| 摘要 |
PURPOSE: A mold is provided which is fabricated in such a manner that upper part, lower part and central part of the mold have different thickness to easily move nonmetallic inclusions into the center of the mold and secure flotation time of residual refractories in tundish and inclusions in molten steel by maximizing initial rotary power. CONSTITUTION: In a mold installed at an inner part of tundish corresponding to an exit position of the ladle in a continuous casting machine comprising ladle, tundish and molten steel transferring and controlling unit, the mold is characterized in that the mold is constructed in a rectangular pipe form four sides of which are closed, and upper and lower sides are opened, metal case having a proper thickness is formed on a certain part of the lower and upper parts of the rectangular pipe, metal case having thinner thickness is formed on an intermediate part of the rectangular pipe compared with the upper and lower parts of the rectangular pipe, wherein metal case having different thickness per rotational direction of an entrance is formed on the intermediate part of the rectangular pipe in such a way that molten steel is flown in that direction as metal case of the thinnest one side of the intermediate part is melted down, and molten steel is flown in as metal cases of adjacent two sides of the intermediate part of the rectangular pipe are sequentially melted down in a certain direction at certain time intervals so that swirl is generated.
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