RATE OF REDUCTION OF SILICA IN SLAG BY CARBON IN LIQUID IRON.

Abstract

Effect of slag composition was ascribed to the change in activity of silica. Apparent activation energies were about 100 kcal/mol for binary slags and 70 to 85 kcal/mol for ternary slags. The rate of the reduction increased linearly with the ratio of slag - graphite to slag - metal interfacial area in the low ratio region. It was found from this result that the anodic reaction occurred at both slag - metal and slag - graphite interfaces, and that the interfacial reaction is the rate-determining step. The rate of reduction in argon atmosphere was about twice as fast as that in CO atmosphere.