Sulfide Capacity in Ladle Slag at Steelmaking Temperatures
2015 (English)In: Metallurgical and materials transactions. B, process metallurgy and materials processing science, ISSN 1073-5615, E-ISSN 1543-1916, Vol. 46, no 6, 2609-2615 p.Article in journal (Refereed) PublishedText
Sulfide capacity measurements were conducted at 1823 K and 1873 K (1550 degrees C and 1600 degrees C) for the quaternary Al2O3-CaO-MgO-SiO2 system, for typical compositions used in the ladle in steelmaking. A copper-slag equilibrium was used under controlled oxygen and sulfur potentials. The sulfide capacity is strongly dependent on the composition and it was found to increase with the basic oxides, while it decreases with increase of the acidic components. It was found that CaO is more effective in holding sulfur in the slag compared to MgO when replacing SiO2. For the present slag compositions, Al2O3 and SiO2 behaved similar with respect to sulfur, and no considerable effect could be recorded when replacing one for the other. The sulfide capacity was also found to be strongly dependent on the temperature, increasing with temperature. The present results were compared with industrial data from the ladle, after vacuum treatment, and they were in good agreement.
Place, publisher, year, edition, pages
Springer, 2015. Vol. 46, no 6, 2609-2615 p.
SILICATE MELTS, CAO-AL2O3-SIO2 SLAGS
Metallurgy and Metallic Materials
IdentifiersURN: urn:nbn:se:kth:diva-180619DOI: 10.1007/s11663-015-0444-5ISI: 000367067600023ScopusID: 2-s2.0-84946489157OAI: oai:DiVA.org:kth-180619DiVA: diva2:896102
QC 201601202016-01-202016-01-192016-02-29Bibliographically approved