High Alumina Castables yog tsim los siv 75-88% siab-alumina aggregates los ntawm downdraft kilns thiab 88% siab- alumina nplua hmoov ua cov khoom zoo. Cov khoom siv raw ntxiv muaj xws li -Al₂O₃ micro hmoov, silica micro hmoov, thiab lwm cov hmoov zoo, ua ke nrog cov dej tswj hwm - txo tus neeg sawv cev. Los ntawm optimizing hom thiab ntau npaum li cas ntawm expansion additives, lub castable lub matrix muaj pes tsawg leeg yog tailored kom ua tau zoo heev - kub creep kuj, thermal shock stability, thiab siab load softening kub.
Piv nrog rau cov qauv tsim, siab alumina castables tso siab dua rau kev ua haujlwm nkag siab, thermal shock resistance, thiab load softening kub. Kev hloov pauv hauv qhov loj me me, kev sib koom ua ke ntawm cov khoom siv tshwj xeeb, thiab txo cov ntsiab lus ntawm cov cement txhim kho kev ua tau zoo los ntawm kev nce qib nruab nrab- qhov kub thiab txias thiab load softening kub, thaum txo cov thermal conductivity, ua rau cov thermal efficiency zoo dua. Cov castables no nthuav tawm impermeability, yaig tsis kam, hnav tsis kam, thiab cov khoom siv zoo, ua rau muaj zog tag nrho cov qauv ntawm lub cub tawg, txhim kho airtightness piv rau cib- ua rauv taws, txuas ntxiv lub neej, txo tus nqi tu, thiab cov txiaj ntsig kev lag luam.
Thaum lub sijhawm ua haujlwm siab - kub, qhov sib txawv ntawm qhov sib txawv tuaj yeem ua rau nthuav dav thaum andalusite hloov mus rau mullite. Yog li ntawd, andalusite tuaj yeem ua tswvcuab ua ib qho ntxiv. Tsis tas li ntawd, nws yog xim hlau silicon tuaj yeem muab tso ua ke los ua kom zoo dua cov matrix muaj pes tsawg leeg, uas txo qis shrinkage, txhim kho siab - kub tsis kam, thiab ntxiv txhim kho creep resistance, thermal shock stability, thiab load softening temperatur.
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NPE/INDEX / khoom |
UNIT |
High alumina refractory castable |
High alumina, siab zog, qis cement Refractory castable |
High alumina, siab zog, qis cement Refractory castable |
High alumina, siab zog, qis cement Refractory castable |
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G-14 |
G-15 |
G-16 |
G-16K |
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Tshuaj muaj pes tsawg leeg |
Al2O3 Ntau dua lossis sib npaug |
% |
60 |
65 |
70 |
75 |
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SiO2 Ntau dua lossis sib npaug |
25 |
20 |
20 |
20 |
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Txias modulus ntawm rupture Loj dua los yog sib npaug |
110℃× 24h |
MPa |
8.0 |
10 |
10 |
10 |
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1100℃× 3h |
8.0 |
12 |
12 |
10 |
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Txias crushing zog Ntau dua los yog sib npaug |
110℃× 24h |
MPa |
80 |
80 |
80 |
100 |
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1100℃× 3h |
80 |
100 |
100 |
100 |
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Qhov ntom ntom 110℃× 24h Ntau dua lossis sib npaug |
g/cm³ |
2.45 |
2.55 |
2.65 |
2.75 |
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Kev hloov pauv tom qab cua sov (1100℃× 3h) |
% |
-0.1--0.3 |
-0.1--0.3 |
-0.1--0.3 |
-0.1--0.3 |
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Ua haujlwm kub siab tshaj plaws |
degree |
1450 |
1500 |
1600 |
1650 |
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Kev tsim kho siv dej ntxiv tus nqi |
% |
6-7.5 |
6-7 |
5.5-6.5 |
4.5-5.5 |
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Txoj kev tsim kho |
Kev vibration |
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Yam ntxwv |
Ntxiv cov cua sov-resistant steel fiber ntau raws li cov neeg siv khoom xav tau |
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High alumina castables feem ntau siv hlau silicon, kyanite, los yog andalusite ua tus neeg sawv cev nthuav. Txhua yam ntawm cov ntaub ntawv no ua rau muaj kev tswj hwm kev nthuav dav thiab txhim kho qhov siab - qhov kub thiab txias ntawm cov castable:
Hlau Silicon:
Ntawm qhov kub thiab txias, nws yog xim hlau silicon dhau oxidation, nitriding, thiab mullitization tshwm sim, uas ua rau kom cov creep tsis kam ntawm siab alumina castables.
Kyanite:
Thaum lub sij hawm cua sov, kyanite hloov mus rau hauv ib tug sib tov ntawm mullite thiab SiO₂, nrog rau volume expansion ntawm 16% -18%. Qhov kev hloov pauv no ua rau lub qhov dej zoo-tsim acicular mullite network, thiab qhov tshwm sim ntawm qhov hloov pauv yog qhov tsawg kawg nkaus thaum txias, nthuav tawm qhov kev nthuav dav tsis tuaj yeem txhim kho cov castable cov qauv kev ruaj ntseg.
Andalusite:
Raws li ib tug tswv cuab ntawm pawg kyanite, andalusite hloov mus rau hauv mullite thaum lub sij hawm cua sov, tsim ib tug tswj ntim expansion ntawm kwv yees li 4%. Qhov no irreversible crystal transformation ua rau superior refractory zog, xws li:
●Refractoriness tshaj 1800 degree
●Resistance rau cua kub ceev thiab txias
●High mechanical zog thiab thermal shock kuj
●Zoo heev slag kuj
●Siab load- bearing transformation point
●Zoo tshuaj stability
●High Refractoriness:
Raws li qhov siab -alumina system, haum rau nruab nrab- thiab siab -kub rau cov ntawv thov.
●Stable Mechanical Strength:
Tuav lub zog zoo txhua yam ntawm ob qho tib si ambient thiab siab kub, kom ntseeg tau cov qauv kev ua tau zoo.
●Zoo Dimensional Stability:
Cov khoom pov thawj qis siab - qhov kub thiab txias thiab muaj zog tiv thaiv kev tawg thaum lub sijhawm ua haujlwm ntev -.
●Strong Construction Adaptability:
Tsim nyog rau kev tsim kho monolithic, tso cai rau kev txhim kho thiab seamless hauv ob sab phlu.
●Tus Nqi Ua Haujlwm Zoo:
Muab cov kev ua tau zoo txhim khu kev qha nrog kev siv dav, muab tus nqi - cov tshuaj refractory zoo.
High alumina castables yog dav siv hauv:
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Cov cua kub cua sov, cov cua sov so, thiab cov qhov cub kub kub hauv kev lag luam metallurgical |
Boiler furnaces, flues, thiab cua chambers hauv kev lag luam fais fab
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Preheaters, decomposition furnaces, thiab tertiary cua ducts hauv kev lag luam cement |
Cracking furnaces thiab cua sov rauv hauv petrochemical kev lag luam
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Ua hauj lwm thiab cov txheej txheem hauv ob sab phlu ntawm ntau yam kev lag luam furnaces thiab kiln
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Ntim:50 kg noo noo-cov ntaub ntawv pov thawj cov hnab ntim khoom, palletized rau kev nyab xeeb kev thauj mus los.
Cia:Khaws rau hauv qhov chaw qhuav thiab zoo- qhov cua, tiv thaiv los ntawm ya raws thiab nag.
Cim npe nrov: Tuam Tshoj siab alumina castable manufacturers, lwm tus neeg, Hoobkas