Fireplaces Magnesia Alumina Spinel Brick Al2o3 Fire Resistant Brick
Magnesia high alumina spinel brick al2o3 fire resistant brick used for fireplaces with cheap price
1. Made by bauxite clinker and binder through Crushing, Mixing, Shaping, Drying and high temperature Sintering.
2. Al2O3 content is 48%-80%,main mineral components are corundum and mullite phases.
3. Refractoriness is above 1770°C, refractoriness under load is 1420-1550°C.
4. Working temperature:1350°C -1650°C.
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Material name
Item |
Silicon Brick | Silicon Mo red brick | Magnesium iron spinel brick | |||||||
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SX- 1680T |
SX- 1650T |
SX- 1550T |
SX- Ⅰ |
SX- Ⅱ |
SX- H |
SX-MFe -80 |
SX-MFe -85 |
SX-MFe -90 |
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Chemical composition(%) |
AL2O3 (%)≥ | 65 | 65 | 63 | 67 | 65 | 69 | |||
| SiO2 +SiC≥ | 30 | 30 | 31 | 30 | 30 | 25 | ||||
| SiO2 (%)≤ | 2.0 | 1.0 | 1.5 | |||||||
| MgO | -- | -- | -- | 80 | 85 | 90 | ||||
| Fe2O3 (%)≤ | 7.5 | 7.5 | 4.5 | |||||||
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Apparent porosity(℃) |
1790 | 1790 | 1790 | |||||||
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Bulk density (g/cm3)≥ |
2.66 | 2.65 | 2.60 | 2.7 | 2.7 | 2.75 | 2.90 | 3.00 | 2.85 | |
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Apparent porosity(%)≤ |
17 | 17 | 17 | 17 | 17 | 16 | ||||
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Cold crushing strength (Mpa)≥ |
90 | 95 | 90 | 100 | 90 | 100 | 45 | 50 | 50 | |
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Refractoriness under load T0.6 (℃)≥ |
1680 | 1650 | 1550 | 1650 | 1630 | 1660 | 1550 | 1600 | 1650 | |
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Thermal shock resistances (1100℃water, cycle )≥ |
12 | 10 | 10 | 15 | 12 | 18 | 80 | 100 | 80 | |
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Normal Temp (cm3)≤ |
8.5 | 8.2 | - | |||||||
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(1000℃)(W/m·k)≤ Thermal conductivity coefficient |
2.0 | 2.3 | 2.4 | 1.7 | 1.7 | 1.7 | 2.6 | 2.6 | 2.6 | |
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(1400℃)(%) Thermal expansion |
1.6 | 1.6 | 1.7 | |||||||
Magnesia Bricks Description
Our company's magnesium-aluminum spinel series products are currently widely used in lime kilns. This series of products has the advantages of good thermal stability, good slag resistance and strong corrosion resistance. This product replaces magnesia-chrome bricks and magnesia bricks in key parts of lime kilns, and has achieved good results.
Magnesia Bricks Features:
It is a kind of alkaline refractory product with periclase as main phase magnesite-alumina spinel clinker as basic material. the product has such characteristics as good temperature vibration, good strength and volume stablity in high temperature.
Magnesia Bricks Application
Basic open-hearth furnace for steelmaking
Electric furnace bottom and wall
Permanent lining of oxygen converter
Non-ferrous metal metallurgy furnace
Hyperthermia tunnel kiln
Lining of rotary cement kiln
Heating furnace bottom and wall
Regenerative chamber of glass furnace
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