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High temperature castables: it's made from the mixture of sand, high temperature aggregate, high temperature cement and water It is used for the hot repair of working layer of stack lower parts and belly.
Characteristics:
1,Good construction liquidity
2,Better cohesiveness and expansibility
3,LT early strength, strength increasing from low to high temperature
4,Good density of construction
5,Storage period to some extent
Items | Index | NO. | |||||||||
SHF-200 | HF-160 | HF-135 | HF-130 | ||||||||
Chemcial composition(%) | Al2O3 | >80 | >75 | >65 | >60 | ||||||
SiO2 | <15 | <19 | <28 | <34 | |||||||
Bulk Density(g/cm3) | 110°C×24h | 3.0 | 2.8 | 2.5 | 2.4 | ||||||
1000°C×3h | 2.9 | 2.8 | 2.5 | 2.4 | |||||||
Modulus of Rupture(Mpa) | 110°C×24h | 12 | 10 | 8.5 | 7.0 | ||||||
1000°C×3h | 18 | 15 | 13 | 11 | |||||||
Cold Crushing Strength(Mpa) | 110°C×24h | 120 | 90 | 68 | 50 | ||||||
1000°C×3h | 180 | 120 | 95 | 80 | |||||||
Liner change after buring | 1000°C×3h | ±0.2 | ±0.2 | ±0.3 | ±0.3 | ||||||
Wear resistance(AMTMc-704) | 3.0 | 5.0 | 7.0 | 9.0 | |||||||
Heat Conductivity (W/m.k) | 1.6 | 1.5 | 1.5 | 1.5 | |||||||
Thermal shock resistance(times)(1000°C water cooling) | 35 | 30 | 25 | 20 | |||||||
Refractoriness °C | 1790 | 1790 | 1750 | 1730 | |||||||
Max Working Temperature | 1550 | 1500 | 1400 | 1350 | |||||||
Refractory Brick for Boiler