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.

Brands Oralite - 4 Oralite - 7 Oralite - 9 Oralite - 11 Oralite - 13 Oralite - 15

Chemical Analysis

Al2O 3 % min 30 33 33 34 39 39 Fe2O3 max 11 8.5 6 3.5 3.5 3.2

Physical Properties

Services Temp ºC 1000 1100 1200 1300 1350 1350 Bulk Density gms/cc 0.55 0.85 1 1.25 1.45 1.60 Water required for casting, % 80 - 100 60 - 65 38 - 43 29 - 34 26 - 31 23 - 28 Grain Size, mm 6 6 6 6 6 6.00

Cold Crushing Strength, Kgs / cm2

at 110ºC / 24hrs. 4 12 15 35 50 90  at 800 ºC / 3 hrs. 2 4 6 25 30 60    at 1100 Cº / 3 hrs. - 6 - 25 30 60    at 1300 C º/ 3 hrs. - - - 40 50 70

Thermal Properties

PLC, %

after heating at 800ºC / 3 hrs (+)(-) 0.4 (+)(-) 0.8 (+)(-) 0.6 (+)(-) 0.3 (+)(-) 0.2 (+)(-) 0.2 after heating at 1000ºC / 3 hrs (+)(-) 0.6 (+)(-) 1.20 - - - - after heating at 1200ºC / 3 hrs - - (+)(-) 1.0 - - - after heating at 1300ºC / 3 hrs - - - (+)(-) 1.0 (+)(-) 0.8 (+)(-) 1.0

Thermal Conductivity,Kcal/mhr/ºC

at 300ºC HF 0.07 0.15 0.24 0.27 0.3 0.39 at 500ºC HF 0.09 0.17 0.26 0.30 0.32 0.42 at 800ºC HF 0.12 0.19 0.28 0.32 0.35 0.45

Packaging : 25 Kgs Bags

Storage Life: 9 Months water proof weather conditions.

The above data represents typical average properties and does not constitute a specification.