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Selective Precipitation of Magnetite in Copper Slag by Controlled Molten Oxidation

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Advances in Molten Slags, Fluxes, and Salts: Proceedings of the 10th International Conference on Molten Slags, Fluxes and Salts 2016

Abstract

Molten oxidation is a sustainable process for direct precipitation of magnetite from melt copper smelter slag because it involves zero or less energy input due to the exothermic reaction and free reducing carbon addition. During molten oxidation, magnetite precipitation occurred preferentially because of its intensive ferromagnetism and large crystal size, which enables downstream magnetic separation. Previous milligram-scale experiments conducted using an infrared furnace show that magnetite could be precipitated, while precipitation of hematite was limited under an atmosphere of 1 vol% oxygen. In this study, gram-scale experiments were conducted using an electric furnace to verify larger-scale molten oxidation at 1 vol% oxygen.

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Author information

Authors and Affiliations

  1. Graduate School of Environmental Studies, Tohoku University, 6-6-20 Aramaki-Aza-Aoba, Aoba-ku, Sendai, 980-8579, Japan

    Yong Fan

  2. Institute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University, 2-1-1 Katahira, Aobaku, Sendai, 980-8577, Japan

    Etsuro Shibata, Atsushi Iizuka & Takashi Nakamura

Authors
  1. Yong Fan
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  2. Etsuro Shibata
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  3. Atsushi Iizuka
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  4. Takashi Nakamura
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Editor information

Editors and Affiliations

  1. The University of Alabama, USA

    Ramana G. Reddy (Conference Chair) (Conference Chair)

  2. Global R&D, ArcelorMittal USA, USA

    Pinakin Chaubal (Co-chair) (Co-chair)

  3. Carnegie Mellon University, USA

    P. Chris Pistorius (Co-chair) (Co-chair)

  4. Boston University, USA

    Uday Pal (Co-chair) (Co-chair)

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© 2016 TMS (The Minerals, Metals & Materials Society)

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Fan, Y., Shibata, E., Iizuka, A., Nakamura, T. (2016). Selective Precipitation of Magnetite in Copper Slag by Controlled Molten Oxidation. In: Reddy, R.G., Chaubal, P., Pistorius, P.C., Pal, U. (eds) Advances in Molten Slags, Fluxes, and Salts: Proceedings of the 10th International Conference on Molten Slags, Fluxes and Salts 2016. Springer, Cham. https://doi.org/10.1007/978-3-319-48769-4_73

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