Abstract
The viscosities and free-running temperatures of slag in a La2O3-SiO2-Al2O3 slag system were measured using an internal rotating cylinder method. For different La2O3 mass contents (45, 50, and 55 pct) in the La2O3-SiO2-Al2O3 ternary slag, the slag viscosity and free-running temperature decreased with a decrease in SiO2 content and an increase in Al2O3 content, and decreased with an increase in La2O3 content. Minor components B2O3, FeO, and MnO could decrease the viscosity and free-running temperature of La2O3-SiO2-Al2O3 ternary slag, especially FeO, and a small amount of FeO and B2O3 had an additive effect on slag viscosity and free-running temperature reduction.
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