PURPOSE: To prevent contamination of molten steel with plugged sand packed into a molten steel discharging hole in order to prevent clogging of the molten steel discharging hole at the initial stage.
CONSTITUTION: At the time of starting pouring of the molten steel, the molten steel discharging hole in a ladle 1 on a swing tower 8 is closed after a lapse of the time of several sec after discharging the plugging sand by opening a sliding nozzle 3. At the same time, by supplying inert gas into the sliding nozzle 3, the molten steel in the molten steel discharging hole is stirred to prevent the clogging caused by solidification. After completing the pouring of molten steel in the ladle 1' at the pouring position, the swing tower 8 is swung and the ladle 1 at the waiting position is shifted to the pouring position to start the pouring.
SEKIGUCHI HIROSHI
MISAKI NORIO
YUHARA SUSUMU
MATSUKAWA TOSHITANE
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