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Behaviour of Silicon in Nickel Laterite by Carbothermic Reduction in Vacuum

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8th International Symposium on High-Temperature Metallurgical Processing

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

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Abstract

The carbonthermal reduction of high Mg–Si nickel laterite was studied under vacuum. The effects of adding calcium oxide and the reducing agent on the reduction of silicon in residue were studied at pressures of 10–200 Pa and different temperatures, with varying proportions of carbon and CaO. The analysis of the residue was performed using X-ray diffraction and chemical composition analysis. The results show the following: At 1350 °C with a C/O ratio of 1.5:1, the recovery of Si reached a maximum 71.09%. Under these conditions, Si exists mainly in the forms of Fe3Si, Fe2Si, FeSi and SiC. The recovery of Si was above 80% when the temperature was 1450 °C, the C/O ratio 1:1, and 15% addition of CaO. When CaO addition was 22.61%, all of the solid phase was Ca2SiO4.

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Acknowledgements

This work was supported financially by National Science Foundation of China (No. 51604133) and Academician Free Exploration Fund of Yunnan Province, China (No. 2015HA016 and 2016HA011).

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Authors and Affiliations

  1. The National Engineering Laboratory for Vacuum Metallurgy, Kunming University of Science and Technology, Kunming, 650093, People’s Republic of China

    Lei Shi, Tao Qu, Dachun Liu, Yang Tian, Bin Yang & Yongnian Dai

  2. State Key Laboratory of Complex Nonferrous Metal Resources Clear Utilization, Kunming, 650093, People’s Republic of China

    Tao Qu, Dachun Liu, Yang Tian, Bin Yang & Yongnian Dai

  3. Key Laboratory for Nonferrous Vacuum Metallurgy of Yunnan Province, Kunming, 650093, People’s Republic of China

    Lei Shi, Tao Qu, Dachun Liu, Yang Tian, Bin Yang & Yongnian Dai

  4. Faculty of Metallurgical and Energy Engineering of Kunming University of Science and Technology, Kunming, 650093, People’s Republic of China

    Lei Shi

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  1. Lei Shi
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  2. Tao Qu
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  3. Dachun Liu
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  4. Yang Tian
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  5. Bin Yang
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  6. Yongnian Dai
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Corresponding author

Correspondence to Tao Qu .

Editor information

Editors and Affiliations

  1. Michigan Technological University , Houghton, Michigan, USA

    Jiann-Yang Hwang

  2. Central South University , Changsha, Hunan, China

    Tao Jiang

  3. Proval Partners SA , Lausanne, Switzerland

    Mark William Kennedy

  4. Istanbul Technical University , Istanbul, Turkey

    Onuralp Yücel

  5. Dept of Materials Science and Eng, Carnegie Mellon Univ Dept of Materials Science and Eng, Pittsburgh, Pennsylvania, USA

    P. Chris Pistorius

  6. Universidade Federal de Minas Gerais , Belo Horizonte, Brazil

    Varadarajan Seshadri

  7. The University of Queensland , Brisbane, Australia

    Baojun Zhao

  8. RHI AG , Leoben, Austria

    Dean Gregurek

  9. Atilim University , Ankara, Turkey

    Ender Keskinkilic

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Shi, L., Qu, T., Liu, D., Tian, Y., Yang, B., Dai, Y. (2017). Behaviour of Silicon in Nickel Laterite by Carbothermic Reduction in Vacuum. In: Hwang, JY., et al. 8th International Symposium on High-Temperature Metallurgical Processing. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-319-51340-9_51

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