Characteristics of the powder layer of the glass electric melting furnace
Release time:
2025-06-05 00:00
Source:
The batch layer covered on the surface of the electric melting furnace is called the powder layer, and the height of the powder layer is an important parameter for the design of the glass electric melting furnace. Different from the traditional flame kiln, the electric furnace adopts a vertical melting process, and the powder layer is completely covered on the surface of the molten glass in the melting pool, and at the same time, the heat radiation of the melt to the kiln roof is blocked, so that the temperature of the upper space of the kiln is reduced to below 150 degrees Celsius, commonly known as "cold top". The volatile components in the batch are condensed in the powder layer and flow back into the molten glass, and gases such as carbon dioxide released during the melting process can easily pass through the powder layer and enter the space. The powder layer flows from top to bottom and melts continuously as the temperature rises, gradually completing the clarification and homogenization process.
Cold tops are extremely important for the melting process of electric furnaces, and if a "red top" occurs (the space temperature reaches more than 150 degrees Celsius), it not only increases the energy loss, but also affects the quality of the molten glass. It can be seen that the powder layer plays a role in preventing heat loss and maintaining the stability of the composition in the melting of the electric furnace.
Related News
Advantages and disadvantages of different height powder layers
1. Advantages and disadvantages of powder layer thickness Taking conventional soda-calcium wine bottle products as an example, under normal circumstances, the height of the powder layer is controlled at 200~300mm, and the production effect is the best. If the height of the powder layer exceeds this range, it is easy to cause uneven material, that is,
Characteristics of the powder layer of the glass electric melting furnace
The batch layer covered on the surface of the electric melting furnace is called the powder layer, and the height of the powder layer is an important parameter for the design of the glass electric melting furnace. Different from the traditional flame kiln, the electric furnace adopts a vertical melting process, and the powder layer is completely covered on the surface of the molten glass in the melting pool, and at the same time, the heat radiation of the melt to the kiln roof is blocked, so that the temperature of the upper space of the kiln is reduced to below 150 degrees Celsius, commonly known as "cold top". The volatile components in the batch are condensed in the powder layer and flow back into the molten glass, and gases such as carbon dioxide released during the melting process can easily pass through the powder layer and enter the space. The powder layer flows from top to bottom and melts continuously as the temperature rises, gradually completing the clarification and homogenization process.
Structural reinforcement and design recommendations for the breast wall Problems in the design and reinforcement of the breast wall structure. It is recommended to consider tiling and supporting structures in the design to avoid voids and deformations. At the same time, on-site construction can also be carried out according to the actual situation, and various materials and methods can be used for reinforcement. In addition, the problem that the exposed steel bricks in the oven process are not affixed with thermal insulation paper leads to serious explosions, which reminds everyone to pay attention to this problem and avoid similar situations.
On-site treatment of cover brick tilting problem and problem analysis
Measures to deal with the problem of tilting of cover bricks The top wire of the cover of an electric furnace built by our company is movable and can be twisted by hand. The reason is that the open-hearth furnace is not adjusted in time when it is kept warm and resumed production, which causes the lower pool wall or the top wire of the pool wall to shrink and the gap to become larger when the furnace is stopped. When the temperature rises, the gap becomes larger, and the bricks will go outward, causing them to sink. In order to solve this problem, a wire position can be welded between the supporting plate and the column to make the supporting plate fixed. In addition, the lack of power of the flowing fans, resulting in large temperature differences, may also be one of the reasons. Finally, the cover bricks and the fused bricks between the over-layer are not reinforced and also need to be strengthened.
How to ensure product stability in the selection of raw materials
1. When controlling the moisture of granularity-sensitive raw materials such as calcite white jade, in addition to conventional drying and drying treatment, microwave drying technology can be used to achieve efficient and accurate dehydration. Microwaves can penetrate the inside of the material, causing water molecules to generate high-frequency vibration friction and heat generation, which is 3-5 times more efficient and more evenly distributed than traditional hot air drying. At the same time, the near-infrared spectrometer is used to monitor the moisture content of raw materials in real time, and when the detected value deviates from the set range, the operating parameters of the drying equipment are automatically adjusted to form a closed-loop control system to ensure that the moisture content of raw materials is stable in the process requirement range.
Precautions for electrical accessories replacement and protective measures
Regarding the replacement and protection measures of electrical accessories, the precautions are divided into the following points.