Simulation Research On The Influence Of Carrier On Microwave Heating Effect

Carrier is a common tool used in microwave metallurgical furnace,which mainly includes microwave heating vessel and supporting parts.At present,the use of containers and supporting parts is mainly based on experience,and the influence of geometric parameters of containers and supporting parts on microwave heating effect is less considered.In fact,the geometric parameters of the container and the structure of the supporting parts will affect the electromagnetic field distribution in the resonator and thus affect the microwave heating efficiency and heating uniformity.Improving microwave heating efficiency and heating uniformity is of great significance for energy saving and emission reduction and product quality improvement.In this paper,using the simulation technique,the influence of the geometric parameters of mullite crucible and silicon carbide crucible and the structure of the supporting parts on the microwave heating effect was investigated by taking the wave-through mullite crucible,the wave-absorbing silicon carbide crucible and the I-shaped supporting part as the research object,and the different effects of Mullite crucible and silicon carbide crucible on the microwave heating of materials were compared.The main research contents of this paper are as follows:(1)The effects of the height,wall thickness and inner diameter of cylindrical mullite crucible on microwave heating effect were investigated.It is found that the different height,wall thickness and inner diameter of mullite crucible all affect the microwave heating process.When the mullite crucible height is changed only,the material temperature rises fastest and the heating efficiency is highest when the height is 50 mm.When the height is 25 mm,the temperature uniformity of the material is the best.When the mullite crucible wall thickness is changed only,the material temperature rises fastest and the heating efficiency is highest when the wall thickness is 7 mm.When the wall thickness is 3 mm,the temperature uniformity of the material is the best.When the inner diameter of mullite crucible is changed only,the material temperature rises fastest and the heating efficiency is highest when the inner diameter is 25 mm.When the inner diameter is 40 mm,the temperature uniformity of the material is the best.(2)The effects of the height,wall thickness and inner diameter of cylindrical silicon carbide crucible on microwave heating effect were investigated.It is found that the microwave heating process is affected by different height,wall thickness and inner diameter of silicon carbide crucible.When the crucible height of silicon carbide is changed only,the temperature rise of the material is the fastest and the heating efficiency is the highest when the height is 40 mm.When the height is 50 mm,the temperature uniformity of the material is the best.When the wall thickness of the silicon carbide crucible is changed only,the temperature of the material is the fastest and the heating efficiency is the highest when the wall thickness is 7 mm.When the wall thickness is 3 mm,the temperature uniformity of the material is the best.When the inner diameter of silicon carbide crucible is changed only,the material temperature rises fastest and the heating efficiency is highest when the inner diameter is 25 mm.When the inner diameter is 50 mm,the temperature uniformity of the material is the best.When only the crucible material is changed,the use of silicon carbide crucible to heat the material compared with the use of mullite crucible to heat the material,the use of silicon carbide crucible can make the material have higher microwave heating efficiency but its temperature uniformity is reduced.(3)Three kinds of support structures were designed and their effects on microwave heating effect were analyzed when they were used in mullite crucible and silicon carbide crucible.It was found that when mullite crucible was used to heat the material,the optimal microwave heating efficiency could be obtained by assembling the supporting parts of the square hole substrate,and the optimal temperature distribution could be obtained by assembling the supporting parts of the original substrate.When the material is heated with silicon carbide crucible,the supporting parts of hexagonal hole substrate can be assembled to obtain the optimal heating efficiency,and the supporting parts of square hole substrate can be assembled to obtain the optimal temperature distribution.