The main body of the float glass melting furnace includes a feeding port, a regenerator, a melting tank, a small furnace, and a working tank. The float glass melting furnace is the key thermal equipment in the glass production process, and the key factor in the life of the float glass melting furnace is the weak link in the melting furnace that is vulnerable to corrosion. Pool wall tiles are directly scoured and eroded by batch materials, molten glass, flame and air flow at high temperatures. Improper use will not only seriously affect the life of the furnace, but also cause a large number of zirconium and corundum inclusions in the glass surface. Affect the quality of glass production.
The erosion method of pool wall tiles
High temperature chemical attack: The powder, glass liquid and flame gas in the kiln will corrode refractory materials at high temperatures. The soda ash, Glauber's salt, and oxides in the batch react with the surface of the refractory material at high temperature to form a low-temperature eutectic or loose substance, and continue to penetrate and diffuse into the brick body through the alternating reaction of the void or interface of the refractory material itself, so that Refractory materials are gradually dissolved, peeled off, thinned, deteriorated, and recrystallized. High temperature scouring: The material pile, glass liquid, flame and air flow will gradually thin the refractory material due to the flow effect at high temperature.
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Erosion steps of fused zirconia corundum pool wall tiles
Fused AZS bricks seep out of high-viscosity glass phase under the action of high temperature, or form high-viscosity glass with nearby molten glass, preventing the bricks from being further corroded. Due to the flow and erosion of piles, molten glass, flames and air currents, fused AZS The high-viscosity liquid glass layer on the surface of the brick is destroyed or left in place, and the new surface is continued to be melted by the powder, liquid glass and flame gas in the kiln at high temperatures. Under the repeated combined action of high temperature chemical erosion and high temperature erosion, the pool wall tiles are continuously eroded.
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Factors affecting the erosion of pool wall bricks
The composition and manufacturing quality of the pool wall tiles determine the corrosion resistance of the pool wall tiles.
Temperature is the main factor that accelerates corrosion chemical reaction and dissolution. The higher the temperature, the faster the erosion of the pool wall tiles.
Glass composition affects the erosion rate of pool wall tiles. For example, when the content of Glauber's salt and fluoride is high, the erosion rate will increase.
Cracks and pores accelerate the erosion and damage of pool wall tiles, especially the horizontal cracks at the gas, liquid, and solid three-phase interface are easily eroded.
The stronger the flow velocity of the pile, molten glass, flame and airflow, the faster the loss of the protective layer and the faster the erosion.
Fuel combustion products, batch volatiles and kiln atmosphere affect the erosion rate of pool wall tiles.
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