Description of Rongsheng Heat Resistant Low And Ultra-Low Cement Castables
Low and ultra-low cement castables are specialized refractory materials that have a significantly reduced content of cement compared to traditional castables. This modification results in several advantages, including lower shrinkage, improved thermal shock resistance, and reduced sulfur dioxide emissions.
Low cement castables contain less than 5% cement, while ultra-low cement castables contain less than 1% cement. The reduced cement content is achieved by incorporating alternative binders, such as magnesium oxychloride or sodium silicate, along with special aggregates and admixtures. These binders provide the castable with strength and cohesion without the associated drawbacks of traditional cement.
Rongsheng Group have more than 15 years of production and sales experience in refractory castable with strict quality control, and export our products to all over the world. All the products are directly from our factory to your hands without other traders with very good packaging.
Benefits of Low and Ultra-Low Cement Castables:
Reduced Shrinkage: The lower cement content leads to lower shrinkage during the curing process, minimizing cracking and spalling.
Improved Thermal Shock Resistance: The absence or reduced amount of calcium oxide (CaO) in the cementitious phase enhances the castable’s ability to withstand rapid temperature fluctuations.
Reduced Sulfur Dioxide Emissions: During decomposition, traditional cement emits sulfur dioxide (SO2), a harmful gas. Low and ultra-low cement castables with their alternative binders significantly reduce SO2 emissions.
Applications of Low and Ultra-Low Cement Castables:
Glass Industries: Low and ultra-low cement castables are widely used in glass plants due to their resistance to high temperatures and thermal shock. They are employed in forming, annealing, and melting furnaces.
Steel Industries: These castables find applications in steelmaking furnaces, ladles, and tundishes, where they withstand the extreme conditions and exposure to molten metals.
Non-Ferrous Smelting: Low and ultra-low cement castables are employed in the smelting of metals like copper, aluminum, and nickel, where they are subjected to high temperatures and corrosive environments.
Cement and Lime Kilns: These castables are used in cement and lime kilns due to their ability to withstand high temperatures and resistance to chemical attack.
Acid Resistant Applications: Low and ultra-low cement castables with special additives can be used in applications involving exposure to acids, such as wastewater treatment plants or chemical processing units.
The growing demand for high-performance refractories with improved durability and environmental properties has led to the widespread adoption of low and ultra-low cement castables. These materials are revolutionizing the refractory industry by providing a versatile and sustainable solution for a wide range of high-temperature applications.
Physical and chemical indicators of Low And Ultra-Low Cement Castables:
| Item | Index | |||
| Clay | High Alumina | Corundum | ||
| Al2O3 % | ≥45 | ≥75 | ≥98 | |
| CaO % | ＜1.8 | ＜1.5 | ＜1.0 | |
| Bulk density g/cm3 | 110℃×24h | ≥2.3 | ≥2.6 | ≥3.1 |
| 1350℃×3h | ≥2.26 | ≥2.61 | / | |
| 1550℃×3h | / | / | ≥3.00 | |
| Cold Crushing Strength MPa | 110℃×24h | ≥70 | ≥75 | ≥85 |
| 1350℃×3h | ≥85 | ≥90 | / | |
| 1550℃×3h | / | / | ≥100 | |
| Flexural Strength MPa | 110℃×24h | ≥6 | ≥8 | ≥9 |
| 1350℃×3h | ≥8 | ≥9 | / | |
| 1550℃×3h | / | / | ≥11 | |
| Permanent linear change Rate % | 1000℃×3h | -0.3 | -0.2 | -0.2 |
| 1350℃×3h | ±0.3 | ±0.5 | / | |
| 1550℃×3h | / | / | ±0.5 | |
| Maximum service temperature ℃ | 1450 | 1600 | 1800 | |
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Why choose us?
1.Abundant Experience. Rongsheng Group have over 20 years experience in the refractory industry and we have a deep understanding of the materials and applications we work with. We can provide expert advice and guidance to help customers find the best solutions for their needs.
2.Quality products. We pride ourselves on providing high-quality refractory products that are made to last. Our materials are carefully sourced and tested to ensure they meet our strict standards.
3.Competitive Price. We offer competitive pricie on all of our products without sacrificing quality and make the products competitive in your market.
4.Customization. We understand that every customer is unique, which is why we offer customized solutions tailored to their specific requirements. Whether it’s a custom shape or size, we can work with customers to create the ideal product for their application.
5.Safety. We take safety seriously and ensure that all of our products meet safety standards. Safty packing, prompt delivery time, and excellent after-sales services.
6.Large stocks. With a large stock of products on hand, we can better serve our customers, save money, and gain a competitive edge in their industry.
7. Overall solutions. We offer optimal and comprehensive solutions to supply the necessary refractory material for your high temperature kiln.
8.Long-term relationships. We believe in building long-term relationships with our customers based on trust and mutual benefit. We are committed to providing ongoing support and service to ensure customer satisfaction. Rongsheng Refractory can be used in many fields of steel, nonferrous metals, glass, cement, ceramic, petrochemical, machinery, boiler, light, and power industries. What’s more, Industrial distributors, refractory contractors, sales agents, trading companies, and refractory consultants can all benefit from promoting and selling our top-of-the-line refractory products. With a focus on durability, longevity, and performance, our products are designed to exceed your expectations and provide your customers with the best possible results.
So choosing us is the right choice for you.If you are interested in our products or if you have any question, pls feel free to contact us at any time. We will reply as soon as possible.