| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for refining molten steel containing chromium with which chromic acid contained in decarburized slag is reduced in a short time and the loss by oxidation of the chromium is reduced and the wear of refractory in a refining furnace can be restrained. SOLUTION: In the refining method of the molten steel, with which the decarburized slag 8 produced in the case of executing the decarburized refining of molten iron 6 in the refining furnace 1, is left in the refining furnace 1 and the molten steel 7 is tapped and the molten iron 11 is charged into the refining furnace 1, and only decraburized slag 8 is tapped after recovering the chromium contained in the decarburized slag 8 into the molten iron 11 by blowing oxygen, and successively, the decarburized refining is executed to the molten iron 11, the oxygen blowing speed is dropped after blowing the oxygen at 60 to 80% of the total oxygen blowing quantity.
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