Aluminium melting furnaces yog cov cuab yeej tseem ceeb hauv kev lag luam aluminium. Lawv cov ntaub ntawv ua haujlwm ncaj qha hu rau qhov siab -kub molten aluminium, slag, thiab gaseous ib puag ncig, yog li muab cov kev cai nruj heev rau kev ua haujlwm ntawm cov khoom siv refractory. Cov ntaub ntawv refractory yuav tsum muaj kev tiv thaiv corrosion zoo heev, tsis yog -wetting zog, thermal shock stability, thiab txhua yam muaj zog los xyuas kom meej lub neej ntawm lub cub tawg, lub zog efficiency, thiab kev ruaj ntseg ntau lawm. Qhov kev tshuaj xyuas no tsom rau qhov sib txawv ntawm cov cib refractory siv rau kev ua haujlwm hauv ob sab phlu thiab siab -kev ua tau zootsawg cement refractory castables.
Daim ntawv thov thiab yam ntxwv ntawm Refractory Bricks nyob rau hauv ua hauj lwm Liners ntawm Aluminium Melting Reverberating rauv
Refractory bricks yog ib txwm ua ua ntej- cov ntaub ntawv refractory, feem ntau yog ua los ntawm siab- cov ntaub ntawv purity (xws li alumina, silicates, los yog silicon carbide) los ntawm siab - siab molding thiab siab - kub sintering. Feem ntau siv rau hauv aluminium melting furnaces muaj xws li siab- alumina cib (Al₂O₃ cov ntsiab lus 70-90%), silica cib (SiO₂ dominant), thiab silicate cib. Cov cib no tsim nyog rau cov phab ntsa ntawm lub cub tawg, lub qhov cub hauv qab, thiab lub cub tawg.
Qhov zoo:
1: Cov neeg kho tshuab muaj zog thiab ntim ruaj khov: Ua kom muaj kev ncaj ncees ntawm qhov kub thiab txias (cov txheej txheem molten aluminium kub 700-900 degree), tiv thaiv kev poob siab thiab thermal stress. Piv txwv li, high-alumina cib tuaj yeem ua tiav lub zog compressive ntawm 50-100 MPa, haum rau cov cheeb tsam raug molten aluminium ntws.
2: Muaj zog corrosion kuj: Silica bricks muaj kev tiv thaiv zoo rau molten aluminium thiab alkaline slag, txo cov txhuas nkag thiab corrosion. Raws li cov ntaub ntawv, aluminium furnaces siv silica cib tuaj yeem txo nqi txij nkawm.
3: Cov thermal conductivity nruab nrab: Pab kom cov cua kub sib txawv hauv lub cub tawg, ua kom lub zog siv tau zoo.
Qhov tsis zoo:
1: Kev teeb tsa tsis yooj yim: Yuav tsum tau cib- los ntawm- cib siv, thiab cov pob qij txha tuaj yeem ua rau cov ntsiab lus tsis muaj zog, ua rau aluminium to thiab ceev corrosion. Siab rhiab heev rau thermal poob siab, nquag tawg, tshwj xeeb tshaj yog nyob rau hauv ib puag ncig nrog rau kub kub hloov pauv loj.
2: Txwv tsis pub dhau: Cov qauv cib tau kho thiab tsis tuaj yeem hloov kho ntawm - qhov chaw kom haum rau cov slag muaj pes tsawg leeg (xws li, siab -sodium lossis siab -calcium slag).
Hauv kev lag luam thoob ntiaj teb, cov cib refractory feem ntau yog siv nyob rau hauv qhov tsis yog -cov chaw sib cuag ntawm cov cub tawg loj, tab sis cov ntaub ntawv ua haujlwm tau maj mam hloov los txhim kho kev ua haujlwm.
Daim ntawv thov thiab yam ntxwv ntawm qis-Cement Castables nyob rau hauv ua hauj lwm hauv ob sab phlu ntawm Aluminium Melting Reverberating rauv
Low Cement refractory Castables (LCCs) yog siab -kev ua tau zoomonolithic refractory khoomnrog rau cov ntsiab lus cement feem ntau qis dua 3%, feem ntau yog tsim los ntawm siab -purity aggregates (xws li corundum los yog aluminosilicate), micro- hmoov, thiab additives. Lawv raug tsim los ntawm -site casting los tsim ib lub seamless hauv ob sab phlu. Nyob rau hauv aluminium melting reverberating furnaces, LCCs feem ntau yog siv nyob rau hauv cov txheej txheem ua hauj lwm ntawm lub pas dej ua ke molten, nrog rau cov formulations xws li 75% siab-alumina, qis- cement castables.
Qhov zoo:
1: Zoo thermal poob siab tsis kam thiab porosity tsawg: Cov ntsiab lus cement qis txo cov khoom siv dej, cia porosity tswj tau qis dua 15%, txhim kho impermeability. Raws li cov lus ceeb toom, LCCs nthuav tawm 30-50% siab dua thermal poob siab dua li cov tsoos castables, ua rau lawv tsim nyog rau ib puag ncig nrog kev hloov kub ceev.
2: Tsis yog - ntub dej thiab corrosion tsis kam: Tsis yog - cov khoom ntub dej (xws li BaSO₄ lossis AlF₃) tuaj yeem muab ntxiv los tiv thaiv kev yaig los ntawm molten aluminium thiab slag. Cov ntaub ntawv hais txog tias tsis yog- cov khoom ntub dej ntub dej tuaj yeem txo cov adhesion ntawm txhuas thiab txuas rau lub tshuab hluav taws xob rau 12-24 lub hlis.
Kev tsim kho tau zoo: Muaj zog fluidity thiab tus kheej -flowability tso cai rau siv thiab casting, tsim ib tug monolithic hauv ob sab phlu thiab txo kev sib koom ua ke. Tsawg thermal conductivity (kwv yees li 1-2 W / m·K) pab txuag hluav taws xob.
3: Kev hloov pauv siab: Nrog rau cov neeg siv cov lus pom zoo, LCC cov qauv tuaj yeem hloov kho raws li cov xwm txheej smelting (xws li, siab - impurity slag nyob rau hauv lwm yam txhuas smelting) los yog slag muaj pes tsawg leeg (xws li, siab -silica slag), xws li kho cov micron hmoov piv los yog ntxiv cov tshuaj tiv thaiv - cov kab mob slag.
Qhov tsis zoo:
Kev txhim kho lub zog pib yog nyob ntawm kev ziab thiab sintering: kev ua haujlwm tsis raug tuaj yeem ua rau tawg lossis tsis muaj zog.
Tus nqi siab dua: Cov khoom siv raw thiab cov nqi ntxiv yog siab dua li cov cib zoo tib yam, tab sis ntev - cov nqi kho mob raug txo.
Hauv kev siv thoob ntiaj teb, European txhuas cov nroj tsuag dav siv LCC rau reverberatory furnace ua hauj lwm linings, combining innovation los txo carbon emissions thiab zog noj.
Qhov sib txawv thiab kev sib piv ntawm Refractory Bricks thiab qis -Cement Refractories (LCCs)
Qhov sib txawv tseem ceeb ntawm cov cib refractory thiab LCCs nyob rau hauv kev ua hauj lwm hauv ob sab phlu ntawm aluminium melting furnaces dag nyob rau hauv lawv molding txoj kev, kev ua tau zoo adaptability, thiab daim ntawv thov scenarios. Cov kev sib piv hauv qab no yog tsim los ntawm ntau qhov ntev:
Moulding thiab Kev Tsim Kho:
Refractory Bricks: Ua ntej- tsim cov blocks, xav tau kev teeb tsa ntawm phau ntawv, ua rau lub sijhawm tsim kho ntev (ntau hnub) thiab nyiam tsim cov pob qij txha.
LCCs: Cam khwb cia rau hauv -situ, seamless monolithic qauv, kev tsim kho sai (ntau teev), haum rau ntau hom cub tawg.
Performance Parameters:
- Mechanical Strength: Cov cib muaj zog dua (compressive zog> 50 MPa), tab sis LCCs khaws lub zog zoo dua tom qab thermal shock.
- Corrosion Resistance thiab Non-Wetting Properties: LCCs zoo tshaj los ntawm kev ua kom zoo dua ntxiv, txo qis kev nkag mus rau txhuas; bricks cia siab rau cov khoom siv hauv paus thiab muaj qhov ua tsis tiav ntawm cov pob qij txha.
- Thermal Shock Stability: LCCs muaj kev tiv thaiv zoo dua vim lawv qhov porosity tsawg thiab micro- hmoov qauv, thaum cib yog qhov yooj yim dua rau kev tawg.
- Thermal Conductivity thiab Energy Saving: LCCs muaj cov thermal conductivity qis dua, ua rau muaj kev txuag hluav taws xob tseem ceeb.
Economy thiab Lifespan:
- Tus nqi pib: Cov cib muaj nqi qis dua tab sis yuav tsum tau saib xyuas ntau zaus; LCC muaj cov nqi pib ntau dua tab sis kev ua neej ntev dua thiab qis dua tag nrho cov nqi (LCC qhia kev txuag hluav taws xob ntawm 20-30%).
Nyob rau hauv aluminium melting furnace linings, tsawg cement refractory castables qhia superior tag nrho kev ua tau zoo piv rau refractory cib, tshwj xeeb tshaj yog nyob rau hauv thermal shock resistance, corrosion resistance, thiab kev tsim kho efficiency. Cov kev soj ntsuam cov neeg siv yog qhov tseeb: qhov yooj ntawm LCC tso cai rau kev tsim kho kom zoo raws li cov xwm txheej smelting (xws li, qhov kub thiab txias) thiab cov slag muaj pes tsawg leeg (xws li, alkali hlau cov ntsiab lus), ua tau zoo dua adaptability. Txawm li cas los xij, kev xaiv yuav tsum tau xav txog qhov cub loj, pob nyiaj siv, thiab kev ua haujlwm; rau qhov cub me me lossis tus nqi- cov xwm txheej rhiab heev, cov cib refractory tseem tuav qhov zoo. Cov tuam txhab kev lag luam txhuas raug qhia kom ua ntej LCC txhawm rau txhim kho kev ua tau zoo thiab siv tau cov txheej txheem tshwj xeeb los ntawm kev sim kuaj. Nyob rau hauv lub neej yav tom ntej, nrog rau kev loj hlob ntawm nano{9}} additives, LCC yuav dominate lub ntiaj teb no txhuas smelting kev lag luam.
