High alumina refractory cement is also named refractory cement, which is composed of aluminate. According to different alumina content, it presents different characteristics. Alumina cement has great refractoriness, good sulfate resistance, and rapid setting. So it could used in high temperature and high pressure environments, or chemical reaction production.
Specification of High Alumina Refractory Cement
Notes: refractory cement = high alumina cement = calcium aluminate cement
| Items | CA50-A600 | CA50-A700 | CA70 | CA80 | |||||
|---|---|---|---|---|---|---|---|---|---|
| Values | Typical | Limit | Typical | Limit | Typical | Limit | Typical | Limit | |
| Chemical Composition | |||||||||
| Al2O3 | % | 50-51 | ≥50 | 50-52 | ≥50 | 68-71 | ≥68 | 78-80 | ≥77 |
| CaO | % | 32-35 | ≥32 | 32-35 | ≥32 | 28-30 | ≤30 | 18-20 | ≤20 |
| SiO2 | % | 7.8-8.3 | ≤9.0 | 7.0-7.5 | ≤8.0 | 0.2-0.7 | ≤1.0 | 0.1-0.4 | ≤0.5 |
| Fe2O3 | % | 1.5-2.5 | ≤3.0 | 1.5-2.5 | ≤3.0 | 0.1-0.5 | ≤0.7 | 0.1-0.4 | ≤0.5 |
| Na2O+K2O | % | - | ≤0.5 | - | ≤0.5 | - | ≤0.4 | - | ≤0.4 |
| Physical Properties | |||||||||
| 325 Mesh Residue | % | - | ≤20 | - | ≤15 | - | ≤8.0 | - | ≤5.0 |
| Blaine Fineness (㎡/kg) | % | - | ≥320 | - | ≥350 | 380-420 | ≥350 | 450-500 | ≥450 |
| Initial Setting Time | min | 50-120 | ≥30 | 50-120 | ≥30 | 180-240 | ≥150 | 150-210 | ≥30 |
| Final Setting Time | min | 90-180 | ≤360 | 120-210 | ≤360 | 240-300 | ≤360 | 210-270 | ≤300 |
| Flexural Strength (24h) | MPa | - | ≥5.5 | - | ≥6.5 | 9-11 | ≥5.0 | 6-8 | ≥4.0 |
| Flexural Strength (72h) | MPa | - | ≥6.5 | - | ≥7.5 | 11-12 | ≥6.0 | 7-9 | ≥5.0 |
| Compressive Strength (24h) | MPa | 45-55 | ≥40 | 50-60 | ≥50 | 45-55 | ≥30 | 40-50 | ≥25 |
| Compressive Strength (72h) | MPa | 50-60 | ≥50 | 60-65 | ≥60 | 55-65 | ≥40 | 50-60 | ≥30 |
Features of Aluminous Cement
Rapid Setting
In the initial time, the hardness of alumina cement could rapidly increase. The increase rate is higher than quick hardening Portland cement. What’s more, it has great compressive strength that can withstand high pressure. High alumina refractory cement can used in emergency repair architectural works.
High Hydration Heat
In the setting time, aluminate refractory cement will release heat to help cement get hard quickly. This will enhance the hardness at an early stage. High hydration heat also helps to resist low temperatures. Even when used in winter, it also can quickly harden.
Sulfate Resistance
Alumina refractory cement will present a protective film in the chemical reaction production. This characteristic helps the equipment undertake chemical and biological erosion, especially sulfate erosion. It can used in marine engineering construction industry. But, alumina refractory cement could not undertake the alkaline solution.
High Refractoriness
Alumina cement can add other refractory materials to become concrete with refractoriness. The refractoriness helps resist the high-temperature situation. This is a good material used in lining of high temperature kilns or repairing the projects eroded by rain. For more details, please visit Kerui Pinterest pictures.
Application of High Alumina Cement
- As a raw material added to refractory castable, refractory mortar, refractory ramming mass and other amorphous refractory materials;
- Applicable to some projects with special requirements such as emergency repairs, sulfate corrosion resistance, winter kiln construction, etc.;
- As a reagent, added to the process of metallurgical processing (steel and iron mills, foundries), the use of a specific grade of high-alumina cement can capture metal impurities produced during the melting process.
High Alumina Cement Price from Factory
We will provide an appropriate high alumina cement price and discount to customers. Because Zhengzhou Kerui Group Refractory Co., Ltd. a manufacturer in China, which has the price advantage of raw materials and production. Therefore, Kerui brings the benefits to high alumina cement for sale and customers who buy it.
The more you purchase, the lower the price!
Kerui has a professional service team to help customers acquire the best purchase plans. Besides,we will take a protective measures to avoid damage in delivery because the alumina cement easily becomes damp. Please feel free to contact us.
