Intshayelelo kuhlelo lwe izitena eziphezulu ze-alumina refractory ngokomxholo we-Al2O3

Izitena eziphezulu ze-alumina ezichasayo zihlulwe zibe ngamabakala amathathu ngokomxholo we-Al2O3: Iklasi I (Al2O3> 75%); Iklasi II (Al2O3 yi-60% ~ 75%); Udidi III (Al2O3 yi-48% ~ 60%). Ngokutsho kokwakhiwa kwamaminerali, inokwahlulwa ibe: i-mullite ephantsi (kubandakanywa ne-sillimanite) kunye ne-mullite (Al2O3 yi-48% ~ 71.8%), i-mullite-corundum kunye ne-corundum-mullite (Al2O3 yi-71.8% ~ 95%), i-corundum (Al2O3) yi-95% ~ 100%) kunye nezinye izitena eziphikisayo.