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Chromium Removal from Iron-Rich Waste Generated During Processing Lateritic Nickel Ores

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Energy Technology 2017

Part of the book series: The Minerals, Metals & Materials Series ((MMMS))

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Abstract

Waste, generated during high pressure leaching of lateritic nickel ores, contains about 50% of iron in form of magnetite but high chromium content (~3%) does not allow its extensive utilization as the raw material for pig iron production in blast furnace. The chromium removal from the waste was carried out by two methods: (1) oxidative alkali roasting with NaOH and/or Na2CO3, followed by water leaching and (2) oxidative leaching in KOH sub-molten salts solutions. The results show that about 90.1% of Cr was removed when the waste was roasted at 900 °C for 3 h with 33.1 wt% of NaOH. The removal of 88.2% of Cr was achieved if the waste was roasted at 900 °C for 3 h with 40 wt% of Na2CO3. The sodium content in the water-leached residues was reduced from 5% to about 0.5% by reaction with CaO in aqueous solutions at 80 °C for 2 h. About 70% of Cr was removed if the waste was leached at 190 °C in 73 wt% KOH for 8 h.

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Acknowledgements

The work was supported by the Research intention MSM No. 223100002.

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Authors and Affiliations

  1. University of Chemistry and Technology Prague, Prague, Czech Republic

    Hong Vu, Petr Dvorak, Jana Selucka & Petra Starkova

  2. Aero Vodochody Aerospace a.s., Odolena Voda, Czech Republic

    Tomas Frydl

Authors
  1. Hong Vu
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  2. Tomas Frydl
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  3. Petr Dvorak
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  4. Jana Selucka
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  5. Petra Starkova
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Corresponding author

Correspondence to Hong Vu .

Editor information

Editors and Affiliations

  1. University of Alaska System , Fairbanks, Alaska, USA

    Lei Zhang

  2. 512 Minerals & Matls Engg Bldg, Michigan Technological Univ 512 Minerals & Matls Engg Bldg, Houghton, Michigan, USA

    Jaroslaw W. Drelich

  3. IND LLC , South Jordan, Utah, USA

    Neale R. Neelameggham

  4. Idaho National Laboratory , Idaho Falls, Idaho, USA

    Donna Post Guillen

  5. CSIRO , Canberra, Australia

    Nawshad Haque

  6. Carnegie Mellon University , Pittsburgh, USA

    Jingxi Zhu

  7. Queensland University of Technology , Brisbane, Australia

    Ziqi Sun

  8. Nucor Steel , Manila, Arkansas, USA

    Tao Wang

  9. Purdue University , West Lafayette, Indiana, USA

    John A Howarter

  10. Turku, Finland

    Fiseha Tesfaye

  11. Department of Basic Sciences/Physic, Al Isra University Department of Basic Sciences/Physic, Amman, Jordan

    Shadia Ikhmayies

  12. Massachusetts Institute of Technology , Cambridge, Massachusetts, USA

    Elsa Olivetti

  13. Proval Partners SA , Lausanne, Switzerland

    Mark William Kennedy

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Vu, H., Frydl, T., Dvorak, P., Selucka, J., Starkova, P. (2017). Chromium Removal from Iron-Rich Waste Generated During Processing Lateritic Nickel Ores. In: Zhang, L., et al. Energy Technology 2017. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-319-52192-3_22

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