Ngokuvamile, izitini eziphezulu ze-aluminium akufanele zisetshenziswe esithandweni somlilo se-alkaline. Ngenxa yokuthi i-alkaline ne-acidic medium nayo ine-chlorine, izongena ezingqimbeni ezijulile zezitini ze-alumina eziphakeme ngendlela ye-gradient, okuzokwenza ukuthi isitini esiphikisayo siwele.
Isitini esiphezulu se-aluminium ngemva kokuguguleka komkhathi we-alkaline imifantu evundlile. Ukuguguleka kwakhiwe nge-fuel grey, amagesi avuthayo, kanye nezingxenye ze-alkaline kweminye imikhiqizo. Lezi zingxenye zisabela ngesigaba sengilazi kanye netshe le-mullite esitini esiphezulu se-aluminium.
Izitini eziphezulu ze-aluminium ezine-alkaline egqwalile zizovela phezulu. Izinhlanganisela zegesi ezivuthayo zizophinde zikhiqize i-nitrate yokulutha, i-sedimentation esikhaleni sezitini eziphakeme ze-aluminium; ukusabela kwezinguzunga zeqhwa ezikhiqiziwe kuzokwakha isigaba esisha esiyinkimbinkimbi. Uma ama-nitrile enhlanhla engenamanzi ethintana ne-vagram ekhiqiziwe, ukusabela kwe-anti -vaporization kuzokwenzeka, okubangele ukuthi isitini esiphezulu se-aluminium siqhekeke noma siwe. Ngaphezu kwalokho, ukugqwala okushisayo nakho kubi kakhulu ekugqwaleni kwezitini eziphikisayo. Ngenxa yokuguguleka kwe-Fang quartz, i-Skywine, ne-quartz crystal silica. Ukusetshenziswa kwamathayili omlilo kuzoba kubi kakhulu kunama-noodle abandayo.
Ukulimala kwezitini ze-silicon dioxide nakho kubi kakhulu. I-silica incibilika esigabeni esiphezulu se-aluminium -i-liquid. I-nitrate yenhlanhla encibilikayo kanye namatshe e-silicon ancibilika kancane akha inani elikhulu lesigaba soketshezi. Ukuphakama kokuqukethwe kwe-silica esitini, inani elikhulu lesigaba soketshezi. Izigaba zoketshezi ezeqile zizokhubaza izitini eziphakeme ze-aluminium. I-silicon silicon nayo ilimele ezitini. Ngenxa yokuthi i-silica yamahhala iyasetshenziswa, isigaba se-Mo Lai Shi sizoguguleka. Ngemuva kokuphendula kwe-lickle nitrate kanye netshe le-mullite kungabangela ukwanda okulimazayo kwesitini esiphezulu se-aluminium.
Izitini eziphakeme ze-aluminium zinokumelana okuhle kakhulu nokushisa okuphezulu nokuhuzuka. Asetshenziswa kakhulu olayini bezindawo zokushisa ezihlukene zezimboni, njengeziko eliqhumayo, iziko lomoya oshisayo, nama-rotary kilns. Kodwa-ke, emkhathini we-alkaline esithandweni somlilo sezimboni, ukusetshenziswa kwezitini eziphakeme ze-alumina kunqunyelwe.
Izakhiwo zamakhemikhali zezitini eziphezulu ze-alumina zibenza bamelane nemiphumela yezindawo ezine-acidic. Kodwa-ke, endaweni ene-alkaline kakhulu, njengeziko likasimende noma iziko lengilazi, izitini eziphakeme ze-aluminium zizosabela nge-alkali metal oxides, okwenza izitini ziqhekeke futhi zihlakazeke. Ukusabela phakathi kwezitini ze-Al2O3 nama-alkali metal oxides ngokuvamile kubangela ukwakheka kwejeli ye-alkali aluminosilicate, enephuzu eliphansi lokuncibilika futhi elingageleza kalula emifantwini.
Ukuze kuxazululwe le nkinga, kusetshenziswe amasu amaningana ukuze kuthuthukiswe ukumelana kwezitini eziphakeme ze-aluminium ezindaweni ezine-alkaline. Isixazululo esisodwa ukufaka i-magnesia noma i-spinel ezitini eziphakeme ze-alumina. I-magnesia noma i-spinel izosabela nge-alkali metal oxides ukwakha izigaba ezizinzile ze-spinel, ezingathuthukisa ukumelana kwezitini ze-Al2O3 ekuqhekekeni okubangelwa ukusabela kwe-alkali. Esinye isixazululo ukufaka i-coating yokuzivikela ebusweni bezitini eziphakeme ze-alumina ukuvimbela ukuthintana okuqondile nemvelo ye-alkali.
Kafushane, izitini eziphakeme ze-aluminium zinokusebenza okulinganiselwe emkhathini we-alkaline wesithando somlilo sezimboni. Ukuze uthuthukise ukumelana kwezitini ze-Al2O3 ezindaweni ezine-alkaline, kuyadingeka ukwengeza amaminerali athile noma izimbotshana ukuze ugweme ukusabela okuyingozi ngama-alkali metal oxides. Kubalulekile ukukhetha izinto ezifanele zolayini lwesithando somlilo wemboni ukunciphisa izingozi ezingaba khona futhi wonge izindleko.
Isikhathi sokuthumela: May-19-2023
