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<p>In order to achieve effective dephosphorization in the double slag converter steelmaking process, the effect of basicity on the break temperature and phase composition of slag from the double slag converter steelmaking process was studied in this work by using X-ray diffraction (XRD) and scanning electron microscope equipped with energy dispersive spectrometer (SEM-EDS). The results showed that the break temperature and activation energy of slag exhibited an increasing trend followed by a decrease with the increase of basicity, reaching its highest value at 1.7, indicating the highest flow resistance of the slag. During the cooling process from 1450&#xa0;°C to 1390&#xa0;°C, the mineralogical phase composition of steelmaking slag underwent significant transformation. When the temperatures were 1450&#xa0;°C and 1390&#xa0;°C, an increase in basicity from 1.3 to 1.7 resulted in sufficient growth and precipitation of a phosphorous -rich phase. This study could provide the theoretical and technical foundation for optimizing the double slag converter steelmaking process.</p>

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Effect of Basicity on the Break Temperature and Phase Composition of Slag from the Double Slag Converter Steelmaking Process

  • 期刊论文

  • 发表日期：

    2025年10月10日

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  • Wei Li,
  • Ruiqi Zeng

摘要

In order to achieve effective dephosphorization in the double slag converter steelmaking process, the effect of basicity on the break temperature and phase composition of slag from the double slag converter steelmaking process was studied in this work by using X-ray diffraction (XRD) and scanning electron microscope equipped with energy dispersive spectrometer (SEM-EDS). The results showed that the break temperature and activation energy of slag exhibited an increasing trend followed by a decrease with the increase of basicity, reaching its highest value at 1.7, indicating the highest flow resistance of the slag. During the cooling process from 1450 °C to 1390 °C, the mineralogical phase composition of steelmaking slag underwent significant transformation. When the temperatures were 1450 °C and 1390 °C, an increase in basicity from 1.3 to 1.7 resulted in sufficient growth and precipitation of a phosphorous -rich phase. This study could provide the theoretical and technical foundation for optimizing the double slag converter steelmaking process.