Abstract
Thermal and reaction characteristics were studied of the sulfuric acid digestion of ilmenite are (FeTiO3) in a small batch stirred-tank reactor. With a treatment of relatively large are particles first, the digestion process was found to becharacterized through the fracture of particles owing to the growth of iron sulphate crystals in an ore. Then, by processing small particles in a 70vol% sulfuric acid solution with the initial temperature range from 120 to 160°C, the sequential changes were observed in the extent of conversion for titaniuand iron, with temperature. Simulation for the thermal and reaction features along the course proved to besuccessful with a volume reaction model in which the are particles were grouped into three for titanium and two for iron due to difference in reactivity.
