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Thermal Transformation of Oxide and Hydroxide Minerals in Chromite and Manganese Ores

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Abstract

Steelmaking industries consume the majority of chromium and manganese ferroalloys to impart several properties in steel and also for other purposes. The quality of ore governs the process kinetics as well as the process economy of the ferroalloy industry. The present study demonstrates the thermal transformation behavior of chromite and manganese ores with varying compositions. Simultaneous thermal analysis (DTA/TG) is employed for such ore samples where the transformation of mineral phases is correlated with the thermogram characteristics and quantified. Phase, microstructure, and compositional analysis results of individual ores corroborated with thermal analysis are in good agreement. Chromite samples are ferruginous with goethite and gibbsite contents, whereas manganese ores vary in composition and also exhibit multiple and/or overlapping transformations.

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  1. Department of Metallurgical and Materials Engineering, NIT Rourkela, Rourkela, Odisha, 769008, India

    S. K. Samal, M. K. Mohanty & S. C. Mishra

  2. Suraj Products Limited, Rourkela, Odisha, 770017, India

    B. Mishra

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Samal, S.K., Mohanty, M.K., Mishra, B. et al. Thermal Transformation of Oxide and Hydroxide Minerals in Chromite and Manganese Ores. Mining, Metallurgy & Exploration 38, 1125–1134 (2021). https://doi.org/10.1007/s42461-021-00382-2

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