Sulfur Transfer at Slag/Metal Interface-Impact of Oxygen Potential
2012 (English)In: Metallurgical and materials transactions. B, process metallurgy and materials processing science, ISSN 1073-5615, E-ISSN 1543-1916, Vol. 43, no 2, 363-369 p.Article in journal (Refereed) Published
In the present work, the interfacial movement resulting from sulfur mass transfer at the slag/metal interface was monitored by X-ray sessile drop method in dynamic mode at temperature 1873 K (1600 A degrees C) under nonequilibrium conditions. The experiments were carried out with pure iron and CaO-SiO2-Al2O3-FeO slag (alumina saturated at the experimental temperature) contained in alumina crucibles with well-controlled partial pressures of oxygen and sulfur. The impact of oxygen potential on the droplet oscillation as sulfur from the gas phase reaches the metal drop through the intermediate slag phase was monitored. The interfacial velocity was investigated. It was found that the increases of interfacial velocity and the maximum oscillation time were mainly attributed to the partial pressure of oxygen increases. The experiment results were explained by previous ab initio calculations. The thermo-physical and thermo-chemical properties of slag were also found to influence interfacial velocity.
Place, publisher, year, edition, pages
2012. Vol. 43, no 2, 363-369 p.
Metallurgy and Metallic Materials
IdentifiersURN: urn:nbn:se:kth:diva-26342DOI: 10.1007/s11663-011-9602-6ISI: 000301778200015ScopusID: 2-s2.0-84861817169OAI: oai:DiVA.org:kth-26342DiVA: diva2:371885
FunderSwedish Research Council
QC 20101123. Updated from submitted to published 201204242010-11-232010-11-232012-04-24Bibliographically approved