Monolithic Refractories for Iron and Steel Industry:Mullite Heat Insulating Castable
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characteristic:
construction convenient
using for furnace lining
wear-resistant,flame-proof
| Item | | insulating castable | ||||||
| JNL-45 | JBN-40 | JGL-85 | JGL-70 | JDL-80 | JLL-75 | JLL-60 | ||
| Al2O3 % | 45 | 40 | 80 | 70 | 80 | 75 | 60 | |
| CaO % | — | — | — | — | 2.5 | — | — | |
| Refractoriness °C | 1700 | 1670 | 1790 | 1750 | 1790 | 1790 | 1750 | |
| Linear change affter sintered ≤±1% | 1350°C ×3h | 1000°C ×3h | 1500°C ×3h | 1450°C ×3h | 1500 °C ×3h | 1500°C ×3h | 1450°C× 3h | |
| 110°C±5 After drying | Crushing strength Mpa | 8 | 20 | 35 | 30 | 40 | 30 | 25 |
| Modulus rupture Mpa | 1 | — | 5 | 5 | 6 | 5 | 4 | |
| Bonder | clay | water glass | cement | cement | lower cement | phosphate | phosphate | |
High-strength lightweight Insulating refractory castable
1. low bulk density, low thermal conductivity, high intension.
2. good integrity and excellent air impermeability.
3. be used as cover of warm or low- temperature heat engineering equipments
4. It can also be thensulating material in hot temperature furnace.
5. way of usagre: daubing or casting.
The index is as follows:
- Q: How does the composition of monolithic refractories impact their performance?
- The composition of monolithic refractories plays a crucial role in determining their performance. Monolithic refractories are essentially unshaped refractory materials that are used to line furnaces, kilns, and other high-temperature equipment. They are preferred over traditional brick and mortar refractories due to their ease of installation and ability to conform to complex shapes. The composition of monolithic refractories includes various components such as aggregates, binders, and additives. The type and proportion of these constituents significantly influence the physical, mechanical, and thermal properties of the refractory material. Aggregates are the major component of monolithic refractories and provide the structural integrity. They can be made of various materials like alumina, silica, magnesia, and carbon. Each aggregate has its own unique properties that determine the refractory's resistance to heat, chemical attack, and mechanical stress. For example, alumina aggregates offer excellent resistance to high temperatures and chemical corrosion, while carbon-based aggregates are preferred for their high thermal conductivity. Binders are added to the mix to provide cohesion and improve the refractory's strength. Common binders include clay, calcium aluminate cement, and colloidal silica. The selection of binders depends on the desired strength, workability, and setting time of the refractory material. Additives are incorporated in the composition to enhance specific properties. They can improve the refractory's resistance to thermal shock, abrasion, or chemical attack. Additives like zirconium oxide, silicon carbide, and graphite are often used to enhance the performance of monolithic refractories in specific applications. The proper combination and proportion of these constituents are crucial for achieving the desired performance of monolithic refractories. The composition affects the refractory's thermal conductivity, thermal expansion, density, porosity, and chemical resistance. For instance, a higher alumina content would improve the refractory's resistance to high temperatures and chemical corrosion, while a higher silica content would enhance its insulating properties. In conclusion, the composition of monolithic refractories has a significant impact on their performance. The selection of aggregates, binders, and additives must be carefully considered to achieve the desired properties and ensure optimal performance in specific high-temperature applications.
- Q: How are monolithic refractories used in the repair and maintenance of ladle and tundish covers?
- Monolithic refractories are commonly used in the repair and maintenance of ladle and tundish covers due to their excellent thermal resistance and durability. Ladles and tundishes are crucial components in the steelmaking process, and their covers play a vital role in the containment of molten metal and the prevention of heat loss. When ladle and tundish covers are subjected to high temperatures and thermal cycling, they can experience wear and tear, leading to cracks, spalling, or even complete failure. This is where monolithic refractories come into play. Monolithic refractories are unshaped refractory materials that can be easily molded and applied to the damaged areas of ladle and tundish covers. They can be cast, gunned, or sprayed onto the surface, allowing for quick and efficient repairs. These refractories are typically composed of a matrix material, such as alumina, silica, or magnesia, along with various additives and bonding agents. The specific composition depends on the application requirements and the severity of the operating conditions. The repair process begins by identifying the damaged areas of the ladle or tundish cover. Any loose or damaged refractory material is removed, and the surface is prepared for the application of the monolithic refractory. This may involve cleaning, roughening, or even preheating the surface, depending on the specific requirements. The monolithic refractory is then mixed with water or a suitable binder to form a workable consistency. It is then applied to the damaged areas using the appropriate method, such as casting or spraying. After application, the refractory material is allowed to dry and cure, typically through a controlled heating process. Once cured, the monolithic refractory forms a strong and durable lining that can withstand the high temperatures, thermal cycling, and chemical reactions that occur during ladle and tundish operation. It provides excellent thermal insulation, preventing heat loss and reducing energy consumption. Furthermore, monolithic refractories offer superior resistance to slag, metal penetration, and erosion, ensuring extended service life for ladle and tundish covers. They also have good thermal shock resistance, allowing them to withstand rapid temperature changes without cracking or spalling. In summary, monolithic refractories are essential in the repair and maintenance of ladle and tundish covers due to their thermal resistance, durability, and ease of application. Their ability to withstand high temperatures, thermal cycling, and chemical reactions ensures the integrity and efficiency of ladle and tundish operations in the steelmaking industry.
- Q: How do monolithic refractories contribute to energy efficiency in the iron and steel industry?
- Monolithic refractories play a crucial role in improving energy efficiency in the iron and steel industry. These refractories are made from a single material and can be easily molded, thereby providing a seamless lining in various high-temperature applications, such as furnaces and kilns. By having a monolithic lining, heat loss is significantly minimized as there are no joints or gaps for heat to escape. This leads to reduced energy consumption and improved overall energy efficiency in the industry. Additionally, monolithic refractories offer better thermal conductivity and insulation properties, enabling better heat transfer and retention within the equipment, further optimizing energy usage.
- Q: Can monolithic refractories be used for the lining of continuous casting tundishes and molds?
- Indeed, tundishes and molds used in continuous casting can utilize monolithic refractories for their lining. These refractories consist of a single, uniform structure, in contrast to traditional refractories that are composed of multiple bricks or tiles. The utilization of monolithic refractories offers various advantages in the lining of tundishes and molds during continuous casting procedures. Firstly, their monolithic nature allows for convenient installation and repair, as they can be cast or gunned into place, eliminating the need for intricate brickwork. Consequently, this reduces downtime and enhances productivity. Furthermore, monolithic refractories demonstrate exceptional resistance to thermal shock, which is critical for tundishes and molds that undergo rapid and extreme temperature fluctuations throughout the casting process. Their high thermal conductivity additionally ensures efficient heat transfer, facilitating uniform cooling and solidification of the cast metal. Additionally, monolithic refractories exhibit commendable resistance to chemical attack, ensuring prolonged performance even in the presence of molten metal and slag. Their low porosity further prevents metal penetration and the formation of cracks or spalling. In summary, monolithic refractories are a practical and efficient choice for lining continuous casting tundishes and molds, offering superior performance, ease of installation, and durability in the demanding conditions of the casting process.
- Q: How do monolithic refractories contribute to the efficiency of iron and steel production?
- Monolithic refractories play a critical role in improving the efficiency of iron and steel production processes. These refractories are renowned for their superior thermal properties, high resistance to mechanical stress, and outstanding resistance to chemical corrosion. One primary manner in which monolithic refractories enhance the efficiency of iron and steel production is by providing effective insulation. By lining furnaces and other high-temperature equipment, monolithic refractories prevent heat loss and ensure consistent maintenance of desired temperatures. This insulation helps reduce energy consumption by minimizing heat wastage, ultimately resulting in cost savings. Moreover, monolithic refractories offer exceptional resistance to thermal shock. In the iron and steel industry, frequent heating and cooling cycles are common, and conventional refractory materials may crack or fail under these conditions. However, monolithic refractories can endure rapid temperature fluctuations without failure, guaranteeing the longevity and reliability of the refractory lining. This resistance to thermal shock reduces downtime for repairs and maintenance, thereby increasing overall production efficiency. Furthermore, monolithic refractories exhibit significant resistance to chemical corrosion. In iron and steel production, various corrosive substances such as molten metal, slag, and gases are present. By utilizing monolithic refractories as lining materials, the underlying structures are protected from chemical attack, preventing erosion and prolonging the equipment's service life. This corrosion resistance reduces the need for frequent repairs or replacements, leading to cost savings and enhanced productivity. Additionally, monolithic refractories offer easy installation and repair. Unlike traditional refractories, which are often constructed brick by brick, monolithic refractories are applied as a single mass. This allows for faster installation and reduces the potential for weak points or joints that may compromise the overall efficiency of the refractory lining. Furthermore, when repairs or maintenance are necessary, monolithic refractories can be easily patched or replaced, minimizing downtime and ensuring seamless operation. To summarize, the use of monolithic refractories in iron and steel production contributes to increased efficiency in multiple ways. Their outstanding thermal insulation properties reduce energy consumption, while their resistance to thermal shock and chemical corrosion ensures reliable and long-lasting refractory linings. Additionally, their easy installation and repair capabilities further enhance productivity. Overall, monolithic refractories are an indispensable component in improving the efficiency and sustainability of iron and steel production processes.
- Q: How do monolithic refractories resist chemical attacks from molten metals and slag?
- Monolithic refractories resist chemical attacks from molten metals and slag due to their high chemical stability, which is achieved through the use of carefully selected raw materials and advanced manufacturing processes. These refractories are designed to have low porosity, which prevents the penetration of molten metals and slag into the material. Additionally, they possess high resistance to corrosion and erosion, even at high temperatures, allowing them to withstand the harsh chemical environments created by molten metals and slag.
- Q: How do monolithic refractories help in enhancing the durability of iron and steel equipment?
- Monolithic refractories play a crucial role in enhancing the durability of iron and steel equipment by providing high resistance to extreme temperatures, chemical attack, and mechanical wear. These refractories are composed of a single, homogeneous material, making them more robust and reliable compared to traditional brick or castable refractories. The high-temperature resistance of monolithic refractories allows them to withstand the extreme heat generated in iron and steel manufacturing processes, such as melting, casting, and forging. They can withstand temperatures exceeding 3000°F (1650°C) without losing their structural integrity, preventing premature failure of the equipment. This thermal resistance helps to maintain the shape and structure of the refractory lining, ensuring the efficient and consistent performance of the equipment. In addition to high heat resistance, monolithic refractories also exhibit excellent chemical resistance. Iron and steel equipment often comes into contact with corrosive substances, such as molten metal, slag, and various chemical compounds. The monolithic refractories' ability to resist chemical attack prevents degradation and erosion of the equipment's lining, extending its lifespan. Furthermore, monolithic refractories provide exceptional mechanical strength and wear resistance. The continuous exposure to abrasive materials, physical impacts, and mechanical stress can cause severe damage to the equipment. However, the dense and compact structure of monolithic refractories makes them highly resistant to mechanical wear, minimizing the risk of erosion and spalling. The flexibility and versatility of monolithic refractories are also advantageous in enhancing the durability of iron and steel equipment. They can be easily molded, shaped, and installed in complex geometries, ensuring a tight and precise fit. This eliminates the formation of gaps or weak points, which could lead to thermal or chemical leakage, reducing the risk of equipment failure. Overall, the use of monolithic refractories in iron and steel equipment significantly enhances its durability by providing exceptional resistance to high temperatures, chemical attack, and mechanical wear. These refractories ensure the longevity and reliability of the equipment, resulting in improved operational efficiency and cost-effectiveness in the iron and steel industry.
- Q: What are the latest advancements in monolithic refractories for the iron and steel industry?
- Some of the latest advancements in monolithic refractories for the iron and steel industry include the development of high-performance materials with enhanced thermal shock resistance, improved corrosion resistance, and increased durability. These advancements have been achieved through the incorporation of advanced additives and binders, as well as the utilization of new manufacturing techniques such as spray drying and rapid heat curing. Additionally, there have been advancements in the design of monolithic refractory shapes and installation techniques to optimize their performance and increase their lifespan in the demanding environments of the iron and steel industry.
- Q: What are the recommended installation techniques for monolithic refractories?
- The recommended installation techniques for monolithic refractories depend on the specific type and application of the refractory material. However, there are some general guidelines that can be followed for most monolithic refractory installations. 1. Surface Preparation: Before installing monolithic refractories, it is crucial to ensure that the surface is clean, dry, and free from any loose particles or contaminants. This can be achieved by removing any existing refractory materials, cleaning the surface thoroughly, and allowing it to dry completely. 2. Mixing: Monolithic refractories are typically supplied in a dry or wet form, depending on the specific material. If the refractory is supplied in a dry form, it needs to be mixed with water or a suitable liquid binder to form a workable consistency. It is important to follow the manufacturer's guidelines for the correct mixing ratio and mixing time to ensure proper bonding and setting of the refractory material. 3. Application: The application technique for monolithic refractories can vary depending on the specific material and the desired installation method. Some common techniques include troweling, gunning, ramming, and casting. - Troweling: This technique involves manually applying the refractory material using a trowel. It is typically used for thin linings or patching small areas. - Gunning: Gunning is a method of applying refractory material using a gunning machine or a hand-held gun. It is suitable for large areas or areas that are difficult to access. The refractory material is mixed with water or a liquid binder and sprayed onto the surface at a high velocity. - Ramming: Ramming involves compacting the refractory material into place using a ramming tool or a pneumatic hammer. It is commonly used for forming furnace linings or repairing damaged areas. - Casting: Casting refers to pouring the refractory material into a mold to form a desired shape or lining. It is often used for creating complex shapes or large-sized components. 4. Curing and Drying: After the refractory material is applied, it needs to be properly cured and dried to achieve its maximum strength and thermal properties. The curing and drying process can vary depending on the specific material, but typically involves controlled heating at a gradual rate to remove any remaining moisture and to allow the refractory to set and harden properly. It is important to note that these are general guidelines, and it is always recommended to consult the manufacturer's instructions and specifications for the specific monolithic refractory material being used. Following the recommended installation techniques will help ensure the proper performance and longevity of the refractory lining.
- Q: How can the lifespan of monolithic refractories be extended in the iron and steel industry?
- The lifespan of monolithic refractories in the iron and steel industry can be extended through various measures. Firstly, proper installation and maintenance of the refractories is crucial. This includes ensuring that the refractories are correctly shaped and sized to fit the specific application, as well as using appropriate installation techniques and materials. Regular inspections should be conducted to identify any signs of wear or damage, and immediate repairs or replacements should be carried out to prevent further deterioration. Secondly, implementing effective heat management practices can significantly prolong the lifespan of monolithic refractories. This involves monitoring and controlling the temperature gradients within the refractory lining to prevent thermal shock and excessive thermal cycling. Adequate insulation and cooling systems should also be in place to maintain a stable and controlled environment. Furthermore, proper handling and operation of the equipment and processes can contribute to extending the refractory lifespan. Avoiding sudden temperature changes, minimizing mechanical stress and impact, and employing appropriate operating procedures can help reduce the wear and tear on the refractories. Additionally, utilizing advanced refractory materials and technologies can enhance the lifespan of monolithic refractories. The development and use of high-performance and specialized refractories, such as advanced ceramics or specialized coatings, can provide increased resistance to thermal and chemical degradation, ultimately extending their lifespan. Lastly, continuous research and development efforts should be undertaken to explore innovative solutions for refractory longevity in the iron and steel industry. Collaborating with suppliers, experts, and industry partners can help identify and implement new technologies and techniques that can improve the durability and performance of monolithic refractories. In summary, extending the lifespan of monolithic refractories in the iron and steel industry requires a combination of proper installation and maintenance, effective heat management, careful handling and operation, utilization of advanced materials, and ongoing research and development. By implementing these strategies, the iron and steel industry can optimize refractory performance and reduce downtime and costs associated with frequent replacements.
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Monolithic Refractories for Iron and Steel Industry:Mullite Heat Insulating Castable
- Ref Price:
-
- Loading Port:
- China Main Port
- Payment Terms:
- TT OR LC
- Min Order Qty:
- -
- Supply Capability:
- -
OKorder Service Pledge
Quality Product, Order Online Tracking, Timely Delivery
OKorder Financial Service
Credit Rating, Credit Services, Credit Purchasing
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