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Evolution of Mg-Al-based Inclusions with Changes in Mg Content during Ladle Treatment Based on a Coupled Reaction Model

机译:基于耦合反应模型的钢包处理过程中Mg-Al基夹杂物的演变

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摘要

In the steelmaking process, MgAl_2O_4 spinel inclusions diminish steel qualities and cause nozzle clogging based on the high melting point and low deformation of MgAl_2O_4. Typically, MgAl_2O_4 spinel inclusions are generated from Al_2O_3 inclusions with increasing MgO content, meaning ladle treatment does not represent an equilibrium state. However, complex reactions simultaneously occur between molten steel, slag, inclusions, refractory, and alloying elements during ladle treatment. Therefore, it is necessary to develop a kinetic model to predict compositional changes in molten steel, slag, and the inclusions during ladle treatment. Such a kinetic model must be able to simulate the generation of MgAl_2O_4 spinel inclusions from Al_2O_3 to control such inclusions. Additionally, MgAl_2O_4 spinel inclusions can evolve into MgO-rich inclusions with gradually increasing MgO content in Mg-AI-based inclusions. In this study, we developed an enhanced kinetic model based on a coupled reaction model with the compositional changes in Mg-AI-based inclusions. We also investigated the influence of the CaO/SiO_2 ratio in slag on the generation of spinel inclusions under industrial conditions for a 210-ton steel sample.
机译:在炼钢工艺中,MgAl_2O_4尖晶石夹杂物减少钢质质量,并导致基于高熔点的喷嘴堵塞和MgAl_2O_4的低变形。通常,MgAl_2O_4尖晶石夹杂物由Al_2O_3夹杂物产生,随着MgO含量的增加,含钢包装不表示平衡状态。然而,在钢包处理期间钢水,炉渣,夹杂物,耐火材料和合金元素之间同时发生复杂的反应。因此,有必要开发一种动力学模型,以预测钢水,炉渣和含水剂在钢包处理期间的组成变化。这种动力学模型必须能够模拟来自AL_2O_3的MGAL_2O_4尖晶石夹杂物的产生以控制这种夹杂物。另外,MgAl_2O_4尖晶石夹杂物可以在Mg-AI基夹杂物中逐渐增加MgO含量的富含MgO的夹杂物。在这项研究中,我们基于偶联反应模型开发了一种增强的动力学模型,其具有基于Mg-AI的夹杂物的组成变化。我们还调查了渣中的CaO / SiO_2比率对210吨钢样品的工业条件下的尖晶石夹杂物的产生。

著录项

  • 来源
    《ISIJ international》 |2020年第4期|691-698|共8页
  • 作者

    Jeong-In KIM; Sun-Joong KIM;

  • 作者单位

    Department of Material Science & Engineering Chosun University 309 Pilmun-daero Dong-gu Gwangju 61452 Republic of Korea;

    Department of Material Science & Engineering Chosun University 309 Pilmun-daero Dong-gu Gwangju 61452 Republic of Korea;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    ladle treatment; coupled reaction model; slag basicity; MgAl_2O_4 spinel inclusions; MgO inclusions;

    机译:钢包治疗;耦合反应模型;渣碱;mgal_2O_4尖晶石夹杂物;MgO夹杂物;

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