Typical application
C1215Z is mainly used in the critical high-wear areas of reinforcement and textile fiber glass furnaces including :
- melter sidewalls, bottom paving and dog house corners,
- forehearth and feeder side rails, flow blocks, bushing blocks and corner blocks.
The specific microstructure is designed to increase the thermal shock resistance for minimize cracking risk during furnace heat-up and operation. The inherent refractoriness of Cr2O3 combined with high density results in a refractory with excellent corrosion resistance against a wide variety of molten glasses and slags.
Chemical and physical properties
Microstructure
Image
Typical chemical composition
Typical crystallographic analysis
Main phase: chromic oxide
Secondary phase: monoclinic zirconia
Physical characteristics
| Description | International standards | British standards |
|---|---|---|
| Cold modulus of rupture | 41Mpa | 5,947psi |
| Cold crushing strength | 240Mpa | 34,809psi |
| Coefficient of thermal expansion | 7.8 10-6K-1 | 4.3 10-6°F-1 |
| Thermal shock resistance | fair | fair |
| Thermal conductivity at 1,000°C | 3.3 W.m-1.K-1 |
22.8 BTU |
| Open porosity | 15% | 15% |
| Typical bulk density | 4.33g/cm3 | 270pcf |
Storage
The sintered dense high chrome, C1215Z solution must be properly stored in undamaged original sealed packaging, in dry conditions at temperatures between +5°C and +40°C.