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<p>Current research focuses on analyzing the melting mechanism of scrap in laboratory settings, with limited reports on scrap melting within actual converter blowing environments. A three-dimensional full-scale converter mathematical model coupling turbulent, multiphase, heat transfer, and mass transfer was established to examine the melting behavior of scrap with varying initial weight and carbon concentration in a combined blowing converter. And, the mathematical model was verified by a water model experiment and a thermal experiment. The results showed that the time required for complete melting of 100&#xa0;kg scrap was 495&#xa0;s, exceeding that of 150 and 200&#xa0;kg scrap by 105 and 30&#xa0;s,&#xa0;respectively, due to changes in the specific surface area of scrap during the melting process. The melting time for scrap with a carbon concentration of 0.612 wt.% is notably shorter at 465&#xa0;s compared to 1575&#xa0;s for 0.326 wt.% carbon concentration and 2475&#xa0;s for 0.183 wt.% carbon concentration. Additionally, secondary solidification occurs during the melting of low-carbon steel and medium-carbon steel. For scrap with a carbon concentration of 0.612 wt.%, the carburizing time was 134&#xa0;s, significantly lower than 300&#xa0;s for 0.326 wt.% carbon concentration and 445&#xa0;s for 0.183 wt.% carbon concentration, respectively.</p>

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Melting behaviors of scrap steel with varying weight and carbon concentration in a combined blowing converter

  • 期刊论文

  • 发表日期：

    2026年3月25日

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  • Jia-Hui Wang,
  • Qing Fang,
  • Jian-Hao Wang,
  • Fei Gao,
  • Zhi-Chong Li,
  • Hua Zhang,
  • Hong-Wei Ni

摘要

Current research focuses on analyzing the melting mechanism of scrap in laboratory settings, with limited reports on scrap melting within actual converter blowing environments. A three-dimensional full-scale converter mathematical model coupling turbulent, multiphase, heat transfer, and mass transfer was established to examine the melting behavior of scrap with varying initial weight and carbon concentration in a combined blowing converter. And, the mathematical model was verified by a water model experiment and a thermal experiment. The results showed that the time required for complete melting of 100 kg scrap was 495 s, exceeding that of 150 and 200 kg scrap by 105 and 30 s, respectively, due to changes in the specific surface area of scrap during the melting process. The melting time for scrap with a carbon concentration of 0.612 wt.% is notably shorter at 465 s compared to 1575 s for 0.326 wt.% carbon concentration and 2475 s for 0.183 wt.% carbon concentration. Additionally, secondary solidification occurs during the melting of low-carbon steel and medium-carbon steel. For scrap with a carbon concentration of 0.612 wt.%, the carburizing time was 134 s, significantly lower than 300 s for 0.326 wt.% carbon concentration and 445 s for 0.183 wt.% carbon concentration, respectively.