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Evaluation of thermodynamic activity of a metallic oxide in a ternary slag from the sulphide capacity of the slag
KTH, Superseded Departments, Materials Science and Engineering.
KTH, Superseded Departments, Materials Science and Engineering.
2004 (English)In: ISIJ International, ISSN 0915-1559, E-ISSN 1347-5460, Vol. 44, no 11, 1783-1786 p.Article in journal (Refereed) Published
Abstract [en]

The correlation between the activity of a metallic oxide in a ternary slag system and the sulphide capacity of the slag was investigated. The solubility of sulphur in the binary systems CaO-SiO2 and Al2O3-CaO along with its sulphide capacity of the Al2O3-CaO-SiO2 system respectively have been used to estimate the activities of CaO at the compositions of some Al2O3-CaO-SiO2 intermediate compounds. Estimation has been carried out assuming that the Gibbs free energy of fusion for the ternary composition is additive of those for pure substances. The estimated values of the activities are in good agreement with the measured values. This correlation is not only used to evaluate the activity but also, by comparing the estimated activities with the measured ones, it is possible to elucidate the applicability of Henry's law to the activity of a metallic sulphide and to determine the order in the affinity of a cation to sulphur between two metallic oxides in a slag.

Place, publisher, year, edition, pages
2004. Vol. 44, no 11, 1783-1786 p.
Keyword [en]
activity, sulphide capacity, sulphur solubility, slag
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:kth:diva-47391DOI: 10.2355/isijinternational.44.1783ISI: 000225227600001Scopus ID: 2-s2.0-11144225768OAI: oai:DiVA.org:kth-47391DiVA: diva2:455186
Note
QC 20111109Available from: 2011-11-09 Created: 2011-11-08 Last updated: 2017-12-08Bibliographically approved

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