Method for controlling flow of molten steel in mold, and method for producing continuously cast product

摘要

There is disclosed herein a method for controlling a flow of a molten steel in a mold by applying a shifting magnetic field to the molten steel in a slab continuous casting machine, characterized by comprising: applying a shifting magnetic field to impart a braking force to a discharge flow from an immersion nozzle when a molten-steel flow velocity on a molten steel bath surface is higher than an optimal flow velocity value at which mold-powder entrainment is minimized and inclusion adherence to a solidifying shell is minimized; and applying a shifting magnetic field to rotate the molten steel in a horizontal direction when the molten-steel flow velocity on the molten steel bath surface is lower than the optimal flow velocity value.