What are the factors that affect the service life of glass furnace refractories?
Shenyang refractory brick mill manufacturers introduced that the size, quality, and production effect of the kiln are different due to the type of glass produced. Through the comparison and analysis of the performance of the refractory, the use effect of the refractory is studied. At present, refractory materials resistant to high temperature glass liquid erosion can effectively improve the weak link of the furnace. The following will analyze several typical refractory materials based on this characteristic.
(1) Fused casting materials
The fused cast material is distributed in a certain proportion. Through high temperature melting, sufficient casting is achieved to ensure the use of refractory materials. The material after fused casting is mainly composed of alumina, zirconia, and fused cast materials. Among them, zirconia is mainly used in the electric melting furnace production of specific glass. At present, this type of fused casting material is mainly used in the world, which has a strong influence. Our country's refractory materials use a certain proportion of high-temperature materials after the fusion is completed, the refractory products are formed by pouring. The refractory materials of glass kiln are mainly zirconium corundum, alumina and so on. The use of different liquid glass adjustments to determine the main production range of oxidation products. China mainly uses fused cast refractories, and there are few on a scale.
(2) Silicon brick material
Silicon brick material is the main refractory product used in glass kiln, mainly used in the outer flame part of the furnace. Through normal operation of silicon bricks, the quality of silicon bricks is ensured. However, the heating of the silicon brick is not very uniform, and the non-refractory part is likely to cause a reduction in service life. The selection of high-quality silicon brick and more high-temperature refractory materials is a problem that the glass kiln industry in China needs to study.
(3) Magnesium refractory material
The glass kiln uses magnesium metal material, which is mainly composed of fused magnesium bricks and alloy magnesium bricks. Through the heat storage reserve, the standard level of dosage is increased, and the service life of glass kiln in China is increased. However, the metal will be consumed by the long-term use of temperature. This kind of magnesium metal oxide material is the main weak link in the glass kiln.
Affecting factors of glass melting furnace refractories
The refractory material of glass melting furnace is mainly affected by many factors such as service life, high temperature resistance level, glass product quality, energy consumption and product cost value. With the development of glass melting furnace technology, the product quality of refractory and high temperature technology is continuously improved. By analyzing the possible weak links in the refractory quality of new materials for glass melting furnaces, and analyzing the effects of using glass melting furnaces with an angle analysis, the weak links of glass melting furnaces are gradually recognized.
1. Service life
Glass melting furnace refractory products are prone to corrosion under long-term high-temperature effects. As the temperature increases, the high temperature resistance index decreases, and the erosion situation intensifies. The higher the temperature and the greater the level of erosion, the broken glass easily penetrates into the fuel, the impurities in the kiln increase, and the refractory material is seriously eroded. This directly affects the long-term use of glass melting furnace materials, which is one of the weak links of glass melting furnaces. .
The service life of glass melting furnaces in China is generally about 8 years. If the temperature resistance of glass melting furnaces can reach more than 10 years, it can greatly reduce the cost of glass melting furnaces, increase the level of erosion of impurities, and improve the purity of glass liquids. Quality, reduce economic losses, and reduce the level of cost control. Analyze the overall service life of the melting pool, heat storage chamber and refractory of the furnace, gradually increase the life level of the glass furnace, ensure the reasonable maintenance of the service life of the furnace, and ensure that the glass furnace can better improve the refractory level To ensure the temperature control and management of glass melting furnaces.
2.Control and adjustment of the internal size of the furnace
The size of the furnace interior directly affects the use of the furnace. The larger the furnace, the higher the energy consumed and the slower the temperature rise. In large-scale furnaces, dynamic heating and subsequent preheating control and adjustment technology are required to strengthen the high-temperature resistance level of large-scale furnaces, regulate the three indicators of product quality, output and energy consumption of furnaces and gradually improve refractories. The quality guarantees the precision standards and scale of glass melting furnaces. According to the size of the furnace, the temperature is gradually increased to prevent the melting rate of the furnace from being too high and affect the high temperature resistance standard of the furnace.
3. Analysis of the impact of furnace combustion value technical standards
Refractories need to be adjusted and applied in accordance with glass melting furnace technology. Combustion with all-oxygen materials can effectively reduce the level of clarification technology, enhance the effect of all-oxygen combustion, and improve the combustion level of glass furnaces. The glass melting furnace can effectively increase the alkali concentration in the kiln atmosphere, but the alkali will cause uneven dissolution, affect the high temperature resistance level of the glass, and cause changes in the properties of the refractories.
4, the impact of glass quality
The refractory level of the glass melting furnace may be affected by the erosion of glass production, causing uneven dissolution and affecting the glass dissolution level. This non-uniform dissolution can cause defects such as bubbles, stones or undulations in the glass. Therefore, the glass liquid, alkali vapor and air bubbles in the refractory easily cause the performance quality of the glass product to decrease. To strengthen the level of glass quality, it is necessary to improve the optimal management of the quality of refractory materials.
Application trends of glass refractory development
(1) Application range of glass melting furnace
China's glass melting furnaces have undergone material integration, integration and reorganization of production enterprises, and weak technical links, process links and product quality. For example, for fused cast materials, China changes the fused cast materials to achieve the effect of improving the fused cast high temperature resistant materials in China. However, compared with the international level, the high temperature resistance level of China's fused glass materials cannot fully meet and meet the requirements of today's glass melting furnaces. In order to effectively strengthen the use of fused cast refractories, establish good refractories, improve the establishment of refractory production material management standards, systematically allocate corporate production, strengthen industry integration and reorganization, and create high-temperature-resistant high-quality material production enterprises, thereby gradually reducing Multiple configurations of production enterprises affect the overall development of the industry.
(2) Application and development of refractory temperature of glass melting furnace
China's high temperature resistant furnaces need to mainly study the development of low temperature melting, according to the level of glass melting furnaces to achieve all-oxygen combustion, silicon-free material melting, and electric-assisted melting. The use of high temperature resistant materials greatly improves the high temperature resistance level of glass. The high temperature resistance quality and performance are gradually improved, and the use of the furnace is also improved, and the fire resistance consumption is gradually reduced. The refractory use of glass melting furnaces in China shows that the consumption of glass melting furnaces will not increase, but the structure of refractory materials will change greatly. Strengthen the proportion of refractory consumption of glass melting furnaces, gradually improve the structure of refractory materials, change the amount of magnesium bricks and silicon bricks, realize the gradual improvement of the level of use of molten cast refractories, strengthen the use of new refractory materials, and ensure the use of glass furnaces .