CASTING NOZZLE FOR TWIN BELT TYPE CONTINUOUS CASTER

摘要

PURPOSE: To restrain molten steel flow just below a nozzle in a mold, to uniformize flow speed of the molten steel in the width direction and to prevent the longitudinal crack in a cast strip by forming the discharging hole width in the thickness direction of the nozzle to a tapered shape gradually narrowed and the center inner part of the nozzle to the divided flow structure with a partitioned wall in the thickness direction of the nozzle. ;CONSTITUTION: On the upper surface of the nozzle, a sprue part 2 and a nozzle pouring hole 1 from a tundish are provided, and ordinarily, the tundish nozzle is fitted to the pouring hole 1 to pour the molten metal. A pouring part 3 in the nozzle body is divided with the partitioned wall 4 so as to inject the molten metal into the mold. Further, the lower end of the nozzle is formed as arc-state in the corner part 5, and the discharging hole 8 in the nozzle is formed as the tapered shape in the inner surface at the lower end part, and at the tip part 6 of the nozzle, the discharging hole having narrow width is formed. Such a nozzle forms the uniform molten steel flow pattern in molten steel flow speed, solidified shell thickness and solidified thickness, and the uniform shell is formed.;COPYRIGHT: (C)1994,JPO&Japio