Xaiv txoj cai calcium aluminate cement binder txiav txim siab seb koj lub monolithic refractory hauv ob sab phlu muaj sia nyob thermal cycling los yog crumbles thaum pib qhuav tawm. Rau cov engineers rau cub tawg, precast block manufacturers, thiab cov neeg saib xyuas, xaiv ntawm tus qauv CA50, high-purity CA70, thiab ultra-refractory CA80 qib los rau matrix chemistry, ua hauj lwm qhib lub sij hawm, thiab kev pab cuam kub. Ntawm Topower Refractory, peb tsim thiab xa tawm hydraulic binders engineered rau ASTM thiab ISO cov qauv rau kev thov kev lag luam thoob ntiaj teb.
Cov Ntsiab Lus Qhia Txog Qhov Tseeb
Binder Qib Muaj: CA50 (Al2O3 50% mus rau 54%), CA60 (Al2O3 58% mus rau 62%), CA70 (Al2O3 68% mus rau 72%), thiab CA80 (Al2O3 78% mus rau 82%).
Qhov chaw tshwj xeeb: Blaine fineness 380 mus rau 430 m2 / kg kom ceev, ua tiav hydraulic reactivity yam tsis muaj unhydrated voids.
Txheem Ntim: 25 kg multi-ply noo noo-ntawv pov thawj hnab nrog PE zaj duab xis, los yog 1000 kg UV-resistant tej hnab rau tshav kub-kho export pallets.
Factory Direct SupplyStandard CA50 thiab CA70 nyob rau hauv warehouse stock; Lub sij hawm xa tuaj raws sijhawm 7 txog 12 hnub FOB Qingdao / Tianjin.
Calcium Aluminate Cement yog dab tsi?
Kev lees paub dav dav hauv kev lag luam kev lag luam raws li cov cement refractory los yog high-alumina cement, calcium aluminate cement yog hydraulic binder tsim los ntawm fusing los yog sintering qib high-qib bauxite los yog calcined alumina nrog ntshiab limestone. Tsis zoo li cov pa Portland cement, qhov twg tricalcium silicate tswj kev teeb tsa, qhov tshwj xeeb refractory binder tso siab rau monocalcium aluminate (CA, CaO·Al2O3) ua nws thawj theem hydraulic.
Thaum sib tov nrog dej huv, CA cov ntxhia theem reacts sai heev los tsim crystalline hydrate tes hauj lwm uas kaw graded aggregates rau hauv cov kab nrib pleb monolithic. Qhov kev ua haujlwm hydraulic no muab siab rau 24-teev lub zog txhua yam thiab refractoriness txog 1800℃nyob ntawm alumina purity. Thoob plaws steel ladles, cement rotary kilns, petrochemical heaters, thiab iav forehearths, ntshiabcalcium aluminate cement hmoovtsim cov qauv matrix ruaj khov ntawm hnyav-duty refractory castables.
CA50, CA60, CA70 thiab CA80 Kev sib piv
Lub refractoriness, tshuaj tiv thaiv, thiab teeb tsa kinetics ntawm refractory hydraulic binders nyob ncaj nraim ntawm lawv Al2O3 rau CaO piv thiab impurity pib (tshwj xeeb yog Fe2O3 thiab SiO2). Hauv qab no yog batch specification qhov tseem ceeb rau Topower Refractory coj mus muag qib:
| Technical Property / Metric | CA50 Qib (Standard) | CA60 Qib (Intermediate) | Qib CA70 (High Purity) | CA80 Qib (Ultra Purity) | Test Standard |
|---|---|---|---|---|---|
| Al2O3 Cov ntsiab lus (%) | 50.0 - 54.0 | 58.0 - 62.0 | 68.5 - 72.0 | 78.0 - 82.0 | ASTM C114 |
| CaO Cov ntsiab lus (%) | 31.0 - 35.0 | 28.0 - 32.0 | 26.0 - 29.5 | 16.0 - 20.0 | ASTM C114 |
| SiO2 Cov ntsiab lus (%) | <= 5.5 | <= 3.8 | <= 0.40 | <= 0.25 | ASTM C114 |
| Fe2O3 Cov ntsiab lus (%) | <= 2.5 | <= 1.8 | <= 0.25 | <= 0.15 | ASTM C114 |
| Main Mineral Phases | CA, C12A7 | CA, CA 2 | CA, CA 2 | CA2, CA6, alpha-Al2O3 | XRD Analysis |
| Pyrometric Refractoriness (zeeg) | 1420 - 1460 | 1500 - 1540 | 1580 - 1620 | >= 1780 | ISO 528 / Orton |
| Qhov tshwj xeeb (Blaine, m2 / kg) | 320 - 360 | 340 - 380 | 380 - 430 | 420 - 460 | ASTM C 204, ASTM C204, ASTM C204, ASTM C204, ASTM C204, ASTM C204, ASTM C204, ASTM C204, ASTM C 204, ASTM C204, ASTM C204, ASTM C204, ASTM C204, ASTM C204, ASTM C204, ASTM C204, ASTM C204, ASTM C204, ASTM C204, ASTM C204, ASTM C204, ASTM C 204, ASTM C204, ASTM C204, ASTM C204, ASTM C 204, ASTM C204, ASTM C204, ASTM C204, ASTM C204, ASTM C204 |
| Lub Sij Hawm Pib Pib (min) | 45 - 120 | 40 - 100 | 40 - 90 | 30 - 75 | Vicat Koob |
| Lub Sij Hawm Kawg (min) | 180 - 360 | 150 - 300 | 120 - 240 | 90 - 180 | Vicat Koob |
| 1-Hnub Compressive zog (MPa) | >= 50.0 | >= 55.0 | >= 65.0 | >= 75.0 | TS EN ISO 679 |
| 3-hnub Compressive zog (MPa) | >= 65.0 | >= 70.0 | >= 80.0 | >= 90.0 | TS EN ISO 679 |
Lus Cim: Txhua qhov ntau lawm tawm ntawm peb cov nroj tsuag nrog cov ntawv txheeb xyuas cov ntawv pov thawj (COA). Kev teeb tsa lub sijhawm tuaj yeem ua raws li kev cai nrog retarders lossis accelerators rau kev ua haujlwm kub lossis sub-zero installation.
Hydration Mechanism thiab Phase Conversion Kinetics
Nkag siab txog binder hydration kinetics yog qhov tseem ceeb rau kev tiv thaiv kev sib tsoo thiab tawg thaum lub tshuab ua kom sov:
1. Dissolution thiab Early Hydrate tsim
Thaum hydraulic aluminate hmoov sib tov nrog dej, calcium thiab aluminate ions yaj sai sai kom ncav cuag super-saturation. Tom qab lub sij hawm dormant induction (30 mus rau 60 feeb ntawm 20 degree), hexagonal hydrate crystals precipitate. Ntawm qhov kub thiab txias (15℃txog 25 degree), cov tshuaj tiv thaiv yields monocalcium aluminate decahydrate (CAH10) thiab dicalcium aluminate octahydrate (C2AH8), ntxiv rau amorphous alumina gel (AH3). Cov platelet interlocking crystals ua rau lub zog txias txias hauv 6 mus rau 12 teev.
2. Kev hloov dua siab tshiab
Hexagonal hydrates yog metastable. Nyob rau hauv sov ambient curing los yog thaum cua sov tshaj 35 degree, lawv hloov mus rau hauv hydrogarnet (C3AH6), lub cubic siv lead ua theem:
3 CAH10 ->C3AH6 + 2 AH3 + 18 H2O
Qhov kev hloov pauv theem no ua rau muaj qhov ntom ntom ntom ntom ntawm 1.72 g / cm3 rau 2.53 g / cm3. Qhov cuam tshuam ntim shrinkage qhib micro-pores, ua rau poob ib ntus hauv lub zog txias ntawm 300℃thiab 800 degree.
3. Engineering Solutions
Txhawm rau txuas qhov nruab nrab lub zog no, niaj hnub refractory castables suav nrog reactive silica fume lossis zoo tabular alumina. Cov reactive micro-powders reacts nrog calcium oxide nyob rau hauv nruab nrab firing kub, tsim ceramic bonds (anorthite thiab gehlenite) uas rov qab txheej ceev ua ntej lub ncov khiav hauj lwm kub.
Yuav Ua Li Cas Xaiv Cov Qib Cement Zoo
Xaiv cov qib binder kom zoo nyob ntawm qhov kub ntawm lub ntsej muag, slag chemistry, thiab cua sov cua:
Xaiv CA50 Thaum:
Ua hauj lwm kub nyob rau hauv 1400℃nyob rau hauv industrial boilers, rotary kiln txias zones, khib incinerator ductwork, los yog pawg linings.
Formulating txheem castables castables, phom sib tov, los yog cua-tsim refractory mortars uas tsis muaj hlau thresholds tsis tseem ceeb.
Maximizing thawj qhov project kev lag luam yam tsis tau them nyiaj rau cov khoom siv hluavtaws high-purity alumina raw khoom.
Xaiv CA70 Thaum:
Kev tsim tawmqis cement castable(LCC) los yog ultra-low cement castable (ULCC) linings khiav hauj lwm ntawm 1450℃thiab 1650 degree.
Ua haujlwm hauv kev txo cov cua uas muaj carbon monoxide (CO) lossis hydrogen (H2), xws li petrochemical cracking furnaces thiab blast furnace troughs. Tuav Fe2O3 hauv qab 0.25% tiv thaiv catalytic soot deposition thiab puas hauv ob sab phlu spalling.
Anchoring precast burner blocks los yog ladle cuam tshuam pads nrog qib siabstainless hlau anchors.
Xaiv CA80 Thaum:
Kev khiav hauj lwm kub-lub ntsej muag hauv ob sab phlu siab tshaj 1700 degree, nrog rau theem nrab steel refining ladles, nqus degassers, thiab slagging thee gasifiers.
Matrix purity xav tau zero silica paug kom tsis txhob qis-melting eutectic theem nyob rau hauv kev sib cuag nrog molten hlau los yog txhoj puab heev slags.
Hom Binder Dosage los ntawm Castable Hom
Formulating monolithic linings yuav tsum sib piv cov qib binder thiab ntau npaum li cas rau cov txheej txheem installation thiab ASTM C401 kev faib tawm:
| Monolithic Formulation Hom | Pom zoo Cement Qib | Hom Binder Dosage (% wt) | Kev ntsuas dej (% wt) | Ntsiab Matrix Feature |
|---|---|---|---|---|
| Conventional Castable (CC) | CA 50/CA 60 | 15.0% - 22.0% | 7.0% - 9.0% | Ceev ceev 24-hr demolding zog; kev lag luam dav dav. |
| Tsawg Cement Castable (LCC) | CA70 | 4.0% - 7.0% | 4.5% - 5.5% | Dense sub-micron particle packing; siab kub modulus ntawm rupture. |
| Ultra-low Cement (ULCC) | CA 70/CA 80 | 1.5% - 3.0% | 3.5% - 4.5% | Tsawg kawg nkaus CaO fluxing theem; superior slag corrosion kuj. |
| Refractory Gunning Mix | CA 50/CA 60 | 12.0% - 18.0% | Regulated ntawm nozzle | Kev sib koom tes ntsuab nrawm kom txo qis rov qab poob qis dua 15%. |
| Cua-Setting Mortar | CA50 | 20.0% - 30.0% | 18.0% - 22.0% | Fine grain nkag mus (< 0.2 mm) for tight brick joints. |
Kev sib xyaw dej thiab kho cov kev coj ua zoo tshaj plaws
Kev ua tsis tiav hauv teb nrog aluminate binders feem ntau taug qab rov qab mus rau qhov ntsuas dej ntau dhau lossis tsis tsim nyog khaws cia:
Tswj dej: Khaws cov dej ntxiv kom tsawg. Nyob rau hauv cov pa castables (15% mus rau 20% cement), tag nrho cov dej yuav tsum nyob nruab nrab ntawm 7.0% thiab 9.0%. Hauv cov txheej txheem deflocculated qis-cement (4% mus rau 7% cement), lub hom phiaj 4.5% mus rau 5.5% nrog polycarboxylate dispersants. Cov dej ntau dhau evaporates thaum tshav kub kub, tsim cov pores qhib uas degrade mechanical zog.
Zero Contamination nrog Portland Cement: Tsis txhob siv cov cuab yeej lossis cov khoom sib tov uas muaj cov khoom sib xyaw nrog Portland cement. Portland tso tawm calcium hydroxide, uas ua rau flash-teeb ntawm aluminate cements nyob rau hauv feeb, ua rau hnyav thermal tawg thiab crumbly installation.
Ambient Kub thiab Retarders: Nyob rau lub caij ntuj sov kub siab tshaj 30 degree, aluminate hydration accelerates sai, drastically shortening ua hauj lwm lauj kaub lub neej. Hauv peb cov kev kuaj sim, kev siv tshuaj 0.02% txog 0.05% citric acid txuas ntxiv qhov chaw qhib sijhawm los ntawm 25 feeb mus rau ntau tshaj 60 feeb yam tsis muaj kev puas tsuaj rau lub zog kawg 3-hnub. Hloov pauv, qis dua 10 degree, lithium carbonate tuaj yeem ua kom nrawm nrawm thaum ntxov demolding.
Moist Curing: Npog cov ntaub qhwv nrog cov ntaub ntub dej lossis cov ntaub ntawv polyethylene rau 24 teev. Vim hais tias aluminate hydration yog exothermic hnyav heev, ntxov ntxov nto ziab tshaib plab unhydrated hais thiab tawm tsis muaj zog, powdery nto.
Tswj Qhuav-Tawm: Ramp kub ntawm 15℃mus rau 20℃ib teev mus txog 150 degree, tuav rau 1 teev ib 25 mm ntawm lub thickness ntawm lub hauv ob sab phlu kom tso dej dawb, ua raws li los ntawm ib tug thib ob tuav ntawm 350℃tso chemically bound crystal dej nyab xeeb.
Ntim, Cia thiab Sourcing
Aluminate cement hmoov yog hygroscopic thiab yuav tsum tau txhim khu kev qha barrier ntim rau transoceanic shipping:
Kev tiv thaiv dej noo: Peb ntim tag nrho cov qib nyob rau hauv ntau phab ntsa kraft daim ntawv sacks nrog puab polyethylene noo noo barriers (25 kg / hnab). Cov hnab ntim ntim ntim cia rau ntawm qhuav, elevated pallets tuav tag nrho reactivity rau 6 mus rau 9 lub hlis.
Lump Inspection Txoj Cai: Yog tias lub hnab ntim cov pob thaum lub sijhawm khaws cia ntev, siv tes tuav. Cov pob mos mos uas txhuam tau yooj yim ntawm cov ntiv tes yog cov agglomeration zoo li qub thiab nyob nyab xeeb siv. Yog tias cov pob zeb tawv thiab gritty, ib nrab hydration tau tshwm sim; tsis txhob zuaj lossis tshuaj ntsuam lawv rau hauv cov castables ntau lawm, vim tias lub zog reactive binder muaj kev cuam tshuam tas mus li.
Bulk Super Sacks: Rau lub peev xwm siab castable blending nroj tsuag, peb muab 1000 kg polypropylene lub hnab loj nrog PE liners thiab hauv qab tso tawm spouts.
Traceable Mill Certificate: Txhua batch raug kuaj XRD theem, Blaine fineness tsom xam, thiab 24-teev compressive zog pov thawj ua ntej thawv xa.
Transparent Sourcing: Nqe & Yuav Ua Li Cas
Topower Refractory muab cov chaw tsim khoom ncaj qha rau cov neeg tsim khoom refractory, metallurgical nroj tsuag, thiab cov neeg cog lus pej xeem:
Technical RFQ Checklist
Kom tau txais cov lus hais hauv 4 teev, muab:
Lub Hom Phiaj Qib: CA50, CA60, CA70, lossis CA80 (los yog qhia koj cov kev txwv Al2O3 thiab Fe2O3).
Hom kev teeb tsa: Vibration casting, pumpable self-flow, gunning, or mortar jointing.
Order Tonnage: Yam tsawg kawg nkaus txiav txim yog 5 metric tons rau CA50 / CA70, thiab 1 metric ton rau CA80.
Ntim Hom: 25 kg sacks on shrink-wrapped pallets or 1000 kg bulk bag.
Chaw nres nkoj: Rau tam sim FOB Qingdao / Tianjin lossis CIF tus nqi suav.
Nqe Reference: Standard CA50 feem ntau yog nyob nruab nrab ntawm 350 thiab 520 USD ib metric tuj FOB Tuam Tshoj, thaum qis-hlau hluavtaws CA70 thiab CA80 qib ntawm 750 mus rau 1450 USD ib metric tuj raws li alumina purity thiab raw khoom siv zog nqi.
Kev nug: Hu rau peb pab pawg muag khoom engineering ncaj qha ntawminquiry@topower.techrau batch datasheets thiab dawb 2 mus rau 5 kg kuaj cov qauv.
Cov lus nug nquag
Dab tsi yog qhov sib txawv ntawm calcium aluminate cement thiab Portland cement?
Portland cement kho los ntawm calcium silicates uas tawg saum toj 350 degree, tso cov txiv qaub dawb. Nyob rau hauv sib piv, refractory aluminate cement cia siab rau monocalcium aluminate theem, muab kev ua haujlwm ruaj khov mus txog 1800℃thiab ua tiav tshaj 80% ntawm qhov kawg compressive zog hauv 24 teev.
Dab tsi yog qhov ntau npaum li cas ntawm calcium aluminate cement nyob rau hauv refractory castables?
Nyob rau hauv cov pa refractory castables, calcium aluminate cement feem ntau suav rau 15% mus rau 22% ntawm tag nrho cov khoom hnyav hnyav. Nyob rau hauv qib siab qis-cement castables (LCC), qhov ntau npaum li cas poob mus rau 4% mus rau 7% los ntawm kev ua ke nrog micro-silica lossis reactive alumina, uas ua rau txo qis cov kua theem tsim thiab txhim kho qhov kub thiab txias tsis kam.
Puas tuaj yeem aluminate cement linings lis acid thiab sulfate ib puag ncig?
Yog lawm. Vim tias aluminate hydration ua tsis muaj calcium hydroxide dawb, cov tawv tawv tawv tuaj yeem ua rau muaj kev tiv thaiv zoo rau biogenic sulfuric acid, hydrogen sulfide, carbon monoxide, thiab muaj sulfate nres, outperforming standard civil cements.
Vim li cas cov ntsiab lus hlau tsawg yuav tsum tau ua hauv CA70 thiab CA80 qib?
Hauv CO thiab H2 txo cov roj ib puag ncig, cov hlau oxides dawb ua raws li cov catalysts, faib cov pa roj carbon monoxide rau hauv cov pa roj carbon monoxide. Qhov no soot deposits nyob rau hauv matrix micro-pores, tsim sab hauv bursting stresses uas ua rau hauv ob sab phlu tsis ua hauj lwm. Tsawg-hlau CA70 thiab CA80 khaws Fe2O3 qis dua 0.25%, tiv thaiv cov pa roj carbon disintegration.
