Ol brik we i gat bikpela 'alumina' em i wanpela kain samting we i no inap kukim paia we i gat 'aluminium oxide' (Al2O3).
Bricks with an Al₂O₃ content exceeding 90% are classified as corundum bricks. Standards vary by country due to differences in available resources; for instance, European standards set the minimum Al₂O₃ content for high-alumina refractories at 42%. In China, high-alumina bricks are typically categorized into three grades based on Al₂O₃ content: Grade I (>75%), Gret II (60-75%), na Gret III (48-60%).
Dispela em ol 'aluminosilicate refractory' prodak we i gat 'aluminium oxide' (Al2O3) insait long en we i winim 48%.
Ol i wanpela kain 'neutral refractory' samting we i gat 'alumina' insait long en we i winim 48 pesen, na ol i wokim long rot bilong sepim na 'calcine' 'bauxite' o ol narapela samting we i gat planti 'alumina' long en. Ol i soim bikpela 'thermal stability' na 'refractoriness' i winim 1770 digri. Wantaim gutpela 'slag resistance', ol i save yusim long lainim ol 'electric steelmaking furnaces', 'glass melting furnaces', na ol 'cement rotary kilns'.
Ol 'high-loading-softening, low-creep high-alumina bricks [1] em ol gutpela 'refractory materials' we ol i wokim long spesel-greid 'bauxite', 'fused corundum', na 'fused mullite'. Ol dispela brik i gat ol gutpela samting olsem liklik hai-temperature krip, strongpela erosen resistens, na gutpela 'thermal shock stability'.
Em i gutpela long ol bikpela na namel sais - hot blast stov, ol i makim wanpela gutpela step i go long domestik prodaksen bilong ol hai-kwaliti, hai-greid refrakteri materiel we ol i bin kisim i kam long ol nupela-jeneresen hot blast stov bilong kantri bilong mi; dispela prodak i bin stap insait long nesenel "Spark Program."