| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for treating molten pig iron containing little Si at high efficiency and high productivity with the use of a small amount of an auxiliary material, and for solving problems that refractory wears, that refining capability is reduced, that slopping occurs and that CaO does not form adequate slag. SOLUTION: The refining method having high reaction efficiency includes adding a refining agent mainly containing CaO and Fe<SB>t</SB>O and containing a compound of CaO and Fe<SB>t</SB>O at least in one part, and blowing oxygen gas, when refining molten pig iron containing 0.20 mass% or less Si in a treatment furnace, wherein the refining agent contains 5 mass% or more of a CaO-Fe<SB>2</SB>O<SB>3</SB>phase and 20 mass% or more of a CaO component at room temperature before being added to the treatment furnace. COPYRIGHT: (C)2006,JPO&NCIPI
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