Русская версия English version

Process models and calculation of temperature field in resistance furnaces of silicon carbide production

V.S. Kuzevanov, S.S. Zakozhurnikov, G.S. Zakozhurnikova, A.B. Garyaev

Vestnik IGEU, 2017 issue 4, pp. 21—29

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Abstract in English: 

Background: High temperatures make it very difficult to experimentally study heat and mass transfer in furnaces for silicon carbide production, which makes it improtant to conduct a calculation study of silicon carbide formation. The analysis of the existing approaches shows that there are no models taking into account all the processes accompanying SiC melting: heat and mass transfer in porous media with chemical reactions under heating, wet material drying and filtration. It is necessary to develop a model that would account for all of these processes and a program of numerical calculation of the furnace temperature field as a supplement to costly experimental melts. The purpose of this numerical analysis is to improve the energy efficiency and to increase the production output by choosing the optimal melting conditions for the set charge blend.

Materials and methods: The mathematical model of heat and mass transfer processes in the resistance furnace was developed according to a phenomenological approach based on the basic postulates of thermodynamics and heat and mass transfer.

Results: We have demonstrated a mathematical description of the process, representing a system of differential equations of substance transfer, including the heat equation for a porous body with internal sources of heat and chemically reactive components and the equation of heat transfer in the process of gas filtering through interconnected pores. The model was tested by comparing the results of the calculation analysis of temperature changes in the volume of the reaction charge with industrial experiment data.

Conclusions: The resulting mathematical model was used to develop a numerical calculation algorithm alowing us to determine temperature fields in the process of silicon carbide formation in a resistance furnace. The correspondence between the experimental and calculated values of the furnace operating parameters shows that the model can be used to select furnace charging options and melting modes in order to increase the yield of the final product and to save energy resources

References in English: 

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Ключевые слова на русском языке: 
печь сопротивления, осадка, пористый материал, производство карбида кремния, физическая модель, математическая модель, температурное поле, тепломассоперенос, объемное тепловыделение, влагоудаление.
Ключевые слова на английском языке: 
resistance furnace, sag, porous material, production of silicon carbide, physical model, mathematical model, temperature field, heat and mass transfer, volumetric heat generation, moisture removal.
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