Things to be aware of when using broken glass in float glass production!

Things to be aware of when using broken glass in float glass production!

[China Glass Net] 1. Secondary Accumulation: The refractory material in the melting furnace will be corroded by the molten glass, increasing the proportion of Al2O3 and Fe2O3 in the broken glass. After remelting, there will be secondary accumulation and increase. The difficulty of homogenization makes the color of the finished glass deeper. 2. Secondary volatilization: After the cullet is remelted, some volatile components such as boron oxide, zinc oxide, lead oxide, and alkali metal oxide will be volatilized twice. For example, sodium oxide will be less remelted than before. 0.20%, so add it. 3. The difference between the surface of the glass shard and its internal composition: There are many broken bonds on the surface of the cullet, which will quickly adsorb the atmosphere and water to form a surface colloid, which will cause the difference between the surface and the internal components. If the effective convection during the melting process is less or the melting temperature is lower, the finished glass will have line marks, and the chemically active glass is more prone to these problems. When the amount of glass cullet used is too large, the three factors mentioned above are the cause of the unevenness of the structure to make the hardness of the finished glass small and fragile. 4. Reduction performance of molten glass during remelting: When remelting cullet, some volatile components will decompose out of oxygen. When oxygen enters the broken glass, the molten glass will overflow, which will make the molten glass reductive. In this case, the color of some of the components containing the variable element may change. 5. Clarification: A small amount of chemical gas will be mixed in the broken glass. Some secondary bubbles will be generated during the remelting process. If the amount of broken glass added is large, the bubbles will increase and the difficulty of clarification will increase.

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