Silica Mullite CibPuas yog cov ntaub ntawv txhuas-silicon ua los ntawm sintering silicon carbide, mullite lossis alumina clinker ntawm qhov kub. Lub ntsiab siv lead ua theem ntawm cov khoom no yog corundum, mullite thiab silicon carbide, thiab muaj me me ntawm Cristobalite. Vim nws cov kev coj zoo ua tsis kam, muaj zog dua, nws tuaj yeem siv dav hauv ntau qhov Maas Teb KILS tshwj tsis yog thaj chaw hlawv.
Nrog kev txhim kho ntawm cov yaum cov khoom siv tau ntau lawm thiab cov kev hloov roj siv, kev siv ib puag ncig ntawm cov khoom siv txi lus cilish tau dhau los ua hnyav. Qee qhov hluav taws kub siab ntawm cov pob zeb dog dig ntawm cov pob zeb dog dig, tshwj xeeb tshaj yog thermal poob ruaj khov, tsis tuaj yeem ua tau raws li kev yuav tsum tau ua. Yog li ntawd, cov kev tshawb fawb ua tau zoo tau ua rau silicon-molybdenum cib. Siv High-alumina Alumina Clinker ua aggregate, fused brown corundum, silicon carbide thiab -al2o3 hmoov ntxiv rau matrix. Los ntawm kev tsim nyog me ntsis qhab nia, siab siab moulding thiab siab-sintering, silica molybdenum cib ua nrog kev ua haujlwm zoo dua yog npaj. Thaum qhov kev sib ntxiv ntawm -al2O yog 6%, kev ua tau zoo ntawm 2.16amp / thermal dej txias ntawm ntau dua 32mpa, thiab thermal conductivity ntawm 1.75w / (mentk).
High Alumina Clinker thiab Sic hmoov hmoov zoo yog siv los ua cov khoom siv raw loj, thiab peb qhov ntau thiab tsawg ntawm Andalusite (3 ~ 1 hli, 1 ~ {mm,<0.074mm) are added respectively. The sintering is carried out at 1480℃×3h, and the effect of the addition amount and particle size of andalusite on the performance of silica-mullite bricks is studied. The experiment shows that the andalusite added to silica-mullite bricks will form a staggered and compact mullite structure when mullitized at high temperature, which can resist the expansion of internal cracks of the product when the temperature changes sharply, thereby improving the thermal shock stability of the material. After the andalusite mullite is transformed, the compact mullite is formed, which is not only conducive to the improvement of the thermal shock stability of the material, but also can increase the load softening temperature of the silica mullite firebrick. As the amount of andalusite added increases, the load softening temperature of the silica mullite brick gradually increases.
Thaum tus nqi ntawm cov zircon xuab-zeb ntxiv nce, qhov ntim ntom ntom thiab compressive lub zog ntawm cov qauv ob leeg qhia cov qauv ntawm nce ua ntej thiab tom qab ntawd txo qis. Ib qho ntxiv, lub thermal poob ncua ntawm cov qauv yog txhim kho. Thaum tus nqi ntawm cov zircon xuab-zeb ntxiv yog 10% ~ 15%, kev ua haujlwm ntawm cov qauv yog qhov zoo dua qub. Tom qab ib qho kev tsim nyog ntawm zircon xuab zeb tau ntxiv rau cov qauv, cov tshuaj tiv thaiv ntawm tus Sintering hauv cov sillica mullite cib. Ntawm qhov tod tes, zirconium oxide generated los ntawm nws yuav nqus lub zog ntawm cov kev ntxhov siab tawg, thiab ua si lub zog hluav taws xob tsis txaus ntseeg, thiab ua si lub zog hluav taws xob tawm, yog li kev txhim kho cov thermal poob khov ntawm cov khoom. Txawm li cas los xij, yog tias ntau zircon xuab zeb tau ntxiv, mullite yuav tsim, ua rau ntim nthuav, uas yuav ua rau kom txo qis hauv lub zog.
Nrog mullite, alumina homogenous cov khoom siv, silicon carbide thiab cov qauv hluav taws xob tau tsim los txhim kho cov khoom noj raw tsis zoo, thiab cov khoom siv hluav taws xob tsis tshua muaj zog ntau cov mullite cib. Qhov kev sim ua kom pom tias muaj 70 mullite ua aggregate, 80 homogenous cov khoom siv ua haujlwm silicon thiab 10 ~ 12% thiab zoo thermal tsis kam. Thaum silica mullite cib ua hauj lwm txheej yog ib qho kev sib xyaw ua ke ntawm 45 qib kev sib xyaw ua ke thiab zoo li thermal thiab zoo thermal txuam ntawm cible txheej.
Cov khoom no yog siv nyob rau hauv thaj chaw hloov ntawm Caas Teb Kiln thiab tau ua tiav cov txiaj ntsig zoo. Piv nrog tsoos silicon carbide cib cib, nws tuaj yeem ua lub luag haujlwm txhawb kev lag luam hluav taws xob thiab kev ua kom pom kev sib tsoo. Cov txiaj ntsig qhia tau tias thaum cov nyiaj ntawm cov zaub mov uas silicon ntxiv yog 15% ~ 20%, ntau yam khoom ntawm silicon carbide cib yog qhov zoo. Nce cov nyiaj uas tau nplua ntau ntxiv yog ua kom muaj zog los txhim kho lub zog compressive ntawm cov qauv thiab txo cov porosity pom tseeb. Nce qhov me me ntawm cov hmoov zoo yog tau txais txiaj ntsig kom txhim kho cov thermal poob siab tsis kam ntawm silicon carbide. Thaum silicon carbide yog ntxiv rau hauv ib qho kev sib xyaw ntawm ob 10 yam ntawm hmoov nplua, lub txiaj ntsim silicon carbide cib muaj kev ua tau zoo tshaj plaws.
