Fused Rebonded Magnesia Chrome Bricks from Xintai Refractory are premium-grade refractory products manufactured using electro-fused magnesia-chrome spinel as the main raw material. The material is melted, cooled, crushed, and then formed by high-pressure molding followed by high-temperature sintering. This advanced process provides excellent slag and steel penetration resistance, outstanding structural stability, and a long service life in harsh industrial environments. The performance of fused rebonded magnesia chrome bricks positions them between fused cast and traditional sintered magnesia chrome bricks, making them a strong solution for applications requiring high thermal shock resistance, strength, and wear performance.
Technical Specifications
| Item / Grade | MGe-16A | MGe-16B | MGe-12A | MGe-12B | MGe-8A | MGe-8B |
|---|---|---|---|---|---|---|
| MgO, % ≥ | 50 | 45 | 60 | 55 | 65 | 60 |
| Cr₂O₃, % ≥ | 16 | 16 | 12 | 12 | 8 | 8 |
| Apparent Porosity, % ≤ | 19 | 22 | 19 | 21 | 19 | 21 |
| Cold Crushing Strength, MPa ≥ | 35 | 25 | 35 | 30 | 35 | 30 |
| 0.2MPa Refractoriness Under Load, °C ≥ | 1650 | 1550 | 1650 | 1550 | 1650 | 1530 |
Key Features
• High corrosion and erosion resistance against hot steel and slag
• High load softening temperature up to 1700°C
• Dense microstructure with low porosity
• Strong thermal shock resistance and structural stability
• Improved service life compared to ordinary magnesia chrome bricks
• Manufactured with high-purity chromite and fused magnesia for enhanced chemical properties
• Suitable for high-temperature furnaces with demanding service conditions
Typical Applications
Fused Rebonded Magnesia Chrome Bricks are widely used in metallurgical and high-temperature industrial furnaces, including:
• RH vacuum refining furnaces (especially lower tank and critical zones)
• Steel ladles and secondary refining equipment
• Non-ferrous smelting furnaces
• Cement rotary kilns and transition zones
• Glass furnaces and other high-temperature industrial units
The product is particularly suitable for environments exposed to molten steel flow, severe temperature fluctuations, and continuous slag-steel erosion.
Production Details
These bricks are produced using a fused rebonded process:
Raw Material Synthesis – Magnesia and chrome materials are melted in an electric arc furnace to produce fused spinel with high Cr₂O₃ and purity.
Breaking & Grading – Solidified fused materials are crushed and graded into specific grain sizes.
High-Pressure Forming – Granules are pressed into brick shape with optimized density.
High-Temperature Sintering – Bricks are fired at elevated temperatures to achieve direct bonding and excellent mechanical strength.
This process enhances the corrosion resistance, dimensional stability, and high-temperature load performance required in modern steelmaking operations.
Packing and Shipping Details
• Standard export fumigation-free wooden pallets
• Plastic film and corner protection to avoid abrasion
• Individual labels and traceable batch marking
• Global shipping available by sea, land, or multimodal transport
• Custom packaging options provided upon request
Frequently Asked Questions (FAQ)
Q1: What makes fused rebonded magnesia chrome bricks different from ordinary magnesia chrome bricks?
They use fused spinel as the main component and are sintered after high-pressure forming, providing lower porosity, higher slag resistance, and higher load softening temperature.
Q2: What is the typical service temperature?
The load softening temperature can reach about 1700°C, making the bricks suitable for continuous high-temperature industrial service.
Q3. Which industries commonly use this product?
Mainly steelmaking (especially RH refining units), non-ferrous smelting, cement kilns, glass furnaces, and other high-temperature installations.
Q4: Can you customize size, density, or chemical composition?
Yes. Dimensions, proportions of MgO/Cr₂O₃, physical indexes, and shape designs can all be customized based on customer operating conditions.
Q5: Do you provide technical support for installation and selection?
Yes, we offer professional guidance in material selection, technical parameters, and furnace lining optimization to ensure stable performance and extended service life.
