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

Xiao-ping Wang; Ti-chang Sun; Jue Kou; Zhao-chun Li; Yu Tian

doi:10.1007/s12613-018-1606-7

Volume 25 Issue 6

Jun. 2018

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International Journal of Minerals, Metallurgy and Materials > 2018 > 25(6): 591-597. > DOI: 10.1007/s12613-018-1606-7

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://dx.doi.org/10.1007/s12613-018-1606-7

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Research Article

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

Author Affilications

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

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This work was financially supported by the National Natural Science Foundation of China (Nos. 51474018 and 51674018).

Received: 10 October 2017; Revised: 26 November 2017; Accepted: 09 December 2017;

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Abstract

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.
- laterite ore,
- red mud,
- reduction roasting,
- phase transformation

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References (17)

References

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