Refractory Tundish upper nozzle and collect nozzle
- Ref Price:
-
- Loading Port:
- Shanghai
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 10 set
- Supply Capability:
- 50000 set/month
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Description:
Steelmaking tundish upper nozzle is an kind of quickchange nozzle,used together with tundish collect nozzle which produced by topcahse, with high purity zr 95% for steel continuous casting process
tundish nozzle is one kind of refractory alumina-zirconia-cartbon brick which are used for control the molten
steel in steel casting .we called is composite zirconia tundish nozzle
| Al2O3 % | Fe2O3 % | SiO2 % | TiO2 % | ZrO2 % | CaO % | MgO % | LOI % | Density g/cm³ | Proosity | fraclure strength Mpa | Application | |
| Body | 53.28 | 0.91 | 14.48 | 1.41 | 30.59 | 2.42 | 14.3 | 8.4 | general | |||
| Bowl struclure | 86.61 | 0.43 | 0.77 | 0.33 | 11.11 | 2.85 | 17.7 | 6.73 | general | |||
| Bowl struclure | 71.43 | 0.91 | 10.65 | 10.95 | 2.78 | 16.3 | 14.5 | Bowl struclure with serious corrosion | ||||
| Body | 63.15 | 1.51 | 6.83 | 0.87 | 3.25 | 22.13 | 2.6 | 16.24 | 8.67 | Inner part with serious corrosion | ||
| Liner | 64.1 | 0.81 | 4.06 | 4.94 | 0.12 | 0.32 | 22.5 | 2.4 | 16.7 | 7.2 | General anti-blocking | |
| Liner | 0.55 | 4.65 | 52 | 19.2 | 0.3 | 22.3 | 2.45 | 16.3 | 8.6 | High standard anti-blocking | ||
| Liner | 52.9 | 13.9 | 0.07 | 21 | 12.1 | 2.51 | 18.71 | 6 | Low carbon | |||
| Bowl struclure | 15.1 | 8.95 | 0.29 | 1.56 | 56.8 | 17.3 | 2.59 | 16.7 | 7.8 | Slag Containing |
Manufacturing and QC
1.Raw materials blending
Independent raw materials blending center to assurestrict control of materials quality.
2.Shaping
Isostatic pressing technoloty,with as 1000 tons of pressure to assure the homogenous bulk density of each product.
3.Machining
To assure the uniform shape,dimension and dimension tolerance of each product.
4.X-ray defect inspection
To assure all products supplied to our customers without any defect and to prevent the un-countable feconomic loss for our customers.
5.Physical and chemistry analysis
To assure all products meet the physical and chemistry characteristics.
6.Packaging
The world-class for packaging to assure the safety transportation.
- Q:How are monolithic refractories applied in the hot face and cold face of furnace linings?
- Monolithic refractories are applied in the hot face and cold face of furnace linings through different methods. For the hot face, monolithic refractories are typically sprayed or troweled onto the surface, forming a dense and heat-resistant layer. This layer protects the furnace from high temperatures and thermal shocks. In contrast, for the cold face, monolithic refractories are usually cast or gunned into place, creating a more insulating layer. This layer helps to maintain a lower temperature on the outer surface of the furnace lining. Overall, the application of monolithic refractories in both the hot face and cold face ensures optimal performance and durability of furnace linings.
- Q:How do monolithic refractories contribute to the reduction of heat loss in iron and steel furnaces?
- Reducing heat loss in iron and steel furnaces is a crucial role played by monolithic refractories. These refractories are specifically designed to create a seamless lining throughout the furnace, eliminating any joints or seams that could result in thermal leaks. Monolithic refractories effectively contribute to heat loss reduction in two ways. Firstly, they possess excellent thermal insulation properties that restrict the transfer of heat from the furnace to its surroundings. With their low thermal conductivity, they effectively maintain the high temperatures required for efficient iron and steel production within the furnace, while minimizing heat loss to the surrounding environment. Secondly, monolithic refractories act as a protective barrier, preventing the escape of hot gases and molten metal. This barrier ensures the integrity of the furnace lining, preventing any gaps or cracks that could allow heat to escape. By creating a tight and continuous lining, monolithic refractories significantly reduce heat loss by keeping the heat contained within the furnace. Furthermore, monolithic refractories exhibit a high resistance to thermal shock and erosion, which are common challenges faced in iron and steel furnaces. These refractories can withstand rapid temperature changes, preventing sudden cracks or failures that could result in heat loss. Additionally, they are resistant to the corrosive effects of molten metal and hot gases, guaranteeing the longevity of the lining and preserving its insulating properties over time. To summarize, monolithic refractories contribute to the reduction of heat loss in iron and steel furnaces through their exceptional thermal insulation properties, ability to provide a continuous lining, resistance to thermal shock and erosion, and protection against corrosive substances. By minimizing heat loss, these refractories optimize energy efficiency and productivity in the furnace, leading to cost savings and improved overall performance in the iron and steel industry.
- Q:How are monolithic refractories used in the repair and maintenance of ladle and tundish covers?
- Monolithic refractories are used in the repair and maintenance of ladle and tundish covers by providing a durable and heat-resistant lining. These refractories are applied as a single, seamless layer, eliminating the need for multiple bricks or tiles. They can be easily shaped and molded to fit the specific contour of the ladle or tundish cover, ensuring a tight and secure seal. Monolithic refractories also offer excellent thermal insulation properties, preventing heat loss and reducing energy consumption. Additionally, they have high resistance to thermal shock and chemical corrosion, extending the lifespan of the ladle and tundish covers and minimizing the need for frequent repairs.
- Q:What are the common applications of monolithic refractories in blast furnaces?
- Monolithic refractories, also known as unshaped refractories, are widely used in blast furnaces due to their advantageous properties and versatile applications. Some common applications of monolithic refractories in blast furnaces include: 1. Furnace lining: Monolithic refractories are used to line the walls, hearth, and roof of blast furnaces. Their high thermal resistance and superior insulating properties help protect the furnace structure from extreme temperatures and thermal shocks. 2. Tuyere and taphole repair: Blast furnaces have tuyeres, which are nozzles that inject air or fuel into the furnace, and tapholes, which are openings used to tap molten iron or slag. Monolithic refractories are used to repair and maintain these critical components, as they can withstand the high temperatures and chemical reactions occurring in these areas. 3. Hot repair and maintenance: Blast furnaces undergo frequent repairs and maintenance due to the harsh operating conditions. Monolithic refractories are used for hot repair and maintenance, as they can be easily applied in a plastic or semi-plastic state to fill cracks, patch damaged areas, or replace worn-out linings. 4. Erosion and corrosion resistance: Blast furnace environments are highly corrosive due to the presence of molten iron, slag, and other molten materials. Monolithic refractories with high resistance to erosion and corrosion are used to protect the furnace lining from chemical attacks and prolong its lifespan. 5. Gunning mixes: Gunning mixes are widely used in blast furnaces for their ability to be sprayed or gunned onto the refractory lining. These mixes consist of fine refractory aggregates, bonding agents, and additives. They are applied to repair worn-out areas, seal cracks, and provide a protective layer against erosion and slag penetration. 6. Slag line and iron runner repair: The slag line and iron runners in blast furnaces are prone to erosion and wear due to the corrosive nature of molten slag and iron. Monolithic refractories are used to repair and rebuild these areas, ensuring smooth and efficient operation of the furnace. In conclusion, monolithic refractories have various applications in blast furnaces, including furnace lining, tuyere and taphole repair, hot repair and maintenance, erosion and corrosion resistance, gunning mixes, and slag line and iron runner repair. Their ability to withstand high temperatures, chemical attacks, and mechanical stresses make them indispensable in maintaining the integrity and efficiency of blast furnace operations.
- Q:What are the typical applications of monolithic refractories in blast furnaces?
- Monolithic refractories are widely used in blast furnaces due to their unique properties and applications. These refractories are composed of a single, homogeneous material that can be shaped and installed in various forms without the need for joints or seams. This characteristic makes them ideal for lining and protecting the different zones of a blast furnace. One typical application of monolithic refractories in blast furnaces is the lining of the hearth. The hearth is the bottom part of the furnace where molten iron and slag accumulate. Monolithic refractories are used to create a durable and heat-resistant lining that can withstand the extreme temperatures and chemical reactions occurring in this area. Another common application is the lining of the bosh, which is the transition zone between the hearth and the stack of the blast furnace. The bosh is subjected to high temperatures and mechanical stresses due to the movement of the burden materials. Monolithic refractories with high thermal shock resistance and abrasion resistance are used to ensure the longevity and efficiency of the bosh. Monolithic refractories are also used for the lining of the stack and the tuyere area. The stack is the vertical part of the furnace where the reduction of iron ore takes place. The tuyere area is where the hot blast of air is injected into the furnace. Both of these areas require refractories that can withstand high temperatures, chemical reactions, and mechanical stresses. Furthermore, monolithic refractories are used for repairs and maintenance in blast furnaces. Due to the harsh conditions inside the furnace, the lining may deteriorate over time. Monolithic refractories can be easily applied as patching materials to restore the integrity of the lining and extend the furnace's lifespan. In summary, the typical applications of monolithic refractories in blast furnaces include lining the hearth, bosh, stack, and tuyere area, as well as for repairs and maintenance. These refractories provide excellent thermal shock resistance, abrasion resistance, and durability, making them essential for the efficient operation of blast furnaces in the iron and steel industry.
- Q:What are the main causes of monolithic refractory failure in the iron and steel industry?
- Monolithic refractory failure in the iron and steel industry can be attributed to various causes. Thermal cycling stands out as one of the primary factors. The extreme temperatures encountered during iron and steel manufacturing, including melting, casting, and heat treating, expose the refractory lining to significant thermal stress. This repetitive expansion and contraction of the material can lead to cracking, spalling, or even complete disintegration of the refractory. Chemical attack is another common cause of failure. The iron and steel industry utilizes different chemicals, such as molten metal, slag, and gases, which can react with the refractory lining. This chemical interaction can result in erosion, corrosion, or chemical decomposition of the refractory material, ultimately causing failure over time. Mechanical stress also plays a significant role in monolithic refractory failure. The heavy machinery and equipment employed in iron and steel production produce vibrations, shocks, and impacts that can weaken or damage the refractory lining. Additionally, improper installation or design can create stress concentration points, making the refractory more susceptible to failure. Furthermore, refractory failure can be attributed to improper maintenance and operational practices. Inadequate cooling or heating procedures, improper drying and curing of the refractory, and insufficient cleaning and inspection can all affect the longevity and performance of the material. Neglecting regular maintenance and timely repairs can exacerbate minor issues, eventually leading to more significant failures. Lastly, the choice and quality of refractory material are crucial factors in failure. Opting for an unsuitable refractory for a specific application or using low-quality materials can result in premature failure. Considering factors such as temperature range, chemical exposure, and mechanical stress is essential when selecting the refractory lining to ensure its suitability and durability in the iron and steel industry. To summarize, the main causes of monolithic refractory failure in the iron and steel industry include thermal cycling, chemical attack, mechanical stress, improper maintenance and operational practices, and the choice and quality of refractory material. Addressing these factors through proper installation, regular maintenance, and careful material selection can help mitigate refractory failures and enhance the overall efficiency and productivity of iron and steel production processes.
- Q:How do monolithic refractories prevent thermal radiation in the iron and steel industry?
- Monolithic refractories prevent thermal radiation in the iron and steel industry by providing a high level of insulation. They are specifically designed to withstand high temperatures and reduce heat transfer through radiation. By forming a protective barrier around the furnaces and other equipment, monolithic refractories minimize the loss of heat through thermal radiation, thereby improving energy efficiency and reducing energy consumption in the iron and steel production process.
- Q:What are the factors affecting the lifespan of monolithic refractories?
- There are several factors that can significantly affect the lifespan of monolithic refractories. 1. Temperature: One of the most critical factors is the operating temperature. Monolithic refractories are designed to withstand high temperatures, but prolonged exposure to extreme temperatures can cause thermal shock and lead to premature failure. 2. Thermal cycling: Frequent temperature fluctuations, known as thermal cycling, can also shorten the lifespan of monolithic refractories. The expansion and contraction of the refractory material can create stress, resulting in cracking and degradation over time. 3. Chemical environment: The chemical environment in which the monolithic refractories are used plays a crucial role in their lifespan. Exposure to corrosive gases, acids, alkalis, or molten metals can cause chemical reactions that degrade the refractory material. 4. Mechanical stress: Mechanical stress, such as abrasion, impact, and vibration, can weaken monolithic refractories and shorten their lifespan. This is especially relevant in industries with high mechanical activity, such as steelmaking or cement production. 5. Installation and maintenance: Proper installation and regular maintenance are essential for maximizing the lifespan of monolithic refractories. Poor installation techniques or neglecting maintenance can result in weak joints, inadequate anchoring, or the growth of cracks, leading to premature failure. 6. Quality of refractory material: The quality and composition of the monolithic refractory material can significantly impact its lifespan. Higher-quality materials with better resistance to temperature, chemical attacks, and mechanical stress tend to have longer lifespans. 7. Design and engineering: The design of the refractory lining and its engineering considerations, such as thickness, shape, and reinforcement, also influence the lifespan of monolithic refractories. Proper design can distribute stress more evenly, reduce thermal gradients, and improve overall performance and durability. 8. Operating conditions: The way monolithic refractories are operated and handled can affect their lifespan. Factors such as rapid temperature changes, improper cooling or heating procedures, or excessive thermal cycling can all contribute to premature failure. In summary, the lifespan of monolithic refractories is influenced by various factors, including temperature, thermal cycling, chemical environment, mechanical stress, installation and maintenance practices, quality of refractory material, design and engineering considerations, and operating conditions. Proper consideration and management of these factors are essential for maximizing the lifespan of monolithic refractories.
- Q:What are some common maintenance practices for monolithic refractories in iron and steel furnaces?
- Some common maintenance practices for monolithic refractories in iron and steel furnaces include: 1. Regular inspections: Conducting routine inspections is essential to identify any potential issues with the monolithic refractories. Inspections should be carried out by trained professionals who can assess the condition of the refractories and detect any signs of wear, erosion, or damage. 2. Repair and patching: Promptly repairing any damaged or eroded areas is crucial to prevent further deterioration and maintain the integrity of the refractories. Patching materials, such as refractory mortars or castable refractories, can be used to fill in gaps or repair small cracks. 3. Cleaning: Regularly cleaning the refractory lining helps to remove any build-up of slag, scale, or other impurities that can negatively impact the performance of the refractories. Cleaning can be done mechanically, using brushes or scrapers, or through chemical methods such as acid cleaning. 4. Thermal cycling: Controlled thermal cycling is often performed to condition and strengthen the monolithic refractories. This involves gradually increasing and decreasing the temperature of the furnace to improve the refractory's resistance to thermal shock. 5. Coating and sealing: Applying protective coatings or sealants to the refractory lining can help enhance its resistance to chemical attack, erosion, and thermal cycling. These coatings act as a barrier, preventing the penetration of molten metals or slags into the refractory material. 6. Monitoring and control: Continuous monitoring of operating conditions such as temperature, pressure, and atmosphere inside the furnace is important to prevent any sudden changes that may negatively affect the refractories. Maintaining proper control over these parameters helps to extend the life of the monolithic refractories. 7. Training and education: Providing regular training and education to furnace operators and maintenance personnel is crucial for them to understand the importance of proper refractory maintenance practices. This ensures that the refractories are handled and operated correctly, reducing the risk of premature failure. Overall, implementing these maintenance practices can significantly prolong the lifespan of monolithic refractories in iron and steel furnaces and maximize their performance, ultimately leading to improved efficiency and cost-effectiveness in the production process.
- Q:How do monolithic refractories improve the efficiency of ladle and tundish drying systems?
- Monolithic refractories improve the efficiency of ladle and tundish drying systems by providing superior thermal insulation, reduced heat loss, and increased resistance to thermal shock. These refractories have high thermal conductivity and low heat capacity, enabling faster and more uniform heating of the ladle and tundish. Additionally, their monolithic nature eliminates joints and seams that could lead to heat leakage, ensuring better heat retention and improved energy efficiency. The enhanced thermal properties of monolithic refractories contribute to quicker drying times and reduced energy consumption in ladle and tundish drying processes, ultimately improving overall system efficiency.
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Refractory Tundish upper nozzle and collect nozzle
- 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
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