Refractory swb rooj vag feem ntau muaj xws li hom Alumina-carbon hom, alumina-carbon-zirconia hom, magnesia-carbon hom, alumina-magnesia spinel-carbon hom, zirconia hom thiab lwm yam.
1.Alumina-carbon swb rooj vag phaj
Siv tabular alumina thiab hluavtaws mullite ua cov ntaub ntawv tseem ceeb, cov khoom siv roj carbon thiab cov tshuaj tua kab mob (xws li hlau aluminium, hlau silicon, SiC, B, C, Mg-B, thiab lwm yam) ntxiv rau hauv matrix ib feem, thiab coal tar pitch los yog phenolic Resin yog ntxiv los ua tus neeg sawv cev khi. Cov khoom sib xyaw yog kneaded thiab tom qab ntawd tsim nyob rau hauv siab siab; raug rho tawm haujlwm nyob rau hauv qhov chaw txo qis los tsim cov carbon-bonded refractory. Lub phaj zawv zawg ntawm cov khoom siv no muaj kev tiv thaiv corrosion zoo vim nws cov qauv compact, nplua pores, thiab muaj qee cov nyiaj seem ntawm cov pa roj carbon monoxide, yog li nws muaj kev tiv thaiv corrosion zoo rau molten steel thiab slag. Meanwhile vim nws cov qauv compact, thermal crushing kuj yog qis dua, nws tsis tuaj yeem siv tsis tu ncua rau ntau zaus. Secondly, nyob rau hauv tus txheej txheem ntawm kev siv, vim hais tias cov carbon yog yooj yim oxidized, cov qauv yog xoob thiab corrosion kuj yog txo.
2.Alumina-carbon-zirconia swb rooj vag phaj
Aluminium carbon zirconium zawv zawg phaj yog tsim los ntawm kev siv hluav taws xob aluminium carbon sliding phaj. Hom zawv zawg no txais yuav A12O3-SiO2-ZrO2 series raw cov ntaub ntawv nrog tsawg nthuav tus nqi, thiab yog tsim rau hauv ib tug refractory khoom nrog baddeleyite, mullite, corundum, thiab lwm yam raws li lub ntsiab siv lead ua theem thiab characterized los ntawm carbon bonding. Ua ntej, zirconium mullite yog qhia raws li aggregate, thiab zirconium oxide nyob rau hauv zirconium mullite undergoes crystal transformation ntawm txog 1000 degree, nrog rau cov yam ntxwv ntawm ntim shrinkage, thiab microcracks yog generated nyob rau hauv cov nplej, uas zoo heev txhim kho lub thermal crushing tsis kam ntawm cov khoom. Qhov thib ob, ZrO2 muaj kev tiv thaiv corrosion zoo heev, thiab nws cov kev tiv thaiv corrosion yog qhov siab dua li ntawm aluminium carbon zawv zawg daim hlau.
3.Magnesium carbon swb daim hlau
Raws li lub hauv paus ntawm periclase zawv zawg phaj: tus tsim Mg0-C zawv zawg phaj kov yeej qhov tsis zoo ntawm qhov tsis zoo thermal shock tsis kam ntawm periclase zawv zawg phaj. Nyob rau hauv cov xwm txheej ntawm kev kub siab casting, lub sij hawm ntev casting thiab siab cov ntsiab lus ntawm oxygen & calcium nyob rau hauv molten steel, magnesium-carbon zawv zawg phaj kuj tau txais txiaj ntsig zoo.
4.Spinel carbonaceous zawv zawg phaj
Spinel carbonaceous zawv zawg phaj yog ua los ntawm magnesia-aluminium spinel raw khoom, ua rau magnesia-aluminium spinel ua lub ntsiab siv lead ua theem. Lub thermal expansion coefficient thiab elastic modulus ntawm magnesia-aluminium spinel cov khoom yog me dua li cov magnesia, thiab thermal shock kuj muaj zog dua li ntawm magnesia.Meanwhile, cov tshuaj tiv thaiv qeeb tshwm sim ntawm cov khoom siv spinel thiab cov calcium hauv cov hlau molten. , uas ua rau muaj kev tsim cov ntsiab lus tsawg-melting, uas cuam tshuam rau nws lub neej kev pab cuam. Los ntawm kev txhim kho cov khoom siv raw hauv cov txheej txheem tsim khoom, thiab kev txhim kho & tswj rau qhov loj me me faib thiab tua hluav taws kub ntawm ntsuab compact, erosion kuj ntawm magnesium spinel swb phaj tau zoo heev, thiab cov kev pab cuam lub neej kuj tau zoo heev. nce.
5.Zirconia zawv zawg rooj vag phaj
Cov khoom siv zirconia muaj kev tiv thaiv zoo corrosion thiab spalling kuj. Lub magnesia ib nrab stabilized zirconia swb phaj yuav siv tau nyob rau hauv hnyav casting tej yam kev mob nrog ib tug lifespan txog li 10 zaug. Kub nias zirconia zawv zawg phaj muaj cov yam ntxwv ntawm lub zog thermal, tsis tshua muaj porosity thiab me pore loj. Thaum siv rau ntawm tundish, nws muaj ntau dua corrosion kuj rau molten steel thiab slag.
