Use of Undersize Fractions of Refractory Claystone for Grog Manufacturing in Shaft Kilns

Lenka Nevřivová

doi:10.4028/www.scientific.net/SSP.276.242

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Use of Undersize Fractions of Refractory Claystone for Grog Manufacturing in Shaft Kilns

Abstract:

Refractory aluminosilicate grogs are made by firing refractory clays and claystones. They are fired predominantly in rotary or shaft kilns. Prior to firing in shaft kilns, particles of claystone smaller than 35 mm are separated These fine fractions cannot be processed in a shaft kiln, since they lower the quality and homogeneity of firing. However, these claystones can be briquetted into larger pieces (5 – 6 cm), which can be easily fired in shaft kilns. It is possible to modify the raw material by adding correcting materials or other types of clay. This method can then be used for making special grogs. The paper discusses the possibilities of manufacturing grog with an increased Al₂O₃ content with undersize fractions of claystone mined in Březinka. The research focused on the influence of raw material water content and compacting pressure on the final properties of fireclay grog, and determining the influence of firing temperature on the properties of the grog.

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Periodical:

Solid State Phenomena (Volume 276)

Pages:

242-247

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.276.242

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Online since:

June 2018

Authors:

Lenka Nevřivová*

Keywords:

Apparent Porosity, Briquetting, Refractory Grog, Shaft Kiln, Waste Claystone

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References

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