Effect of Firing Rate on the Properties of Chamotte from Kyshtym Deposit Kaolin

The effect of firing rate for Kyshtym deposit enriched kaolin on chamotte properties is investigated. The specific nature of Kyshtym deposit kaolin is the petrographic diversity of the original rocks that has an unfavorable effect on its quality as a refractory raw material. Kaolin plastic propertie...

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Bibliographic Details
Published in:Refractories and industrial ceramics 2022-09, Vol.63 (3), p.252-255
Main Authors: Yakovleva, O. V., Kashcheev, I. D., Zemlyanoi, K. G.
Format: Article
Language:English
Subjects:
Briquets
Ceramics
Chamotte
Characterization and Evaluation of Materials
Chemistry and Materials Science
Clay
Composites
Glass
Kaolin
Materials Science
Mullite
Natural Materials
Phase composition
Plastic properties
Raw Materials
Silicon dioxide
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Summary:The effect of firing rate for Kyshtym deposit enriched kaolin on chamotte properties is investigated. The specific nature of Kyshtym deposit kaolin is the petrographic diversity of the original rocks that has an unfavorable effect on its quality as a refractory raw material. Kaolin plastic properties are studied that make it possible to form a briquette without additional use of any binders, including water. Astudy of the rate, final firing temperature, and holding time at the final temperature show that the rate of temperature increase during chamotte firing does not significantly affect resultant chamotte quality. At the same time an increase in final temperature and holding time significantly affect chamotte quality and phase composition, naturally increasing the yield of mullite and reducing the amount of non-regenerated free SiO 2 . It is established that the maximum firing temperature for enriched kaolin of the Kyshtym deposit based on chamotte may be considered to be a maximum temperature of 1350 – 1400°C and a rate of temperature increase of 35 – 45°C/min.
ISSN:1083-4877
1573-9139
DOI:10.1007/s11148-022-00716-7