TY - NEWS
TI - Characteristics of refractory bricks used in the coke production kilns in Colombia
AU - Gelves Diaz, John Freddy
AU - Sánchez Zuñiga, J
AU - Sánchez Molina, Jorge
AB - A study has been carried out on the main physicochemical characteristics of the
refractory bricks that are currently used in traditional coke-making kilns in Colombia. Two
classes of material (brick) used in this industry were collected, which come from a geographical
area of the country that supplies brick to many kiln builders. These materials were characterized
by X-ray diffraction and fluorescence, scanning electron microscopy, dilatometry, thermal
conductivity, pyroscopic resistance, and percentage of water absorption. The results obtained
show that these materials have had very low firing temperatures in the factory, which is
evidenced in the dilatometry, microscopy and water absorption percentage data. This
characteristic brings with it high firing shrinkages when subjected to high temperatures (> 4%
at 1,200 °C). There is a high presence of quartz in the material (40% or more), an aspect that
increases the risk of fissure formation. Chemically there is a limited aluminum content (between
22% and 23%) compared to other reference refractories. The onset of fusion of these materials
occurs around 1,360 °C. The thermal conductivity obtained can be considered moderate
(between 0.634 W⁄mK and 0.760 W⁄mK), thus demonstrating limited applicability as an
insulator.
DA - 2021-06-04
UR - https://repositorio.ufps.edu.co/handle/ufps/6593
ER -