| 摘要 |
PURPOSE:To stably obtain continuous casting without any slag inclusion by arranging flexible bellows surrounding a pouring nozzle between the lower end part of a tundish and the upper end part of a mold, and making the inner pressure of inert gas to the same pressure as a pouring head of molten metal. CONSTITUTION:The flexible bellows 12 having heat resistance and pressure tight, surrounding the pouring nozzle 2, of which the end part is inserted into the mold 3, is arranged between the lower face 11 of the tundish 1 and the upper end face 10 of the mold 3. The inert gas is introduced 15 and exhausted 16 into and from the bellows 12, to control this inner pressure 17 as equalizing to the molten metal head H0 detected by a molten metal height measuring instrument 18. The molten metal poured into the mold 3 from the nozzle 2 is stably pouring without any contacting with the oxidizing air and slag inclusion and so a billet 6 having good quality is produced.
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