Refractory Qib Tuag Burned Magnesite
Refractory Qib Tuag Burned Magnesite: Cov Khoom Siv Tseem Ceeb rau Kev Siv Kub Kub
Refractory qib tuag hlawv magnesite (DBM)yog ib hom magnesite uas tau raug calcined ntawm qhov kub thiab txias, feem ntau siab tshaj 1600 degree, uas ua rau ib tug heev ntshiab thiab ruaj khov khoom nrog zoo heev refractory zog. DBM yog dav siv nyob rau hauv ntau yam high-kub daim ntaub ntawv, tshwj xeeb tshaj yog nyob rau hauv zus tau tej cov refractory bricks thiab linings rau steel- thiab cement-ua rauv, nrog rau kev tsim khoom ntawm lwm yam ntaub ntawv refractory rau industrial lub hom phiaj.
DBM muaj ib tug xov tooj ntawm cov khoom zoo uas ua rau nws zoo tagnrho rau siv nyob rau hauv high-temperature ib puag ncig. Ua ntej, nws muaj qhov siab melting point ntawm ib ncig ntawm 2800 degree, uas txhais tau hais tias nws tuaj yeem tiv taus qhov kub thiab txias yam tsis muaj melting lossis degrading. Qhov thib ob, nws muaj cov thermal expansion coefficient uas tsis tshua muaj thermal expansion coefficient, uas ua rau nws tiv taus thermal shock - qhov kub thiab txias tam sim ntawd tuaj yeem ua rau lwm yam khoom tawg lossis tawg. Thib peb,DBMmuaj tshuaj lom neeg ruaj khov zoo heev, nrog rau qhov tsis tshua muaj tshwm sim ntawm acidic thiab cov ntaub ntawv yooj yim. Qhov no ua rau nws muaj txiaj ntsig tshwj xeeb hauv kev siv tshuaj lom neeg thiab petrochemical, qhov twg nws yuav raug rau cov tshuaj corrosive heev.
Cov txheej txheem tsim khoom rau DBM yog qhov yooj yim. Magnesite ore, uas yog cov ntxhia tshwm sim los ntawm magnesium carbonate (MgCO3), yog thawj zaug crushed thiab hauv av rau hauv cov hmoov zoo. Cov hmoov no yog tom qab ntawd calcined ntawm qhov kub thiab txias hauv lub cub tawg, uas ua rau cov magnesium carbonate decomposition rau magnesium oxide (MgO) thiab carbon dioxide (CO2). Cov khoom muag tau tshwm sim yog cov khoom siv ntshiab thiab tuab cov ntaub ntawv uas yog tus uas muaj peev xwm ua ntej, nrog me me lossis tsis muaj impurities.
Muaj ob lub ntsiab ntawm DBM: fused thiab sintered. Fused DBM yog tsim los ntawm melting raw magnesite hmoov nyob rau hauv ib tug hluav taws xob arc rauv, uas ua rau ib tug glassy, ntom khoom uas muaj zoo heev kuj rau slag thiab lwm yam corrosive cov ntaub ntawv. Sintered DBM, ntawm qhov tod tes, yog tsim los ntawm kev cog cov hmoov nyoos rau hauv ib lub cib lossis thaiv cov duab thiab tua nws ntawm qhov kub thiab txias hauv qhov cub. Sintered DBM feem ntau tsis tshua ntom thiab muaj cov thermal conductivity qis dua fused DBM, tab sis nws yog tus nqi ntau dua thiab yooj yim dua los tsim cov khoom loj.
DBMyog ib yam khoom muaj txiaj ntsig rau ntau yam kev siv kub-kub, thiab nws txoj kev siv yuav nce ntxiv rau xyoo tom ntej raws li qhov kev thov rau cov khoom siv refractory muaj txiaj ntsig zoo txuas ntxiv mus. Nrog nws cov khoom zoo heev refractory, superior tshuaj stability, thiab yooj yim ntawm ntau lawm, DBM yog ib tug txhim khu kev qha thiab nqi-zoo tshuaj rau ntau yam kev lag luam thiab kev lag luam daim ntaub ntawv.
