Glass melting Furnace

Melting_zones🔥
In glass melting furnaces the main tank is divided into several zones each zone has an important role and specific temperature gradients to ensure that the raw materials are transformed into homogeneous high-quality glass.

话题标签charging zone话题标签 Doghouse
Role allows raw materials to enter and start the gradual heating process Temperature between 1200 to 1300 degrees Celsius where the temperature is relatively low Requirements providing enough heat to initiate the reaction of materials without reaching complete melting to ensure the formation of a preliminary mixture.

Note: there is a pre-charging area called the话题标签 preheating zone which regulates the air reaction with gas and deserves detailed explanation later.

话题标签melting zone话题标签 Crown
Role complete melting of raw materials transforming them into liquid glass Temperature between 1500 to 1550 degrees Celsius which is the highest temperature in the furnace Requirements high temperatures are necessary to break chemical bonds between materials and ensure complete melting and good homogeneity of the glass.

话题标签homogenizing zone
Role mixing the liquid glass to remove bubbles and impurities and ensure homogeneous composition Temperature between 1450 to 1500 degrees Celsius where the temperature gradually decreases to allow gases to separate Requirements this stage is important to ensure the quality of the final product as the glass needs enough time for complete homogenization.

Note: after homogenization and full melting there is a key area called the话题标签 refining or mirror zone before the glass enters the working end.

话题标签gradual_cooling zone话题标签 working_end and话题标签 feeders
Role gradually reducing the temperature to prepare the glass for the forming stage Temperature ranges between 1200 to 1300 degrees Celsius which results in a suitable viscosity Requirements gradual cooling prevents cracks and prepares the glass for the forming stage.

话题标签Spout zone
Role the last point the glass passes through before forming where it is drawn or cut according to the required shape Temperature between 1050 to 1100 degrees Celsius which is the lowest temperature in the tank Requirements maintaining an ideal viscosity allows the final glass shaping to be of high quality.

It is important to control all or most zones to achieve ideal homogeneity and adjust glass viscosity for the final forming stage which contributes to obtaining a defect-free and formable final product.