Cov kav dej alumina ceramic uas tiv taus hnav-resistantyog ib qho khoom siv tiv thaiv tseem ceeb uas siv dav hauv cov kav dej kev lag luam uas raug kev puas tsuaj loj heev. Lawv cov khoom xyaw tseem ceeb yog alpha-alumina (Al₂O₃), nrog rau cov ntsiab lus feem ntau yog txij li 92% txog 99.5%. Cov khoom siv no yog tsim los ntawm cov txheej txheem sintering kub siab, ua rau muaj qhov nyuaj tshwj xeeb, nrog Rockwell hardness (HRA) ntawm ≥85 thiab Mohs hardness rating ntawm 9, thib ob tsuas yog pob zeb diamond. Cov raj liner no tau sib txuas ruaj ntseg lossis mechanically embedded rau ntawm phab ntsa sab hauv ntawm cov kav hlau, tsim ib qho kev tiv thaiv zoo uas cais cov dej ntws los ntawm kev txhuam ncaj qha thiab hnav ntawm lub cev yeeb nkab hlau.
Lawv cov kev ua tau zoo tshaj plaws yog los ntawm cov khoom siv ntawm alumina ceramics. Ntxiv rau qhov muaj zog heev, lawv qhov ceev feem ntau yog >3.6 g/cm³, nrog rau lub zog compressive tshaj 850 MPa. Qhov kev tiv thaiv kev hnav ntawm cov ceramic liners no yog kwv yees li 266 npaug ntawm cov hlau manganese thiab 171.5 npaug ntawm cov hlau cam khwb cia siab chromium, ntev lub neej ua haujlwm ntawm cov khoom siv los ntawm 5 txog 10 npaug hauv qab cov xwm txheej ua haujlwm sib piv. Lawv qhov chaw du thiab cov coefficient qis ntawm kev sib txhuam zoo txo qhov kev tiv thaiv kev xa khoom. Lawv kuj muaj kev tiv thaiv corrosion zoo heev, tiv taus feem ntau cov tshuaj lom neeg tshwj tsis yog hydrofluoric acid thiab cov alkalis kub concentrated.
Cov khoom no feem ntau yog siv rau hauv cov lag luam uas muaj kev thov kom tsis txhob hnav. Cov ntawv thov feem ntau suav nrog kev xa cov thee, kev pub roj pulverized, thiab cov tshuab tshem tawm tshauv hauv cov chaw tsim hluav taws xob thermal; cov kav dej thauj cov thee thiab hmoov ore pulverized hauv cov chaw tsim hlau; cov hmoov nplej nyoos, clinker, thiab cov kab hloov hmoov thee hauv cov chaw tsim cement; thiab cov tshuab thauj cov tailings thiab concentrate slurry hauv kev ua haujlwm mining. Nws kuj tseem siv dav hauv cov kav dej thauj pneumatic thiab hydraulic hauv cov hlau, tshuaj lom neeg, thiab lwm yam lag luam, daws tau cov teeb meem ntawm kev hnav sai sai ntawm cov kav dej, perforation, thiab xau los ntawm kev siv cov khoom siv mus sij hawm ntev.
Hauv kev xaus, cov kav dej alumina ceramic liner uas tiv taus kev hnav muab kev tiv thaiv mus sij hawm ntev rau cov kav dej xa khoom lag luam los ntawm lawv qhov kev tawv heev, kev hnav zoo heev, thiab kev tiv taus corrosion. Lawv txo qhov zaus ntawm kev kaw rau kev saib xyuas thiab hloov cov nqi uas tshwm sim los ntawm kev hnav cov kav dej, txhim kho kev ua haujlwm zoo thiab kev nyab xeeb ntawm cov kab ke tsim khoom. Lawv sawv cev rau kev daws teeb meem tiv thaiv uas tau ua pov thawj thiab pheej yig.
Lub sijhawm tshaj tawm: Lub Kaum Ob Hlis-24-2025