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Silica bricks for hot blast stove
Details
| Project | Prescribed value |
When retesting, the single value allows for deviation. |
|
| RG-95 | |||
| Chemical composition/% | SiO2 | ≥95 | －１ |
| Ａl2O3 | ≤1.0 | ＋０．１ | |
| Fe2O3 | ≤1.3 | ＋０．１ | |
| Apparent stomatal rate | ≤22(24) | ＋０．５ | |
| True density | ≤2.32 | ＋０．０１ | |
| Pressure strength at normal temperature | ≥45(35) | －１０（－７） | |
| Residual quartz／％ | ≤1.0 | － | |
| Load softening temperature（Ｔ0.6） | ≥1650 | 20 | |
| ≤0.8 | － | ||
| Creep rate（1000℃） | ≤1.25 | － | |
|
The values specified in the brackets in the column of the specified value and the allowable deviation of re-inspection are indicators of hand-formed bricks. If necessary, a thermal expansion curve from room temperature to 1200 °C can be provided. |
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