The present invention relates to a device for preventing reflow of steel for inflow of tundish, in particular a sealing wool (4) is fitted to the coupling portion of the collector nozzle (1) and the shroud nozzle (5), the upper portion of the shroud nozzle (5) In the apparatus for preventing reoxidation of steel for inflow of tundish coupled with a sealing gas inlet cover 3 for injecting a sealing gas through the injection nozzle 6, the combustion gas inlet cover 8 is the sealing gas inlet cover 3. Is installed in the upper portion, a plurality of injection nozzles (9) are formed on the inner circumferential surface of the combustion gas injection cover 9, the combustion gas injection line 10 is coupled to one side of the outer circumferential surface of the combustion gas injection cover (9) It relates to a device for preventing reoxidation of inflow steel for tundish, characterized in that.
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