Influence of Microstructure on Formation of Deterioration Layer in Periclase-Hercynite Bricks

Influence of Microstructure on Formation of Deterioration Layer in Periclase-Hercynite Bricks The microstructure of the original layer and the cement melt-penetrated layer of a used periclase-hercynite brick from a cement rotary kiln with a daily output of 5000 tons for 12 months was studied by XRD, SEM, EDS, and a mercury porosimeter. The results show that the cation diffusion between hercynite and periclase particles in the brick at high temperatures decreases the pore size of the brick. The pore size in the original layer is located mainly in the range of 4 – 20 μm; the decreased pore size increases the penetration resistance of the cement melt to the inside of the brick and makes the cement melt react with the pore walls better. The components of the matrix pore walls such as MgO and Al2O3 dissolve in the cement melt, enhancing the hot properties of the penetrated melt, decreasing the penetration depth, and slowing the formation of the deterioration layer. The pore structure and the element distribution endow the brick with good thermal shock resistance. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Refractories and Industrial Ceramics Springer Journals

Influence of Microstructure on Formation of Deterioration Layer in Periclase-Hercynite Bricks

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Publisher
Springer US
Copyright
Copyright © 2016 by Springer Science+Business Media New York
Subject
Material Science; Characterization and Evaluation of Materials; Materials Science, general; Ceramics, Glass, Composites, Natural Methods
ISSN
1083-4877
eISSN
1573-9139
D.O.I.
10.1007/s11148-016-9966-x
Publisher site
See Article on Publisher Site

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