Installation method of air brick for detecting liquid level of molten steel in continuous casting tundish

Abstract

The invention relates to the field of molten metal liquid level detection in the metallurgical industry, in particular to an air brick mounting method for detecting the liquid level of molten steel in a continuous casting tundish, which comprises the following steps: firstly, before a permanent layer is poured, a brick cup welding bracket for detecting an air permeable permanent brick and an internal air chamber are welded and mounted at a preset position, and the position is preferably a position near a tundish nozzle and close to a tundish arm; secondly, a vent plug tool A is used for sealing a vent chamber, and a high-temperature-resistant metal pipeline is connected to the edge of the top of the tundish; pouring construction of a permanent layer is carried out; after the permanent layer is baked, the vent plug tool A is dismantled and replaced with a vent plug tool B for working layer dry material construction, after construction is completed, a detection vent plug is installed, and gaps are filled with fireclay; and finally, the high-temperature-resistant hard pipe is in butt joint with the hose pipelines of the tundish trolley and the tundish platform through quick connectors. The accuracy and the stability of liquid level detection are improved, the service life of the detection air brick is prolonged, and a powerful guarantee is provided for on-site safety production.

Description

Technical Field

[0001] The invention belongs to the field of molten metal level detection in the metallurgical industry, and relates to a method for installing a gas-permeable brick used for molten steel level detection in a continuous casting tundish. Background Art

[0002] Tundish level detection technology plays an important role in the metallurgical industry, and it is directly related to the safety and efficiency of metallurgical production. However, in China, tundish level detection technology is still a pioneering technology, and the accompanying pneumatic detection air bricks are also installed and applied in the tundish for the first time. Due to the innovativeness of this technology, there are no relevant mature application cases in the metallurgical industry for reference.

[0003] At present, the measurement of molten steel level in metallurgical tundishes faces many challenges. On the one hand, the air curtain retaining wall technology in the tundish is quite different from the detection air brick technology because of its flow characteristics and sealing requirements, so it cannot be directly applied. On the other hand, as a more precise pneumatic detection element, the pneumatic detection air brick has a smaller flow characteristic and has extremely high requirements for air tightness under high temperature conditions. This makes the installation and use of the detection air brick particularly complicated and difficult.

[0004] In addition, the detection air brick needs to be in direct contact with the molten steel in the tundish, and the working conditions are extremely harsh. Therefore, its installation not only needs to be combined with the production scheduling and equipment maintenance requirements of the tundish, but also needs to consider many factors such as refractory construction. However, the existing installation technologies and methods often cannot meet these complex requirements, resulting in various problems in the use of the detection air brick, such as insufficient air permeability stability, poor working air tightness, etc., which affects the safety and efficiency of production.

[0005] In summary, the existing technology has obvious defects and deficiencies in the detection of the tundish liquid level, and a new, more reasonable and effective installation method is urgently needed to overcome these problems. Summary of the invention

[0006] In view of this, the purpose of the present invention is to provide a method for installing air-permeable bricks for detecting the liquid level of molten steel in a continuous casting tundish, so as to solve the existing problems.

[0007] To achieve the above object, the present invention provides the following technical solution: a method for installing a permeable brick for detecting the liquid level of molten steel in a continuous casting tundish, comprising a tundish trolley, a tundish arranged on the tundish trolley, and a tundish water inlet arranged at the bottom of the tundish, comprising the following steps:

[0008] S1, testing the installation technology of breathable permanent bricks: before pouring the permanent layer, weld the support bracket of the seat brick and the internal air chamber to the predetermined position, which is located near the water inlet of the tundish and close to the arm of the tundish;

[0009] S2, air chamber sealing and pipe connection: After the permanent seat bricks are installed, use the air plug tooling A to seal the air chamber, and connect the high-temperature resistant metal pipe arranged close to the cladding to connect the air chamber of the air brick to the edge of the tundish top;

[0010] S3, permanent layer pouring: after the air permeable chamber is sealed and the pipeline is connected, the permanent layer is poured;

[0011] S4, working layer construction and ventilation plug installation: After the permanent layer is baked, the ventilation plug tooling A is removed and replaced with ventilation plug tooling B to carry out working layer dry material construction; after the construction is completed, the ventilation plug tooling B is removed, and the detection ventilation plug is installed using special tool C, and the relevant gaps are filled with fire clay;

[0012] S5, Pipeline docking: Install the high temperature resistant hard pipe on the edge of the tundish arm with a quick connector, and connect it with the corresponding hose pipeline on the tundish trolley and the tundish platform through a quick connector.

[0013] Optionally, the breathable plug tooling A and the breathable plug tooling B are customized tooling used to ensure the sealing of the breathable chamber and the construction convenience of the working layer during the construction of the permanent layer and the working layer respectively.

[0014] Optionally, the special tool C is a specially designed tool used to ensure the accuracy and stability of the installation when installing the detection vent plug.

[0015] Optionally, high temperature resistant metal pipes and quick connectors are made of high temperature resistant and corrosion resistant materials to ensure stability and durability under high temperature and harsh working conditions.

[0016] Optionally, the method further includes configuring a pneumatic instrument control box and an industrial control host computer in the pneumatic detection system for the tundish liquid level, so as to monitor and control the liquid level of the molten steel in the tundish in real time.

[0017] Optionally, the pneumatic instrument control box and the industrial control host computer are connected to the detection air-permeable bricks and the detection pipeline in the tundish through a signal transmission line to achieve real-time transmission and processing of data.

[0018] The beneficial effects of the present invention are:

[0019] 1) The present invention ensures the accuracy and stability of the air-permeable bricks during the installation process by designing a reasonable installation process and construction process; this avoids the problems of insufficient air permeability stability and poor working air tightness caused by improper installation, thereby improving the accuracy and reliability of the tundish liquid level detection;

[0020] 2) The present invention also takes into account the production scheduling, equipment maintenance and refractory construction requirements of the tundish, ensuring that the installation of the air bricks can meet the actual needs of the site; this not only improves the construction efficiency, but also reduces the installation cost, saving valuable time and resources for the enterprise;

[0021] 3) The invention further ensures the safety and reliability of the installation process of the air-permeable bricks by customizing the tooling and tools. This not only reduces the safety risks during the construction process, but also provides a strong guarantee for subsequent production operations.

[0022] In summary, the present invention provides a more reasonable, effective and safe method for installing air-permeable bricks, provides a strong guarantee for the on-site implementation of the pneumatic monitoring technology for the liquid level of the tundish and the on-site safe production, and has significant social and economic benefits.

[0023] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

[0025] Figure 1 It is a front view of the present invention;

[0026] Figure 2 is a side view of the present invention;

[0027] Figure 3 It is a schematic diagram of the special tool C of the present invention.

[0028] Reference numerals: tundish 1, tundish trolley 2, tundish water inlet 3, detection air-permeable brick 4, detection pipeline in tundish 5, pneumatic instrument control box 6, industrial control host computer 7. DETAILED DESCRIPTION

[0029] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0030] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0031] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0032] See also Figure 1 to Figure 3 , is a method for installing a gas-permeable brick for detecting the liquid level of molten steel in a continuous casting tundish, comprising the following steps:

[0033] S1, Testing of breathable permanent brick installation technology:

[0034] The tundish 1 is set on the tundish trolley 2. Before the permanent layer is poured, the seat brick welding bracket and the internal air chamber are welded and installed at the predetermined position. This position (as shown in the attached figure) is located near the tundish water inlet 3 and the tundish arm to ensure that the detection air permeable permanent brick 4 can be installed stably and accurately.

[0035] S2, air chamber seal and pipeline connection:

[0036] After the permanent seat bricks are installed, the air chamber is sealed using the custom tooling - air plug tooling A. Then, the high temperature resistant metal pipe 5 (made of high temperature resistant and corrosion resistant material) arranged close to the cladding is connected to ensure that the air chamber of the air brick can be smoothly connected to the top edge of the tundish 1.

[0037] S3, permanent layer pouring:

[0038] After the air chamber is sealed and the pipeline is connected, the permanent layer is poured to ensure its stability and sealing.

[0039] S4, working layer construction and ventilation plug installation:

[0040] After the permanent layer is baked, remove the breathable plug tooling A and replace it with breathable plug tooling B to carry out dry material construction of the working layer. After the construction is completed, remove the breathable plug tooling B again, use the specially designed special tool C (to ensure the accuracy and stability of the installation) to install the detection breathable plug, and fill the relevant gaps with fire mud to complete the installation of the working layer.

[0041] S5, Pipeline connection:

[0042] Finally, install the high temperature resistant hard pipe (also made of high temperature resistant and corrosion resistant materials) on the edge of the tundish arm with a quick connector, and connect it with the corresponding hose pipeline on the tundish trolley 2 and the middle package platform through a quick connector to ensure the smoothness and stability of the pipeline.

[0043] In addition, this embodiment also includes the following optional steps:

[0044] A pneumatic instrument control box 6 and an industrial control host computer 7 are configured in the tundish liquid level pneumatic detection system to monitor and control the liquid level of the molten steel in the tundish 1 in real time.

[0045] The pneumatic instrument control box 6 and the industrial control host computer 7 are connected with the detection air-permeable bricks 4 and the detection pipeline 5 in the tundish 1 through a signal transmission line to realize real-time transmission and processing of data, thereby ensuring the accuracy and reliability of the monitoring system.

[0046] Through the above embodiments, we have successfully completed the installation of air-permeable bricks for molten steel level detection in the continuous casting tundish, providing a strong guarantee for the on-site implementation of the tundish liquid level pneumatic monitoring technology and on-site safe production.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. A method for installing a permeable brick for detecting the liquid level of molten steel in a continuous casting tundish, comprising a tundish trolley, a tundish arranged on the tundish trolley, and a tundish water inlet arranged at the bottom of the tundish, characterized in that: The following steps are involved: S1, testing the installation technology of breathable permanent bricks: before pouring the permanent layer, weld the support bracket of the seat brick and the internal air chamber to the predetermined position, which is located near the water inlet of the tundish and close to the arm of the tundish; S2, air chamber sealing and pipe connection: After the permanent seat bricks are installed, use the air plug tooling A to seal the air chamber, and connect the high-temperature resistant metal pipe arranged close to the cladding to connect the air chamber of the air brick to the edge of the tundish top; S3, permanent layer pouring: after the air permeable chamber is sealed and the pipeline is connected, the permanent layer is poured; S4, working layer construction and ventilation plug installation: After the permanent layer is baked, the ventilation plug tooling A is removed and replaced with ventilation plug tooling B to carry out working layer dry material construction; after the construction is completed, the ventilation plug tooling B is removed, and the detection ventilation plug is installed using special tool C, and the relevant gaps are filled with fire clay; S5, Pipeline docking: Install the high temperature resistant hard pipe on the edge of the tundish arm with a quick connector, and connect it with the corresponding hose pipeline on the tundish trolley and the tundish platform through a quick connector.

2. The method for installing a gas-permeable brick for detecting the liquid level of molten steel in a continuous casting tundish according to claim 1 is characterized in that: The breathable plug tooling A and the breathable plug tooling B are customized tooling used to ensure the sealing of the breathable chamber and the construction convenience of the working layer during the construction of the permanent layer and the working layer respectively.

3. The method for installing a gas-permeable brick for detecting the liquid level of molten steel in a continuous casting tundish according to claim 1, characterized in that: Special tool C is a specially designed tool used to ensure the accuracy and stability of the installation when installing the detection vent plug.

4. The method for installing a gas-permeable brick for detecting the liquid level of molten steel in a continuous casting tundish according to claim 1 is characterized in that: High temperature resistant metal pipes and quick connectors are made of high temperature resistant and corrosion resistant materials to ensure stability and durability under high temperature and harsh working conditions.

5. The method for installing a gas-permeable brick for detecting the liquid level of molten steel in a continuous casting tundish according to claim 1 is characterized in that: The method also includes configuring a pneumatic instrument control box and an industrial control host computer in the pneumatic detection system of the tundish liquid level, so as to monitor and control the liquid level of the molten steel in the tundish in real time.

6. The method for installing a gas-permeable brick for detecting the liquid level of molten steel in a continuous casting tundish according to claim 5 is characterized in that: The pneumatic instrument control box and the industrial control host computer are connected with the detection air-permeable bricks and detection pipelines in the tundish through signal transmission lines to realize real-time transmission and processing of data.

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