| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method for treating molten iron having good thermal efficiency with which melting quantity of iron scraps can be made more than that of the conventional method, when molten steel is produced by applying each molten iron pre-treatment of desiliconizing treatment, dephosphorizing treatment and desulfurizing treatment to the molten iron tapped off from a blast furnace. <P>SOLUTION: The iron scraps 7 are beforehand charged into a molten iron carrying vessel 1 of empty after discharging the molten iron, and the molten iron 5 tapped off from the blast furnace, is received with this molten iron carrying vessel, and after receiving the molten iron, only oxygen gas or oxygen-containing gas is supplied, and silicon concentration in the molten steel at the completing time of the desiliconizing treatment, is made to be in the range of≥0.10 mass% to apply the desiliconizing treatment. In this case, it is desirable to make slag generated by the desiliconizing treatment flow-out from the molten iron carrying vessel by tilting the molten iron carrying vessel during desiliconizing treatment. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
