Aluminium Sulphate Manufacturing Process
Bauxite mining: Bauxite, the primary source of aluminium, is extracted from open-pit mines.
Bauxite processing: Bauxite is processed to extract alumina (aluminium oxide) using the Bayer process, which involves crushing the bauxite and treating it with sodium hydroxide at high temperatures.
Calcination: Alumina is heated at high temperatures to remove moisture and convert it into aluminium oxide.
Reacting with sulfuric acid: Aluminium oxide reacts with sulfuric acid to produce aluminium sulphate and water:
Al2O3 + 3H2SO4 → Al2(SO4)3 + 3H2O
Crystallization and drying: The resulting aluminium sulphate solution is cooled to allow the formation of solid crystals. The crystals are separated, washed, and dried to obtain the final aluminium sulphate product.
Granulation (optional): The dried aluminium sulphate crystals may undergo a granulation process to produce granules or pellets for easier handling.
