Kev taw qhia ntawm fused zirconium corundum rau hauv cov ntaub ntawv refractory feem ntau suav nrog txoj kev qhia ncaj qha thiab kev qhia tsis ncaj ntawm txoj kev ua ntej-synthesizing ZrO2-muaj clinker. Txij li thaum ZrO2 muaj ib qho kev hloov pauv siv lead ua thiab nrog lub ntim hloov pauv, thaum tsim cov khoom siv refractory nrog ZrO2, thaum cov nyiaj ZrO2 ntxiv yog nyob rau hauv ib qho me me, txoj kev sib ntxiv ncaj qha tuaj yeem siv, thiab cov khoom siv yaj thiab cam khwb cia. tsis txwv los ntawm qhov chaw no. Cov txheej txheem ua ntej-synthesizing ZrO2- muaj cov khoom siv hluavtaws siv tau rau tag nrho ntau yam. ZrO2 composite raw cov ntaub ntawv tuaj yeem ua ntej-synthesized siv cov txheej txheem sintering lossis cov txheej txheem electrofusion.
Fused zirconium corundum yog ib qho tseem ceeb ntawm refractory raw cov ntaub ntawv uas muaj zirconia. Nws yog tsim los ntawm kev ntxiv zirconia (los yog ZrO2 desiliconized zirconium) thiab zircon xuab zeb rau industrial alumina los yog bauxite thiab melting nws nyob rau hauv ib tug hluav taws xob arc rauv. Lub ntsiab siv lead ua theem yog -Al2O3, theem nrab siv lead ua yog baddeleyite, thiab muaj me me ntawm iav theem. Cov tsos mob feem ntau yog greyish xim av. Raws li cov ntsiab lus ntawm ZrO2, fused zirconium corundum tuaj yeem muab faib ua qis fused zirconium corundum (ZrO2 txog 10% ~ 15%), nruab nrab fused zirconium corundum (ZrO2 txog 25%) thiab siab fused zirconium corundum (ZrO2 txog 40%).
Kev siv cov fused zirconium corundum hauv cov ntaub ntawv refractory
High-alumina bauxite tuaj yeem tshem tawm cov impurities feem ntau los ntawm cov txheej txheem electrofusion (subtraction), thiab ntxiv qhov tsim nyog ntawm cov txiaj ntsig oxides (xws li zirconia) tuaj yeem txhim kho nws cov kev ua tau zoo (ntxiv rau). Cov khoom zoo ZrO2 mullite series hloov cov ntaub ntawv uas tsim nyob rau hauv txoj kev no yog tsis tshua muaj nqi thiab pheej yig, thiab kev ua tau zoo ntawm no series ntawm alumina-raws li fused hluavtaws cov ntaub ntawv npaj nrog siab alumina thiab zircon xuab zeb raws li raw cov ntaub ntawv yog tib yam li ntawm cov tib series. series ntawm alumina-raws li cov khoom siv hluavtaws.
Raws li qhov kev thov rau cov hlau zoo hauv kuv lub teb chaws nce, molten steel tseem muab cov kev xav tau tshiab ntawm cov khoom zoo thiab ntau. Txhawm rau hloov mus rau qhov teeb meem no, cov roj inert yog siv los ua kom cov hlau molten los txhim kho cov khoom tsim tau thiab kev huv ntawm cov hlau molten. Raws li cov cuab yeej tseem ceeb rau kev ua kom zoo dua qub ntawm cov hlau molten, cov xwm txheej rau kev siv cov ladles lined nrog cov ntaub ntawv refractory tau dhau los ua qhov xav tau. Tam sim no, aluminium-magnesium castables feem ntau yog siv los ua cov ntaub ntawv refractory rau ladles hauv tsev thiab txawv teb chaws. Txawm li cas los xij, rau lub ladle tshuab qhov chaw uas yuav tsum tau thermal shock stability, thermal shock stability ntawm tus kheej-bonded aluminium-magnesium castables tuaj yeem txhim kho los ntawm kev ntxiv zirconium corundum.
Nyob rau hauv loj thiab nruab nrab ladles, high-purity Al2O3-MgO castables thiab Al2O3- spinel castables yog dav siv, tab sis Al2O3-MgO castables yog nquag mus tawg, thiab slag nkag mus rau hauv cov castables raws cov kab nrib pleb, accelerating yaig thiab txo Nthuav cov kev pab cuam lub neej ntawm lub hauv ob sab phlu. Txawm hais tias cov khoom sib xyaw oxide tsim los ntawm ZrO2 thiab Al2O3 muaj qhov zoo ntawm kev tiv thaiv corrosion, zoo thermal poob siab thiab lub zog siab, tus nqi siab ntawm cov ntshiab ZrO2 txwv nws txoj kev nce qib thiab daim ntawv thov. Siv cov alumina-raws li tsim tshiab fused zirconium corundum ua hmoov zoo, alumina-based ZrO2 tuaj yeem txhawb cov sintering ntawm Al2O3-MgO castables, yog li txhim kho qhov kub thiab txias lub cev ntawm cov castables; kev taw qhia ntawm alumina-raws li fused zirconium corundum Nws muaj me ntsis cuam tshuam rau thermal shock kuj ntawm Al2O3-MgO castables.
