Application of mullite bricks in glass melting furnaces. Mullite refractory materials, mullite bricks are mainly high-alumina refractory materials with mullite as the main crystal phase. Mainly used for hot blast furnace roof, blast furnace body, and bottom, glass melting furnace regenerator, etc. Especially in the glass kiln, it is widely used. Common mullite bricks include corundum mullite bricks, zirconium mullite bricks, and mullite insulation bricks. Rongsheng kiln refractory manufacturers can provide 92 95 99 high-purity white corundum bricks and mullite bricks for glass kilns.
Characteristics of mullite bricks
- Mullite bricks have high refractoriness, which can reach above 1790 °C.
- The starting temperature of load softening is 1600~1700℃.
- The compressive strength at room temperature is 70-260MPa. Good thermal shock resistance.
Application of Mullite Brick in Glass Furnace
The main crystal phase of mullite bricks is mullite. Mullite has high refractoriness, high load softening temperature, low high-temperature creep rate, good thermal shock resistance, and acid slag corrosion resistance. The substructure of the vertical flue and the inner surface of the horizontal flue can be selected.
- Front gable
The front wall of the glass melting furnace is adjacent to the batch area. Due to the large temperature fluctuations in this area and the large amount of raw material dust, the conditions are relatively harsh. Sintered mullite bricks have good resistance to rapid cooling and rapid heating, and have good resistance to batch dust erosion. Therefore, the suspension wall and the wing wall of the feeding port can be designed to use re-sintered fused mullite bricks.
- Stuck neck
The neck is generally designed with a water bag and an agitator, and a large temperature difference will be generated in the space of the neck during equipment maintenance. Sintered mullite bricks are a better design choice here.
- Small furnace and the upper wall of the regenerator
The use of fused zirconia corundum bricks for small furnaces is currently the best design choice. Because mullite bricks, especially mullite bricks made of fused mullite, also have good resistance to the erosion of batch materials and alkali vapor. Resintered fused mullite bricks may be used on small furnaces. At least it can be used in the last few pairs of small furnaces to improve the operating environment of the small furnace and reduce the cost of this part. Similarly, re-sintered fused mullite bricks can also be used for the upper wall of the regenerator. Compared with alkaline bricks, mullite bricks have lower thermal conductivity and expansion coefficient, which can reduce the expansion and deformation tendency of the kiln body and reduce the heat dissipation and heat preservation costs of the kiln body.
- Coal-fired glass melting furnace small furnace ascending channel and tongue
As we all know, the service life bottleneck of gas kilns lies in the small furnace. In the traditional design, silica bricks are used to equip the fused zirconia corundum bricks for the tongue. Since the temperature here is lower than 1450°C, it is not a good choice to use silica bricks in this position. This part is severely corroded, and the good anti-corrosion performance of mullite bricks can prolong the service life of this part. In addition, fused zirconia corundum bricks are used for the tongue wall. Due to their poor thermal shock stability, re-sintered fused mullite bricks may be a better choice.
- Lattice body of gas regenerator
The grid body of the gas regenerator currently designed is made of clay bricks, and the general service life is 3 to 4 years, which cannot meet the needs of the longer and longer kiln life. Replacing checker bricks is not only labor-intensive but also causes damage to other parts of the kiln. Using a certain amount of sintered mullite bricks on the top of the gas grid can increase the service life of the kiln.
- Furnace grate and bottom lattice body
Condensate of flue gas will be deposited at the bottom of the regenerator grid body. The longer the kiln age, the more frequent the operation of the bottom regenerator, and the more thermal shocks the furnace grate and the bottom checker bricks need to experience. The good thermal shock performance and corrosion resistance of sintered mullite bricks can improve the service life of this part.
- Operating hole
Mullite bricks have good thermal shock stability and high-temperature strength. It can be used in various operating holes of the melting furnace, such as observation holes, spray gun holes, air supply holes, and other parts.
The application of mullite bricks in glass melting furnaces has the advantages of corrosion resistance, erosion resistance, lightweight, and high softening temperature under load. Customers who need mullite bricks can contact Rongsheng Kiln Refractories Company. Rongsheng company has advanced refractory brick production lines.
Application of Lightweight Mullite Brick in Glass Electric Furnace
The lightweight mullite brick hanger has an absolute advantage in performance. At present, the electric melting furnaces with a melting area of more than 8m2 have basically adopted lightweight mullite bricks as the roof structure. Light temperature mullite refractory bricks, mullite bricks for JM23 26 28 30 glass kiln.
- Application of lightweight mullite brick hanger in the small electric melting furnace
Small electric melting furnaces (melting area 1~8m2) can completely use the hanging structure. Mullite Bricks High-Temperature Refractory Bricks Lightweight Thermal Insulation Bricks. With the reduction of material costs and people’s emphasis on the reuse of resources, it is believed that there will be more space for the use of hanging rails in small electric melting furnaces.
- Application of lightweight mullite brick hangers in large electric melting furnaces
With the gradual development of electric melting furnaces in the direction of a large melting area (melting area greater than 20m2) in recent years, new challenges have been put forward for the design of the hanging wall. The larger area of the hanging wall means an increase in weight. In order to ensure the reusability of the hanging wall, our company has created a split hanging wall structure. Divide each bridge body into 3 parts, each part bears load independently and can be disassembled separately for hoisting during loading and unloading.
The thermal insulation effect of industrial kilns is one of the key factors affecting energy consumption. It is necessary to develop a product that has a long service life and can reduce the quality of the furnace body. Mullite poly light bricks, 0.6 0.8 1.0 lightweight thermal insulation mullite bricks, energy saving and heat insulation, special-shaped bricks can be customized. Lightweight mullite bricks belong to mullite bonded materials, which have the characteristics of good high-temperature performance and low cost and can be used for kiln lining. Not only can it effectively reduce the mass of the furnace body and save fuel, but it can also prolong the service life of the furnace lining and reduce maintenance costs.
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