| 摘要 |
PROBLEM TO BE SOLVED: To effectively cool a tuyere metallic material constituting a tuyere part with a little cooling gas flow rate, even in the case of the tubular part in the annular tuyere having a large inner diameter such as≥40 mm. SOLUTION: In the gas blowing tuyere for blowing the gas into a refining vessel, arranged in the refining vessel for refining molten metal, the bottom-blown tuyere 1 has a structure, in which the tip end part at the inner refining vessel side of the tuyere spouts the gas from a gap 6 between the tubular part 5 and the axial center part 2 arranged at the inside of the tubular part, and the inner diameter of the tubular part is≥40 mm, and the plurality of fine pipes 8 or a porous brick for flowing the cooling gas around the tubular part are arranged. COPYRIGHT: (C)2007,JPO&INPIT
|
