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

Autor: Severino Rodrigues de Farias Neto, G. Silva Almeida, W.C.P. Barbosa de Lima, J. Barbosa da Silva, Gelmires de Araújo Neves, Antonio Gilson Barbosa de Lima
Rok vydání: 2012
Předmět:
Zdroj: Defect and Diffusion Forum. :267-272
ISSN: 1662-9507
DOI: 10.4028/www.scientific.net/ddf.326-328.267
Popis: 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.
Databáze: OpenAIRE