Glass melting furnaces have now been widely used in glass industrial furnaces. Various high-tech composite sealing refractory materials are used. The seals of the large turret, the bottom and the wall of the pool all need to adopt a multi-layer sealing structure, so that the glass melting furnace Achieve "sealing". This not only ensures the safe use of the furnace, but also avoids the occurrence of furnace accidents, greatly prolongs the service life of the furnace, and the implementation of sealing and enhanced heat preservation greatly improves the melting process. Therefore, sealing the furnace is a major improvement in the structure of the glass melting furnace.
Silicon sealed refractory series for dome roof
The series of high-tech composite sealing refractories for glass melting furnaces mainly include: series of siliceous sealing refractories for the ceiling, and series of fused zirconium corundum sealing refractories for the bottom and walls of the pool. The two types of materials are typical high-tech multiphase composite sealing refractory materials, with dynamic characteristics that are difficult to see in other composite materials.
Silicone sealed refractory is an important new type of refractory widely used in glass kilns. The sealing of the smelting kiln is achieved through the sealing mud used in the masonry, the dry sealing powder used to deal with cracks in the kiln drying process, and the multi-level sealing of the sealing layer material laid on the top of the silica brick slab. .
Silicone sealed refractory series is a modern high-tech multi-phase composite material, which is composed of six phases including aggregate, ceramic bond, dispersion medium phase, modified additional phase, chemical addition phase and water. The various special requirements put forward by the use of SiO2 ceramic bond have significantly improved the technical performance indicators of the siliceous sealed refractory. The refractoriness of the sealing masonry mud and sealing layer material is as high as 1750℃, and the softening point under load is up to 1710℃. These two high-temperature performance indexes are respectively 40℃-50℃ higher than that of high-silicon high-quality fire clay and large mortar bricks. It is a major progress in the research of Silicone refractories at home and abroad.
Has a special high bonding strength at room temperature, low temperature, medium temperature and high temperature, which is another important reason for the successful use of this high-tech composite sealant in the furnace turret. The bonding strength at room temperature can ensure that the masonry dome bricks do not draw and sink after the dome is removed; after drying at 110 ℃ at low temperature, the cold flexural strength is more than 5 times higher than that of other high-quality muds. , Up to 4MPa; medium temperature (800℃-1000℃) strength improvement and enhancement is one of the main characteristics of this composite sealing material ceramic bond comprehensive system; due to good sintering effect at high temperature, the large stubble will have overall structural strength.
Fused zirconium corundum sealed refractory series for pool bottom and wall
With the substantial increase in the melting temperature and output of glass production, the strengthening of heat preservation requires the extension of the furnace life, and the adoption of electric boosting and bubbling technology, the implementation of strict and effective sealing of the furnace is an important development trend of modern glass melting furnaces. , Especially the bottom and wall of the pool that are in direct contact with the glass, it is particularly important.
The series of fused zirconium corundum sealing refractories for the bottom and wall of the pool is a cast type prepared by using fused zirconium corundum as the raw material, combined with a new generation of ceramic binder, adding dispersed phase, modified phase, and chemical addition. Modern sealing materials. It is mainly used for the high-tech composite sealed refractory series used in the bottom, wall and small furnace of the glass melting furnace in conjunction with the fused zirconium corundum bricks. Its resistance to glass erosion is very good, which is the key to ensuring the safe operation of the melting furnace. Where, the non-common traditional materials can be compared with the corrosion resistance index of 0.6 times that of fused zirconia corundum bricks, and more than double that of phosphate-bonded AZS sealing ramming materials. Its excellent corrosion resistance is due to the use of fused zirconia corundum as the main raw material. This raw material has almost no pores, and it is made of corundum, mullite, and oblique zircon with strong corrosion resistance. Phase composition; on the other hand, this new type of sealing castable, as a result of the highly dispersed ceramic bond and colloidal particles filling the voids of the sealing material after molding, forms a fine capillary-like dense anti-erosion structure, which greatly improves the material The anti-destructive property of the kiln has been applied in the actual sealing of the bottom and wall of the melting furnace, and has achieved outstanding use effects and successful sealing experience.
The series of high-tech composite sealing refractory materials for glass melting furnaces are based on the point of view of composite materials. The composition, function and role of each component phase, and the dynamic reactions that occur with each other have been studied, and this new type of sealing refractory material has been determined. The production method, technical route, and technological theory basis of the company have successfully developed a series of modern high-tech dynamic composite sealing materials, adding new varieties to the refractory industry.