China Low Cement Castable Refractory Castable are characterized by their low cement content, typically ranging from 5% to 15%. This reduced cement content results in lower heat generation during hydration, minimizing the risk of thermal cracking and improving the castable’s overall stability.
1. Reduced Heat Generation: Low cement castables generate less heat during hydration compared to conventional castables with higher cement content.
2. Improved Refractoriness: The lower cement content allows for a higher concentration of refractory aggregates.
3. Increased Flexibility: Low cement castables exhibit greater flexibility and adaptability.
Low cement castables do not necessarily refer to High Alumina Cement. Low cement castables can be formulated using various types of cements, including High Alumina Cement, but they are not limited to it.
When It is High Alumina Cement
High Alumina Cement, on the other hand, is a type of cement that contains a high proportion of alumina (Al2O3), typically ranging from 40% to 80%. It is known for its high refractoriness, chemical resistance, and excellent mechanical properties.
While High Alumina Cement can be used as a binder in low cement castables, other types of cements, such as Portland cement or calcium aluminate cement, can also be utilized. The choice of cement depends on the specific requirements and properties desired for the castable.
Low Cement Castables with High Alumina Cement:
When High Alumina Cement is used as the binder in low cement castables, it imparts additional properties and advantages, including:
Exceptional Refractoriness: High Alumina Cement-based low cement castables can withstand even higher temperatures, typically up to 1800°C (3272°F), making them suitable for extreme thermal conditions.
Enhanced Chemical Resistance: The high alumina content provides superior resistance to chemical attack, making these castables ideal for highly corrosive environments.
Improved Mechanical Strength: Low cement castables with High Alumina Cement exhibit higher mechanical strength and abrasion resistance, ensuring durability and longevity in demanding applications.