Transient Thermal Analysis in an Intermittent Ceramic Kiln with Thermal Insulation: A Theoretical Approach

Gomez, Ricardo S.; Porto, Túlio Rafael Nascimento; Magalhães, Hortência Luma Fernandes; Guedes, Clotildes A. L.; Lima, Elisiane Santana de; Wanderley, Dannyelle Macedo Albuquerque; Lima, Antônio Gilson Barbosa de

doi:10.1155/2020/6476723

Cited by 2 publications

(2 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The main steps in the manufacturing process of ceramic materials are exploration, raw material preparation, conformation and thermal processing (drying and firing) [6]. During the raw material preparation stage, water is added to the clay in order to increase its plasticity, allowing the piece to be molded or conformed easily without cracking [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Investigating the Drying Process of Ceramic Sanitary Ware at Low Temperature

et al. 2023

Self Cite

View full text Add to dashboard Cite

Drying is one of the stages with the highest energy consumption in the manufacturing process of ceramic materials and aims to reduce the product’s moisture to levels necessary for safe firing stage, reducing the chances of defect formation. For sanitary ware, there is an additional energy cost in the pre-drying stage, which takes place immediately after removing the parts from the molds, and is carried out in an environment with lower temperatures (ranging from 30 to 40 °C). This work aims to experimentally study the drying process of sanitary ware at low temperatures, with particular reference to sanitary toilets with industrial dimensions. Four drying experiments were carried out in an oven with different operating conditions (temperature and relative humidity). The results indicate that an increase in temperature and reduction in relative humidity provoke a faster drying rate. For some physical situations, it is more interesting to dedicate efforts to reducing the relative humidity of the drying air instead of seeking solutions to raise its temperature. Furthermore, a correlation between the linear retraction and moisture content was observed; the greater the moisture loss, the greater the sample shrinkage.

show abstract

Section: Introductionmentioning

confidence: 99%

“…Finally, knowing the vapor pressure (P v ) and the saturation vapor pressure (P g ), the relative humidity of the air inside the oven was calculated using Equation (6).…”

mentioning

confidence: 99%

Investigating the Drying Process of Ceramic Sanitary Ware at Low Temperature

et al. 2023

Self Cite

View full text Add to dashboard Cite

show abstract

Heat and Mass Transfer in Structural Ceramic Blocks: An Analytical and Phenomenological Approach

Silva

Araújo²,

Delgado³

et al. 2022

Energies

View full text Add to dashboard Cite

The ceramic industry is one of the pillars of the Brazilian economy, characterized by making low-cost products and an obsolete manufacturing process from a technological point of view. Among the various stages of production of ceramic materials, drying is one of the most energy-consuming and, in general, causes structural damage to the product, compromising its mechanical performance and final quality. Despite the relevance, studies on the drying of ceramic materials are mostly conducted at the experimental level and limited to some specific operational conditions. In this scenario, this research aims to theoretically study the heat and mass transfers in industrial ceramic blocks during drying. Based on the lumped analysis method, and considering the dimensional variations of the material, new phenomenological mathematical models and their respective analytical solutions are proposed to describe the kinetics of mass loss and heating of the material. The predicted results referring to the thermal and gravimetric behavior of the block during the oven drying process under different conditions are compared with the experimental data, obtaining excellent agreement between the results. Furthermore, the transport coefficients were estimated, proving the dependence of these parameters on the drying air conditions. The convective mass transfer coefficient ranged from 6.69 × 10–7 to 15.97 × 10–7 m/s on the outer surface of the block and from 0.70 × 10–7 to 1.03 × 10–7 m/s on the inner surface of the material when the drying air temperature ranged from 50 to 100 °C. The convective heat transfer coefficient ranged from 4.79 to 2.04 W/(m2.°C) on the outer surface of the block and from 1.00 to 0.94 W/(m2.°C) on the inner surface of the material when air temperature ranged from 50 to 100 °C.

show abstract

Transient Thermal Analysis in an Intermittent Ceramic Kiln with Thermal Insulation: A Theoretical Approach

Cited by 2 publications

References 32 publications

Investigating the Drying Process of Ceramic Sanitary Ware at Low Temperature

Investigating the Drying Process of Ceramic Sanitary Ware at Low Temperature

Heat and Mass Transfer in Structural Ceramic Blocks: An Analytical and Phenomenological Approach

Contact Info

Product

Resources

About