Pyro-Fold

Oralite are a range of insulating Castables to conserve heat in furnaces. They are light but strong and have low conductivity, serve as either hot face or back up insulating refractory lining. These Castables are produced in density range of 400 to 1600 kg/m3. They are available mainly in two different grades medium purity and high purity. The high purity (Low Iron) variety is suitable for reducing environments.

Physical Propertires HP Grade ZR Grade CR Grade Denka
Color White White Blue/Green White
Continuous Use Limit, °F (°C) 2200 (1204) 2450 (1343) 2500 (1371) 2912 (1600)
Classification Temperature Rating, °F (°C) 2400 (1316) 2600 (1427) 2600 (1427) 2912 (1600)
Density, pcf (kg/m3 ) 8, 9.3, 10.7 (128, 149, 171) 8, 9.3, 10.7 (128, 149, 171) 9.3, 10.7 (149, 171) 8, 9.3 (128, 149)
Chemical Analysis, % weight basis after firing
Alumina, Al2O3 46 35 43 80
Silica, SiO2 54 50 54 20
Zirconia, ZrO2 - 15 - -
Chromia, Cr2O3 - - 3 -
Other trace trace Trace Trace
Thermal Conductivity, BTU•in./hr•ft2 •°F (W/m•k), ASTM C 201
Measured density, pcf (kg/m3 ) 9.3 (149)
Mean temperature @ 500°F (260°C) 0.52 (0.07) 0.74 (0.11)
@ 1000°F (538°C) 1.00 (0.14) 1.31 (0.19)
@ 1500°F (816°C) 1.66 (0.24) 2.36 (0.34)
@ 2000°F (1093°C) 2.45 (0.35) 3.66 (0.53)
@ 2500°F (1371°C) - 5.05 (0.73)
@ 2700°F (1482°C) - 5.61 (0.81)
Standard Size Availability
Thickness, in (mm) 4 – 12 (102 - 305)
Length x Width, in (mm) 12 x 12 (305 x 305)