• Monoblock Stopper for continuous casting System 1
  • Monoblock Stopper for continuous casting System 2
Monoblock Stopper for continuous casting

Monoblock Stopper for continuous casting

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Loading Port:
Shanghai
Payment Terms:
TT OR LC
Min Order Qty:
10 set
Supply Capability:
50000 set/month

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Description:

 

 

1.excellent thermal shock resistance; 
2.excellent mechanical properties and resistance to vibration 
3. long service life

Monoblock stopper is one of the important steel flow regulation components, and to meet the particularly demanding operating conditions, we manufacture varieties of stoppers with customised specifications to suit the different designs of our customers' tundishes

To facilitate customisation, during our manufacturing process, we apply different mixtures of aluminia or magnesia to the nose of our stoppers for our customers, enabling them to cast various types of steel.

 

The characteristics of the stopper are as follows:

 

PARMETER

Major portion

Stopper head

Stopper head

Stopper head

F.C+SiC (%)

20

10

20

12

Al2O3 (%)

68

80

ZrO2 (%)

72

MgO (%)

75

apparent porosity(%)

15

14

16

15

bulk density(g/cm3)

2.35

2.80

3.30

2.70

CCS  (Mpa)

27

26

27

25

MOR  (Mpa)

8.0

8.0

9.0

8.0

The stopper head is the key part. Standard materials are:

Alumina carbon     suitable for ordinary steel flow control

Zirconium carbon   suitable for special alloy steel flow control

Magnesia carbon    suitable for Ca-treatment steel flow control

Q:What are the key characteristics of monolithic refractories for electric arc furnace applications?
The key characteristics of monolithic refractories for electric arc furnace applications include excellent thermal shock resistance, high erosion and corrosion resistance, good mechanical strength, and the ability to withstand high temperatures and aggressive chemical environments. Monolithic refractories also offer easy installation and maintenance due to their shape versatility and ability to be cast or gunned into place, ensuring optimal performance and longevity in electric arc furnace operations.
Q:What is the role of monolithic refractories in blast furnaces?
Monolithic refractories play a crucial role in blast furnaces as they provide high temperature resistance, erosion and corrosion resistance, thermal insulation, and structural integrity. These refractories are used to line the inside of the blast furnace, forming a protective barrier against the extreme heat and chemical reactions occurring within. They help to maintain the integrity of the furnace and ensure its efficient operation by withstanding the aggressive conditions of the molten iron and slag. Additionally, monolithic refractories allow for easier installation and repair compared to traditional brick refractories, making them a preferred choice in blast furnace applications.
Q:How long is the lifespan of monolithic refractories in iron and steel applications?
The lifespan of monolithic refractories in iron and steel applications can vary depending on several factors such as the specific type of refractory material used, the operating conditions, and the maintenance practices. However, on average, monolithic refractories in iron and steel applications can last anywhere from a few months to several years.
Q:How do monolithic refractories resist corrosion and erosion in iron and steel applications?
Monolithic refractories, unlike traditional refractory bricks, consist of a single, homogeneous material and are highly resilient and effective in combating corrosion and erosion in iron and steel applications. Their monolithic nature provides several advantages when it comes to corrosion and erosion resistance. One key advantage is their low porosity, which prevents corrosive agents like molten metal or slag from infiltrating the refractory structure. By minimizing interconnected pores, monolithic refractories significantly reduce the likelihood of chemical reactions that cause corrosion. Moreover, monolithic refractories exhibit excellent resistance to thermal shock, a common issue in iron and steel applications due to rapid temperature changes. Their high thermal conductivity and low thermal expansion enable them to withstand thermal shock without compromising their integrity. This characteristic allows them to resist erosion caused by the flow of molten metal or slag. Additionally, monolithic refractories are highly durable and possess good mechanical strength, enabling them to withstand the abrasive forces often encountered in iron and steel applications. The intense mechanical impact, vibrations, and abrasive wear experienced in these environments can be effectively resisted by monolithic refractories, ensuring their longevity and reliability. In conclusion, monolithic refractories are the preferred choice for lining furnaces, ladles, and other equipment used in the production of iron and steel due to their resistance to corrosion and erosion. Their low porosity, excellent resistance to thermal shock, and high mechanical strength make them an ideal option for these demanding applications.
Q:How are monolithic refractories installed and repaired in iron and steel plants?
Monolithic refractories in iron and steel plants are typically installed through a process called gunning, where a specialized gunning machine is used to spray the refractory material onto the desired surface. The refractory material is mixed with water or a bonding agent to form a dense and durable lining. In terms of repairs, damaged or worn-out monolithic refractories are typically removed by mechanical means, such as jackhammers or pneumatic tools. The damaged area is then cleaned and prepared before new refractory material is applied using the gunning method. In some cases, patching materials may be used to repair smaller areas of damage. Overall, the installation and repair of monolithic refractories in iron and steel plants require skilled technicians and specialized equipment to ensure the optimum performance and longevity of the refractory lining.
Q:What are the common failure mechanisms of monolithic refractories?
Common failure mechanisms of monolithic refractories include thermal spalling, chemical attack, erosion, and mechanical stress. Thermal spalling occurs when the refractory material is exposed to rapid temperature changes, leading to the cracking and breaking of the refractory lining. This can happen due to thermal shock, such as when a cold material is suddenly exposed to high temperatures, or when the refractory is subjected to cyclic heating and cooling. Chemical attack occurs when the refractory material comes into contact with aggressive chemicals or gases that can react with and degrade the refractory lining. This can lead to the formation of new compounds or the dissolution of the refractory material, weakening its structure and reducing its resistance to further chemical attack. Erosion is another common failure mechanism, especially in applications where the refractory lining is exposed to high-velocity gas or liquid flows. The abrasive action of the flowing medium can gradually wear away the refractory material, leading to thinning and eventual failure of the lining. Mechanical stress, such as thermal expansion or contraction mismatch, can also cause failure in monolithic refractories. When the refractory material is subjected to rapid temperature changes, differential expansion or contraction can occur, leading to the development of cracks and fractures in the lining. To mitigate these failure mechanisms, various techniques can be employed, such as proper material selection based on the specific operating conditions, careful design to minimize thermal gradients, use of protective coatings, and regular inspection and maintenance to identify and address any signs of failure or degradation.
Q:How do monolithic refractories contribute to the overall safety of iron and steel operations?
The overall safety of iron and steel operations is greatly ensured by the crucial role played by monolithic refractories, which provide various important benefits. Firstly, these refractories are renowned for their exceptional thermal insulation properties, enabling them to effectively withstand extreme temperatures and prevent heat loss. This is particularly crucial in iron and steel operations where high temperatures are involved in processes like melting, casting, and heat treatment. By minimizing heat loss, monolithic refractories help maintain a stable temperature environment, thereby reducing accident risks and ensuring personnel safety. Secondly, monolithic refractories offer outstanding resistance to chemical attacks. In iron and steel operations, the presence of different chemicals and gases can corrode and deteriorate the linings of furnaces, ladles, and other equipment. By serving as a protective barrier, monolithic refractories prevent the penetration of these corrosive substances, prolonging the equipment's lifespan and minimizing the chances of failures or leaks that could pose safety hazards. Moreover, monolithic refractories are known for their structural integrity and high mechanical strength. In iron and steel operations, heavy loads and stresses are common, especially during the handling and movement of molten metal and raw materials. Monolithic refractories can withstand these stresses without cracking or collapsing, ensuring the equipment's structural stability and minimizing accidents or equipment failures. Additionally, monolithic refractories exhibit excellent thermal shock resistance. In iron and steel operations, sudden temperature changes can occur due to the introduction of cold materials or liquids into hot equipment. This thermal shock can cause cracking and spalling of the refractory lining, compromising the operation's safety and efficiency. With their ability to withstand thermal shock, monolithic refractories help minimize the risk of unexpected failures and maintain the operation's overall safety. In conclusion, monolithic refractories significantly contribute to the overall safety of iron and steel operations through their high thermal insulation, chemical resistance, structural integrity, and thermal shock resistance. By ensuring a stable temperature environment, protecting against chemical attacks, withstanding heavy loads, and resisting thermal shock, monolithic refractories help prevent accidents, equipment failures, and potential hazards, creating a safer working environment for personnel in the iron and steel industry.
Q:How do monolithic refractories enhance the efficiency of reheating furnaces?
Monolithic refractories enhance the efficiency of reheating furnaces by providing better thermal insulation, reducing heat loss, and improving the overall heat transfer within the furnace. These refractories have excellent resistance to high temperatures and thermal shock, allowing them to withstand extreme conditions for prolonged periods. By minimizing heat loss and maintaining a consistent temperature, they ensure that the reheating process is more energy-efficient, resulting in reduced fuel consumption and increased productivity.
Q:How are monolithic refractories different from traditional refractory materials?
Monolithic refractories are different from traditional refractory materials in several ways. Firstly, while traditional refractory materials are typically made from bricks, blocks, or tiles, monolithic refractories are composed of a single, continuous material. This means that they do not have any joints or seams, which can be a weak point in traditional refractory structures. Secondly, monolithic refractories are much easier to install compared to traditional refractory materials. They can be easily shaped and applied in situ, allowing for greater flexibility in design and construction. In contrast, traditional refractory materials require skilled labor and more time-consuming installation methods such as bricklaying. Furthermore, monolithic refractories offer improved thermal shock resistance. Due to their continuous structure, they can better withstand sudden changes in temperature without cracking or spalling. Traditional refractory materials, on the other hand, may be more susceptible to thermal shock damage. Another advantage of monolithic refractories is their ability to provide better insulation. Their composition often includes lightweight aggregates or insulating fibers, which help to reduce heat loss and improve energy efficiency. Traditional refractory materials, while still capable of providing insulation, may not offer the same level of thermal efficiency. Lastly, monolithic refractories have the advantage of being more cost-effective. Their ease of installation, reduced labor requirements, and improved thermal performance contribute to lower overall project costs compared to traditional refractory materials. In summary, monolithic refractories differ from traditional refractory materials in terms of their continuous structure, ease of installation, improved thermal shock resistance, better insulation properties, and cost-effectiveness. These characteristics make them a preferred choice in many industries where high-temperature applications and thermal insulation are required.
Q:How do monolithic refractories resist high temperatures?
Monolithic refractories, with their unique composition and structure, are specifically designed to withstand high temperatures. Unlike traditional refractory bricks, which are made up of multiple pieces, these refractories are created from a single material or piece. The primary factor contributing to the high temperature resistance of monolithic refractories is their elevated melting point. Materials such as alumina, silica, and magnesia, which have melting points ranging from 1650°C to 2000°C, are utilized in their production. This characteristic allows the refractories to endure extreme temperatures without experiencing significant deformation or melting. Moreover, monolithic refractories possess exceptional thermal stability. They exhibit low thermal conductivity, enabling them to effectively insulate against heat transfer. As a result, these refractories can maintain their structural integrity even when exposed to rapid temperature changes or thermal shocks. Furthermore, the monolithic nature of these refractories grants them enhanced resistance to thermal stress. Unlike traditional refractory bricks, they lack joints or seams that are susceptible to thermal expansion and contraction. Consequently, they exhibit greater resistance to cracking or spalling when subjected to high temperatures. Additionally, monolithic refractories have the ability to develop a protective layer or slag on their surface when exposed to elevated temperatures. This slag acts as a barrier, preventing direct contact between the refractory material and the hot gases or molten metals. Consequently, the risk of chemical reactions or corrosion is reduced. In conclusion, the combination of high melting point, thermal stability, resistance to thermal stress, and the capacity to form a protective slag makes monolithic refractories highly effective in withstanding high temperatures. They find wide applications in various industries, including steel, cement, glass, and petrochemical, where they encounter extreme heat conditions.

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