Kuwana aruminiyamu kubva ku bauxite kunowanzoreva kusiya aruminiyamu trioxide kubva ku bauxite. Kuti usvike pachinangwa ichi pane nzira nhatu dzinosanganisira: nzira yeasidhi, nzira yealkali, nzira yeacid-base combined uye nzira yekupisa. Zvisinei, nzira yeacid, nzira yeacid-base combined uye nzira yekupisa hazvishandiswe zvakanyanya muindasitiri nekuda kwekuchengetedzwa uye mabhenefiti ehupfumi. Nzira yealkali inoshandiswa mukugadzirwa kwemaindasitiri.

Kune nzira nhatu dzekubvisa alumina trioxide uchishandisa nzira yealkaline dzinoti nzira ye calcination, nzira ye bayer uye nzira yakabatana. Tichatora nzira ye calcination semuenzaniso.

Nzira yekuverenga calcium: Kuisa huwandu hwakati hwecalcium carbonate mubauxite, chinhu chine chikamu chikuru chesodium aluminate chinoumbwa mushure mekuverenga calcium muchoto chinotenderera. Pakupedzisira alumina inowanikwa mushure mekunyungudika, kupenya uye kugochwa.