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<p>Splash dynamics of molten droplets play a critical role in achieving efficient decarbonization and smelting during converter blowing, yet the process mechanisms remain underexplored due to monitoring limitations. A computational model was systematically established for droplet initial conditions through mechanism analysis, employing finite difference methods to simulate droplet trajectories and residence time. The influence of smelting parameters on droplet generation and motion behavior was discussed. Results indicate that as the lance position decreases and oxygen pressure increases, the blowing number, droplet generation rate, characteristic droplet size, and initial droplet angle all increase. Initial droplet velocity displays a U-shaped trend relative to lance position, reaching minimum values at specific positions that shift upward with higher oxygen pressure. Droplet behavior shows strong sensitivity to droplet carbon content, droplet size, slag FeO content, slag height, gas phase fraction, and slag viscosity, while initial angle and velocity demonstrate a weaker influence. Comparative analysis of three 300 t converters reveals inverse correlations between lance position and droplet initial conditions (blowing number, droplet generation rate, diameter, and angle). The difference between initial velocity and angle is small.</p>

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Theoretical calculation of generation of metal droplets and their movement behavior in slag during converter blowing

  • 期刊论文

  • 发表日期：

    2026年7月30日

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  • Tong-Ze Xin,
  • Min Wang,
  • Xin-Gang Ai

摘要

Splash dynamics of molten droplets play a critical role in achieving efficient decarbonization and smelting during converter blowing, yet the process mechanisms remain underexplored due to monitoring limitations. A computational model was systematically established for droplet initial conditions through mechanism analysis, employing finite difference methods to simulate droplet trajectories and residence time. The influence of smelting parameters on droplet generation and motion behavior was discussed. Results indicate that as the lance position decreases and oxygen pressure increases, the blowing number, droplet generation rate, characteristic droplet size, and initial droplet angle all increase. Initial droplet velocity displays a U-shaped trend relative to lance position, reaching minimum values at specific positions that shift upward with higher oxygen pressure. Droplet behavior shows strong sensitivity to droplet carbon content, droplet size, slag FeO content, slag height, gas phase fraction, and slag viscosity, while initial angle and velocity demonstrate a weaker influence. Comparative analysis of three 300 t converters reveals inverse correlations between lance position and droplet initial conditions (blowing number, droplet generation rate, diameter, and angle). The difference between initial velocity and angle is small.