40% High Alumina Firebricks in Nairobi, Kenya.

40% High Alumina Firebricks in Nairobi, Kenya.
40% High Alumina Firebricks in Nairobi, Kenya.
  1. 40% High Alumina Firebricks in Nairobi, Kenya.
  2. 40% High Alumina Firebricks in Nairobi, Kenya.

High-density, medium-alumina refractory firebricks designed for high-heat industrial and commercial applications across Kenya and East Africa.

  • Operating Temperature: Up to 1,350°C

  • Composition: 38%–42% Alumina  (Al2O3)

  • Standard Dimensions: 230mm×115mm×75 mm (9″ × 4.5″ × 3″)

  • Key Features: Low thermal conductivity, strong thermal shock resistance, and acid slag resistance

  • Applications: Boilers, kilns, foundries, pizza ovens, and fireplaces

Product Description.

A 40% alumina firebrick is classified as a super-duty fireclay refractory brick. It balances high thermal resistance, mechanical strength, and cost-efficiency, making it a standard choice for industrial kilns, boilers, and thermal processing equipment.

Chemical Composition

The raw materials primarily consist of calcined bauxite and refractory fireclay:

  • Alumina (Al2O3 ): 38%-42%  (n0minal 40%)

  • Silica (siO2): 50%-56%

  • Iron Oxide (Fe2O3): < 2.0% – 3.0%

  • Minor Impurities (TiO2,CaO, Alkalis)

       Physical & Thermal Performance

    • Thermal Shock Resistance: Good tolerance to thermal cycling without cracking, spalling, or structural degradation.

    • Chemical Stability: High resistance to acidic slags and combustion gases.

    • Mechanical Strength: Robust load-bearing capabilities under continuous exposure to high temperatures.

    • Low Thermal conductivity: Firebricks reduces heat loss.

                Key Technical & Physical Specifications

    Parameter Specification Range Typical Value
    Max Service Temperature 1,300℃-1400℃  1,350℃
    Weight 4.2kgs 4.2kgs
    Bulk Density 2.10 – 2.30  g/cm^3 2.25  g/cm^3
    Apparent Porosity 15% – 20% 16.5%
    Cold Crushing Strength (CCS) 350-500kg/cm^2 (>35-50MPa)  450  kg/cm^2
    Refractoriness Under Load (RUL, Ta) 1300℃-1380℃ 1350℃
    Standard Dimensions 230mm×115mm×75mm 9″ ×4.5″ ×3″

    Common Applications

    1. Industrial Furnaces & Kilns: Interior linings for rotary cement kilns, boiler combustion chambers, reheat furnaces, and ceramic kilns.

    2. Foundries & Steelmaking: Used as safety backup linings in tundishes, ladles, and heat-treatment ovens.

    3. Incinerators & Chimneys: Flue gas ducts, waste incinerators, and high-temperature chimneys where corrosion resistance is essential.

    4. Commercial & Residential Units: Pizza ovens, bakeries, fireplaces, wood stoves, and barbecue pits requiring reliable thermal mass.

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