Kinetics of Reaction between Iron Oxide Slags and Solid Carbon

Abstract

Rates and mechanism of redcution of molten iron oxide slags with solid carbon in the temperature range from 1400°C to 1600°C have been studied. The volume of evolved CO gas as a product has been indicated on a gas flow meter, and recorded photographically. For FeO-10wt%SiO₂ slag, the reduction is controlled by chemical reaction in the range where solid SiO₂ does not precipitate and is controlled by FeO transport process after the range where solid SiO₂ pecipitates. For FeO-CaO slag, the temperature dependency on reaction rates is negligibly small, and the product is very porous. The reaction takes place in the form of a chain of reaction consisting in reduction by CO gas and the Boudouard reaction.