What question did this study set out to answer?

The research aims to accurately measure and model the surface tension of a specific multicomponent slag system.

February 19, 2026Open Access

Experimental Determination and Model Prediction of the Surface Tension of CaO-SiO2-MgO-Al2O3-CaF2 Slag

Key Points

The research aims to accurately measure and model the surface tension of a specific multicomponent slag system.
Measured surface tension using the hanging ring method.
Established an activity prediction model based on ion and molecular coexistence theory.
Analyzed the effects of basicity and mass ratios of components on surface tension.
Surface tension increases with higher values of basicity R, the MgO/Al2O3 mass ratio, and Al2O3 content.
The proposed model shows high predictive accuracy for the surface tension of the slag.

Abstract

In this study, the surface tension of molten slag was measured using the hanging ring method. Based on the ion and molecular coexistence theory (IMCT), an activity prediction model for the CaO-SiO2-MgO-Al2O3-CaF2 slag system was established, and a corresponding surface tension model was subsequently derived. The investigation explores the effects of basicity R = (w(CaO)/w(SiO2)), the mass ratio w(MgO)/w(Al2O3), and the Al2O3 mass fraction (w, mass fraction of the corresponding oxide). Results show that the surface tension increases with higher values of R, w(MgO)/w(Al2O3), and w(Al2O3) content. The proposed model exhibits high predictive accuracy and provides a reliable tool for evaluating the surface tension of multicomponent blast furnace slags.

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Cite This Study

Ding et al. (Mon,) studied this question.

synapsesocial.com/papers/6996a80aecb39a600b3ee615 https://doi.org/https://doi.org/10.3390/met16020227

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