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An Insight into Slag Structure from Sulphide Capacities
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Materials Process Science.
2012 (English)In: Metallurgical and materials transactions. B, process metallurgy and materials processing science, ISSN 1073-5615, E-ISSN 1543-1916, Vol. 43, no 6, 1338-1343 p.Article in journal (Refereed) Published
Abstract [en]

The molar sulphide capacities = (mol pct S) ()(1/2) on four binary systems, MgO-SiO2, CaO-SiO2, MnO-SiO2 and FeO-SiO2 are elucidated so as to compare the magnitudes of the basicities of four metallic oxides and to estimate the temperature dependencies of the basicities of metallic oxides. The enthalpy changes of the reaction 2O(-) = O + O2-, viz. the silicate polymerization reaction (denoted as ) have been calculated from the slopes of the log vs 1/T curves for four binary silicates. The value is considered in the present work to be an index of the basicity of silicate melts. The basicities obtained on the basis of the values are in the order MgO < CaO < MnO < FeO, which are determined by two effects; (i) ionicity of chemical bonds between metallic and oxygen ions and (ii) clustering of metallic oxides in silicates. It is also found that the basicity of the FeO-SiO2 system is larger at higher temperatures.

Place, publisher, year, edition, pages
2012. Vol. 43, no 6, 1338-1343 p.
Keyword [en]
Cao-Al2o3-Sio2 Slags, Silicate, Melts
National Category
Metallurgy and Metallic Materials
URN: urn:nbn:se:kth:diva-110066DOI: 10.1007/s11663-012-9713-8ISI: 000312342900013OAI: diva2:585549

QC 20130110

Available from: 2013-01-10 Created: 2013-01-10 Last updated: 2013-01-10Bibliographically approved

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Seetharaman, Seshadri
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