FLOW CONTROL APPARATUS FOR THIN SLAB CONTINUOUS CASTING AND CONTINUOUS CASTING METHOD FOR THIN SLAB

摘要

To provide a flow control apparatus for thin slab continuous casting and a continuous casting method for thin slab casting, by which electromagnetic stirring can be performed in a mold in the course of thin slab casting having a funnel mold, and cracking of a cast slab and the inclusion can be reduced in the vicinity of the surface of the cast slab.SOLUTION: The flow control apparatus includes a mold 1 for continuously casting a thin slab, an electromagnetic stirring device 3 for forming a swirling flow 7 in molten steel in the mold, and an electromagnetic brake 4 arranged below the electromagnetic stirring device 3 for applying DC magnetic field into the mold. The electromagnetic stirring device 3 and the electromagnetic brake 4 are fixed during casting. The electromagnetic stirring device 3 switches its current direction so that the direction of the swirling flow 7 is switched between a forward direction and a reverse direction. It is preferred to apply vibration stirring in which the absolute value of the flow rate on the front surface of the solidified shell periodically changes within 0.3 m/s.SELECTED DRAWING: Figure 2