| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a steelmaking method, with which converter slag after executing decarburizing treatment is left in the converter and the slag can efficiently be reused to converter dephosphorizing treatment in the following charge, continuously executing the dephosphorizing treatment, tapping, recharging and decarburizing treatment in the same converter. SOLUTION: Firstly in the converter 1, the dephosphorizing treatment is mainly executed, and thereafter the molten steel in the converter is tapped into a molten steel receiving ladle 2 and successively, after tapping the molten steel, the dephosphorized slag in the converter is tapped into a slag tapping pot 3 and the molten steel tapped into the molten steel receiving ladle is charged into the converter again, and the decarburize-refining is mainly executed. Then, after tapping the decarburized molten steel, the decarburized slag is left in the converter and auxiliary material containing one or more kinds among fluorite, Al ash and boron oxide are charged into the residual decarburized slag and used for the dephosphorize-refining in the following charge.</p> |
