Ubuhle nokubi kwe-fused white steel jade kanye ne-fused brown corundum:

I-corundum-based refractory impahla eluhlaza eyenziwe indlela ehlanganisiwe ye-corundum inokuqukethwe okuphezulu kwe-alumina. Izinhlamvu ze-corundum ziphelele futhi zimahhadla. Ukuzinza kwamakhemikhali aphezulu, i-alumina yezinga eliphezulu noma i-high-alumina clinker isetshenziswa njengempahla eluhlaza ukuze incibilike ku-arc Shanghai, isuse impahla eyinsalela, futhi ipholise i-frit. Kunezinhlobo ezimbili eziyinhloko ze-corundum ensundu ehlanganisiwe ne-corundum emhlophe ehlanganisiwe. Uma i-alumina bauxite ephezulu isetshenziselwa ukukhiqiza i-corundum ensundu, i-alumina bauxite ephezulu idinga ukushiswa ngaphambili ngaphambi kwe-electrofusion ukuze kukhishwe amanzi akhangisiwe kanye namanzi esakhiwo kuwo ukuze kusheshiswe inqubo ye-electrofusion nokunciphisa ukusetshenziswa kwamandla. Ukuze unciphise ngokugcwele inqubo yokuhlanganisa futhi ususe ngokuphumelelayo ukungcola, kuyadingeka ukwengeza inani elifanele le-anthracite ne-iron powder ezintweni zokusetshenziswa. Lapho i-alumina ikhiqiza i-corundum emhlophe, ngenxa yokuhlanzeka okuphezulu kwezinto zokusetshenziswa, asikho isidingo sokusebenzisa izindlela zokunciphisa ukuhlukanisa ukungcola. Okuqukethwe kwe-alumina ye-alumina ensundu ehlanganisiwe kukhulu kuno-90%, kanti okuqukethwe kwe-alumina ye-alumina emhlophe ehlanganisiwe kungaphezu kwama-98%. Ukusebenza kwe-corundum ehlanganisiwe empeleni kuyafana nalokho kwe-alumina e-sintered, kodwa enye i-corundum ehlanganisiwe ine-porosity ebonakalayo ephakeme.