COBEM99

S3 Ciências dos Materiais

Title:

STUDY OF THE INFLUENCE OF SAND PERCENTAGE IN CLAY-SAND MIXTURES ON THE DRYING PROCESS OF CERAMIC MATERIALS

Summary :

STUDY OF THE INFLUENCE OF SAND PERCENTAGE IN CLAY-SAND MIXTURES ON THE DRYING PROCESS OF CERAMIC MATERIALS ABSTRACT: THE PRODUCTION OF CERAMIC PIECES IN THE STATE OF PARÁ HAS BEEN MADE BY A SIGNIFICANT NUMBER OF SMALL AND MEDIUM MANUFACTURES, BEING IMPORTANT ITS PARTICIPATION IN THE AMAZON ECONOMY. THE DRYING OF CERAMICS BODIES IS FUNDAMENTAL STEP IN CERAMIC INDUSTRY TO OBTAIN A FINAL PRODUCT OF QUALITY AND CONSEQUENTLY OF GOOD COMMERCIALIZATION. EXPERIMENTS HAVE BEEN CARRIED OUT IN A DRYING TYPE TUNNEL WITH FORCED CONVECTION IN ORDER TO INVESTIGATE THE INFLUENCE OF SAND PERCENTAGE OF SAND-CLAY MIXTURES ON THE DRYING EFFICIENCY AND THE QUALITY OF CERAMIC MATERIALS. THE SAND PERCENTAGE IN CERAMIC SPECIMEN PREPARED WITH THE CLAY-SAND MIXTURES WAS 0%, 5%, 15%, AND 25%. AN ANALYSIS OF THE LINEAL SHRINKAGE IS PRESENTED FOR ALL THE CERAMICS BODIES SUBMITTED TO DRYING , BY ANALYZING THE BIGOT CURVES. AFTER IN ALL THE ACCOMPLISHED REHEARSALS, THE QUALITY OF THE FINAL CERAMIC PRODUCT, AFTER BURNING THE CERAMIC SPECIMEN, SUCH AS: NON-OCCURRENCE OF TRINES, NON-DEFORMATION, AND GOOD MECHANICAL RESISTANCE, INDICATE THE HIGH PERFORMANCE OF THE DRYING PROCESS. IN THIS WORK, THERE HAS BEEN ALSO CALCULATED AND ANALYZED THE PHYSICAL PROPERTIES OF THE FINAL CERAMIC PRODUCT, SUCH AS: APPARENT POROSITY, ABSORPTION OF WATER, APPARENT DENSITY, AND RESISTANCE TO RUPTURE. KEYWORDS: DRYING, CERAMICS DRYING, SHRINKAGE.

Author :

AMARAL, ANDRÉ DE SIQUEIRA MENDES
BRAGA, NAZARENO DE PINA
NEVES, ROBERTO DE FREITAS
SOUZA, CÉLIO AUGUSTO GOMES DE

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