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Advanced lightweight periclase-magnesium aluminate spinel refractories with high mechanical properties and high corrosion resistance

机译：先进的轻质Periclase-镁铝酸盐尖晶石耐火材料，具有高机械性能和高耐腐蚀性

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A new strategy to improve the mechanical strength and the cement clinker corrosion resistance of refractories for cement kiln was proposed in this work. For this purpose, advanced lightweight periclase-magnesium aluminate spinel refractories (LPSR) with high mechanical properties and excellent cement clinker resistance were fabricated using microporous magnesia aggregates. Their microstructures and properties were then compared to conventional dense periclase-magnesium aluminate spinel refractories (DPSR) containing sintered magnesia aggregates. The apparent porosities of the microporous and dense magnesia aggregates were 43.1% and 5%, respectively. Scanning electron microscopy observation results showed that the interface between the microporous aggregates and the matrix was better, which significantly improved the strength and thermal shock resistance of the LPSR. Additionally, the microporous magnesia aggregates absorbed some of the penetrating slag from the matrix, which prevented further infiltration. Thus, after substituting the microporous magnesia aggregates for dense magnesia aggregates to fabricate LPSR, the practically same cement clinker resistance was obtained for the LPSR compared to DPSR. Meanwhile, the bulk density was decreased from 2.87 g/cm(3) to 2.61 g/cm(3), while the compressive strength and flexural strength increased from 48.7 MPa to 73.1 MPa and 6.0 MPa to 10.1 MPa, respectively. Meanwhile, practically the same cement clinker resistance was obtained for the LPSR compared to DPSR. (C) 2021 Elsevier Ltd. All rights reserved.
机译：在这项工作中提出了一种提高水泥窑耐火材料的机械强度和水泥熟料耐腐蚀的新策略。为此目的，使用微孔氧化镁聚集体制造具有高机械性能和优异的水泥熟料耐受高机械性能和优异的水泥熟料电阻的先进轻质蠕动术镁镁镁耐火料（LPSR）。然后将它们的微观结构和性质与含有烧结氧化镁聚集体的常规致密髓质 - 镁铝酸镁耐火材料（DPSR）进行比较。微孔和致密氧化镁聚集体的表观孔隙分别为43.1％和5％。扫描电子显微镜观察结果表明，微孔聚集体和基质之间的界面更好，这显着提高了LPSR的强度和热抗冲击性。另外，微孔氧化镁聚集体吸收了来自基质的一些穿透渣，其防止进一步渗透。因此，在用致密氧化镁聚集物代替微孔氧化镁聚集体以制造LPSR后，与DPSR相比，将实际相同的水泥熟料抗性获得LPSR。同时，堆积密度从2.87g / cm（3）减少到2.61g / cm（3），而抗压强度和抗弯强度分别从48.7MPa增加到73.1MPa和6.0MPa至10.1MPa。同时，与DPSR相比，实际上获得了LPSR的实际上相同的水泥熟料抗性。 （c）2021 elestvier有限公司保留所有权利。

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