Thaum twgsiab alumina cibsab saum toj tawm, corundum cib pib. Lub ciam teb yog kwv yees li 1650℃kev pabcuam txuas ntxiv - saum toj no qhov kub thiab txias, alumina cib siab pib deform nyob rau hauv load, thiab Al₂O₃ cov ntsiab lus ntawm 90% + dhau los ua qhov tsawg kawg nkaus.
Corundum cib tsis yog ib qho khoom siv. Muaj fused corundum cib nrog Al₂O₃ nce mus txog 99%, sintered corundum cib nyob rau hauv 92-96% ntau, thiab corundum-mullite composites uas pauv qee qhov purity kom zoo dua thermal poob siab. Xaiv qhov tsis ncaj ncees lawm hauv lub khob rauv los yog daim ntawv thov EAF txhais tau hais tias txoj hauj lwm relining ntsuas hauv lub hlis, tsis yog xyoo.
Nplooj ntawv no suav tag nrho peb hom, cov specs uas tseem ceeb, qhov twg txhua hom ua haujlwm, thiab yuav ua li cas kom raug.
Corundum Brick vs High Alumina Cib - Qhov Chaw Nyob
High alumina cib: 45-90% Al₂O₃. Corundum cib: 90-99% Al₂O₃. Cov kab sib faib tshuaj yog 90% Al₂O₃.
Qhov kev ua haujlwm sib txawv yog qhov kub thiab txias. High alumina cib nrog 85% Al₂O₃ muaj RUL T₀.₅ nyob ib ncig ntawm 1550 degree. Ntawm 1650℃kev pabcuam txuas ntxiv, nws yuav nkag mus. Corundum cib ntawm 95% Al₂O₃ muaj RUL T₀.₅ saum 1700℃- nws tuav nws cov duab nyob rau hauv qhov kub thiab txias uas rhuav tshem cov qauv siab alumina.
Tus nqi sib txawv yog qhov tseem ceeb: corundum cib feem ntau raug nqi 3-5 × tus nqi ntawm 80% siab alumina cib ntawm ib lub hauv paus. Rau feem ntau cov ntawv thov qis dua 1600 degree, tus nqi them ntawd tsis raug cai. Rau cov iav cub tawg, EAF cov cheeb tsam sab saud, thiab cov ru tsev ceramic kiln saum toj 1650 degree, nws yog tib qho kev xaiv uas muab kev txhawb nqa lub neej.
Peb Hom Corundum Cib piav qhia
Fused Corundum Cib (Fused Cast / Dawb Fused Alumina)
Ua los ntawm dawb fused alumina (WFA) - Al₂O₃ Ntau dua lossis sib npaug li 99% - ua cov khoom siv tseem ceeb, nrog aluminium titanate lossis iav-theem binders. Ua los ntawm fusion casting lossis high-pressure sintering.
Khoom: siab tshaj plaws (3.4-3.5 g / cm³), qis porosity (8-12%), siab tshaj tshuaj tiv thaiv. Qhov zoo tshaj plaws rau ncaj qha molten iav tiv tauj thiab slag kab aav nyob rau hauv iav furnaces.
Kev txwv: qis tshaj thermal shock tsis kam ntawm peb hom. Tsis pom zoo rau daim ntawv thov nrog ceev thermal cycling.
Sintered Corundum Cib
Ua los ntawm sintered Al₂O₃ aggregate (92–96% Al₂O₃) nrog me me ntxiv ntawm TiO₂ lossis MgO ua sintering pab. Tawm ntawm 1700-1750 degree.
Properties: bulk ntom 3.0-3.3 g / cm³, pom porosity 12-16%, zoo tshuav ntawm lub zog thiab thermal shock kuj. Qhov feem ntau tau teev tseg corundum cib rau kev siv kub-kub.
Qhov zoo tshaj plaws rau: EAF lub plhaub sab sauv, cov cement kiln lub ntsiab cheeb tsam ntawm qhov siab Al₂O₃ yuav tsum tau, siab kub-kub tshuaj reactor linings.
Corundum-Mullite Cib
Muaj 70-85% Al₂O₃ nrog qhov sib npaug li mullite (3Al₂O₃·2SiO₂). The mullite theem ua raws li lub thermal shock tsis - nws faib micro-kawg nyob rau hauv thermal stress, tiv thaiv kev puas tsuaj spalling.
Properties: bulk ntom 2.75-2.95 g / cm³, pom porosity 15-20%, RUL T₀.₅ 1600-1650 degree. Cov tshuaj purity qis dua cov ntshiab corundum tab sis zoo dua thermal shock kuj.
Qhov zoo tshaj plaws rau: iav rauv sab sauv qauv, ceramic kiln structural Cheebtsam, kev siv nrog txhua hnub thermal cycling saum 1500 degree.
Tag Nrho Specification Sib Piv Table
| Khoom | Fused Corundum | Sintered Corundum | Corundum-Mullite |
|---|---|---|---|
| Al₂O₃ (%) | 98–99 | 92–96 | 70–85 |
| SiO₂ (%) | <0.5 | 1–3 | 12–22 |
| Qhov ceev (g / cm³) | 3.40–3.55 | 3.00–3.30 | 2.75–2.95 |
| Pom tseeb porosity (%) | 8–12 | 12–16 | 15–20 |
| CCS (MPa) | 150–200 | 100–160 | 80–130 |
| RUL T₀.₅ (degree) | 1750+ | 1680–1720 | 1600–1650 |
| Max kev pab temp (degree) | 1800+ | 1750 | 1700 |
| Thermal shock resistance | Tsawg | Nruab nrab | Siab |
| Slag kuj | Zoo heev | Zoo heev | Zoo |
| Tus txheeb ze nqi index | 5× | 3–4× | 2.5–3× |
Lub hauv paus siv: 80% Al₂O₃ siab alumina cib=1 ×. Tau qhov twg los: in-house production data.
Kev siv iav rauv - Qhov twg Corundum khwv tau nws tus nqi
Iav furnaces yog lub lag luam tseem ceeb rau corundum cib. Qhov chaw melting ua haujlwm ntawm 1550-1650℃nrog kev sib cuag ncaj qha ntawm molten iav thiab hauv ob sab phlu. Txheem siab alumina cib yaj hauv iav yaj hauv lub hlis. Corundum cib nrog ntau dua los yog sib npaug rau 99% Al₂O₃ yog tib txoj kev xaiv rau cov iav ncaj qha.
yas:Fused corundum los yog sintered corundum, 230mm txheem thickness. Kub kub: 1550-1600 degree. Lub hom phiaj phiaj xwm phiaj xwm: 8-12 xyoo nyob rau hauv lub qhov cub uas muaj iav float zoo.
Melting zone sidewall thiab hauv qab:Fused corundum los yogAZS (alumina-zirconia-silica) cib. Hauv qab kab iav, AZS yog tus qauv. Saum iav kab hauv kev sib cuag nrog corrosive vapor, corundum ua tau zoo dua.
Upper qauv thiab regenerator:Corundum-mullite cib rau thermal shock kam rau ua. Lub regenerator pom kev caij tsheb kauj vab los ntawm ambient mus rau 1400℃thaum lub sij hawm rov qab valve - mullite theem absorbs qhov kev ntxhov siab.
Ib tsob ntoo ntab iav hauv Middle East tau hloov pauv lawv 90% Al₂O₃ siab alumina yas nrog peb 95% sintered corundum cib hauv 2023. Cov yas qub dhau los siv sijhawm 6 xyoo. Kev teeb tsa tam sim no tau mus txog xyoo 3 uas tsis muaj qhov ntsuas qhov ntsuas tau ntawm qhov ntsuas txias kawg.
EAF thiab Petrochemical Applications
Electric Arc Rauv (EAF) Upper Zone
EAF refractory khoomKev khiav hauj lwm kub ncav cuag 1600-1700℃ntawm lub plhaub sab sauv. MgO-C cib tuav cov kab slag, tab sis lub plhaub sab saud ntawm cov kab slag tau txais txiaj ntsig los ntawm corundum cib ua ke ntawm qhov kub thiab txias tsis kam thiab tiv thaiv cov hlau oxide plua plav nkag.
Sintered corundum cib (93-95% Al₂O₃) yog tus qauv specification rau EAF lub plhaub sab sauv. CCS yuav tsum tau: yam tsawg kawg 100 MPa. Pom tseeb porosity: siab tshaj 16%.
Petrochemical Cracking Rauv
Qhov cub tawg ntawm qhov cub khiav ntawm 1000-1250℃nyob rau hauv qhov chaw radiant, tab sis cov roj kub kub thiab cua daj cua dub sib cais tuaj yeem ncav cuag 1400-1600 degree. Corundum-mullite cib (75-85% Al₂O₃) ua haujlwm rau cov cheeb tsam no zoo, nrog rau theem mullite muab cov thermal shock tiv thaiv thaum lub sij hawm kev ntxhov siab.
Tseem ceeb spec: Fe₂O₃ <0.8% rau hydrocarbon cracking daim ntaub ntawv - hlau ua raws li ib tug coking catalyst thiab txo lub cub tawg ntev.
High-temperature Ceramic Kilns
Tshwj xeeb ceramics kilns firing ntawm 1650-1750℃siv sintered corundum cib rau kiln pem teb thiab setter txhawb. Qhov yuav tsum tau muaj: dimensional stability nyob rau hauv lub luj ntawm lub ceramic load ntawm kev khiav hauj lwm kub.
Nyeem Corundum Cib COA - 5 Tus lej ntawd tseem ceeb
Txhua corundum cib xa tuaj yuav tsum tuaj nrog Daim Ntawv Pov Thawj Kev Ntsuam Xyuas. Nov yog dab tsi los kuaj:
1. Al₂O₃ cov ntsiab lus.Xyuas kom tseeb tias nws nyob rau hauv 2% ntawm cov qib teev tseg. Ib "99% Al₂O₃" cib ntawm 96.5% ntawm COA tsis yog qhov koj xaj.
2. SiO₂ cov ntsiab lus.Rau fused corundum, SiO₂ yuav tsum yog<0.5%. Higher SiO₂ indicates impure raw material or mullite contamination.
3. Fe₂O₃ cov ntsiab lus.Hom phiaj<0.5% for glass furnace applications, <0.8% for petrochemical. Iron causes glass discoloration and promotes coking.
4. Tej qhov ntom ntom.Rau fused corundum, txhua yam hauv qab 3.35 g / cm³ qhia tsis tiav fusion lossis siab porosity - ob qho tib si txo cov tshuaj tiv thaiv thiab lub zog txhua yam.
5. CCS.Nug tom qab tua CCS (tom qab 1600℃firing), tsis yog tom qab ziab ntawm 110 degree. Lub siab CCS ntawm 110℃tuaj yeem poob qis tom qab kev pabcuam kub.
Peb muab tag nrho tsib qhov ntsuas ntawm txhua pawg COA. Traceability: ntau tus lej → hnub tsim khoom → cov khoom siv raw.
Factory Direct Sourcing: MOQ, Lead Time & Sample Policy
Kev Siv Tus Nqi (2025, FOB Qingdao)
| Hom | Nqe ib thooj (USD, txheem 230 × 114 × 65mm) | Ib metric tons (USD) |
|---|---|---|
| Corundum-mullite (75% Al₂O₃) | 3.50–5.00 | 850–1,100 |
| Sintered corundum (93-95% Al₂O₃) | 5.00–8.00 | 1,200–1,800 |
| Fused corundum (98-99% Al₂O₃) | 8.00–14.00 | 2,000–3,200 |
MOQ:
Txuj ci cib: 50 daim (piv txwv) / 500 daim (kev txiav txim ntau lawm)
Cov duab kev cai (paj, koov, txiav tshwj xeeb): yam tsawg kawg 200 daim rau ib daim duab
Qhov kev txiav txim nrog ntau daim duab: ib daim duab pom zoo
Lub sijhawm ua:
Corundum-mullite: 15-20 hnub
Sintered corundum txheem qhov ntau thiab tsawg: 20-25 hnub
Fused corundum (cam khwb cia ntau lawm): 30-45 hnub
Cov duab kev cai ntxiv 10-15 hnub
Dawb qauv txoj cai:2-5 daim ib qib rau cov neeg yuav khoom tsim nyog nrog rau qhov project tshwj xeeb. Muab cov cuab yeej siv, txoj haujlwm hauv ob sab phlu, thiab kev pabcuam kub thaum thov cov qauv.
Cov lus nug nquag
Dab tsi yog qhov txawv ntawm corundum cib thiab siab alumina cib?
Corundum cib muaj Al₂O₃ cov ntsiab lus ntawm 90-99%, piv rau 45-90% rau siab alumina cib. Cov ntsiab lus alumina siab dua muab corundum cib ntau dua RUL (refractoriness nyob rau hauv load) - feem ntau 1680-1750℃vs . 1400-1600℃rau siab alumina. Corundum cib yog siv rau hauv qhov cub ua haujlwm siab tshaj 1600℃qhov siab alumina cib yuav deform lossis yaj. Nws raug nqi 3-5 × ntau dua rau ib daim.
Yam corundum cib hom twg yog qhov zoo tshaj plaws rau cov iav furnaces?
Rau qhov chaw tiv thaiv iav ncaj qha (melting tank hauv qab thiab hauv qab-iav-kab sidewall), fused corundum (99% Al₂O₃) lossis AZS cib muab cov tshuaj zoo tshaj plaws tiv thaiv iav corrosion. For the furnace crown and upper structure, sintered corundum (93–95% Al₂O₃) offers a better balance of temperature resistance and cost. For regenerator zones with thermal cycling, corundum-mullite provides better thermal shock resistance.
corundum cib tuaj yeem tiv thaiv thermal shock?
Fused corundum cib muaj cov thermal poob siab tsis kam thiab tsis haum rau cov ntawv thov nrog kev kub ceev ceev (ntau tshaj 200℃/ teev). Sintered corundum muaj cov thermal shock tsis kam. Corundum-mullite cib muaj qhov zoo tshaj plaws thermal shock tsis kam ntawm peb hom thiab tau pom zoo thaum caij tsheb kauj vab txhua hnub lossis cov txheej txheem ntxhov siab tsis tu ncua. Rau kev siv thermal cycling hnyav, ceramic fiber modules lossiscastable refractoriestej zaum yuav tsim nyog.
Dab tsi yog qhov tsawg kawg nkaus txiav txim kom muaj nuj nqis rau corundum cib?
Rau cov qauv ncaj cib (230 × 114 × 65mm): 50 daim rau cov qauv txiav txim, 500 daim rau kev txiav txim ntau lawm. Cov duab kev cai xav tau yam tsawg kawg nkaus ntawm 200 daim ib daim duab. Tag nrho qhov kev txiav txim nrog ntau daim duab tau hais los ntawm ib qho kev kos duab.
