Expansion/Shrinkage of Hearth Mixes During Firing

The urgency of the problem of shrinkage phenomena during hearth firing, contributing to joint opening and crack formation, is demonstrated. Contemporary methods and means of studying expansion/shrinkage of hearth mixes during firing are analyzed. Expansion/shrinkage of hearth mixes, differing in the...

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Bibliographic Details
Published in:Refractories and industrial ceramics 2020-07, Vol.61 (2), p.188-191
Main Author: Apal’kova, G. D.
Format: Article
Language:English
Subjects:
Anthracite
Ceramics
Characterization and Evaluation of Materials
Chemistry and Materials Science
Composites
Firing
Glass
Graphite
Materials Science
Mixtures
Natural Materials
Optimization
Shrinkage
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Summary:The urgency of the problem of shrinkage phenomena during hearth firing, contributing to joint opening and crack formation, is demonstrated. Contemporary methods and means of studying expansion/shrinkage of hearth mixes during firing are analyzed. Expansion/shrinkage of hearth mixes, differing in the ratio of the carbon component (anthracite) and artificial graphite within their composition, is investigated. It is established that shrinkage phenomena decrease in a series from anthracite to graphite-anthracite. Studies show that the difference in the scale of linear changes during structural shrinkage is quite significant, i.e., about 20%. It is noted that minimization of shrinkage phenomena contributing to opening of joints and crack formation is one of the factors for reducing the risk of leakage at the bottom of a cell. In this connection it is advisable to optimize the shrinkage rate of hearth mixes during firing in the stage of structural adjustment taking account of operating conditions.
ISSN:1083-4877
1573-9139
DOI:10.1007/s11148-020-00453-9