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<p>This study systematically investigated the combined influence of FeO content and basicity on slag foaming behaviour in Electric Arc Furnace (EAF) steelmaking. Unlike previous studies that primarily addressed either viscosity or surface tension effects, the present work integrated experimental measurements with thermodynamic modelling to provide a comprehensive understanding of slag foaming mechanisms. The experiments revealed that increasing FeO content lowered foam stability, whilst higher basicity promoted network depolymerisation and enhanced foaming under specific viscosity windows. The results demonstrated a strong correlation between foam height, viscosity, and surface tension, highlighting the existence of an optimum viscosity (~ 41 mPa&#xa0;s) at which slag foaming was maximized. Comparisons with earlier works confirm the amphoteric role of FeO and the non-linear influence of basicity. The formation of solid phases was further confirmed, and their effect on bubble stability was evaluated. These findings provide novel insights into the interplay of thermophysical parameters governing slag foaming, offering practical guidance for optimizing slag design in decarbonized steelmaking routes.</p>

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Experimental Study on the Effects of FeO Content and Basicity on Slag Foaming

  • 期刊论文

  • 发表日期：

    2026年7月1日

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  • Xingwen Wei,
  • Tetiana Shyrokykh,
  • Yuri Korobeinikov,
  • Seetharaman Sridhar

摘要

This study systematically investigated the combined influence of FeO content and basicity on slag foaming behaviour in Electric Arc Furnace (EAF) steelmaking. Unlike previous studies that primarily addressed either viscosity or surface tension effects, the present work integrated experimental measurements with thermodynamic modelling to provide a comprehensive understanding of slag foaming mechanisms. The experiments revealed that increasing FeO content lowered foam stability, whilst higher basicity promoted network depolymerisation and enhanced foaming under specific viscosity windows. The results demonstrated a strong correlation between foam height, viscosity, and surface tension, highlighting the existence of an optimum viscosity (~ 41 mPa s) at which slag foaming was maximized. Comparisons with earlier works confirm the amphoteric role of FeO and the non-linear influence of basicity. The formation of solid phases was further confirmed, and their effect on bubble stability was evaluated. These findings provide novel insights into the interplay of thermophysical parameters governing slag foaming, offering practical guidance for optimizing slag design in decarbonized steelmaking routes.