溶融 CaO-SiO_2-Al_2O_3 系スラグにおける水蒸気溶解度および溶解速度

概要

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The solubility of water vapor and the rate of water vapor dissolution in liquid CaO-SiO_2-Al_2O_3 slags have been measured at 1400℃ by a sampling method. From the results obtained, solubilities of water in slags were shown with water-vapor capacity, defined by K′=(%H_2O)_s/√<P_<H_2O>>. The apparent rate of water vapor dissolution was independent of the flow rate of Ar-H_2O gas mixture over the range of 200∿910ml/min. The dissolved water content was a linear function of the square root of time during the initial period of dissolution with a slope proportional to the square root of P_<H_2O> in the gas. Consequently, the reaction would be controlled by the non-steady-state diffusion of H_2O in the bulk slag. The obtained apparent diffusion coefficient of water vapor, D_<H_2O>, in 44mol% CaO-44mol%SiO_2-12mol%Al_2O_3 slag at 1400℃ was 1.9×10^<-5>cm^2/s. The effects of slag composition, such as alumina content or basicity and temperature on D_<H_2O> were discussed.
社団法人日本鉄鋼協会の論文
1985-01-01