| 摘要 |
<p>PURPOSE:To provide an RH degassing refining apparatus, in which the reflexing rate of molten steel is drastically increased and the removal effect of nonmetallic inclusion in the molten steel can drastically be improved by drastically reducing the flowing-in resistance of the molten metal from a ladle. CONSTITUTION:In an uptake immersion tube in the RH degassing refining apparatus for blowing up the molten steel by inserting gaseous argon, an expanding part 11 for immersing the tip part into the molten steel and expanding the inner diameter at a part of the lower end 10 downward, is formed.</p> |
