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Ferronickel enrichment by fine particle reduction and magnetic separation from nickel laterite ore

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Abstract

Ferronickel enrichment and extraction from nickel laterite ore were studied through reduction and magnetic separation. Reduction experiments were performed using hydrogen and carbon monoxide as reductants at different temperatures (700–1000°C). Magnetic separation of the reduced products was conducted using a SLon-100 cycle pulsating magnetic separator (1.2 T). Composition analysis indicates that the nickel laterite ore contains a total iron content of 22.50wt% and a total nickel content of 1.91wt%. Its mineral composition mainly consists of serpentine, hortonolite, and goethite. During the reduction process, the grade of nickel and iron in the products increases with increasing reduction temperature. Although a higher temperature is more favorable for reduction, the temperature exceeding 1000°C results in sintering of the products, preventing magnetic separation. After magnetic separation, the maximum total nickel and iron concentrations are 5.43wt% and 56.86wt%, and the corresponding recovery rates are 84.38% and 53.76%, respectively.

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Authors and Affiliations

  1. School of Metallurgical and Ecological Engineering, University of Science and Technology, Beijing, 100083, China

    Xiao-hui Tang, Run-zao Liu, Li Yao, Zhi-jun Ji, Yan-ting Zhang & Shi-qi Li

  2. Tangshan Branch, Hebei Iron and Steel Co. Ltd., Tangshan, 063020, China

    Li Yao

  3. Tianjin Pipe Group Co. Ltd., Tianjin, 300301, China

    Yan-ting Zhang

Authors
  1. Xiao-hui Tang
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  2. Run-zao Liu
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  3. Li Yao
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  4. Zhi-jun Ji
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  5. Yan-ting Zhang
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  6. Shi-qi Li
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Correspondence to Run-zao Liu.

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Tang, Xh., Liu, Rz., Yao, L. et al. Ferronickel enrichment by fine particle reduction and magnetic separation from nickel laterite ore. Int J Miner Metall Mater 21, 955–961 (2014). https://doi.org/10.1007/s12613-014-0995-5

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  • DOI: https://doi.org/10.1007/s12613-014-0995-5

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