Insulating Fire Bricks-VITCAS Grade 28 -2800°F/ 1530°C

VITCAS Grade 28 Insulating Fire Bricks – High Temperature Refractory Insulation 1530°C

VITCAS Grade 28 Insulating Fire Bricks are lightweight refractory insulation bricks designed for high-temperature applications up to 1530°C (2800°F). Manufactured with a controlled porous structure, they provide effective thermal insulation and low heat storage compared with conventional dense fireclay bricks. Their low thermal conductivity makes them suitable for ceramic kilns, industrial furnaces and other high-temperature equipment requiring refractory insulation.

Grade 28 insulating firebricks have a density of approximately 900 kg/m³ and measure 230 × 114 × 76 mm. Their low iron content is particularly beneficial in ceramic firing applications where contamination from refractory materials must be minimised.

Key Features

• High Temperature Resistance: Rated to 1530°C (2800°F) for demanding refractory insulation applications.
• Low Thermal Conductivity: Helps reduce heat transfer through furnace and kiln linings.
• Lightweight, Porous Structure: Provides effective thermal insulation with reduced heat storage compared with dense refractory bricks.
• Low Thermal Mass: Suitable for equipment requiring relatively rapid heating and cooling cycles.
• Low Iron Content: Helps minimise the risk of iron-related contamination in suitable ceramic firing processes.
• Density: Approximately 900 kg/m³.
• Dimensions: 230 × 114 × 76 mm (9 × 4½ × 3 inches).

Recommended Setting Material

VITCAS Vitset 45 Refractory Mortar is recommended for setting Grade 28 insulating fire bricks in suitable high-temperature refractory installations.

Typical Applications

Ceramic Kilns

• High-Temperature Kiln Linings: Suitable for refractory insulation in kilns used for pottery, ceramic tiles and other fired ceramic products.
• Low Thermal Mass: Reduces the amount of heat stored in the refractory lining compared with dense fireclay bricks, making it suitable for kilns requiring shorter heating and cooling cycles.
• Low Iron Content: Beneficial in ceramic firing applications where limiting iron contamination is important.

Back-Up Refractory Insulation

• Industrial Furnaces and Kilns: Secondary insulation behind primary refractory linings to reduce heat transfer.
• Treatment Vessels: Back-up insulation in appropriately designed high-temperature processing equipment.

Glass and Enamel Furnaces

• Non-Contact Areas: Suitable for refractory insulation in areas of glass and enamel furnaces that are not in direct contact with molten materials.
• Thermal Insulation: Helps limit heat loss through suitable furnace linings while maintaining the required high-temperature resistance.

Important: Grade 28 insulating fire bricks should not be used in direct contact with molten glass or other molten materials unless specifically approved for the application. Suitability depends on operating temperature, furnace atmosphere, mechanical loading and overall refractory lining design.