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High-Quality Magnesium Iron Spinel Brick from China Suppliers & Factory for Cement Rotary Kiln Applications
Core Advantages
Superior High-Temperature Performance
Withstands continuous working temperatures up to 1790°C, maintains structural integrity under extreme heat without deformation, ensuring stable operation in high-temperature industrial processes.
Excellent Corrosion & Erosion Resistance
The spinel phase (MgO·Fe₂O₃) forms a dense protective layer, effectively resisting erosion from molten slag, alkali metals and corrosive gases in kilns and furnaces.
Strong Thermal Shock Stability
Low thermal expansion coefficient and high thermal conductivity reduce damage caused by rapid temperature changes, minimizing cracking and extending service life.
High Density & Mechanical Strength
Sintered at high temperature with advanced technology, the brick has low porosity (≤18%) resisting mechanical impact and wear during operation.
Product Parameters
| Item | Magnesia-Al Spinel Bricks | Magnesia-Ferro- Spinel Bricks | |||
|---|---|---|---|---|---|
| MgO % | 80 | 75 | 70 | 60 | 88 |
| Fe₂O₃ % | / | / | / | / | 4-5 |
| Al₂O₃ % | 12 | 12 | 12 | 18 | / |
| SiO₂ % | 1.0 | 1.0 | 1.5 | 1.0 | 1.2 |
| Apparent Porosity % | 18 | 18 | 18 | 18 | 18 |
| Bulk Density g/cm³ | 2.95 | 2.90 | 2.90 | 2.85 | 2.95 |
| Cold Crushing Strength MPa | 40 | 40 | 40 | 40 | 40 |
| Refractoriness Under Load ℃ | 1650 | 1650 | 1650 | 1650 | 1650 |
| Thermal shock stability (1100℃) | 40 | 40 | 40 | 40 | 40 |
Detailed Application Scenarios
1. Cement Industry
Used in the burning zone, transition zone and tertiary air duct of cement rotary kilns. Resists erosion from clinker, alkali and sulfur-containing gases.
2. Glass Industry
Applied to regenerator checkerwork, melting pool sidewall and bottom. Withstands corrosion from molten glass and ensures product transparency.
3. Non-Ferrous Metal Smelting
Ideal for lining blast furnaces and converters for copper, aluminum, and zinc. Resists erosion from molten metal and slag.
4. High-Temp Industrial Furnaces
Suitable for waste incineration boilers, petrochemical cracking furnaces, and ceramic kilns under harsh working environments.
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Frequently Asked Questions
What is the maximum working temperature of these bricks?
Our Magnesia Spinel bricks can withstand continuous working temperatures up to 1790°C without deformation.
What is the typical apparent porosity of the bricks?
The bricks are manufactured with a low apparent porosity of ≤18%, which helps in resisting mechanical impact and chemical wear.
In which industries are these refractory bricks most commonly used?
They are widely used in the cement industry (rotary kilns), glass industry (regenerators), and non-ferrous metal smelting (copper, aluminum, zinc).
How do these bricks handle rapid temperature changes?
They offer strong thermal shock stability, withstanding 1100°C cooling cycles up to 40 times due to their low thermal expansion coefficient.
What is the chemical composition of the MgO-Fe spinel bricks?
The Magnesia-Ferro-Spinel bricks typically contain approximately 88% MgO and 4-5% Fe₂O₃, forming a dense protective spinel phase.
Do these bricks resist alkali erosion?
Yes, the spinel phase (MgO·Fe₂O₃) effectively resists erosion from alkali metals, molten slag, and corrosive gases in industrial kilns.