Refractory BricksMagnesia and basic bricks
Magnesia Brick
Basic refractory brick with strong resistance to alkaline slag, high refractoriness and high refractoriness under load, in seven grades from M89 to M98.
- Grades / types
- 7 grades, M98 to M89
Product overview
Magnesia brick is a basic refractory material. It has strong resistance to alkaline slag, high refractoriness and a high refractoriness under load.
Key characteristics
- Basic refractory material
- Strong resistance to alkaline slag
- High refractoriness
- High refractoriness under load
Technical data
| Property | Unit | M98 | M97A | M97B | M95A | M95B | M91 | M89 |
|---|---|---|---|---|---|---|---|---|
| MgO | % | ≥97.5 | ≥97 | ≥96.5 | ≥95 | ≥94.5 | ≥91 | ≥89 |
| SiO₂ | % | ≤1.0 | ≤1.2 | ≤1.5 | ≤2.0 | ≤2.5 | — | — |
| CaO | % | — | — | — | ≤2.0 | ≤2.0 | ≤3.0 | ≤3.0 |
| Apparent Porosity | % | ≤16 | ≤16 | ≤18 | ≤16 | ≤18 | ≤18 | ≤20 |
| Bulk Density | g/cm³ | ≥3.0 | ≥3.0 | ≥3.0 | ≥2.95 | ≥2.95 | ≥2.9 | ≥2.85 |
| Cold Crushing Strength (CCS) | MPa | ≥60 | ≥60 | ≥60 | ≥60 | ≥60 | ≥60 | ≥50 |
| Refractoriness Under Load, 0.2 MPa (RUL) | ℃ | ≥1700 | ≥1700 | ≥1700 | ≥1650 | ≥1650 | ≥1560 | ≥1500 |
| Permanent Linear Change (PLC) | % | -0.2~0 (1650℃×2h) | -0.2~0 (1650℃×2h) | -0.2~0 (1650℃×2h) | -0.3~0 (1650℃×2h) | -0.3~0 (1650℃×2h) | -0.5~0 (1600℃×2h) | -0.6~0 (1600℃×2h) |
Where Refractories Are Used
Industry
Steel & Iron
Refractories in iron and steel production are used in the blast furnace, hot blast stove, cast house and coke oven on the ironmaking side, and in the hot metal ladle, converter, electric arc furnace, steel ladle, tundish, RH degasser and reheating furnace on the steelmaking side. Material selection varies by operating zone and includes silica, high alumina, magnesia, magnesia-carbon, alumina-silicon carbide-carbon and silicon carbide products together with castables, ramming mixes and mortars.
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Nonferrous Metals
Refractories for nonferrous metals divide into two groups. For aluminium they line the electrolysis cell side wall, corners and bottom, the smelter and the holding furnace, using silicon nitride bonded silicon carbide, carbon-based materials, low cement and non-stick castables and insulation. For copper, zinc, lead and nickel they are magnesia-chrome bricks in directly bonded, semi-rebonded and fused rebonded types.
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Glass
Refractories in the glass industry line the melting tank, the superstructure, the working end and forehearth, the throat and the regenerator. Different furnace types take different materials, in fused, siliceous and magnesia groups: silica, clay, high alumina, sillimanite, mullite, fused mullite, zirconia-corundum, fused corundum and zirconium-containing refractory bricks.
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Available grades, shapes and sizes
Available grades
- M98
- M97A
- M97B
- M95A
- M95B
- M91
- M89
Related solutions
Services that work with this family of materials.
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Technical Consultation
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