CUMIFRAC M (Silicon Carbide Rrefractories

Silicon Carbide Refractories (CUMIFRAC M) are produced from silicon carbide, a raw material synthesized in a resistance-type electric furnace at temperature exceeding 2500°C, through the reaction of silica with carbon. They have a thermal conductivity 10 times that of fireclay refractories, good corrosion and thermal shock resistance, and can be formed into complex shapes. They can withstand attack and flame erosion. This makes CUMIFRAC unusual even among advanced refractories and has given it wide uses.

 

cumifrac image

industries

  • H.T. Insulators / Ceramics
  • Sanitaryware
  • Ferro Alloys
  • Foundries, Forge Plants, Powder metallurgy

features

  • Extremely high thermal conductivity
  • Very high hot strength
  • High erosion and abrasion resistance
  • Thermal shock resistance
  • Chemical inertness

application

  • Kiln furniture
  • Muffles and chamber fronts
  • Taphole linings
  • Heat treatment furnace hearth

Properties

Properties UNIT Limit Value Typical Value
Maximum Hot Face Temperature °C 1500 1500
Bulk Density gm/cc 2.50 min. 2.55
Apparent Porosity % 18.0 max. 16.0
Cold Crushing Strength Kg/cm2 700 min. 850
Modulus of Rupture      
At Room Temperature Kg/cm2 175 min. 180
At 1250°C Kg/cm2 100 min. 125
Thermal Conductivity At 1000°C Hot Face Temperature W/m°K 15.0 min 15.7
Chemical Analysis      
SiC % 82.0 min. 85.38
Al2O3 % 1.0 max 0.60
Fe2O3 % 1.0 max. 0.64