1. Kev cuam tshuam ntawm kev kho cua sov kub ntawm lub koom haum ntawm corundum-based refractory cov ntaub ntawv
Raws li cov cua kub kub nce, calcium aluminate binder tivthaiv nyob rau hauv lubrefractory corundum cov ntaub ntawvyuav hloov. Tshwj xeeb, calcium aluminate (CaAl2O4, hu ua CA) yuav maj mam hloov mus rau CaAl4O7 (hu ua CA2). Cov txheej txheem kev hloov pauv no muaj qhov cuam tshuam loj rau microstructure ntawm cov khoom siv refractory:
1. Sintering ntawm nplua ceramic hais: Raws li qhov kub thiab txias, cov khoom zoo ceramic nyob rau hauv cov ntaub ntawv refractory yuav maj mam sinter ua ke los tsim ib tug ruaj khov network qauv uas yog interconnected. Kev tsim cov qauv no pab txhim kho tag nrho lub zog thiab ruaj khov ntawm cov khoom siv refractory.
2. Txheej ntawm cov khoom loj-particle aggregates: Thaum lub sij hawm kev hloov pauv, cov calcium aluminate binder yuav maj mam ntub thiab kis rau ntawm cov loj-particle aggregates thiab txuas nrog ib leeg, thiab thaum kawg tsim ib txheej ntawm cov khoom loj. Cov nyhuv txheej no pab txo qhov sib txawv ntawm qhov loj-particle aggregates thiab txhim kho qhov ntom thiab yaig tsis kam ntawm cov ntaub ntawv refractory.
2. Cov txiaj ntsig ntawm kev kho cua sov ntawm cov khoom siv los ntawm cov khoom siv corundum-based refractories
Kev kho cua sov kub tsis tsuas yog cuam tshuam rau lub koom haum cov qauv ntawm corundum-raws li cov ntaub ntawv refractory, tab sis kuj muaj kev cuam tshuam loj rau lawv cov particle shedding kev ua tau zoo:
1. Txhim kho cov particle adhesion: Raws li cov cua kub kub nce, cov adhesion ntawm refractory hais yuav maj mam nce. Qhov no feem ntau yog vim kev hloov pauv ntawm calcium aluminate binder thiab sintering ntawm cov khoom zoo ceramic, uas ua rau lub zog sib txuas ntawm cov khoom siv refractory nruj dua.
2. Txo cov particle shedding: Nyob rau hauv cov xwm txheej ntawm 60 feeb ntawm rwb thaiv tsev, thaum tshav kub kub yog 1150-1130, particle shedding yog ho txo. Ntawm lawv, 1250-1350 degree yog suav tias yog qhov zoo tshaj plaws preheating seem. Nyob rau hauv qhov ntsuas kub no, lub microstructure ntawm cov khoom siv refractory yog optimized, thiab lub zog sib txuas ntawm cov khoom yog kho kom zoo, yog li txo qhov kev poob ntawm cov khoom.
3. Qhov cuam tshuam ntawm kev kho cua sov ntawm lwm yam khoom ntawm corundum-based refractory cov ntaub ntawv
Txawm hais tias qhov kev kho cua sov kub muaj cov txiaj ntsig me me ntawm cov poroses pom kev, cov kev poob siab thiab tag nrho cov cua sov kev ua haujlwm nyob rau hauv lub thermal poob siab yog txhim kho nrog kev nce ntawm kub. Qhov no ntxiv ua pov thawj qhov txiaj ntsig zoo ntawm kev kho cua sov ntawm qhov kev ua haujlwm ntawm particle shedding.
Hauv cov ntsiab lus, kev kho cua sov kub muaj qhov cuam tshuam loj rau lub koom haum thiab kev ua haujlwm ntawm corundum-based refractories. Los ntawm kev tswj xyuas qhov ntsuas kub kom zoo, lub microstructure ntawm refractory tuaj yeem ua kom zoo dua qub thiab kev sib txuas ntawm cov khoom tuaj yeem txhim kho, yog li txo qis cov khoom tawg thiab txhim kho tag nrho cov kev ua tau zoo ntawm cov refractory.
