Dab tsi ntawm siab alumina cib feem ntau siv nyob rau hauv industrial kilns?

High alumina cib hais txog cov khoom sintered uas muaj ntau tshaj 348% Al2O aluminosilicate los yog ntshiab alumina. Feem ntau, siab alumina cib muaj tsawg dua 80% Al2O3, thiab cov uas muaj ntau tshaj 80% Al2O3 hu ua corundum bricks. Piv nrog cov av nplaum cib, siab alumina cib muaj qhov zoo ntawm qhov siab refractoriness thiab siab softening kub nyob rau hauv load. Nyob rau hauv kev siv ntawm industrial kilns, ntau high alumina bricks poob rau hauv tsib pawg nram qab no.

(1) Ordinary siab alumina cib

Lub ntsiab ntxhia muaj pes tsawg leeg ntawm cib yog mullite, corundum thiab iav theem. Raws li cov ntsiab lus ntawm Al2O3 nyob rau hauv cov khoom nce, mullite thiab corundum kuj nce, lub iav theem yuav txo qis raws li, thiab cov refractoriness thiab kub ua hauj lwm ntawm cov khoom yuav nce raws li. Ordinary high-alumina cib muaj cov khoom siv hluav taws xob zoo dua li cov khoom siv av nplaum, thiab yog cov khoom siv nrog cov ntawv thov zoo thiab ntau yam kev siv. Nws yog dav siv nyob rau hauv ntau yam thermal kilns. Piv nrog rau cov khoom siv av nplaum, lub neej kev pab cuam ntawm lub kiln tuaj yeem txhim kho.

(2) High load mos siab alumina cib

Piv nrog rau cov zoo tib yam siab alumina cib, high-load mos high-alumina bricks yog txawv nyob rau hauv lub matrix ib feem thiab lub binder ib feem: lub matrix ib feem ntxiv nrog peb-pob zeb concentrate, thiab cov tshuaj muaj pes tsawg leeg tom qab tua yog ze rau lub theoretical muaj pes tsawg leeg ntawm mullite, uas yog tsim nyog qhia Siv high-aluminium cov ntaub ntawv, xws li corundum hmoov, high-aluminium corundum hmoov, thiab lwm yam .; xaiv cov av nplaum zoo kheej kheej li tus neeg sawv cev sib txuas, thiab siv cov av nplaum sib xyaw sib xyaw ua ke los yog mullite bonding agents nyob ntawm ntau yam. Los ntawm txoj kev saum toj no, lub load softening kub ntawm siab alumina cib tuaj yeem nce li ntawm 50 txog 70 ° C.

(3) Tsawg creep siab alumina cib

Txhim kho qhov creep tsis kam ntawm siab alumina cib los ntawm kev siv cov tshuaj tiv thaiv tsis sib npaug. Ntawd yog, raws li kev siv kub ntawm lub kiln, ntxiv peb-pob zeb ntxhia, activated alumina, thiab lwm yam rau lub matrix ua kom muaj pes tsawg leeg ntawm matrix nyob ze los yog tag nrho mullite, vim hais tias lub mulliteization ntawm matrix yuav twv yuav raug hu nce lub mullite. Cov ntsiab lus ntawm cov khoom siv, Txo cov iav theem cov ntsiab lus, thiab cov khoom siv zoo heev thiab thermal ntawm mullite yog qhov tsim nyog rau kev txhim kho qhov kub thiab txias ntawm cov khoom siv. Txhawm rau ua kom cov matrix tag nrho mullite, tswj Al2O3 / SiO2 yog qhov tseem ceeb. Tsawg creep siab alumina cib yog dav siv nyob rau hauv kub moj tej tawg furnaces, moj tej tawg rauv thiab lwm yam thermal kilns.

(4) Phosphate bonded siab alumina cib

Phosphate-bonded siab alumina bricks yog ua los ntawm compact super-qib los yog thawj-qib high-alumina bauxite clinker raws li lub ntsiab raw khoom, phosphate tov los yog txhuas phosphate tov raws li cov binder, tom qab ib nrab qhuav xovxwm molding, kev kho cua sov ntawm 400 ~ 600 ℃ Cov khoom siv hluav taws xob sib txuas ua ke refractory. Nws yog lub cib tsis raug rho tawm haujlwm. Txhawm rau kom tsis txhob muaj qhov ntim loj ntawm cov khoom thaum siv, nws yog ib qho tsim nyog yuav tsum tau ua kom paub cov khoom siv hluav taws xob nthuav dav, xws li kyanite, silica, thiab lwm yam, rau hauv cov khoom xyaw. Piv nrog rau ceramic bonded raug rho tawm haujlwm siab alumina cib, nws cov kev ua haujlwm tiv thaiv kev ua haujlwm zoo dua, tab sis nws qhov hnyav hnyav yog qis dua, thiab nws cov corrosion kuj tsis zoo. Yog li ntawd, ib qho me me ntawm fused corundum, mullite, thiab lwm yam yuav tsum tau ntxiv kom ntxiv dag zog rau cov matrix. Phosphate bonded siab alumina bricks yog dav siv nyob rau hauv cov cement teb kilns, hluav taws xob rauv lub ru tsev thiab lwm yam kiln.

(5) Micro-expansion siab alumina cib

Lub cib yog tsim los ntawm high-alumina bauxite ua cov khoom siv tseem ceeb, ntxiv nrog peb lub pob zeb concentrates, thiab ua raws li cov txheej txheem ntawm high-alumina cib. Txhawm rau kom nthuav dav lub siab alumina cib kom zoo thaum siv, tus yuam sij yog xaiv peb lub pob zeb mloog zoo thiab nws cov particle loj, thiab tswj qhov kub thiab txias, kom ib feem ntawm cov pob zeb uas tau xaiv peb lub pob zeb yog mullite thiab qee qhov ntawm peb. – pob zeb minerals tseem nyob. Qhov seem peb-pob zeb minerals yog ntxiv mulliteized (thaum thawj los yog theem nrab mulliteized) thaum siv, nrog rau ntim expansion. Cov pob zeb xaiv peb-pob zeb yog cov khoom siv zoo dua. Vim hais tias qhov decomposition kub ntawm peb lub pob zeb minerals txawv, qhov nthuav tawm los ntawm mullite petrochemical kuj txawv. Siv cov yam ntxwv no, siab alumina cib muaj qhov cuam tshuam txuas ntxiv vim qhov kub ua haujlwm sib txawv. Kev sib txhuam ntawm cov pob zeb cib txhim kho tag nrho cov compactness ntawm lub cev hauv ob sab phlu, yog li txhim kho cov kev tiv thaiv ntawm cov cib rau slag nkag.