The comparison of the bayer process wastes on the base of chemical and physical properties

In this work, the waste materials from the Aughinish (in Ireland) and the Seydisehir (formerly ETI Aluminium Inc. in Turkey) alumina plants were compared on the base of chemical and the physical properties using thermal analysis, XRD and SEM techniques. The results were shown that there are big differences in the chemical compositions of the red mud waste as well as the physical properties. It was found that the Seydisehir red mud is more feasible for recovery of iron, but the Aughinish sample contains more titanium oxide than the Seydisehir one. There are also some variations in the Bayer process of the plants since the calcium and sodium oxides of the waste were different percentages.