Inqubo yokudubula yezitini zobumba ezikhiqizwa isitini esiyinjwayelo abakhiqizi

Ukomisa izinga lokushisa eliphakathi nendawo: 150 ~ 200C (isitini esijwayelekile nesitini esijwayelekile)

120~160℃(isitini esimise okukhethekile)

Izinga lokushisa lokukhipha: 70 ~ 80 ℃

Umswakama osele wesitini ungaphansi kuka-2%

Isikhathi sokumisa: 16 ~ 24 amahora

Ukudubula kwezitini zobumba kungahlukaniswa ngezigaba ezine

1. Izinga lokushisa elijwayelekile libe ngu-200 degrees Celsius: Ngalesi sikhathi, izinga lokushisa akufanele lisheshe kakhulu ukuvimbela umzimba ukuthi ungaqhekeki. Lapho udubula kuhhavini lomhubhe, izinga lokushisa lezindawo zokupaka ezi-4 zokuqala akufanele lidlule i-200 ℃.

2, 200~900C: Kulesi sigaba, izinga lokushisa kufanele lenyuswe ukuze kube lula ukusabela kwamakhemikhali ezinto eziphilayo kanye nokungcola kokuluhlaza.

Ngaphakathi kwezinga lokushisa elingu-600℃900℃, kufanele kugcinwe umoya onamandla we-oxidizing eziko ukuze kuvinjwe ukwenzeka kwemfucuza “emnyama”.

3, 900 ℃ kuya ekushiseni okuphezulu kakhulu: Esigabeni sokushisa okuphezulu, izinga lokushisa kufanele likhuphuke kancane, futhi liqhubeke nokugcina umoya we-oxidizing, ukuze umzimba onesici ushiselwe ngokulinganayo, futhi ngesikhathi esifanayo, kungavimbela isitini ekuqhekekeni. Ngenxa yokuthi i-sintering shrinkage inamandla kakhulu ngaphezu kwe-1100c, izinga lokuncipha liphezulu njenge-5%, ngakho-ke kubaluleke kakhulu ukugcina ukuphumula kwe-gradient yokushisa nokuqeda ukucindezeleka kwangaphakathi.

Izinga lokushisa lokumelana nomlilo lezitini zobumba ngokuvamile liphakeme ngo-100-150C ngaphezu kwezinga lokushisa le-sintering. Uma izinga lokushisa le-sintering lobumba olufakwe emanzini lincane, izinga lokushisa le-refractory kufanele libe phansi, okungcono libe ngu-50-100C. Ukushisa kwe-sintering yezitini zobumba kufanele kuqinisekise ukuthi ubumba oluhlangene luthambile ngokugcwele, futhi ungqimba olungaphezulu lwe-powder ecolekile kanye nezinhlayiya eziqinile ze-clinker zisabela ngokugcwele, ukuze izinhlayiya ze-clinker ziboshwe, ukuze umkhiqizo uthole okulungile. amandla kanye nokuzinza kwevolumu. Izinga lokushisa le-sintering ngokuvamile liyi-1250 ~ 1350c. Uma okuqukethwe kwe-al2o3 kuphezulu, izinga lokushisa elishisayo lomkhiqizo kufanele lenyuswe ngokufanelekile, cishe ngo-1350～1380c, futhi isikhathi sokushisa ngokuvamile singu-2-10h ukuze kuqinisekiswe ukusabela okwanele kumkhiqizo kanye nekhwalithi yomkhiqizo engaguquki.

4 Isigaba sokupholisa: Ngokuvumelana nokushintshwa kwe-lattice yesitini sobumba esigabeni sokupholisa, izinga lokupholisa kufanele lehliswe ngokushesha lapho izinga lokushisa lingaphezu kuka-800~1000℃, futhi izinga lokupholisa kufanele lehliswe libe ngaphansi kuka-800℃. Eqinisweni, ekukhiqizeni kwangempela, izinga lokupholisa langempela elisetshenzisiwe ngeke libangele ingozi yokuqhekeka okubandayo komkhiqizo.