Zhengzhou RongSheng Kiln Refractory CO,. LTD
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Features:
Resistance to High temperature, Resistance to erosion, resistance to abrasion;
Excellent compression strength;
Resistance to acid and alkali;
Excellent heat stability.
Application:
The high alumina bricks are widely applied to industrial furnace, glass furnace, chemical industrial furnace, utility industry furnace lining, smelting furnace, and heat insulation ventilation wall.
Properties of High Alumina Brick:
Al2O3 (%) | ≥60 | ≥70 | ≥75 | 78-80 |
SIO2 (%) | 32 | 22 | 20 | ≥18 |
Fe2O3 (%) | ≤1.7 | ≤2.0 | ≤1.8 | ≤1.8 |
Na2O+K2O(%) | <2.3 | <2.0 | <1.2 | |
Refractoriness | 1790 | >1770 | >1790 | ≥1790 |
refractoriness under load 0.2mpa(°C) | 1450 | >1510 | >1520 | ≥1520 |
Porosity (%) | 22 | <22 | <21 | 20 |
Bulk density(g/cm3) | 2.33 | 2.43-2.48 | 2.45-2.55 | 2.55 |
Cold Cushing strength (Mpa) | ≥45 | ≥50 | ≥54 | ≥60 |
Thermal expansion at 1000°C (%) | ≤0.3 | ≤0.3 | ≤0.3 | ≤0.3 |
Reheating shrinking change(%) 1500°CX24h | -0.3 | -0.3 | -0.3 | -0.3 |