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Phase transformations during heating of llmenite concentrates

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Abstract

llmenite concentrates were heated in argon and oxygen in the temperature range 700 °C to 1000 °C to study the behavior of the pseudorutile phase and other changes which occur. Pseudorutile does not persist in argon or oxygen in the temperature range studied. In argon at 700 °C, pseudorutile decomposes into hematite and rutile, while at 1000 °C, it combines with ilmenite to form ferrous-ferritic pseudobrookite solid solution. A new phase “Fe2O3-2TiO2” was identified as an intermediate product during the heating of ilmenite or pseudorutile in oxygen. This compound decomposes into hematite and rutile below 800 °C and to pseudobrookite and rutile above 800 °C. The sequence of reactions during the heating of ilmenite and pseudorutile in oxygen is proposed.

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Authors and Affiliations

  1. G.K. Williams Cooperative Research Center for Extractive Metallurgy, Department of Chemical Engineering, Melbourne University, 3052, Parkville, Victoria, Australia

    Suresh K. Gupta (NERDDC Research Fellow)

  2. Division of Mineral and Process Engineering, Commonwealth Scientific and Industrial Research Organization, 3168, Clayton, Victoria, Australia

    V. Rajakumar (Principal Research Scientist)

  3. Department of Materials, Imperial College of Science, Technology and Medicine, 2BP, London, SW7, UK

    Paul Grieveson (Professor of Applied Metallurgy)

Authors
  1. Suresh K. Gupta
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  2. V. Rajakumar
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  3. Paul Grieveson
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Formerly with the Department of Metallurgy, Imperial College of Science, Technology and Medicine, London.

Formerly with the Department of Metallurgy, Imperial College of Science, Technology and Medicine, London.

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Gupta, S.K., Rajakumar, V. & Grieveson, P. Phase transformations during heating of llmenite concentrates. Metall Trans B 22, 711–716 (1991). https://doi.org/10.1007/BF02679027

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  • DOI: https://doi.org/10.1007/BF02679027

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