Magnesia chrome cib yog cov khoom siv refractory nrog magnesium oxide (MgO) thiab chromium trioxide (Cr2O3) ua cov khoom tseem ceeb, thiab periclase thiab spinel ua cov khoom tseem ceeb hauv cov ntxhia.
Hom cib no muaj kev ua haujlwm siab refractory, siab kub lub zog, muaj zog tiv thaiv alkaline slag yaig, zoo thermal stability, thiab qee qhov kev hloov mus rau acidic slag. Cov ntaub ntawv tseem ceeb rau kev tsim magnesia chrome cib yog sintered magnesia thiab chromite. Lub purity ntawm magnesia raw cov ntaub ntawv yuav tsum siab npaum li sai tau. Cov tshuaj muaj pes tsawg leeg ntawm chromite yog: Cr2O3: 30 ~ 45%, CaO: Tsawg dua lossis sib npaug li 1.0 ~ 1.5%.
Txheej txheem ntau lawm
Cov nyhuv loosening tshwm sim los ntawm kev nthuav dav ntawm cov hlau oxides thaum lawv hnov mob rau daim ntawv spinel kuj tuaj yeem tsim los ntawm cov khoom siv hluavtaws co-sintered los ua magnesia-chromium cib. Tsis tas li ntawd, muaj cov pob zeb uas tsis tau hlawv magnesia chromium, xws li cov pob zeb uas tsis muaj magnesia chromium ua ke nrog inorganic magnesium ntsev tov. Kev tsim cov txheej txheem ntawm cov hlau nplaum uas tsis muaj hluav taws xob yog qhov yooj yim, tus nqi qis thiab zoo thermal stability, tab sis nws lub zog kub kub yog tsawg dua li ntawm cov cib raug rho tawm haujlwm. Lub npe hu ua "direct bond" magnesia-chromium cib tau tsim ua ntej. Cov yam ntxwv ntawm cov cib no yog cov khoom siv ntshiab huv, kev kub hnyiab kub, kev sib txuas ncaj qha ntawm cov theem kub xws li periclase thiab spinel, thiab cov kob zoo li kev faib tawm ntawm cov theem qis qis xws li silicate. Yog li ntawd, qhov kub-kub kuj ntawm lub cib yog ho txhim kho. Lub zog thiab slag kuj.
Txoj kev ua cib los ntawm kev sib txuas cov hmoov zoo uas tsim los ntawm calcining chrome ore-magnesia co-sib tsoo compact thiab ntxhib hais ntawm magnesia yog ib qho kev ntsuas zoo los tshem tawm cov nyhuv loosening. Piv nrog cov magnesia-chrome cib zoo tib yam, cov magnesia-chrome cib ua los ntawm cov qauv no muaj qis porosity, siab zog compressive, load softening kub thiab flexural zog. Magnesia-chrome cib ua los ntawm chrome ore-magnesite hmoov compacts thiab hluavtaws magnesia-chromium xuab zeb calcined ntawm qhov kub thiab txias muaj qhov zoo dua slag tsis kam thiab siab kub zog dua li lwm yam magnesia-chrome cib.
Tsis tas li ntawd, muaj cov fused magnesia-chromium cib uas ncaj qha nrum los ntawm fused magnesia-chromium cov ntaub ntawv nyob rau hauv ib tug hluav taws xob arc rauv, thiab magnesia-chromium bricks uas yog ua ke nrog molten hais ua los ntawm lub cib ua txheej txheem siv fused magnesia-chromium cov ntaub ntawv. .
Cov chaw thov
Magnesia-chromium bricks yog siv nyob rau hauv metallurgical kev lag luam, xws li lub tsev qhib lub qhov cub rauv saum, hluav taws xob rauv saum, sab nraud refining furnaces thiab ntau yam uas tsis yog-ferrous hlau smelting furnaces. Qhov kub-kub ntawm lub qhov cub hluav taws xob ultra-high-power fais fab phab ntsa yog ua los ntawm fused magnesia-chromium cib, qhov siab-erosion cheeb tsam ntawm refining rauv sab nraum lub cub tawg yog ua los ntawm magnesia-chromium cib ua los ntawm cov khoom siv hluavtaws, thiab cov high-erosion cheeb tsam ntawm non-ferrous hlau flash smelting rauv yog ua los ntawm fused-cam khwb cia magnesia-chromium cib thiab cov khoom siv hluavtaws. Ua los ntawm magnesia chrome cib. Tsis tas li ntawd, magnesia-chrome cib kuj tau siv nyob rau hauv qhov chaw tua hluav taws ntawm cov cement rotary kilns thiab lub regenerator ntawm iav kilns.
