Solubility and Dissolution Rate of Water Vapor in Liquid CaO-Si0₂-Mg0 and CaO-SiO₂-TiO₂ Slags

Abstract

The solubility of water vapor and the rate of water vapor dissolution in liquid CaO-SiO₂-MgO and CaO-SiO₂-TiO₂ slags have been measured by a sampling method.
The solubilities of water in slags at 1 450°C were shown with water-vapor capacity, defined by log K'=log {(%H₂O)_s√P_H2O}.
The water vapor dissolution in these liquid slags would be controlled by diffusion of H₂O in the bulk slag the same as in the CaO-SiO₂-Al₂O₃ system. The apparent diffusion coefficient of water vapor, DH₂O, was evaluated and the effects of slag composition, such as basicity, MgO or TiO₂ content and temperature on DH₂O were discussed.