Lub magnesium hmoov thim rov qab yog tsim los ntawm kev siv cov tshuaj magnesiite ore thiab calcined los ntawm cov kub siab ncej kiln. Nws yog ib qho khoom siv rau cov cib ua thiab ntau lawm ntawm amorphous refractories. Cov khoom tiav yog siv nyob rau hauv cov steel txiav, hluav taws xob rau hauv qab thiab cov ntaub.
Lub calcined magnesium hmoov yog tsuas yog xaiv los ntawm magnesite ore nrog ib cov ntsiab lus ntawm ntau tshaj li 46%. Thaum cov ntxhiab pob zeb magnesite kub txog 1400-1800 ° C los ntawm qhov kub siab ncej kiln, Mg (CO3) yog txhij txhua daim periclase, uas yog ib qho xim liab xim liab. Magnesium, uas muaj qib siab ntawm refractoriness. Nws yog ib qho khoom noj khoom haus zoo tagnrho rau kev siv ntawm amorphous refractories. Cov khoom siv yog siv rau hauv steelmaking qhib hearth furnaces, hluav taws xob rau hauv qab thiab hluav taws xob.
Kev ua haujlwm ntawm cov kav dej phwj hauv magnesium oxide yog tias cov magnesium oxide hmoov reacts nrog cov kav dej los ua magnesium hydroxide. Cov hmoov magnesium oxide reacts nrog cov dej phwj tuaj ua magnesium hydroxide ua ntej, thiab magnesium oxide reacts nrog cov kav dej. Nyob rau tib lub sij hawm ntawm magnesium hydroxide, qhov teeb meem impurities nyob rau hauv cov dej phwj tuaj txauv thiab kho. Kev siv magnesium hydroxide tuaj yeem siv los ua tus neeg sawv cev ua kom tsis muaj zog, magnesium hydroxide yog alkaline, cov adsorption kev ua haujlwm zoo, thiab nws tuaj yeem siv ua cov roj khib nyiab, kev kho nkev, Kev kho tsis muaj cov hlau uas muaj roj thiab cov organic kua qaub tau lug siv nyob rau hauv cov dej kho systems hauv xyoo tas los.
Thaum magnesiite yog calcined thaum 1800 ° C, carbon dioxide tag escapes, magnesium oxide cov ntaub ntawv thaiv ntom ntawm periclase, thiab weighed magnesium (tseem hu ua sintered magnesium hmoov), uas muaj siab ntawm refractoriness. Nws lub ntsiab tivthaiv yog magnesia, uas yog xaiv los ntawm ntuj super magnesite ore los ntawm cov hluav taws xob tuaj, lub teeb kub, kev nplua zoo, siab siab pob pressing thiab ultra-siab kub roj ncej roj sib tsoo.