Selective sulfidising roasting for the removal of chrome spinel impurities from weathered ilmenite ore

The purpose of this study was to investigate the thermodynamic prospect of selective chrome spinel sulfidation followed by a targeted experimental investigation of the kinetics of chromite sulfidation. A secondary aim was to then employ the selective chrome spinel sulfidation conditions to the existing Becher process for producing a feed suitable for pigment production with the objective being to separate the sulfidised chrome spinels via physical separation techniques such as froth flotation and magnetic separation. The outcome of this research will help to treat the low grade-weathered ilmenite ore which are potential as feedstock for sulphate route TiO2 pigment production.