Ib qho alumina silica cib yog qhov ntom ntom ntom ntom uas muaj feem ntau ntawm txhuas oxide (Al2O3) thiab silicon dioxide (SiO2) hauv qhov sib txawv, tsim los tiv thaiv kev khiav hauj lwm kub ntawm 1300℃mus rau 1790℃nyob rau hauv hnyav mechanical compression, thermal cycling, thiab tshuaj slag corrosion. Spanning lub spectrum los ntawm tus qauv fireclay cib (30% mus rau 45% Al2O3) rau premium high-alumina qib (48% mus tshaj 80% Al2O3), alumina-silica refractories sawv cev tshaj 60% ntawm tag nrho cov zoo li hauv ob sab phlu installation thoob ntiaj teb hla blast furnaces, kub blast qhov cub, cement kiln.
Txawm hais tias ob qho tib si fireclay thiab high-alumina refractories belongs rau Al2O3-SiO2 binary system, lawv cov mineralogical theem compositions txawv heev. Raws li cov ntsiab lus alumina nce, qis-melting glassy silica theem yog hloov los ntawm kev ruaj khov crystalline mullite (3Al2O3·2SiO2) thiab corundum (alpha-Al2O3), tsav tsheb refractoriness nyob rau hauv load (RUL T0.6) los ntawm 1350℃mus txog 1550 degree. Txawm li cas los xij, xaiv qhov tsis ncaj ncees lawm qib feem ntau ua rau cov txheej txheem ntxov ntxov ntxov lossis tsis tsim nyog cov nqi yuav khoom. Daim ntawv qhia kev qhia no qhia txog kev faib cov tshuaj lom neeg, ASTM tus qauv qib, ntsuas ntsuas kev ua haujlwm ntawm thermomechanical, thiab cov qauv kev tsim khoom ntawm lub Hoobkas thaum yuav khoom ncaj qha los ntawm Tuam Tshoj.
Kev faib tawm ntawm Alumina Silica Refractories
Kev lag luam alumina-silica refractories yog categorized los ntawm lawv cov alumina pawg feem pua, uas dictates cov ntxhia pob zeb muaju tsim nyob rau hauv high-temperature tunnel kiln firing:
1. Fireclay Bricks (Al2O3 30% rau 45%)
Ua los ntawm refractory flint av nplaum thiab calcined grog bonded nrog yas kaolinite.
Mineral Phase:Corundum thiab mullite crystals embedded nyob rau hauv ib tug siliceous glassy matrix.
Kev Ua Haujlwm Limit:Kev pabcuam txuas ntxiv mus txog 1300℃txog 1350 degree.
Qhov tseem ceeb Advantage:Tshwj xeeb tshaj yog thermal poob siab tsis kam thiab tus nqi nruab nrab, ua rau lawv tus qauv xaiv rau cov boiler rauv taws, kiln backing khaubncaws sab nraud povtseg, thiab kub-kub flues.
2. Semi-Silica Bricks (Al2O3 15% rau 30%, SiO2 > 65%)
Engineered rau daim ntawv thov uas yuav tsum tau ntim expansion stability. Vim tias qhov seem quartz nthuav dav me ntsis thaum pib cua sov, nws tiv thaiv lub ntuj shrinkage ntawm av nplaum ntxhia, ua rau cov pob qij txha nruj nrog zero tom qab cua sov shrinkage txog 1250 degree.
3. High-Alumina Bricks (Al2O3 48% rau 85%+)
Ua los ntawm premium calcined bauxite, sillimanite-pab pawg minerals, los yog fused alumina aggregates.
Mineral Phase:Interlocking koob zoo li mullite muaju thiab hexagonal tabular corundum.
Kev Ua Haujlwm Limit:Kev pabcuam txuas ntxiv los ntawm 1450℃txog 1750 degree.
Qhov tseem ceeb Advantage:Tsis tshua muaj neeg kho tshuab load-cov kabmob muaj peev xwm ntawm qhov kub thiab txias, siab bulk ntom, thiab superior tsis kam rau acidic thiab nruab nrab metallurgical slags.
Kev yuav khoom ncaj qha los ntawm kev lees paubAlumino silicate bricks manufacturersmuab cov qauv tsim tshwj xeeb raws li qhov tshwj xeeb thermal thiab mechanical stresses.
Technical Specifications: Qib-los-qib piv
Refractory engineers cia siab rau cov qauv qib los qhia qhov kev ua tau zoo ntawm cov khoom siv dag zog, porosity, thiab kub-kub ntim stability:
1. Standard Fireclay Qib (SK-32 & SK-34)
Al2O3 Cov ntsiab lus:36% mus rau 42%
Refractoriness:1710℃txog 1750℃(Pyrometric Cone sib npaug SK-32 / SK-34)
Refractoriness nyob rau hauv Load (RUL T0.6): >= 1320℃rau 1350 degree
Bulk Density:2.10-2.18g / cm3
Pom tseeb Porosity: <= 22.0%
Cold Crushing Strength (CCS): >= 25.0 rau 30.0 MPa
2. Qib thib peb High-Alumina Brick (LZ-48)
Al2O3 Cov ntsiab lus:48% mus rau 54%
Refractoriness: >= 1750 degree
Refractoriness nyob rau hauv Load (RUL T0.6): >= 1420 degree
Bulk Density:2.25-2.30g / cm3
Pom tseeb Porosity: <= 23.0%
Cold Crushing Strength (CCS): >= 40.0 MPa
3. Qib thib ob High-Alumina Brick (LZ-65)
Al2O3 Cov ntsiab lus:65% mus rau 70%
Refractoriness: >= 1790 degree
Refractoriness nyob rau hauv Load (RUL T0.6): >= 1460℃rau 1480 degree
Bulk Density:2.45-2.55 g / cm3
Pom tseeb Porosity: <= 22.0%
Cold Crushing Strength (CCS): >= 50.0 MPa
4. Qib Ib & Super-Lub Luag Haujlwm High-Alumina Brick (LZ-75 & LZ-80)
Al2O3 Cov ntsiab lus:75% mus rau 82%
Refractoriness: >= 1790 degree
Refractoriness nyob rau hauv Load (RUL T0.6): >= 1520℃rau 1550 degree
Bulk Density:2.65-2.80g / cm3
Pom tseeb Porosity: <= 20.0%
Cold Crushing Strength (CCS): >= 60.0 rau 75.0 MPa
Critical Engineering Metrics: RUL, Creep & Slag Attack
Thaum ntsuas ibalumina silica cib, cia siab rau ntawm chav tsev kub compressive zog (CCS) yog ib qho txaus ntshai shortcut. Muaj kev ua tau zoo hinges ntawm peb qhov ntsuas kub siab:
Refractoriness nyob rau hauv Load (RUL T0.6):Standard refractoriness qhia tau hais tias thaum lub unloaded cone melts. Txawm li cas los xij, RUL ntsuas qhov ntsuas qhov ntsuas qhov tseeb ntawm qhov 50 hli cylindrical qauv compresses 0.6% nyob rau hauv qhov nruam load ntawm 0.2 MPa. Hauv fireclay, cov iav matrix softens thaum ntxov, ua rau deformation qis li 1320 degree. Nyob rau hauv 75% alumina cib, qhov ntom ntom sib txuas ntawm mullite thiab corundum tswj cov qauv geometry saum toj 1520 degree.
High-Temperature Creep Rate:Nyob rau hauv kub moj tej tawg qhov cub checker chambers thiab reheat rauv lub ru tsev, cib txhawb zoo li qub compression rau 10 mus rau 15 xyoo. Premium low-creep high-alumina bricks incorporate andalusite or fused corundum, tswj tus nqi qis dua 0.2% thaum lub sijhawm 50-teev tuav ntawm 1400℃hauv qab 0.2 MPa load.
Slag Attack & Tshuaj Corrosion: Alumina-silica refractories are amphoteric to mildly acidic. At higher Al2O3 concentrations (>70%), lawv muaj zog tiv taus acidic metallurgical slags, hlau oxides, thiab thee combustion tshauv. Txawm li cas los xij, nyob rau hauv ib puag ncig yooj yim uas muaj cov CaO dawb, cov alumina cib siab ua rau muaj cov calcium aluminate tsawg-melting; nyob rau hauv tej cheeb tsam, yooj yim refractories los yog tshwj xeebkub refractory bricksyuav tsum tau teev tseg.
Kev Siv Hluav Taws Xob & Cov Khoom Siv Hluav Taws Xob
1. Blast furnaces & Kub tawg qhov cub
Blast furnace stacks thiab qhov cub siv ntau qhov chaw alumina-silica hauv ob sab phlu. Lub siab kub combustion chamber thiab lub checkerwork sab sauv yuav tsum tau 70% mus rau 75% low-creep high-alumina bricks kom tiv taus cyclic thermal blasts mus txog 1400 degree. Cov chaw kuaj xyuas qis dua hloov mus rau kev lag luamqib thib ob qib siab alumina cibthiab fireclay bricks qhov twg txhua yam muaj zog ntawm 800℃mus rau 1000℃yog qhov yuav tsum tau ib leeg.
2. Cement Rotary Kilns
Nyob rau hauv preheating thiab theem nrab calcining zones khiav hauj lwm ntawm 1000℃thiab 1250 degree, high-alumina bricks (xws li anti-stripping 70% alumina qib nrog ntxiv ZrO2) tsim ruaj khov txheej txheej. Backing rwb thaiv tsev feem ntau ua ke nrog nrujcalcium silicate boardkom txo lub plhaub kub poob qis dua 250 W / m2.
3. Steel Ladles & Tundishes
Secondary refining ladles siv 75% mus rau 80% alumina bricks nyob rau hauv cov chav kawm kev nyab xeeb thiab slag-dawb sidewall seem. Their dense texture (apparent porosity<= 18%) resists liquid steel penetration and turbulent washing during stirring.
Factory Direct Sourcing, Ntim & Cov Lus Cog Tseg
Procuring alumina-silica refractory bricks ncaj qha los ntawm ISO 9001 certified Tuam Tshoj manufacturers xyuas kom cov ntaub ntawv pov thawj tshuaj sib xws thiab nruj me ntsis kam rau ua:
Dimensional Tolerances:High-pressure hydraulic thiab kev sib txhuam presses (630 mus rau 1600 metric tons) tuav qhov raug nyob rau hauv +/- 1.0 hli rau cov qauv ncaj series (230x114x65 mm, T-3) thiab tapered wedge bricks (arch, wedge, thiab cov duab tseem ceeb), kom nruj masonry pob qij txha<= 2.0 mm.
Factory Quality Inspection:Txhua 50 metric tons tau dhau XRF tshuaj ntsuam xyuas, ntsuas qhov tseeb qhov tseeb, thiab kev kuaj xyuas lub zog txias. Daim ntawv pov thawj tag nrho zeb xeem (MTC) nrog rau txhua lub thawv export.
Export Ntim & Kev Tiv Thaiv:Cov cib yog teem rau ntawm fumigated ntoo pallets (ISPM 15 raws), interleaved nrog corrugated ntawv los xij los tiv thaiv kaum chipping, qhwv nyob rau hauv dual-txheej waterproof polyethylene stretch zaj duab xis, thiab ruaj nrog high-tensile PET strapping.
Nqe & MOQ:Kev lag luamalumina bricks nqiNws txawv ntawm alumina purity, zoo li complexity, thiab raw bauxite lag luam tiam sis. Standard ncaj series yuav tsum muaj qhov tsawg kawg nkaus txiav txim kom muaj nuj nqis (MOQ) ntawm 10 metric tons, thaum kev cai pwm duab nqa ib tug 20-tuj MOQ. Standard ntau lawm lub sij hawm yog 10 mus rau 15 hnub ua hauj lwm FOB Qingdao.
Rau cov ntaub ntawv cov ntaub ntawv cov khoom lag luam (TDS), cov khoom siv hluav taws xob ua kom sov, lossis cov lus hais lag luam, hu rau peb pab pawg muag khoom ntawminquiry@topower.tech.
