Abstract
The interdiffusivity of FeO-CaO in the liquid FeO-CaO-SiO2 slag contained in an iron crucible has been measured in the temperature range 1573 to 1673 K using the electrochemical method. The experimental technique was the chrono-potentiometry at constant currents using the following cell:
(This article is not displayable. Please see full text pdf.)
\
oindentSlags contain 21 to 32 mol%FeO and 32 to 52 mol%SiO2.
The interdiffusivity varies from 1.6×10−11 to 3.9×10−10 m2 s−1 at 1573 K, 2.7×10−11 to 5.8×10−10 m2 s−1 at 1623 K and 4.3×10−11 to 8.9×10−10 m2 s−1 at 1673 K, depending on the silica content of the slag. The interdiffusivity is inversely proportional to the viscosity. These results show that the interdiffusivity is governed by the silicate structure and the amount of silicate.
