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Optimization of Basicity of High Ti Slag for Efficient Smelting of Vanadium Titanomagnetite Metallized Pellets

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Abstract

Slag basicity (mass ratio of CaO to SiO2) is an important index to ensure smooth operation and efficient separation between the metal and slag within the metallurgical industry. Effects of basicity of the high titanium slag on the recovery of iron and vanadium, the separation behaviors between iron and slag, as well as the slag foaming behavior during the smelting process with the operating temperature of 1550 °C have been experimentally investigated. The results show that the recovery ratios of iron and vanadium increase with higher slag basicity. The amount of dispersed metallic iron droplets in the slag decreases sharply when the basicity increases from 0.5 to 0.8, then decreases slowly when the basicity is from 0.8 to 1.1. Furthermore, the perovskite (CaTiO3) phase appears when the basicity is above 0.8. The foaming height is at a high level when the basicity is from 0.5 to 0.6, then it decreases when the basicity is increased from 0.6 to 0.7, whereas it slowly increases with higher slag basicity. Finally, the optimum basicity range of titanium slag for efficient smelting of vanadium titanomagnetite is proposed to be 0.8 to 1.1 by considering the combined effects on the recovery, foaming, and minimization on the retention of the metal droplets within the slag.

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Acknowledgments

The authors would like to acknowledge the financial support from the Natural Science Foundation of Hunan Province, China (Grant No. 2019JJ50816). The authors acknowledge the Australian Microscopy & Microanalysis Research Facility at the Centre for Microscopy and Microanalysis, The University of Queensland, for providing facilities and scientific and technical assistance.

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Authors and Affiliations

  1. School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, China

    Shuai Wang, Yufeng Guo, Fuqiang Zheng, Feng Chen, Lingzhi Yang & Tao Jiang

  2. School of Chemical Engineering, The University of Queensland, Brisbane, 4072, Australia

    Mao Chen & Baojun Zhao

Authors
  1. Shuai Wang
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  2. Yufeng Guo
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  3. Fuqiang Zheng
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  4. Feng Chen
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  6. Mao Chen
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  7. Baojun Zhao
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  8. Tao Jiang
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Correspondence to Yufeng Guo or Fuqiang Zheng.

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Manuscript submitted 13 October 2019.

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Wang, S., Guo, Y., Zheng, F. et al. Optimization of Basicity of High Ti Slag for Efficient Smelting of Vanadium Titanomagnetite Metallized Pellets. Metall Mater Trans B 51, 945–952 (2020). https://doi.org/10.1007/s11663-020-01822-y

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  • DOI: https://doi.org/10.1007/s11663-020-01822-y

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