DESCRIPTION: Keratuff is a structural refractory insulation. Insulation materials are normally only usable as a backing or with some kind of structural support. Keratuff has sufficient strength to be a free standing structure.
APPLICATIONS: Precast pizza oven roofs, crucible furnace lids, heat shields, splash boards, aluminium launders, burner shields.
MAXIMUM SERVICE TEMPERATURE: 1200°C. Keratuff melts between 1200°C
and 1300°C. Shrinkage at 1200°C is 1,7%.
DENSITY: 1,0 dry, 0,85 fired.
STRENGTH: 23MPa at 110°C, 6MPa fired 1200°c.
COMPOSITION: Contains Litefill and Hollofill synthetic aggregates, and
zirconia containing ceramic fibres. 53/o alumina.
PREPARATION: Add +40 to +50% water to the powder, mix well and apply it. It can be vibration cast at +40% water, +50% is easier to apply by trowelling. Water content is not critical and need not be measured. Extensive mixing and trowelling improves the fibre dispersion and improves strength. All particles are less than 1mm diameter. Setting time is about one hour.
PACKAGING: 10Kg in thick polythene bags.
PILOT PLANT CODE: OEV.