Silicon Nitride-Carborundum Fire Brick

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Product Description:

1. Characteristic

High strength

Low thermal expansion coefficient

Good thermal conductivity and thermal shock resistance

Good resistance to liquid aluminum erosion capability

High erosion

2. Applications

Widely used in large aluminum electrolytic cell of lining material. In the electrolytic aluminium industry, because of nitride bonded silicon carbide products can be made thin wall lining, enlarge the tank capacity, improve the thermal conductivity, can rapid cooling, and they are permitted to enter a higher power, increase the tank production capacity, at the same time, in its surface can form alumina and cryolite of eutectic content, in order to protect the tank lining work layer, prolong service life, therefore, this product is aluminum industry generally welcome.

3. Physical and Chemical Index of silicon nitride bonded silicon brick used in cooling stave  

SiC %72 Min
Si3N4 %21 Min
Fe2O3 % 0.5 Max
Porosity %18 Max
Bulk density g/cm32.65-2.70
Bending strength MPaRoom temperature °C42
1400 °C45
CCS MPa150 Min
Thermal conductivity w/m·k 1250 °C15-18
Tolerance0-100 mm±1.0
101-300 mm±1.5
301-500 mm±2.0
More than 500 mm±0.5%
Surface irregularity0.2 Max
Face verticality0.5 Max
Diagonal difference2 Max

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