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Fluidized Bed Selective Oxidation-Sulfation Roasting of Nickel Sulfide Concentrate: Part I. Oxidation Roasting

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Abstract

Two-stage oxidation-sulfation roasting of nickel sulfide concentrate in fluidized bed was investigated to generate water-soluble metal sulfates as an alternative process to smelting of the sulfide concentrate for the recovery of valuable metals. The first stage, i.e., oxidation roasting, was employed to preferentially oxidize the iron before performing sulfation roasting. A batch fluidized bed roaster was constructed for roasting tests. Roasting products from various roasting temperatures and different roasting times were analyzed by SEM/EDS, EPMA, XRD, and ICP-OES to investigate the oxidation roasting behavior of the nickel concentrate as a function of temperature and time.

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Acknowledgements

The authors thank Xstrata Process Support (Sudbury, Ontario, Canada) for providing the concentrate and both Xstrata and Vale for sponsoring the project. Special thanks are due to Yanan Liu of the Department of Geology of the University of Toronto for her assistance in the characterization of the samples. We would also like to express our sincere thanks to Dr. Gus Van Weert of the ORETOME Ltd. for his constructive comments on this paper. The funding for this research was provided by the Natural Sciences and Engineering Research Council (NSERC) of Canada.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, University of Toronto, 184 College Street, Suite 140, Toronto, ON, M5S3E4, Canada

    Dawei Yu (Ph.D. Candidate), Torstein A. Utigard (Professor) & Mansoor Barati (Associate Professor)

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  1. Dawei Yu
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  2. Torstein A. Utigard
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  3. Mansoor Barati
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Correspondence to Dawei Yu.

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Manuscript submitted April 24, 2013.

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Yu, D., Utigard, T.A. & Barati, M. Fluidized Bed Selective Oxidation-Sulfation Roasting of Nickel Sulfide Concentrate: Part I. Oxidation Roasting. Metall Mater Trans B 45, 653–661 (2014). https://doi.org/10.1007/s11663-013-9958-x

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  • DOI: https://doi.org/10.1007/s11663-013-9958-x

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