| 摘要 |
PROBLEM TO BE SOLVED: To provide a desulfurization method which inhibits desulfurization slag from intruding into a molten pig iron and the dispersion state from aggravating, even if the desulfurization slag adheres to an impeller, and thereby keeps desulfurization efficiency high, and to provide a desulfurization device. SOLUTION: The method for desulfurizing the molten pig iron comprises charging the molten pig iron into a vessel, adding a desulfurizing agent, at the same time immersing and rotating an impeller having two or more blades in the molten pig iron, and stirring the molten pig iron to desulfurize it, wherein the impeller used for stirring the molten pig iron is provided with the blades having such a difference of elevation that the height of the upper end of the blade alternately increases or decreases. The desulfurization device employs the impeller. COPYRIGHT: (C)2004,JPO&NCIPI
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