Settling of Particle in Foaming Slag

DOI Web Site 15 References
  • Shimasaki Shin-ichi
    Department of Electro-Mechanical Systems Engineering, National Institute of Technology, Kagawa College
  • Ueda Shigeru
    Institute of Multidisciplinary Research for Advanced Materials, Tohoku University
  • Saito Noritaka
    Department of Materials, Kyushu University
  • Katoh Kenji
    Department of Engineering, Graduate School of Engineering, Osaka Metropolitan University

Bibliographic Information

Other Title
  • フォーミングしたスラグ中における粒子の沈降

Abstract

<p>In the steelmaking process, molten slag is foamed through gas injection and gas generation reactions, and molten iron droplets get mixed and trapped in the slag. A settling velocity of an iron droplet in the foaming slag are very important, because a residence time of an iron droplet in the slag is directly calculated the settling velocity. According to the previous research, the settling velocity is expected to be slower than in regular non-foaming slag. However, it has yet to be quantitatively clarified. This study measured the settling velocities of particles through a foaming liquid of glycerin-water solution. A dimensionless correlation equation for particle settling velocity in the formed liquid was proposed by conducting a dimensional analysis of the experimental data. Using the obtained equation, we have predicted the settling velocity of iron particles in the foaming slag. It was clarified that the settling velocity of iron particles is highly affected by a volume fraction of gas phase in the foaming slag. There is a certain threshold for the velocity, and the velocity abruptly became zero when it falls below that threshold.</p>

Journal

  • Tetsu-to-Hagane

    Tetsu-to-Hagane 110 (6), 494-502, 2024-04-15

    The Iron and Steel Institute of Japan

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