processo de fundição contínuo

摘要

An immersion nozzle that attains an enhancement of durability; and a method of continuous casting including the step of preheating the immersion nozzle. The immersion nozzle is one for use in a method of continuous casting for molten metal, characterized in that it consists of a refractory containing free carbon and any of magnesia, spinel, dolomite clinker, magnesia/spinel mixture and magnesia/ dolomite clinker mixture, and that it is preheated by high-frequency induction heating.