Description
Refractory cement is made from high-quality bauxite and lime as raw materials, blended in a certain proportion to form a mixture. After sintering, the resulting clinker, which is primarily composed of aluminates, is ground into fine powder to produce a refractory hydraulic cement with excellent fire resistance. The refractoriness of refractory cement is no less than 1580°C. Depending on the composition, it can be classified into alumina refractory cement, low-calcium aluminate refractory cement, calcium-magnesium aluminate cement and dolomite refractory cement,etc.
Specification
| Item | Grade | |||||
| CA50-G6 | CA50-G7 | CA50-G9 | CA-65P | CA-70 | CA-80 | |
| Refractoriness (℃) | ≥1420 | ≥1450 | ≥1480 | ≥1610 | ≥1650 | ≥1750 |
| Al2O3（%） | ≥50 | ≥50 | ≥51 | ≥64 | ≥68 | ≥77 |
| CaO（%） | ≥33 | ≥33 | ≥33.5 | ≤35 | ≤30 | ≤20 |
| Specific Surface Area（Blaine method）m2/kg | ≥300 | ≥300 | ≥400 | ≥450 | ≥500 | ≥550 |
| Initial Setting Time（min） | ≥30 | ≥30 | ≥90 | ≥30 | ≥30 | ≥30 |
| Final Setting Time（min） | ≤360 | ≤360 | ≤360 | ≤360 | ≤360 | ≤360 |
| 24h Modulus of Rupture（MPa） | ≥6.5 | ≥7.5 | ≥9.5 | ≥9.0 | ≥8.0 | ≥5.0 |
| 24h Crushing Strength（MPa） | ≥50 | ≥60 | ≥70 | ≥60 | ≥50 | ≥35 |
Applications
Mainly used as a hydraulic binder for unshaped refractory materials.
