Magnesia Iron Spinel Bricks are high-performance refractory products specially designed for cement rotary kilns and other severe high-temperature industrial environments. Manufactured using high-purity magnesia and hercynite spinel raw materials, these bricks offer excellent structural flexibility, thermal shock resistance, and alkali corrosion resistance.
Compared with traditional magnesia chrome bricks, magnesia iron spinel bricks provide environmentally friendly performance without chromium pollution while maintaining excellent durability and kiln coating performance. Their low thermal conductivity and strong resistance to chemical penetration help reduce heat loss and extend kiln service life.
These refractory bricks are ideal for modern dry-process cement kilns and other industrial furnaces operating under harsh thermal and chemical conditions.
Physicochemical Parameters
| Items | MFe-88 | MFe-85A | MFe-85B |
|---|---|---|---|
| MgO (%) | 88 | 85 | 85 |
| Fe₂O₃ (%) | 5–6 | 4–6 | 4–6 |
| Al₂O₃ (%) | 4–7 | 3–5 | 3–5 |
| SiO₂ (%) | ≤1.5 | ≤2 | ≤2 |
| Bulk Density (g/cm³) | ≥2.9 | ≥2.95 | ≥2.90 |
| Apparent Porosity (%) | 16 | 17 | 17 |
| Cold Crushing Strength (MPa) | ≥55 | ≥55 | ≥50 |
| Refractoriness Under Load (°C) | ≥1650 | ≥1650 | ≥1600 |
| Thermal Shock Stability | ≥8 | ≥6 | ≥6 |
| Thermal Conductivity (W/m·K) | ≤2.6 | ≤2.6 | ≤2.6 |
| Thermal Expansion (%) | ≤1.7 | ≤1.6 | ≤1.6 |
Product Features
- Excellent Coating Adherence: Forms stable kiln coating layers that protect kiln linings and improve operational stability.
- Superior Thermal Shock Resistance: Maintains structural integrity under repeated temperature fluctuations and rapid cooling conditions.
- Low Thermal Conductivity: Helps reduce heat loss and improve thermal efficiency in high-temperature kilns.
- Strong Alkali Corrosion Resistance: Effectively resists alkali salts such as K₂SO₄, Na₂SO₄, NaCl, and KCl generated during cement production.
- High Mechanical Strength: Stable structure with excellent compressive strength for long-term kiln operation.
- Strong Penetration Resistance: Dense structure prevents slag and chemical infiltration, extending service life.
Applications
Magnesia iron spinel bricks are suitable for various high-temperature industrial furnaces, including:
- Cement rotary kiln firing zones
- Lime vertical kilns
- Glass melting furnaces
- Industrial heat treatment furnaces
- Metallurgical furnaces
- Circulating fluidized bed furnaces
- High-temperature combustion chambers
Customization Services
We provide customized refractory solutions according to different furnace structures and operating conditions.
- Sizes: Whether you need standard dimensions or custom sizes, we can manufacture high alumina bricks to meet your specific furnace or kiln needs.
- Shapes: We offer various shapes, such as arch bricks, anchor bricks, checker bricks, and more, designed to fit specific applications in different industrial furnaces and kilns.
- Colors: Custom colors are available to match your furnace design or aesthetic preferences.
With our extensive experience in producing high-quality refractory materials, we can provide the best solution tailored to your exact specifications.
Packing and Shipping Details
Xintai magnesia iron spinel bricks are securely packed to ensure safe transportation and delivery worldwide.
- Packaging: Wooden pallets with moisture-proof plastic wrapping
- Protection: Corner reinforcement and anti-damage packaging
- Shipping Methods: Sea freight, land transportation, or customized logistics solutions
- Delivery Time: Typically 20–35 working days depending on order quantity and customization requirements
- Export Service: Complete export documentation support available
About Xintai Refractory
Xintai Refractory is a professional refractory materials manufacturer with over 20 years of industry experience. We specialize in producing high-quality refractory bricks, insulating bricks, castables, and monolithic refractories for industries including cement, steel, glass, ceramics, non-ferrous metals, and power generation.
With advanced production technology, strict quality control, and global export experience, Xintai provides reliable, energy-efficient, and cost-effective refractory solutions for demanding high-temperature applications worldwide.
Contact Xintai Refractory today for customized refractory solutions, technical consultation, or a free quotation.
