A Combined Soda Sintering and Microwave Reductive Roasting Process of Bauxite Residue for Iron Recovery

In this study an integrated process is presented as a suitable method to transform Fe3+ oxides present in bauxite residue into magnetic and metallic iron through microwave roasting reduction, avoiding the formation of hercynite (FeAl2O4). first step, all alumina phases were transformed sodium aluminates by adding carbonate flux BR then leached out alkali-leaching recover alumina. Subsequently, leaching was mixed with carbon roasted using furnace at optimum conditions. The oxide sinter converted (98%). addition, not detected. produced cinder subjected wet high intensity separation separate from other elements.