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Iron runners of blast furnace commonly use castables as lining. This product is made of corundum, silicon carbide, carbon-containing materials and ultra-low cement. It has the advantages of fast drying, bursting resistance, anti-slag erosion, scouring resistance, oxidation resistance, long service life, fast and easy construction and so on.
Item | Quick-drying castables for the main iron runner | Free baking ramming mass for iron runner | Tapping breast castable | Freeboard castable for iron ladle | |
Al2O3 (%) ≥ | 70 | 85 | 45 | 70 | |
SiC+C (%) ≥ | 12 | 8-12 | 8 | 15 | |
Bulk Density (g/cm3) ≥ | 110℃×24h | 2.90 | 2.75 | 2.50 | 2.75 |
Modulus of Rupture(MPa) ≥ | 110℃×24h | 6 | 8 | 6 | 5 |
1500℃×3h | 8 | 12 | 8 | 8 | |
Cold Crushing Strength (MPa) ≥ | 110℃×24h | 20 | 45 | 25 | 35 |
1500℃×3h | 30 | 50 | 35 | 40 | |
Reheating Linear Change (%) | 1500℃×3h | -0.3~+0.4 | -0.3~+0.3 | -0.3~+0.3 | -0.3~+0.3 |
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