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Influence of different magnesia-calcia clinkers on slag resistance of MgO-CaO-C brick
Author(s): 
Pages: 35-38
Year: Issue:  1
Journal: Refractories

Keyword:  镁钙砂抗渣性致密度CaO分布;
Abstract: 分别以30%(w)的烧结镁钙砂A、烧结镁钙砂B、电熔镁钙砂3种镁钙砂原料与62%(w)的电熔镁砂、8%(w)的鳞片石墨制备了3种CaO质量分数均为6%的MgO-CaO-C砖.利用回转抗渣法对比了3种MgO-CaO-C砖抗CaO-SiO2渣的侵蚀性能,并对残砖进行了SEM分析.结果表明:(1)Mgo-CaO-C砖抗CaO-SiO2渣侵蚀的能力与镁钙砂的致密度成正比,电熔镁钙砂抗渣侵蚀性能及挂渣性能皆优于烧结镁钙砂.(2)镁钙砂的CaO的分布影响Mgo-CaO-C砖的抗渣性能:电熔镁钙砂的CaO形成连续相而将MgO与渣隔离开来,更有利于抗CaO-SiO2渣侵蚀;烧结镁钙砂的CaO分布不均匀,会导致Mgo-CaO砂的不均匀熔损,进而加速渣对其侵蚀.
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