Estimation of Quasibinary Interdiffusivities in Multicomponent Slags for Iromaking and Steelmaking
Kazuhiro NAGATA, Kazuhiro S. GOTO
The quasibinary interdiffusivities of CaO-SiO2, Al2O3-SiO2 and CaO-Al2O3 in the CaO-SiO2-Al2O3 liquid slag and those of CaO-SiO2, FeO-SiO2 and CaO-FeO in the CaO-SiO2-FeO liquid slag which is in equilibrium with iron at 1 500°C have been calculated by means of the following equation for cationic conductor;. The cationic tracer diffusivities, in the all range of liquid composition of the both slag systems have been estimated from the relation between the viscosity and the tracer diffusivity.
The order of the quasibinary interdiffusivities in CaO-SiO2-Al2O3 and CaO-Si02-FeO slags are 10-7 and 10-6cm2/sec at 1 500°C, respectively.The quasibinary interdiffusivities at 1600°C are 2.5 and 1.5 times as much as those at 1 500°C for the blast furnace type slag and the steelmaking type slag, respectively. The accuracies are about ±0.5 and ±1.0 in common logarithms, respectively.
The ways to use the quasibinary interdiffusivities for the practical problems have been discussed.
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Tetsu-to-Hagané Vol.62(1976), No.9