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Effect of Preformed Calcium Ferrite Addition on Sintering Behavior of Vanadium Titanium Magnetite Ore

  • Sintering of Oxides and Concentrates
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Abstract

A new approach is proposed to improve the strength of the vanadium titanium magnetite (VTM) sinter by adding preformed calcium ferrite (CF) to partially substitute the CaO. The effects of the sintering temperature, oxygen partial pressure (pO2), heating time, and substitution ratio of preformed CF on the mineralogy of the VTM sinter are examined through tablet sintering. The results indicate that sintering temperature significantly affects the matrix structure and pore morphology by influencing solid–liquid assimilation and bubble coalescence. With an increase in pO2, the generation of calcium ferrites and hematite is favored, and the matrix transforms into a melting corrosion structure. Heating time mainly affects the pore shape. The addition of preformed CF to VTM sintering can not only inhibit the generation of perovskite and promote the formation of calcium ferrites but also increase the quantity of melts and promote solid–liquid assimilation.

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Acknowledgements

The authors are grateful to the financial support of the National Natural Science Foundation of China (Grant No. U1902217) and the National Natural Science Foundation of China (Grant No. 51674055).

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Authors and Affiliations

  1. College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China

    Gang Li, Xuewei Lv, Zhuang Zheng, Jiawei Ling & Guibao Qiu

  2. Chongqing Key Laboratory of Vanadium-Titanium Metallurgy and New Materials, Chongqing University, Chongqing, 400044, China

    Gang Li, Xuewei Lv, Zhuang Zheng, Jiawei Ling & Guibao Qiu

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  1. Gang Li
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Correspondence to Xuewei Lv.

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Li, G., Lv, X., Zheng, Z. et al. Effect of Preformed Calcium Ferrite Addition on Sintering Behavior of Vanadium Titanium Magnetite Ore. JOM 73, 316–325 (2021). https://doi.org/10.1007/s11837-020-04476-y

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  • DOI: https://doi.org/10.1007/s11837-020-04476-y

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