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Smelting Reduction Characteristics and Mechanism of Vanadium–Titanium Magnetite Carbon-Bearing Pellet

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Abstract

Vanadium–titanium magnetite is one kind of important strategic resources. However, there exist some common problems in the current smelting process of vanadium–titanium magnetite. In the present paper, we propose the rotary kiln pre-reduction and bath smelting process reasonably for smelting vanadium–titanium magnetite. The smelting reduction test of vanadium–titanium magnetite carbon-bearing pellet in the bath was conducted under laboratory condition, and the effect of end slag basicity, the smelting temperature, the smelting time and the amount of pulverized coal on the separation of slag–iron and the quality of hot metal were mainly investigated. The results showed that the reasonable smelting parameters for vanadium–titanium magnetite smelting of the process introduced in the paper were above 1450 °C of smelting temperature, above 0.8 of basicity of slag, 30–40 min of smelting time and 20–22% of coal addition. Nevertheless, the sulfur content of the iron particle was higher than the demand of steelmaking and it needed further desulfurization. The process is economically feasible for smelting vanadium–titanium magnetite, which can recover the vanadium and titanium resources effectively.

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Acknowledgements

This work was supported by the National Key Research and Development Program of China under Grant No. 2017YFB0603800 & 2017YFB0603802; National Key Research and Development Program of China under Grant No. 2017YFC0210301; National Natural Science Foundation of China under Grant No. 51234003.

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Authors and Affiliations

  1. School of Metallurgical Engineering, Anhui University of Technology, Maanshan, 243002, Anhui Province, People’s Republic of China

    Junmao Qie & Yingyi Zhang

  2. State Key Laboratory of Advanced Steel Process and Products, Central Iron and Steel Research Institute, Beijing, 100081, People’s Republic of China

    Junmao Qie, Jianjun Gao, Xinyu Wan & Feng Wang

  3. College of Material Science and Engineering, Chongqing University, Chongqing, 400030, People’s Republic of China

    Yingyi Zhang

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  1. Junmao Qie
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  2. Jianjun Gao
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  5. Feng Wang
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Correspondence to Junmao Qie.

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Qie, J., Gao, J., Zhang, Y. et al. Smelting Reduction Characteristics and Mechanism of Vanadium–Titanium Magnetite Carbon-Bearing Pellet. Trans Indian Inst Met 74, 341–353 (2021). https://doi.org/10.1007/s12666-020-02132-2

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