Glass furnace: how to improve the service life of glass electric melting furnace
Release time:
2025-03-21 00:00
Source:
With the development of industrial technical glass, the life of glass electric melting furnace has also been extended, and the quality of glass has been significantly improved, which is related to the emergence of refractory materials, new species of refractory materials. In particular, it is closely related to the development of fused refractories in the last century. Due to the high density, wear resistance, good high temperature mechanical properties and corrosion resistance of glass electric melting furnace electric refractory material.
For many years of development in China, the basic problem of controlling the ignition of large and small glass electric melting furnaces is that China follows the old tradition, that is, after the glass electric melting furnace is heated up for 10-13 days, the temperature change range of 800-850 °C inside the furnace is too large, and the overfire in our working temperature is mainly to consider the internal structure of siliceous refractories and clay refractories to analyze the crystal transformation, according to the study of the thermal expansion coefficient and temperature distribution range of these two refractories, including the development of the program heating curve, Overheating. During the heating and preheating activities, the domestic glass electric melting furnace can basically heat up according to the heating curve, and adjust the pull bar in time and effectively, so that the refractory materials of each part of the glass electric melting furnace continue to expand evenly.
The temperature fluctuation from the range of 850-1200 °C is large and difficult to control, sometimes fluctuating above 100 degrees in an hour, which will cause drastic changes in the refractory, especially at 950-1200 °C, the crystal transformation of the molten refractory material, accompanied by a volume shrinkage of 6.9%.
Therefore, in this temperature range, the heating operation should take into account the fused AZS material, which can lead to cracking of the fused brick if the temperature fluctuates greatly. Under the influence of high temperature and violent fluctuations, the corundum bricks in the glass electric melting furnace will form transverse and longitudinal cracks in a short time, especially in the flame space, such as the breast wall hook bricks, the entrance arch bricks, small chimneys, small furnace mouths, etc., generally have no obvious impact in the early stage of the new kiln operation, but in the middle of the kiln operation, the hook bricks will be turned over, exposing the supporting plate, causing the breast wall to tilt towards the kiln mouth. The above-mentioned serious chest wall tilting accidents have occurred many times in domestic glass enterprises, resulting in collapse, water plugs, and major economic losses caused by glass electric melting furnaces.
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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.
Glass furnace: how to improve the service life of glass electric melting furnace
With the development of industrial technical glass, the life of glass electric melting furnace has also been extended, and the quality of glass has been significantly improved, which is related to the emergence of refractory materials, new species of refractory materials. In particular, it is closely related to the development of fused refractories in the last century. Due to the high density, wear resistance, good high temperature mechanical properties and corrosion resistance of glass electric melting furnace electric refractory material.
High temperature resistance of glass electric melting furnace
The glass processing industry in our country belongs to the unpopular industry, engaged in very few people, but our country's annual demand for glass is indeed the world's first, such a large demand-supply ratio has not led to a large number of practitioners to switch, what is the reason for this? I think it may be for professional glass furnace technology does not understand it. Many people have never been involved in this field, and their technical understanding is not much, so this is the main factor in the current shortage of talents in the glass industry.