Magnesia calcium China carbon bricks muaj ntau yam zoo heev thiab siv tau zoo nyob rau hauv qhov hluav taws kub refining. Txawm li cas los xij, tseem muaj qee qhov teeb meem hauv kev siv cov hlau nplaum-calcium carbon cib. Nqe no peb yuav tham thawj qhov teeb meem txog qhov ntawd.
1. Cov tshuaj tiv thaiv kub ntawm magnesium oxide thiab tiv thaiv slag nkag
Tom qab qhov ntsuas kub nce mus txog 1500 degree, MgO hauv magnesium calcium carbon refractory matrix (Tuam Tshoj carbon bricks) yog ib qho yooj yim rau react nrog C hauv matrix raws li qhia hauv cov qauv hauv qab no, thaum kub txog 1600 degree, cov tshuaj tiv thaiv ua nruj, nyob rau hauv uas MgO txo mus rau Mg vapor, thiab C yog oxidized rau CO gas. Kev khiav tawm ntawm adobe, ua rau hnyav poob ntawm adobe, uas yog ib qho ntawm cov laj thawj tseem ceeb rau kev puas tsuaj ntawm Mg-C bricks.
MgO + C → Mg(g) plus CO(g)
Tsis tas li ntawd, thaum siv magnesia-calcium Tuam Tshoj carbon bricks, SiO2 nyob rau hauv lub slag thawj reacts nrog dawb CaO los ua C2S thiab C3S. Lawv tsim tuaj yeem ua rau kom cov viscosity ntawm cov slag, ua rau nws nyuaj rau cov slag ntxiv nkag mus rau hauv magnesium-calcium China carbon bricks. Txawm li cas los xij, cov graphite nyob rau saum npoo ntawm lub cib yog oxidized, ua rau decarburization ntawm txheej saum npoo los ua cov voids, yog li cov slag ntxiv nkag mus rau hauv cib, thiab MgO hauv magnesium-calcium xuab zeb reacts nrog CaO-SiO2 slag. los tsim MgO-CaO-SiO2 qis melting theem, yog li MgO yog magnesium. Qhov tsis muaj zog txuas ntawm calcium China carbon bricks kuj rau slag corrosion.
MgO yog qhov tsis muaj zog tshaj plaws nyob rau hauv magnesium-calcium-carbon refractories, yog li nws yog ib qho tsim nyog los txo cov ntsiab lus ntawm MgO hauv magnesium-calcium Tuam Tshoj carbon bricks, rau qee yam inhibit qhov hnyav poob qhov teeb meem tshwm sim los ntawm cov tshuaj tiv thaiv ntawm MgO nrog C ntawm siab. kub; thiab siv CaO los tsim cov theem txuas ntxiv ntawm magnesium-calcium xuab zeb, kom MgO tsis cuam tshuam ncaj qha nrog CaO-SiO2 slag.
Feem ntau, thaum fused magnesia-calcium xuab zeb raug xaiv los ua cov khoom siv raw ntawm magnesia-calcium, CaO nplej ntawm sintered magnesia-calcium xuab zeb tsim ib theem txuas ntxiv los qhwv MgO nplej, uas tuaj yeem tiv thaiv MgO. Thiab cov fused magnesia-calcium xuab zeb yog denser dua li sintered magnesia-calcium xuab zeb, uas kuj ntxiv dag zog rau slag nkag mus rau hauv lub magnesia-calcium Tuam Tshoj carbon bricks. Txawm li cas los xij, CaO nplej ntawm sintered magnesia-calcium xuab zeb yog them los ntawm MgO nplej, uas ua rau nws nyuaj rau CaO tiv tauj huab cua thiab yog li yuav tsum tau hydrated los ntawm cov dej vapor hauv huab cua, thaum lub fused magnesia-calcium xuab zeb tsuas yog muaj qhov tsis zoo. Kev yooj yim hydration ntawm CaO, thiab sintering Piv nrog fused magnesia-calcium xuab zeb, magnesia-calcium xuab zeb yog kev lag luam ntau dua. Yog li ntawd, kev xaiv ntawm ntau hom magnesia-calcium xuab zeb raw cov ntaub ntawv muaj nws tus kheej zoo thiab qhov tsis zoo.
