摘要 |
<P>PROBLEM TO BE SOLVED: To provide an immersion nozzle having improved durability, and to provide a continuous casting method including a preheating step of preheating the immersion nozzle. <P>SOLUTION: The immersion nozzle is used for the continuous casting method for molten metal and formed of a refractory containing one selected from among magnesia, spinel, dolomite clinker, a mixture of magnesia and spinel, and a mixture of magnesia and dolomite clinker, and containing free carbon. The immersion nozzle is preheated by high-frequency induction heating. <P>COPYRIGHT: (C)2008,JPO&INPIT |