Lightly calcined magnesia (light-burned magnesia) and dead burned magnesia are both produced from magnesite, but they differ significantly in calcination temperature, physical properties, chemical reactivity, and applications.
| البند | Lightly Calcined Magnesia (Light-burned MgO) | Dead Burned Magnesia (DBM) |
|---|---|---|
| Calcination Temperature | 700–1000℃ | 1500–2000℃ |
| Main Purpose | Remove crystal water and CO₂, decompose magnesite to produce high-activity MgO | High-temperature sintering to reduce reactivity, increase density, and improve refractoriness |
| Appearance | White or light yellow powder | Gray-white or gray-yellow blocks or granules |
| Property | Lightly Calcined Magnesia | Dead Burned Magnesia |
|---|---|---|
| Activity | High (>40% citric acid activity) | Low (<5% citric acid activity) |
| Hardness | Softer, easy to grind | Very hard, high density |
| الكثافة السائبة | 1.0–2.0 g/cm³ | 3.3–3.45 g/cm³ |
| Chemical Stability | Lower, easily reacts with water and acids | Very high, excellent resistance to acids, alkalis, and high-temperature corrosion |
Lightly Calcined Magnesia:
Production of magnesia-based cementitious materials (magnesium oxychloride cement, magnesium oxysulfate cement)
Desulfurization agent (steelmaking, flue gas desulfurization)
Rubber, plastics, chemical additives, and feed additives
Environmental absorbent materials (heavy metal removal, wastewater treatment)
Dead Burned Magnesia:
Production of magnesia-based refractory materials (magnesia bricks, magnesia-carbon bricks, magnesia-chrome bricks)
High-temperature furnace linings (ladles, converters, electric arc furnaces)
Manufacture of high-purity fused magnesia, magnesia-based refractory castables
High-temperature metallurgical protective coatings
One-sentence memory tip:
Light-burned magnesia has low calcination temperature, high reactivity, and is used in chemicals and building materials; dead burned magnesia has high calcination temperature, low reactivity, and is used in refractories.
KERUI Refractory supplies different types of sintered magnesium و fused magnesium. If you have any needs, please contact us to get the best quotation.