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    • 8. 发明专利
    • NOZZLE FOR CONTINUOUS CASTING
    • JPH10296407A
    • 1998-11-10
    • JP12011897
    • 1997-04-24
    • TOSHIBA CERAMICS CO
    • HASEBE NOBUHIROFUSHIMI TETSUOMOCHIZUKI YOICHIROSUGIYAMA TOMOYUKITAKIGAWA HITOSHI
    • B22D41/50B22D11/10
    • PROBLEM TO BE SOLVED: To prevent generation of the negative pressure over the whole stepped part, to prevent generation of the swirl at the lower end of the step, and to prevent a nozzle from being clogged by the inclusions by providing a stepped part in an inner hole part of the nozzle, and blowing the reducing gas or the inert gas from a lower side of the stepped part. SOLUTION: A stepped part 7 to be swollen inwardly is provided in an inner hole part of a dipping nozzle 1. A gas blowing part 5 consisting of the porous material to pass the reducing gas or the inert gas is provided on a lower side of the stepped part 7. When the gas is injected from the lower side of the stepped part 7, clogging of the nozzle 1 mainly with the alumina oxide can be effectively prevented. No negative pressure is generated at the lower end of the stepped part 7, and no swirl is generated at the lower end of the stepped part 7. Abnormal discharge flow attributable to the stepped part 7 is eliminated, and the molten metal is poured into a mold in the contracted vein. When the lower side of the stepped part 7 is inclined upward, the wear, erosion, infiltration, etc., of the porous part can be reduced.