Abstract
As part of ongoing work to develop a low fuel consumption smelting process for comprehensive utilization of Hongge vanadium titanomagnetite (HVTM), the influence mechanism of SiO2 on the oxidation behavior and induration process of HVTM pellets (HVTMP) was investigated in this study. Results showed that as the amount of added SiO2 increased, the oxidation degree and compressive strength of HVTMP decreased rapidly while porosity increased. SiO2 had little effect on phase composition; however, it greatly influenced the microstructural evolution of HVTMP. Moreover, the Si-rich phases that precipitated at the grain boundary reduced grain migration, eventually suppressed grain growth, and affected the induration process. A schematic based on the experimental results was proposed to discuss the induration mechanism of HVTMP with different SiO2 additions. The results could provide theoretical and technical foundations for the comprehensive utilization of HVTM.
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Acknowledgments
This work is financially supported by the National Natural Science Foundation of China (51904066), Fundamental Research Funds for the Central Universities (N182503032), Postdoctoral Foundation of Northeastern University (20190201) and Postdoctoral International Exchange Program (Dispatch Project, 20190075).
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Manuscript submitted January 28, 2019.
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Fu, G., Li, W., Chu, M. et al. Influence Mechanism of SiO2 on the Oxidation Behavior and Induration Process of Hongge Vanadium Titanomagnetite Pellets. Metall Mater Trans B 51, 114–123 (2020). https://doi.org/10.1007/s11663-019-01734-6
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DOI: https://doi.org/10.1007/s11663-019-01734-6