Al2O3 ≥/%: 60-65
Density: 2.55 - 2.65 grams per cubic centimeter
0.2 MPa refractive index T0.6 ≥/℃: 1550 - 1650 MPa
Compression strength: 85 - 90 megapascals
Standard size: 230*114*65 millimeters
It is divided into clay-bonded, Si3N4-bonded, Sialon-bonded, β-SiC-bonded, Si2ON2-bonded and recrystallized silicon carbide bricks. Generally, black silicon carbide (with a SiC content greater than 96%) is used as the raw material, along with a binder (or without a binder), and through processes such as batching, mixing, molding, and firing, it is prepared. The main varieties include oxide-bonded silicon carbide bricks, carbon-bonded silicon carbide bricks, nitride-bonded silicon carbide bricks, self-bonded silicon carbide bricks, recrystallized silicon carbide bricks, and semi-silicon carbide bricks, etc. They have good wear resistance, corrosion resistance, high high-temperature strength, good thermal shock stability, high thermal conductivity, and small thermal expansion coefficient. It is a high-performance refractory material.
Advantages of silicon carbide bricks
High temperature stability
Silicon carbide bricks can withstand extremely high temperatures, typically above 1500°C, and even up to 1800°C. Therefore, they are widely used in high-temperature industrial fields such as metallurgy, chemical engineering, and glass manufacturing.
Outstanding fire resistance performance
Silicon carbide bricks possess excellent fire resistance and can withstand chemical corrosion and high-temperature erosion. They perform well in acidic and alkaline environments and are not easily eroded by molten metals and glass.
High strength and wear resistance
Silicon carbide bricks possess extremely high hardness and wear resistance. They can be used for long periods in harsh working conditions such as high temperatures and high pressures without any wear.
Excellent thermal conductivity
The thermal conductivity of silicon carbide bricks is the highest among refractory materials. The thermal conductivity of silicon carbide bricks enables the rapid transfer of heat throughout the structure, thereby enhancing thermal efficiency and energy-saving effects.
Excellent thermal shock stability
Silicon carbide bricks have a low thermal expansion coefficient and excellent thermal shock resistance. They can withstand the thermal stress caused by sudden temperature changes and reduce the risk of thermal shock damage.
Applications of silicon carbide bricks
Metallurgical industry
Silicon carbide bricks are commonly used in the inner linings of metallurgical steel cylinders, nozzles, plugs, blast furnace bottoms and furnaces, as well as in heating furnaces with waterless sliding rails. They can withstand extremely high temperatures and chemical erosion, while also having excellent thermal conductivity, ensuring the efficient operation of the metallurgical process.
Chemical Industry
In the chemical industry, silicon carbide is used in oil-generating devices and organic waste incinerators. The corrosion resistance and stability of silicon carbide enable it to withstand acidic, alkaline and high-temperature environments, effectively protecting equipment from chemical erosion.
Glass industry
Silicon carbide bricks are used as the refractory lining material for glass melting furnaces. They can withstand the erosion of high-temperature glass liquid and the continuous thermal cycling, ensuring stable and efficient glass production.
Power Industry
In the power industry, silicon carbide bricks are widely used in high-temperature equipment such as coal-fired boilers, power station boilers, and incinerators. They can withstand high temperatures and thermal stress, and have excellent thermal conductivity, which can protect the equipment from the effects of high-temperature combustion gases and slag.
Steel industry
Silicon carbide bricks can be used in non-ferrous metal smelting furnaces, distillation tower trays, side walls of electrolytic cells, and melting metal crucibles.
Ceramic industry
High-tech ceramic kiln components such as aluminum electrolysis cell linings, aluminum melting conduits and ceramic kilnware, large and medium-sized blast furnace lower bodies, furnace flanks and furnace chases, aluminum smelting furnace linings, zinc distillation tank linings, etc.
