| Abstract Scope |
Bauxite residue, a highly alkaline by-product, contains valuable oxides of iron, aluminum, titanium, sodium, calcium, and silicon. Extracting alumina and soda from Bauxite residue is crucial for resource utilization and environmental protection. This research focuses on optimizing key parameters such as roasting temperature, roasting time, and the weight percentage of soda and CaO, as well as leaching duration, to maximize alumina and soda recovery from high titanium bauxite residue. The process involves sodium hydroxide roasting, followed by water leaching. The study examined the effects of NaOH, and CaO dosage, along with roasting temperature and time, on alumina and soda recovery, as well as the mineral formation within the residue. Using XRF, XRD, and SEM-EDS methods, the investigation identified dominant phases in the roasted sample. Under optimal conditions, the recovery percentages were 79.3% for Al2O3 and 70% for Na2O. The final de-aluminized and dealkalized product is rich in iron and titanium. |