Njerwa zapamwamba za alumina kalasi yoyamba

Njerwa zapamwamba za alumina zimagawidwa m’magulu atatu. Njerwa yoyamba ya alumina yapamwamba imakhala ndi AL2O3≥75%, njerwa yachiwiri yapamwamba ya alumina AL2O3≥65, ndi njerwa yachitatu yapamwamba ya alumina AL2O3≥55. Pakati pawo, pali ubale wosalekanitsidwa ndi zopangira. Nthawi zambiri pa zopangira. Magiredi atatuwa ndi zida za silicon-aluminium zomwe zimayimira zida zokanira zimayimiranso milingo yofananira ya ufa wabwino kwambiri wa aluminiyamu ndi magulu a aluminiyamu apamwamba.