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A Study on the Roasting Process for Efficient Selective Chlorination of Ilmenite Ores

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Abstract

We investigated the effects of ilmenite roasting temperature on the efficiency of iron oxide removal from the obtained residue by selective chlorination. Roasting-induced phase transformations were analyzed by x-ray diffraction measurements, and the phase composition of roasted residue was shown to be determined by process conditions. The highest iron oxide removal efficiency was observed for non-roasted samples, which was ascribed to the fact that roasted samples contained hematite (Fe2O3), whereas non-roasted ones contained wustite (FeO). The kinetics of selective chlorination was fitted by two models, and the obtained results indicated that the rate-controlling step corresponded to diffusion through the TiO2 layer between the interface and ilmenite core.

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Acknowledgements

This study was supported by the Technology Innovation Program (10052751) funded by the Ministry of Trade, Industry & Energy (MOTIE, Korea).

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Authors and Affiliations

  1. Research Institute of Industrial Science and Technology (RIST), 67 Cheongam-ro, Nam-gu, Pohang-si, Gyeongsangbuk-do, 37673, Republic of Korea

    Jinyoung Kim & Eun Jin Jung

  2. Korea Metal Material Research Association, 135, Jungdae-ro, Songpa-gu, Seoul, 05717, Republic of Korea

    Ye Rin Lee

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  1. Jinyoung Kim
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Correspondence to Eun Jin Jung.

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Kim, J., Lee, Y.R. & Jung, E.J. A Study on the Roasting Process for Efficient Selective Chlorination of Ilmenite Ores. JOM 73, 1495–1502 (2021). https://doi.org/10.1007/s11837-021-04620-2

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