| 摘要 |
PURPOSE:To refine a molten steel in which phosphor content deviates to a higher value by an easy method, by putting an acid-coagulating agent, etc., into the limited position in a dipping tube dipped into a molten steel in a molten metal vessel so as to carry out dephosphorization, etc. CONSTITUTION:A dipping tube 3 is dipped into a molten steel 2 in the vicinity of gas coming up from an inert gas-blowing hole 5 provided to the bottom of a molten metal vessel 1. An metallic oxide agent 7 is added into the dipping tube 3 to carry out dephosphorization. Subsequently, metallic Al is successively put into the dipping pipe 3 and oxygen is blown through a lance 8 to elevate the temp. of the molten steel 2.
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