Low Cement Castable
The low cement castable newly developed by Kerui is a new type of castable with a small amount of binder. The key is to use ultra-fine particles no larger than 10μm. Moreover, its thermal shock resistance, slag resistance and corrosion resistance are significantly improved. So, it surpasses similar refractory castables.
- Al2O3(≥): 45% – 92%
- Bulk Density: 2.3g/cm3 – 3g/cm3
- Max Service Temperature: 1450℃ – 1700℃
- Cold Crushing Strength: 72MPa – 85MPa
Low Cement Castable Definition and Composition
Low cement castables refer to castables with a lower cement content. Castables that use pure calcium aluminate cement as a binder and have a CaO content of less than 2.5% are collectively called low-cement castables. Our purpose in reducing the amount of refractory cement uses is to improve the fire resistance of the LC 70 castables. Ultra low cement castable refractory material is different from other refractory castables. We use ultrafine powder that has the same or similar chemical composition as the main material and has a binding effect. With this, we use it to replace most or all of the high alumina cement.
In addition, Kerui optimized the particle ratio, micro powder and particle morphology and other factors. Meanwhile, technicians add trace amounts of dispersant (water reducing agent) and retarder to produce excellent ultra low cement refractory castables.
Technical Indicator of Low Cement Castable
| Item/Grade | Clay | High Alumina | Corundum |
|---|---|---|---|
| ω (Al2O3) ≥/% | 45 | 75 | 92 |
| ω (SiO2) ≥/% | 50 | 12 | 5 |
| ω (CaO) | 1.8 | 1.5 | 1.5 |
| Bulk Density(g/cm3) | 2.3 | 2.6 | 3 |
| Cold Crushing Strength/Mpa | 72 | 75 | 85 |
| Permanent Linear Change/±% | 0.3 | 0.5 | 0.5 |
| Max Service Temperature/℃ | 1450 | 1600 | 1700 |
| Water Needed/% | 6.0-6.5 | 6.0-6.5 | 4.0-5.0 |
Tips: this table is formulated with reference to Chinese refractory industry standards. Contact us for more information.
Characteristics of Low Cement Castable
1. The CaO content in low cement castables is low, which can reduce the formation of the eutectic phase in the material. Therefore, this improves its refractoriness, high temp strength and resistance to slag attack.
2. The water consumption for blending low cement castable high alumina during construction is only 1/3~1/2 of ordinary castables. Therefore, low cement castables have low porosity and high bulk density.
3. After pouring and molding, less cement will be generated during curing. In other words, as the heat treatment temperature increases, the strength of ultra low cement castable refractory also gradually increases.
4. We can appropriately adjust the strength composition of low cement castables to form self-flowing castables and pumped castables. Kerui castables have good use effects and significant economic benefits.
Classification and Uses of Low Cement Castable
Low cement refractory castable is an important material used in high temperature environments. According to their composition and characteristics, we can divide types of refractory castable into three types: corundum, high alumina and clay.
Corundum low cement castable uses corundum particles as the main material. Therefore, it has a high melting point, high hardness and good compressive strength. In addition, we use it as lining material for high-temperature equipment in industrial fields such as metallurgy, glass and chemicals. Moreover, its high density and good corrosion resistance can effectively extend the service life of equipment.
The excellent high aluminum castable is mainly composed of high-aluminum minerals. It has a high aluminum content, good fire resistance and resistance to temperature changes. In addition, high alumina castable refractory can withstand high-temperature sintering and chemical attack. Therefore, we use it as lining material for industrial furnaces such as ferroalloy, cement kilns and glass kilns.
Fire clay castable is made from powdery materials such as clay and kaolin. Therefore, it has good plasticity and is easy to construct and shape. So, fire clay castables are suitable for lining industrial equipment such as steel-making furnaces, iron-making furnaces and copper-making furnaces. That is to say, fire clay low cement castable effectively resists the effects of high temperatures and corrosion.
The Benefits of Choosing Kerui Group
Kerui Refractory has a patent certificate. This means that we have unique technical advantages and innovations in the field of low cement castables. These patent protections ensure that products are recognized for their quality and performance. So, Kerui provides customers with reliable protection. Besides, you also can follow us on Twitter to learn more.
We use automated production lines to ensure that the production process of our products is stable, efficient and precise. Automated production can reduce interference from human factors and improve product consistency and quality stability. Thus, Kerui ensures that customers receive high-quality low cement castable.
As castables and fire bricks manufacturers, Kerui has extensive export experience. So, we are able to meet the needs of customers in different countries and regions. Besides, Kerui has accumulated experience in cross-border cooperation. These experiences can provide customers with more professional and comprehensive services.
Kerui Group has a professional after-sales team that regularly visits customers and collects feedback. What’s more, through regular return visits, Kerui Refractory can keep abreast of customer needs and problems. Subsequently, we will make timely adjustments and improvements to ensure customer satisfaction and refractory product quality.
Conclusion
Kerui uses advanced production equipment to produce low cement castable. Moreover, we are also able to customize different types of refractory castables according to customer needs and provide technical consultation. In other words, customers can obtain cost-effective refractory products from Kerui. In addition, we can also help you achieve long-term stable operation of the project and maximize benefits.