Lub hauv paus tseem ceeb ntawm lub siab alumina cib hauv cov cua kub cua sov, AL2O3, yog zwitterionic oxide

Lub hauv paus tseem ceeb ntawm lub siab alumina cib hauv cov cua kub cua sov, AL2O3, yog zwitterionic oxide

Vim lub fact tias lub ntsiab tivthaiv ntawm siab alumina cib, AL2O3, yog ib tug zwitterionic oxide, nws muaj peev xwm tiv thaiv corrosion los ntawm acidic thiab alkaline slag, thiab kuj muaj tej yam kuj rau corrosion los ntawm oxidized hlau nplai. Yog li ntawd, nws yog feem ntau siv los tsim lub cub tawg hauv qab, sab phab ntsa ntawm lub cub tawg, thiab koov ntawm lub qhov hluav taws xob tso pa tawm ntawm lub qhov dej ntub dej. Ntawm cov cua kub sib law liag, cov pob zeb alumina siab tuaj yeem siv los tsim lub qhov cub hauv qab, lub tshuab hluav taws xob, lub qhov cub cib, thiab qab nthab. High alumina cib kuj tseem siv tau los ua cov phiajcim cib rau kev tsim cov thermal cia chambers.

High alumina bricks account rau li ntawm 8-14% ntawm tag nrho cov ntaub ntawv refractory nyob rau hauv advanced industrial teb chaws. Tuam Tshoj muaj ntau lub peev nyob rau hauv siab alumina bauxite, uas muab tej yam kev mob rau txoj kev loj hlob ntawm siab alumina bricks.

Silica cib

Silicon cib yog siliceous refractory khoom uas muaj tshaj 93% SiO2. Cov khoom siv raw yog quartzite, nrog cov mineralizers tsim nyog (FeO, CaO, thiab lwm yam) thiab cov binders (cov kua txiv qaub thiab cov kua txiv hmab txiv ntoo, thiab lwm yam) ntxiv, thiab raug rho tawm haujlwm ntawm 1350-1430 degree . Thaum lub sij hawm cua sov thiab tua hluav taws, SiO2 tau txais kev hloov pauv siv lead ua nrog kev hloov pauv. Hauv cov khoom raug rho tawm haujlwm zaum kawg, cov kev hloov pauv tseem ceeb yog hloov mus rau quartz siv lead ua thiab cristobalite crystals, nrog rau ob peb amorphous quartz iav. Cov kev hloov pauv hauv daim ntawv siv lead ua no xav tau cov ntxhia pob zeb thiab lub sijhawm ntev dua. Qhov tsawg dua qhov seem ntawm quartz, qhov zoo dua, raws li qhov seem quartz Qhov ntau quartz muaj, qhov tsis ruaj khov ntawm lub cib thaum siv. Qhov tseeb lub ntiajteb txawj nqus ntawm ntau hom siv lead ua quartz txawv. Los ntawm kev ntsuas qhov tseeb lub ntiajteb txawj nqus ntawm cov khoom tiav, nws muaj peev xwm txiav txim siab seb hom quartz siv lead ua puas tau hloov tag nrho. Qhov me me qhov tseeb qhov ceev, qhov kev hloov pauv ntau dua, thiab qhov zoo tshaj plaws-kub ntim ruaj khov yog ua tiav thaum siv. Yog li qhov ntsuas tau zoo ntawm silicon bricks tag nrho suav nrog qhov tseeb lub ntiajteb txawj nqus, thiab qhov tseeb qhov tseeb ntawm cov silicon cib yuav tsum qis dua 2.38-2.4.

Silicon bricks yog cov khoom siv acidic refractory, muaj zog tiv thaiv corrosion los ntawm acidic slag thiab tsis zoo rau alkaline slag. Txawm li cas los xij, lawv muaj qee yam tsis kam rau hlau oxide thiab calcium oxide, thiab tsis tiv taus corrosion los ntawm A1203 thiab alkali hlau oxides. Lub load softening kub ntawm silica bricks pib ntawm 1620-1660 degree, ze rau lawv cov hluav taws kub (1690-1730 degree ). Vim nws qhov tsis zoo crystalline network ntawm quartz nplai thiab siab viscosity nyob rau hauv cov kua theem. Qhov no yog ib qho ntawm qhov zoo tshaj plaws ntawm silicon bricks. Vim qhov no feature, lub load softening point yog siab dua li lwm cov feem ntau siv cib, thiab silicon bricks yuav siv tau los tsim lub arch ntawm high-temperature furnaces. Silicon bricks muaj kev ua haujlwm tsis zoo rau kev ua kom txias thiab cua sov, tsuas yog 1-2 dej txias mus txog 850 degree. Yog li ntawd, silicon bricks tsis haum rau siv nyob rau hauv lub zos thiab intermittent furnaces nrog drastic kub hloov. Tshwj xeeb tshaj yog qis dua 600 degree, vim muaj kev hloov pauv ntawm cov qauv siv lead ua sab hauv, lub ntim hloov pauv, uas cuam tshuam rau nws cov thermal stability. Yog tias qhov kub thiab txias hloov siab tshaj 600 degree, qhov cuam tshuam tsis tseem ceeb.

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