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| Oxidation behavior of low-grade vanadiferous titanomagnetite concentrate with high titanium |
| Jin-sheng Liu1,2,3, Zhen-xing Xing1,2,3, Gong-jin Cheng1,2, Xue-yong Ding1,2, Xiang-xin Xue2,3 |
| 1 School of Metallurgy, Northeastern University, Shenyang 110819, Liaoning, China 2 Liaoning Key Laboratory of Recycling Science for Metallurgical Resources, Shenyang 110819, Liaoning, China 3 Innovation Research Institute of Vanadium and Titanium Resource Industry Technology, Northeastern University, Shenyang 110819, Liaoning, China |
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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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| Cite this article: |
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Jin-sheng Liu,Zhen-xing Xing,Gong-jin Cheng, et al. Oxidation behavior of low-grade vanadiferous titanomagnetite concentrate with high titanium[J]. Journal of Iron and Steel Research International, 2024, 31(02): 329-341.
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2024, Vol. 31 
