LADLE FOR REFINING MOLTEN STEEL AND METHOD FOR REFINING MOLTEN STEEL

摘要

PROBLEM TO BE SOLVED: To provide a ladle for refining a molten steel, which has a plug for blowing a gas for stirring at the bottom and can markedly enhance a stirring power compared to a conventional ladle, and to provide a method for refining the molten steel by using the ladle for refining the molten steel and strongly stirring the molten steel therein.;SOLUTION: The ladle 1 for refining the molten steel has two or more blowing plugs 4 for blowing the gas in the bottom. When an inner diameter of a side wall in the bottom of the ladle is defined as D, at which the blowing plug is installed, a distance between the centers of the adjacent blowing plugs is D/6 to D/4. The method for refining the molten steel includes stirring the molten steel 5 accommodated in the ladle under a stirring condition that the power density ε for stirring the molten steel calculated by the expression of ε=(0.0285×Q_Ar×T/W_m)×log[1+(760×H)/(148×P)] is 1,000 W/ton or more.;COPYRIGHT: (C)2010,JPO&INPIT