<報文>高炉系スラグによる炭素飽和溶鉄の脱硫について

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The rate of desulfurization of carbon saturated iron by blast furnace type slag was investigated in a graphite crucible at 1450°-1600℃ ; also the experimental results were interpreted by electrochemical method considering polarization curves. The results obtained are as follows : 1) The rate coefficient Km of desulfurization is propotional to activity of lime in the slag. 2) The apparent activation energy of desulfurization is about 60 Kcal/mol, and there were no differences due to the variation of slag composition so far as the limits of experimental error is concerned. 3) The rates of silica reduction from acidic slag by carbon saturated iron containing sulfur are almost same with that by sulfur-free carbon saturated iron. On the other hand, the rates of silica reduction from basic slag by carbon saturated iron containing sulfur are remarkably different from that by sulfur-free carbon saturated iron. 4) The profile of FeO concentration in slag as a function of time was able to rearrange in the regular pattern by the coordinate of C_<FeO> (g/cm^2) and (S)/S. 5) The phenomena that the rate of desulfurization is accelerated by the addition of Al to the metal are explainable from the facts that the transfer of Al from slag to the metal is added to CO evolution as anodic reaction. 6) The controlling step of desulfurization of carbon saturated iron by blast furnace type slag is anodic reaction of CO evolution, but it changes to transport process of sulfur in slag with the increased addition of Si and Al to the metal.
東北大学の論文
1976-03-30

<報文>高炉系スラグによる炭素飽和溶鉄の脱硫について

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