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Wholesale High Temperature Refractory Cement CA50-A600-A700 High Alumina Fireproof Cement
High Alumina Cement—often referred to as bauxite cement—is a specialized hydraulic binder made by grinding clinker that contains approximately 50% or more alumina (Al₂O₃). Its chief mineral phase is calcium aluminate, which sets it apart from Portland cement, whose chemistry revolves around calcium silicates. This distinct composition endows the material with outstanding characteristics, making it frequently called refractory cement.
Beyond high-temperature applications, High Alumina Cement also proves invaluable in time-critical engineering works, thanks to its rapid setting behavior and impressive early-age strength. It is therefore heavily relied upon in emergency repairs of pressurized defense structures, swift road restoration, and specialized rehabilitation tasks where minimizing downtime is essential.
One of its primary roles lies in the production of low-cement, high-alumina castables—advanced refractory concretes widely used to construct, reline, or repair high-temperature industrial furnaces and kilns across sectors such as metallurgy, ceramics, and waste incineration. These castables deliver superior thermal insulation, strong resistance to acidic slag attack, and sustained mechanical strength under intense heat.
Technical Specifications
Item
CA-50
CA-60
CA-70
CA-80
Chemical Component
Al₂O₃ /%
50-60
60-68
68-77
≥77
SiO₂ /%
≤8.0
≤5.0
≤1.0
≤0.5
Fe₂O₃ /%
≤2.5
≤2.0
≤0.7
0.5
R₂O (Na₂O+0.658K₂O) /%
≤0.4
≤0.4
≤0.4
≤0.4
Rupture Strength MPa
1 day
5.5
2.5
5.0
4.0
3 days
6.5
5.0
6.0
5.0
28 days
/
10.0
/
/
Compressive Strength MPa
1 day
40
20
30
25
3 days
50
45
40
30
28 days
/
80
/
/
Setting Time Min
Initial time
≥30
≥60
≥30
≥30
Final time
≤360
≤1080
≤360
≤360
Product Advantages
Excellent Durability: Exhibits good resistance to corrosion, high wear resistance, and high thermal shock stability.
Superior Bonding & Integrity: Forms a strong, integral bond with furnace linings and aggregates, ensuring monolithic structural integrity.
Optimized Workability: Features stable physical performance, low water requirement, and rapid, complete wet hydration for easier mixing and placement.
Rapid-Hardening & High Early Strength: Achieves high compressive and rupture strength within 1-3 days, accelerating project timeline.
Primary Applications
Furnace of incineration of garbage, recirculating fluidized bed furnace
Furnaces of chemical industry and construction industry
Furnaces of metallurgy industry, heat treatment furnace
Product Gallery
Frequently Asked Questions
Q1: How do I select the right insulation grade for my furnace?
Selection depends on the maximum operating temperature, thermal cycling frequency, and chemical atmosphere. Please provide your design specifications for a tailored recommendation.
Q2: Do these materials contain hazardous substances?
We offer a range of bio-soluble (low-bio-persistence) fibers that meet international health and safety standards for handling and usage.
Q3: Can you provide customized shapes?
Yes, we provide vacuum-formed custom shapes, blocks, and modules based on your CAD drawings to ensure a perfect fit for your equipment.
Our products cover heavy & light shaped and unshaped refractories, and are widely used in power, steel & iron, non-ferrous, petrochemicals, building materials and other industries, and are exported to more than 30 countries and regions in Europe, America, Africa, Oceania, Southeast Asia... Our products cover heavy & light shaped and unshaped refractories, and are widely used in power, steel & iron, non-ferrous, petrochemicals, building materials and other industries, and are exported to more than 30 countries and regions in Europe, America, Africa, Oceania, Southeast Asia...
