| 摘要 |
PURPOSE:To prevent the solidifying and clogging in the nozzle of a tundish which charges molten steel into a casting mold in the stage of casting continuously a steel plate having a thin wall thickness by forming a broad part in the upper part of the casting mold, forming a molten slag layer on the top surface of the molten steel in the casting mold and heating electrically said layer. CONSTITUTION:The molten steel 2 in a tundish 1 is charged with a nozzle 3 into a casting mold 4 for continuous casting and a steel plate 5 having a thin wall thickness of <=50mm. is continuously cast. A broad part 4C is provided in the upper part of the mold 4 in this case, and a molten slag bath 10 is put thereon. A non-consumable electrode 7 made of high m.p. metal such as W, Ta or the like is dipped therein and electricity is conducted between the electrode and a continuous casting ingot 5 with an electric power source 8 to heat electrically the molten slag 10. The molten steel in the mold 4 is heated by the slag 10 of a high temp., whereby the solidifying of the molten steel owing to a small rate of drawing of the steel plate 5 as a continuous casting ingot and the solidifying and clogging of the molten steel 3 in the nozzle of the tundish 2 are prevented and the continuous casting of the thin steel plate is accomplished stably. |
