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Corundum fire-resistant production
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Corundum materials are characterized with a high degree of heat-resistant stability to corrosion, erosion and out-splitting and consequently are a fire-resistant material of new generation and are used in glass-manufacturing and cement furnaces, heaters of steel-pouring ladles, furnaces of melting of nonferrous metals, heat-technical equipment of various chemical manufactures.
Titanium-corundum ring sleeve of a feeder of glass mass and the titanic ring, making a nutritious trench of glass-manufacture furnaces, are characterized by stability to corrosion and erosion of glass mass.
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Chemical compound and physical parameters
| Parameters | Designation | CMC | The Product |
| Corundum brick | Chrome-corundum brick | Titanium-corundum brick |
| Ñ90 | Ñ95 | Ñ98 | ÑÑ12 | ÒÑ |
| Al2O3 ≥ | % | 85 | 90 | 95 | 98 | 73 | 94 |
| F2O3 ≤ | % | 0.5 | 0.8 | 0.6 | 0.4 | 1.0 | 0.4 |
| Cr2O3 ≥ | % | - | - | - | - | 12 | (TiO2)1.0 |
| Porosity ≤ | % | 20 | 20 | 20 | 20 | 20 | 2 |
| Poured density | g/cm3 | 2.8 | 3.0 | 3.05 | 3.1 | 3.0 | 3.6 |
| Limit of strength at compression at low temperatures ≥ | MPa | 40 | 80 | 80 | 80 | 50 | 300 |
| Fire resistance under loading ≥ | °Ñ | 1500 | 1700 | 1700 | >1700 | 1700 | 1650 |
| Linear change at repeated heating | 1550°Ñõ2h | % | - | ±0.3 | ±0.2 | - | - | ±0.2 |
| 1600°Ñõ2h | % | - | - | - | ±0.2 | ±0.2 | - |
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