Refractory Brick purging plug for BOF and EAF
- Ref Price:
-
- Loading Port:
- Shanghai
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 10 set
- Supply Capability:
- 50000 set/month
OKorder Service Pledge
Quality Product, Order Online Tracking, Timely Delivery
OKorder Financial Service
Credit Rating, Credit Services, Credit Purchasing
You Might Also Like
purging plug Raw materials
Ladle permeable brick has been in the leading position in domestic and abroad over years. We have developed the series of corundum, chromium corundum, low silicon chromium corundum and corundum spinel one after another.
Customized purging plug
They can be designed and produced types of straight hole, directional slit, directional labyrinth, girth shape and interior and exterior integral split etc according to users’ request. Permeable flow rate of products can be designed upon customers’ request and can be adjusted in a wide range. The blowing opening rate is high.
purging plug Characters
Continuous casting Ladle Porous Block
High alumina and MgO content
High stability.
Thermal shock resisitance.
High life span
purging plug Physical and chemical indexes
Brand | TQZ-1 | TQZ-2 | |
Chemical composition/%,≥ | Al2O3+Cr2O3 | 92 | |
Al2O3+MgO | 92 | ||
Bulk density g/cm³ ≥ | 3 | 3 | |
Crushing strength /Mpa≥ | 1500°C×3h | 100 | 80 |
Modulus of rupture/Mpa≥ | 1500°C×3h | 20 | 15 |
Firing linear change % | 1500°C×3h | 0~+0.3 | 0~+0.4 |
Penetration gas flux (0.4Mpa)/m³ h-1 | 12~60 | 12~60 | |
Factory productivity
Based on 180,000 TON annual productivity and advanced production equipment, we have build deep cooperation relationship with Vietnam, Nigeria, Tailand, Saudi Arabia, Iran, Turkey, etc.
- 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 quality control measures for monolithic refractories in the iron and steel industry?
- In the iron and steel industry, the quality control measures for monolithic refractories are essential to ensure the efficiency and safety of the production process. These measures involve various inspections and tests throughout the manufacturing and installation stages. Firstly, the raw materials used for monolithic refractories undergo rigorous testing. This includes analyzing the chemical composition, particle size distribution, and impurity content. These tests ensure that the ingredients meet the required specifications and are suitable for the intended application. During the production process, quality control measures focus on monitoring the mixing and blending of the materials. This ensures a homogeneous mixture and avoids any inconsistencies in the final product. The density and viscosity of the refractory castables or plastics are also checked to maintain the desired physical properties. Once the monolithic refractories are manufactured, they undergo several tests to evaluate their performance characteristics. These tests can include determining the cold crushing strength, modulus of rupture, and thermal conductivity. These properties are critical to ensure the refractories can withstand the extreme temperatures and mechanical stress present in the iron and steel industry. In addition to laboratory testing, quality control measures involve on-site inspections during installation. This includes verifying the correct application techniques, such as proper vibration, curing, and drying procedures. It is important to ensure that the monolithic refractories are applied correctly to achieve optimal performance and longevity. Furthermore, regular sampling and monitoring of the refractories' performance during operation are carried out. This allows for the detection of any signs of degradation or wear, enabling proactive maintenance and replacement before any significant issues arise. Overall, the quality control measures for monolithic refractories in the iron and steel industry involve comprehensive testing, monitoring, and inspection procedures. These measures aim to guarantee the reliability, durability, and efficiency of the refractories, ultimately contributing to the smooth operation of the iron and steel production processes.
- Q: What are the main factors affecting the thermal expansion of monolithic refractories?
- The main factors affecting the thermal expansion of monolithic refractories include the type of refractory material, the temperature range, the chemical composition, and the physical structure of the refractory. Firstly, the type of refractory material plays a significant role in its thermal expansion behavior. Different types of refractories, such as alumina-based, silica-based, and magnesia-based refractories, have varying coefficients of thermal expansion (CTE). For example, alumina-based refractories generally have a lower CTE compared to silica-based refractories. Therefore, the choice of refractory material can greatly influence its thermal expansion characteristics. Secondly, the temperature range at which the refractory is exposed affects its thermal expansion. As the temperature increases, the refractory material expands due to the thermal energy absorbed. However, different refractories have different temperature-dependent expansion behaviors. Some refractories may have a linear or near-linear expansion with temperature, while others may exhibit non-linear or step-wise expansion. The temperature range of operation is an important consideration in determining the suitability of a refractory for a particular application. The chemical composition of the refractory also affects its thermal expansion. The presence of different chemical elements and compounds in the refractory material can influence its expansion behavior. For example, the addition of certain oxides, such as magnesia or zirconia, can alter the CTE of the refractory. Similarly, impurities or variations in the chemical composition can introduce differences in expansion characteristics among refractories of the same type. Lastly, the physical structure of the refractory, including its porosity, density, and microstructure, can affect thermal expansion. The presence of open or closed pores within the refractory can affect its ability to expand uniformly under thermal stress. The density of the refractory also plays a role, as denser refractories tend to have lower thermal expansion. Additionally, the microstructure, including grain size and orientation, can influence the overall expansion behavior of the refractory. In conclusion, the main factors affecting the thermal expansion of monolithic refractories include the type of refractory material, temperature range, chemical composition, and physical structure. Understanding these factors is essential in selecting the appropriate refractory for a specific application to ensure optimal performance and durability.
- Q: How do monolithic refractories impact the overall productivity of iron and steel operations?
- The overall productivity of iron and steel operations is greatly enhanced by monolithic refractories. These refractories are specifically designed to withstand extreme temperatures, chemical reactions, and mechanical stress that occur during production. One important way that monolithic refractories impact productivity is by reducing downtime and increasing operational efficiency. These refractories have high thermal conductivity and are resistant to thermal shock, allowing them to maintain stable temperatures within the furnace. This prevents sudden temperature fluctuations that can lead to equipment failure and production delays. As a result, the production process can continue uninterrupted, leading to increased productivity. Furthermore, monolithic refractories offer superior corrosion resistance, preventing the erosion and degradation of furnace linings. This resistance to chemical attacks from molten metals and slag helps prolong the lifespan of the refractory lining, reducing the need for repairs and replacements. This leads to less downtime and higher productivity for iron and steel operations. Additionally, monolithic refractories enable faster installation and repair processes compared to traditional brick refractories. They have a fluid-like consistency that makes application and shaping easy, resulting in shorter installation and curing times. This quick turnaround time minimizes production interruptions during repairs or maintenance, further increasing overall productivity. Moreover, the use of monolithic refractories can optimize energy consumption in iron and steel operations. Their excellent insulation properties help retain heat within the furnace, reducing heat loss and energy waste. This improves energy efficiency and leads to cost savings, ultimately contributing to increased productivity and profitability. In conclusion, monolithic refractories have a significant impact on the productivity of iron and steel operations. Their ability to withstand extreme conditions, reduce downtime, resist corrosion, facilitate quick repairs, and optimize energy consumption all contribute to improved efficiency and productivity in the industry.
- Q: How do monolithic refractories resist high temperatures?
- Monolithic refractories resist high temperatures due to their unique composition and structure. These refractories are made from a single material or a blend of materials, such as alumina, silica, and magnesia, which have high melting points and can withstand extreme heat. Additionally, their monolithic nature eliminates joints and seams, reducing the risk of thermal shock and allowing them to adapt to thermal expansion and contraction. Their dense and compact structure also minimizes porosity, preventing the penetration of heat and ensuring their durability under high-temperature conditions.
- Q: How do monolithic refractories improve the efficiency of ladle and tundish purging furnaces?
- Monolithic refractories improve the efficiency of ladle and tundish purging furnaces by providing better insulation, reducing heat loss, and enhancing the overall thermal efficiency of the furnaces. These refractories have high thermal conductivity and low thermal expansion, allowing for better heat transfer and uniform temperature distribution. Additionally, their superior resistance to thermal shocks and chemical attacks prolongs the lifespan of the furnaces, reducing maintenance and downtime.
- 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 applications of monolithic refractories in blast furnaces?
- Monolithic refractories are commonly used in blast furnaces for various applications, including lining the hearth, taphole, and slag line, as well as repairing cracks and erosion in the furnace lining. They are also used to create a protective barrier against high temperatures, chemical reactions, and mechanical stresses inside the blast furnace.
- 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.
- Q: How do monolithic refractories improve the durability of furnace linings?
- Monolithic refractories play a crucial role in enhancing the durability of furnace linings due to their unique characteristics and properties. These materials are composed of a single, homogeneous structure, unlike traditional brick refractories that consist of individual bricks or tiles. One of the key ways in which monolithic refractories improve the durability of furnace linings is through their ability to eliminate joints and seams. In traditional brick refractories, the joints between the bricks can be weak points where cracks and failures can occur due to thermal expansion and contraction. Monolithic refractories, on the other hand, are poured or gunned into place, ensuring a seamless lining. This seamless structure minimizes the potential for cracks, making the lining more durable and less susceptible to thermal stress. Monolithic refractories also have excellent thermal shock resistance, which is crucial for furnace linings that are subjected to rapid and extreme temperature changes. The monolithic structure allows for better heat transfer and distribution, preventing localized hotspots that can lead to thermal shock and lining failure. This enhanced thermal shock resistance ensures that the furnace lining can withstand the repeated heating and cooling cycles without significant damage, hence improving its overall durability. Additionally, monolithic refractories offer superior erosion and corrosion resistance. Furnace linings are often exposed to harsh chemicals, molten metals, and abrasive materials, which can cause erosion and corrosion over time. Monolithic refractories are 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. Furthermore, monolithic refractories provide 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. In summary, monolithic refractories improve the durability of furnace linings by eliminating joints and seams, enhancing thermal shock resistance, providing erosion and corrosion resistance, and offering superior insulation properties. These materials are specifically designed to withstand the extreme conditions inside furnaces, ensuring a longer lifespan for the lining and reducing maintenance costs in the long run.
Send your message to us
Refractory Brick purging plug for BOF and EAF
- Ref Price:
-
- Loading Port:
- Shanghai
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 10 set
- Supply Capability:
- 50000 set/month
OKorder Service Pledge
Quality Product, Order Online Tracking, Timely Delivery
OKorder Financial Service
Credit Rating, Credit Services, Credit Purchasing
Similar products
Hot products
Hot Searches
Related keywords
