CUMIFRAC 90 (Silicon Carbide Rrefractories
Silicon Carbide Refractories (CUMIFRAC 90) 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.
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 | 1550 | 1550 |
| Bulk Density | 2.60 min. | 2.65 | |
| Apparent Porosity | % | 16.0 max. | 14.5 |
| Cold Crushing Strength | Kg/cm2 | 800 min. | 900 |
| Modulus of Rupture | |||
| At Room Temperature | Kg/cm2 | – | – |
| At 1250°C | Kg/cm2 | – | – |
| Thermal Conductivity At 1000°C Hot Face Temperature | W/m°K | – | – |
| Chemical Analysis | |||
| % | 90.0 min. | 91.05 | |
| Al2O3 | % | 3.0 max. | 2.55 |
| Fe2O3 | % | 0.95 max. | 0.80 |