| 摘要 |
PURPOSE:To stabilize the end part shape of casting slab and to prevent the end part from molten steel spout-out by changing rolling reduction rate of roll in accordance with fluctuation of static iron pressure in the inner part of a casting slab at the end period of continuous casting. CONSTITUTION:The molten phase 8 in the casting slab 5, in which the solidification progresses at the end period of the casting, in the continuous casting of molten steel to reduce the static iron pressure. The rolling reduction force F of the roll 4 supporting the casting slab 5 is gradually changed through the hydraulic pressure P2 of a cylinder 6 corresponding to this static iron pressure and the detection of the casting slab position in the continuous caster. In this way, the casting is finished as keeping to stabilize the end part shape of the casting slab 5, and the break-down of the roll, caused by bleed, etc., of the molten steel is prevented.
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