Technology
Passed the ISO9001 quality system certification and the establishment of industrial drying industry alliance standards under the guidance of the Chinese Standardization Research Institute.
Passed the ISO9001 quality system certification and the establishment of industrial drying industry alliance standards under the guidance of the Chinese Standardization Research Institute.
- May 03, 2019 -
The low strength and difficult drying of honeycomb ceramics after extrusion have seriously restricted the wide application of honeycomb ceramics. In recent years, microwave drying technology has been applied to honeycomb ceramics, which can solve the problems of low strength and difficult drying. The results show that the moisture content of honeycomb ceramics after forming can be reduced by about 10% by microwave drying technology. By analyzing the drying process of honeycomb ceramics, a combination method of hot air drying and microwave drying was put forward, combining the advantages of both methods, in order to achieve the goal of optimizing energy saving.
Microwave has a penetrating electromagnetic wave with a wavelength of 1 mm to 1 m and a frequency of 3.0-times, 102-3.0-times and 105 MHz. At present, microwave drying technology has been widely used in light industry, food industry, chemical industry, agriculture and agricultural products processing at home and abroad. It has been studied and applied in papermaking, ceramics, wood, food, asphalt, sewage treatment, surfactant, perfume, ore, medicine, concrete, paint, etc.
honeycomb ceramics have more water and more pore during forming, and the pore wall in the body is very thin. Therefore, the traditional method will lead to uneven heating and extremely difficult to dry; due to the poor thermal conductivity of honeycomb ceramics, the drying process is particularly strict (such as environmental protection automobiles, regenerators, infrared radiation burning plates and other honeycomb ceramics). If the drying process is not well controlled, it will easily lead to deformation and affect the porosity and specific surface area. At present, the drying methods of honeycomb ceramics include natural drying, far-infrared drying, steam drying and microwave drying. Microwave drying can overcome the problem of inconsistent drying speed between surface and interior of thick-walled honeycomb ceramics. At the same time, it also solves the problems of low strength before drying, difficult handling and easy cracking after drying.
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