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Silicon Carbide Bricks
Brand: HongTai Refractory
Category: High Temp Refractory Bricks
Key Features: High Strength and Hardness
Payment Terms: T/T, Credit Cardse, E-Checking, Alibaba Trade Assurance
Product Information
Silicon carbide bricks are advanced refractory materials made of SiC as the main raw material. They are widely used in industries like steel, non-ferrous metallurgy, petrochemicals, power, ceramics and aerospace.
Silicon carbide bricks can be classified into 3 types:
- Clay-bonded
- Clay-bonded silicon carbide bricks are manufactured using a combination of coarse, medium, and fine silicon carbide particles, which are mixed according to specific ratios. Clay is added to the mixture, and the resulting blend is shaped using a brick press. The bricks are then dried for 2-4 days before being fired in a tunnel kiln at a temperature of 1400°C. These bricks exhibit high thermal conductivity, low thermal expansion coefficients, excellent thermal shock resistance, and impressive wear resistance.
- High alumina
- High alumina silicon carbide bricks incorporate fine powder into the base material, accounting for 30% of the composition. These bricks are fired at a temperature ranging from 1370-1480°C and maintained at that heat for 6-8 hours. Notable for their excellent thermal shock resistance, high thermal conductivity, and impressive strength, these refractory bricks are a reliable choice in demanding applications.
- Corundum silicon
- Corundum silicon carbide bricks are produced using brown corundum as the aggregate, combined with 10% silicon carbide fine powder. Phosphoric acid serves as a binding agent, and the mixture is pressed and shaped using a brick press. The bricks are dried and fired at a high temperature of 1450°C. These corundum silicon carbide bricks boast high strength, excellent wear resistance, robust slag erosion resistance, and reliable thermal shock resistance.
In summary, silicon carbide bricks have a combination of useful properties that make them versatile refractory materials for high-temperature applications. By varying the bonding method and density, their properties can be tailored to suit different applications.
| ltem | Oxide bond SiC brick | Green SiC brick | Corundum silicon carbide brick | Mullite silicon carbide brick | High alumina SiC brick |
| SiC, % | ≥90 | ≥90 | ≥70 | ≥65 | ≥20 |
| Al2O3, % | – | – | – | ≥20 | ≥55 |
| Fe2O3, % | ≤0.6 | ≤0.6 | ≤1.0 | ≤1.0 | ≤1.5 |
| Bulk density, g/cm3 | ≥2.6 | ≥2.6 | ≥2.7 | ≥2.3 | ≥2.5 |
| Apparent porosity, % | ≤17 | ≤17 | ≤22 | ≤20 | ≤20 |
| Cold crushing strength, MPa | ≥100 | ≥100 | ≥100 | ≥80 | ≥80 |
| Refractoriness under load (0.2MPa,0.6%) | ≥1650 | ≥1650 | ≥1700 | ≥1600 | ≥1600 |
- High Thermal Stability
- Low Thermal Expansion
- High Thermal Conductivity
- High Mechanical Strength
- Excellent Chemical Resistance
- Excellent Abrasion Resistance
- Oxidation Resistance
- High Refractoriness
| Industry | Application |
|---|---|
| Metallurgical industry | Blast furnace linings, hearths, tap holes |
| Non-ferrous industry | Aluminum reduction cells, copper smelting |
| Glass industry | Regenerator walls, checker brick linings |
| Ceramics industry | Kiln furniture, setters, supports |
| Petrochemical industry | Reactor linings, high-temperature equipment |
| Chemical industry | Acid-resistant linings, high-temperature reactors |
| Waste incineration | Combustion chamber linings, flue gas ducts |
| Power generation | Boiler linings, ash hoppers, cyclone separators |
