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Volume 26 Issue 4
Apr.  2019
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文章导航 >  矿物冶金与材料学报（英文）  > 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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研究论文

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

  • College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China

  • Chongqing Key Laboratory of Vanadium-Titanium Metallurgy and New Materials, Chongqing 400044, China

  • 通讯作者:

    Mei-long Hu    E-mail: hml@cqu.edu.cn

  • 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.
    • Research Article

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

    + Author Affiliations
      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.
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