Table 2 Technical data of high thermal conductivity silica brick and ordinary coke oven silica brick
Item | High thermal conductivity silica brick | Ordinary silica brick |
Apparent porosity /% | 16.8 | 22 |
True density /(g · cm-3) | 2.323 | 2.330 |
Cold compressive strength /MPa | 75.5 | 40 |
Refractoriness under load (0.2 MPa, 0.6%) /℃ | 1 664 | 1 650 |
Thermal conductivity rate (1 100 ℃) /(W · m-1 · K-1) | 2.65 | 1.90 |
Thermal expansion rate (1 000 ℃) /% | 1.22 | 1.25 |
Residual quartz /mass% | 0.41 | 0.55 |
SiO2 /mass% | 95.48 | 95.15 |
Al2O3 /mass% | 0.79 | 0.81 |
Fe2O3 /mass% | 0.65 | 0.68 |
CaO /mass% | 2.38 | 2.4 |