Numerical Simulation of Drying Ceramic Using Finite Element and Machine Vision

Khalili, Khalil; Bagherian, M; Khisheh, S.

doi:10.1016/j.protcy.2013.12.504

Cited by 21 publications

(25 citation statements)

References 6 publications

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“…Diversos autores relatam que a curva de secagem pode ser dividida em um estágio de taxa constante e um estágio de taxa decrescente (Araújo et al, 2016;Brosnan & Robinson, 2003;Ford, 2013;Fortes & Okos, 1980;Khalili et al, 2014;Kowalski, 2012). Se o teor de umidade for plotado em função do tempo de processamento, obtém-se uma curva de secagem semelhante as que estão mostradas nas Figuras.…”

Section: Curvas De Secagemunclassified

Processo de secagem de materiais cerâmicos argilosos: uma revisão

Gomez

Magalhães

Porto

et al. 2020

RSD

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A secagem é uma operação de transferência de calor e massa envolvendo a remoção de umidade, sendo uma etapa importante e de elevado custo no processo de manufatura de diversos produtos. Para materiais cerâmicos, o processo de secagem é necessário para retirar a água que foi adicionada a argila na etapa de moldagem e conferir a resistência necessária para reduzir as chances de falhas durante a etapa de queima do produto. O controle do processo de secagem é essencial para reduzir defeitos no material, perda de produtividade e consumo energético. Devido à importância, esse trabalho tem por objetivo apresentar uma revisão de diversos tópicos relacionados com a secagem de materiais cerâmicos. Aqui são discutidos diferentes aspectos tais como: os fundamentos, as cinéticas de remoção de umidade, os defeitos, o controle e a otimização do processo de secagem, com ênfase a produtos de argila. A ideia é fornecer subsídios para que pesquisadores e industriais possam melhorar seus conhecimentos e tomar decisões apropriadas sobre este tópico de grande importância para a economia do país.

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Section: Curvas De Secagemunclassified

Processo de secagem de materiais cerâmicos argilosos: uma revisão

Gomez

Magalhães

Porto

et al. 2020

RSD

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“…If the drying process is not performed correctly, it can lead to material defects, loss of productivity, and increase in the energy consumption. According to the literature [6][7][8][9][10][11][12][13][14][15][16][17][18], the operating variables that influence the drying process are temperature, relative humidity and velocity of the drying air, time, shape, thickness, area/volume ratio, particle size, initial moisture content, and properties of the ceramic material.…”

Section: Introductionmentioning

confidence: 99%

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

Gomez

Porto

Magalhães

et al. 2020

Advances in Materials Science and Engineering

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Increasing the thermal efficiency of drying and firing processes of ceramic products plays an important role for industries that want to remain competitive in the market. Thus, this work aims to evaluate the influence of the type and thickness of thermal insulations, applied on the external sidewalls of an intermittent ceramic kiln, on heat transfer, temperature distribution in the insulating material, maximum external surface temperature, and energy gain, compared to the kiln without thermal insulation. All proposed mathematical formulations are based on the energy conservation, and mathematical procedures are implemented in Microsoft Excel software. Here, it was tested four types of thermal isolators: fiberglass, rockwool, calcium silicate, and ceramic fiber. Results indicate that the greater the thickness of the thermal insulation, the lower the maximum external surface temperature and the greater the energy gain when compared to the kiln without thermal insulation. In addition, fiberglass is the insulating material, among the four types analyzed, which provides greater energy gain and greater reduction in maximum external surface temperature.

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“…Some of these studies are related to the mass diffusion coefficient, porosity, permeability, and drying kinetics [4,5,6,7,8,9]. There are still those which seek to understand the defects such as cracks caused by poor material firing [7,9,10,11,12,13].…”

Section: Introductionmentioning

confidence: 99%

Industrial Ceramic Brick Drying in Oven by CFD

et al. 2019

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The drying process is a step of ceramic brick production which requires the control of process variables to provide a final product with a porous uniform structure, reducing superficial and volumetric defects and production costs. Computational fluid dynamics (CFD) is an important tool in this process control, predicting the drying physical phenomenon and providing data that improve the industrial efficiency production. Furthermore, research involving CFD brick drying has neglected the effects of oven parameters, limiting the analysis only to the bricks. In this sense, the aim of this work is to numerically study the hot air-drying process of an industrial hollow ceramic brick in an oven at 70 °C. The results of the water mass and temperature distributions inside the brick, as well as moisture, temperature, velocity and pressure fields of the oven drying air at different process times are shown, analyzed and compared with experimental data, presenting a good agreement.

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Numerical Simulation of Drying Ceramic Using Finite Element and Machine Vision

Cited by 21 publications

References 6 publications

Processo de secagem de materiais cerâmicos argilosos: uma revisão

Processo de secagem de materiais cerâmicos argilosos: uma revisão

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

Industrial Ceramic Brick Drying in Oven by CFD

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