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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 HuEmail author
Article
  • 3 Downloads

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.

Keywords

carbon-saturated molten pig iron precipitation behavior titanium titanium carbide confocal scanning laser microscopy 

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Notes

Acknowledgements

This work is financially supported by the National Natural Science Foundation of China (No. 51674054) and the Open Foundation of State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization of China.

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Copyright information

© University of Science and Technology Beijing and Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Lei-zhang Gao
    • 1
    • 2
  • Tong-xiang Ma
    • 1
    • 2
  • Meng-jun Hu
    • 1
    • 2
  • Zhi-ming Yan
    • 1
    • 2
  • Xue-wei Lü
    • 1
    • 2
  • Mei-long Hu
    • 1
    • 2
    Email author
  1. 1.College of Materials Science and EngineeringChongqing UniversityChongqingChina
  2. 2.Chongqing Key Laboratory of Vanadium-Titanium Metallurgy and New MaterialsChongqingChina

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