Mullite is widely used in the production of refractory materials due to its excellent thermal stability, high melting point, and resistance to thermal shock. It is commonly employed in the manufacturing of kiln furniture, such as shelves and setters, which are essential for high-temperature processes like ceramic firing and metallurgical operations. Its low thermal expansion and high mechanical strength make it ideal for use in furnace linings and insulating materials, ensuring durability and efficiency in extreme heat environments. Additionally, mullite is utilized in advanced ceramics for applications in the aerospace and automotive industries, where its lightweight and heat-resistant properties are critical. It is also a key component in the production of ceramic filters for molten metal filtration, enhancing the quality of castings by removing impurities.