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High-Efficiency Smelting Separation of Vanadium–Titanium Magnetite by Electrothermal Smelting: Parameter Optimization and Element Enrichment Mechanism

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Abstract

Efficient utilization of vanadium–titanium magnetite can be achieved by high-temperature pyrometallurgical smelting separation of the material. The fusibility of vanadium–titanium magnetite during reduction and smelting reflects the difficulty of smelting separation. In this study, the direct reduction of iron obtained from the carbothermal reduction of vanadium–titanium magnetite was used as the raw material for smelting separation, and the effect of process parameters on the smelting separation effect was investigated. The study shows that under the condition of low basicity, the smelting temperature of 1600 °C, basicity of 0.6, carbon ratio of 1.4, and smelting time of 100 min, the recovery rate and mass fraction of Fe, V, and Cr in molten iron are 97.08%, 75.57%, 98.64%, and 96.75%, 1.28%, and 0.35%, respectively, and the recovery rate of TiO2 in slag is 99.76%. Under the condition of high basicity, the smelting temperature of 1600 °C, basicity of 1.0, carbon ratio of 1.4, smelting time of 100 min, the recovery and mass fraction of Fe, V, and Cr in molten iron are 99.74%, 92.53%, 99.10%, and 96.40%, 1.52%, and 0.34%, respectively, and the recovery of TiO2 in slag is 99.71%. The results are of practical interest for efficient smelting of vanadium–titanium magnetite.

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Acknowledgements

The authors are especially grateful to the key research and development project of Hebei Province (21314001D), and special thanks are due to the instrumental analysis from Analytical and Testing Center, Northeastern University.

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Authors and Affiliations

  1. School of Metallurgy, Northeastern University, Shenyang, People’s Republic of China

    Quan Shi & Jue Tang

  2. Liaoning Low-Carbon Steelmaking Technology Engineering Research Center, Shenyang, People’s Republic of China

    Quan Shi & Jue Tang

  3. Engineering Research Center of Frontier Technologies for Low-Carbon Steelmaking (Ministry of Education), Shenyang, People’s Republic of China

    Quan Shi, Jue Tang & Mansheng Chu

  4. State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang, People’s Republic of China

    Mansheng Chu

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  1. Quan Shi
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  2. Jue Tang
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Correspondence to Jue Tang.

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The contributing editor for this article was Mansoor Barati.

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Shi, Q., Tang, J. & Chu, M. High-Efficiency Smelting Separation of Vanadium–Titanium Magnetite by Electrothermal Smelting: Parameter Optimization and Element Enrichment Mechanism. J. Sustain. Metall. 9, 1126–1138 (2023). https://doi.org/10.1007/s40831-023-00708-y

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