Monolithic Refractories for Iron and Steel Industry - Mould Powders / Continuous Casting Powders and Granules
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT or LC
- Min Order Qty:
- 10 m.t.
- Supply Capability:
- 100000 m.t./month
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Product Description:
The Mould Powders are composed essentially of CaO-Al2O3-SiO2 with addition of fluxing agents and carbon.
Mold Powders have different functions:
Lubrication between the solidifying strand and mould wall
Control of heat transfer between the strand and mould
Thermal insulation of the liquid steel surface
Prevention of re-oxidation
Inclusion absorption
The above functions are controlled by the following properties:
Basicity
Viscosity
Melting speed
Melting behaviour
Crystallization
The choice of a mould powder depends on:
Mould size
Oscillation conditions
Casting speed
Steel grade
Technical Data:
FAQ
Q:Are you a trading company or manufacturer?
A:CNBM is a large-scale central governmental industrial group with its own manufacturing sector, research and development sector, trading sector and logistics sector.
Q:I have some special requirement about specifications.
A:We have a well-rounded product range, which endows us with the capability of applying many special specifications. Please feel free to contact us with yours.
Q:Do you accept OEM service?
A:Yes, we do.
Q:What is your delivery time?
A:It depends on the size/complexity of your order and our own production schedule. Usually we provide a faster delivery than the industry's average.
Q:What is the payment term?
A:Our payment terms are negotiable.
Q:Can I have my own logo on the product?
A:Sure, we can apply your own logo on the products according to your drawings.
- Q: How do monolithic refractories improve the efficiency of ladle and tundish preheating stations?
- Monolithic refractories play a crucial role in enhancing the efficiency of ladle and tundish preheating stations. These refractories are specifically designed to withstand high temperatures and thermal shocks, making them ideal for use in preheating applications. One key way in which monolithic refractories improve efficiency is by providing excellent heat insulation. These refractories have low thermal conductivity, meaning they minimize heat loss from the preheating station to the surroundings. As a result, more heat is retained within the ladle or tundish preheating station, leading to faster and more efficient heating of the vessel. Additionally, monolithic refractories offer superior heat retention properties. Once heated, these refractories have the ability to store and release heat gradually over time. This characteristic allows for a more consistent and controlled heating process in the ladle or tundish preheating station. By maintaining a stable temperature, the refractories ensure that the vessel is heated uniformly and prevent thermal shocks that could lead to cracking or other damage. Furthermore, monolithic refractories have excellent resistance to chemical reactions and erosion caused by molten metals and slag. Ladles and tundishes are often exposed to corrosive environments, and the use of monolithic refractories helps to protect against degradation and extend the lifespan of the preheating station. This durability reduces the need for frequent maintenance and replacement, leading to cost savings and improved overall efficiency. In summary, monolithic refractories improve the efficiency of ladle and tundish preheating stations by providing excellent heat insulation, heat retention, and resistance to chemical reactions. These properties result in faster and more uniform heating, reduced heat loss, and increased durability of the preheating station. Ultimately, these benefits contribute to improved productivity and cost-effectiveness in the steelmaking process.
- Q: What are the key characteristics of monolithic refractories for electric arc furnace applications?
- The key characteristics of monolithic refractories for electric arc furnace applications include excellent thermal shock resistance, high erosion and corrosion resistance, good mechanical strength, and the ability to withstand high temperatures and aggressive chemical environments. Monolithic refractories also offer easy installation and maintenance due to their shape versatility and ability to be cast or gunned into place, ensuring optimal performance and longevity in electric arc furnace operations.
- Q: How are monolithic refractories installed and repaired in iron and steel plants?
- Monolithic refractories are essential components in iron and steel plants, as they provide high-temperature resistance and insulation. They are commonly used in various applications, such as lining furnaces, ladles, and other equipment that come into contact with molten metal. The installation of monolithic refractories in iron and steel plants typically involves several steps. First, the surface that will receive the refractory material must be prepared by removing any existing refractories or contaminants. This can be done through mechanical methods, such as sandblasting, or chemical cleaning processes. Next, the monolithic refractory material is mixed with water or a suitable binder to form a workable consistency. This mixture is then applied to the prepared surface using various techniques, such as gunning, casting, or troweling. Gunning involves using a high-pressure gun to spray the refractory material onto the surface, while casting involves pouring the mixture into a mold. Troweling is a manual method that involves spreading the refractory material with a trowel. Once the refractory material is applied, it needs to be properly cured or dried. This is usually achieved by allowing the material to air dry or by using controlled heating. The curing process is crucial to ensure the refractory material develops the desired properties, such as strength and resistance to thermal shock. In terms of repairs, monolithic refractories in iron and steel plants can deteriorate over time due to the harsh operating conditions. When repairs are needed, damaged or worn-out areas of the refractory lining must be identified. This can be done through visual inspection or non-destructive testing techniques. The repair process typically involves removing the damaged refractory material by chipping, drilling, or cutting. The surface is then prepared as mentioned earlier, and a new batch of monolithic refractory material is applied to restore the lining. The repair material should be compatible with the existing lining and provide similar properties to ensure the overall integrity of the refractory structure. It is important to note that the installation and repair of monolithic refractories in iron and steel plants require skilled personnel with knowledge of refractory materials and installation techniques. Additionally, proper safety measures should be followed to protect workers from potential hazards, such as exposure to high temperatures, dust, and chemicals. Regular inspection and maintenance are also crucial to identify any potential issues early on and prevent major failures that could impact production and safety.
- Q: How are monolithic refractories used in the repair and maintenance of ladles and tundishes?
- The steel industry extensively utilizes monolithic refractories for the repair and maintenance of ladles and tundishes. These refractories are specifically designed to endure the extreme conditions encountered during the steelmaking process, including high temperatures, thermal shock, and chemical erosion. In the case of ladle repair, monolithic refractories are employed to line the inner walls. Ladles are exposed to intense heat and corrosive molten metal, and the refractory lining serves as insulation and protection against these harsh circumstances. Additionally, the lining helps to maintain the desired temperature of the molten metal, ensuring it remains in an appropriate state for processing. Regarding tundishes, monolithic refractories are used to line the bottom, sides, nozzle, and impact pad. Tundishes are responsible for distributing molten metal to multiple casting molds and are subject to high temperatures and thermal shocks. The refractory lining helps to sustain the necessary temperature and prevent any leakage of molten metal. During the repair and maintenance process, monolithic refractories are applied as dense, high-strength materials that are easy to shape and install. They can be formed into various shapes, such as bricks, castables, and gunning mixes, depending on the specific requirements of the ladle or tundish. These refractories are frequently applied using specialized techniques, such as gunning or casting, to ensure proper adhesion and durability. In addition to their thermal and chemical resistance properties, monolithic refractories also possess excellent mechanical strength and resistance to abrasion. This is particularly crucial in ladles and tundishes, as they experience constant wear and tear from the movement of molten metal and the handling of refractory materials during repair and maintenance. Overall, monolithic refractories play a vital role in the repair and maintenance of ladles and tundishes in the steel industry. They provide the necessary insulation, protection, and durability required to withstand the demanding conditions of steelmaking.
- Q: How do monolithic refractories resist thermal shock in the iron and steel industry?
- Monolithic refractories in the iron and steel industry resist thermal shock primarily due to their ability to absorb and distribute thermal stress. These refractories are composed of a single, continuous structure, eliminating the weaknesses inherent in jointed or layered materials. Their dense and homogeneous structure allows for efficient heat transfer and expansion, minimizing the risk of cracking or spalling caused by sudden temperature fluctuations. Additionally, monolithic refractories possess high thermal conductivity, which aids in dissipating heat and preventing localized hotspots. Overall, their resilience to thermal shock makes them ideal for withstanding the extreme conditions of the iron and steel manufacturing processes.
- Q: How do monolithic refractories improve the quality and consistency of iron and steel products?
- The use of monolithic refractories is essential for enhancing the quality and consistency of iron and steel products. These refractories, which are not shaped and can be easily molded and installed, offer several advantages over traditional brick refractories. To begin with, monolithic refractories provide superior thermal insulation properties, which effectively manage heat during the production process. By maintaining consistent and controlled temperatures, these refractories prevent thermal shocks and minimize thermal gradients, resulting in reduced cracking and distortion in the final products. As a result, the dimensional stability and overall quality of the products are improved. Additionally, monolithic refractories exhibit excellent resistance to thermal spalling and erosion. They can withstand high temperatures, chemical attacks, and mechanical stress, protecting the lining of furnaces and vessels used in iron and steel production. This resistance enhances the durability and reliability of refractory linings, preventing premature failure and extending the lifespan of the equipment. Another advantage of monolithic refractories is their ability to create a seamless lining. Unlike brick refractories, which have joints and gaps that can cause heat loss and uneven distribution, monolithic refractories form a continuous lining with no weak points. This ensures uniform heat distribution and minimizes the risk of hotspots or cold spots, resulting in consistent and reliable iron and steel products. Moreover, monolithic refractories offer flexibility in design and installation. They can be customized to fit various shapes and sizes, allowing for better furnace design optimization. This flexibility enables efficient use of space, improved heat transfer, and reduced energy consumption, all of which contribute to the overall quality and consistency of the final iron and steel products. In conclusion, monolithic refractories enhance the quality and consistency of iron and steel products by providing superior thermal insulation, resistance to thermal spalling and erosion, seamless linings, and flexibility in design and installation. These refractories improve the efficiency and reliability of the production process, resulting in higher-quality final products that meet the industry's stringent standards.
- Q: What are the factors affecting the thermal conductivity of monolithic refractories?
- There are several factors that can affect the thermal conductivity of monolithic refractories. 1. Composition: The chemical composition of the refractory material plays a significant role in determining its thermal conductivity. Different types of refractories have different thermal conductivities based on the types and amounts of raw materials used. For example, refractories with a higher content of insulating materials, such as alumina or silica, tend to have lower thermal conductivities. 2. Porosity: The porosity of the refractory material also affects its thermal conductivity. Higher porosity means there are more air or gas-filled voids within the material, which can act as thermal insulators. Therefore, refractories with higher porosity tend to have lower thermal conductivities. 3. Density: The density of the refractory material is another important factor. Higher density materials usually have higher thermal conductivities, as the particles are packed more closely together, allowing for better heat transfer. 4. Grain size: The size of the grains in the refractory material can impact thermal conductivity. Smaller grain sizes result in higher contact points between particles, facilitating better heat transfer. Therefore, refractories with smaller grain sizes typically have higher thermal conductivities. 5. Temperature: The temperature at which the refractory material operates can also affect its thermal conductivity. Some materials may exhibit changes in thermal conductivity at different temperature ranges. For instance, certain refractories may have lower thermal conductivities at low temperatures but higher conductivities at high temperatures due to changes in their crystal structure. 6. Moisture content: The presence of moisture or water in the refractory material can significantly decrease its thermal conductivity. Water has a relatively low thermal conductivity, so even a small amount of moisture can act as an insulating barrier within the material. 7. Microstructure: The microstructure of the refractory material, including the arrangement and orientation of its grains, can affect thermal conductivity. A well-aligned microstructure with good interconnectivity between the grains can enhance heat transfer, resulting in higher thermal conductivity. Overall, the thermal conductivity of monolithic refractories is influenced by a combination of factors, including composition, porosity, density, grain size, temperature, moisture content, and microstructure. Understanding and controlling these factors is crucial for optimizing the thermal performance of monolithic refractories in various high-temperature applications.
- Q: What are the typical compositions of monolithic refractories?
- Typically, monolithic refractories consist of a combination of aggregates, binders, and additives. Aggregates, such as alumina, magnesia, or silicon carbide, provide the main refractory properties and are chosen based on the desired characteristics of the refractory, such as resistance to high temperatures, thermal shock, or chemical attack. To bind the aggregates together and give the refractory its shape and strength, binders are used. Common binders include clay, calcium aluminate cement, or colloidal silica. The binder also impacts the overall performance of the refractory, affecting properties like thermal conductivity and chemical resistance. Additives are often included in the composition of monolithic refractories to improve specific properties or facilitate the processing. These additives can be plasticizers, which enhance workability and make installation easier, or antioxidants, which enhance the refractory's resistance to oxidation. Ultimately, the specific composition of a monolithic refractory can vary depending on the intended application and desired performance characteristics. Different combinations of aggregates, binders, and additives can be customized to meet specific temperature ranges, chemical environments, or mechanical stresses.
- Q: How do monolithic refractories improve the durability of furnace linings?
- The durability of furnace linings is significantly enhanced by the unique characteristics and properties of monolithic refractories. Unlike traditional brick refractories, which are made up of individual bricks or tiles, monolithic refractories consist of a single, homogeneous structure. A key advantage of monolithic refractories is their ability to eliminate joints and seams, which are weak points in traditional brick refractories. These joints can lead to cracks and failures due to thermal expansion and contraction. In contrast, monolithic refractories are poured or gunned into place, creating a seamless lining that minimizes the potential for cracks. This seamless structure increases the durability of the lining and reduces its susceptibility to thermal stress. In addition, monolithic refractories exhibit excellent thermal shock resistance, which is crucial for furnace linings that experience rapid and extreme temperature changes. The monolithic structure allows for better heat transfer and distribution, preventing localized hotspots that can cause thermal shock and lining failure. This enhanced thermal shock resistance enables the furnace lining to withstand repeated heating and cooling cycles without significant damage, thus improving its overall durability. Furthermore, monolithic refractories offer superior resistance to erosion and corrosion. Furnace linings are often exposed to harsh chemicals, molten metals, and abrasive materials, which can cause erosion and corrosion over time. Monolithic refractories are specifically designed to resist these corrosive agents, protecting the lining from chemical attacks and physical wear. This resistance ensures a longer lifespan for the furnace lining and reduces the need for frequent repairs or replacements. Moreover, monolithic refractories possess better insulation properties compared to traditional brick refractories. They have lower thermal conductivity, meaning that heat transfer through the lining is minimized. This insulation property helps to maintain a more stable and uniform temperature within the furnace, reducing thermal stress on the lining and contributing to its longevity. To summarize, monolithic refractories enhance the durability of furnace linings by eliminating joints and seams, improving thermal shock resistance, providing erosion and corrosion resistance, and offering superior insulation properties. These materials are specifically engineered to withstand the extreme conditions inside furnaces, ensuring a longer lifespan for the lining and reducing maintenance costs in the long term.
- Q: How do monolithic refractories contribute to reducing downtime in iron and steel plants?
- The use of monolithic refractories plays a vital role in minimizing downtime in iron and steel plants. They have several key advantages over traditional brick refractories. To begin with, monolithic refractories are highly adaptable and can be easily shaped and installed. This allows for faster repairs and replacements. In contrast to brick refractories, which require time-consuming and labor-intensive processes like bricklaying and mortar application, monolithic materials can be directly applied in a castable or gunning form. This significantly reduces the time needed for repairs. Furthermore, monolithic refractories offer better thermal insulation and resistance to thermal shocks, which are common in iron and steel plants. This improved thermal performance helps to maintain stable operating temperatures and prevents sudden temperature fluctuations that can lead to refractory failure and subsequent downtime. By minimizing these thermal shocks, monolithic refractories increase the overall lifespan of the refractory lining, reducing the need for frequent repairs. Moreover, monolithic refractories provide superior chemical resistance compared to traditional brick refractories. Iron and steel plants often face aggressive chemical environments due to the presence of molten metal, slag, and other corrosive substances. Monolithic refractories are specifically designed to withstand these harsh conditions, preventing chemical attacks and erosion of the refractory lining. As a result, the occurrence of unscheduled shutdowns due to refractory degradation is significantly reduced. Lastly, monolithic refractories offer better dimensional stability, minimizing the risk of cracks and spalling caused by thermal cycling and mechanical stress. This increased resistance to wear and tear ensures that the refractory lining remains intact for a longer period, reducing the frequency of maintenance and enhancing the overall operational efficiency of the iron and steel plant. In conclusion, monolithic refractories contribute to downtime reduction in iron and steel plants by providing faster installation, improved thermal insulation, superior chemical resistance, and enhanced dimensional stability. Their versatility and performance advantages make them a reliable choice for maintaining an efficient and dependable refractory lining, ultimately reducing the frequency and duration of plant shutdowns.
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Monolithic Refractories for Iron and Steel Industry - Mould Powders / Continuous Casting Powders and Granules
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT or LC
- Min Order Qty:
- 10 m.t.
- Supply Capability:
- 100000 m.t./month
OKorder Service Pledge
Quality Product, Order Online Tracking, Timely Delivery
OKorder Financial Service
Credit Rating, Credit Services, Credit Purchasing
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