Abstract
In the present study, the applicability of the high-temperature mass spectrometric method combined with Knudsen effusion cell for quantifying the valence states of V in the multicomponent system CaO-MgO-Al2O3-SiO2-VO x up to a maximum temperature of 2050 K (1777 °C) was examined. The valence ratio of V3+/V4+ in slag phase was derived from the partial pressures of VO and VO2 in the effused vapor phase. The results show good agreement with the literature values obtained by other techniques. A correlation between the valence ratio V3+/V4+ and the oxygen partial pressure as well as basicity was achieved based on the present results and accessed data in the literature. The results of the present study demonstrate that the Knudsen cell-mass spectrometric method can be a very effective tool in estimating the valence ratios for of transition metals in metallurgical slags.
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Acknowledgments
Financial support for this study was received from the National Nature Science Foundation of China (Nos. 51104013, 51174022), and the Swedish Foundation for Strategic Environmental Research (MISTRA) via Swedish Steel Producers Association (Jernkontoret) under the Eco steel Production program. The supports from these agencies are gratefully acknowledged. The authors express their sincere thanks to Dr. Haijuan Wang for providing the high-temperature mass spectrometry data for the current study.
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Manuscript submitted August 28, 2012.
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Wang, L., Teng, L., Chou, KC. et al. Determination of Vanadium Valence State in CaO-MgO-Al2O3-SiO2 System By High-Temperature Mass Spectrometry. Metall Mater Trans B 44, 948–953 (2013). https://doi.org/10.1007/s11663-013-9836-6
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DOI: https://doi.org/10.1007/s11663-013-9836-6