Magnesia Iron Spinel Brick
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Product Introduction
Magnesia iron spinel brick is a high-performance chrome-free basic refractory material developed by Zhengzhou Jinshan Refractory. It is produced using high-purity magnesia and pre-synthesized magnesia-iron spinel as main raw materials. This product offers outstanding kiln coating formation, strong thermal shock resistance, and excellent corrosion resistance against cement clinker and alkali salts.
It serves as an ideal chrome-free alternative to traditional magnesia-chrome bricks, particularly suitable for the burning zone of cement rotary kilns. Jinshan magnesia iron spinel bricks provide superior coating adhesion while maintaining structural integrity under high thermochemical loads, effectively extending service life and reducing environmental impact.
Key Performance Highlights
- MgO: ≥87-91%
- Fe₂O₃: 4-6%
- Bulk Density: ≥2.95-3.05 g/cm³
- Cold Crushing Strength: ≥55-60 MPa
- Refractoriness Under Load: ≥1650℃
- Thermal Shock Resistance: Excellent coating + good spalling resistance
Product Features
- Superior Kiln Coating Formation
Excellent ability to form a thick, stable, and protective kiln coating with cement clinker, significantly reducing direct exposure to chemical attack and mechanical wear. - Strong Thermal Shock Resistance
Optimized spinel structure effectively absorbs thermal stress, providing good resistance to rapid temperature fluctuations common in rotary kilns. - Excellent Corrosion & Erosion Resistance
High resistance to cement clinker, alkali vapors (K₂SO₄, Na₂SO₄), and other corrosive compounds, with minimal penetration and material loss. - Chrome-Free & Environmentally Friendly
Completely free of chromium, eliminating hexavalent chromium pollution risks and meeting strict international environmental regulations. - Low Thermal Conductivity & Good Structural Flexibility
Lower heat conductivity helps reduce energy consumption, while the elastic structure improves resistance to mechanical stress and over-heating damage.
Technical Specifications
Item | Index | Unit |
|---|---|---|
MgO | ≥88 | % |
Fe₂O₃ | 4-6 | % |
Al₂O₃ | ≤5 | % |
Apparent Porosity | ≤16 | % |
Bulk Density | ≥2.95 | g/cm³ |
Cold Crushing Strength | ≥55 | MPa |
Refractoriness Under Load (0.2MPa) | ≥1650 | ℃ |
Permanent Linear Change (1500℃×2h) | -0.3 ~ +0.3 | % |
Thermal Shock Resistance | Good | cycles |
Thermal Conductivity (1000℃) | ≤2.8 | W/m·K |
Custom specifications and brick shapes available upon request.
Production Process
Jinshan Refractory ensures premium quality through strict process control:
- High-Quality Raw Materials: Selected high-purity fused magnesia and pre-synthesized magnesia-iron spinel with low impurities.
- Precise Batching & Mixing: Computer-controlled system for accurate proportioning and uniform mixing.
- High-Pressure Molding: Large-tonnage presses to achieve high green density and uniform structure.
- High-Temperature Sintering: Fired at 1650–1750℃ in controlled atmosphere tunnel kilns to develop stable spinel phases.
- Rigorous Quality Control: Each batch is tested for chemical composition, physical properties, and dimensional accuracy.
Main Applications
- Cement Industry: Burning zone, transition zone, and other high-temperature areas of rotary kilns (especially with alternative fuels).
- Steel Industry: Ladle linings and other basic refractory positions requiring good coating and corrosion resistance.
- Other High-Temperature Kilns: Incinerators and furnaces needing strong alkali/slag resistance and thermal stability.
Why Choose Jinshan Magnesia Iron Spinel Bricks?
- Longer Service Life: Superior coating protection reduces wear and extends kiln running time.
- Energy Efficiency: Low thermal conductivity helps lower fuel consumption.
- Environmentally Compliant: Chrome-free design supports sustainable production.
- Technical Support: Customized solutions, brick shape design, and on-site installation guidance.
Why Choose Zhengzhou Jinshan Refractory?
With more than 20 years of expertise in basic refractories, Jinshan Refractory combines advanced manufacturing technology with a strong R&D team. We deliver not only high-quality magnesia iron spinel bricks but also comprehensive technical solutions for cement and steel plants worldwide.
Ready to Improve Your Kiln Performance?
Contact our technical team today for professional refractory solutions, detailed quotations, and customized product recommendations.
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Magnesia Iron Spinel Brick
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Phone:+86-15936268068
Email:zzjsrefractory@gmail.com
Address: Chengguan Industrial Zone, Xinmi City, Henan Province
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