| 摘要 |
PROBLEM TO BE SOLVED: To provide a continuous casting method for molten metal capable of reducing nonmetallic inclusions and bubbles caught at the inside of a slab while improving the surface properties of the slab by electromagnetic force. SOLUTION: Alternating current is made to flow through an electromagnetic coil 4 arranged around a mold 1 so as to surround a casting 8; thus a meniscus shape is controlled so as to improve the surface properties of a slab. Meanwhile, the direction of the discharge port 6 in a dipping nozzle 5 is made upward, and further, a discharge flow 14 from the discharge port 6 is made to go to a direction upper than an intersection A between the short side of the mold 1 and the meniscus. In this way, nonmetallic inclusions and bubbles in the discharge flow are absorbed in the continuously cast powder in the meniscus 11 in a meniscus arrival part. Further, the discharge flow 14 receives electromagnetic force caused by the electromagnetic coil 4, the widening of the discharge flow in the thickness direction of the slab is suppressed, and the discharge flow 14 is not contacted with a long side shell 12; thus the capture of the nonmetallic inclusions and bubbles from the discharge flow 14 to the long side shell 12 can be suppressed as well. COPYRIGHT: (C)2008,JPO&INPIT
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