Dab tsi yog qhov zoo ntawm cov xim alumina siab uas tsis tuaj yeem ua tiav nrog av nplaum cib?
Al₂o₃ cov ntsiab lus ntau dua 48% ntawm txhuas silicate recicate religining raug xa mus rau as-alumina refractories. Nws cov khoom lag luam stereotypical uas yog feem ntau surge ntawm thermal kiln high alumina cib.
Raws li tus nqi ntawmAl₂o₃ Cov Ntsiab Lus, High Alumina Clock tuaj yeem muab faib ua peb qib:
Grade Ⅰ: Al₂O₃>75%.
Qib II: Al₂o₃60% ~ 75%;
Qib III: AL₂O₃48% ~ 60%.
Txwv raws liCov Khoom Siv Hauv Cov Ntxwg NyoogRaws li:
Tsis muaj mullite thiab mullite (al₂o₃48% ~ 71.8%)
Mullite-corundum thiab corundum-mullite (al₂o₃71.8% ~ 95%);
Corundum (al₂o₃95% ~ 100%).
Nyob rau hauv ntau ntau ntawm al₂o₃ tsawg dua 71.8%, Nrog rau kev nce ntawm Al₂o₃ cov ntsiab lus, lub ntsiab crystalline theem mullite nce hauv cov khoom lag luam loj;Nyob rau hauv ntau ntau ntawm al₂o₃ ntau tshaj 71.8%, Nrog rau kev nce ntawm Al₂o₃ cov ntsiab lus, tus naj npawb ntawm Mullite txo qis thiab tus naj npawb ntawm Corundum nce. Lub hom hluav taws xob refractory ntawm cov khoom tau nce nrog nce ntawm al₂o₃ cov ntsiab lus.
Siab alumina cib yog sintered cov khoom muaj al₂oo₃ 48% lossis ntau dua ntawm alumina lossis ntshiab alumina. Feem ntau, siab alumina cib muaj tsawg dua 80% al₂o₃, thiab cov uas muaj ntau dua 80% al₂o₃ hu ua Cornundum Cib.
Qhov zoo tshaj plaws kom zoo dua ntawm high alumina cib muab piv nrog cov av nplaum cib yog qhov siab dua thiab thauj khoom sov.
01.Fire Kuj
Kev ua kom ua tiav ntawm cov alumina siab hloov nyob rau hauv ntau qhov ntau, feem ntau i770 ~ feem ntau cuam tshuam los ntawm cov ntsiab lus ntawm al₂o₃ hauv cov khoom thiab txhim kho. Nyob rau tib lub sijhawm, kev ua kom tsis muaj kev cuam tshuam los ntawm cov ntsiab lus thiab hom impurities, uas cuam tshuam nrog theem pob zeb teeb meem ntawm cov khoom lag luam, saib cov lus 1.
02.Oload Softening kub
High Alumina Cib Tus lej thiab xwm ntawm cov iav theem muaj cov nyhuv tseem ceeb ntawm lub thauj khoom muag. 71.8% ~ 90% Cov ntsiab lus ntawm Mullite, Corundum, nrog qhov nce nyob rau hauv tus naj npawb ntawm mullite, tab sis mullite tab sis muaj qhov txo qis hauv lub load softening kub; Yog li ntawd, qhov muag muag kub ntawm lub nra tsis tseem ceeb. After Al₂O₃ content exceeds 90%, with the increase of Al₂O₃ content, the glass phase decreases, and the loading softening temperature increases significantly, from 1630 degree when Al₂O₃ 90% to 1900 degree when Alz03100%, the loading softening temperature increases with the increase of Al₂O₃ content. Cov kev sib raug zoo ntawm Al₂o₃ cov ntsiab lus thiab chaw thau khoom siv soften kub yog qhia hauv Daim Duab 1.
03. Thermal conductivity
Cov khoom lag luam loj alumina muaj ntau dua thermal conductivity tshaj cov khoom av nplaum. Qhov laj thawj rau qhov no yog tias muaj tsawg dua cov khoom siv thermal heev, thaum tus nqi ntawm cov thermal zoo nce, txhim kho cov thermal conductivity ntawm cov khoom. Thermal ua haujlwm tsawg dua nrog kev nce qib.
Lub thermal conductivity ntawm high alumina cib yog txawv ntawm cov av nplaum thiab silica cib. Lub thermal conductivity ntawm high alumina cib txo qis nrog kev nce qib. Thaum cov siab dua cov ntsiab lus zoo siab hauv lub siab Alumina cib, ntau dua mullite thiab corundum muaj, ntau pom tseeb qhov kev nyiam ua kom tsawg dua nrog qhov kub kom tsawg. Txawm li cas los xij, siab dua 1000 degree, nws cov tsawg zuj zus. Thaum lub thermal conductivity ntawm av nplaum thiab silica cib nce ntxiv nrog kev nce qib thiab seem tsis hloov ze li 1000 degree. Ntawm chav tsev kub, siab alumina cib ntau dua li av ci cib thermal condality 2 ~ 3 zaug, tab sis siab dua nws thermal conductivity yog ib qho zoo sib xws.
Cov ntau yam ntawm siab alumina cib nrog cov ntsiab lus qis al₂o₃ yog qhov zoo sib xws rau cov av nplaum cib hauv cov laj fai ntawm load softing point thiab thermal poob siab kuj. Txawm li cas los xij, raws li cov ntsiab lus al₂o₃ nce, lub thauj khoom muag taw tes thiab thermal poob siab kuj nce zuj zus. Cov yam ntxwv ntawm Alumina High ua rau lawv muaj kev kub siab hom av nplaum, yog li lawv tuaj yeem siv rau hauv cov iav kub melting kilns. Ntau yam nrog porosity tsawg yuav siv tau nyob rau hauv cov cua sov cia chav, xws li sab saum toj ntawm chav tsev swan thiab phab ntsa sab saud. Cov yam ntxwv tseem ceeb ntawm cov xim loj alumina muaj nyob hauv Table 2.
Raws li txoj kev ntau lawm, muaj ob yam ntawm Corundum cib: Sintered thiab Electrofusion Casting. Sintered corundum cib refractoriness nce mus txog 2000 degree, tab sis nws cov ntaub ntawv cua sov ntawm tib lub mullite cov ntaub ntawv refractory, piv nrog nws cov tsis muaj kev txom nyem thermal tsis kam.
Zinfon Refractory Technology Co., Ltd
Peb yog cov khoom siv hluav taws xob refractory ua ke R & D, kev tsim khoom, kev tsim kho, cov ntaub ntawv ua lag luam thiab kev lag luam.
Peb tab tom muab ntau cov hlau nplaum thiab alumina rectractories nrog rau ob qho khoom siv thiab cov khoom tsis yooj yim, cov khoom siv raw thiab cov khoom siv tshuaj lom neeg.
Peb muaj ntawv pov thawj rau ISO9001, ISO14001, ISO45001 thiab lwm lub tebchaws thiab hauv zos pov thawj raws li nram no: