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Volume 25 Issue 2
Feb.  2018
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文章导航 >  矿物冶金与材料学报（英文）  > 2018  >  25(2): 145-152
Song-tao Yang, Mi Zhou, Tao Jiang,  and Xiang-xin Xue, Isothermal reduction kinetics and mineral phase of chromium-bearing vanadium-titanium sinter reduced with CO gas at 873-1273 K, Int. J. Miner. Metall. Mater., 25(2018), No. 2, pp. 145-152. https://doi.org/10.1007/s12613-018-1557-z
Cite this article as:
Song-tao Yang, Mi Zhou, Tao Jiang,  and Xiang-xin Xue, Isothermal reduction kinetics and mineral phase of chromium-bearing vanadium-titanium sinter reduced with CO gas at 873-1273 K, Int. J. Miner. Metall. Mater., 25(2018), No. 2, pp. 145-152. https://doi.org/10.1007/s12613-018-1557-z
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研究论文

Isothermal reduction kinetics and mineral phase of chromium-bearing vanadium-titanium sinter reduced with CO gas at 873-1273 K

  • School of Metallurgy, Northeastern University, Shenyang 110819, China

  • School of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan 114051, China

  • Key Laboratory of Liaoning Province for Recycling Science of Metallurgical Resources, Shenyang 110819, China

  • 通讯作者:

    Xiang-xin Xue    E-mail: xuexx@mail.neu.edu.cn

  • Reduction of chromium-bearing vanadium-titanium sinter (CVTS) was studied under simulated conditions of a blast furnace, and thermodynamics and kinetics were theoretically analyzed. Reduction kinetics of CVTS at different temperatures was evaluated using a shrinking unreacted core model. The microstructure, mineral phase, and variation of the sinter during reduction were observed by X-ray diffraction, scanning electron microscopy, and metallographic microscopy. Results indicate that porosity of CVTS increased with temperature. Meanwhile, the reduction degree of the sinter improved with the reduction rate. Reduction of the sinter was controlled by a chemical reaction at the initial stage and inner diffusion at the final stage. Activation energies measured 29.22-99.69 kJ/mol. Phase transformations in CVTS reduction are as follows:Fe2O3→Fe3O4→FeO→Fe; Fe2TiO5→Fe2TiO4→FeTiO3; FeO·V2O3→V2O3; FeO·Cr2O3→Cr2O3.
    • Research Article

    Isothermal reduction kinetics and mineral phase of chromium-bearing vanadium-titanium sinter reduced with CO gas at 873-1273 K

    + Author Affiliations
      Abstract
    • Reduction of chromium-bearing vanadium-titanium sinter (CVTS) was studied under simulated conditions of a blast furnace, and thermodynamics and kinetics were theoretically analyzed. Reduction kinetics of CVTS at different temperatures was evaluated using a shrinking unreacted core model. The microstructure, mineral phase, and variation of the sinter during reduction were observed by X-ray diffraction, scanning electron microscopy, and metallographic microscopy. Results indicate that porosity of CVTS increased with temperature. Meanwhile, the reduction degree of the sinter improved with the reduction rate. Reduction of the sinter was controlled by a chemical reaction at the initial stage and inner diffusion at the final stage. Activation energies measured 29.22-99.69 kJ/mol. Phase transformations in CVTS reduction are as follows:Fe2O3→Fe3O4→FeO→Fe; Fe2TiO5→Fe2TiO4→FeTiO3; FeO·V2O3→V2O3; FeO·Cr2O3→Cr2O3.
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      • References(23)
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