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

Titelangaben

Peng, Wangding ; Chen, Zhe ; Yan, Wen ; Schafföner, Stefan ; Li, Guangqiang ; Li, Yawei ; Jia, Cangjian:
Advanced lightweight periclase-magnesium aluminate spinel refractories with high mechanical properties and high corrosion resistance.
In: Construction and Building Materials. Bd. 291 (2021) . - 123388.
ISSN 1879-0526
DOI: https://doi.org/10.1016/j.conbuildmat.2021.123388

Abstract

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/cm3 to 2.61 g/cm3, 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.

Weitere Angaben

Publikationsform: Artikel in einer Zeitschrift
Begutachteter Beitrag: Ja
Keywords: Lightweight periclase-magnesium aluminate spinel refractories; Microporous magnesia aggregates; Microstructure; Mechanical properties; Cement clinker resistance
Institutionen der Universität: Fakultäten
Fakultäten > Fakultät für Ingenieurwissenschaften
Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Keramische Werkstoffe
Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Keramische Werkstoffe > Lehrstuhl Keramische Werkstoffe - Univ.-Prof. Dr.-Ing. Stefan Schafföner
Titel an der UBT entstanden: Nein
Themengebiete aus DDC: 600 Technik, Medizin, angewandte Wissenschaften
600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften
Eingestellt am: 31 Mär 2023 09:45
Letzte Änderung: 31 Mär 2023 09:45
URI: https://eref.uni-bayreuth.de/id/eprint/75755