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| THE DESULFURIZATION AND MANGANESESULFUR EQUILIBRIA IN THE OPEN-HEARTH PROCESS |
| CHOU YUAN-HSI;MENG SHIEN-TZE;PAN HONG-FANG;WANG WEI-JI Institute of Metallurgy and Ceramics; Academia Sinica |
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Cite this article:
CHOU YUAN-HSI;MENG SHIEN-TZE;PAN HONG-FANG;WANG WEI-JI Institute of Metallurgy and Ceramics; Academia Sinica. THE DESULFURIZATION AND MANGANESESULFUR EQUILIBRIA IN THE OPEN-HEARTH PROCESS. Acta Metall Sin, 1957, 2(4): 321-333.
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Abstract Based on a family of (S)/[S] basicity curves of Chipman et al., a new basicityexpression for basic open-hearth slags has been evaluated and correlated with thesulfur-distribution ratio. Another method is to plot the sulfur-oxygen ratio (S)/[S][O]against Σα=N_(SiO_2)+4/3 N_(P_2O_5)+4/3 N_(Al_2O_3), a parameter suggested by the authors onthe basis of the ionic constitution of slags to replace the mole per cent SiO_2 used byChipman et al. A modified Turkdogan's method is also used for correlating works'desulfurization data, in which the ratio (S)/[S] (Σ Fe), called the sulfur-iron ratio bythe present authors, is plotted against the paramters (%SiO_2)+0.563 (%P_2O_5)+ 0.784 (%Al_2O_3), (%SiO_2)+0.5 (%P_2O_5)+0.2 (%Al_2O_3), (%SiO_2)+0.5 (%P_2O_5), orsimply (%SiO_2). It is found that all the three methods can be used with reasonablesuccess, although the last method is probably the simplest for practical slag-controlpurpose. Of the four parameters used in the last method, the second appears to bethe best. The manganese-sulfur equilibrium has been treated in a similar manner by plot-ting the manganese-sulfur ratio ((βMnO)(S))/([Mn][S]) against Σα. The curve obtained is similarto the sulfur-oxygen ratio curve of Chipman et al. This similarity suggests that ourmethod of treatment is sound and that the ratio (αMnO)/[Mn] is a correct measure of thedegree of oxidation of the bath as far as desulfurization is concerned. The sulfur-oxygen ratio curve of Chipman et al. has been extended to the regionof acid slags by incorporation of and data. The shape of thiscurve in the basic range is briefly discussed from an ionic point of view. Withcertain assumptions, we have also been able to estimate the concentration of (O~=)in silica-saturated 'FeO'—SiO_2 slags from the extension of the curve of Chipman et al.
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Received: 18 April 1957
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