CONTINUOUS CASTING NOZZLE OF STEEL

摘要

PROBLEM TO BE SOLVED: To prevent a blockade of a continuous casting nozzle such as a dipping nozzle or a shooting nozzle due to adhesion of aluminum by containing a natural alumina system material into a refractory material which constitutes at least one part of portions contacting with a nozzle inner hole part or a molten steel. SOLUTION: It is desirable that a part or all of natural alumina system material is one kind or more than two kinds chosen from a group of alum shale, bauxite and its baking respectively. For forming a reaction phase portion containing an Al-Fe-O system compound or an Al-Si-O system compound or the like at portions contacting with a molten steel of the casting nozzle, a natural aluminum system material is used as a refractory material to constitute portions contacting with a molten steel of the casting nozzle. Synergy operation of aluminum adhesion prevention effect arising from an aluminum high corrosion resistance and a reaction phase being composed of the Al-Fe-O system compound or the like to be formed with impurity material is thus obtained.