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Thermodynamic Modelling of Molybdenite Roasting in a Multiple-Hearth Furnace

  • Thermodynamic Optimization of Critical Metals Processing and Recovery
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Abstract

A thermodynamic model was developed to study the roasting of molybdenite ore into molybdenum trioxide in a multiple-hearth furnace roaster. The model was developed using FactSage™, a software specializing in thermochemical simulations. The model assumes thermodynamic equilibrium between the solid and gaseous phases on each hearth. The results from the model were compared with operational data obtained from an earlier paper regarding molybdenite conversion at the then Climax Molybdenum Co. roaster in Langeloth, PA, USA. A good correlation has been observed between the conversion of molybdenum-containing species on each hearth and experimental data from the Climax roaster. The developed model also describes the behavior of some of the minor compounds typically present as impurities in molybdenite concentrates.

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Authors and Affiliations

  1. Onium Process Technology, Inc LLC, Lexington, MA, USA

    Leonid N. Shekhter, Nimit M. Shah & Larry F. McHugh

  2. J.E. Litz & Associates, Golden, CO, USA

    John E. Litz

Authors
  1. Leonid N. Shekhter
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  2. John E. Litz
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  3. Nimit M. Shah
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  4. Larry F. McHugh
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Correspondence to Nimit M. Shah.

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The authors whose names are listed immediately below certify that they have no affiliations with or involvement in any organization or entity with any financial interest (such as honoraria; educational grants, participation in speakers’ bureaus, membership, employment, consultancies, stock ownership, or other equity interest, or expert testimony or patent-licensing arrangements), or non-financial interest (such as personal or professional relationships, affiliations, knowledge, or beliefs) in the subject matter or materials discussed in this manuscript.

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Shekhter, L.N., Litz, J.E., Shah, N.M. et al. Thermodynamic Modelling of Molybdenite Roasting in a Multiple-Hearth Furnace. JOM 73, 873–880 (2021). https://doi.org/10.1007/s11837-020-04549-y

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  • DOI: https://doi.org/10.1007/s11837-020-04549-y

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