Bath Material is the electrolyte used in the Hall-Héroult process to produce primary aluminium. It’s also known as Secondary Cryolite, Crushed Bath, Bath Cryolite, Pure Bath, Bath and tapped Bath Material.
During the aluminium smelting process, surplus Bath Material can be generated because of high Sodium (Na) content in the alumina. This surplus is tapped in a liquid form and then crushed to be reused to start up new pots or to compensate for electrolyte losses.
Requirement of Pure Tapped Bath, 1000-1500 Tons