Reduction of Briquetting Waste Fine El-Dekhila Iron Ore Pellets (Egypt)

In the present work, an attempt has been made to study the reduction behavior and kinetics of briquette waste fired ElDekhaila iron ore briquette. The effect of different reduction parameters such as temperature and hydrogen flow rate also, the effect of drop damage resistance, applied pressure and compressive strength was studied. Reduction of briquetting fine waste El-Dekhaila pellets by hydrogen is carried out in the temperature range 700 to 1000 C. In the reduction kinetic study, the most satisfactory model is to take the slope of the initial linear region of fractional reduction vs. time curve as a measure of rate constant (k) and ln k vs. 1/T plots are straight line from which activation energy was calculated. In kinetic studies relating to reduction of ores, a mechanism is assumed that correlates time (t) to conversion (R): R=F (t) The most satisfactory model is that which gives the higher R coefficient on plotting F (R) against (t). Keywords— Fired briquetting waste El-Dekhaila fine pellets, reduction kinetics, diffusion model, energy of activation.