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High-grade silica brick without calcium and zero expansion
Widely used in metallurgy, chemical industry, light industry. In the metallurgical industry, it is mainly used as an immersion nozzle in continuous casting and a carbonization chamber in coke ovens.
Classification:
Key words: refractory material
Product Details
1. main features:
1. Strong thermal shock resistance, stable chemical properties, SiO2Content greater than 99% corrosion resistance, excellent acid resistance.
2. Low Fe2O3The content is less than 0.1%, and there is no pollution to products (such as glass liquid, etc.).
3. Low flux index (Al2O3 2R2O) less than 0.3%, corrosion resistance, good high temperature resistance.
4. The thermal expansion rate is close to zero, and expansion joints may not be reserved during repair to increase the tightness of the masonry.
5. It is not easy to adhere to carbon under high temperature and long time use, and the corrosion resistance of molten steel is good.
6. Excellent thermal stability, thermal repair products will not burst, can not stop the furnace under the condition of high temperature, direct repair operations.
7. After repair (hot repair), there will be no peeling and other phenomena, long-term use is safe and reliable.
8. After masonry does not need to be baked for a long time; no preheating.
2. main purpose:
Widely used in metallurgy, chemical industry, light industry. In the metallurgical industry, it is mainly used as the submerged nozzle in continuous casting; the carbonization chamber in the coke oven and other parts. In the chemical industry, it is mainly used as the top of the glass furnace. Zero expansion silica brick because of its small expansion rate, thermal stability
High, high pressure strength and other characteristics, it is easy to make large blocks, and the surface is smooth without carbon deposition. In the United States and Canada and other countries of the coke oven door and gas rise pipe and other parts, has been widely used, its life than clay brick increased nearly 15 times.
Main technical indicators
| Project | Indicators |
| SiO2（%） | ≥99 |
| Al2O3（%） | ≤ 0.3 |
| Fe2O3（%） | ≤ 0.1 |
| High (%) | ≤ 0.1 |
| Bulk density (g/cm3) | ≥ 1.85 |
| Compressive strength (Mpa) | ≥ 35 |
| Aptly porosity (%) | ≤20 |
| Load softening temperature (T0.6 ,℃) | ≥ 1680 |
| Hot wire expansion rate (1000 ℃,%) | ≤ 0.2 |
| Thermal shock (1100 ℃, water-cooled, times) | ≥30 |
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