Dead Burnt Magnesite
High-density sintered periclase mineral with extreme refractoriness and slag resistance for steel ladle linings, tundishes, and furnace ramming masses.
Product Overview: Dead Burnt Magnesite (DBM)
Dead Burnt Magnesite (DBM), also termed Sintered Magnesia, is produced by sintering high-purity natural magnesite at extreme temperatures (> 1750°C) in high-temperature shaft and rotary kilns.
This thermal sintering completes recrystallization into unreactive periclase crystal grains, delivering exceptional bulk density (≥ 3.20 g/cm³), extreme chemical inertness, and superior resistance to corrosive basic slags in steel furnaces and cement rotary kilns.
Key Benefits
Resists Thermal Spalling
Periclase crystal structure withstands severe thermal cycling inside electric arc furnaces and steel ladles.
High Slag Corrosion Resistance
Neutralizes corrosive iron oxide and basic slag attacks, dramatically extending furnace lining campaign life.
Ideal for Ramming & Guniting
High density grains deliver tight particle packing and mechanical strength in EAF hearth patching and tundish coatings.
Superior Hot Strength
Maintains modulus of rupture at temperatures exceeding 1400°C without premature softening.
Virtually Zero Shrinkage
Fully sintered structure prevents volumetric shrinkage and joint cracking during high-heat operations.
Applications
Steel Ladle & Tundish Linings
EAF Bottom Ramming Mass
Magnesite-Carbon (MgO-C) Bricks
Cement Rotary Kiln Burning Zone
Technical Specifications
| Parameter | Premium DBM-97 | Refractory DBM-92 | Refractory DBM-90 | Sintered DBM-88 | Utility DBM-85 |
|---|---|---|---|---|---|
| MgO Content | 97.2% | 92.5% | 90.2% | 88.0% | 85.2% |
| Silica (SiO2) | 0.8% | 2.5% | 3.5% | 4.5% | 6.0% |
| Iron Oxide (Fe2O3) | 0.6% | 1.2% | 1.5% | 2.0% | 2.8% |
| Calcium Oxide (CaO) | 0.9% | 1.8% | 2.2% | 2.8% | 3.5% |
| Alumina (Al2O3) | 0.25% | 0.45% | 0.65% | 0.85% | 1.20% |
| Bulk Density | 3.25 g/cm3 | 3.18 g/cm3 | 3.12 g/cm3 | 3.05 g/cm3 | 2.95 g/cm3 |
| Apparent Porosity | < 3.5% | < 4.0% | < 4.5% | < 5.0% | < 6.5% |
| Size Specification | 0-1 / 1-3mm | 0-1 / 1-3mm | 0-6mm | 0-6mm | Coarse |
Why Choose Us?
High-Heat Kiln Sintering
Processed at verified temperatures above 1750°C to guarantee complete crystal conversion.
Narrow Particle Sizing
Supplied in calibrated grain sizes (0–1mm, 1–3mm, 3–5mm, 0–5mm) and 200 Mesh fines for optimal packing.
Certified Bulk Density
Regular pycnometer testing ensuring consistent high density without micro-porosity.
Bulk Bag Packing
Supplied in 1.0 MT and 1.25 MT heavy-duty UV-stabilized jumbo bags with discharge spouts.