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Silica Brick
Description
Silica Brick using high quality silica as the main raw material,add all kinds of additives, after forming and drying, then through the length of more than 159m tunnel kiln, in 1580 degrees above the high temperature calcined from. According to the different application kilns, it can be divided into coke oven silicon brick, hot blast furnace silicon brick and glass kiln silicon brick.
Silica brick for coke oven is made of quartzite as high-quality raw materials, belonging to crystal silica with dense and homogeneous structure, high purity, which is an ideal raw material for coke oven silica brick. This product has low true density, low residual quartz(<1%),low thermal expansion, high content of tridymite. It is very convenient for laying because of uniform configuration and precise measurement. This product is widely used in any parts of coke oven.
Silica brick for hot blast sotve has low thermal linear expansion, low residual quartz, low true density, good thermal shock resistance above 600℃,high refractoriness under load, precise measurement etc., mainly used for the high temperature parts such as roof of hot stove, upper walls and checkers etc..
The high-quality silica bricks for glass furnace are characterized by high silica content. low flux index, widely used in the upper part such as vault, breast wall, curtain wall, port and crown for regenerator for glass furnace.
Technical parameters:
Silica brick for hot blast sotve has low thermal linear expansion, low residual quartz, low true density, good thermal shock resistance above 600℃,high refractoriness under load, precise measurement etc., mainly used for the high temperature parts such as roof of hot stove, upper walls and checkers etc..
The high-quality silica bricks for glass furnace are characterized by high silica content. low flux index, widely used in the upper part such as vault, breast wall, curtain wall, port and crown for regenerator for glass furnace.
Technical parameters:
| Item | Silica brick for coke oven |
Silica brick for hot blast stove |
Silica brick for glass furnace |
||
| LJG-94 | LJG-95 | LRG-95 | LBG-96A | LBG-96B | |
| SiO2 % ≥ | 94 | 95 | 95 | 96 | 96 |
| Al2O3 % ≥ | 1.2 | 1.0 | － | - | - |
| Fe2O3 % | 1.3 | 1.2 | － | 1.0 | 0.8 |
| Refractoriness under load 0.2MPa ℃ ≥ |
1650 | 1650 | 1660 | 1680 | 1680 |
| Linear change after heating,(1450℃×2h),% | +0.2 | +0.2 | +0.2 | - | - |
| Apparent porosity,% ≤ | 24 | 24 | 22 | 22 | 22 |
| Cold crushing strength , ≥ MPa | 30 | 35 | 35 | 35 | 35 |
| True density , ≤ g/cm3 | 2.34 | 2.33 | 2.34 | 2.34 | 2.34 |
| Residual quartz , %≤ | 1 | 1 | 1 | - | - |
| Thermal expansion（1000℃）% ≤ | 1.25 | 1.25 | 1.25 | - | - |
| Creep rate 0.2MPa （1500℃×50h）% ≤ | － | － | 0.3 | - | - |
| Flux index(Al2O3+2R2O),%≤ | - | - | - | 0.5 | 0.7 |
In addition to the products described above, we can also produce according to your technical requirements to meet the use of various kiln silica brick conditions.
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