| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for refining a steel in a converter with which plastics are effectively utilized as a heat source by effectively conducting the combustion heat of the plastics into slag or molten iron in the converter. SOLUTION: In the refining method for charging mixture composed of the plastics (PL) and cooling material into the converter 1, a mixture A, in which the mass ratio of the PL in the mixture is adjusted so that the specific gravity of the mixture becomes the same as or higher than the specific gravity of the slag 12 and the mass ratio becomes higher than the mass ratio balancing the cooling effect with the cooling material and the temperature-rising effect with the combustion heat of the PL, and a mixture B, in which the mass ratio of the PL is adjusted so that this specific gravity becomes the same as or higher than the specific gravity of the slag and the mass ratio becomes lower than the mass ratio balancing the cooling effect with the cooling material and the temperature-rising effect with the combustion heat of the PL, and a mixture C, in which the mass ratio of the PL is adjusted so that this specific gravity becomes lower than the specific gravity of the slag, are prepared. The mixture A is used as the temperature-rising material and the mixture B or the mixture C are used as the cooling material. COPYRIGHT: (C)2006,JPO&NCIPI
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