Effect of Magnesium on the Mineral Phase Composition of Ilmenite in CO-CO2 Atmosphere Under Various Conditions

Avoiding the formation of anosovite phase during the ilmenite reduction process is crucial for the preparation of boiling chloride stove. In this study, the dominant regions of different reduction products of ilmenite in CO-CO 2 system and the phase transformation behavior of pure ilmenite in the reduction process were studied by XRD and SEM-EDS analysis. It was confirmed that the reduction of ilmenite (FeTiO 3 ) at < 1150°C went through two stages: the formation of metal iron (Fe) with rutile (TiO 2 ) and metal iron (Fe) with anosovite (Ti 3 O 5 ). At > 1150°C, the reduction of ilmenite went through two stages: the formation of metal iron (Fe) with pseudobrookite (FeTi 2 O 5 ) and metal iron (Fe) with anosovite (Ti 3 O 5 ). As a typical ilmenite resource, Panzhihua ilmenite is used to study the reduction behavior of actual ore in CO-CO 2 system. The reaction of forming metal iron (Fe) with pseudobrookite (FeTi 2 O 5 ) could occur at 1000°C, and magnesium was dissolved in the product during the formation of anosovite. The presence of magnesium reduces the dominant area of metal iron (Fe) with rutile (TiO 2 ), which is not conducive to the reduction of iron.