Fused Magnesia (FM)Fused magnesia is manufactured by fusing high‑grade magnesite or caustic calcined magnesia in electric arc furnace above 2200‑2400 ℃, followed by cooling, crushing and sizing.It owns large periclase crystals, extremely dense structure, low porosity, excellent slag corrosion resistance and superior thermal shock resistance.
Key Features：
- Large periclase crystals and dense microstructure with low apparent porosity, higher bulk density than dead burned magnesia (DBM).
- Ultra high refractoriness, melting point around 2800℃, maintains high mechanical strength at elevated temperatures.
- Outstanding slag corrosion resistance against basic slags and molten metals, widely used for high-grade magnesia carbon bricks.
- Good thermal shock resistance, resistant to cracking and spalling under rapid temperature changes.
- Excellent chemical inertness, stable against acid and alkali corrosion.
- Superior electrical insulation property for high-temperature electrical insulation applications.
- High mechanical strength and abrasion resistance, withstand severe scouring in metallurgical furnaces.
Available Grades：
Fused Magnesite (1:1)
Fused Magnesite (CaO/SiO2 2:1min)
Fused Magnesite (Large Crystal)
Main Applications：
‑ Raw material for high‑end shaped refractories: magnesia‑carbon bricks and other premium basic bricks.
‑ High‑quality aggregate for advanced magnesia‑based monolithic refractories (castables, ramming masses).
‑ Critical high‑temperature zones for EAF, steel ladles, glass kilns and non‑ferrous furnaces; also used for electrical insulating materials.
Available Sizes & Packing：
Standard sizes:0‑1mm,1‑3mm,3‑5mm,5‑8mm and fine powder.
Sizes can be customized upon request.
Packing: 1/1.25 MT ton bags, 25 kg bags or on request.
COA certificate provided per batch.
Specification:
Chemical Composition | Fused Magnesite (1:1) |
| FM-96 | FM-97 | FM-97.5 | FM-98 |
MgO | 96.00% min | 97.00% min | 97.50% min | 97.90% min |
SiO₂ | 1.5% max | 1.1% max | 0.80% max | 0.70% max |
CaO | 1.80% max | 1.40% max | 1.00% max | 1.00% max |
Fe₂O₃ | 1.20% max | 0.90% max | 0.80% max | 0.70% max |
Al₂O₃ | 0.40% max | 0.30% max | 0.25% max | 0.25% max |
LOI | 0.30% max | 0.20% max | 0.20% max | 0.20% max |
Bulk Density | 3.42g/cm³ min | 3.45g/cm³ min | 3.48g/cm³ min | 3.50g/cm³ min |
Chemical Composition | Fused Magnesite (CaO/SiO2 2:1min) |
| FM-96 | FM-97 | FM-97.5 | FM-97.7 | FM-98 |
MgO | 96.00% min | 97.00% min | 97.50% min | 97.70% min | 97.90% min |
SiO₂ | 1.10% max | 0.80% max | 0.70% max | 0.60% max | 0.500% max |
CaO | 2.2% max | 1.60% max | 1.40% max | 1.20% max | 1.00% max |
Fe₂O₃ | 1.00% max | 0.80% max | 0.65% max | 0.60% max | 0.50% max |
Al₂O₃ | 0.40% max | 0.20% max | 0.20% max | 0.15% max | 0.15% max |
LOI | 0.30% max | 0.30% max | 0.20% max | 0.20% max | 0.20% max |
Bulk Density | 3.40g/cm³ min | 3.42g/cm³ min | 3.45g/cm³ min | 3.48g/cm³ min | 3.50g/cm³ min |
Chemical Composition | Fused Magnesite (Large Crystal) |
| LC-97 color mix | LC-97 color white | LC-975 color mix | LC-975 color white | LC-98 | LC-985 | LC-99 |
MgO | 97.00% min | 97.00% min | 97.50% min | 97.50% min | 98.00% min | 98.50% min | 99.00% min |
SiO₂ | 0.75% max | 0.75% max | 0.70% max | 0.70% max | 0.60% max | 0.40% max | 0.20% max |
CaO | 1.5% max | 1.5% max | 1.4% max | 1.4% max | 1.2% max | 0.8% max | 0.4% max |
Fe₂O₃ | 0.75% max | 0.75% max | 0.70% max | 0.60% max | 0.50% max | 0.50% max | 0.20% max |
Al₂O₃ | 0.20% max | 0.20% max | 0.18% max | 0.18% max | 0.15% max | 0.15% max | 0.10% max |
LOI | 0.20% max | 0.20% max | 0.20% max | 0.20% max | 0.15% max | 0.15% max | 0.10% max |
Bulk Density | 3.4g/cm³ min | 3.42g/cm³ min | 3.45g/cm³ min | 3.47g/cm³ min | 3.48g/cm³ min | 3.5g/cm³ min | 3.5g/cm³ min |
*Specifications and Sizes can be customized upon request.
Available Sizes & Packing：
Standard sizes:0‑1mm,1‑3mm,3‑5mm,5‑8mm and fine powder.
Sizes can be customized upon request.
Packing: 1/1.25 MT ton bags, 25 kg bags or on request.
COA certificate provided per batch.