The main content of silicon carbide bricks is SIC, and its content reaches 72%-99%. Silicon carbide bricks can be combined with clay, oxide, and silicon nitride in different ways. The characteristics of its response and the industry of application are also different.
Silicon carbide brick
Item | Bonding Type | |||||||
Clay | Mullite | SiO2 | Si3N4 | Sialon | β-SiC | R-SiC | Siliconizing reaction | |
SiC % | >85 | >70 | ≥90 | ≥72 | ≥71 | ≥94 | ≥99 | ≥80 |
Si3N4 % | / | / | / | ≥20 | / | / | / | / |
ال2اے3 % | / | / | / | / | ≥5 | / | / | / |
Si % | / | / | / | / | ≥5.5(N) | / | / | 12~18 |
Bulk Density g/cm3 | 2.5~2.6 | 2.55~2.65 | 2.6~2.7 | ≥2.65 | ≥2.65 | ≥2.63 | ≥2.65 | ≥3.0 |
Apparent porosity % | ≤20 | ≤16 | ≤15 | ≤16 | ≤16 | ≤17 | ≤15 | ≤0.5 |
Flexural strength at room temperature MPa | ≥20 | ≥25 | ≥25 | ≥45 | ≥45 | ≥30 | ≥90 | ≥220 |
Flexural strength at high temperature MPa 1400℃ | / | / | / | ≥45 | ≥45 | ≥30 | ≥90 | ≥240 |
Cold Crushing strength MPa | ≥100 | ≥100 | ≥120 | ≥160 | ≥150 | ≥140 | ≥300 | ≥800 |
Features of silicon carbide bricks
- سنکنرن مزاحمت
- Slightly large
- Good thermal conductivity
- Strong impact resistance
- Low thermal expansion coefficient is a high-quality high-temperature resistant material
Application of silicon carbide brick
- Used in the metallurgical industry
In the metallurgical industry, it is mainly used in aluminum melting furnaces for aluminum alloy smelting, secondary tuyere bricks for blast furnaces, وغیرہ. - Used in the power industry
In the power industry, it is mainly used in boilers and is set at the nozzle of the boiler combustion chamber. - Used in the waste disposal industry
Silicon carbide bricks can also be used in waste incinerators
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