Aluminium formed is taken out through electrolysis

Aluminium formed is taken out through electrolysis. It is then frequently taken out for consequent casting process. In every pot, direct electric current flows following the following sequence: it passes from carbon anodes, through cryolite bath, to carbon cathode, and then to the carbon anodes of the subsequent pot. The gaps between the anodes in the pot are filled with the electrolyte that is made up of molten cryolite having dissolved aluminium oxide. Cryolite (Na₃AlF₆) is the best electrolyte in this process because its melting point is satisfactorily low, it has low vapour pressure, lower density than that of molten aluminium, and it is more resistant to reaction with either carbon or aluminium.