EN
Description
Calcium aluminate cement (mineral binder) is a kind of hydraulic binder with 70-80% alumina content, which is sintered by high-quality alumina and high-purity calcium carbonate at high temperature.
Compared with other cement products, this cement’s stability is very prominent, especially in the use of monolithic refractory materials. Its stability and predictability are unmatched by other cement; especially for low cement castables with anti-flocculation, this performance is very important.
The impurity content of this cement is very low, especially the content of Fe₂O₃ and SiO₂. This enables monolithic refractories, especially high-purity ones, to obtain higher high-temperature strength and excellent performance in reducing atmospheres with high CO content.
The gold-proportion mineral phase matching ratio of this cement endows it with good early strength at normal (low) temperature, allowing for faster demoulding time and higher demoulding strength. It also enables continuous and obvious strength increase in each heating stage of monolithic refractories.
This cement can adapt to various construction methods of monolithic refractories, such as ramming, pouring, self-flowing, coating, dry spraying, wet spraying, etc. In monolithic prefabricated products, the use of this cement can achieve lower water content and better workability.
Like other hydraulic binders, this cement must be kept in a dry environment, especially separated from the ground. Under such conditions, its shelf life is at least 6 months. In most cases, its performance can be maintained for more than one year.
Specifications
 Calcium Aluminate Cement 68 71 75 80 Technical Data Sheet |
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| Project/Model | unit | S68 | S71 | S75 | S80 | |
| Specific Surface Area (Blaine Method) ≥ | cm²/g | 4200 | 5000 | 5500 | 8000 | |
| Residue on 90 µm Sieve | % | <5 | ||||
| Setting time | Initial set ≥ | min | 130 | 165 | 150 | 35 |
| Final set ≤ | 250 | 300 | 250 | 150 | ||
| Strength≥ | 6 h Compressive | MPa | 28 | 20 | 28 | 12 |
| 1d Compressive | 65 | 45 | 38 | 35 | ||
| 3d Compressive | 70 | 65 | 60 | 55 | ||
| 6 h Flexural | 8 | 6 | 5 | 5 | ||
| 1d Flexural | 12 | 10 | 8 | 7 | ||
| 3d Flexural | 15 | 12 | 10 | 9 | ||
| Chemical component | Al₂O₃ | % | 65.5-67.7 | 69.0-71.0 | 73.2-75.5 | 78.5-82.5 |
| CaO | 32.0-34.0 | 28.5-30.5 | 23.0-25.3 | 16.2-17.8 | ||
| Fe₂O₃ ≤ | 0.8 | 0.4 | 0.3 | 0.3 | ||
| SiO₂ ≤ | 1.5 | 0.5 | 0.3 | 0.3 | ||
| K₂O+Na₂0 | 0.3 | 0.4 | 0.7 | 0.5 | ||
| Refractoriness ≥ | ℃ | 1570 | 1650 | 1700 | 1810 | |
Applications
As a core binder for high-end refractory materials, this series of products is widely used in various high-temperature industrial fields, providing high-strength and highly corrosion-resistant protective support for equipment linings.
1. Metallurgical Industry
Primarily used as a binder for refractory castables and ramming mixes in key equipment such as blast furnaces, converters, electric furnaces, ladles, and tundishes in steel plants, steel mills, and ferroalloy plants. It is particularly suitable for smelting conditions with high alkalinity and high reducing atmospheres, effectively resisting the erosion and corrosion of molten steel and slag, extending the service life of kilns.
2. Industrial Kilns and Thermal Energy Engineering
Applications include linings of large industrial furnaces such as cement rotary kilns, glass melting furnaces, ceramic kilns, and heat treatment furnaces. Capable of withstanding ultra-high temperature calcination environments above 1700℃, ensuring the furnace body does not crack or peel under prolonged high-temperature operation.
3. Chemical and Energy Industry
Used for linings of equipment such as chemical reactors, waste incinerators, and power plant boilers. With excellent resistance to acid and alkali corrosion and thermal shock stability, it ensures the structural safety and operational efficiency of equipment in complex chemical flue gas and high-temperature, high-pressure environments.
4. Special Refractory Precast Components
Widely used in the preparation of various precast blocks, refractory castables, and plastics, these components are suitable for key masonry parts of tunnel kilns and glass melting furnaces, meeting the requirements of high precision and high stability in construction.
Advantages
1. Gradient Model Design for Precise Adaptation to All Working Conditions
The series includes four models: S68 (≥1570℃), S71 (≥1650℃), S75 (≥1700℃), and S80 (≥1810℃), with Al₂O₃ content and heat resistance increasing in a stepwise manner. Customers can precisely select the model based on the operating temperature and corrosion level of their equipment, avoiding over-design or wasted costs, and directly matching the needs of all scenarios from room temperature to ultra-high temperature.
2. Ultra-Low Impurities, High Cleanliness and Stability.
Strict control of harmful impurities such as Fe₂O₃and SiO₂, and extremely low alkali metal content (K₂O + Na₂O) ensures that the product does not form a low-melting-point glass phase at high temperatures, avoiding defects such as softening, deformation, and black core in the product. It exhibits stable and repeatable performance among monolithic refractories, completely solving the industry pain points of difficult grouting and low strength in low-water cementitious systems.
3. Early Strength and Long-Lasting Performance, Excellent Construction Performance.
Rapid early strength development at room temperature allows for quick demolding and shortens construction time; continuous strength growth at high temperatures provides full-temperature strength support for refractory materials. Excellent construction compatibility, suitable for all construction methods including ramming, pouring, self-leveling, coating, dry spraying, and wet spraying, significantly reducing water addition and optimizing product density and performance.
4. High Temperature Resistance and Reduction Resistance, Strong Environmental Adaptability.
The product possesses excellent high-temperature and high-pressure resistance and reduction resistance stability. Its performance remains stable even in reducing atmospheres with high CO content and complex chemical environments, without pulverization or alteration, making it suitable for various harsh high-temperature protection scenarios.
5. Direct Production and Sales, Stable and High Cost-Effectiveness.
As the original manufacturer, we possess professional formula development and high-temperature calcination processes, controlling the entire process from raw material selection to finished product testing. This not only ensures the stable quality and consistent indicators of each batch of products but also eliminates intermediate distribution links, allowing us to offer highly competitive and satisfactory prices, along with professional technical support, providing customers with a one-stop refractory binder solution.
