Magnesia spinel brick is a new type of basic refractory material. This type of brick is mainly composed of magnesium oxide and aluminum oxide. It has high refractoriness and is suitable for harsh environments. Kerui is the manufacturer. We offer factory prices, various brick types, and customized services.
- MgO: ≥80%;
- Al2O3: ≥3-10%;
- Bulk density: ≥2.9g/cm3;
- Apparent Porosity: ≤17%;
- Standard size: 230*114*65mm (standard)/And other sizes;
Types of Magnesia Spinel Bricks
Kerui magnesite spinel bricks are mainly divided into two types: Magnesia alumina spinel bricks and magnesia spinel bricks. Let’s take a look at the perameters of these two types of refractory bricks.
Type 1. Magnesia Alumina Spinel Type
| Item | Index | |
|---|---|---|
| MgO, % | ≥ | 80 |
| Al2O3, % | ≥ | 10 |
| Apparent Porosity, % | ≤ | 17 |
| Bulk Density, g/cm³ | ≥ | 2.9 |
| Cold Crushing Strength, MPa | ≥ | 50 |
| High-temperature Bending Strength (1350℃*0.5h), MPa | ≥ | 3.5 |
| Thermal Shock Resistances (1100℃, Water Cooling), Cycle | ≥ | 12 |
Type 2. Magnesia Iron Spinel Type
| Item | MFe-85A | MFe-85B | |
|---|---|---|---|
| MgO, % | ≥ | 85 | 85 |
| Al2O3, % | ≥ | 3-5 | 3-5 |
| Fe2O3, % | ≥ | 4-6 | 4-6 |
| Bulk Density, g/cm³ | ≥ | 2.95 | 2.90 |
| Cold Crushing Strength, MPa | ≥ | 55 | 50 |
| 0.2MPa Refractoriness Under Load, ℃ | ≥ | 1650 | 1600 |
High-Quality Quality Control for Kerui Magnesia Spinel Refractory Bricks
- High-Purity Raw Materials: Kerui uses high-quality magnesia, bauxite, and synthetic spinel for production.
- Advanced Firing Process: An automated temperature control system in factory ensures the production of high-quality, highly dense bricks.
- Precise Dimensions: Kerui’s pressing and grinding processes ensure that the final products meet standard specifications.
- Professional Reports: Kerui Refractory can provide third-party reports on composition and other details based on customer requirements.
Selecting the Suitable Size of Spinel Fire Brick
Kerui offers standard sizes and shapes. The standard size is 230*114*65mm. In addition, thicker sizes are also available in stock.
The standard shapes include straight, curved, axe-shaped, wedge-shaped, arch bricks, and so on. Moreover, Kerui provides customized special-shaped bricks. We can customize brick shapes based on your drawings.
Kerui Spinel Refractory Bricks Are Applied Worldwide
Up to now, Kerui has shipped magnesia-spinel bricks to countries such as South Korea, Egypt, Russia, Saudi Arabia, Turkey, etc. Customers have been highly satisfied with our products and continue to collaborate with us for long-term partnerships and mutual success. Together, we tackle the challenges of high-temperature industries.
Applications of Spinel Fire Bricks
- Cement Rotary Kilns: Magnesia-iron spinel bricks are better suitable for the burning zones of cement rotary kilns. Their excellent resistance to slag erosion and kiln coating formation can effectively extend the service life of kiln linings and reduce the frequency of shutdown for maintenance.
- Glass Furnaces: Both magnesia-alumina spinel type and magnesia-iron spinel type can be used. However, for areas exposed to alkaline slags, magnesia iron spinel type offers greater advantages.
- Steel Industry: The uses of magnesia alumina spinel type is for ladle linings, while the magnesia iron spinel type is better for specific areas of furnace linings.
- Other High-Temperature Industries: Kerui technicians will give you suitable proposals.
Comparison of Two Kinds of Magnesia Spinel Firebricks
| Property | Magnesia Aluminous Spinel Brick | Magnesia Iron Spinel Brick | Tips |
|---|---|---|---|
| Composition | MgO-Al₂O₃ system | MgO-Al₂O₃-Fe₂O₃ system | The addition of iron oxide affects the lattice constant, reducing the density of the material. |
| Refractoriness | High, generally above 1900℃ | High, slightly lower than magnesia-alumina spinel brick | The addition of iron oxide slightly reduces the refractoriness. |
| Thermal Shock Resistance | Excellent | Good | The addition of iron oxide may slightly reduce thermal shock resistance. |
| Slag Resistance | Good | Excellent | Iron oxide reacts with basic slag to form low-melting-point compounds, enhancing slag resistance. |
| Oxidation Resistance | Good | Excellent | The presence of iron oxide improves the oxidation resistance of the material. |
| Thermal Conductivity | Low | Low | Both have low thermal conductivity, providing good thermal insulation. |
| Volume Stability | Good | Good | Excellent volume stability at high temperatures. |
| Mechanical Strength | High | Relatively low | The addition of iron oxide may slightly reduce mechanical strength. |
| Cost | Relatively high | Relatively low | Iron oxide raw materials are relatively low in cost. |
| Spalling Resistance | General | Excellent | Iron oxide reacts with slag to form a viscous substance, enhancing spalling resistance. |
| Color | White or light gray | Dark gray or black | The presence of iron oxide makes the material darker. |
Kerui is Your Magnesia Spinel Brick Manufacturer and Supplier
- Direct Production Factory;
- Comprehensive Technical Support;
- Overall Supporting Product Packaging Solution;
- Customized Packaging;
- Optimal Transportation Routes;
- High Product and Service Satisfaction;
- After-Sales Technical Support and Construction Guidance;
- Industrial Certificates and International Certificates;
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