Construction technology and requirements of thermal insulation materials for the bottom and wall of the glass kiln

The heat preservation of the bottom and wall of the glass kiln pool is carried out in a cold state, while the heat preservation of the rest of the kiln is carried out in a hot state.

The key to the bottom insulation is to prevent the glass liquid entering the bottom insulation layer. Therefore, before paving the tiles, the surrounding tiles must be smoothed. The gap between the tiles should not be greater than 1mm, and the expansion joints should be left at the contact with the wall of the pool; The punching layer requires uniform thickness, smooth surface and compact contact with paving tiles.

The depth of the pool is designed to be 1.2m. The wall adopts 1.2m long zirconium corundum bricks. The horizontal seams are eliminated to facilitate the overall heat preservation. However, there is no heat preservation about 200mm below the liquid level to facilitate air cooling; the vertical brick joints of the pool wall are not heat preservation, and There are 20~30mm gaps on both sides to prevent the liquid glass from leaking out, which is convenient for daily maintenance and inspection.

The expansion joints between each section of the
arch and the arch are left 700mm without heat preservation, and 400mm around the galvanic couple is not kept warm.

1.Sealing layer: clean up the heat-preserving parts before construction to expose the original brick surface and no dust in the brick joints. When constructing in a hot state, it is necessary to ensure the construction quality and pay attention to safety. The thickness of the sealing mud should be uniform and the surface should be flat. After being heated and condensed, it will not crack or bulge, and it will adhere firmly to the bricks.

2.Insulation brick layer: When laying insulation bricks, the bottom surface should be in close contact with the sealing layer, and the arrangement of bricks should not be too tight; but it must be neat.

3.Insulation layer: Because the HSJ-780 composite insulation coating is used, the construction requirements are high. Special personnel from the supplier will go to the factory for construction, and the construction personnel will apply different consistency according to different parts. The bonding is firm, does not crack, does not fall off, and has high strength, ensuring the quality of the project.

Because the thermal insulation coating is paste-like and has a certain density, the construction of the breast wall of the clarification part and the surrounding wall of the regenerator must not be applied too thick to prevent it from falling off. Therefore, the construction should be carried out in layers and finally smoothed.

After the furnace is insulated, the thermal efficiency is improved, the heat consumption is reduced, and energy is saved. At the same time, the quality of the molten glass is improved, and the melting environment is greatly improved. Therefore, the glass melting furnace should be fully insulated. But we must also pay attention to the disadvantages of thermal insulation, such as serious corrosion of refractory materials and increased hot repairs of melting furnaces, especially large flat glass kilns. Insulation of the bottom of the pool will cause the risk of floating bricks at the bottom of the pool. Therefore, many factories adopt pool bottom activities. The thermal insulation scheme not only saves energy, but also ensures safe production.