Ihlose umthelela wezingxenye ezahlukene ze izitini eziphezulu ze-alumina refractory ekusebenzeni

Ngokukhula kokuqukethwe kwe-Al2O3 ezitini eziphakeme ze-alumina refractory, inani lezingxenye ze-mullite ne-corundum liyanda, futhi isigaba seglasi siyancipha ngokuhambisanayo, futhi ukumelana nomlilo kanye nokushuba kwezitini eziphikisayo ze-alumina eziphakeme nazo ziyanda. Lapho okuqukethwe kwe-Al2O3 esitini se-alumina esiphezulu kungaphansi kuka-71.8%, okuwukuphela kwesigaba sekristalu esizinzile esinezinga eliphezulu lokushisa esitini esiphikisayo se-alumina esiphezulu siyi-mullite, futhi siyanda ngokukhula kokuqukethwe kwe-Al2O3. Ngoba izitini eziphakeme ze-alumina ezikhanyayo ngokuqukethwe kwe-Al2O3 okungaphezu kuka-71.8%, izigaba ze-crystal ezinzile ezisezingeni eliphezulu ziyi-mullite ne-corundum. Njengoba okuqukethwe kwe-71.8% kukhuphuka, inani le-corundum liyakhula futhi i-mullite iyancipha, futhi izakhiwo zokushisa eziphezulu izitini eziphakeme ze-alumina ezikhanyayo zithuthukiswa ngokufanele.

Izinga lokushisa lokudubula lezitini eziphakeme ze-alumina refractory lincike ekutheni i-sinterability yezinto zokusetshenziswa kwe-alumina. Uma usebenzisa i-bauxite clinker yebanga elikhethekile futhi I-grade grade (inqwaba yokuminyana ≥ 2.80g/cm3), impahla eluhlaza inesakhiwo esifanayo kanye nokuqukethwe okungcolile okuphezulu, okwenza umzimba oluhlaza ube lula ukucwilisa, kodwa izinga lokushisa le-sintering lincane, okuyinto kulula ukubangela ukushisa ngokweqile noma Ukushiswa Kancane. Uma usebenzisa i-bauxite clinker ye-Class II (inqwaba yokuminyana ≥2.55g/cm3), ngenxa yokunwetshwa nomphumela wokuxegisa obangelwa i-mulliteization yesibili, umzimba oluhlaza akulula ukuwucwilisa, ngakho-ke izinga lokushisa lokudubula liphakeme kancane. Uma usebenzisa i-bauxite clinker ye-Class III (inqwaba yokuminyana ≥2.45g/cm3), isakhiwo siminyene, okuqukethwe kwe-Al2O3 kuphansi, futhi izinga lokushisa lokudubula liphansi, ngokuvamile liphakeme kancane kunezinga lokushisa lokudubula lezitini zobumba ngo-30~50. ℃. Izitini eziphezulu ze-alumina refractory zishiswa ilangabi le-oxidizing.