Features of the Fracture of Refractory Linings Depending on the Equipment Size

Using computer simulation, we studied the influence of the size factor on cracking in refractory linings by the example of steel-pouring ladles used in ferrous metallurgy. The stress-strain state of such linings was analyzed on the macroscopic scale without taking into account their discrete structu...

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Bibliographic Details
Published in:Refractories and industrial ceramics 2023-03, Vol.63 (6), p.585-592
Main Authors: Grigoriev, A. S., Danilchenko, S. V., Zabolotsky, A. V., Migashkin, A. O., Turchin, M. Yu, Khadyev, V. T.
Format: Article
Language:English
Subjects:
Ceramics
Characterization and Evaluation of Materials
Chemistry and Materials Science
Composites
Computer simulation
Concentrators
Cracking (fracturing)
Glass
Ladle metallurgy
Ladles
Linings
Materials Science
Metal industry
Natural Materials
Refractories industry
Refractory materials
Simulation methods
Stress distribution
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Summary:Using computer simulation, we studied the influence of the size factor on cracking in refractory linings by the example of steel-pouring ladles used in ferrous metallurgy. The stress-strain state of such linings was analyzed on the macroscopic scale without taking into account their discrete structure (individual bricks) and the microstructure of the refractory material. We revealed that the maximum thermally- and mechanically-induced stresses in the linings are confined to certain regions associated with the design features of the equipment. Due to the distribution of mechanical loads and heat transfer features, these regions act as macroscopic stress concentrators. However, for small-size equipment, these maxima are not sufficiently pronounced, and the stress fields formed by different stress concentrators overlap. Apparently, this is the reason for the relatively chaotic arrangement of cracks in ladle linings. In large-size equipment, the stress fields of “construction-conditioned” concentrators do not overlap due to the large distance between them. The stresses in these concentrators exceed the background values in the surrounding regions of the lining by an order of magnitude or more. This determines the high probability of a characteristic fracture pattern with cracking in the vicinity of “construction-conditioned” stress concentrators.
ISSN:1083-4877
1573-9139
DOI:10.1007/s11148-023-00773-6