Red Mud uses from Alumina Production
Review on utilization of Red Mud Red mud is solid waste which is produced as residue during the manufacturing of alumina . Alumina is produce from bauxite ore. About 35-40% of bauxite is converted into waste as alkaline red mud during alumina production which contains 15-40% solid. A large amount of red mud is produced every year during alumina production. Red mud is discharged on to the ground as slurry near production plant, in ponds or nearby sea. It contains several metal oxides like Fe 2 O 3 , Na 2 O, SiO 2 , CaO, and Al 2 O 3. Red mud has alkaline pH greater than 10. Due to presence of heavy metals and alkaline pH, the disposal of huge amount of red mud lead to serious environmental problems like soil contamination, ground water pollution and particle suspension in sea. Also disposal of red mud cost very high. Therefore it is necessary to find alternative solution for red mud solid waste so that it cannot cause harmful effects to environment. Alumina is produced by