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Technical Data of 70% Alumina |
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JAY AL - 70% is dense, low porosity, 70% Alumina
Brick based on Refractory grade bauxite calcined in Rotary kiln with
excellent resistance to spalling, corrosive slags and hot metals,
Successful applications in Burning zone linings of Tunnel Kiln and Hot
Air Generators, Electric Arc Furnace Roof Steel Teeming Laddles,
Induction Furnace, Sugar Mills, Chemical Plants and many others.
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 Chemical Analysis |
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Alumina Al2O3 |
68.0 - 73.0 % |
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Silica SiO2 |
19.0 - 25.0 % |
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Ferric - Oxide Fe2O3 |
2.80 - 3.20 % |
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Titania TiO2 |
3.40 - 3.90 % |
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Calcia CaO |
1.50 - 2.00 % |
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Physical Properties |
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Pyrometric Cone Equivalent, Ortron |
Min. 36 (1805°C) |
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Reheat change - at 1400°C
- 2Hrs, |
Max. (+/-)2.5% |
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Refractories under Load -
ta Value |
1430°C - 1480°C |
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Spalling Test, Water quench - 1300C |
Min 10 Cycle |
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Apparent Porosity, |
19.0 - 22.0% |
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Bulk Density, gm/cm3 |
2.65 - 2.75 |
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Cold Crushing, Strength, kg/cm² |
Min. 500 |
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Thermal Conuctivity, W/Mok at 700°C |
1.60 |
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Thermal Conuctivity, W/Mok at 900°C |
1.65 |
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IMPORTANT NOTE :-
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| THE ABOVE TEST DATA are based on average results of Control tests on dry pressed
standard size bricks and are subject to normal variation on individual tests, hence
these results should not be regarded as absolute limits. |
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