| 摘要 |
A tundish submerged nozzle for more accurately controlling a flow amount of molten steel discharged from a tundish using a stopper during continuous casting is provided. As a tundish submerged nozzle installed on the bottom of a tundish(20), the tundish submerged nozzle comprises: a nozzle in which a passage is formed such that an orifice(32) whose inner diameter(D32) is gradually reduced is formed in the passage; and a stopper(50) comprising a stopper rod which is spaced from or closely adhered to an upper part of the orifice within the passage of the nozzle to open or close the nozzle, and has an outer diameter smaller than an inner diameter of an upper part of the nozzle, and of which at least a portion is disposed within the passage of the nozzle, and a stopper head(54) formed on a lower end of the stopper rod such that the stopper head is spaced from or closely adhered to the upper part of the orifice, wherein a distance from the top of the nozzle to the orifice is longer than thickness of the tundish bottom. The nozzle comprises an upper nozzle(30) formed such that the upper nozzle penetrates the tundish bottom, and a lower nozzle(40) adhered onto a lower end of the upper nozzle.
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