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info@rsrefractories.comFused corundum bricks, Whose Alumina content is greater than 90%, are the hot selling which regard the corundum as the main crystalline phase. High normal temperature compressive strength (up to 340MPa). High load softening onset temperature (greater than 1700°C). Good chemical stability, strong resistance to acidic or alkaline slag, metal and glass. Thermal shock stability is related to its organizational structure. Dense products have good corrosion resistance but poor thermal shock stability. Divided into sintered corundum bricks and fused corundum bricks. Sintered alumina and fused corundum can be used as raw materials or alumina clinker with high ratio of Al2O3/SiO2 and sintered alumina respectively. Can also be made of phosphoric acid or other binders do not burn corundum brick.
| Items | Fused Cast Alumina | Fused Cast Alumina | Fused Cast Alumina | |
| α-β Alumina RS-M | α-Alumina RS-A | β-Alumina RS-H | ||
| Chemical Composition % | Al2O3 | 94 | 98.5 | 93 |
| SiO2 | 1 | 0.4 | - | |
| NaO2 | 4 | 0.9 | 6.5 | |
| Other oxides | 1 | 0.2 | 0.5 | |
| Crystallographic Analysis %
|
α-Al2O3 | 44 | 90 | - |
| β-Al2O3 | 55 | 4 | 99 | |
| Vitreous Phase | 1 | 6 | 1 | |
Fused corundum bricks are mainly used in key parts of industrial kilns that require wear resistance and high temperature resistance, such as slide rail bricks for steel pusher type metallurgical furnaces, steel taps for step-type heating furnaces, waste incinerator linings, petrochemicals Industry kiln lining, bottom of rolling mill, secondary converter of ammonia synthesis furnace.
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