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Use of Burnt Sludge as Chamotte and its Influence on the Phase Composition of Acid-Resistant Materials

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Refractories and Industrial Ceramics Aims and scope

This paper presents results of studies on acid-resistant materials produced from raw clay, chamotte from kaolin clay burnt at 1200°C, and high-alumina (Al2O3 > 70%) calcined alkali-etched sludge as a waste product of Samara Metallurgical Plant. The studies conducted have shown that it is not possible to obtain an acid-resistant material from raw kaolin clay containing less than 18% Al2O3 at a firing temperature of 1300°C, and the use of an optimal amount of chamotte (40%) in the compositions of ceramic masses enables to obtain an acid-resistant material that meets the standard requirements based on raw kaolinite clay at a temperature of 1300°C. The supplementation of the ceramic mass of high-alumina raw materials with 40% calcined alkali-etched sludge (and chamotte) ensures the manufacturing of products with high physical and mechanical properties even at 1250°C.

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Notes

  1. The physical and mechanical parameters, diffraction patterns, and IR spectra of the samples of acid-resistant tiles of compositions Nos. 1 and 2 are presented in the previous article.

References

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Authors and Affiliations

  1. Samara State Economic University, Samara, Russia

    V. Z. Abdrakhimov

  2. Samara University (S. P. Korolev Samara National Research University), Samara, Russia

    E. S. Abdrakhimova

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  1. V. Z. Abdrakhimov
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  2. E. S. Abdrakhimova
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Correspondence to V. Z. Abdrakhimov.

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Translated from Novye Ogneupory, No. 3, pp. 52 – 56, March, 2022

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Abdrakhimov, V.Z., Abdrakhimova, E.S. Use of Burnt Sludge as Chamotte and its Influence on the Phase Composition of Acid-Resistant Materials. Refract Ind Ceram 63, 169–173 (2022). https://doi.org/10.1007/s11148-022-00701-0

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