Kev teeb tsa 5% txog 10% (feem pua ntawm pawg) Al2O3 hauv qhov matrix ntawm lub cub tawg carbon / graphite cib (carbon blocks) txhim kho qhov kev tiv thaiv corrosion ntawm cov hlau molten thiab yog daim ntawv thov ntawm cov cib carbon txhuas hauv cov txheej txheem ironmaking. Qhov thib ob, cov cib carbon txhuas kuj tseem siv rau hauv cov hlau molten pretreatment thiab cov kais dej.
Cov cib carbon aluminium rau kev kho hlau ua ntej
Cov cib txhuas silicon carbide feem ntau yog siv rau hauv cov khoom siv rau kev thauj cov hlau molten xws li cov thoob hlau molten. Txawm li cas los xij, thaum hom khoom siv refractory no siv rau hauv cov thoob hlau molten loj thiab cov khoom sib tov hlau, thiab ntsib cov xwm txheej kub thiab txias hnyav, nws yooj yim tawg, ua rau cov qauv tev tawm. Tsis tas li ntawd, vim tias cov cib Al2O3-SiC-C siv rau hauv cov thoob hlau kub loj thiab cov khoom sib tov hlau feem ntau muaj cov ntsiab lus carbon ntawm 15% thiab cov thermal conductivity siab txog 17 ~ 21W / (m · K) (800 ℃), muaj kev txo qis Qhov kub ntawm cov hlau molten thiab teeb meem ntawm kev hloov pauv cov ntawv hlau ntawm cov thoob hlau molten loj thiab cov tsheb sib tov. Kev tiv thaiv yog kom ua tiav cov thermal conductivity qis los ntawm kev tshem tawm SiC, ib qho khoom siv thermally conductive, thaum txo cov ntsiab lus graphite thiab refining graphite.
Los ntawm kev tshawb fawb yooj yim, nws xaus lus tias:
(1) Thaum cov ntsiab lus graphite (feem pua ntawm pawg) hauv cov cib carbon txhuas tsawg dua 10%, nws cov qauv kev teeb tsa muaj Al2O3 tsim cov matrix txuas ntxiv, thiab cov pa roj carbon tau sau rau hauv cov matrix hauv daim ntawv ntawm cov ntsiab lus hnub qub. Lub sijhawm no, qhov kev ua tau zoo thermal λ ntawm cov cib carbon txhuas tuaj yeem kwv yees li ntawm cov mis (1)
Hauv cov mis, λa yog qhov thermal conductivity ntawm Al2O3; Vc yog qhov ntim ntawm graphite. Qhov no qhia tau hais tias qhov thermal conductivity ntawm cov cib txhuas carbon tsis muaj dab tsi ua rau qhov thermal conductivity ntawm graphite.
(2) Thaum cov graphite raug ua kom zoo, qhov thermal conductivity ntawm cov cib carbon txhuas muaj tsawg dua kev vam khom rau cov khoom graphite.
(3) Rau cov cib txhuas-carbon uas tsis muaj carbon ntau, thaum cov graphite raug ua kom zoo, cov matrix sib txuas ntom ntom tuaj yeem tsim tau, uas tuaj yeem txhim kho qhov kev tiv thaiv corrosion ntawm cov cib txhuas-carbon.
Qhov no qhia tau hais tias cov cib ua los ntawm cov pa roj carbon tsawg A tuaj yeem hloov kho rau cov xwm txheej ua haujlwm ntawm cov thawv hlau kub loj thiab cov tsheb sib xyaw hlau hauv lub tshuab ua hlau.
Lub sijhawm tshaj tawm: Lub Ob Hlis-27-2024
