Kupeza aluminium kuchokera ku bauxite nthawi zambiri kumatanthauza kuchotsa aluminium trioxide kuchokera ku bauxite.Pofuna kukwaniritsa cholingacho pali njira zitatu monga: njira ya asidi, njira ya alkali, njira yophatikizira ya asidi ndi njira yotentha.Komabe, njira ya asidi, njira yophatikizira ya asidi ndi njira yotenthetsera sizigwiritsidwa ntchito mochulukirapo m'makampani chifukwa cha chitetezo ndi phindu lazachuma.Njira ya alkaline imagwiritsidwa ntchito popanga mafakitale.

Pali njira zitatu zochotsera alumina trioxide pogwiritsa ntchito njira zamchere zomwe ndi njira ya calcination, njira ya bayer ndi njira yophatikiza.Tidzatenga njira ya calcination monga chitsanzo.

Njira yowerengetsera: Kuyika kashiamu ka carbonate mu bauxite, chinthu chomwe chigawo chake chachikulu ndi sodium aluminate chimapangidwa pambuyo pa kutentha kwakukulu mu ng'anjo yozungulira.Pomaliza aluminiyamu amapezedwa pambuyo kusungunuka, crystallization ndi kukazinga.