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Evaluating the Diffusion Coefficient of Sulfur in Low-Silica CaO-SiO2-Al2O3 Slag
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering.
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering.
2011 (English)In: Metallurgical and materials transactions. B, process metallurgy and materials processing science, ISSN 1073-5615, E-ISSN 1543-1916, Vol. 42, no 2, 274-280 p.Article in journal (Refereed) Published
Abstract [en]

The chemical diffusion coefficient of sulfur in the ternary slag of composition 51.5 pct CaO-9.6 pct SiO2-38.9 pct Al2O3 slag was measured at 1680 K, 1700 K, and 1723 K (1403 degrees C, 1427 degrees C, and 1450 degrees C) using the experimental method proposed earlier by the authors. The P-S2 and P-O2 pressures were calculated from the Gibbs energy of the equilibrium reaction between CaO in the slag and solid CaS. The density of the slag was obtained from earlier experiments. Initially, the order of magnitude for the diffusion coefficient was taken from the works of Saito and Kawai but later was modified so that the concentration curve for sulfur obtained from the program was in good fit with the experimental results. The diffusion coefficient of sulfur in 51.5 pct CaO-9.6 pct SiO2-38.9 pct Al2O3 slag was estimated to be in the range 3.98 to 4.14 x 10(-6) cm(2)/s for the temperature range 1680 K to 1723 K (1403 degrees C to 1450 degrees C), which is in good agreement with the results available in literature.

Place, publisher, year, edition, pages
2011. Vol. 42, no 2, 274-280 p.
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:kth:diva-34367DOI: 10.1007/s11663-011-9492-7ISI: 000290688100004Scopus ID: 2-s2.0-79953034864OAI: oai:DiVA.org:kth-34367DiVA: diva2:422961
Funder
Swedish Research Council, H 6971
Note
QC 20110614Available from: 2011-06-14 Created: 2011-06-07 Last updated: 2011-11-14Bibliographically approved

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