The influence of soda additive on the thermal properties of red mud

Abstract

The dehydration and decomposition of the red mud from Seydisehir Aluminum factory, mixed with soda were investigated under dynamic and isothermal conditions. Soda was added to the red mud samples as much as 50, 100 and 150 mass% of Na2CO3 of the red mud sample's mass. To determine the effect of soda additive on the red mud's thermal properties, using TG and DTA techniques simultaneously under atmospheric conditions. Furthermore, the original red mud sample's XRD and IR spectrum curves were investigated. It seems that the temperatures of the endothermic peaks of the red mud decreased with the amount of soda added. However the endothermic peak's temperature readings showed that the melting of soda increased gradually with the quantity of soda used.