Physicochemical characteristics of refractory bricks used in the ceramic industry kilns from eastern Colombia
DOI:
https://doi.org/10.61799/2216-0388.973Keywords:
ceramic materials, hive kiln, technological properties, thermal efficiencyAbstract
The main characteristics of the refractory bricks used in the construction of inverted flame ovens (hive) used in the brick industry, present in the metropolitan area of Cúcuta are analyzed. Two materials manufactured in the region (CUC-1 and CUC-2) were analyzed. The characterization included analysis by X-ray diffraction and fluorescence, scanning electron microscopy and microchemistry, dilatometry, thermal conductivity, pyroscopic resistance (fusion cones), compressive strength, percentage of water absorption and dimensional analysis. The results obtained show that a large part of the materials analyzed are characterized by having a high concentration of quartz in their composition (between 48% and 65%), there is a low presence of phases rich in aluminum such as alumina and mullite, which are relevant in this type of applications. The aluminum content is between 16,55 and 17,99% with a higher content in CUC-2. Regarding the pyroscopic resistance, it is evident that all the materials have a softening temperature below 1400°C with CUC-2>CUC-1. The thermal conductivity was between 0,7367 and 0,7404 W/m.K, showing a low applicability as insulator of these materials. The dilatometric changes are more marked in CUC-1 than in CUC-2, a situation that was associated with lower firing temperatures of these bricks.
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