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<p>The three-dimensional multiphase flow and the unreacted core desulfurization kinetic model were coupled to predict the sulfur content in hot metal during the Kanbara reactor (KR) stirring process. The effect of the impeller rotation speed, initial sulfur content, desulfurizer diameter, and desulfurizer addition on the variation of the sulfur content and desulfurization rate was revealed. The accuracy of the current model was validated through industrial trials involving sampling and measurement of the&#xa0;sulfur content in hot metal. Results indicated that the speed of the hot metal and the vortex distribution were primary factors determining the dispersion degree of the desulfurizer and the desulfurization rate. The variation of the average sulfur content during the KR process essentially followed an exponential distribution. The desulfurization rate constant increased with the higher rotation speed, higher desulfurizer addition, and lower desulfurizer diameter. However, the initial sulfur content in the hot metal hardly affects the desulfurization rate constant. A formula for predicting the variation of the sulfur content with the initial sulfur content, impeller rotation speed, desulfurizer diameter, total mass of desulfurizers, total mass of hot metal, and desulfurization time was proposed to provide theoretical guidance for the&#xa0;actual production.</p>

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Prediction on sulfur content in hot metal during KR stirring desulfurization process using coupled three-dimensional flow and unreacted core model

  • 期刊论文

  • 发表日期：

    2026年4月2日

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  • Wei Chen,
  • Yan-Yu Zhao,
  • Li-Feng Zhang

摘要

The three-dimensional multiphase flow and the unreacted core desulfurization kinetic model were coupled to predict the sulfur content in hot metal during the Kanbara reactor (KR) stirring process. The effect of the impeller rotation speed, initial sulfur content, desulfurizer diameter, and desulfurizer addition on the variation of the sulfur content and desulfurization rate was revealed. The accuracy of the current model was validated through industrial trials involving sampling and measurement of the sulfur content in hot metal. Results indicated that the speed of the hot metal and the vortex distribution were primary factors determining the dispersion degree of the desulfurizer and the desulfurization rate. The variation of the average sulfur content during the KR process essentially followed an exponential distribution. The desulfurization rate constant increased with the higher rotation speed, higher desulfurizer addition, and lower desulfurizer diameter. However, the initial sulfur content in the hot metal hardly affects the desulfurization rate constant. A formula for predicting the variation of the sulfur content with the initial sulfur content, impeller rotation speed, desulfurizer diameter, total mass of desulfurizers, total mass of hot metal, and desulfurization time was proposed to provide theoretical guidance for the actual production.