Continuous microwave sintering or melting forming method and device of dielectric material

Abstract

A continuous microwave sintering or melting forming method and device of a dielectric material is characterized in that a structural layer which is a metal shell material layer/ a heat preserving material layer/ a microwave absorbing material layer is adopted and combined to form a bottom structure of a microwave oven; the bottom of the oven continuously runs; the dielectric raw material is continuously compactly paved and covers the microwave absorbing material; in case of normal temperature, the dielectric raw material to be sintered or melted does not absorb the microwave, and the microwave penetrating through the dielectric raw material is suddenly absorbed by the microwave absorbing material at the lower part and is converted into heat energy, so that the microwave absorbing material layer at the bottom of the oven is treated as a large-area heating element which is capable of heating and increasing the temperature of the dielectric raw material which covers the microwave absorbing material layer and is to be sintered or melted; the dielectric raw material to be sintered or melted is converted into the microwave absorbing material by layers, and then the dielectric raw material suddenly absorbs the microwave energy in order to be quickly sintered or melted.

Description

technical field [0001] Microwave heating technology and equipment. Background technique [0002] Microwave sintering and melting is a method of using the special wave band of microwave to couple with the basic fine structure of the material to generate heat. The dielectric loss of the material makes the material as a whole heated to the sintering temperature or melting temperature to densify the sintering or melting method. It has the characteristics of fast speed, high energy utilization rate, high heating efficiency, safety, sanitation and pollution-free, and can improve the uniformity and yield of products. Improving the microstructure and performance of sintered materials or melted materials has become a hot spot in the field of material sintering. new research hotspot. [0003] However, due to many dielectric materials, such as certain ceramic materials, cement raw materials, glass batch materials, etc., the change with temperature is very drastic. Their dielectric lo...

AI Technical Summary

Problems solved by technology

Its disadvantages are: 1. The length is limited, which affects the output and quality of its products; 2. The thermal insulation performance is poor, and the energy loss is large; 3. The sintering temperature is low, and it cannot be used for material melting; 4. The service life is short, and operation and maintenance more difficult

[0005] In addition, the current large-scale melting of glass is carried out by putting loose glass batch materials with poor thermal conductivity on the surface of the molten glass, and using surface flame heating in the glass melting pool.

Its main disadvantages are: 1. The thermal efficiency is extremely low, the highest is only about 30%; 2. Greenhouse gas emissions and pollution are serious; 3. The investment is large and the production environment is harsh; 4. The melting rate is very low and the melting speed is slow

Its disadvantages are: 1. The drying, thermal decomposition and sintering process and production equipment are very complicated, with low thermal efficiency, high equipment investment and production costs; 2. The service life of equipment (especially rotary kiln sintering equipment) is short and difficult to operate and maintain ; 3. It will cause a large amount of greenhouse gas emissions and environmental pollution

The disadvantages are: 1. High sintering temperature and low thermal efficiency; 2. It is difficult to build a very long kiln, with large heat loss and poor production environment; 3. Using combustion heating will cause a large amount of greenhouse gas emissions and environmental pollution

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