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In this work, in order to solve the problem of slag-sticking in the insertion tubeInsertion tube during the RH refiningRH refining process of high-carbon steel, through experimental and thermodynamicThermodynamics calculations to analyze the performance and changing laws of the CaO-SiO2-Al2O3-MgO-FeO-MnO-CaF2-Na2O slag system, and to research the interactionInteraction between refining slag and insertion tubeInsertion tube refractoryRefractory material. The results show that within the range of slag system composition in this study, the melting temperatureTemperature first increases and then decreases with the increase of basicity, while the viscosity changes in the opposite manner. The increasing mannesmann index will reduce the melting temperatureTemperature, but the viscosity change first increases and then decreases. After the interactionInteraction of refining slag with corundum refractoryRefractory material, the main phases are Ca2SiO4 and Ca2Al2SiO7. Comprehensive analysis of the basicity of 2.2–2.6, mannesmann index of 0.15–0.25, MgO of 5 wt%, CaF2 + Na2O of 6 wt% of refining slag can reduce the insertion tubeInsertion tube slag-sticking.

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Study on the Interaction Between RH Refining Slag Performance and Refractory Material of Insertion Tube

  • 会议论文

  • 发表日期：

    2025年

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  • Tengfei Wang,
  • Fushen Li,
  • Shuo Sun,
  • Yu Wang,
  • Xiaoping Liang,
  • Hongpo Wang

摘要

In this work, in order to solve the problem of slag-sticking in the insertion tubeInsertion tube during the RH refiningRH refining process of high-carbon steel, through experimental and thermodynamicThermodynamics calculations to analyze the performance and changing laws of the CaO-SiO2-Al2O3-MgO-FeO-MnO-CaF2-Na2O slag system, and to research the interactionInteraction between refining slag and insertion tubeInsertion tube refractoryRefractory material. The results show that within the range of slag system composition in this study, the melting temperatureTemperature first increases and then decreases with the increase of basicity, while the viscosity changes in the opposite manner. The increasing mannesmann index will reduce the melting temperatureTemperature, but the viscosity change first increases and then decreases. After the interactionInteraction of refining slag with corundum refractoryRefractory material, the main phases are Ca2SiO4 and Ca2Al2SiO7. Comprehensive analysis of the basicity of 2.2–2.6, mannesmann index of 0.15–0.25, MgO of 5 wt%, CaF2 + Na2O of 6 wt% of refining slag can reduce the insertion tubeInsertion tube slag-sticking.