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Studies of dynamic mass transfer at the slag-metal interface - Interfacial velocity measurements
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Materials Process Science.
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Materials Process Science.
2012 (English)In: International Journal of Materials Research - Zeitschrift für Metallkunde, ISSN 1862-5282, E-ISSN 2195-8556, Vol. 103, no 7, 875-883 p.Article in journal (Refereed) Published
Abstract [en]

The dynamics of oxygen transport along the slag-metal interface of pure iron and alumina-saturated CaO-Al2O3-SiO2 slag was studied using high-temperature X-ray image analysis. The oscillations of the metal drop occurring due to the interfacial movement of oxygen atoms driven by Marangoni forces were studied in detail. The change in interfacial area during the oscillations was measured using a digitizing software and MATLAB. It was observed that the interfacial velocity as a function of oxygen exhibits insignificant variation with temperature. Further, the values obtained for the interfacial velocity using oxygen concentration difference at the interface were slightly lower in comparison to those using sulfur. The possible reason for this lower velocity could be that, although oxygen is a smaller atom compared to that of sulfur, the energy barrier at the free iron surface is higher for oxygen, thus hindering its motion along the interface.

Place, publisher, year, edition, pages
2012. Vol. 103, no 7, 875-883 p.
Keyword [en]
Interfacial phenomena, Interfacial velocity, Oxygen, Interfacial tension
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:kth:diva-104265DOI: 10.3139/146.110705ISI: 000307328700011Scopus ID: 2-s2.0-84863961443OAI: oai:DiVA.org:kth-104265DiVA: diva2:563726
Funder
Swedish Research Council, H 6971
Note

QC 20121031

Available from: 2012-10-31 Created: 2012-10-31 Last updated: 2017-12-07Bibliographically approved

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