STOPPER AND STOPPER ASSEMBLY

摘要

PURPOSE: A stopper and a stopper assembly are provided to prevent inclusion from being attached to the inner wall of the submerged nozzle and a stopper head unit and the side of the stopper head by reducing pressure around the stopper head unit. CONSTITUTION: A stopper(200) comprises the molten steel outlet of a tundish(100) and includes an inner hollow(210). The stopper is extended in the longitudinal direction, wherein a head unit larger than the size of a molten steel outlet is formed at the end of the stopper. Multi-stage argon outlets are vertically formed on the head unit. The multi-stage argon outlets are formed to cross each other. The stopper assembly comprises a stopper and a bubble activator(120). The bubble activator surrounds the molten steel outlet and is projected upward.