cement refractory castable
cement refractory castable is named as the calcium aluminate cement added in the refractory castable. It mainly refers to the content of cement CaO between 1% -2.5% and it can be produced to corundum , high aluminum, clay and low cement refractory castable according to the aggregate Additions.
cement refractory castable Specification
ltem | cement refractory castable | |||
RL-70 | RL-75 | RL-90 | ||
Al2O3% | ≥70 | ≥75 | ≥90 | |
CaO% | ≤1.5 | ≤1.5 | ≤1.2 | |
Refractoriness ℃ | 1790 | 1790 | 1790 | |
Bulk Density g/cm3 |
110℃×24h | ≥2.65 | ≥2.7 | ≥3.15 |
3h | 1500℃ | 1500℃ | 1500℃ | |
≥2.6 | ≥2.65 | ≥3.1 | ||
crushing strength MPa |
110℃×24h | ≥30 | ≥35 | ≥60 |
3h | 1500℃ | 1500℃ | 1500℃ | |
≥60 | ≥65 | ≥100 | ||
Bending Strength Mpa |
110℃×24h | ≥5 | ≥5.5 | ≥10 |
3h | 1500℃ | 1500℃ | 1500℃ | |
≥15 | ≥16 | ≥15 | ||
Permanent Linear change% | 1500℃×3h | 1500℃×3h | 1500℃×3h | |
±0.5 | ±0.5 | ±0.5 | ||
operating temperature℃ | 1500 | 1550 | 1650 |
cement refractory castable Application
cement refractory castable is suitable for soaking furnace and rolling steel heating furnace,various heat treatment furnaces,boilers,shaft kiln,rotary kiln pre-tropical,blast furnace,electric furnace,converter and other industrial kiln lining, also applied to the flue of the CFB boiler tail.