High alumina castabletau dhau los ua ib qho ntawm feem ntau siv cov ntaub ntawv monolithic refractory nyob rau hauv niaj hnub industrial furnaces. Piv nrog rau cov pob zeb zoo li cov pob zeb refractory, siab alumina refractory castable muaj kev yooj yim dua, kev txhim kho yooj yim dua, thiab kev ua haujlwm zoo nyob rau hauv siab - kub thiab siab - hnav khaub ncaws. Rau cov nroj tsuag steel, cement kilns, non-ferrous metal furnaces, thiab petrochemical units, nkag siab txog qhov ua tau zoo ntawm aluminium castable siab -tshwj xeeb tshaj yog nws lub zog, qhov kub thiab txias tsis kam, thiab daim ntawv thov txwv - yog qhov tseem ceeb rau cov txheej txheem tsim thiab xaiv cov khoom siv.
Tprefractory muab cov ncauj lus kom ntxaws txog kev ua tau zoo ntawm siab alumina refractory castable los ntawm kev siv tshuab thiab daim ntawv thov - taw qhia qhov kev xav, pab cov neeg yuav khoom refractory thiab engineers txiav txim siab paub.
1. High Alumina Castable yog dab tsi?
High alumina refractory castable yog ib hom refractory castable formulated nrog siab - alumina aggregates thiab hmoov, feem ntau muaj Al₂O₃ qib ntawm 60% mus rau ntau tshaj 90%, ua ke nrog calcium aluminate cement los yog qis - cement bonding systems.
Nyob ntawm formulation, nws tuaj yeem faib ua:
Pa siab alumina refractory castable
Tsawg cement alumina castable (LCC)
Ultra{0}}tsawg cement alumina castable (ULCC)
Cement -dawb siab alumina refractory castable
Txhua hom yog tsim los ua kom tau raws li cov kev xav tau tshwj xeeb ntsig txog lub zog, qhov kub thiab txias, thiab kev pabcuam ib puag ncig.
2. Mechanical Strength Performance ntawm Alumina Castable
2.1 Cold Crushing Strength (CCS)
Ib qho ntawm cov cim tseem ceeb tshaj plaws rau cov khoom siv alumina siab castable yog txias crushing zog. Siab - zoo alumina castable feem ntau ua tiav:
24 h CCS:30-60 MPa
110℃qhuav CCS:40-80 MPa
Tom qab tua hluav taws (1000-1400 degree):lub zog nce ntxiv vim kev sib txuas ntawm ceramic
Tsawg cement thiab ultra- qis cement alumina castables qhia lub zog ntau dua piv nrog cov qauv tsim, ua rau lawv haum rau siab -load zones xws li lub cub tawg hearths thiab ladles.
2.2 Kub zog thiab Load Resistance
Ntawm qhov kub siab, siab alumina refractory castable tsim ceramic bonds tsim los ntawm alumina theem xws li mullite thiab corundum. Qhov no ua kom:
Stable kub modulus ntawm rupture (HMOR)
Zoo tsis kam mus deformation nyob rau hauv load
Txo cov txheej txheem tawg nyob rau hauv siab - qhov chaw kub
Rau cov ntawv thov uas xav tau lub neej kev sib tw ntev, lub zog kub feem ntau tseem ceeb dua li chav - qhov kub thiab txias.
3. Kev pab kub siab tshaj plaws thiab thermal stability
High alumina castable yog tsim tshwj xeeb rausiab -kev pabcuam kub, nrog kev khiav hauj lwm kub nyob ntawm alumina cov ntsiab lus thiab kev sib txuas lus.
| Alumina Cov ntsiab lus | Hom Max Service Temperature |
|---|---|
| 60-70% Al₂O₃ | 1400-1500 degree |
| 70-80% Al₂O₃ | 1500-1650 degree |
| 80-90% Al₂O₃ | 1650-1750 degree |
| Ntau dua lossis sib npaug li 90% Al₂O₃ | Mus txog 1800 degree |
Lub siab refractoriness ntawm alumina castable ua rau nws haum rau huab cua kub ib puag ncig qhov twg fireclay los yog qis -alumina castables yuav ua tsis tau ntxov ntxov.
4. Thermal Shock Resistance thiab Spalling Cwj Pwm
Thermal shock resistance yog ib qho kev txhawj xeeb tseem ceeb rau cov neeg yuav khoom ua haujlwm rau lub tshuab hluav taws xob uas nquag pib- nres cycles. High alumina refractory castable muaj kev txhim kho ua haujlwm vim:
Optimized particle loj faib
Txo cov ntsiab lus cement (hauv LCC thiab ULCC)
Tswj porosity thiab microcrack txoj kev loj hlob
Nyob rau hauv steel ladles, reheating furnaces, thiab cement kiln preheaters, siab alumina monolithic castable qhia tau hais tias tus nqi qis dua piv nrog cov tsoos refractory cib.
5. Tshuaj thiab Slag Resistance
High alumina castable qhia muaj zog tiv thaiv:
Acid slags
Neutral slags
Nruab nrab alkali ib puag ncig
Cov ntsiab lus Al₂O₃ siab txo cov tshuaj reactivity nrog cov ntaub ntawv molten, thaum ntom microstructures txwv slag nkag. Rau ntau qhov kev txhoj puab heev yooj yim slag, siab alumina refractory castable feem ntau hloov nrog cov khoom ntxiv xws li silicon carbide lossis spinel.
6. Hom kev siv ntawm High Alumina Castable
6.1 Steel Kev Lag Luam
High alumina monolithic castable yog dav siv hauv:
Ladle kev ruaj ntseg hauv ob sab phlu
Tundish cov ntaub ntawv ruaj khov
Reheating rauv phab ntsa thiab ru tsev
Burner blocks thiab cuam tshuam pads
Tsawg cement siab alumina refractory castable tshwj xeeb tshaj yog nyiam rau ladles vim nws lub neej ua haujlwm ntev thiab zoo thermal stability.
6.2 Cement Kev Lag Luam
Hauv cov nroj tsuag cement, cov khoom siv alumina siab castable ua tau zoo hauv:
Preheater cyclones
Kiln inlet thiab qhov hluav taws xob aav
Tertiary cua ducts
Cov ntaub ntawv txias
Nws tsis kam mus rau abrasion thiab thermal cycling pab txo kev txij nkawm zaus.
6.3 Tsis yog-Ferrous thiab Petrochemical Rauv
High alumina castable kuj tseem siv rau hauv:
Aluminium melting rauv
Copper thiab zinc smelting units
Khib nyiab incinerators
Petrochemical heaters thiab reactors
Nws versatility tso cai rau hloov mus rau complex cub tawg geometry qhov twg zoo li tus bricks yog impractical.
7. Kev txhim kho thiab kho kev txiav txim siab
Txawm tias qhov zoo tshaj plaws alumina castable yuav underperform yog tias ntsia tsis raug. Cov neeg yuav khoom yuav tsum ua tib zoo mloog rau:
Ntxiv dej kom zoo (tsis txhob dhau -dej)
Mechanical lossis vibration casting rau ntom ntim
Tswj curing thiab ziab kom qhuav
Maj mam ua kom sov-kom tiv thaiv kom tsis txhob tawg
Ua raws li cov chaw tsim khoom cov txheej txheem ua kom ntseeg tau tias qhov kev ua tau zoo ntawm cov khoom siv alumina siab castable tau tiav.
8. Yuav ua li cas cov neeg yuav khoom yuav tsum xaiv txoj cai siab Alumina Castable
Thaum muab lub siab alumina refractory castable, cov neeg yuav khoom yuav tsum ntsuas:
Alumina cov ntsiab lus thiab purity
Cement hom thiab feem pua
Ntau qhov ntom ntom thiab porosity
Cov ntaub ntawv pov thawj ntawm daim ntawv thov
Kev sib haum xeeb ntawm kev ua tau zoo thiab khoom siv
Xaiv cov qib kom raug raws li kev khiav hauj lwm kub thiab slag tej yam kev mob yog qhov tseem ceeb tshaj xaiv qhov siab tshaj plaws alumina cov ntsiab lus ib leeg.
Cov khoom siv alumina siab castable plays lub luag haujlwm tseem ceeb hauv cov ntaub ntawv refractory niaj hnub vim nws lub zog zoo heev, siab -kub tsis kam, thiab kev ua haujlwm yooj yim. Los ntawm steelmaking thiab cement ntau lawm mus rau non-ferrous metallurgy thiab petrochemical ua, siab alumina monolithic castable muab kev ntseeg tau zoo qhov twg cov khoom siv refractory tsoos luv luv.
Rau cov neeg yuav khoom refractory, kev nkag siab txog cov yam ntxwv ntawm kev ua haujlwm siab ntawm alumina refractory castable yog qhov tseem ceeb rau kev ua kom lub neej ua kom sov, txo qis qis, thiab tswj cov nqi tu.
