Qhov kev nthuav dav coefficient loj dua, corundum cib lossis mullite cib?
Qhov kub-kub expansion ntawmrefractory brickshais txog qhov ua tau zoo ntawm qhov kub thiab txias ntawm cov cib, thiab kev nthuav dav coefficient yog hais txog qhov sib txawv ntawm qhov sib txawv ntawm cov cib refractory thaum kub nce.Corundum cibthiabmullite cibyog ob qho tib si high-end cov ntaub ntawv nyob rau hauv lub tshav pob ntawm refractory cov ntaub ntawv thiab kuj belongs rau alumina series. Nyob rau hauv kev sib piv, corundum firebricks muaj ib tug me me expansion coefficient tshaj mullite firebricks. Corundum refractory bricks muaj cov ntsiab lus melting siab, ruaj khov kub ua haujlwm thiab zoo hnav tsis kam.
1. Mullite zoo ib yam li siab alumina refractory cib
Mullite bricks zoo ib yam li siab alumina refractory cib. Muaj ob hom ntawm mullite, ib qho yog mullite tsim los ntawm clinker nrog cov ntsiab lus txhuas ntawm qhov kub thiab txias, thiab lwm yam yog mullite refractory cib ua los ntawm mullite uas yog zoo li tus thiab raug rho tawm ntawm kub. Tshwj xeeb, refractory bricks nrog ntxiv mullite muaj qhov kub thiab txias siab tshaj 1700 degree, tuaj yeem tsim cov yeeb yaj kiab tiv thaiv ntawm qhov kub thiab txias, thiab muaj kev hloov tau zoo.
2. Cov thermal expansion coefficients txawv
Refractory bricks yuav nthuav nyob rau hauv ntim tom qab cua sov, tab sis cov thermal expansion coefficients kuj txawv nyob ntawm seb muaj pes tsawg leeg ntawm cov minerals sib txawv. Lub thermal expansion ntawm av nplaum cib, siab alumina cib, magnesia cib, thiab lwm yam yog loj, tab sis expansion coefficient ntawm silica bricks yog loj dua vim polycrystalline transformation.
Qhov loj dua thermal expansion coefficient, qhov tsawg tswj tau qhov loj ntawm refractory bricks, thiab thermal stability kuj yuav cuam tshuam. Qhov ntau dua qhov thermal expansion coefficient, qhov ntau dua qhov kev ntxhov siab sab hauv tsim los ntawm cov cib refractory tom qab cua sov, thiab lawv tau yooj yim puas thaum kub hloov sai.
3. Lub expansion coefficient yog ib qho ntawm cov cim tseem ceeb ntawm refractory cib
Qhov me me qhov nthuav coefficient, qhov me me qhov hloov pauv tshwm sim los ntawm crystallization, crystal transformation thiab nruam sintering ntawm refractory bricks nyob rau hauv qhov kev txiav txim siab kub. Lub expansion coefficient yog ib qho tseem ceeb ntsuas ntawm refractory bricks. Qhov ntim ntawm refractory bricks yuav hloov vim qhov kub thiab txias thaum siv. Nws yuav cuam tshuam rau lub compactness ntawm qhov loj ntawm refractory bricks. Nyob rau hauv ib txwm muaj xwm txheej, thaum tso refractory bricks, expansion pob qij txha yuav tsum tau sab laug raws li cov cib ntawm cov khoom sib txawv. Yog hais tias qhov expansion coefficient loj dhau thiab tsis ua haujlwm raws sijhawm, lub tshuab ua kom sov lub cev yuav tawg vim qhov cib nthuav dav, cuam tshuam rau kev siv.
Muaj ntau hom refractory bricks nrog sib txawv expansion coefficients. Sib piv corundum cib thiab mullite cib, qhov nthuav dav ntawm corundum firebricks yog me dua li ntawm mullite hluav taws cib.
