The smelting of alumina (aluminum oxide)  to aluminum in the smelter uses an electrolysis process (Hall-Héroult process) that uses electricity for heating and reduction and thus the carbon electrode is not consumed.

Alumina (Aluminum oxide) is a fine black power.

Nearly pure molten aluminum is taken from the smelter to the casthouse for alloying (if required) and then cast into sow, ingots, billets, or slab depending on customer requirements.

Bauxite is converted to Alumina (Aluminum oxide)  through several mechanical and chemical processing stages.