Refractory Cement CA50-A600-A700 CA60 CA70 CA80 High Temperature High Alumina Fireproof Cement For Kiln, Boiler And Smelting Furnace
High Alumina Cement, traditionally known as bauxite cement, is a specialized hydraulic cementitious material produced by grinding clinker with an alumina (Al₂O₃) content typically around 50% or higher. Its primary mineral component is calcium aluminate, which distinguishes it from ordinary Portland cement that is based on calcium silicate. This composition grants it exceptional properties, leading to its common designation as refractory cement.
A key application of this cement is in the formulation of low-cement, high-alumina castables. These advanced refractory concretes are essential for constructing, lining, or repairing various high-temperature industrial furnaces and kilns, such as those used in metallurgy, ceramics, and incineration. They provide superior thermal insulation and excellent resistance to acid slag erosion while maintaining high structural strength under extreme heat.
Beyond refractory uses, High Alumina Cement is critically valuable for urgent engineering projects due to its rapid hardening and high early strength development. It is extensively employed in emergency repair scenarios for pressurized defense structures, rapid road reinstatements, and specialized rehabilitation work where quick return to service is paramount. However, its use in structural concrete requires careful formulation and curing control due to potential long-term strength conversion issues. Its unique combination of refractoriness, chemical resistance, and rapid setting makes it an indispensable material in both high-temperature industries and time-sensitive construction.
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Item
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CA-50
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CA-60
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CA-70
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CA-80
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Chemical component
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Al2O3 /%
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50-60
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60-68
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68-77
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≥77
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SiO2 /%
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≤8.0
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≤5.0
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≤1.0
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≤0.5
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|
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Fe2O3 /%
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≤2.5
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≤2.0
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≤0.7
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0.5
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R2O
(Na2O+0.658K2O) /%
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≤0.4
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≤0.4
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≤0.4
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≤0.4
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Rupture strength MPa
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1day
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5.5
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2.5
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5.0
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4.0
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|
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3days
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6.5
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5.0
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6.0
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5.0
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28days
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/
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10.0
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/
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/
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Compressive strength MPa
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1day
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40
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20
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30
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25
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|
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3days
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50
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45
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40
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30
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28days
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/
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80
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/
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/
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Setting time Min
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Initial time
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≥30
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≥60
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≥30
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≥30
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Final time
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≤360
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≤1080
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≤360
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≤360
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Advantages:
1.Rapid-Hardening & High Early Strength: Achieves high compressive and rupture strength within 1-3 days, accelerating project timeline
2.Superior Bonding & Integrity: Forms a strong, integral bond with furnace linings and aggregates, ensuring monolithic structural integrity.
3.Optimized Workability: Features stable physical performance, low water requirement, and rapid, complete wet hydration for easier mixing and placement.
4.Exceptional High-Temperature Performance: Refractoriness exceeds 1650°C, with a service temperature capable of reaching 1800°C, suitable for various atmospheres.
5.Excellent Durability: Exhibits good resistance to corrosion, high wear resistance, and high thermal shock stability.
6.Low Impurity Content: Contains lower levels of impurities (SiO2, Fe2O3, R2O) compared to common cements, enhancing high-temperature properties.
Application:
1.Furnaces of chemical industry and construction industry.
2.Furnaces of metallurgy industry, heat treatment furnace.
3.Furnace of incineration of garbage, recirculating fluidized bed furnace.
Product Tags:
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High Alumina Kiln Refractory Cement High Temperature Fireproof Images
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