7 Hom Corundum Refractory Raw Cov Khoom Siv Feem Ntau Siv Hauv Refractory Castables

01 Sxav txog Corundum
Sintered corundum, tseem hu ua sintered alumina los yog semi-molten alumina, yog ib tug refractory clinker ua los ntawm calcined alumina los yog industrial alumina ua raw khoom, hauv av rau hauv pob lossis ntsuab lub cev, thiab sintered ntawm qhov kub ntawm 1750 ~ 1900 ° C.

Sintered alumina uas muaj ntau tshaj 99% ntawm txhuas oxide feem ntau yog ua los ntawm cov nplua-grained corundum ncaj qha ua ke. Cov roj emission tus nqi qis dua 3.0%, qhov ntim ceev nce mus txog 3.60% / cubic meter, lub refractoriness nyob ze rau lub melting point ntawm corundum, nws muaj zoo ntim stability thiab tshuaj stability ntawm kub kub, thiab tsis eroded los ntawm kev txo cua, molten iav thiab molten hlau. , zoo mechanical zog thiab hnav tsis kam ntawm qhov kub thiab txias.

02 ibFused Corundum
Fused corundum yog cov khoom siv corundum ua los ntawm melting ntshiab alumina hmoov nyob rau hauv ib tug high-kub hluav taws xob rauv. Nws muaj cov yam ntxwv ntawm lub siab melting point, siab mechanical zog, zoo thermal shock kuj, muaj zog corrosion kuj thiab me me linear expansion coefficient. Fused corundum yog cov khoom siv raw rau kev tsim cov khoom tshwj xeeb refractory qib siab. Feem ntau suav nrog fused dawb corundum, fused xim av corundum, sub-dawb corundum, thiab lwm yam.

03Fused Dawb Corundum
Fused dawb corundum yog tsim los ntawm ntshiab alumina hmoov thiab smelted ntawm kub. Nws yog xim dawb. Cov txheej txheem smelting ntawm dawb corundum yog ib qho txheej txheem ntawm melting thiab recrystallization ntawm industrial alumina hmoov, thiab tsis muaj cov txheej txheem txo. Cov ntsiab lus Al2O3 tsis tsawg dua 9%, thiab cov ntsiab lus impurity tsawg heev. Lub hardness yog me ntsis me dua xim av corundum thiab lub toughness yog me ntsis qis. Feem ntau siv los ua cov cuab yeej abrasive, tshwj xeeb ceramics thiab cov khoom siv refractory siab heev.

04 ibFused Brown Corundum
Fused xim av corundum yog tsim los ntawm high-alumina bauxite ua cov khoom tseem ceeb thiab tov nrog coke (anthracite), thiab smelted nyob rau hauv ib tug high-kub hluav taws xob rauv ntawm kub siab tshaj 2000 ° C. Fused xim av Corundum muaj cov tawv nqaij tuab thiab siab thiab feem ntau siv nyob rau hauv ceramics, prefractory cov ntaub ntawv.

05Sub-dawb Corundum
Subwhite corundum yog tsim los ntawm electromelting qib tshwj xeeb lossis thawj qib bauxite nyob rau hauv kev txo qis cua thiab tswj cov xwm txheej. Thaum melting, ntxiv txo tus neeg sawv cev (carbon), tus neeg sawv cev (hlau filings) thiab decarburizing tus neeg sawv cev (hlau nplai). Vim hais tias nws cov tshuaj muaj pes tsawg leeg thiab lub cev muaj zog nyob ze rau dawb corundum, nws hu ua sub-white corundum. Nws qhov ntom ntom yog siab dua 3.80g / cm3 thiab nws qhov porosity pom tsawg dua 4%. Nws yog cov khoom siv zoo tshaj plaws rau kev tsim cov khoom siv refractory siab heev thiab cov ntaub ntawv hnav-resistant.

06Chrome corundum
Nyob rau hauv lub hauv paus ntawm dawb corundum, 22% chromium yog ntxiv, thiab nws yog tsim los ntawm smelting nyob rau hauv ib tug hluav taws xob arc rauv. Cov xim yog xim liab-liab. Lub hardness yog me ntsis siab dua xim av corundum, zoo ib yam li dawb corundum, thiab lub microhardness yuav yog 2200-2300Kg / mm2. Lub toughness yog siab dua li ntawm dawb corundum thiab me ntsis qis dua cov xim av corundum.

07 ibZirconium Corundum
Zirconium corundum yog ib hom khoom tsim corundum ua los ntawm smelting alumina thiab zirconium oxide ntawm qhov kub thiab txias hauv qhov cub hluav taws xob, crystallizing, txias, crushing thiab tshuaj ntsuam. Lub ntsiab siv lead ua theem ntawm zirconium corundum yog α-Al2O3, theem nrab siv lead ua yog baddeleyite, thiab tseem muaj me me ntawm iav theem. Cov siv lead ua morphology thiab cov qauv ntawm zirconium corundum yog qhov tseem ceeb cuam tshuam rau nws qhov zoo. Zirconium Corundum muaj cov yam ntxwv ntawm lub siab tawv, muaj zog, muaj zog sib tsoo, ruaj khov tshuaj, thiab zoo thermal poob siab tsis kam. Nws yog dav siv nyob rau hauv abrasives thiab refractory ntaub ntawv industries. Raws li nws cov ntsiab lus zirconium oxide, nws tuaj yeem muab faib ua ob theem khoom: ZA25 thiab ZA40.