Mullite Castable mainly uses composite binders, including a-Al2O3 and SiO2 ultrafine powder, soft clay, and hydrated alumina. At low temperatures, ultrafine powder and hydrated alumina play a combined role. At medium and high temperatures, Al2O3 reacts with SiO2 to form mullite to act as a combination. From RS Monolithic Mullite Castable Factory, this mullite refractory castable uses secondary mullite to improve and enhance its performance and is widely used in industrial furnaces below 1400 °C.
The performance of the mullite raw material used in the mullite refractory castable affects the performance of the mullite castable. Sintered or fused mullite clinker is one of the high-quality refractory raw materials. The main mineral composition is mullite (about 95%) and a small amount of corundum and A12O3 68%~75%, SiO2 23%~30%. Mixing ratio and properties of mullite refractory castables. Mullite castable has excellent performance. When the amount of clay is high, the performance will decrease. Generally, it is advisable to add 5%, which is essentially a phosphoric acid-clay composite binder. In addition, high strength and good thermal shock resistance are the characteristics of this mullite castable.
Mullite refractory materials refer to refractory materials made of synthetic mullite as the main raw material and with mullite as the main crystal phase. The classification and production process are as follows: 1. Sintered mullite products 2. Cast mullite products.
The production process of mullite refractories is similar to that of high alumina refractory castable products. The key points of the process that need to be paid attention to are accurate batching and particle grading, the ratio of aggregate to fine powder, uniform mixing, high-pressure molding, and full sintering. Firing temperature: 1550 ~ 1600 ℃ when sintered mullite is used as aggregate, >1700 ℃ when fused mullite is used as aggregate.
Mullite Castable in RS Monolithic Refractories Factory
Application of Mullite Refractory Castable in High-Temperature Industrial Furnace
With the development of high-temperature industrial furnace technology, the performance requirements for refractory materials continue to increase. As a new type of refractory material, mullite refractory castable has attracted attention because of its excellent performance and wide application. The performance characteristics of mullite refractory castable and its application advantages in high-temperature industrial furnaces ensure the normal operation of high-temperature industrial furnaces in production.
The application of mullite refractory castables in high-temperature industrial furnaces shows better performance. Mainly in the following.
Good thermal shock resistance. Mullite combined with refractory castable has good thermal shock resistance, can withstand thermal stress at high temperature, and reduce the risk of thermal shock damage.
High slag resistance. Mullite refractory castable has high slag resistance and can effectively resist the erosion and infiltration of high-temperature slag.
Long service life. Mullite refractory castable has a long service life, reduces the maintenance and replacement times of equipment, and improves production efficiency.
Good construction performance. Mullite refractory castable has good fluidity and plasticity, which is convenient for construction and molding. Shorten the construction period and improve production efficiency.
Advantages of mullite refractory castables in high-temperature industrial furnaces
Environmental protection. Mullite refractory castables use composite binders to avoid harmful impurities in aluminate cement and are conducive to environmental protection.
Energy saving. Mullite refractory castable has high thermal stability and good thermal insulation performance, which can effectively improve the thermal efficiency of industrial furnaces and reduce energy consumption.
Cost-effectiveness. Due to the longer service life and lower maintenance costs of mullite refractory castables, its overall cost-effectiveness is better than traditional refractory materials.
Adaptability. Mullite refractory castables are suitable for various high-temperature industrial furnaces, especially in the temperature range below 1400 ° C, and have good use effects.
As a new type of refractory material, mullite refractory castable has significant performance advantages and good economic benefits in the application of high-temperature industrial furnaces. The development and promotion of this new refractory material are of great significance for improving the service life of high-temperature industrial furnaces, reducing maintenance costs, improving production efficiency, and realizing green production. However, the application of mullite combined with refractory castables still needs further research and improvement to meet the special needs of different types of high-temperature industrial furnaces. RS Monolithic Mullite Castable Factory has been committed to the production and sales of refractory lining materials for high-temperature industrial furnaces. Our technical team can also provide solutions for the lightweight insulation castable refractory lining of high-temperature industrial furnaces. Contact us for a free quote.
