Hydrogen reduction of magnetite concentrate particles

The reaction kinetics of hydrogen reduction of iron ore concentrate particles was studied in the present research work. Thermogravimetric analysis was used to study the reaction progress at temperature range of 700-900 degrees C. Various methods were used to obtain the governing mechanism and reaction rate constant. It was resulted that, the reduction rate of ore concentrate was between the reduction rates of pure magnetite and pure wustite. The experimental work showed that, hydrogen reduction of magnetite to wustite has the greatest chance of occurrence at temperature range over 700 degrees C. The reduction reaction can occur as a single-step reaction above 1000 degrees C. The first-order reaction was a very important model for this reduction at the studied temperature range. Finally, the activation energy was obtained about 29.48 kJ.mol(-1) .