Maɗaukakin bulogin alumina nau'in nau'in abu ne na refractory da farko wanda ya ƙunshi aluminum 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%), Darasi na II (60-75%), da na III (48-60%).
Waɗannan samfuran aluminosilicate ne masu haɓakawa tare da abun ciki na aluminum oxide (Al₂O₃) wanda ya wuce 48%.
Su nau'in abu ne na tsaka tsaki tare da abun ciki na alumina sama da 48%, wanda aka ƙera ta hanyar siffatawa da ƙididdige bauxite ko wasu albarkatun ƙasa masu wadatar alumina. Suna nuna babban kwanciyar hankali na thermal da refractoriness wuce digiri 1770. Tare da juriya mai kyau, ana amfani da su don layi na murhun ƙarfe na lantarki, murhun narkewar gilashi, da rotary kilns na siminti.
Babban - lodi -mai laushi, ƙarami{2}}mai rarrafe- bulogin alumina [1] kayan aikin ƙira ne na musamman daga bauxite na musamman-, gauraye corundum, da fused mullite. Waɗannan tubalin suna ba da fa'idodi kamar ƙarancin zafi mai ƙarfi{7}}, juriya mai ƙarfi, da kyakkyawan kwanciyar hankali na zafi.
Dace da manya da matsakaita{0}masu girman murhu masu zafi, suna wakiltar mataki mai nasara wajen samar da ingantattun kayan cikin gida na manyan{1}}masu inganci, manyan{2}kayan da aka shigo da su a baya don sabbin murhun wuta na ƙasata-; an haɗa wannan samfurin a cikin "Shirin Spark na ƙasa."