Izitena eziphakamileyo{0}}ze-alumina zahlulwa ngokweziqulatho ze-alumina zibe: IBanga le-III (Al₂O₃: 48–65%), iBanga II (Al₂O₃: 65–75%), iBanga I (Al₂O₃: 75–80%), kunye neBanga eliKhethekileyo (Al₂O₃) elilingana ne-Greater than ₃ okanye .
Zihlelwa ngokohlobo lweziko ezisetyenziswa: ukutshiza-okunganyangekiyo okuphezulu{1}}kwizitena ze-alumina ze-sement, eziphantsi{2}}zirhubuluza phezulu{3}}izitena ze-alumina kwizitovu ezishushu, kunye nephosphates ephezulu{5}}yezitena ze-alumina ze-alumina ze-lithius oksayidi, i-zincoxide ye-zinc imveliso ye-oxide).
Ngokusekwe kwimilo kunye nemilinganiselo, ziquka imela{0}ezimileyo,{1}}ezimile okwezembe, kunye{2}}nemilo yezitena ezimile, kunye{3}}nezitena eziphezulu ze-alumina zeskew kunye nezitena zeankile.
Iindidi zikwabandakanya izitena eziqhelekileyo, izitena ezimile, kunye nezitena ezenziwe ngokukodwa.