Ukuthola i-aluminium kusuka ku-bauxite ngokuvamile kusho ukuphuma ku-aluminium trioxide kusuka ku-bauxite. Ukuze kufinyelelwe injongo kunezindlela ezintathu ezifaka: indlela ye-asidi, indlela ye-alkali, indlela ehlanganisiwe ye-acid-base kanye nendlela yokushisa. Kodwa-ke, indlela ye-asidi, indlela ehlanganisiwe ye-acid-base kanye nendlela yokushisa azisetshenziswa ngobuningi embonini ngenxa yokuphepha kanye nezinzuzo zomnotho. Indlela ye-alkali isetshenziswa ekukhiqizweni kwezimboni.

Kunezindlela ezintathu zokukhipha i-alumina trioxide kusetshenziswa indlela ye-alkaline okuyi-calcination method, i-bayer method kanye ne-combined method. Sizothatha indlela ye-calcination njengesibonelo.

Indlela yokubala: Ukufaka inani elithile le-calcium carbonate ku-bauxite, into eyingxenye yayo eyinhloko yi-sodium aluminate yakhiwa ngemuva kokubala izinga lokushisa eliphezulu kuhhavini ojikelezayo. Ekugcineni i-alumina itholakala ngemuva kokuncibilika, ukwakheka kwekristalu kanye nokuthosa.