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The Kinetics of Oxidation of Molybdenite Concentrate by Water Vapor

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Abstract

A thermodynamic and kinetics investigation on the oxidation of MoS2 in molybdenite concentrate to MoO2 by water vapor was carried out as part of new process development. The kinetics of the reaction were determined by measuring the weight change of a sample with time in water vapor at temperatures between 700 °C and 1000 °C. The reaction rate followed the shrinking-unreacted-core model under chemical reaction control, which showed activation energy of 102 kJ/mol. In addition, the behavior of rhenium and selenium in molybdenum concentrate during the process was investigated. While most rhenium remained with the molybdenum dioxide during the water vapor oxidation, almost all selenium was volatilized in agreement with thermodynamic analysis.

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Acknowledgment

This work was supported by the United States Civilian Research and Development Foundation under Project No. AE2-2526-KA-03.

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Authors and Affiliations

  1. Department of Metallurgical Engineering, University of Utah, Salt Lake City, UT, 84112, USA

    Edgar Blanco (Graduate Student), Hong Yong Sohn (Professor) & Gilsoo Han (Postdoctoral Fellow)

  2. Navro Ltd., Kapan, Armenia, 377810

    Kliment Y. Hakobyan (Head, Principal Investigator)

Authors
  1. Edgar Blanco
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  2. Hong Yong Sohn
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  3. Gilsoo Han
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  4. Kliment Y. Hakobyan
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Corresponding author

Correspondence to Edgar Blanco.

Additional information

Manuscript submitted April 19, 2006.

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Blanco, E., Sohn, H.Y., Han, G. et al. The Kinetics of Oxidation of Molybdenite Concentrate by Water Vapor. Metall Mater Trans B 38, 689–693 (2007). https://doi.org/10.1007/s11663-006-9001-6

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  • DOI: https://doi.org/10.1007/s11663-006-9001-6

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