Abstract
The investigations of vanadium vaporization from CaO-SiO2-FeO-V2O5 thin film slags were conducted using the single hot thermocouple technique (SHTT) with air as the oxidizing atmosphere. The slag samples were analyzed after the experiments by SEM/EDX. The vanadium content was found to decrease as a function of time. The loss of vanadium from the slag film after 30 minutes of oxidation was approximately 18 pct and after 50 minutes, it was nearly 56 pct. The possible mechanism of vanadium loss would be the surface oxidation of vanadium oxide in the slag, VO x to V5+, followed by surface evaporation of V2O5, which has a high vapor pressure at the experimental temperature.
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The authors are thankful to TU-Bergakademie, Freiberg, Germany, for making the experimental facilities available. Financial support to Ms. Shyrokykh by the Ministry of Education, Sports and Youth of Ukraine is gratefully acknowledged. We thank the German Research Council for the award of the Mercator visiting professorship to Seshadri Seetharaman at TU-Bergakademie, Freiberg, Germany. The financial support from the Division of Materials Process Science at the Royal institute of Technology, Stockholm, with respect to the materials costs is acknowledged. The work has been carried out as part of the Swedish national project “Eco-steelmaking” financed by The Swedish Foundation for Strategic Environmental Research, MISTRA through Jernkontoret.
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Manuscript submitted January 19, 2013.
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Seetharaman, S., Shyrokykh, T., Schröder, C. et al. Vaporization Studies from Slag Surfaces Using a Thin Film Technique. Metall Mater Trans B 44, 783–788 (2013). https://doi.org/10.1007/s11663-013-9865-1
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DOI: https://doi.org/10.1007/s11663-013-9865-1