Mathematical Model of the Shaft Furnace for Reduction of Iron-Ore Pellet

Abstract

A mathematical model of the shaft furnace is developed for gaseous reduction of iron-ore pellet. In the model, the reduction of iron-oxide is defined as the multi-stage successive reaction and the reduction rate equations are derived from the multi-interface core model in a single pellet.
This model is applied to the simulation for the changes of reduction degree in an experimental shaft furnace which has 0.1 m in diameter and 4.0 m in height. It has been found that the model is able to simulate well the reduction behavior in the furnace and the rate constants obtained from the simulation calculation of the experimental data are nearly close to those of the former literature about the fundamental research of the reduction of iron-ore pellets.