Reduction Behavior of the Mixture of Iron Ore and Carbonaceous Material at High Temperatures

Abstract

Reduction and gasification rates of mixtures of fine iron are and coal char were measured for some types of coal char and ore at temperature from 940°C to 1340°C. Experiments were carried out with an electric furnace by measuring weight losses of samples and gas composition during reaction. The reduction rates were obtained by separating the weight loss of the fine iron ore reduction from that of the coal char gasification. The overall reduction rate of the mixture was controlled by the coal char gasification at 940°C and by the iron ore reduction at 1340°C. The reduction rate of fine iron ore and the gasification rate of coal char were formulated as functions of the particle size, type of raw material, and temperature.