Hluav taws xob fused refractory cov ntaub ntawv yog tsim los ntawm melting ib tug precisely npaj sib tov nyob rau hauv ib tug hluav taws xob arc rauv thiab ces pouring nws mus rau hauv ib tug xuab zeb pwm. Lub ingot yog tom qab kub kho thiab tom qab ntawd ua tiav mechanically. Cov txheej txheem smelting tuaj yeem ua tiav cov pob zeb ntxhib thiab cov qauv ntom ntom. Piv nrog sintered refractory cov ntaub ntawv, nws muaj cov yam ntxwv ntawm cov qauv tuab, muaj zog dua thiab muaj zog tiv taus iav ua kua yaig. Cov hom tseem ceeb tam sim no tsim muaj xws li: fused mullite refractory cib,fused zirconium corundum cib, fused chromium zirconium corundum cib, fused quartz cib, fused corundum cib, thiab lwm yam.
1. Fused mullite cib
Fused mullite cib siv high-alumina bauxite li raw khoom, thiab sib txawv bauxites yog formulated rau hauv cov muaj pes tsawg leeg ntawm mullite (3Al2O3·2SiO2, cov pawg loj yog: Al2O3 72%, SiO2 28%). Nws yog yaj ntawm li 2300 degree, ncuav rau hauv cov xuab zeb pwm ntawm 1850 degree, thiab ces annealed kom tshem tawm kev ntxhov siab. Lub ntsiab siv lead ua theem yog mullite thiab corundum, thiab cov iav theem yog ntim ntawm cov theem siv lead ua. Nws qhov kev tiv thaiv rau iav kua yaig yog muaj zog dua li ntawm sintered refractory cov ntaub ntawv, tab sis tsis zoo li lwm yam fused refractory ntaub ntawv. Ntxiv me me (7% ~ 8.5%) ntawm zirconium dioxide tuaj yeem ua rau cov pob zeb me me me thiab cov cib qauv denser. Tus nqi ntawm mullite nce mus rau 60% ~ 70%, uas kuj txo cov ntsiab lus ntawm cov iav theem thiab txo cov Cracks hauv cov khoom. Fused mullite cib tau hloov pauv los ntawm fused zirconium cib.
2. Fused zirconium corundum cib
Fused zirconium corundum refractory bricks yog hu ua AZS cib. Raws li cov ntsiab lus ntawm ZrO2, nws muab faib ua peb theem. Cov qib sib thooj yog: AZS-33 (muaj 33% ZrO2), AZS ~ 36 (muaj 36% ZrO2), thiab AZS-41 (muaj 41% ZrO2).
Raws li cov cua sib txawv thaum lub sij hawm melting, muaj ob hom: txo melting txoj kev thiab oxidation melting txoj kev. Tam sim no, txoj kev oxidation feem ntau yog siv. Txoj kev oxidative melting tuaj yeem tshem tawm cov pa phem los ntawm graphite electrodes hauv cov kua molten. Nws muaj cov ntsiab lus carbon tsawg ({{0}}.005% ~ 0.02%), tuaj yeem txo cov npuas hauv cov iav, thiab txhim kho cov kua iav kom zoo.
3. Fused corundum cib
Fused corundum bricks yog ua los ntawm high-purity alumina ua raw khoom, qhia nrog ib tug me me ntawm soda tshauv, thiab melted ntawm 2000 ~ 2200 degree. Cov txheej txheem ntau lawm zoo ib yam li cov khoom siv high-aluminium. Muaj fused -corundum cib, fused, -corundum refractory cib, fused -corundum cib, thiab lwm yam. Fused -corundum cib yog tsim rau melting borosilicate iav, opal iav thiab sulfate-muaj melts. Cov muaj pes tsawg leeg ntawm fused, -corundum cib tsuas yog muaj me me ntawm cov iav theem, uas yuav tsis xau tawm thaum siv, thiab yuav ua rau cov iav kua tsawg dua. Kev sib cuag ncaj qha nrog cov kua iav yuav tsis xim lub iav kua, thiab muaj kev tiv thaiv corrosion zoo. Nws yog qhov kev xaiv zoo tshaj plaws rau iav melting. Cov khoom siv zoo tshaj plaws rau cov phab ntsa ntawm lub qhov cub txias, qhov cub hauv qab, thiab ntxhua khaub ncaws ntawm ntab iav melting rauv. Fused corundum bricks yog haum rau lub sab sauv qauv ntawm lub cub tawg ua hauj lwm pas dej ua ke thiab lub combustion chaw nres nkoj nyob rau tom qab ntawm lub melting cheeb tsam thiab nws nyob ze ntawm lub mis phab ntsa, me me cub tawg flats thiab lwm yam.
4. Fused chromium zirconium corundum cib
Qhia 10% mus rau 30% Cr2O3 rau hauv AZS-33 cib thiab siv txoj kev uas tsis yog shrinkage kab noj hniav los tsim fused chromium zirconium corundum refractory cib. Cov tawv nqaij thiab sab hauv ntawm lub cib yog xim ntsuab tsaus. Lub cib muaj 4.5% shrinkage kab noj hniav thiab tsis muaj kev sib txuas pores. Vim yog qhov tsim ntawm aluminium chromium spinel cov tshuaj tov, lub viscosity ntawm lub iav theem yog nce, thiab kev tiv thaiv rau iav kua erosion yog zoo heev. Nws yog 3.4 npaug ntawm fused AZS-33 cib thiab 2.6 npaug ntawm fused AZS-41 cib.
5. Fused quartz cib
Kev tsim cov txheej txheem ntawm fused quartz refractory cib yog tib yam li cov iav quartz. Siv high-purity quartz xuab zeb (SiO2 cov ntsiab lus saum toj no 99.5%) raws li raw khoom, ntxiv ib tug me me ntawm Na20 raws li mineralizing neeg sawv cev, thiab yaj nyob rau hauv ib tug graphite kuj rauv (1750 ~ 1800 degree). Tom qab melting, tag nrho cov khoom molten yog sai sai tshem tawm, dov mus rau hauv cib, thiab ces mechanically tiav tom qab txias nyob rau hauv cov huab cua. Lub thermal expansion coefficient yog me me thiab thermal shock kuj zoo. Boron iav kua kuj yog heev corrosive, tab sis nws tsis resistant rau dej qab zib-lime-silica iav kua.
6. Zircon cib
Cov khoom tseem ceeb ntawm zircon pob zeb yog ZrO2 · SiO2. Zircon decomposes rau hauv ZrO2 thiab SiO2 thaum rhuab ntawm 1680 degree. Zircon cov khoom ua kua iav muaj qhov zoo tiv thaiv corrosion, thiab aluminium zirconium silicon series (AZS) fused cam khwb cia refractory cib thiab raug rho tawm haujlwm cib muaj kev tiv thaiv zoo rau iav kua yaig thiab tuaj yeem siv rau phab ntsa tank thiab sab sauv ntawm iav melting rauv. Zircon bricks muaj cov khoom zoo xws li kub tsis kam, zoo thermal poob siab tsis kam thiab tsis kam rau iav kua yaig.
