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Volume 26 Issue 8
Aug.  2019
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文章导航 >  矿物冶金与材料学报（英文）  > 2019  >  26(8): 938-945
Yong-sheng Sun, Yan-feng Li, Yue-xin Han, and Yan-jun Li, Migration behaviors and kinetics of phosphorus during coal-based reduction of high-phosphorus oolitic iron ore, Int. J. Miner. Metall. Mater., 26(2019), No. 8, pp. 938-945. https://doi.org/10.1007/s12613-019-1810-0
Cite this article as:
Yong-sheng Sun, Yan-feng Li, Yue-xin Han, and Yan-jun Li, Migration behaviors and kinetics of phosphorus during coal-based reduction of high-phosphorus oolitic iron ore, Int. J. Miner. Metall. Mater., 26(2019), No. 8, pp. 938-945. https://doi.org/10.1007/s12613-019-1810-0
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研究论文

Migration behaviors and kinetics of phosphorus during coal-based reduction of high-phosphorus oolitic iron ore

  • School of Resources and Civil Engineering, Northeastern University, Shenyang 110819, China

  • 通讯作者:

    Yong-sheng Sun    E-mail: yongshengsun@mail.neu.edu.cn

  • To understand the migration mechanisms of phosphorus (P) during coal-based reduction, a high-phosphorus oolitic iron ore was reduced by coal under various experimental conditions. The migration characteristics and kinetics of P were investigated by a field-emission electron probe microanalyzer (FE-EPMA) and using the basic principle of solid phase mass transfer, respectively. Experimental results showed that the P transferred from the slag to the metallic phase during reduction, and the migration process could be divided into three stages:phosphorus diffusing from the slag to the metallic interface, the formation of Fe-P compounds at the slag-metal interface and P diffusing from the slag-metal interface to the metallic interior. The reduction time and temperature significantly influenced the phosphorus content of the metallic and slag phases. The P content of the metallic phase increased with increasing reduction time and temperature, while that of the slag phase gradually decreased. The P diffusion constant and activation energy were determined and a migration kinetics model of P in coal-based reduction was proposed. P diffusion in the metallic phase was the controlling step of the P migration.
    • Research Article

    Migration behaviors and kinetics of phosphorus during coal-based reduction of high-phosphorus oolitic iron ore

    + Author Affiliations
      Abstract
    • To understand the migration mechanisms of phosphorus (P) during coal-based reduction, a high-phosphorus oolitic iron ore was reduced by coal under various experimental conditions. The migration characteristics and kinetics of P were investigated by a field-emission electron probe microanalyzer (FE-EPMA) and using the basic principle of solid phase mass transfer, respectively. Experimental results showed that the P transferred from the slag to the metallic phase during reduction, and the migration process could be divided into three stages:phosphorus diffusing from the slag to the metallic interface, the formation of Fe-P compounds at the slag-metal interface and P diffusing from the slag-metal interface to the metallic interior. The reduction time and temperature significantly influenced the phosphorus content of the metallic and slag phases. The P content of the metallic phase increased with increasing reduction time and temperature, while that of the slag phase gradually decreased. The P diffusion constant and activation energy were determined and a migration kinetics model of P in coal-based reduction was proposed. P diffusion in the metallic phase was the controlling step of the P migration.
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