Monolithic Refractories for Iron and Steel Industry - Hot-dip Zinc Coating Steel Building Roof Walls with Excellent Process Capability
- Ref Price:
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- Loading Port:
- China main port
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 50 m.t.
- Supply Capability:
- 10000 m.t./month
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Hot-dip Zinc Coating Steel Building Roof Walls--Excellent Process Capability
1.Structure of Hot-Dip Galvanized Steel Sheet Description：
Hot-dip galvanized steel coils are available with a pure zinc coating through the hot-dip galvanizing process. It offers the economy, strength and formability of steel combined with the corrosion resistance of zinc. The hot-dip process is the process by which steel gets coated in layers of zinc to protect against rust. It is especially useful for countless outdoor and industrial applications. Production of cold formed corrugated sheets and profiles for roofing, cladding, decking, tiles, sandwich walls, rainwater protective systems, air conditioning duct as well as electrical appliances and engineering.
2.Main Features of the Hot-Dip Galvanized Steel Sheet：
• Excellent process capability
• Smooth and flat surface
• Workability, durability
• Good visual effect
3.Hot-Dip Galvanized Steel Sheet Images
4.Hot-Dip Galvanized Steel Sheet Specification
Standard: ASTM, JIS,EN
Grade: CS, DX51D+Z,SGCC, SS 230~550,S220GD+Z~S550GD+Z, SGC340~SGC570
Thickness: 0.18mm~5mm
Width: max 2000mm
Coil weight:3-12 MT
Coil ID:508/610mm
Surface structure: zero spangle, regular spangle or minimum spangle
Surface treatment: Chromate treatment, Oiled/dry, skinpassed/non-skinpassed
5.FAQ of Hot-Dip Galvanized Steel Sheet
1.How to guarantee the quality of the products？
We have established the international advanced quality management system，every link from raw material to final product we have strict quality test.
2. How long can we receive the product after purchase?
Usually within thirty working days after receiving buyer’s advance payment or LC. We will arrange the factory manufacturing as soon as possible. The cargo readiness usually takes 15-30 days, but the shipment will depend on the vessel situation.
- Q:How are monolithic refractories inspected and tested for quality assurance?
- To ensure the reliability and performance of monolithic refractories, a series of rigorous processes are conducted for quality assurance. These inspections and tests play a crucial role in maintaining consistent quality standards and identifying any potential defects or weaknesses in the refractory material. The first step involves conducting visual inspections to check for visible defects such as cracks, spalling, or signs of poor manufacturing. This helps in identifying any obvious issues that may affect the refractory's performance. Following that, specialized equipment is used to measure physical properties such as density, porosity, and thermal conductivity. These measurements are then compared against predetermined standards to ensure that the refractory material meets the required specifications. Density and porosity are important indicators of the refractory's strength and resistance to heat and chemicals, while thermal conductivity determines its ability to efficiently transfer heat. Moreover, mechanical tests are performed to assess the refractory's strength and resistance to mechanical stress. This involves subjecting the material to compressive, tensile, and flexural forces to evaluate its structural integrity and durability. To ensure the refractory's suitability for high-temperature environments, thermal tests are conducted. These tests involve exposing the refractory to extreme temperatures and monitoring its behavior. Parameters such as thermal expansion and shrinkage, resistance to thermal shock, and thermal cycling are evaluated during these tests. Chemical analysis is another important aspect of quality assurance for monolithic refractories. Samples of the refractory material are analyzed to determine their chemical composition and assess their resistance to various corrosive environments. This analysis helps ensure that the refractory is suitable for the specific applications it will be used in. Finally, field tests may be conducted at actual operating sites to evaluate the refractory's performance under real-world conditions. These tests involve monitoring the refractory's behavior in terms of wear and tear, thermal insulation, and resistance to chemical attack. The results obtained from field tests are crucial in validating the refractory's performance and making any necessary adjustments to the manufacturing process. In conclusion, monolithic refractories undergo a comprehensive inspection and testing process that includes visual inspections, physical and mechanical tests, thermal analysis, chemical analysis, and field tests. This systematic approach guarantees that the refractories meet the required quality standards, providing reliability and durability in the demanding environments they are designed for.
- Q:How do monolithic refractories withstand the thermal cycling in coke oven applications?
- Monolithic refractories are specifically designed to withstand the harsh conditions of thermal cycling in coke oven applications. Thermal cycling refers to the repetitive heating and cooling cycles that occur in these high-temperature environments. One of the key factors that enables monolithic refractories to withstand thermal cycling is their composition. They are typically made from a combination of different refractory materials, such as high-alumina, silica, and magnesia, which provide excellent thermal shock resistance. These materials have low thermal conductivity and high thermal expansion properties, allowing them to expand and contract without cracking or spalling under extreme temperature changes. Moreover, monolithic refractories have excellent bonding and adhesion properties, allowing them to form a strong and cohesive structure. This ensures that they can withstand the mechanical stresses caused by the thermal cycling process. Additionally, monolithic refractories can be installed in place through various techniques, such as gunning, casting, or ramming, which further enhances their resistance to thermal cycling. Furthermore, the presence of specialized additives and bonding agents in monolithic refractories improves their resistance to thermal cycling. These additives can enhance the refractory's ability to absorb thermal shock and minimize cracking, thus increasing its durability and longevity in coke oven applications. Overall, monolithic refractories' ability to withstand thermal cycling in coke oven applications can be attributed to their carefully formulated composition, strong bonding properties, and the incorporation of specialized additives. These characteristics make them highly reliable and suitable for the extreme temperature fluctuations experienced in coke oven operations.
- Q:How do monolithic refractories resist erosion from molten metals and slags?
- Monolithic refractories are designed to resist erosion from molten metals and slags through various mechanisms. Firstly, monolithic refractories are made from high-quality materials such as alumina, magnesia, and silica. These materials have excellent resistance to high temperatures and chemical attack, making them capable of withstanding the corrosive nature of molten metals and slags. Secondly, monolithic refractories have a dense structure that prevents the penetration of molten metals and slags. The dense matrix of the refractory material acts as a physical barrier, limiting the contact between the molten material and the refractory itself. Furthermore, monolithic refractories can also contain additives or binders that enhance their erosion resistance. These additives can include silicon carbide, graphite, or other materials that provide additional strength and resistance to erosion. In addition, monolithic refractories can be designed with specific shapes and features to minimize erosion. For example, the refractory lining in a furnace may be designed with curved shapes or baffles to redirect the flow of molten metals and slags, reducing their impact on the refractory surface. Overall, the combination of high-quality materials, dense structure, additives, and tailored designs allows monolithic refractories to effectively resist erosion from molten metals and slags. This resistance ensures the durability and longevity of refractory linings in industrial applications where high temperatures and corrosive environments are present.
- Q:What are the environmental considerations associated with monolithic refractories?
- Monolithic refractories, which are used in various high-temperature applications, have several environmental considerations that need to be taken into account. Firstly, the production of monolithic refractories involves the use of raw materials such as clay, silica, and alumina, which are often mined from the earth. The extraction of these materials can result in habitat destruction, soil erosion, and water pollution. Additionally, the manufacturing process of monolithic refractories typically involves high-energy consumption and the release of greenhouse gases. The firing of refractory materials requires high temperatures, often achieved through the burning of fossil fuels, which contributes to carbon dioxide emissions and climate change. These emissions can have far-reaching environmental impacts, including air pollution, acid rain, and the depletion of the ozone layer. Furthermore, the disposal of monolithic refractories at the end of their useful life can also pose environmental challenges. While monolithic refractories are highly durable and long-lasting, there may come a point when they need to be replaced or repaired. The disposal of refractory waste can be problematic, as it often contains hazardous materials like chromium, lead, and asbestos. Improper disposal methods can lead to soil and water contamination, posing risks to human health and the environment. To address these environmental considerations, efforts are being made to develop more sustainable refractory materials and manufacturing processes. For instance, alternative raw materials like recycled refractory materials or industrial by-products can be used to reduce the environmental impact of mining. Furthermore, the adoption of more energy-efficient manufacturing techniques, such as utilizing renewable energy sources or implementing advanced firing technologies, can help to minimize greenhouse gas emissions. In conclusion, the environmental considerations associated with monolithic refractories include habitat destruction, energy consumption, greenhouse gas emissions, and waste disposal. It is crucial for the refractory industry to prioritize sustainability and adopt measures to mitigate these environmental impacts, such as using alternative raw materials, improving manufacturing processes, and promoting responsible waste management practices.
- Q:What are the specific requirements of monolithic refractories for ladle transfer applications?
- Monolithic refractories for ladle transfer applications need to have high thermal shock resistance, excellent corrosion resistance, and good thermal conductivity. They should also have low porosity to prevent molten metal penetration and maintain their structural integrity. Additionally, these refractories should possess good erosion resistance and be able to withstand the mechanical stresses of ladle transfer operations.
- Q:How do monolithic refractories resist corrosion and erosion in the iron and steel industry?
- Monolithic refractories in the iron and steel industry are designed to resist corrosion and erosion through a combination of their composition and application techniques. Firstly, the composition of monolithic refractories includes high-quality raw materials such as alumina, magnesia, and silica. These materials possess excellent resistance to corrosion and erosion. Alumina, for example, is highly resistant to chemical attack and can withstand high temperatures, making it ideal for protecting against the corrosive nature of the iron and steel industry. In addition to the choice of materials, the application techniques used in installing monolithic refractories also play a crucial role in their resistance to corrosion and erosion. Monolithic refractories are typically installed using various methods such as gunning, ramming, or casting. These techniques ensure a tight and seamless bond between the refractory and the steel structure, minimizing the chances of corrosion and erosion. Furthermore, monolithic refractories can be customized to suit the specific needs of different parts of the iron and steel industry. For example, areas exposed to molten metal require refractories with high thermal conductivity and excellent resistance to chemical attack. By tailoring the refractory to the specific application, it becomes more effective in resisting corrosion and erosion. Moreover, monolithic refractories are often designed with additives or binders that enhance their resistance to corrosion and erosion. These additives can provide additional protection against chemical attacks from molten metal or corrosive gases, making the refractory even more durable in harsh conditions. Overall, monolithic refractories resist corrosion and erosion in the iron and steel industry due to their composition, application techniques, customization, and the inclusion of additives. By combining these factors, monolithic refractories provide excellent protection to the steel structures, ensuring their longevity and efficiency in the challenging environments of the iron and steel industry.
- Q:How do monolithic refractories enhance the efficiency of reheating furnaces?
- Monolithic refractories play a crucial role in enhancing the efficiency of reheating furnaces in several ways. Firstly, monolithic refractories offer excellent thermal insulation properties, which minimize heat losses from the furnace. This insulation helps to maintain a high and consistent temperature inside the furnace, reducing the need for excessive fuel consumption and improving energy efficiency. Secondly, monolithic refractories have high thermal conductivity, which allows for efficient heat transfer within the furnace. This means that the heat generated by the burners can be evenly distributed throughout the furnace, ensuring uniform heating of the materials being reheated. This uniform heating not only enhances the overall efficiency but also helps to prevent hot spots or cold spots, which can negatively impact the quality of the reheated products. Moreover, monolithic refractories have excellent resistance to thermal shock and mechanical stress. Reheating furnaces often undergo rapid temperature changes and are subjected to intense mechanical forces due to the movement of materials and the operation of various equipment. The use of monolithic refractories helps to prevent cracks, spalling, and other forms of refractory damage, thus ensuring the longevity and continuous operation of the furnace without interruptions for repairs. Additionally, monolithic refractories offer ease of installation, repair, and maintenance compared to traditional brick refractories. Their ability to be cast or sprayed onto the furnace lining allows for a more precise and seamless installation, reducing the risk of weak joints or gaps that could compromise the furnace's efficiency. Furthermore, in case of any damage or wear, monolithic refractories can be easily repaired or patched up, minimizing downtime and improving the overall productivity of the furnace. In summary, the use of monolithic refractories in reheating furnaces enhances efficiency by providing effective thermal insulation, facilitating uniform heat distribution, resisting thermal shock and mechanical stress, and allowing for easier installation and maintenance. These benefits contribute to lower energy consumption, improved product quality, increased furnace durability, and reduced operational costs.
- Q:What are the specific requirements of monolithic refractories for ladle purging applications?
- The specific requirements of monolithic refractories for ladle purging applications include high thermal shock resistance, excellent erosion resistance, good slag resistance, and low porosity. Thermal shock resistance is crucial in ladle purging applications as the refractory material needs to withstand rapid temperature changes without cracking or spalling. This is particularly important during ladle purging, where the ladle is exposed to high temperatures during molten metal pouring and then quickly cooled down during purging. Erosion resistance is another important requirement for monolithic refractories in ladle purging applications. The refractory material should be able to withstand the erosive action of molten metal streams and metalloids during purging. It should have a high resistance to chemical attack, preventing the material from deteriorating or eroding away. Slag resistance is also necessary for monolithic refractories used in ladle purging. The refractory material should have good resistance to the corrosive effects of slag, which can be present in ladles during purging. Slag can cause chemical reactions that can degrade the refractory material, leading to premature failure. Low porosity is an essential requirement for monolithic refractories in ladle purging applications. Low porosity ensures that the refractory material is impermeable to molten metal, preventing it from infiltrating the material and causing damage. This also helps to maintain the integrity and performance of the refractory lining during ladle purging. Overall, monolithic refractories for ladle purging applications need to exhibit high thermal shock resistance, excellent erosion resistance, good slag resistance, and low porosity to ensure the durability and longevity of the refractory lining in ladles during purging operations.
- Q:What are the common failure mechanisms of monolithic refractories in the iron and steel industry?
- Common failure mechanisms of monolithic refractories in the iron and steel industry include: 1. Thermal spalling: Monolithic refractories are exposed to extreme temperature changes during the iron and steel production process. These rapid temperature fluctuations can cause the refractory material to expand and contract, leading to thermal stress and ultimately spalling. This failure mechanism is particularly common in areas where the refractory is exposed to high temperatures, such as in the hot face of a furnace. 2. Chemical attack: The iron and steel production process involves the use of various chemicals and molten metal, which can react with the refractory material over time. Chemical attack can cause the refractory to deteriorate, leading to cracks, erosion, and ultimately failure. Common culprits include slag, alkalis, sulfur, and other impurities present in the production environment. 3. Abrasion: The movement of materials, such as iron ore, coke, and fluxes, can cause abrasion on the refractory lining. This mechanical wear and tear can weaken the refractory material, leading to its failure. Abrasion is particularly prevalent in areas that experience high material flow rates or turbulence, such as in the taphole or launder systems. 4. Corrosion: Monolithic refractories can be subjected to corrosion from the gases, liquids, and solids present in the iron and steel production environment. Corrosion can occur due to the presence of oxygen, water vapor, and various chemical species, such as carbon monoxide and sulfur compounds. It can lead to the formation of corrosive products, such as oxides or sulfides, which degrade the refractory material over time. 5. Mechanical stress: Monolithic refractories may experience mechanical stress due to factors like thermal expansion and contraction, vibration, or mechanical impact. Excessive mechanical stress can cause cracks or fractures in the refractory lining, compromising its integrity and leading to failure. To mitigate these failure mechanisms, proper selection of refractory materials, regular inspection, and maintenance are crucial. Additionally, designing refractory linings considering the specific operational conditions and using appropriate installation techniques can help enhance their performance and lifespan in the iron and steel industry.
- Q:How do monolithic refractories improve the performance of ladles and tundishes?
- The performance of ladles and tundishes is significantly improved by monolithic refractories in various ways. Firstly, these vessels are thermally insulated by monolithic refractories, which act as a barrier against heat loss and help maintain the desired temperature. This insulation reduces energy consumption and minimizes heat loss. Secondly, monolithic refractories offer excellent resistance to chemical corrosion and erosion. When ladles and tundishes come into contact with molten metal and fluxes, they can be severely corroded and eroded. However, the use of monolithic refractories protects against chemical attacks and extends the lifespan of these vessels. This saves costs associated with frequent repairs or replacements and ensures their integrity and safety. Furthermore, monolithic refractories provide superior mechanical strength and structural stability. Ladles and tundishes must withstand the weight of molten metal and the stresses caused during pouring and handling. With high mechanical strength, monolithic refractories can withstand these loads, maintaining their shape and integrity. This reduces downtime and increases productivity in the steelmaking process. Moreover, monolithic refractories offer flexibility in design and installation. They can be shaped and applied in various configurations, allowing customization to meet the specific requirements of ladles and tundishes. This flexibility ensures a better fit and improves the overall efficiency of the refractories, ultimately enhancing the performance of the vessels. In conclusion, monolithic refractories enhance the performance of ladles and tundishes by providing improved thermal insulation, resistance to chemical corrosion and erosion, increased mechanical strength, and flexibility in design and installation. These benefits contribute to the longevity, efficiency, and cost-effectiveness of ladles and tundishes in steelmaking operations.
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Monolithic Refractories for Iron and Steel Industry - Hot-dip Zinc Coating Steel Building Roof Walls with Excellent Process Capability
- Ref Price:
-
- Loading Port:
- China main port
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 50 m.t.
- Supply Capability:
- 10000 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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