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Corundum brick is a type of refractory brick made from high-purity corundum materials, which are derived from natural aluminum oxides or synthetic raw materials. Corundum is a mineral with a high melting point and excellent thermal stability, making it an ideal material for high-temperature industrial applications.
Corundum brick has high strength, excellent resistance to thermal shock, and good chemical stability against acid and alkaline environments. It can withstand temperatures up to 1800°C and is commonly used in the lining of high-temperature kilns, furnaces, and other industrial equipment where high abrasion resistance and thermal shock resistance are required.
There are two types of corundum bricks: sintered corundum brick and fused corundum brick. Sintered corundum brick is made by pressing finely ground corundum into shape and then sintering it at high temperatures. Fused corundum brick, on the other hand, is made by melting high-purity raw materials in an electric arc furnace and then pouring the molten material into molds to form bricks.
Corundum bricks can also be further classified based on their alumina content, such as high-alumina corundum brick and low-alumina corundum brick. High-alumina corundum brick has a higher alumina content and better thermal shock resistance, while low-alumina corundum brick has lower alumina content but higher thermal conductivity.
1.High temperature resistance: Corundum brick has a high melting point (about 2050°C) and can withstand very high temperatures without losing its strength or structure.
2.Excellent mechanical strength: Corundum brick has high compressive strength and resistance to wear and abrasion, making it suitable for use in harsh and demanding environments.
3.Resistance to chemical attack: Corundum brick is highly resistant to chemical attack by acids and alkaline substances, making it ideal for use in chemically aggressive environments.
4.Low thermal conductivity: Corundum brick has low thermal conductivity, which makes it an effective insulator against heat.
5.Good thermal shock resistance: Corundum brick has good thermal shock resistance, allowing it to resist sudden changes in temperature without cracking or breaking.
6.High purity: Corundum brick is made from high-purity raw materials, which ensures minimal impurities and provides excellent resistance to corrosion and erosion.
7.Low porosity: Corundum brick has low porosity, which enhances its stability and resistance to chemical attack.
The price of corundum brick can vary depending on a number of factors such as the size, shape, grade and supplier. Generally speaking, corundum bricks are considered to be high-end refractory materials and tend to be more expensive than other types of refractory bricks.
As of my knowledge cutoff date of September 2021, the price range for corundum bricks was between $800 and $1200 per ton, with an average price of around $1000 per ton. However, it is important to note that prices may vary based on the quantity purchased, shipping costs, and current market conditions.
It's recommended to contact suppliers or manufacturers directly to obtain up-to-date pricing information for specific sizes and quantities of corundum bricks.
Corundum brick is a high-grade refractory material mainly made of alumina (Al2O3). The following are some main physical and chemical indicators of corundum bricks:
1.Common specifications and density
Common corundum brick specifications are 230*114*65mm, 230*114*75mm, etc.; the common density is between 3.0~3.5g/cm³.
2.Compressive strength
usually in the range of 100-250MPa, its compressive performance is better.
3.Refractoriness
It can withstand extremely high temperature to above 2200℃, which is more resistant to high temperature than ordinary silicate, silicon carbide and other materials.
4.Corrosion resistance
Corundum bricks have strong resistance to acid and alkali corrosion, and will not corrode and deform quickly even if they come into contact with acid and alkali media.
5.Coefficient of thermal expansion
small thermal expansion coefficient and good thermal stability, so it is suitable for high temperature applications.
The thermal conductivity of corundum bricks is low, which can effectively prevent heat leakage and ensure the energy-saving performance of equipment.
The thermal conductivity of corundum bricks can vary depending on factors such as density, porosity, and temperature. Generally, the thermal conductivity of corundum bricks ranges from 2.5 W/m·K to 3.5 W/m·K.
Corundum bricks are high-quality refractory materials made primarily from alumina (Al2O3) with minimal impurities. They have excellent high-temperature stability, mechanical strength, and resistance to chemical corrosion.
It's important to note that the specific thermal conductivity may differ based on the manufacturing process, composition, and porosity of the corundum bricks. Higher densities and lower porosities typically result in lower thermal conductivities.
For precise information on the thermal conductivity of corundum bricks from a particular manufacturer or supplier, it is recommended to consult their technical specifications or contact them directly. They can provide you with the most accurate data based on their product formulation and testing.
Songlou Industrial Zone, Xinmi City, Henan, China
