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The main function of hot repair material is to ensure the normal operation of the blast furnace under the premise of the blast furnace iron outlet ditch in the hot condition of rapid repair, to extend the service life of the main ditch. It is characterized by high toughness, good thermal shock, good resistance to slag iron erosion and good resistance to scouring.
Technical Parameters
Testing Program | Physical and chemical indicators | Typical value | Inspection Standards | |
chemical composition (%) | Al₂O₃ | ≥55 | 56.8 | GB/T 16555 |
SiC | ≥9 | 9.9 | ||
bulk density (g/cm³) | 110℃×24h | ≥2.65 | 2.79 | YB/T 5200 |
1450℃×3h | ≥2.55 | 2.75 | ||
linear rate of change (%) | 1450℃×3h | ±0.5 | +0.24 | YB/T 5203 |
flexural strength (Mpa) | 110℃×24h | ≥3.0 | 3.6 | YB/T 5201 |
1100℃×3h | ≥4.0 | 6.2 | ||
compressive strength (Mpa) | 110℃×24h | ≥20 | 22.4 | YB/T 5201 |
1100℃×3h | ≥35 | 37.1 | ||
