Refractoriness (℃): | 1580< Refractoriness< 1770 |
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Feature: | Long Time Materials |
Type: | Refractory Material |
Shape: | Powder |
Material: | Castable |
Al2O3: | 55% |
Samples: |
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Customization: |
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High-aluminium castable material characteristics
1, good performance of high temperature resistance, high temperature environment does not fall off, high strength.
2, add alumina superfine powder after good wear resistance, good resistance to acid and alkali erosion performance.
3, high strength, resistant to material scouring, strength is 2-3 times of building bricks and blocks.
4, patented scientific formula to make the castables high temperature strength and thermal stability to further improve, and effective control of calcium oxide content, high load softening temperature, long service life, construction and other characteristics of easy to improve heat preservation, reduce heat loss, reduce the ambient operating temperature has a significant effect!
Item Indicator Grade |
corundum | corundum - high alumina | High Aluminium | Clay |
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DG-90 | DGL-80 | DG-70 | DG-60 | DG-50 | DN-40 | ||
Chemical composition (%) | Al2O3 CaO |
≥90 ≤2.5 |
≥80 ≤2.5 |
≥70 ≤2.5 |
≥60 ≤2.5 |
≥50 ≤2.5 |
≥40 ≤2.5 |
Bulk density kg/m³ | 110°C×16h 1500°C×3h |
≥2.95 ≤2.9 |
≥2.75 ≤2.7 |
≥2.64 ≤2.6 |
≥2.5 ≤2.45* |
≥2.4 ≤2.4* |
≥2.3 ≤2.3** |
Flexural strength MPa | 110°C×16h 1500°C×3h |
≥8 ≤10 |
≥7 ≤10 |
≥6 ≥10 |
≥6 ≥8* |
≥6 ≥8* |
≥6 ≥8** |
Linear change rate after firing % | 110°C×16h 1500°C×3h |
-0.1 -0.5 |
-0.1 -0.5 |
-0.1 ±0.5 |
0.1 ±0.5 |
0.1 ±0.5 |
0.1 ±0.5 |
Compressive strength MPa | 110°C×16h 1500°C×3h |
≥60 ≥80 |
≥45 ≥75 |
≥45 ≥70 |
≥40 ≥60* |
≥40 ≥60* |
≥4 ≥60* |
Use temperature °C | 1650-1700 | 1600 | 1500 | 1450 | 1400 | 1350 |
High alumina castables are used in heating furnaces, coupled-heat furnaces, heat treatment furnaces, rotary kilns; all kinds of high-temperature burner linings, heating furnace water pipe winding linings, high-temperature wear-resistant linings of steel furnace external refining device components and petrochemical catalytic cracking reactors; lining of blast furnace iron discharge grooves, iron discharge tanks, iron pretreatment powder spray guns and so on. It can also be used to manufacture large prefabricated blocks and furnace linings.
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