High-alumina bricks ngu ai gaw, n-gun ja ai ga nhpu (sh) kaga n-gun ja ai arung arai ni hpe nbung katsi ai shara hta wan nat nna galaw shapraw ai hkrang n-gun ja ai arung arai amyu langai mi re; shanhte gaw aluminosilicate ngu ai arai amyu hta lawm ai. N-gun n rawng ai lung seng ni gaw, n-gun n rawng ai lung seng ni rai nna, amyu myu hku nna nga ai, dai hta, n-gun ja ai alumina, ga nhpu, magnesia, corundum, mullite, hte silicon carbide lung seng ni lawm ai. Shanhte a grau kaja ai n-gun n-gun a majaw, high-alumina brick ni hpe n-gun n-gun n-rawng ai lung seng amyu myu hta grai lang ma ai. Hpa majaw nga yang, -alumina n-gun n rawng ai arung arai ni a matu masat masa ni hte maren, Al2O3 rawng ai lam gaw madung garan ginhka ai masat masa rai nga ai. Grau nna, high-alumina lung seng ni hpe tsang masum hku garan nna, tsang I (Al2O3 rawng ai > 75%), tsang II (Al2O3 rawng ai 60% hte 75% lapran), hte tsang III (48% hte 60% lapran Al2O3 rawng ai) ngu nna garan ginhka da ai.
N-gun n rawng ai arung arai langai hku nna, high-alumina lung seng ni gaw madung hku nna Al2O3 hte hpawng de da ai. Ga nhpu nlung hte semi-silica nlung ni hte shingdaw yu yang, high-alumina nlung ni gaw grau nna n-gun ja ai n-gun hpe madun dan ai majaw, n-gun ja ai -grade n-gun ja ai arung arai ni hku nna masat da hkrum ai. Shanhte a Al2O3 law ai majaw, shanhte hpe -neutral arawn alai ni hpe jaw ya ai majaw, acidic hte basic slags lahkawng yan a majaw, n-gun n rawng ai hpe atsawm sha ninghkap lu ai. Raitim, SiO2 lawm tim, shanhte a basic slag hpe ninghkap lu ai atsam gaw acidic slag hpe ninghkap lu ai atsam hta loi mi yawm ai hpe sadi ra ai. Al2O3 n-gun hpe madung tawn nna, alumina lung seng ni hpe 55, 65, 75, 80 zawn re ai grade ni hku nna bai garan mai ai.
Alumina lung seng ni hta Al2O3 (aluminum oxide) rawng ai hpe madung tawn nna, nlung amyu myu hku garan ginhka da ai. Dai ni hta, aluminium 90% (sh) dai hta jan ai corundum lung seng-ni-ni gaw, alumina lung seng ni hta grau tsaw ai tier hpe madi madun ai. "Special grade" tsaw ai-alumina lung seng ni hta n yawm htum 85% aluminum lawm nna, Grade I lung seng ni hta 75% jan lawm ai; Grade II hte Grade III nlung ni hta n yawm htum 65% hte 55% aluminum lawm ai. Ndai n bung ai grade ni gaw, n bung ai hpaga lam hta ra kadawn ai lam ni hpe hkap la lu na matu, n bung ai refractory atsam ni hpe jaw ya ai. Alumina lung seng ni gaw 48% jan aluminum oxide (Al2O3) lawm ai aluminosilicate n-gun n rawng ai arung arai langai mi rai nga ai. Al2O3 90% (sh) dai hta jan ai shaloi, shanhte hpe corundum brick-alumina brick amyu myu hku nna garan ginhka da ai rai nna, dai gaw laklai ai n-gun n-gun hpe jaw ya lu ai. Hpa majaw nga yang, lu ai arung arai ni n bung ai majaw, high-alumina lung seng ni a matu madang ni gaw mungdan shagu hta n bung chye ai hpe sadi ra ai.
Ga shadawn, Europe mungdan ni hta, -alumina n-gun n rawng ai arung arai ni a matu, n law htum Al2O3 hpe 42% hku masat da ai. Raitim, Miwa mung hta, high-alumina lung seng ni hpe, laksan hku nna, tsang masum hku garan nna, tsang I lung seng ni hta 75% jan Al2O3 lawm ai; Grade II lung seng ni hta 60% hte 75% lapran Al2O3 lawm ai; hte Grade III lung seng ni hta 48% hte 60% lapran Al2O3 lawm ai.