SINTERING OF CLAY PELLETS , CHARCOAL AND FLY ASH IN A COMBUSTION CELL IN FIXED BED : ANALYSIS OF PROPAGATION OF A COMBUSTION REACTION FRONT THROUGH A POROUS MATERIAL
Alvino Oliveira Melo1; Emanuel Negrão Macêdo2; Márcio Ferreira Martins3; Danielly Quaresma2; José Antônio da Silva Sousa2; Alacid Neves2
1 Instituto Federal de Educação Tecnológica do Maranhão - IFMa; 2 Universidade Federal do Pará - UFPa; 3 Universidade federal do Espírito Santo - UFES
doi:10.20906/CPS/COB-2015-0016
Resumo
A great preoccupation of humanity turns around the preservation of the environment, seeking constantly through studies and searches alternatives to find a balance of coexistence between man and nature. Normally, industries in general, produce waste at its majority toxic which damage the environment, humans being and other diversities of life inserted in it. Inserting itself in this context, this paper makes a study of evolution of the temperature of combustion of a mixture, in predefined proportions of fly ash from boiler industries, clay and charcoal. The experiments were performed in a combustion reactor in order to assess the temperatures and if the values of these temperatures would be sufficient to initiate the process of sintering of the pellets. For the experiments performance, parameters such as inlet velocity of the fluid (air), diameters of the pellets (mixture of charcoal, ash and clay) and size of charcoal crushed in a disk mill were varied and the effect of variations of these parameters were analyzed for each experiment. The historical temperatures were recorded by a data acquisition instrument and subsequently plotted for analysis. Temperatures varying in the range of 800°C-1200°C were obtained and these values are sufficient to initiate the process of sintering of the pellets.
Palavras-chave: Combustion reactor; charcoal; ash; clay; porous media