Isitini se-alumina ye-alumina esingenalutho / isitini sebhamuza se-Alumina siwumkhiqizo we-alumina olula owenziwe nge-alumina yezimboni ngendlela yokuncibilika.Izitini ezingasindi ze-refractory zokufakelwa ezenziwe nge-bulb engenalutho zingasetshenziswa njengama-linings ezithandweni zokushisa okuphezulu ezithintana ngqo namalangabi.
Eyethuamapuleti pushfuthiiziphambanobabe nezinzuzo zokuqukethwe okuphezulu kwe-alumina, okuqukethwe kokungcola okuphansi, ukumelana nokushisa okuphezulu, ukuzinza okuhle kokushaqeka kokushisa kanye ne-coefficient ephansi yokwandisa.