Annealing process and equipment for foamed glass blank

Abstract

The invention relates to an annealing technique and an annealing device. The annealing technique for chunk foam glass is as follows: the annealing is performed in a kiln, and the chunk foam glass is annealed by adoption of the continuous mesh-belt conveying means; and the temperature of a hearth of the kiln is gradually reduced from the high temperature on an inlet to the normal temperature on an outlet. The annealing device for the chunk foam glass comprises the kiln, wherein, the inside of the furnace is provided with a continuous mesh-belt conveyer, provided with 20 to 50 temperature decreasing regions from the inlet to the outlet, and is also provided with a temperature control system. Due to adoption of continuous mesh-belt conveying of the chunk foam glass, continuous operation is realized; due to adoption of gradual temperature reduction in the kiln, the uniform annealing for a long time is realized, thereby high-performance foam glass with difficulty in fracture, high strength and low thermal conduction is produced; and due to arrangement of a plurality of temperature regions inside the furnace, the temperature is convenient to control independently.

Description

Annealing process and annealing equipment for foam glass blank (1) Technical field The invention relates to an annealing process and annealing equipment for foam glass blanks. (2) Background technology Foam glass is a new type of inorganic thermal insulation material with glass as the main raw material and a uniform independent air gap structure. It completely retains the chemical stability of inorganic glass, and has the characteristics of low bulk density, small thermal conductivity, non-combustibility, and high mechanical strength. Cellular glass has good thermal insulation properties that will not deteriorate in a wide temperature range from ultra-low to high temperatures. During the production process of foam glass, the foam glass blanks that reach a high temperature of about 560°C will gradually dissipate heat and cool down to normal temperature in the kiln under the corresponding temperature curve according to the difference in raw materials and sizes, in order to ...

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Problems solved by technology

The heating device arrangement of the existing kiln is that the burner is installed at the lower part of the furnace entrance. The farther the burner is from the kiln, the less heat and the lower the temperature. The heating value of the nozzle and the length of the flame are used for trimming. It is difficult to adjust, and the operator needs to have rich experience.

The kiln does not have a hot air circulation system, the hot air in the furnace cannot be stirred evenly, the temperature difference between the top and the bottom of the furnace is large, and the uneven heat dissipation of the blank makes the blank easy to break, and it is impossible to anneal the high-performance foam glass blank with low thermal conductivity

In summary, the existing trolley-type annealing kiln has low efficiency and low qualified rate of finished products, and is not suitable for the production of high-performance foam glass

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