NOZZLE FOR CONTINUOUS CASTING

PURPOSE:To reduce the solidification and sticking of molten steel and to prevent the development of crack or breakage even in case the steel is sticked by forming a foaming body layer having excellent heat insulating and cushion properties on whole face of inner hole in a nozzle for the nozzle body made of refractory. CONSTITUTION:In order to prevent the corrosion by slag, the outer surface of nozzle body 1 is constituted by a slag-line member 4 and heat-insulating material 5 covering on it. Further, the foaming body layer 3 having excellent heat insulating and cushion properties is formed on the whole face of inner hole 2 in the nozzle. In this result, by the heat insulating property, the heat radiation quantity of molten steel through the nozzle body is reduced and the solidification and sticking quantities of molten steel are reduced. Further, by the cushion property, even in case the steel is sticked by the solidification of molten steel, as the heat expansion is absorbed, the development of crack or breakage of nozzle body 1 is prevented.