Monolithic Refractories for Iron and Steel Industry:Gunning Mass Refractory Material
- Ref Price:
-
- Loading Port:
- Shanghai
- Payment Terms:
- TT or LC
- Min Order Qty:
- 20000 kg
- Supply Capability:
- 100000000 kg/month
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General Information of Gunning Mass
Gunning mass refractories is product that is used in various part of furnace as Monolithic Refractories that added hydraulic alumina cement to refractory aggregate.
Our Company is producing suitable product to installation and working condition through a quality control, this product which is minimizing alumina cement for using various dispersants and ultra fine powder so it has excellent abrasion resistance, erosion resistance, spalling resistance and chemical resistance . It widely used in part of various industrial furnace including incinerator, nonferrous metal furnace etc.
Features of Gunning Mass
High refractoriness, High refractoriness under load
High density, low porosity
Good slag resistance and corrosion resistance
High strength and wear resistance
Good resistance to flake performance
Good thermal shock stability
Scouring resistance
Good hot strength
Technical Data Sheet of Gunning Mass
CA-190 | CA-185 | CA-180 | CA-175 | CA-170 | CA-165 | CA-160 | CA-155 | CA-150 | CA-140 | |||
Properties | ||||||||||||
Application Limit Temp | 1,800 | 1,800 | 1,750 | 1,700 | 1,700 | 1,650 | 1,600 | 1,550 | 1,500 | 1,400 | ||
Bulk Density (g/cm3) | 2.9 | 2.85 | 2.8 | 2.6 | 2.5 | 2.3 | 2.15 | 2.1 | 2.1 | 2 | ||
Water Required for Casting(%) | 9-10 | 9-10 | 11-12 | 11-12 | 10-13 | 11-14 | 12-15 | 13-16 | 13-16 | 13-17 | ||
CCS/MOR | 110ºCx24h | 55(9) | 30(6) | 30(6) | 30(6) | 25(5) | 25(5) | 20(4) | 20(4.5) | 25(5) | 20(5) | |
1,200ºCx3h | 50(8) | 35(7) | 35(7) | 30(7) | 20(4) | 17(3.5) | 15(3.5) | 15(2.5) | 17(4) | 14(3) | ||
1,400ºCx3h | 60(10) | 50(8) | 60(10) | 60(10) | 50(12) | 45(8) | 40(7) | 40(7) | 32(7.5) | - | ||
Permanent Linear Change(%) | 110ºCx24h | -0.03 | -0.03 | -0.06 | -0.06 | -0.06 | -0.06 | -0.06 | -0.06 | -0.06 | -0.06 | |
1,200ºCx3h | -0.1 | -0.1 | -0.15 | -0.15 | -0.2 | -0.2 | -0.16 | -0.3 | -0.25 | -0.3 | ||
1,400ºCx3h | -0.2 | -0.2 | -1 | -1 | -0.8 | -1 | -1 | -0.7 | - | - | ||
Thermal conductivity(W/m.k) | 400ºC | 0.95 | 0.95 | 0.92 | 0.92 | 0.8 | 0.72 | 0.68 | 0.68 | 0.65 | 0.6 | |
1,000ºC | 1.1 | 1.05 | 1.02 | 1.02 | 0.9 | 0.85 | 0.88 | 0.8 | 0.76 | 0.71 | ||
Chemical Analysis(%) | Al2O3 | 92 | 88 | 82 | 75 | 62 | 55 | 50 | 47 | 44 | 35 | |
SiO2 | - | - | 10 | 10 | 29 | 40 | 43 | 45 | 50 | 55 | ||
Photo of Gunning Mass
- Q: How do monolithic refractories protect lining in ladles and tundishes?
- The unique properties and characteristics of monolithic refractories are crucial for protecting the lining in ladles and tundishes. Unlike traditional brick or tile linings, which consist of individual units, monolithic refractories are composed of a single, solid piece. One way in which monolithic refractories protect the lining is through their high density and low porosity. This ensures that the refractory material acts as an effective barrier against the penetration of molten metal and slag. By preventing the infiltration of these corrosive substances, the monolithic refractory shields the lining from chemical attack, ensuring its longevity and performance. Moreover, monolithic refractories exhibit excellent thermal shock resistance. The extreme temperature fluctuations experienced by ladles and tundishes during the steelmaking process can cause cracking or spalling. However, monolithic refractories are able to withstand these rapid temperature changes without damage, protecting the lining from thermal harm. Additionally, monolithic refractories offer superior strength and mechanical properties. Ladles and tundishes face various mechanical stresses, such as the weight of the molten metal and the movement of the refractory lining during pouring. The robustness of monolithic refractories allows them to withstand these forces, preventing any structural failure or damage to the lining. Another advantage of monolithic refractories is their ease of installation. Unlike brick or tile linings, which require meticulous jointing and careful placement, monolithic refractories can be applied as a single, cohesive layer. This seamless application ensures a uniform protective barrier, eliminating weak points or gaps that could compromise the lining's integrity. In conclusion, monolithic refractories play a vital role in protecting the lining in ladles and tundishes. Their dense, impermeable nature prevents the penetration of molten metal and slag, while their thermal shock resistance, mechanical strength, and easy installation contribute to the overall durability and longevity of the lining, ensuring its effective performance in the demanding steelmaking environment.
- Q: What are the challenges faced in the application of monolithic refractories?
- There are several challenges faced in the application of monolithic refractories. Firstly, one of the major challenges is the proper installation of monolithic refractories. Unlike traditional brick refractories that can be easily laid and stacked, monolithic refractories require specialized skills and techniques for proper application. The consistency and workability of the refractory material must be carefully controlled, and the installation process often requires the use of specialized equipment such as gunning machines or vibrating tools. Another challenge is the selection of the appropriate monolithic refractory material for a specific application. There are various types of monolithic refractories available, each with its own unique properties and suitability for different environments. Choosing the wrong type of refractory material can result in premature failure and costly repairs. Therefore, it is essential to understand the operating conditions, such as temperature, chemical exposure, and mechanical stress, to select the most suitable monolithic refractory material. Additionally, monolithic refractories are susceptible to thermal shock and erosion due to their composition and application method. They are typically made from fine powders that are mixed with water or other binding agents to form a paste. This paste is then applied and dried to form a solid refractory lining. However, during the heating and cooling cycles, monolithic refractories can experience thermal expansion and contraction, leading to cracking and spalling. Moreover, the chemical reactions occurring in some industrial processes can cause chemical attack and erosion of the refractory lining, reducing its lifespan. Furthermore, maintenance and repair of monolithic refractories can also be challenging. Unlike brick refractories that can be easily replaced, repairing monolithic refractories often requires skilled personnel and specialized techniques. The damaged area needs to be removed, and a new layer of refractory material must be applied, ensuring proper bonding and compatibility with the existing lining. This process can be time-consuming and costly, particularly in high-temperature applications where extended downtime can result in significant production losses. In summary, the challenges faced in the application of monolithic refractories include proper installation techniques, selection of the appropriate material, susceptibility to thermal shock and erosion, and complex maintenance and repair procedures. Overcoming these challenges requires expertise, careful planning, and a thorough understanding of the specific operating conditions and requirements for each application.
- Q: What types of monolithic refractories are commonly used in the iron and steel industry?
- Due to their exceptional resistance to extreme temperatures and mechanical stresses, various types of monolithic refractories are widely used in the iron and steel industry. These refractories play a crucial role in lining furnaces, ladles, and other equipment used in the production of iron and steel. One commonly employed monolithic refractory in this industry is castable refractory. It is a blend of refractory aggregates, binders, and additives that can be poured or cast into different shapes and sizes. Castable refractories are versatile and easy to install, making them suitable for lining large furnaces and ladles. Additionally, they offer excellent resistance to thermal shocks and provide good thermal insulation. Another type of monolithic refractory utilized in the iron and steel industry is plastic refractory. It comprises a high-alumina refractory aggregate mixed with a bonding agent, typically clay. Plastic refractories possess high plasticity and can be easily shaped by hand or with a trowel. They are commonly used for repairing and patching in furnaces and ladles. Ramming refractories are also frequently employed in the iron and steel industry. These refractories consist of granular refractory materials blended with a binder. They are installed by forcefully ramming the mixture into the desired shape using either a pneumatic hammer or manual ramming tools. Ramming refractories offer exceptional resistance to abrasion and erosion, making them suitable for lining the bottoms of furnaces and other areas subjected to intense mechanical wear. Lastly, gunning refractories find wide application in the iron and steel industry. Gunning refractories are composed of fine refractory powders mixed with water or a bonding agent. They are applied using a gunning machine, which propels the refractory material onto the surface that requires lining. Gunning refractories are commonly used for repairing and maintaining the linings of ladles, tundishes, and other equipment. In conclusion, the iron and steel industry heavily relies on a variety of monolithic refractories, including castables, plastics, rammings, and gunnings, to ensure the reliable and efficient operation of their equipment in high-temperature environments. These refractories offer outstanding thermal insulation, resistance to thermal shocks, and mechanical strength, which are essential for the production of iron and steel.
- Q: How are monolithic refractories used in the iron and steel industry?
- Due to their exceptional performance and versatility, monolithic refractories are widely utilized in various applications within the iron and steel industry. Composed of a uniform material, these refractories serve as seamless linings in high-temperature environments. In the iron and steel industry, the significance of monolithic refractories cannot be overstated as they play a crucial role in multiple stages of the manufacturing process. A primary application is seen in the blast furnace, where the inside of the furnace is lined with monolithic refractories. This lining is exposed to exceedingly high temperatures and harsh chemical reactions. By providing excellent thermal insulation and resistance to chemical attack, monolithic refractories ensure the durability and longevity of the blast furnace. Another crucial application is witnessed in the steelmaking process, where monolithic refractories are used to line the ladles and tundish, utilized for transporting and pouring molten steel. These refractories are specially designed to withstand the corrosive nature and high temperatures of the molten steel, thus preventing contamination and guaranteeing the quality of the final product. Furthermore, monolithic refractories find application in various ancillary equipment and structures within the iron and steel industry. They are employed in furnaces, kilns, and other heat treatment systems to provide insulation and maintain high-temperature conditions. Additionally, they are used in the construction of chimneys, exhaust ducts, and other exhaust systems, where they offer thermal insulation and resistance against corrosive gases. Overall, the vital role played by monolithic refractories in the iron and steel industry lies in their ability to provide high-temperature insulation, chemical resistance, and durability. They optimize the production process, enhance energy efficiency, and ensure the quality of the final product. With their exceptional performance and versatility, monolithic refractories have become an indispensable component within the iron and steel manufacturing industry.
- Q: What are the main types of monolithic refractories used in the iron and steel industry?
- In the iron and steel industry, the primary monolithic refractories used consist of castables, ramming materials, gunning materials, and plastic refractories. Castables, a type of refractory material, can be poured or cast into different shapes and sizes. They're composed of refractory aggregates, binders, and additives. Castables are commonly utilized in ladles, tundishes, and blast furnaces due to their exceptional thermal shock resistance and high strength. Ramming materials, also known as ramming mixes, find application in lining furnace bottoms and other high-temperature settings. They typically comprise refractory aggregates and a bonding agent, allowing them to be compacted or rammed into place. Ramming materials exhibit good resistance to thermal cycling and can endure high temperatures. Gunning materials are specifically designed to be sprayed or gunned onto the refractory surface using a high-pressure gunning machine. They serve the purpose of repairing and patching damaged or eroded refractory linings. Gunning materials are typically comprised of refractory aggregates, binders, and additives. They provide excellent adhesion and are commonly employed in kilns, converters, and electric arc furnaces. Plastic refractories, a type of monolithic refractory, can be molded or formed into different shapes. They're composed of refractory aggregates, plasticizers, and binders. Plastic refractories are used to line various equipment and structures in the iron and steel industry, such as boilers, incinerators, and chimneys. They exhibit good resistance to thermal shock and can be easily installed manually or with a trowel. In summary, these various types of monolithic refractories play a vital role in the iron and steel industry by providing high-temperature resistance, thermal insulation, and durability to the equipment and structures utilized in the production process.
- Q: What are the factors affecting the thermal conductivity of monolithic refractories?
- The thermal conductivity of monolithic refractories can be influenced by several factors. Firstly, the chemical composition of the refractory material plays a significant role in determining its thermal conductivity. The types and amounts of raw materials used can result in different thermal conductivities. For example, refractories with a higher content of insulating materials, such as alumina or silica, tend to have lower thermal conductivities. Secondly, the porosity of the refractory material also affects its thermal conductivity. Higher porosity means more air or gas-filled voids within the material, which act as thermal insulators. Therefore, refractories with higher porosity generally have lower thermal conductivities. Thirdly, 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. Moreover, the size of the grains in the refractory material can impact the 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. Additionally, the temperature at which the refractory material operates can 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. Furthermore, 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. The microstructure of the refractory material, including the arrangement and orientation of its grains, can also affect thermal conductivity. A well-aligned microstructure with good interconnectivity between the grains can enhance heat transfer, resulting in higher thermal conductivity. In conclusion, the thermal conductivity of monolithic refractories is influenced by factors such as 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: How do monolithic refractories contribute to the reduction of heat loss in ladles and tundishes?
- Monolithic refractories contribute to the reduction of heat loss in ladles and tundishes by providing a continuous and seamless lining that minimizes thermal bridging and heat transfer. Unlike traditional brick refractories, monolithic refractories eliminate joints and gaps, preventing heat from escaping through these openings. Additionally, their high thermal conductivity and insulation properties ensure efficient heat containment within the ladles and tundishes, reducing energy loss and improving overall thermal performance.
- Q: What are the advantages of using monolithic refractories in electric arc furnaces?
- There are several advantages to using monolithic refractories in electric arc furnaces. Firstly, monolithic refractories offer excellent thermal shock resistance. Electric arc furnaces operate at extremely high temperatures, and the refractory lining is constantly exposed to rapid temperature changes. Monolithic refractories are able to withstand this thermal cycling without cracking or deteriorating, ensuring the longevity and efficiency of the furnace. Secondly, monolithic refractories have superior corrosion resistance. Electric arc furnaces often use aggressive slag compositions, which can corrode and erode traditional brick linings. Monolithic refractories, on the other hand, are specifically designed to resist chemical attack, providing long-lasting protection against the corrosive effects of molten metal and slag. Additionally, monolithic refractories offer great flexibility in terms of installation. Unlike brick linings, which require extensive labor and time to construct, monolithic refractories can be easily applied as a liquid or paste, allowing for faster and more efficient installation. This not only reduces downtime during furnace maintenance or repairs but also provides the opportunity for customized linings to be easily created to suit specific furnace designs. Moreover, monolithic refractories have excellent thermal conductivity. This property allows for efficient heat transfer within the electric arc furnace, ensuring optimal energy use and minimizing heat losses. This improved thermal efficiency results in reduced operating costs and increased productivity. Furthermore, monolithic refractories have a high refractoriness, meaning they can withstand extremely high temperatures without deformation or failure. This is crucial for electric arc furnaces, which operate at temperatures exceeding 3000°C. The ability of monolithic refractories to maintain their structural integrity at such extreme temperatures ensures the safe and efficient operation of the furnace. In conclusion, the advantages of using monolithic refractories in electric arc furnaces include their thermal shock resistance, corrosion resistance, ease of installation, high thermal conductivity, and exceptional refractoriness. These properties contribute to improved furnace performance, increased productivity, reduced operating costs, and extended furnace life.
- Q: How do monolithic refractories withstand the mechanical impacts in ladle lip applications?
- The unique properties and composition of monolithic refractories enable them to endure mechanical impacts in ladle lip applications. Firstly, their structural integrity is reinforced by being made from a single, uniform material, making them less prone to cracking or breaking when subjected to mechanical forces. Additionally, the inclusion of additives such as fibers or aggregates enhances their resistance to mechanical stresses by distributing the applied forces and reducing stress concentration points. Furthermore, the seamless application process ensures a uniform distribution of impacts and eliminates weak points or joints that could be susceptible to mechanical damage. Moreover, monolithic refractories can be customized with specific compositions and formulations to withstand mechanical impacts, utilizing various binders and additives to enhance toughness, impact resistance, and overall mechanical strength. Finally, the selection of monolithic refractories for ladle lip applications takes into account operating conditions like temperature and chemical exposure to optimize their mechanical properties for the specific challenges posed by ladle lip applications. In conclusion, the homogenous structure, additive inclusion, seamless application process, and customizable composition of monolithic refractories contribute to their ability to withstand mechanical impacts in ladle lip applications, ensuring their durability and effectiveness.
- 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.
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Monolithic Refractories for Iron and Steel Industry:Gunning Mass Refractory Material
- Ref Price:
-
- Loading Port:
- Shanghai
- Payment Terms:
- TT or LC
- Min Order Qty:
- 20000 kg
- Supply Capability:
- 100000000 kg/month
OKorder Service Pledge
Quality Product, Order Online Tracking, Timely Delivery
OKorder Financial Service
Credit Rating, Credit Services, Credit Purchasing
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