What is glass melting process?
The melting of glass frit is carried out in a glass melting furnace. In order to understand the structure and performance of a glass melting furnace, we must first understand the entire process of glass melting.
silicate formation stage：
This stage is a series of physical, chemical and physical-chemical changes that occur rapidly after the batch materials enter the kiln under the action of 800~1000°C, such as heating of the powder, evaporation of water, decomposition of salts, polycrystalline transformation, etc.
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Glass liquid formation stage：
When the batch materials are heated to 1200°C, various silicates and friction melts are formed. Until the temperature reaches about 1300°C, molten glass begins to form.
Glass liquid clarification stage：
After the glass liquid formation stage is completed, there are many bubbles and ash bubbles (small bubbles) in the melt. The stage of removing gas inclusions visible to the naked eye and eliminating pore tissue from the glass liquid is called the clarification stage. This process is completed at high temperatures because the viscosity of glass decreases rapidly with increasing temperature.
Glass liquid homogenization stage：
After the molten glass is formed, the chemical composition and temperature of each part of the molten glass are different, and some inhomogeneities are also mixed in, so a homogenization process is required. Its principle mainly relies on diffusion and convection.
Glass liquid cooling stage：
In order to facilitate the forming of glass, the glass liquid must be cooled evenly to the forming temperature. Generally, the forming temperature is 200~300°C lower than the clarification temperature.
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