| 摘要 |
PROBLEM TO BE SOLVED: To provide a continuous casting method with which a cast slab having no entrapment of mold powder and only a little fine inclusion caught to solidified shell can be cast. SOLUTION: When the continuous casting is performed by generating a magnetic field with a magnetic field generating unit set at the back surface of the mold and controlling the fluidity of molten steel poured into the mold with this magnetic field; upper and lower two steps of the magnetic field generating unit of the upper part magnetic field generating apparatus 3 set at the position of a spouting hole 7 of an immersion nozzle 2 and the lower part magnetic field generating apparatus 4 set at the lower part of the spouting hole of the immersion nozzle are set. Then, from the upper part magnetic field generating apparatus, a moving magnetic field is impressed and from the lower part magnetic field generating apparatus, a static magnetic field is impressed; and when the molten steel flowing speed just below the molten steel surface at the position near the short wall side of the mold in 1/4 mold width, is shown with the positive to the molten steel flow toward the immersion nozzle from the short wall side of the mold, and shown with the negative to the molten steel flow toward the short wall side of the mold from the immersion nozzle; this flowing speed is kept into the range of from -0.07m/sec to 0.05m/sec. COPYRIGHT: (C)2006,JPO&NCIPI
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