Abstract
The measurement of the interfacial tension between a molten lime -alumina -silica slag and a molten iron saturated with carbon was done in order to know the characteristics of the reaction, (SiO2) +2Fe=Si+2 (FeO), at the slag-metal interface. The results showed as follows;
(1) The concentration of iron oxide in slags changed the interfacial tension between the slag and the metal, and it suggests that the interface potential for the slag-iron (saturated with carbon) system was mainly determined by the concentration of iron oxide in slags.
(2) Electrical double layer at slag-metal interface may be formed by negative excess charge at the metal surface and possitive excess charge at the slag side. And the excess possitive charge may be induced by the existance of Fe2+ cations adsorbed at the metal surface.
