| 摘要 |
PROBLEM TO BE SOLVED: To provide a continuous casting method for a thin cast slab by which the erosion of an immersion nozzle in a mold can be restrained and the stable casting can be continued. SOLUTION: In the casting method, when the continuous casting is performed at 2.5-10 m/min casting speed by using a parallel-wall mold having 80-120 mm thickness at the outlet side, the immersion nozzle is cooled by blowing cooling gas onto the surface of the immersion nozzle at the upper position from the molten steel surface in the mold at 5-20 little/min flow rate, mold powder added onto the molten steel surface in the mold, is used as granule state or hollow granule state, and the average thickness of the unmelted mold powder layer is regulated to be 50-70 mm.
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