Saray high-alumina bricks et sakey a klase na kurti na ag-onlelereg a materyales ya nagawa diad pangipaputok na ag-onlelereg a pitek odino arum nin ag-onlelereg iran materyales ed atagey a temperatura; kabiangan ira na pamilya na produkton aluminosilicate. Saray refractory bricks et saray inorganic ya aliwan metal ya materyales ya walad nanduruman klase, kaiba lay high-alumina, clay, magnesia, corundum, mullite, tan silicon carbide bricks. Lapud mas maong so inka-refractory da, saray high-alumina bricks et mabetbet ya uusaren ed nanduruman klase na refractory bricks. Unong ed saray estandarte parad saray atagey ya -alumina refractory materials, say Al2O3 content so manunan kriterya na klasipikasyon. Diad espisipiko, saray atagey-alumina bricks et naapag ed taloran grado: Grado I (Al₂O3 content > 75%), Grado II (Al₂O3 content ed baetan na 60% anggad 75%), tan Grade III (Al₂O3 content ed baetan na 48% anggad 60%).
Bilang sakey a klase na materyal ya ag-onlelereg, saray laryo ya high-alumina et manunan tugyopen na Al2O3. No ikompara ed clay bricks tan semi-silica bricks, saray high-alumina bricks et mas atagey so inka-refractory da kanian niklasipikan ira bilang high-grade refractory materials. Say atagey ya Al2O3 ya laman da et mangiiter ed sikara na ngalngalin-neutral iran katangian, ya mamapawala na epektibon resistensya ed erosion na parehon acidic tan basic slags. Balet, nepeg ya imanoen ya anggaman walay SiO2 da, say resistensya ra ed basic slag et medyo abeba nen say resistensya ra ed acidic slag. Base ed Al₂O3 content, saray high-alumina bricks et nayarin naapag ed saray grado a singa say 55, 65, 75, tan 80.
Saray atagey ya -alumina bricks et naklasipikar ed nanduruman grado base ed Al2O3 (aluminum oxide) ya karga to. Diad saratan, saray corundum bricks-ya walay aluminum content ya 90% o mas atagey ni- so mangirerepresenta ed sankatageyan ya tier na atagey-a alumina bricks. Saray "Special grade" high-alumina bricks et walaan na ag-onkulang ed 85% ya aluminum, bangta saray Grade I bricks et walaan na masulok ya 75%; Saray Grade II tan Grade III ya laryo et walaan na ag-onkulang ed 65% tan 55% ya aluminum, unong ed inkauksoy da. Sarayan nanduruman grado et mangiyoopresi na nanduruman refractory properties pian nasumpal so nanduruman pankaukolan na industriya. Saray high-alumina bricks et sakey a klase na aluminosilicate refractory product ya walaan na aluminum oxide (Al₂O3) ya masulok ya 48%. No say Al2O3 et onsabi ed 90% o mas atagey ni, saratan so niklasipika bilang corundum bricks-sakey a klase na high-alumina brick ya walaan na nikadkaduman refractory performance. Nepeg ya imanoen ya saray estandarte parad atagey ya -alumina bricks et nayarin manduruma ed nanduruman bansa lapud pandumaan na saray naala.
Singa bilang, diad saray bansa ed Europa, say sankaabebaan ya Al2O3 parad saray atagey ya -alumina refractory materials et 42%. Balet diad China, saray laryo ya high-alumina et kaslakan ya naapag ed taloran grado: Saray Grade I ya laryo et walaan na masulok ya 75% ya Al₂O3; Saray Grade II ya laryo et walaan na manlapud 60% anggad 75% ya Al2O3; tan saray Grade III ya laryo et walaan na manlapud 48% anggad 60% ya Al2O3.