| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent clogging by non-metallic inclusions, and to maintain the effect even after the lapse of the casting time. <P>SOLUTION: The immersion nozzle is used when the downward flow flowing down in the inside of a nozzle body 1 is the swirling flow. In addition to a pair of side surface holes 2 provided on an outer peripheral part 1b in the vicinity of a bottom part 1a of the nozzle body 1, a bottom hole 3 is provided on the bottom part 1a, and a number of holes existing in an optional cross section of the nozzle body in a part having the side surface hole 2 is two. The immersion nozzle is used, and molten metal is supplied from the immersion nozzle into a mold at a flow rate Q of 20-80 m<SP POS="POST">3</SP>/hr. Even when the flow rate for supplying the molten metal is large, the flow in the mold can be kept calm, and continuous casting can be performed, and problems such as the defect in catching of mold powder or remelting of a solidified shell can be improved. <P>COPYRIGHT: (C)2012,JPO&INPIT |
