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<p>This study investigates the wetting behavior of electrolyte melts on aluminosilicate refractory substrates under ladle operating conditions (870 ℃–910&#xa0;°C, argon atmosphere) using the sessile drop method. Interfacial dynamics are quantitatively characterized through real-time contact angle evolution and dimensionless height factor analysis, with post-wetting reaction products systematically identified via X-ray Diffraction, scanning electron microscopy, and energy-dispersive spectroscopy. Results demonstrate a temperature-dependent wetting enhancement: at 890℃-910℃, the droplet apparent contact angle changes linearly with increasing temperature, and the time for complete spreading decreases from 18.5&#xa0;min to 7.3&#xa0;min. Interfacial reaction intensity, quantified by NaAlSiO<sub>4</sub> phase content, shows a direct correlation with temperature-induced elemental interdiffusion. The predominant adhesion mechanism involves reaction wetting through nepheline formation at Al<sub>2</sub>O<sub>3</sub>-SiO<sub>2</sub>-Na<sub>3</sub>AlF<sub>6</sub> triple junctions, causing catastrophic interfacial failure. These findings conclusively demonstrate the incompatibility of aluminosilicate refractories for ladles, providing quantitative criteria for next-generation anti-adhesion refractory design.</p>

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Wetting of electrolyte melt on aluminosilicate refractory at 870℃–910℃

  • 期刊论文

  • 发表日期：

    2025年10月8日

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  • Xin Lyu,
  • Zhiyuan Rui,
  • Haobo Sun,
  • Chao Mei,
  • Wandong Cheng,
  • Kang Lu,
  • Yun Dong

摘要

This study investigates the wetting behavior of electrolyte melts on aluminosilicate refractory substrates under ladle operating conditions (870 ℃–910 °C, argon atmosphere) using the sessile drop method. Interfacial dynamics are quantitatively characterized through real-time contact angle evolution and dimensionless height factor analysis, with post-wetting reaction products systematically identified via X-ray Diffraction, scanning electron microscopy, and energy-dispersive spectroscopy. Results demonstrate a temperature-dependent wetting enhancement: at 890℃-910℃, the droplet apparent contact angle changes linearly with increasing temperature, and the time for complete spreading decreases from 18.5 min to 7.3 min. Interfacial reaction intensity, quantified by NaAlSiO4 phase content, shows a direct correlation with temperature-induced elemental interdiffusion. The predominant adhesion mechanism involves reaction wetting through nepheline formation at Al2O3-SiO2-Na3AlF6 triple junctions, causing catastrophic interfacial failure. These findings conclusively demonstrate the incompatibility of aluminosilicate refractories for ladles, providing quantitative criteria for next-generation anti-adhesion refractory design.