Heat and Mass Transfer and Volume Variations during Drying of Industrial Ceramic Bricks: An Experimental Investigation

Abstract:

The purpose of this paper is to present an experimental study of brick drying. For the drying experiments, industrial brick (clay) was dried in an oven under controlled conditions of air velocity, air temperature and air relative humidity. The continuous drying experiments ended when the mass reached constant weight. In order, to obtain the balanced moisture content, each sample was kept under the same drying air temperature for 48 hours inside the oven. The tests were performed under atmospheric pressure. Results of the drying and heating kinetics and volume variations during the process are shown and analyzed. It was verified that air temperature has big influence in the drying rate during process. It was verified that the largest temperature, moisture content and stress gradients are located in the vertexes of the brick. The drying process happens in the falling drying rate period.

• Periodical: Defect and Diffusion Forum (Volumes 326-328)
• Pages: 267-272
• DOI: https://doi.org/10.4028/www.scientific.net/DDF.326-328.267
• Online since: April 2012
• Authors: J. Barbosa da Silva, G. Silva Almeida, Gelmires Araújo Neves, W.C.P. Barbosa de Lima, Severino Rodrigues de Farias Neto, Antônio Gilson Barbosa de Lima
• Keywords: Drying, Experimental, Holed Bricks, Shrinkage

References

[1] W.D. Callister, Jr. and D.G. Rethwisch: Fundamentals of materials science and engineering: an integrated approach (3rd. ed. John Wiley & Sons, Inc. USA, 2008).

[1] W.D. Callister, Jr.: Materials science and engineering. An introduction (7rd ed., John Wiley & Sons, Inc. USA, 2007).

[3] D.A. Brosnan and G.C. Robinson: Introduction of drying of ceramics: with laboratory exercises (The American Ceramic Society Westerville, 2003).

[4] M. Hasatani and Y. Itaya: Drying'96 Vol. A (1996), p.27.

[5] Y. Itaya and M. Hasatani: Drying Technol. Vol. 14 (1996), p.1301.

[6] J.S. Reed: Principles of ceramics processing (John Wiley & Sons, Inc., New York, 1995).

[7] A. Sander, D. Skanki and B. Nenad: Ceramics Int. Vol. 29 (2003), p.641.

[8] A.A.J. Ketelaars, W. Jomaa, J.R. Puiggali and W.J. Coumans: Drying'92 Vol. A (1992), p.293.

[9] A.J.J. van der Zanden, A.M.E. Schoenmakers and P.J.A.M. Kerkof: Drying Technol. Vol. 14 (1996), p.647.

[10] S. Su: Applied Clay Sci. Vol. 12 (1997), p.189.

[11] A.J.J. van der Zanden: Modelling and simulating simultaneous liquid and vapour transport in partially saturated porous materials (in: Mathematical Modeling and Numerical Techniques in Drying Technology, New York: Marcel Dekker, Inc., 1997).

[12] Y. Itaya, S. Taniguchi and M. Hasatani: Drying Technol. Vol 15, no. 1 (1997), p.1.

[13] Y. Itaya, S. Mori and M. Hasatani: Drying'98 Vol. A (1998), p.240.

[14] G. Musielak: Drying'2000 Vol. 1 (2000), p.1.

[15] F. Augier, W.J. Coumans, A. Hugget and E.F. Kaasschieter: Chem. Eng. J. Vol. 86 (2002), p.133.

[16] J. Banaszak and S. Kowalski: Drying'2000 Vol. 1 (2000), p.1.

[17] B. Kroes, W.J. Coumans and P.J.A.M. Kerkhof: Drying'96 Vol. A (1996), p.159.

[18] J.B. Silva: Ph. Thesis, Federal University of Campina Grande, Campina Grande, Brazil, (2009).

DOI: 10.21475/ajcs.18.12.08.pne1177

[19] J.B. Silva, G.S. Almeida, W.C.P. B. de Lima, G.A. Neves and A.G.B. de Lima: Def. Diff. Forum Vols. 312-315 (2011), p.971.