Industrial silica brick is an acidic shaped refractory manufactured from high-purity quartzite containing SiO2 >= 96%, engineered kom xa tshwj xeeb cov qauv load tsis kam ntawm qhov kub siab tshaj 1600℃nrog refractoriness nyob rau hauv load (RUL T0.6) mus txog 1650℃mus rau 1680℃thiab zero creep. Tus cwj pwm los ntawm qhov muaj tseeb ceev nruj tswj hauv qab 2.34 g / cm3 thiab seem quartz nyob rau hauv 1.0%, hwm silica cib ua cov khoom siv tseem ceeb rau kev txhawb nqa tus kheej hauv cov ntab iav melting furnaces thiab hauv ob sab phlu cua sov flues hauv metallurgical by-product coke ncu.
Thaum cov cib yooj yim thiab alumina-silica refractories soften thiab deform nyob rau hauv cov qauv compression ntawm 1550 degree, high-qib silica cib khaws cov rigid mechanical geometry txog li 50℃ntawm nws qhov kawg melting point (1710℃rau 1730℃). Txawm li cas los xij, vim tias quartz minerals tau ntse, tsis yog-linear crystalline inversions ntawm 100℃thiab 300 degree, cov neeg tsim khoom siv hluav taws xob thiab cov neeg cog qoob loo yuav tsum nkag siab txog thermal expansion kinetics, theem kev hloov pauv, thiab cov khoom sib xyaw ua ke. Daim ntawv qhia kev qhia no qhia txog cov tshuaj tshwj xeeb, kev tswj xyuas qhov kub thiab txias, kev ruaj ntseg iav yas, thiab cov ntawv pov thawj zoo thaum xa khoom los ntawm Tuam Tshoj.
Dab tsi yog Kev Ua Haujlwm Siab Silica Brick?
Ntuj nyoos quartzite undergoes irreversible allotropic crystalline theem hloov thaum raug rho tawm haujlwm nyob rau hauv industrial tunnel kilns ntawm 1400℃rau 1430℃rau ntau tshaj 100 teev. Lub neej kev pab cuam ntawm lub qhov cub hauv ob sab phlu nyob ncaj qha rau ntawm qhov kev faib ua feem ntawm cov pob zeb hloov pauv theem:
Tridymite (Lub Hom Phiaj: 55% txog 65%):Qhov tseem ceeb tshaj plaws thiab tsim nyog siv lead ua theem rau iav rauv lub tog raj kheej. Tridymite muaj qhov ruaj khov monoclinic-rau-hexagonal lattice uas nthuav tawm cov thermal expansion tsawg tshaj 600 degree, muab qhov ntim siab tshaj plaws nyob rau hauv kev ua haujlwm tsis tu ncua.
Cristobalite (Lub Hom Phiaj: 25% txog 35%):Tsim nyob rau hauv nruab nrab firing theem. Cristobalite muab siab refractoriness nyob rau hauv structural load thiab muaj zog tsis kam mus acidic fluxing vapors.
Residual Quartz (Lub Hom Phiaj:<= 1.0% for glass grade, <= 1.5% for coke oven grade):Unconverted quartz hais uas nyob tom qab kiln firing. High residual quartz yog qhov txaus ntshai vim tias nws txuas ntxiv mus thiab nthuav dav hauv cov chaw tsim khoom siv hluav taws xob, tsim cov txheej txheem arch lifting, pinch spalling, lossis cib tawg.
Glassy Matrix (Lub Hom Phiaj: 5% txog 8%):Tsim los ntawm cov mineralizers xws li calcium oxide (CaO) thiab hlau oxide (Fe2O3) ntxiv thaum lub sij hawm ntub dej kom ceev quartz kua-theem hloov dua siab tshiab.
Qhov Tseeb Qhov Ntsuas Qhov Ntsuas Zoo
Raw quartzite pob zeb muaj qhov tseeb qhov ceev ntawm 2.65 g / cm3. Raws li cov hluav taws kub kub hloov cov quartz ntom ntom rau hauv tridymite (qhov tseeb qhov ceev 2.26 g / cm3) thiab cristobalite (qhov tseeb qhov ceev 2.32 g / cm3), qhov ceev tag nrho poob. Yog li ntawd, qhov tseeb qhov ceev yog qhov ntsuas thoob ntiaj teb ntawm kev ua tiav kev tua hluav taws: qhov qis dua qhov tseeb pom tseeb tias quartz tau hloov pauv mus rau theem ruaj khov.
Export batch ntawmsilica cib hauv Suav tebqhia qhov ceev ceev ntawm<= 2.33 to 2.34 g/cm3 for glass melting furnaces and <= 2.35 g/cm3 for by-product coke ovens.
Technical Specifications: Iav Crown vs. Coke Cub Qib
Industrial silica bricks yog tsim los rau hauv cov hlau metallurgical formulations tailored rau tej cua sov cua sov thiab mechanical stresses.
1. Premium iav Rauv Crown Qib
SiO2 Purity: >= 96.0% (XRF tsom xam)
Al2O3 Cov ntsiab lus: <= 0.4% (Crucial purity threshold)
Fe2O3 Cov ntsiab lus: <= 0.6%
Refractoriness nyob rau hauv Load (RUL T0.6): >= 1680℃(ASTM C16)
True Density: <= 2.33 g/cm3 (ASTM C135)
Residual Quartz: <= 1.0% (XRD Quantitative Analysis)
Bulk Density:1.88-1.95g / cm3
Pom tseeb Porosity: <= 18.0%
Cold Crushing Strength (CCS): >= 45.0 MPa
Txoj Cai Tseem Ceeb Tsawg-Alumina rau iav:Daim ntawv ceeb toom tias Al2O3 hauv iav yas silica cib raug txwv rau<= 0.4%. Alumina acts as a destructive flux in the presence of volatile alkali vapors (Na2O) inside glass tanks. Exceeding 0.5% Al2O3 lowers the eutectic liquidus temperature drastically, causing refractory dripping into the molten glass bath and producing visual ribbon defects or stone inclusions.
2. Txheem Coke Cub Roj Teeb & Kub Blast Cub Qib
SiO2 Purity: >= 95.0%
Al2O3 Cov ntsiab lus: <= 1.3%
Fe2O3 Cov ntsiab lus: <= 1.0%
Refractoriness nyob rau hauv Load (RUL T0.6): >= 1640℃rau 1650 degree
True Density: <= 2.35 g/cm3
Residual Quartz: <= 1.5% to 2.0%
Pom tseeb Porosity: <= 22.0%
Cold Crushing Strength (CCS): >= 35.0 rau 40.0 MPa
Thermal Expansion Behavior: 100℃txog 300℃Inversion Zone
Tsis zoo li alumina-silica cib uas nthuav tawm linearly nrog qhov kub thiab txias, silica cib nthuav tawm qhov ntse, uas tsis yog-linear thermal expansion profile tswj hwm los ntawm cov ntxhia inversions:
Qhov Dangerous Low-Temperature Inversion Zone (100℃txog 300 degree):
Nyob nruab nrab ntawm 117℃thiab 163 degree, alpha-tridymite sai sai inverts rau hauv beta-tridymite nrog ib tug ntse volumetric expansion ntawm kwv yees li 0.2%.
Nyob nruab nrab ntawm 200℃thiab 270 degree, alpha-cristobalite hloov mus rau hauv beta-cristobalite, ua rau muaj qhov loj heev, nrawm nrawm ntawm ze li 1.0%.
Tshaj li 70% ntawm lub neej thermal expansion ntawm silica cib tshwm sim ua ntej hauv ob sab phlu mus txog 300 degree.
Qhov Chaw Ua Haujlwm Zoo (Tshaj 600 degree):
Thaum lub cub tawg kub tshaj 600 degree, qhov nthuav dav nkhaus theem tawm tag nrho.
Ntawm 600℃thiab 1600 degree, thermal expansion yog negligible (tsawg dua 0.1%). Qhov no ua rau silica cib yog ib qho ntawm cov khoom siv nruj tshaj plaws nyob rau hauv high-temperature engineering.
Kiln Heat-Up Schedule Txoj Cai
Txhawm rau tiv thaiv kev puas tsuaj thermal kev ntxhov siab tawg thaum lub sijhawm pib cua sov:
Ambient rau 150 degree:Cov cua kub yuav tsum tsis pub tshaj 5℃ib teev.
150℃rau 350 degree:Cov cua kub ceev nruj rau 2℃txog 3℃ib teev twg, nrog rau 24-teev soaking tuav ntawm 160℃thiab 260 degree.
Tie-Rod Tension Management:Raws li lub tshuab hluav taws xob kub nce thaum lub sijhawm cua sov, cov kws ua haujlwm yuav tsum ua kom lub caij nplooj ntoos hlav khi-qhib rau sab nraud steel buckstays kom haum rau kev nthuav dav yam tsis muaj kev sib tsoo cib.
Primary Industrial Applications
1. Float Glass Rauv Crowns
Niaj hnub nimno ntab iav kab ua haujlwm tsis tu ncua rau 12 txog 15 xyoo yam tsis muaj kev kho kub. Spanning dav ntawm 10 mus rau 14 meters ncaj qha saum molten soda-lime iav ntawm 1580℃txog 1620 degree, silica crowns tiv thaiv vaporized sodium alkali nres. Volatile alkali reacts nrog silica los tsim ib lub siab-viscosity kua sodium silicate nto glaze uas adheres rau lub cib tsis dripping. Nyob rau hauv sib piv, yooj yim refractories nyiamMagnesia refractory khoomnkag mus rau hauv tus kheej qhov hnyav ntawm cov kub no. Sab nrauv yas rwb thaiv tsev feem ntau ua ke sib sib zog nqus silica cib thiab thaub qabcalcium silicate boardtxhawm rau ua kom qhov kub thiab txias ntawm qhov kub siab tshaj 1200 degree, tiv thaiv cov roj acid condensation.
2. By-Product Coke cub roj teeb phab ntsa
Nyob rau hauv metallurgical coke ncu, silica bricks tsim lub ntsug cua sov flues thiab carbonization chamber faib phab ntsa. Cov cib tiv taus cov neeg kho tshuab kev puas tsuaj thaum lub sij hawm thee charging thiab liab-kub coke thawb. Nrog thermal conductivity ncav cuag 1.8 txog 2.2 W / (m·K) saum toj no 800 degree, tridymite-nplua nuj phab ntsa hloov tshav kub zoo, accelerating carbonization cycles. Tsis tas li ntawd, nrog Fe2O3 tswj nyob rau hauv 1.0%, silica bricks tseem chemically inert tiv thaiv carbon monoxide (CO) gas, tshem tawm hlau-catalyzed carbon deposition uas ua rau sab hauv disintegration nyob rau hauv fireclay refractories.
Masonry Installation, Silica Mortar Pairing & Joint Sizing
Strict Silica Mortar Matching: Silica bricks must never be laid with high-alumina or fireclay bonding mortars. Always pair them with specialized refractory silica mortar containing SiO2 >= 94% thiab Al2O3<= 1.5%. Clay-based mortars form low-melting eutectic compounds that liquefy and bleed out of joints above 1500°C.
Tight Joint Tolerances:Iav rauv crowns mandate pob qij txha<= 1.5 mm. Every brick is dry-checked for dimensional tolerances before applying a thin wet slurry.
Expansion Joint Allowances:Ib qho kev nthuav dav ntev ntawm 12 mus rau 14 hli ib kab 'meter' yuav tsum tau ua rau hauv lub tshuab hluav taws xob. Cov khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob.
Thaum tsim hluav taws xob hloov pauv ntawm silica crowns thiab sidewall seem tsim los ntawmkub refractory bricks, saj zawg zog expansion pob qij txha tiv thaiv compressive shear tsis ua hauj lwm.
Factory Direct Inspection, Sourcing & Export Logistics
Kev yuav khoom ncaj qha los ntawm cov tuam txhab muaj ntawv pov thawj hauv Suav teb yuav tsum muaj kev txheeb xyuas nruj ntawm kev hloov pauv tiav thiab kev tiv thaiv ntim khoom:
Factory Inspection Protocols:Txhua 50 metric tons ntawm kev tsim khoom tau dhau los kuaj pycnometer qhov tseeb qhov ceev ntawm ASTM C135. Batch ntau tshaj 2.34 g / cm3 raug tso tseg. Quantitative X-ray diffraction (XRD) paub meej tias cov quartz seem nyob hauv qab 1.0%.
Moisture-Protected Export Ntim:Vim tias silica cib tuaj yeem hydrate lossis nqus cov dej noo uas ua rau cov thermal poob siab thaum lub sij hawm kub ceev, pallets raug kaw hauv ob txheej txheej polyethylene shrink zaj duab xis, tiv thaiv los ntawm cov yas kaum ruaj ruaj, strapped nrog hnyav PET banding, thiab ruaj ntseg ntawm fumigated khoom ntoo pallets ua raws li ISPM 15 qauv.
Cov ntsiab lus lag luam & Lub Sijhawm Lead:Standard 230x114x65 mm straights yuav tsum muaj tsawg kawg nkaus txiav txim kom muaj nuj nqis (MOQ) ntawm 10 metric tons. Kev cai tapered arch wedges, skewbacks, thiab tus nplaig-thiab-groove coke cub duab muaj 20-tuj MOQ. Standard xaj xa tuaj nyob rau hauv 10 mus rau 14 hnub, nrog kev cai pwm pressings shipping nyob rau hauv 20 mus rau 25 hnub FOB Qingdao.
Rau cov ntaub ntawv xeem ntawv pov thawj (MTC), XRD mineralogical cov ntaub ntawv, los yog kev lag luam nug ntawm iav yas thiab coke cub silica duab, hu rau peb cov kev pab neeg ntawminquiry@topower.tech.
