Apparatus for decreasing defect of strip and method for decreasing defect of strip using the same

摘要

This invention relates to cast defect reduction apparatus and method. In particular, to minimize the mixing of the injected gas to the molten steel in the continuous casting mold of the cast defect reduction method using cast steel brake defect reduction apparatus and which can reduce the occurrence of this out. Cast defect reduction apparatus and the molten steel and the mold cover flux covering the open top of the mold to be injected, inert gas into the headspace of the molten steel in the interior of the mold is closed by the mold lid in accordance with one embodiment of the present invention a feeder for feeding the gas and dried, comprising the inert gas to circulate the gas mixture filled in the upper space of the molten steel and a dehumidifier to control the humidity of the mixed gas. In addition, the cast defect reduction method according to an embodiment of the present invention includes the steps of blocking the open top of the mold in the mold cover, the closed mold and injecting the molten steel on the inside, the input flux at the upper portion of the molten steel and a step, and the step of supplying an inert gas is dried in the mold with an upper space of the molten steel, including the inert gas by circulating the mixed gas filled in the upper space of the molten steel to lower the humidity of the phase of the mixed gas contains. ;