Introduction
Chromite flour, derived from high-grade chromite ore with a typical Cr₂O₃ content of 46% or higher, is a critical raw material in the production of magnesium chrome refractory bricks. These refractories are widely used in high-temperature industrial applications due to their excellent thermal stability, corrosion resistance, and mechanical strength.
Our chromite flour is carefully processed to ensure optimal grain size distribution, chemical purity, and consistency, making it an ideal choice for refractory manufacturers seeking superior performance in harsh environments.
Key Properties & Specifications
1. Chemical Composition
- Cr₂O₃: ≥46%
- Fe₂O₃: ≤20%
- SiO₂: ≤5%
- Al₂O₃: ≤10%
- MgO: ≤15%
- CaO: ≤1%
- LOI (Loss on Ignition): ≤1%
The balanced Cr/Fe ratio (typically ≥2.5) ensures excellent refractory performance, while low silica and alkali content enhance thermal stability.
2. Physical Characteristics
- Particle Size: Customizable (typically 200 mesh, 325 mesh, or finer for refractory applications)
- Bulk Density: ~3.8–4.2 g/cm³
- Melting Point: ~2,180°C (depending on composition)
- Color: Dark brown to black
Applications in Magnesium Chrome Refractories
1. Magnesia-Chrome Bricks (MgO-Cr₂O₃)
Chromite flour is a key component in direct-bonded and rebonded magnesia-chrome bricks, which are widely used in:
- Steelmaking furnaces (EAF, AOD, ladles)
- Copper smelting converters
- Cement rotary kilns
- Non-ferrous metal processing furnaces
The addition of chromite flour improves:
✔ Thermal shock resistance
✔ Slag corrosion resistance (especially against basic slags)
✔ High-temperature strength
2. Chrome-Containing Castables & Monolithics
Chromite flour is also used in:
- Refractory castables for ladle linings
- Gunning mixes for furnace repairs
- Plastic refractories for kiln patching
Its fine particle size ensures good workability and bonding with magnesia or alumina matrices.
Advantages of Our Chromite Flour
✅ High Purity – Low impurities (SiO₂, CaO, alkalis) minimize unwanted reactions in refractory systems.
✅ Controlled Particle Size – Optimized for maximum packing density and sintering performance.
✅ Consistent Quality – Strict quality control ensures batch-to-batch uniformity.
✅ Cost-Effective – Enhances refractory lifespan, reducing maintenance costs in high-temperature applications.
Conclusion
Chromite flour is an essential material for producing high-performance magnesia-chrome refractories, offering superior resistance to thermal stress, chemical corrosion, and mechanical wear. Our product meets the stringent requirements of modern refractory manufacturing, ensuring durability in extreme industrial environments.
For customized particle sizes or technical specifications, please contact us for further details
