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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
ITEM | INDEX | |||||||
SiC % | 72 Min | |||||||
Si3N4 % | 21 Min | |||||||
Fe2O3 % | 0.5 Max | |||||||
Porosity % | 18 Max | |||||||
Bulk density g/cm3 | 2.65-2.70 | |||||||
Bending strength MPa | Room temperature °C | 42 | ||||||
1400 °C | 45 | |||||||
CCS MPa | 150 Min | |||||||
Thermal conductivity w/m·k 1250 °C | 15-18 | |||||||
Tolerance | 0-100 mm | ±1.0 | ||||||
101-300 mm | ±1.5 | |||||||
301-500 mm | ±2.0 | |||||||
More than 500 mm | ±0.5% | |||||||
Surface irregularity | 0.2 Max | |||||||
Face verticality | 0.5 Max | |||||||
Diagonal difference | 2 Max |