SILICON NITRIDE BONDED SILICON CARBON BLOCK

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.  L&T selects high-quality SiC 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.
Inde\Bran L&T -SiC75 L&T -SiC72 L&T -SiC78 Guaranteeddate Typicaldate Guaranteeddate Typicaldate Guaranteeddate Typicaldate SiC (%) ≥73.0 74.2 ≥71.0 71.5 ≥78 78.5 Si3N4 (%) ≥21 22.5 ≥23 24.5 ≥18 19.0 Fe2O3 (%) ≤0.5 0.3 ≤0.5 0.4 ≤0.5 0.4 Apparent porosity (%) ≤16 15 ≤17 16 ≤18 17 Bulk density (g/cm3) ≥2.69 2.70 ≥2.60 2.64 ≥2.55 2.61 MOR(20℃,MPa) ≥50 55 ≥40 48 ≥45 52 HMOR(1400℃,MPa) ≥52 62 ≥48 52 ≥50 57 CCS (MPa) ≥150 180 ≥140 180 ≥120 160
CALCINED MAGNESITE
Customer Type Amperage of pots Locations Time Quantity(MT) Yichuan Power Group L&T -SiC75 300KAMP Sidewall 2001 1200 Xin’an Wanji Aluminium Co. L&T -SiC75 300KAMP Sidewall 2001 150 Guan Aluminium Co. L&T -SiC75 300KAMP Sidewall 2002 247 Guan Aluminium Co. L&T -SiC75 300KAMP Sidewall 2003 283 Henan Shenhuo Group L&T -SiC75 300KAMP Sidewall 2003 410