Isithando sokuncibilikisa ingilazi siyithuluzi lokushisa lokuncibilikisa ingilazi elenziwe ngezinto eziphikisayo. Ukusebenza kahle kwesevisi kanye nokuphila kwesithando sokuncibilikisa ingilazi kuncike kakhulu ezinhlobonhlobo kanye nekhwalithi yezinto eziphikisayo. Ukuthuthukiswa kobuchwepheshe bokukhiqiza ingilazi kuncike kakhulu ekuthuthukisweni kobuchwepheshe bokukhiqiza izinto eziphikisayo. Ngakho-ke, ukukhethwa okufanele kanye nokusetshenziswa kwezinto eziphikisayo kuyinto ebaluleke kakhulu ekwakhiweni kwezithando zokuncibilikisa ingilazi. Ukuze wenze lokhu, amaphuzu amabili alandelayo kumele aqondwe kahle, elinye izici nezingxenye ezifanele zezinto eziphikisayo ezikhethiwe, kanti elinye izimo zesevisi kanye nendlela yokugqwala kwengxenye ngayinye yesithando sokuncibilikisa ingilazi.
Izitini ze-corundum ezihlanganisiweZiyi-alumina encibilikisiwe esithandweni se-arc kagesi bese ziphonswa kumodeli ethile yesimo esithile, zifakwe emanzini abandayo bese zigcinwa ngokushisa, bese zicutshungulwa ukuze kutholakale umkhiqizo owufunayo. Inqubo yokukhiqiza ejwayelekile ukusebenzisa i-alumina ene-calcined ehlanzekile kakhulu (ngaphezu kuka-95%) kanye nenani elincane lezithasiselo, zifake izithako esithandweni se-arc kagesi, bese zifakwa ezikhunjini ezenziwe ngaphambilini ngemva kokuncibilikiswa ekushiseni okuphezulu okungaphezu kuka-2300 ° C, bese zigcinwa zifudumele. Ngemva kokuncibilikisa, kuyakhishwa, bese i-blank ekhishwe iba umkhiqizo oqediwe ohlangabezana nezidingo ngemuva kokusebenza okubandayo okunembile, ukuhlanganiswa kwangaphambili nokuhlolwa.
Izitini ze-corundum ezihlanganisiwe zihlukaniswe ngezinhlobo ezintathu ngokwezinhlobo ezahlukene zekristalu kanye nobuningi be-alumina: eyokuqala yi-α-Al2O3 njengesigaba esiyinhloko sekristalu, esibizwa ngokuthi izitini ze-α-corundum; eyesibili yi-α-Al2 Izigaba zekristalu ze-O3 kanye ne-β-Al2O3 zinokuqukethwe okufanayo, okubizwa ngokuthi izitini ze-αβ corundum; uhlobo lwesithathu ikakhulukazi yizigaba zekristalu ze-β-Al2O3, ezibizwa ngokuthi izitini ze-β corundum. Izitini ze-corundum ezihlanganisiwe ezivame ukusetshenziswa ezitsheni zokuncibilikisa ingilazi ezintantayo ziyizinhlobo zesibili nezesithathu, okungukuthi izitini ze-αβ corundum ezihlanganisiwe kanye nezitini ze-β corundum. Lesi sihloko sizogxila ezimpahleni zomzimba nezamakhemikhali zezitini ze-αβ corundum ezihlanganisiwe kanye nezitini ze-β corundum kanye nokusetshenziswa kwazo ezitsheni zokuncibilikisa ingilazi ezintantayo.
1. Ukuhlaziywa kokusebenza kwezitini ze-corundum ezihlanganisiwe
1. 1 Isitini se-αβ corundum esihlanganisiwe
Izitini ze-αβ corundum ezihlanganisiwe zakhiwe cishe yi-50% α-Al2 O3 kanye ne-β-Al2 O3, futhi amakristalu amabili ahlanganiswe ndawonye ukuze akhe isakhiwo esiminyene kakhulu, esinokumelana okuhle kakhulu nokugqwala kwe-alkali. Ukumelana nokugqwala ekushiseni okuphezulu (ngaphezu kuka-1350°C) kubi kancane kunokwezitini ze-AZS ezihlanganisiwe, kodwa emazingeni okushisa angaphansi kuka-1350°C, ukumelana kwayo nokugqwala engilazini ehlanganisiwe kufana nokwezitini ze-AZS ezihlanganisiwe. Ngenxa yokuthi ayinayo i-Fe2 O3, i-TiO2 kanye nokunye ukungcola, isigaba sengilazi ye-matrix sincane kakhulu, futhi izinto zangaphandle ezifana nama-bubbles cishe azibonakali lapho zithinta ingilazi ehlanganisiwe, ukuze ingilazi ye-matrix ingangcoliswa.
Izitini ze-αβ corundum ezihlanganisiwe ziminyene kakhulu ekubunjweni futhi zinokumelana okuhle kakhulu nokugqwala engilazini encibilikisiwe ngaphansi kuka-1350°C, ngakho-ke zisetshenziswa kabanzi echibini lokusebenza nangale kwezitofu zokuncibilikisa ingilazi, ngokuvamile ezindaweni zokugeza, izitini zezindebe, izitini zesango, njll. Izitini ze-corundum ezihlanganisiwe emhlabeni zenziwa kangcono yiToshiba yaseJapan.
1.2 Isitini se-β corundum esihlanganisiwe
Izitini ze-β-corundum ezihlanganisiwe zakhiwe cishe yi-100% β-Al2 O3, futhi zinesakhiwo esikhulu sekristalu esifana nepuleti β-Al2 O3. Zinkulu futhi azinamandla kangako. Kodwa ngakolunye uhlangothi, zinokuphikiswa okuhle kokuqhekeka, ikakhulukazi zibonisa ukumelana okukhulu kakhulu nokugqwala kumhwamuko we-alkali onamandla, ngakho-ke zisetshenziswa esakhiweni esingaphezulu sesithando sokuncibilikisa ingilazi. Kodwa-ke, uma zishiswa emoyeni onokuqukethwe okuphansi kwe-alkali, zizosabela nge-SiO2, kanti i-β-Al2O3 izobola kalula futhi ibangele ukuncipha kwevolumu okubangela imifantu nemifantu, ngakho-ke isetshenziswa ezindaweni ezikude nokuhlakazeka kwezinto zokusetshenziswa zengilazi.
1.3 Izakhiwo zomzimba nezamakhemikhali zezitini ze-αβ ne-β corundum ezihlanganisiwe
Ukwakheka kwamakhemikhali kwezitini ze-α-β ne-β corundum ezihlanganisiwe ikakhulukazi yi-Al2O3, umehluko ukhona kakhulu ekwakhiweni kwesigaba sekristalu, futhi umehluko ekwakhiweni kwe-microstructure uholela ekwehlukeni kwezakhiwo zomzimba nezamakhemikhali njengobuningi obukhulu, i-coefficient yokwanda kokushisa, kanye namandla okucindezela.
2. Ukusetshenziswa kwezitini ze-corundum ezihlanganisiwe ezitsheni zokuncibilikisa ingilazi
Kokubili phansi kanye nodonga lwechibi kuthintana ngqo noketshezi lwengilazi. Kuzo zonke izingxenye ezithintana ngqo noketshezi lwengilazi, isici esibaluleke kakhulu sezinto eziphikisayo ukumelana nokugqwala, okungukuthi, akukho ukusabela kwamakhemikhali okwenzekayo phakathi kwezinto eziphikisayo kanye noketshezi lwengilazi.
Eminyakeni yamuva nje, lapho kuhlolwa izinkomba zekhwalithi zezinto ezixubile eziphikisana ngqo nengilazi encibilikisiwe, ngaphezu kokwakheka kwamakhemikhali, izinkomba zomzimba nezamakhemikhali, kanye nokwakheka kwamaminerali, izinkomba ezintathu ezilandelayo kumele zihlolwe futhi: inkomba yokumelana nokuguguleka kwengilazi, inkomba yebhamuza elikhawulelwe kanye nenkomba yekristalu ekhawulelwe.
Njengoba izidingo ziphezulu zekhwalithi yengilazi kanye nomthamo omkhulu wokukhiqiza wesithando somlilo, ukusetshenziswa kwezitini zikagesi ezihlanganisiwe kuzoba banzi. Izitini ezihlanganisiwe ezivame ukusetshenziswa ezitsheni zokuncibilikisa ingilazi ziyizitini ezihlanganisiwe ze-AZS series (Al 2 O 3 -ZrO 2 -SiO 2). Lapho izinga lokushisa lezitini ze-AZS lingaphezu kuka-1350℃, ukumelana nokugqwala kwalo kuphindwe izikhathi ezingu-2 ~ 5 kunezitini ze-α β -Al 2 O 3. Izitini ze-αβ corundum ezihlanganisiwe zakhiwe yizinhlayiya ezincane ze-α-alumina (53%) kanye ne-β-alumina (45%), eziqukethe inani elincane lesigaba sengilazi (cishe u-2%), zigcwalisa ama-pores phakathi kwamakristalu, ngobumsulwa obukhulu, futhi zingasetshenziswa njengezingxenye zokupholisa izitini zodonga lwechibi kanye nezingxenye zokupholisa phansi. Izitini nezitini zomthungo njll.
Ukwakheka kwamaminerali kwezitini ze-αβ corundum ezihlanganisiwe kuqukethe inani elincane lesigaba sengilazi, elingeke liphume futhi lingcolise uketshezi lwengilazi ngesikhathi sokusetshenziswa, futhi linokumelana okuhle nokugqwala kanye nokumelana okuhle kakhulu nokushisa okuphezulu ngaphansi kuka-1350 ° C. Liyingxenye yokupholisa yesithando sokuncibilikisa ingilazi. Liyinto efanelekile yokungaguquki ezindongeni zethangi, phansi kwethangi kanye nokuwasha izithando zokuncibilikisa ingilazi ezintantayo. Kuphrojekthi yobunjiniyela besithando sokuncibilikisa ingilazi entantayo, isitini se-αβ corundum esihlanganisiwe sisetshenziswa njengesitini sodonga lwesichibi sengxenye yokupholisa yesithando sokuncibilikisa ingilazi. Ngaphezu kwalokho, izitini ze-αβ corundum ezihlanganisiwe nazo zisetshenziselwa izitini zendlela kanye nezitini ezihlanganisiwe zesembozo esigabeni sokupholisa.
Isitini se-β corundum esihlanganisiwe siwumkhiqizo omhlophe owakhiwe ngamakristalu amakhulu e-β-Al2 O3, aqukethe u-92% ~ 95% Al2O3, isigaba sengilazi esingaphansi kuka-1% kuphela, futhi amandla aso esakhiwo abuthakathaka ngenxa ye-lattice yekristalu ekhululekile. Iphansi, i-porosity ebonakalayo ingaphansi kuka-15%. Njengoba i-Al2O3 ngokwayo igcwele i-sodium ngaphezu kuka-2000°C, izinzile kakhulu ngokumelene nomhwamuko we-alkali emazingeni okushisa aphezulu, futhi ukuzinza kwayo kokushisa nakho kuhle kakhulu. Kodwa-ke, uma ixhumana ne-SiO2, i-Na2O equkethwe ku-β-Al2O3 iyabola futhi isabela ne-SiO2, kanti i-β-Al2O3 iguqulwa kalula ibe yi-α-Al2O3, okuholela ekuncipheni okukhulu kwevolumu, okubangela imifantu nomonakalo. Ngakho-ke, ifaneleka kuphela ezakhiweni ezikude nothuli olundizayo lwe-SiO2, njengesakhiwo sechibi lokusebenza lesithando sokuncibilikisa ingilazi, i-spout engemuva kwendawo yokuncibilikisa kanye ne-parapet yayo eseduze, ukulinganisa isithando esincane nezinye izingxenye.
Ngenxa yokuthi ayisebenzi nama-alkali metal oxides aguquguqukayo, ngeke kube khona izinto ezincibilikisiwe eziphuma ebusweni bezitini ukuze zingcolise ingilazi. Esithandweni esincibilikisa ingilazi esintantayo, ngenxa yokuncipha okungazelelwe kokungena komsele wokugeleza kwengxenye yokupholisa, kulula ukubangela ukuminyana komphunga we-alkaline lapha, ngakho-ke umsele wokugeleza lapha wenziwe ngezitini ze-β ezihlanganisiwe ezingamelani nokugqwala ngumusi we-alkaline.
3. Isiphetho
Ngokusekelwe ezimpahleni ezinhle kakhulu zezitini ze-corundum ezihlanganisiwe maqondana nokumelana nokuguguleka kwengilazi, ukumelana ne-foam, kanye nokumelana namatshe, ikakhulukazi isakhiwo sayo esiyingqayizivele sekristalu, ayingcolisi neze ingilazi encibilikisiwe. Kunezinhlelo zokusebenza ezibalulekile ebhandeni lokucacisa, esigabeni sokupholisa, esigijimayo, esithandweni esincane nakwezinye izingxenye.
Isikhathi sokuthunyelwe: Julayi-05-2024