Ukufumana i-aluminium kwi-bauxite kudla ngokuthetha ukuphuma kwi-aluminium trioxide kwi-bauxite. Ukuze kufikelelwe kule njongo kukho iindlela ezintathu eziquka: indlela ye-asidi, indlela ye-alkali, indlela edibeneyo ye-asidi kunye nendlela yobushushu. Nangona kunjalo, indlela ye-asidi, indlela edibeneyo ye-asidi kunye nendlela yobushushu azisetyenziswa ngobuninzi kushishino ngenxa yokhuseleko kunye neenzuzo zoqoqosho. Indlela ye-alkali isetyenziswa kwimveliso yemizi-mveliso.

Kukho iindlela ezi-3 zokukhupha i-alumina trioxide kusetyenziswa indlela ye-alkaline, ezizezi: indlela ye-calcination, indlela ye-bayer kunye nendlela edibeneyo. Siza kuthatha indlela ye-calcination njengomzekelo.

Indlela yokubala: Ukufaka isixa esithile se-calcium carbonate kwi-bauxite, into eyinxalenye yayo ephambili yi-sodium aluminate yenziwa emva kokubala ngobushushu obuphezulu kwi-oven ejikelezayo. Ekugqibeleni i-alumina ifunyanwa emva kokunyibilika, ukwakheka ngekristale kunye nokugcadwa.