel discharging hole by reducing bearing force of a sintered layer to the static pressure of the molten steel and also, to stabilize the quality of a cast slab by improving the cleanliness of the molten steel. SOLUTION: In a method for plugging the steel discharging hole 1 by filling plugging sand 3 into the steel discharging hole 1 arranged at the bottom part of a ladle, a recessed part 5 is formed on the upper surface of the plugging sand 3 filled into the steel discharging hole 1.
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