Thaum muasxim av aluminium oxiderau daim ntawv thov refractory, tsis txhob tsom rau tus nqi ib leeg. Peb yam tseem ceeb tshaj plaws: cov ntsiab lus alumina, qhov loj me ntawm cov khoom faib, thiab qib impurity. Tau txais txoj cai no yuav pab txo qis kev tawg ntawm cov cib refractory thiab tswj kom ntseeg tau lub tshuab ua kom sov lub neej kev pab cuam lub neej.
Dab tsi Alumina Cov ntsiab lus koj yuav tsum nrhiav?
Cov ntsiab lus alumina siab dua feem ntau txhais tau tias zoo dua siab -kub kev ua haujlwm. Brown aluminium oxide feem ntau muab faib ua tus nqi, thawj- qib, thiab qib thib ob- cov ntaub ntawv qib raws li cov ntsiab lus alumina. Hwm thiab thawj- cov ntaub ntawv qib yog feem ntau nyiam rau cov ntawv thov refractory, thaum thib ob - cov ntaub ntawv qib yog tsim nyog rau cov cheeb tsam uas xav tau tsawg dua.
| Qib | Alumina Cov ntsiab lus | Hlau thiab titanium impurities | Tej kev siv |
|---|---|---|---|
| Hwm | Tshaj 95% | Tsawg; Fe₂O₃ qis dua 0.35% | High-qib refractory cib, steel ladle castables |
| Thawj - qib | Tshaj 93.5% | Nruab nrab; Fe₂O₃ qis dua 0.5% | General -lub hom phiaj castables thiab refractory cib |
| Qib thib ob - qib | Tshaj 90% | Kwv tij siab | Cov khoom siv refractory dav dav thiab hnav-cov ntaub pua tsev |
Nco ntsoov ib daim duab tseem ceeb: rau siab - qhov kub thiab txias xws li steel ladles thiab blast furnaces, alumina cov ntsiab lus yuav tsum tsis txhob poob qis dua 95%. Txawm tias ob -feem pua - qhov sib txawv ntawm qhov sib txawv tuaj yeem cuam tshuam rau siab - qhov kub thiab txias thiab ua kom lub neej ntev ntawm cov khoom siv refractory.
Yuav Ua Li Cas Koj Yuav Xaiv Qhov Loj Loj Tshaj Tawm?
Brown aluminium oxide rau daim ntaub ntawv refractory feem ntau muab los ua cov nplej, nrog plaub tus qauv loj: 0-1 hli, 1-3 hli, 3-5 hli, thiab 5-8 hli. Coarse grains tsim cov qauv txheej txheem thiab muab lub zog, thaum cov nplej nplua nuj sau cov khoob ntawm cov khoom loj.
Tsis pom zoo siv ib qho loj me me xwb. Ib qho kev sib xyaw tsis zoo tuaj yeem tso cov porosity ntau dhau hauv cov pob zeb refractory thiab txo lawv lub zog. Ib txoj hauv kev zoo tshaj plaws yog sib xyaw cov ntxhib, nruab nrab, thiab cov nplej zoo raws li kev tsim, tom qab ntawd ntxiv cov hmoov zoo ntawm ib ncig ntawm 200 mesh los ua kom tiav cov voids seem thiab ua tiav qhov zoo - qib sib tov.
Yuav ua li cas thaum Impurity Levels siab dhau lawm?
Hlau thiab titanium yog ob qho tseem ceeb impurities los saib xyuas. Cov hlau ntau dhau tuaj yeem txhawb kev tsim cov qis- melting- cov theem ntawm qhov kub thiab txias, ua rau cov cib refractory soften thaum lub sijhawm ua haujlwm. titanium ntau dhau tuaj yeem ua rau muaj kev hloov pauv loj tom qab tua hluav taws, ua rau muaj kev pheej hmoo ntawm cov kab nrib pleb hauv qhov cub.
Nco ntsoov xyuas daim ntawv tshuaj ntsuam xyuas rau xim av aluminium oxide. Rau cov khoom zoo tshaj - qib, Fe₂O₃ cov ntsiab lus hauv qab 0.35% yog qhov siv tau. TiO₂ cov ntsiab lus feem ntau poob hauv thaj tsam ntawm 1.7%–3.4%.
Yog tias tus nqi siab tshaj qhov txwv tau teev tseg rau koj daim ntawv thov, tus nqi qis dua yuav tsis ua rau muaj kev pheej hmoo. Kev txuag ntawm cov khoom siv raw tuaj yeem yooj yim dua los ntawm tus nqi ntawm lub qhov cub tsis tau npaj tseg thiab kho.
Thaum xaiv xim av aluminium oxide rau daim ntawv thov refractory, xaiv cov khoom uas muaj tsawg kawg yog 95% alumina rau qhov siab - qhov kub thiab txias, muab cov qoob loo loj ntawm 0–1 mm txog 5–8 mm raws li cov qauv tsim nyog, thiab txheeb xyuas cov qib hlau thiab titanium hauv daim ntawv tshuaj ntsuam xyuas. Kev tshuaj xyuas peb yam no yuav pab txo qis kev pheej hmoo ntawm kev xaiv khoom thiab txhim kho kev ua haujlwm ntawm refractory.
