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Oxidation behavior of low-grade vanadiferous titanomagnetite concentrate with high titanium

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Abstract

In order to clarify the oxidation mechanisms and make better use of the low-grade vanadiferous titanomagnetite concentrate with high titanium (LVTC), the oxidation behavior of LVTC was investigated. The results showed that oxidation degree was achieved within 90 min when temperature was not lower than 700 °C, and the main phases of the oxidized LVTC consisted of Fe9TiO15, Fe2O3, CaSiTiO5 and a small amount of Fe2.75Ti0.25O4. Increasing temperature is favorable to the formation of Fe2TiO5. The surface of LVTC gradually becomes rough, with fine particles of needle-like and granular shape appearing on the surface, which finally turn from laminar to creamy, spread out, and are interspersed with many tiny holes. The phase oxidation paths in LVTC were as follows: (1) Fe2.75Ti0.25O4 → Fe9TiO15 + Fe2O3; (2) Fe2.75Ti0.25O4 → Fe2O3 + FeTiO3 → Fe2TiO5; (3) FeTiO3 → Fe2O3 + Fe2Ti3O9 → Fe2TiO5. LVTC is predominantly mesoporous whether oxidized or not, with the pores mainly distributed in the range of 2–40 nm, and the specific surface area of LVTC decreases significantly with increasing temperature.

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Acknowledgements

This project is supported by the National Natural Science Foundation of China (Grant Nos. 51674084, 21908020 and U1908226) and the National Key R&D Program of China (No. 2017YFB0603801).

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Authors and Affiliations

  1. School of Metallurgy, Northeastern University, Shenyang, 110819, Liaoning, China

    Jin-sheng Liu, Zhen-xing Xing, Gong-jin Cheng & Xue-yong Ding

  2. Liaoning Key Laboratory of Recycling Science for Metallurgical Resources, Shenyang, 110819, Liaoning, China

    Jin-sheng Liu, Zhen-xing Xing, Gong-jin Cheng, Xue-yong Ding & Xiang-xin Xue

  3. Innovation Research Institute of Vanadium and Titanium Resource Industry Technology, Northeastern University, Shenyang, 110819, Liaoning, China

    Jin-sheng Liu, Zhen-xing Xing & Xiang-xin Xue

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  1. Jin-sheng Liu
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Correspondence to Xue-yong Ding or Xiang-xin Xue.

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Liu, Js., Xing, Zx., Cheng, Gj. et al. Oxidation behavior of low-grade vanadiferous titanomagnetite concentrate with high titanium. J. Iron Steel Res. Int. 31, 329–341 (2024). https://doi.org/10.1007/s42243-023-01077-2

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