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Volume 25 Issue 6
Jun.  2018
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文章导航 >  矿物冶金与材料学报（英文）  > 2018  >  25(6): 591-597
Xiao-ping Wang, Ti-chang Sun, Jue Kou, Zhao-chun Li,  and Yu Tian, Feasibility of co-reduction roasting of a saprolitic laterite ore and waste red mud, Int. J. Miner. Metall. Mater., 25(2018), No. 6, pp. 591-597. https://doi.org/10.1007/s12613-018-1606-7
Cite this article as:
Xiao-ping Wang, Ti-chang Sun, Jue Kou, Zhao-chun Li,  and Yu Tian, Feasibility of co-reduction roasting of a saprolitic laterite ore and waste red mud, Int. J. Miner. Metall. Mater., 25(2018), No. 6, pp. 591-597. https://doi.org/10.1007/s12613-018-1606-7
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研究论文

Feasibility of co-reduction roasting of a saprolitic laterite ore and waste red mud

  • School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China

  • 通讯作者:

    Ti-chang Sun    E-mail: suntc@ces.ustb.edu.cn

  • Large scale utilization is still an urgent problem for waste red mud with a high content of alkaline metal component in the future. Laterite ores especially the saprolitic laterite ore are one refractory nickel resource, the nickel and iron of which can be effectively recovered by direct reduction and magnetic separation. Alkaline metal salts were usually added to enhance reduction of laterite ores. The feasibility of co-reduction roasting of a saprolitic laterite ore and red mud was investigated. Results show that the red mud addition promoted the reduction of the saprolitic laterite ore and the iron ores in the red mud were co-reduced and recovered. By adding 35wt% red mud, the nickel grade and recovery were 4.90wt% and 95.25wt%, and the corresponding iron grade and total recovery were 71.00wt% and 93.77wt%, respectively. The X-ray diffraction (XRD), scanning electron microscopy, and energy dispersive spectroscopy (SEM-EDS) analysis results revealed that red mud addition was helpful to increase the liquid phase and ferronickel grain growth. The chemical compositions “CaO and Na2O” in the red mud replaced FeO to react with SiO2 and MgSiO3 to form augite.
    • Research Article

    Feasibility of co-reduction roasting of a saprolitic laterite ore and waste red mud

    + Author Affiliations
      Abstract
    • Large scale utilization is still an urgent problem for waste red mud with a high content of alkaline metal component in the future. Laterite ores especially the saprolitic laterite ore are one refractory nickel resource, the nickel and iron of which can be effectively recovered by direct reduction and magnetic separation. Alkaline metal salts were usually added to enhance reduction of laterite ores. The feasibility of co-reduction roasting of a saprolitic laterite ore and red mud was investigated. Results show that the red mud addition promoted the reduction of the saprolitic laterite ore and the iron ores in the red mud were co-reduced and recovered. By adding 35wt% red mud, the nickel grade and recovery were 4.90wt% and 95.25wt%, and the corresponding iron grade and total recovery were 71.00wt% and 93.77wt%, respectively. The X-ray diffraction (XRD), scanning electron microscopy, and energy dispersive spectroscopy (SEM-EDS) analysis results revealed that red mud addition was helpful to increase the liquid phase and ferronickel grain growth. The chemical compositions “CaO and Na2O” in the red mud replaced FeO to react with SiO2 and MgSiO3 to form augite.
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      • References(17)
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