With high thermal strength and conductivity, excellent oxidation resistance, excellent Cryolite melt and liquid aluminum resistance, high resistivity and low thermal expansion, Si3N4 bonded SiC block has become the most ideal sidewall lining for aluminum reduction cell, which can increase the effective volume of reduction cell, raise the electric load, improve the output and prolong the service life of reduction cell.
We select high-quality SiC as raw-material and silicon fine powder as starting materials, assisting with perfect grain size distribution and optimum nitrifying-sintered processes to produce Si3N4- SiC block, so this block features good appearance, accurate dimensions, homogenous micro-structure and excellent comprehensive performance, which has been used in thousands of aluminum reduction cells and tens of large-volume blast furnaces in the world.
--Properties of Si3N4-SiC Blocks
|
ITEM |
CM-SiC75 |
CM-SiC72 |
||
|
Guaranteed value |
Typical value |
Guaranteed value |
Typical value |
|
|
SiC (%) |
≥72.0 |
74.2 |
≥71.0 |
71.5 |
|
Si3N4 (%) |
≥21 |
22.5 |
≥23 |
24.5 |
|
Fe2O3 (%) |
≤0.5 |
0.3 |
≤0.5 |
0.4 |
|
Apparent porosity (%) |
≤16 |
15 |
≤17 |
16 |
|
Bulk density (g/cc) |
≥2.65 |
2.68 |
≥2.60 |
2.64 |
|
MOR(20℃,MPa) |
≥45 |
55 |
≥40 |
48 |
|
HMOR(1400℃,MPa) |
≥50 |
62 |
≥45 |
52 |
|
CCS (MPa) |
≥150 |
180 |
≥140 |
180 |