low-cement castables produced by Hongtai, ultra-low or cement-free castables Replace the majority or all of the cement with the same or similar chemical composition as the main material, refined and scientifically optimized particle gradation , Powder, particle morphology and other factors, while adding a small amount of dispersant (water reducing agent) and the amount of retarders and other complex admixture prepared.
Chemical Composition (%) Al2O3 ≥70
  SiO2 ≤20
Fe2O3 ≤1.3
Max service temperature (°C) 1650
Bulk density after burnt at 110°C (g/cm3) ≥2.45
Linear changing after burnt at (%) 1100°C×3h ±0.2
1500°C×3h ±0.4
Compressive/Bending Strength (MPa) 110°C×24h ≥60/≥7
1100°C×3h ≥80/≥10
1500°C×24h ≥120/≥15
Packing 25kgs Plastic bag/paper bag.