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Magnesia Alumina Spinel Refractory Brick

Magnesia Alumina Spinel Refractory Brick is a high-performance refractory product engineered for extreme thermal environments. Combining magnesia, alumina, and spinel, it boasts exceptional resistance to high temperatures, thermal shock, slag erosion, and mechanical wear. Ideal for key components in industries like steelmaking (converters, ladles), non-ferrous metallurgy, cement production (kilns), and glass manufacturing (furnaces), this brick ensures prolonged service life and enhanced operational efficiency of industrial kilns and furnaces.

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Description

1. Product Composition and Structure

Main Components: Composed of high-purity magnesia (MgO), alumina (Al₂O₃), and spinel (MgAl₂O₄). The spinel phase is generated through in-situ reaction during sintering, which optimizes the brick's microstructure.

Microstructure: Features a dense structure with well-distributed phases, minimizing the penetration of molten slag and improving corrosion resistance.

2. Outstanding Performance Characteristics

High-Temperature Resistance: Can withstand operating temperatures up to 1800℃, maintaining structural stability in extreme heat.

Thermal Shock Resistance: Exhibits excellent resistance to rapid temperature changes, reducing the risk of cracking and spalling during start-stop or process fluctuations.

Slag Erosion Resistance: The combination of magnesia and spinel phases forms a strong barrier against corrosive slags in steelmaking, cement, and other metallurgical processes.

Mechanical Strength: Retains high compressive and flexural strength at elevated temperatures, ensuring durability under load.

3. Application Scenarios

Steelmaking Industry: Lining of converters, ladles, tundishes, and electric arc furnaces, where it resists intense heat and steel/slag erosion.

Non-Ferrous Metallurgy: Used in smelting furnaces for copper, aluminum, and other non-ferrous metals, coping with corrosive molten metals and slags.

Cement Industry: Kiln linings, especially in the burning zone, where it endures high temperatures and alkaline cement clinker erosion.

Glass Industry: Furnace crowns and sidewalls, withstanding high temperatures and glass melt corrosion.

4. Product Advantages

Extended Service Life: Reduces maintenance frequency and downtime of kilns/furnaces, lowering overall operating costs.

Energy Efficiency: The low thermal conductivity helps retain heat, contributing to energy savings in heating processes.

Customization Options: Available in various sizes, shapes, and compositions to meet specific requirements of different industrial applications.

5. Technical Specifications

Parameter	Index
MgO Content	≥70%
Al₂O₃ Content	15 - 25%
Bulk Density	≥3.0 g/cm³
Apparent Porosity	≤12%
Cold Crushing Strength	≥60 MPa
Refractoriness	≥1790℃

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