| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of efficient dephosphorization of molten iron by accelerating dephosphorization reaction while assuring a high Mn yield. SOLUTION: The method in which a smelting agent consisting mainly of a CaO source and an oxygen source are added to the molten iron to conduct the dephosphorization treatment. In the method, the molten iron is dephosphorized so that the slag after the treatment has a basicity of 2.2-3.5, excluding 2.2, and a total iron concentration of 10-30 mass% and that the final treatment temperature of the molten iron is 1,320°C or higher. Thus, the dephosphorization can be accelerated while ensuring the high manganese yield and the molten iron can be efficiently dephosphorized. COPYRIGHT: (C)2008,JPO&INPIT
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