CONTINUOUS CASTING METHOD FOR STEEL

摘要

PROBLEM TO BE SOLVED: To provide a continuous casting method for casting a clean steel reducing refractory material components invaded into molten steel by restraining the erosion of an immersion nozzle portion in contact with the molten steel and the erosion of an immersion nozzle portion in contact with mold powder and/or slag, in the continuous casting of the steel. SOLUTION: At the portion of the immersion nozzle in contact with the molten steel, spinel quality and/or spinel.carbon quality are disposed, and at the portion thereof in contact with the mold powder and/or the slag, powder line material is disposed. At the other portion, the immersion nozzle disposed with this body material and mold powder having <3 wt.% fluorine content and 4-100,000 poises viscosity at 1,300 deg.C are used in combination.