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Static Holdup of Liquid Slag in Simulated Packed Coke Bed Under Oxygen Blast Furnace Ironmaking Conditions

  • Fundamental Aspects of High-Temperature Metallurgical Processing
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Abstract

The liquid-phase flow behavior of slag in the lower zone of a blast furnace affects the furnace permeability, performance, and productivity. The effects of pulverized coal injection (PCI) on the behavior of simulated primary slag flow were investigated by quantifying the effect of key variables including Al/Si ratio [Al2O3 (wt.%) to SiO2 (wt.%)] and the amount of unburnt pulverized coal (UPC) at 1500°C. Viscosity analysis demonstrated that the slag fluidity decreased as the Al/Si ratio was increased (from 0.35 to 0.50), resulting in gradual increase of the static holdup. Increasing the amount of UPC resulted in a significant increase of the static holdup. Flooding analysis was applied to determine the maximum static holdup, which was found to be 11.5%. It was inferred that the burnout rates of pulverized coal should exceed 78.6% and 83.9% in traditional and oxygen blast furnaces, respectively.

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Acknowledgements

The authors gratefully acknowledge financial support from the National Key Research and Development Program of China (No. 2016YFB0601304) and the State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing (No. 41616018).

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Authors and Affiliations

  1. State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing, 100083, China

    Guang Wang, Yingli Liu, Zhenfeng Zhou, Jingsong Wang & Qingguo Xue

Authors
  1. Guang Wang
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  2. Yingli Liu
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  3. Zhenfeng Zhou
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  4. Jingsong Wang
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  5. Qingguo Xue
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Correspondence to Guang Wang.

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Wang, G., Liu, Y., Zhou, Z. et al. Static Holdup of Liquid Slag in Simulated Packed Coke Bed Under Oxygen Blast Furnace Ironmaking Conditions. JOM 70, 29–33 (2018). https://doi.org/10.1007/s11837-017-2620-3

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  • DOI: https://doi.org/10.1007/s11837-017-2620-3

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