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High Alumina Refractory Bricks from China Factory - Top Suppliers for Industrial Furnace Applications
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High Alumina Refractory Bricks from China Factory - Top Suppliers for Industrial Furnace Applications

High alumina bricks, primarily composed of alumina (Al2Oand other essential materials, are specially engineered for high-temperature applications such as furnaces, kilns, and reactors. Sourced from top China suppliers, these refractory bricks are manufactured using bauxite as the main raw material. The production process involves sorting and sieving the clinker to eliminate impurities, followed by high-temperature firing to ensure durability and performance, Our factory employs advanced techniques to mix raw materials, including bauxite and other high-alumina minerals, shaping them meticulously into bricks, and firing them at elevated temperatures. The incorporation of various additives and binders in the manufacturing process enhances the desired properties, making high alumina bricks ideal for extreme environments, When you choose high alumina bricks from our China factory, you invest in reliable materials that are critical for many high-temperature industrial applications, ensuring both efficiency and longevity

    Features

    High Alumina Brick introductiongs2
    1. High Refractoriness They can withstand very high temperatures, making them suitable for use in furnaces and other high-temperature environments.
    2. Excellent Thermal Stability These bricks maintain their structural integrity and mechanical properties even under rapid temperature changes, reducing the risk of thermal shock damage.
    3. Good Insulating Properties While not as effective as specialized insulating materials, high alumina bricks offer some insulation against heat transfer, helping to conserve energy in industrial applications.
    4. Resistance to Corrosion and Abrasion They are resistant to chemical corrosion and mechanical wear, prolonging their lifespan in harsh operating conditions.
    5. Low Thermal Conductivity This property helps to minimize heat loss and maintain consistent temperature profiles within the refractory lining.

    Overall, high alumina bricks are valued for their durability, reliability, and ability to withstand extreme conditions in various industrial processes.

    Application

    High alumina bricks are commonly used in industries such as steel, cement, glass, and ceramics for their ability to withstand extreme temperatures and harsh conditions. Masonry blast furnace, hot blast stove, electric furnace top and ladle permanent lining.

    Main physical and chemical performance index

    Index LZ-75 LZ-65 LZ-55 LZ-48
    Al2O3 % ≥ 75 65 55 48
    Refractoriness ℃ ≥ 1790 1790 1770 1750
    Refractoriness under load (0.6%) ℃ ≥ 1520 1500 1470 1420
    Permanent linear change (1500℃×2h) % +0.1~-0.4 +0.1~-0.4 +0.1~-0.4 +0.1~-0.4 (1450℃)
    Apparent porosity % 23 23 22 22
    CCS MPa ≥ 53.9 49 44.1 39.2

    Frequently Asked Questions

    What are the main features of high alumina bricks?
    High alumina bricks offer high refractoriness, excellent thermal stability, good insulating properties, resistance to corrosion and abrasion, and low thermal conductivity.
    What applications are high alumina bricks used for?
    They are widely used in steel, cement, glass, and ceramics industries, specifically for masonry blast furnaces, hot blast stoves, electric furnace tops, and ladle permanent linings.
    What is the refractoriness limit for LZ-75 high alumina bricks?
    LZ-75 high alumina bricks have a refractoriness rating of ≥ 1790 ℃, allowing them to withstand extreme high-temperature environments.
    How do high alumina bricks perform under rapid temperature changes?
    They possess excellent thermal stability, which helps maintain their structural integrity and mechanical properties, significantly reducing the risk of thermal shock damage.
    What is the Al2O3 percentage in different grades of these bricks?
    The Al2O3 percentage varies by grade: LZ-75 contains ≥ 75%, LZ-65 contains ≥ 65%, LZ-55 contains ≥ 55%, and LZ-48 contains ≥ 48%.