What is Red Mud?

  • In a step towards productive utilization of bauxite residue, commonly known as the ‘Red Mud’, an interactive workshop called ‘Waste To Wealth’ was organized by Ministry of Mines in New Delhi.
  • Red mud is a side-product of the Bayer process, the principal means of refining bauxite en route to alumina.
  • This is an environmental concern due to presence of impurities such as caustic soda and others minerals.
  • Global generation of red mud is more than 150 million tons and there exists a global inventory of more than 3 billion tons.
  • It is composed of a mixture of solid and metallic oxides. The red colour arises from iron oxides, which comprise up to 60% of the mass.
  • The mud is highly basic with a pH ranging from 10 to 13. In addition to iron, the other dominant components include silica, unleached residual alumina, and titanium oxide.