Magnesia carbon bricks yog tam sim no dav siv nyob rau hauv cov ntaub ntawv ntawm ntau yam hluav taws xob arc rauv, ladles thiab steelmaking refining furnaces (BOF, RH) nyob rau hauv niaj hnub hlau thiab hlau metallurgical kev lag luam. Magnesia carbon cib yog alkaline refractory khoom ua los ntawm magnesia thiab graphite ua raw khoom thiab siv ntau yam binders. Graphite yog ib qho tseem ceeb ntawm cov khoom siv magnesia-carbon refractory. Cov khoom zoo heev ntawm magnesia-carbon cib yog sib cais los ntawm qhov muaj graphite hauv magnesia-carbon cib. Yog li ntawd, qhov zoo ntawm graphite muaj kev cuam tshuam zoo rau kev ua haujlwm ntawm magnesia-carbon cib. Feem ntau tshwm sim hauv cov ntsiab lus hauv qab no:
1, cov nyhuv ntawm graphite purity. Kev yaig Performance index ntawm magnesia-carbon bricks txo qis heev raws li graphite purity nce thaum lub siab kub flexural zog Performance index ho nce, tshwj xeeb tshaj yog thaum lub purity ntau dua 95%. Yog li ntawd, purity ntawm graphite siv nyob rau hauv magnesia carbon bricks yog feem ntau ntau dua 95%.
2, Cov nyhuv ntawm cov hmoov tshauv. Si02, Al2O3, thiab lwm yam impurities kuj txo cov khoom refractoriness, thiab cov tshauv tseem yuav cuam tshuam rau lub cib lub peev xwm los tiv thaiv oxidation, yog li cov impurity cov ntsiab lus ntawm graphite yog tsim nyog. Kev yaig Performance index ntawm magnesia-carbon bricks nce ntau thaum Si02 cov ntsiab lus hauv graphite ntau dua 3%. qis dua yog qhov zoo dua.
3, Qhov cuam tshuam ntawm graphite tsis kam rau oxidation. Tus nqi ntawm decarburization yog dab tsi tiv thaiv cov khoom uas muaj carbon los ntawm corroding. Raws li qhov tshwm sim, cov khoom lag luam corrosion kuj tseem cuam tshuam los ntawm graphite's oxidation tsis kam. Qhov tshwj xeeb ntawm thaj chaw thiab oxidation tsis kam ntawm graphite nce nrog nws cov degree ntawm crystallization thiab txo nrog nws qhov chaw tshwj xeeb. Yog li ntawd, graphite raw cov ntaub ntawv nrog ua tiav crystallization thiab zoo graphitization feem ntau yog siv thaum tsim magnesia carbon cib.
4, Kev cuam tshuam ntawm graphite particle loj thiab cov duab. Piv nrog rau lub ntiaj teb graphite, flaky graphite tsis tsuas yog muaj siab purity, tab sis kuj muaj qhov tsis zoo crystallization. Yog li ntawd, cov khoom uas muaj carbon feem ntau siv flaky graphite, thiab qhov loj thiab nyias cov flakes, qhov zoo dua. Yog hais tias cov graphite particle loj me me dhau lawm, nws tseem yuav txo qhov kneadability, formability thiab oxidation tsis kam ntawm av nkos.
