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Influence of TiO2 on the melting property and viscosity of Cr-containing high-Ti melting slag

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Abstract

A study on the melting and viscosity properties of the chromium-containing high-titanium melting slag (CaO-SiO2-MgO-Al2O3-TiO2-Cr2O3) with TiO2 contents ranging from 38.63wt% to 42.63wt% was conducted. The melting properties were investigated with a melting-point apparatus, and viscosity was measured using the rotating cylinder method. The FactSage 7.1 software and X-ray diffraction, in combination with scanning electron microscopy-energy-dispersive spectroscopy (SEM-EDS), were used to characterize the phase equilibrium and microstructure of chromium-containing high-titanium melting slags. The results indicated that an increase in the TiO2 content led to a decrease in the viscosity of the chromium-containing high-titanium melting slag. In addition, the softening temperature, hemispheric temperature, and flowing temperature decreased with increasing TiO2 content. The amount of crystallized anosovite and sphene phases gradually increased with increasing TiO2 content, whereas the amount of perovskite phase decreased. SEM observations revealed that the distribution of the anosovite phase was dominantly influenced by TiO2.

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Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (No. 51904066), the Fundamental Research Funds for the Central Universities, China (No. N182503032), the Postdoctoral Foundation of Northeastern University, China (No. 20190201) and the Postdoctoral International Exchange Program, China (Dispatch Project, 20190075).

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  1. School of Metallurgy, Northeastern University, Shenyang, 110819, China

    Jing Ma, Gui-qin Fu, Wei Li & Miao-yong Zhu

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  1. Jing Ma
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  2. Gui-qin Fu
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  4. Miao-yong Zhu
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Correspondence to Wei Li.

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Ma, J., Fu, Gq., Li, W. et al. Influence of TiO2 on the melting property and viscosity of Cr-containing high-Ti melting slag. Int J Miner Metall Mater 27, 310–318 (2020). https://doi.org/10.1007/s12613-019-1914-6

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  • DOI: https://doi.org/10.1007/s12613-019-1914-6

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