Refractory Precast Shapes For EAF Roof
- Ref Price:
-
$1,262.61 - 1,543.19
/ m.t.
- Loading Port:
- China Main Port
- Payment Terms:
- TT or L/C
- Min Order Qty:
- 2 MT m.t.
- Supply Capability:
- 5000 Tons Per Month m.t./month
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General Information of Refractory Precast Shapes For EAF Roof
Made as per international standards, FIREF refractory pre-cast shapes for EAF roof is known for its excellent corrosion and scouring resistance of iron steel, long operating life and easy execution and mending. Further, the sizes could be customed.
Technical data of Refractory Precast Shapes For EAF Roof
Item | Refractory Precast Shapes For EAF Roof | |
Al2O3(%)≥ | 82 | |
MgO(%)≥ | — | |
CaO(%)≤ | 2 | |
SiO2(%)≤ | — | |
Fe2O3(%)≥ | — | |
Cr2O3 | — | |
Bulk Density （g/cm3）≥ | 110℃×24h | 2.9 |
1600℃×3h | — | |
C.C.S. (MPa)≥ | 110℃×24h | 30 |
1600℃×3h | — | |
M.O.R.(MPa)≥ | 110℃×24h | 6 |
1600℃×3h | — | |
Grain Size Distribution (%) | — | |
Heavy Burn Line Rate(1300℃×3h)(%) | — | |
Mould and Test Room of Refractory Precast Shapes For EAF Roof
Feature of Refractory Precast Shapes For EAF Roof
Excellent corrosion and scouring resistance of iron steel
Easy execution and mending
Application of Refractory Precast Shapes For EAF Roof
FIREF refractory pre-cast shapes for EAF roof can be used for in situ casting or pre-casting for tri-angle area of UHP EAF roof.
- Q: What are the common failure modes of monolithic refractories in iron and steel applications?
- Monolithic refractories are widely used in iron and steel applications due to their excellent thermal shock resistance, high temperature stability, and mechanical strength. However, like any other material, they are not immune to failure. There are several common failure modes associated with monolithic refractories in iron and steel applications. 1. Spalling: Spalling is one of the most common failure modes of monolithic refractories. It refers to the detachment of refractory material from the surface due to thermal cycling, mechanical stress, or chemical reactions. Spalling can occur due to mismatched thermal expansion coefficients between the refractory and the surrounding structure, leading to cracking and subsequent detachment. 2. Erosion: Erosion is another prevalent failure mode in iron and steel applications. It occurs when the refractory material is subjected to the erosive action of molten metal, slag, or gases. The erosion can be a result of the physical impact of the flowing metal or the chemical attack by corrosive slag components. Erosion leads to the loss of refractory material, decreased lining thickness, and compromised performance. 3. Corrosion: Corrosion is a significant failure mode in iron and steel applications, particularly in contact with aggressive atmospheres or molten metal. Corrosion can result from chemical reactions between the refractory material and the corrosive agents, such as oxides, sulfides, or alkalis present in the environment. It leads to the formation of corrosion products, which can weaken the refractory lining and reduce its lifespan. 4. Thermal shock: Monolithic refractories are exposed to extreme temperature fluctuations in iron and steel applications. Rapid heating or cooling can lead to thermal shock, causing cracking and failure of the refractory material. Thermal shock can occur due to uneven heating or cooling, sudden changes in temperature, or thermal gradients within the refractory lining. 5. Abrasion: In certain iron and steel applications, monolithic refractories can be subjected to abrasive wear. This occurs when the refractory lining comes into contact with solid particles, such as metallic oxides, slags, or raw materials. The repeated impact and rubbing action of these particles can cause erosion and abrasion of the refractory material, leading to its failure. To mitigate these failure modes, proper refractory selection, installation techniques, and maintenance practices are crucial. Regular inspection, repair of damaged areas, and application of protective coatings can help extend the lifespan and performance of monolithic refractories in iron and steel applications.
- Q: What are the challenges in using monolithic refractories in the iron and steel industry?
- One of the major challenges in using monolithic refractories in the iron and steel industry is their susceptibility to thermal shock. Monolithic refractories, unlike traditional brick refractories, are made from a single material and do not have the same structural integrity. This makes them more prone to cracking and failure when exposed to rapid temperature changes, which are common in the iron and steel production processes. Another challenge is the difficulty in achieving consistent and uniform application of monolithic refractories. Unlike brick refractories that can be precisely shaped and fitted into the desired areas, monolithic refractories are typically applied as a mortar-like mixture that is poured or sprayed into place. This process can be more complex and requires skilled operators to ensure proper application and adhesion. Additionally, monolithic refractories tend to have a shorter lifespan compared to brick refractories. They are more susceptible to erosion and wear, especially in high-temperature environments and when exposed to harsh chemicals and slag. This means that regular maintenance and replacement of monolithic refractories are necessary, which can result in increased downtime and costs for the iron and steel industry. Furthermore, the selection and customization of monolithic refractories can be challenging. Due to the wide range of operating conditions and requirements in the iron and steel industry, finding the right monolithic refractory composition and design that can withstand the specific demands of each application can be difficult. This requires careful consideration of factors such as temperature, chemical composition, and mechanical stress. Overall, while monolithic refractories offer advantages such as ease of installation and versatility, their susceptibility to thermal shock, difficulty in achieving uniform application, shorter lifespan, and the need for customized selection pose challenges for their effective use in the iron and steel industry.
- Q: In iron and steel industry, the main raw materials for blast furnace ironmaking are iron ore, coke and limestone. What's the use of limestone here?
- At high temperatures, limestone (calcium carbonate) breaks down into lime (calcium oxide, which is useful) and carbon dioxide.
- Q: How do monolithic refractories contribute to the overall efficiency of ladle slagging operations?
- Monolithic refractories play a vital role in enhancing the overall efficiency of ladle slagging operations, which involve removing impurities from molten metal in a ladle before pouring it into molds or further processing. One of the primary benefits of monolithic refractories is their capacity to withstand high temperatures, a crucial factor in ladle slagging operations. The refractory lining in the ladle must endure the intense heat generated by the molten metal and slag, as well as the chemical reactions occurring during the process. By possessing high thermal stability, monolithic refractories prevent the lining from cracking or deteriorating, thus ensuring the integrity of the ladle and maintaining its efficiency. Furthermore, monolithic refractories offer excellent resistance against chemical erosion and corrosion. In the ladle slagging process, the molten metal and slag may contain impurities and aggressive chemicals such as sulfur, phosphorus, and other oxides. These substances can attack and degrade the lining of the ladle, compromising its efficiency. However, monolithic refractories are specifically designed to withstand these chemical attacks, thereby prolonging the lifespan of the ladle and reducing the need for frequent repairs or replacements. Moreover, monolithic refractories possess exceptional thermal insulation properties. Precise temperature control is essential in ladle slagging operations to facilitate desired chemical reactions and efficient impurity removal. The thermal insulation provided by monolithic refractories helps maintain a consistent temperature within the ladle, preventing heat loss and facilitating optimal slagging conditions. Additionally, this insulation minimizes energy consumption and improves the overall energy efficiency of the ladle slagging process. In conclusion, monolithic refractories make significant contributions to the overall efficiency of ladle slagging operations. Their ability to endure high temperatures, resist chemical erosion, and provide thermal insulation ensures the integrity and longevity of the ladle. By reducing the need for frequent repairs and enabling precise temperature control, monolithic refractories optimize the slagging process, leading to enhanced productivity and cost-effectiveness.
- Q: How do monolithic refractories contribute to the reduction of heat loss in iron and steel plants?
- Monolithic refractories play a crucial role in reducing heat loss in iron and steel plants due to their unique properties and application methods. These refractories are composed of single, continuous materials with no joints or seams, allowing for excellent thermal insulation and minimizing heat transfer. One way monolithic refractories contribute to heat loss reduction is through their low thermal conductivity. These materials have a high resistance to heat flow, which means they can effectively prevent the loss of thermal energy from the walls and linings of furnaces, ladles, and other equipment used in iron and steel production. By providing a barrier between the hot interior and the cooler surroundings, monolithic refractories minimize heat escape and maintain a more stable and efficient thermal environment. Additionally, monolithic refractories are known for their excellent adhesion and high strength, which enables them to form a tight seal and eliminate gaps or cracks in the lining of the equipment. This prevents the ingress of cold air or the escape of hot gases, further reducing heat loss and ensuring the desired operating temperatures are maintained. Furthermore, monolithic refractories can be easily applied and repaired, allowing for a more efficient and cost-effective maintenance process. Regular inspections and repairs can be carried out to address any wear or damage to the refractory lining, ensuring its optimal performance and minimizing heat loss over time. In summary, monolithic refractories contribute to the reduction of heat loss in iron and steel plants through their low thermal conductivity, excellent adhesion, and high strength. By effectively insulating the equipment and preventing heat escape, these refractories contribute to a more energy-efficient and productive operation in the iron and steel industry.
- Q: How do monolithic refractories withstand thermal shock and mechanical stress?
- Monolithic refractories are engineered to endure high temperatures and harsh working conditions, making them perfect for applications involving thermal shock and mechanical stress. To begin with, monolithic refractories are designed with a high thermal conductivity, enabling them to rapidly absorb and distribute heat. This characteristic aids in reducing thermal gradients within the material and decreasing the likelihood of thermal shock. When faced with sudden temperature changes, the refractory material expands and contracts uniformly, preventing the formation of cracks and fractures. Additionally, these refractories possess exceptional thermal shock resistance due to their low thermal expansion coefficient. As a result, they are less prone to expanding or contracting when exposed to temperature fluctuations. Consequently, they can endure rapid temperature changes without suffering significant structural damage. Furthermore, monolithic refractories exhibit high mechanical strength, enabling them to withstand various forms of mechanical stress. Their formulation includes carefully selected raw materials and additives that enhance their load-bearing capacity and resistance to mechanical forces. This grants them the ability to bear the weight of surrounding materials and endure any external forces or vibrations present in the application environment. Moreover, monolithic refractories maintain good structural integrity and stability thanks to their dense and compact microstructure. Typically, these materials are created by combining fine powders, binders, and additives, which are mixed and shaped to form a solid and cohesive structure. This structure provides resistance against mechanical stress, preventing the refractories from crumbling or disintegrating under pressure. In conclusion, monolithic refractories withstand thermal shock and mechanical stress due to their high thermal conductivity, low thermal expansion coefficient, strong mechanical strength, and structural integrity. These properties establish them as reliable and durable materials for applications that require resistance to extreme temperatures and challenging operating conditions.
- Q: How do monolithic refractories withstand mechanical stress in the iron and steel industry?
- Monolithic refractories are designed to endure mechanical stress in the iron and steel industry due to their distinctive composition and properties. Unlike traditional brick-like refractories, which consist of multiple pieces, these refractories have a single, uniform structure. This monolithic structure offers several advantages in terms of mechanical stress resistance. To begin with, monolithic refractories possess greater strength and density compared to traditional refractories. This enables them to withstand the mechanical forces exerted during various processes in the iron and steel industry, such as the movement of molten metal, the impact of scrap materials, or the pressure from gases and liquids. Their superior strength and density help prevent cracking, deformation, or failure under these stressful conditions. Moreover, monolithic refractories provide excellent resistance to thermal shock, which is crucial in the iron and steel industry. The rapid heating and cooling cycles experienced in processes like steelmaking or iron casting can subject refractories to thermal stress. However, the monolithic structure of these refractories allows for better thermal conductivity and expansion, reducing the risk of thermal shock damage. This ability to withstand thermal stress contributes to their overall resistance to mechanical stress. Furthermore, monolithic refractories can be customized and applied on-site, resulting in a seamless lining that eliminates joints or weak spots. This seamless application ensures a more uniform distribution of stress and prevents the formation of cracks or gaps that could weaken the refractory lining. By eliminating these vulnerabilities, monolithic refractories enhance their ability to resist mechanical stress in the demanding conditions of the iron and steel industry. In conclusion, monolithic refractories endure mechanical stress in the iron and steel industry due to their high strength and density, superior resistance to thermal shock, and seamless application. These properties enable them to withstand the intense mechanical forces encountered during various processes, ensuring the durability and efficiency of refractory linings in this demanding industry.
- Q: How do monolithic refractories enhance the performance of ladle and tundish covers?
- The performance of ladle and tundish covers is significantly improved by the utilization of monolithic refractories. There are several ways in which this enhancement is achieved. Primarily, monolithic refractories possess remarkable thermal insulation properties. The steelmaking process subjects ladles and tundishes to extreme temperatures. Through the use of monolithic refractories, the covers effectively trap and retain heat, preventing excessive heat loss. This insulation ability not only helps maintain the desired temperature of the molten steel but also reduces the energy consumption required for heating. Secondly, monolithic refractories demonstrate exceptional resistance to thermal shock. When ladles and tundishes are filled with molten steel, there is a rapid and drastic temperature change in the refractory lining. This sudden shift can cause cracking and spalling of the lining, jeopardizing its integrity. However, monolithic refractories possess high thermal shock resistance, enabling them to endure these abrupt temperature fluctuations without significant damage. This ensures the longevity and durability of the ladle and tundish covers. Additionally, monolithic refractories exhibit excellent corrosion resistance. The presence of molten steel and other corrosive substances in ladles and tundishes can erode the refractory lining over time. Nonetheless, monolithic refractories are specifically engineered to withstand these corrosive environments, shielding the covers from chemical attack and erosion. This corrosion resistance enhances the lifespan of the ladle and tundish covers, reducing the need for frequent replacements and associated downtime. Furthermore, monolithic refractories provide good mechanical strength and stability. Ladles and tundishes undergo various mechanical stresses, including the weight of the molten steel, thermal expansions, and vibrations. The use of monolithic refractories furnishes the necessary strength and stability to endure these mechanical forces, averting structural failures and maintaining the integrity of the covers. To summarize, monolithic refractories heighten the performance of ladle and tundish covers by providing exceptional thermal insulation, resistance to thermal shock and corrosion, and sufficient mechanical strength. These properties guarantee efficient steelmaking processes, diminish maintenance costs, and extend the lifespan of ladles and tundishes.
- Q: How are monolithic refractories installed in iron and steel production processes?
- The installation of monolithic refractories in iron and steel production processes necessitates various methods depending on the specific application and requirements. The installation process typically encompasses the subsequent steps: 1. Surface Preparation: Prior to installing monolithic refractories, it is imperative to adequately prepare the surface where they will be applied. This involves cleansing and eliminating any loose materials, dust, or contaminants from the substrate. 2. Mixing: Monolithic refractories comprise diverse materials, including aggregates, binders, and additives. These constituents are blended in specific proportions to attain the desired properties and consistency. The mixing process can be executed manually or using mechanical mixers. 3. Application: Various techniques exist for applying monolithic refractories, such as gunning, casting, ramming, and troweling. The chosen method is contingent upon factors such as the structure's shape, accessibility, and required thickness. - Gunning: This technique entails utilizing a gunning machine to spray the refractory material onto the surface. It is frequently employed for repairing or patching existing linings or for swift installation in hard-to-reach areas. - Casting: In casting, the refractory material is poured into molds or forms and allowed to solidify and harden. This method is suitable for fabricating intricate shapes and large-sized components. - Ramming: Ramming involves manually or mechanically compacting the refractory material into a mold or form using a ramming tool. This approach is commonly employed for lining induction furnaces, ladles, and other equipment. - Troweling: Troweling is a manual method wherein the refractory material is applied and smoothed using a trowel. It is frequently utilized for minor repairs or touch-ups. 4. Curing: Subsequent to the application of the refractory material, curing is necessary to attain its optimal strength and performance. Curing involves allowing the material to dry and harden at a controlled temperature and humidity for a specified duration. This step is crucial to ensure the monolithic refractory lining's long-term durability and resistance. In conclusion, the installation of monolithic refractories in iron and steel production processes necessitates meticulous preparation, proper mixing, and the appropriate application technique. It is imperative to adhere to manufacturer guidelines and industry best practices to ensure a successful installation that fulfills the specific requirements of the production process.
- Q: What are the key properties of pumpable refractories used for monolithic refractory applications?
- The key properties of pumpable refractories used for monolithic refractory applications include high flowability, good workability, excellent bonding strength, and high resistance to thermal shock. These pumpable refractories should also possess good pumpability and be able to withstand the intense heat and mechanical stress in the application environment. Additionally, they should have low water demand, high chemical resistance, and the ability to maintain their properties even after exposure to high temperatures.
Our products are mainly mullite brick, high alimina brick acid-resistant refractory brick, phosphate abrasive brick and andalusite brick, with annual output of 20000 tons heavy refractory, the tunnel kiln with 80m in length is mainly for manufacturing of top quality refractory, such as corundum products, alumina products and spinel products. In order to promote sustainable development, we will insist on scientific development.
1. Manufacturer Overview
| Location | Henan, China |
| Year Established | 2007 |
| Annual Output Value | Above US$ 60 Million |
| Main Markets | Mid East; Eastern Europe; North America |
| Company Certifications | ISO 9001:2008 |
2. Manufacturer Certificates
| a) Certification Name | |
| Range | |
| Reference | |
| Validity Period |
3. Manufacturer Capability
| a) Trade Capacity | |
| Nearest Port | Tianjin |
| Export Percentage | 31% - 50% |
| No.of Employees in Trade Department | 21-50 People |
| Language Spoken: | English; Chinese |
| b) Factory Information | |
| Factory Size: | Above 36,000 square meters |
| No. of Production Lines | Above 5 |
| Contract Manufacturing | OEM Service Offered |
| Product Price Range | Average |
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Refractory Precast Shapes For EAF Roof
- Ref Price:
-
$1,262.61 - 1,543.19
/ m.t.
- Loading Port:
- China Main Port
- Payment Terms:
- TT or L/C
- Min Order Qty:
- 2 MT m.t.
- Supply Capability:
- 5000 Tons Per Month 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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