[Zhongbo.com] (1) The batch material produced by glass is heated by the high temperature radiation of the solid in the longitudinal direction of the kiln along the longitudinal direction of the kiln. The first stage is the silicate reaction between various components in the raw material. The second stage is The unreacted foamy silicate mash is gradually melted into a glass liquid in the third stage. Sodium oxide penetrates into the interior from the glass phase and pores of the brick wall by means of penetration, diffusion and metastasis, and the protective layer is lost under the action of glass temperature erosion and glass flow scouring. This is the main factor in the erosion of the pool wall.
(2) Due to the difference in temperature between the horizontal and vertical directions in the furnace, under the seemingly calm glass surface of the furnace, there are actually various intricate convections of the glass in the transverse and longitudinal directions. The chemical zone, the foam zone, and the clear glass zone are not only heated by the flame but also by the melt circulating glass stream. It is also these diversified convections that promote the melting, clarification and homogenization of the glass, as well as the erosion of the walls.
(3) From the practical experience of glass melting furnace production, the glass liquid surface line to the following 300 mm, due to the small viscosity of the glass liquid, the flow rate is fast, is a serious part of the pool wall erosion erosion. The serious part of the wall erosion is the wall of the small furnace at the junction of gas, liquid and solid three-phase, rather than the wall of the hot spot furnace with higher temperature at the junction of gas and liquid, so the pile is tight. The wall of the pool is easy to cause erosion of the pool wall.
(4) Generally, the glass melting furnace adopts air-cooling measures to protect the pool wall. By blowing air to the outside of the pool wall below 100 mm, the local temperature inside the pool wall brick is lowered, and the pile and glass solution are delayed. Erosion of brick wall tiles. The cooling wind of the pool wall plays a very important role in extending the life of the pool wall. If the blowing position is unreasonable, or the blowing volume is too small and the blowing strength is weak, the effect of the cooling wind on the wall of the pool cannot be fully exerted, resulting in an accelerated erosion rate of the brick wall, and the unstable wind control of the wall is likely to cause the brick wall to be anxious. The heat is cold and burst.
(5) At present, most float glass manufacturers adopt the “double high heat load†melting operation system to increase the temperature of the 1#～2# small furnace, and accordingly increase the temperature of the feed tank, resulting in the active root of the pile. Due to the melting operation, the temperature of the pool wall on both sides is lower than the temperature in the middle of the furnace, and the resulting lateral convection of the molten glass leads the pile during the advancement to the wall of the tank. Moreover, since two large-scale float glass melting furnaces use two inclined blanket type feeders, the individual stocks cannot individually adjust the direction of the strands, and the longer the time, the easier to form an "inverted figure-eight" pile that is deflected toward the sides of the pool wall. . The skewed pile directly adheres to the wall of the small furnace wall of the chemical zone and gradually melts, which produces a large flushing effect on the wall of the tank, and accelerates the erosion rate of the brick wall of the small furnace in the chemical zone.
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