Reduction Kinetics Analysis of Fe2O3 in the Case of Carbon Precipitation

Abstract

The reduction kinetics of Fe2O3 (purity 99.9%) in the case of carbon precipitation is investigated using the isothermal thermogravimetric (TG) analysis controlled gas-base reduction. The TG curves are recorded in the experimental process, and the conversion rate, reaction rate, reduction rate, and other parameters are calculated through experimental data. The results show that the carbon precipitated evolution process from CO is accelerated in the FeO → Fe stage, and the sample weight increased obviously. Based on the lnln method, the reaction mechanism function is G(α) = [−ln(1 − α)]1/2, and the reaction activation energy is 43.4 kJ/mol.