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Matters needing attention when using broken glass in the production of float glass

  • Author:Fanyu
  • Source:Chinamirrormanufacturer.com
  • Release on:2018-05-29
1. Secondary accumulation: The refractory material in the melting furnace will be eroded by the glass solution, increasing the proportion of Al2O3 and Fe2O3 in the broken glass. After remelting, there will be secondary accumulation, which will increase the homogenization. The difficulty makes the color of the finished glass deeper.
2. Secondary volatilization: After the glass is remelted, some volatile components such as boron oxide, zinc oxide, lead oxide, and alkali metal oxide will volatilize secondarily. For example, sodium oxide will be less than before after remelting. 0.20%, so add it.
float glass
3.glassThe difference between the surface of the debris and its internal components: there are many broken bonds on the surface of the broken glass, which will quickly adsorb the atmosphere and water to form a surface colloidal state, which in turn causes differences between the surface and internal components. If the effective convection in the melting process is small or the melting temperature is low, the finished glass will have line marks, and the chemical properties of the glass are more prone to these problems. When the amount of glass shreds used is too much, the above-mentioned three factors are the cause of the non-uniformity of the structure, which makes the hardness of the finished glass smaller and brittle.
4. Reducing performance of glass during remelting: When the glass is remelted, some easily volatile components will decompose oxygen, and when the oxygen enters the glass, the glass will overflow and the glass liquid will be reduced. In this case, the glass of some constituents containing variable elements will change in color.
5. Clarification: A little chemical gas will be mixed in the broken glass. During the remelting process, some secondary bubbles will also be produced. If the amount of broken glass added is large, bubbles will increase, and the difficulty of clarification will increase.