1. Tabular alumina
Tabular alumina yog qhov siab -}} end refractory cov khoom uas tau pom kev loj hlob sai hauv kev lag luam refractory nyob rau xyoo tas los no. Nws tau nrov tshwj xeeb tshaj plaws nyob rau hauv high- Kev Ua Haujlwm Refractory, tshwj xeeb {{{{}}}} ovutru hlau channel Castables. Nws muaj ib nrab hloov cov tsoos dawb, sub - dawb, thiabXim av Aluminium OxideCov. Nyob rau hauv xyoo tsis ntev los no, raws li cov tuam txhab tau ua kom zoo dua qub cov txheej txheem, thiab txuas ntxiv cov nqi ntau lawm, thiab kev lag luam thiab kev lag luam zoo ntawm Alumina tau txhawb ntxiv. Sau - dawb thiab xim av fused alumina oxide nyob rau hauv refractory khoom siv kev ua lag luam, siv hauv cov ntawv thov tshwj xeeb, yuav tsum tau hloov mus ntxiv.
2. Cov Txheej Txheem Ntau Lawm
Cov txheej txheem ntau lawm rau cov hmoov av corundum yuav los ua cov pellets, kev sib tsoo, siab} kilination nyob rau hauv ib tug ntsug kilnin, crushing, tsoo, thiab ntim. Qhov txheej txheem kev xam pom no yog nqa tawm hauv qhov siab - kub ntsug Kiln roj tsuag los ntawm cov roj huv si. Lub recination yuav siv sij hawm nyob rau ntawm 1900-}} kawm, hloov pauv hloov ua ntu zus xws li} AL₂O₃ hauv kev lag luam alumina hmoov rau theem ruaj khov tshaj plaws. Siv cov txheej txheem recination thiab txias txheej txheem, cov qoob loo loj, cov qoob loo loj ntawm tabular corundum feem ntau yog li ntawm 30 mus rau 150μm.
Xim av fused alumina yog tsim los ntawm cov txheej txheem hluav taws xob hluav taws xob. Siab -} alumina bauxite clinker, carbon cov khoom siv, thiab ntxiv rau lub tshuab hluav taws xob ua kom sov. Tom qab high - kub yaj thiab txawv txav txias thiab crystallizes rau hauv lub xim av {}} brown fused mass. Cov pob zeb hauv av yog feem ntau - AL₂O₃ theem, nrog rau qhov chaw ntawm lub muaju qhia cov roj ua kom pom kev zoo. Lub periphery muaj cov txiaj ntsig tseem ceeb ntawm melt crystallization ntawm titanium oxide, thiab sib sau cov phiaj ntev, nrog coarsest nplej tswj cov pob txha platelele. Vim tias impurities tsis tau muab tshem tawm tag nrho, xim av aluminium oxide kuj muaj calcium hexaaluminate, spinel, thiab rute phaly parses, iam alloys, thiab cov kev daws teeb meem. Cov xim xim ntawm xim av fused alumina yog feem ntau nyob ntawm cov realual titanium oxide hauv cov khoom.
3. Kev siv cov yam ntxwv
Tabular corundum yog tsim los ntawm kev tua hluav taws sai thiab txias txheej txheem, ua rau muaj ntau ntawm cov micropores hauv cov nplej. Feem ntau ntawm cov hws no yog nanoscale hauv qhov loj me. Cov micropores no ua rau kub thiab tiv thaiv kev tshaj tawm tawg, muab cov tabanular corundum zoo tshaj thermal tsis kam.
Xim av Aluminium Oxide tau qhib ntau dua thiab cov ntawv kaw tsawg dua, thiab cov ntawv loj dua cov muaju thaum lub sijhawm qeeb qeeb. Nws cov ntsiab lus siab ntawm cov kev tsis sib haum ua rau cov intergranular loj dua. Cov chav uau nkaus no tuaj yeem tawg thaum tsoo, txo thermal poob siab tsis kam thiab spalling kuj.
Nws yog ib qho tseem ceeb tshaj plaws kom nco ntsoov tias pulverization thiab kev tawg ntawm xim av fused alumina kuj yog kev txhawj xeeb loj. Vim tias xim av txhuas oxide yog tsim los ntawm bauxite, uas muaj qib siab ntawm impurities xws li silicon, nws yuav tsum dreiliconization siv coke raws li tus neeg sawv cev txo. Yog tias qhov no tsis yog kho kom zoo thaum lub sijhawm smelting, muaj cov ntsiab lus carbide cov ntsiab lus tua tau zoo, uas yooj yim pulverize thaum raug dej. Xws li cov nplaim xim xim av alumina tuaj yeem ua rau tawg lossis txhaws thaum siv hauv cov khoom tiav. Tabliular Alumina, txawm li cas los xij, tsis tas yuav siv cov neeg sawv cev uas txo qis xws li Coke vim nws cov ntsiab lus los txawv tsis tu ncua. Yog li ntawd, cov khoom kawg muaj ntau dua 99.5% (w) al2o3, tshem tawm kev pheej hmoo ntawm kev tawg lossis hmoov.
4. Kev siv zog, kev tsim khoom huv, thiab muab khoom muaj peev xwm
Cov txheej txheem ntau lawm ntawm tabular alumina siv cov roj nkev kom huv. Vim tias kev ua qhov kub ua qis dua li ntawm Molten Alumina, nws yog ntau lub zog {{}}}} phooj ywg zoo dua li xim av txhuas oxide. Xim av fused alumina ntau lawm yog lub zog- ntshis, nrog lub zog siv ib tuj ntawm smelting tau dhau plaub zaug ntawm tabular alumina. Kev tsim cov xim av fused alumina tsim cov nyiaj tseem ceeb ntawm cov khoom pov tseg roj thiab kev swb. Tabular corundum ntau lawm siv cov nkev, uas tsis muaj leej faj. Tsuas yog nitrogen oxide emissions yuav tsum muaj nyob rau hauv kev tso pa, ua kom yooj yim rau kev tswj hwm. Tsis muaj lwm yam roj pov tseg lossis swb pov tseg.
Yog li ntawd, kev npaj ntawm tabular corundum yog ntau lub zog - txuag thiab ib puag ncig cov neeg siv roj av thiab cov neeg ncaj ncees ib puag ncig ib puag ncig.