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A method for recovery of iron, titanium, and vanadium from vanadium-bearing titanomagnetite

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Abstract

An innovative method for recovering valuable elements from vanadium-bearing titanomagnetite is proposed. This method involves two procedures: low-temperature roasting of vanadium-bearing titanomagnetite and water leaching of roasting slag. During the roasting process, the reduction of iron oxides to metallic iron, the sodium oxidation of vanadium oxides to water-soluble sodium vanadate, and the smelting separation of metallic iron and slag were accomplished simultaneously. Optimal roasting conditions for iron/slag separation were achieved with a mixture thickness of 42.5 mm, a roasting temperature of 1200°C, a residence time of 2 h, a molar ratio of C/O of 1.7, and a sodium carbonate addition of 70wt%, as well as with the use of anthracite as a reductant. Under the optimal conditions, 93.67% iron from the raw ore was recovered in the form of iron nugget with 95.44% iron grade. After a water leaching process, 85.61% of the vanadium from the roasting slag was leached, confirming the sodium oxidation of most of the vanadium oxides to water-soluble sodium vanadate during the roasting process. The total recoveries of iron, vanadium, and titanium were 93.67%, 72.68%, and 99.72%, respectively.

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Acknowledgements

This work was financially supported by the National Basic Research Program of China (Nos. 2013CB632601 and 2013CB632604), the National Science Foundation for Distinguished Young Scholars of China (Nos. 51125018 and 51504230), the Key Research Program of the Chinese Academy of Sciences (No. KGZD-EW-201-2), the National Natural Science Foundation of China (Nos. 51374191, 21106167, 2160624, and 51104139), the Financial Grant from the China Postdoctoral Science Foundation (Nos. 2012M510552 and 2013T60175), and the Nonprofit Industry Research Subject of Environmental Projection (No. 201509053).

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Authors and Affiliations

  1. University of Chinese Academy of Sciences, Beijing, 100049, China

    Yi-min Zhang

  2. National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Beijing, 100190, China

    Yi-min Zhang, Li-na Wang, De-sheng Chen, Wei-jing Wang, Ya-hui Liu, Hong-xin Zhao & Tao Qi

  3. Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China

    Yi-min Zhang, Li-na Wang, De-sheng Chen, Wei-jing Wang, Ya-hui Liu, Hong-xin Zhao & Tao Qi

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  1. Yi-min Zhang
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  2. Li-na Wang
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Correspondence to Tao Qi.

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Zhang, Ym., Wang, Ln., Chen, Ds. et al. A method for recovery of iron, titanium, and vanadium from vanadium-bearing titanomagnetite. Int J Miner Metall Mater 25, 131–144 (2018). https://doi.org/10.1007/s12613-018-1556-0

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  • DOI: https://doi.org/10.1007/s12613-018-1556-0

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