Effect of titanium content on the precipitation behavior of carbon-saturated molten pig iron

Lei-zhang Gao; Tong-xiang Ma; Meng-jun Hu; Zhi-ming Yan; Xue-wei Lü; Mei-long Hu

doi:10.1007/s12613-019-1755-3

Volume 26 Issue 4

Apr. 2019

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2019 > 26(4): 483-492

Lei-zhang Gao, Tong-xiang Ma, Meng-jun Hu, Zhi-ming Yan, Xue-wei Lü, and Mei-long Hu, Effect of titanium content on the precipitation behavior of carbon-saturated molten pig iron, Int. J. Miner. Metall. Mater., 26(2019), No. 4, pp. 483-492. https://doi.org/10.1007/s12613-019-1755-3

Cite this article as:

Lei-zhang Gao, Tong-xiang Ma, Meng-jun Hu, Zhi-ming Yan, Xue-wei Lü, and Mei-long Hu, Effect of titanium content on the precipitation behavior of carbon-saturated molten pig iron, Int. J. Miner. Metall. Mater., 26(2019), No. 4, pp. 483-492. https://doi.org/10.1007/s12613-019-1755-3

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Research Article

Effect of titanium content on the precipitation behavior of carbon-saturated molten pig iron

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Corresponding author:
Mei-long Hu E-mail: hml@cqu.edu.cn
Received: 7 February 2018; Revised: 5 November 2018; Accepted: 8 November 2018

Abstract

Abstract

The use of iron ores bearing titanium as a raw material is an effective measure to prevent hearth erosion and prolong the life of a blast furnace. In this research, the effect of titanium content on the precipitation behaviors of high-melting phases of carbon-saturated molten pig iron were studied by confocal scanning laser microscopy. The results showed that, when the titanium content was less than 0.25wt%, Fe₃C was precipitated as a single phase from the molten carbon-saturated iron. The growth rate of the precipitated Fe₃C crystals was very high, reaching 7387 μm²/s. When the titanium content in the molten pig iron was greater than 0.47wt%, TiC crystals precipitated first. The shape and size of the precipitated TiC crystals did not obviously change. After TiC was precipitated, the fluidity of the molten pig iron worsened. With a decrease in temperature, Fe₃C was also precipitated but the growth rate of Fe₃C was limited by the presence of the first precipitated TiC phase. The crystal size of the precipitated Fe₃C was much smaller than that of pure Fe₃C.
- carbon-saturated molten pig iron;
- precipitation behavior;
- titanium;
- titanium carbide;
- confocal scanning laser microscopy

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References

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