Amabaati aga high-alumina kika kya kintu ekiziyiza omuliro ekikoleddwa nga kikubwa ebbumba eriziyiza oba ebintu ebirala ebisookerwako ebiziyiza omuliro ku bbugumu erya waggulu; zibeera mu kika ky’ebintu ebikolebwa mu aluminosilicate. Amabaati agaziyiza omuliro ge bintu ebitali bya kyuma ebitali bya kiramu ebisangibwa mu bika eby’enjawulo, omuli amatoffaali agayitibwa high-alumina, ebbumba, magnesia, corundum, mullite, ne silicon carbide. Olw’eby’obugagga byabwe eby’okuziyiza okuzimba eby’oku ntikko, amatoffaali aga high-alumina gakozesebwa nnyo mu bika by’amabaati ag’enjawulo agaziyiza. Okusinziira ku mutindo gw’ebintu ebiziyiza alumina omungi-alumina, ebirimu Al2O3 gwe musingi omukulu ogw’okugabanya. Okusingira ddala, amatoffaali ga alumina amangi-gagabanyizibwamu ebika bisatu: Ekibiina I (ekirimu Al2O3 > 75%), Ekika II (ekirimu Al2O3 wakati wa 60% ne 75%), ne ddaala III (ekirimu Al2O3 wakati wa 48% ne 60%).
Nga ekika ky’ekintu ekiziyiza omuliro, amatoffaali aga alumina aga waggulu-okusinga gakolebwa Al2O3. Bw’ogeraageranya n’amabaati ag’ebbumba n’amabaati aga semi-silica, amatoffaali aga waggulu-alumina galaga obuziyiza obw’amaanyi era bwe kityo gasengekebwa ng’ebintu ebiziyiza okuzimba eby’omutindo ogwa waggulu-. Al2O3 zazo nnyingi ziziwa engeri eziriraanye-obutabeera na ludda, ekisobozesa okuziyiza obulungi okukulugguka kw’ettaka okukolebwa ebiwujjo byombi ebya asidi n’ebya basic. Naye kirungi okumanya nti wadde nga zirimu SiO2, okuziyiza kwazo eri basic slag kuba wansi katono okusinga okuziyiza kwazo eri acidic slag. Okusinziira ku bungi bwa Al2O3, amabaati aga waggulu-alumina gasobola okwongera okugabanyizibwamu ebika nga 55, 65, 75, ne 80.
Amabaati aga waggulu-alumina gagabanyizibwa mu bika eby’enjawulo okusinziira ku Al2O3 (aluminum oxide) ebirimu. Mu byo, amatoffaali ga corundum-nga galimu aluminiyamu ebitundu 90% oba okusingawo-gakiikirira omutendera ogw’oku ntikko ogw’amabaati aga waggulu-alumina. Amabaati ga "Special grade" high-alumina galimu waakiri ebitundu 85% ebya aluminiyamu, ate amabaati ga Grade I galimu ebitundu ebisukka mu 75%; Amabaati ga ddaala II ne III galimu waakiri ebitundu 65% ne 55% ebya aluminiyamu. Ebika bino eby’enjawulo biwa eby’obugagga eby’enjawulo ebiziyiza okuziyiza okusobola okutuukiriza ebyetaago by’amakolero eby’enjawulo. Amabaati aga waggulu-alumina kika kya aluminosilicate refractory product ekimanyiddwa olw’ekirungo kya aluminiyamu oxide (Al2O3) ekisukka mu 48%. Ebirungo bya Al2O3 bwe bituuka ku bitundu 90% oba okusingawo, biba bibaliriddwa mu matoffaali ga corundum-ekika ky’amabaati aga waggulu-alumina agagaba omulimu ogw’enjawulo ogw’obutaziyiza. Kinajjukirwa nti omutindo gw’amabaati aga waggulu-alumina guyinza okwawukana mu nsi olw’enjawulo mu by’obugagga ebiriwo.
Okugeza, mu nsi za Bulaaya, ekitono ennyo ekya Al2O3 ku bintu ebiziyiza alumina ebingi -alumina kiteekebwa ku 42%. Naye mu China, amatoffaali aga high-alumina gatera okugabanyizibwa mu bika bisatu: Amabaati ga ddaala I galimu ebitundu ebisukka mu 75% ebya Al2O3; Amabaati ga ddaala II galimu wakati wa 60% ne 75% Al2O3; n’amabaati ga Grade III galimu wakati wa 48% ne 60% Al2O3.