Corundum refractory bricks are a type of dense, high-temperature-resistant material used in the construction of various high temperature applications such as furnace linings, kiln linings, and other industrial applications.
Corundum, also known as alpha-alumina, is the primary component of these bricks. Corundum is a naturally occurring mineral that is made up of aluminum oxide (Al2O3) crystals. It is extremely hard and has excellent chemical stability, making it an ideal material for high-temperature applications.
In the manufacturing of corundum refractory bricks, various raw materials are used to make the final product. Some of the materials that are commonly used in the production of these bricks include alumina, bauxite, kaolin, and other clay materials.
Alumina is a high-purity form of aluminum oxide and is often used as the primary raw material in the production of corundum refractory bricks. The process of manufacturing these bricks involves the mixing of alumina with other raw materials, such as silica, to form a dense and durable composite material.
Bauxite is also commonly used as a raw material in the production of corundum refractory bricks. This material is a naturally occurring mineral that is rich in aluminum oxide and iron oxide. It is first processed to remove impurities and then mixed with other materials to form a uniform mixture.
Kaolin and other clay materials are also used in the production of corundum refractory bricks. These materials are often added to the raw mix to improve the workability of the material, enhance its strength, and make it easier to shape.
In addition to the raw materials used in the manufacturing process, corundum refractory bricks may also contain various additives such as zirconium oxide, magnesium oxide, and titanium oxide. These additives are used to improve the properties of the finished material, such as its thermal stability and chemical resistance.
Zirconium oxide is often added to corundum refractory bricks to improve their thermal shock resistance. It has a high melting point and can withstand extreme temperature fluctuations without cracking or breaking.
Magnesium oxide is another additive that is commonly used in the production of corundum refractory bricks. It is added to the raw mix to reduce the amount of shrinkage that occurs during firing, which can help to improve the overall strength and durability of the finished product.
Titanium oxide is also used in the production of corundum refractory bricks. It helps to improve the material’s thermal stability and resistance to chemical attack, making it an excellent choice for use in high-temperature applications.
In conclusion, corundum refractory bricks are made up of a variety of raw materials and may contain various additives to enhance their properties. The primary component of these bricks is corundum, which provides excellent thermal and chemical stability, making it ideal for use in high-temperature applications.