| 摘要 |
PURPOSE:To float and separate safely and efficiently nonmetallic inclusions without leakage of steel by providing a gas pool in the bottom of a tundish, and providing plural pieces of small diameter porous plugs on the concentric circle centering the gas pool. CONSTITUTION:A gas pool 20 formed of a gas pool shell 18 is provided between the refractories 6 in the bottom of a tundish and a coalting material 8 thereof. Plural pieces of small diameter plugs 22 for blowing gas are disposed on the circumference of the concentric circle centering on the pool 20. A gas supply pipe 26 for supplying gas to the pool 20 is disposed along the refractories 6 from above the tundish. The top end of the pipe 26 is bent downward to prevent the direct contact of the gas with the plugs 22. The circumferences of the pool 20, the plugs 22, the pipe 26, etc. are embedded in castable refractories 28 except the top surface for blowing. |
