bulukeeti sare oo aluminium ah (Darajada III) (T-3)

Haddii nuxurka Al2O3 uu ka sarreeyo 90%, waxaa loo yaqaan leben corundum. Sababo la xiriira kheyraadka kala duwan, halbeegyada wadamo kala duwani ma aha kuwo si buuxda isku waafaqaya. Tusaale ahaan, wadamada yurubiyanku waxay qeexayaan in xadka hoose ee Al2O3 ee loogu talagalay refractories-alumina-sare waa 42%. Dalka Shiinaha, lebenka aluminiumka ah ee sarreeya badanaa waxay tixraacaan lebennada refractory ee leh Al2O3 oo ka badan 48%. Waxay inta badan ka samaysan yihiin bauxite-dabiici ah oo heer sare ah, oo ka kooban macdan sida diaspore, bomerite, kaolinite, iwm. waa la sameeyay, la qalajiyey, oo ugu dambeyntii la eryay. Refractoriness ee leben aluminium sare waa qiyaastii 1770 ℃, iyo heerkulka jilcin waa 1420 ℃-1550 ℃. Lebenka sare ee caadiga ah waa LZ-80, LZ-75, LZ-65, LZ-55, LZ-48, iwm foornada, foornada reverberatory iyo foornada wareegta ah. Intaa waxaa dheer, lebenka aluminiumka sare ayaa sidoo kale si ballaaran loo isticmaalaa sida lebennada jeegaga kaydinta kulaylka-wadnaha, furayaasha nidaamka shubidda, lebenka biibiile, iwm.