Installation method of three-stage dust removal cover of steelmaking feeding cross

Abstract

The present application provides a kind of installation method of steelmaking feeding cross three times dust hood, comprising the following steps: step one, preparation work;Step two, assemble feeding cross three times dust hood body;Step three, install dust hood suspender system;Step four, hoisting of dust hood body;Step five, install dust hood dust removal pipeline and closed system.The present application optimizes the installation method of existing steelmaking feeding cross three times dust hood, uses existing resource plant installation crawler crane and existing feeding cross travelling crane, assembles dust hood on ground, hoists in block module, effectively saves the use of large hoisting equipment, improves labor efficiency and reduces labor intensity, avoids or reduces the danger brought by high-altitude operation, improves installation control risk, ground assembly is convenient and reliable, improves welding quality, realizes the synchronous installation of steelmaking feeding cross three times dust hood and steelmaking main plant.

Description

Technical Field

[0001] This invention belongs to the field of industrial building installation technology, and in particular relates to an installation method for a three-stage dust removal hood for steelmaking feeding. Background Technology

[0002] The tertiary dust removal system in the steelmaking charging bay primarily uses modular dust removal equipment and piping to effectively absorb the flue gas and dust generated during the steelmaking process when the charging bay crane pours molten iron from the ladle into the steelmaking converter, creating a good working environment for the steelmaking workshop. The tertiary dust removal hood in the steelmaking charging bay is typically an irregularly shaped structure composed of four dust removal hood panels. A section of dust removal pipe extends from the roof of the charging bay via a top-to-bottom configuration and connects to the tertiary dust removal system. The dust removal hood is connected to the roof of the charging bay via a suspension system, ensuring the stability of the hood structure.

[0003] To achieve optimal dust control, the tertiary dust collector hood in the steelmaking charging bay is typically designed with an irregular four-sided structure. It is large in size and heavy in weight (for example, in a medium-sized 200t steelmaking converter, the hood's dimensions are 15m*19m*5.9m, and its total weight reaches 30t). Furthermore, its installation location is directly beneath the roof of the charging bay, requiring suspended and high-altitude work, which is extremely dangerous. If conventional segmented hoisting and aerial assembly methods are used, the numerous hoisting operations, high-altitude assembly, welding, and installation are extremely difficult, resulting in low hoisting efficiency, high costs, and difficulty in guaranteeing the installation quality of the dust collector hood.

[0004] A search revealed relevant patents concerning the hoisting of dust hoods in steelmaking plants. For example, Chinese patent application number 202110582898.8, filed on May 27, 2021, entitled "An Installation Method for a Roof Dust Hood," includes the following steps: First and second tracks are horizontally installed at the top of the columns on both sides of the plant, forming a transport track; a dust hood transport platform is erected at the hoisting end of the transport track, with its bottom slidably positioned on the transport track; the pre-assembled dust hood is hoisted to the top of the transport platform using hoisting equipment; the transport platform moves along the transport track to below the target installation position of the dust hood; the dust hood is lifted using a lifting device; and the dust hood is connected to the roof above the target installation position according to pre-designed construction drawings. This application optimizes the hoisting method, which to some extent solves the problem of large dismantling and restoration work in the traditional dust cover installation technology. However, the installation method is still relatively cumbersome. During hoisting, it is necessary not only to set up the transport track (specifically the bridge crane track) in advance, but also to reserve the upper and lower hoisting spaces in advance, which increases the amount of hoisting work, resulting in low hoisting efficiency and high cost. Summary of the Invention

[0005] 1. The problem to be solved

[0006] The purpose of this invention is to overcome the shortcomings of existing steelmaking charging span tertiary dust collector hoisting operations, such as high hoisting difficulty, low efficiency, and high cost. Instead, it provides an installation method for a steelmaking charging span tertiary dust collector hoist. By optimizing the overall installation method of the dust collector hoist, the smooth implementation of the entire installation process is effectively guaranteed, while improving construction efficiency and ensuring construction quality.

[0007] 2. Technical Solution

[0008] To solve the above problems, the technical solution adopted by the present invention is as follows:

[0009] A method for installing a cross-stage dust collector hood for steelmaking charging includes the following steps:

[0010] Step 1: Preparation: Install and accept the installation environment of the main body of the three-stage dust collector (1) and build an assembly platform (6);

[0011] Step 2: Assemble the main body of the three-stage dust collection hood;

[0012] Step 3: Install the dust collector hood suspension system;

[0013] Step 4: Hoisting of the dust collector hood body;

[0014] Step 5: Install dust collection hoods, dust collection pipes, and sealing systems.

[0015] By utilizing existing resources and factory buildings to install crawler cranes and existing feeding gantry cranes, the dust removal hoods are assembled on the ground and installed in sections and modules, enabling the simultaneous installation of the feeding gantry steelmaking tertiary dust removal hoods and the main steelmaking factory building.

[0016] As a further improvement to the present invention, the preparation work includes the following steps:

[0017] 1.1 The installation and acceptance of the feeding span trolley beam system and roof system located at the installation position of the tertiary dust removal hood body in the feeding span have been completed, and the conditions for the operation of the feeding span trolley and the installation of the tertiary dust removal hood have been met;

[0018] 1.2 Find a site in the steelmaking charging area that is spatially suitable for on-site assembly of the charging area's tertiary dust collector hood, and level and compact the assembly site to ensure that the charging area's tertiary dust collector hood body does not deform during assembly and storage.

[0019] 1.3 Set up an assembly platform on the assembly site. The elevation error of the assembly platform shall be within ±2mm, and the stability of the assembly platform shall meet the requirements for the subsequent material feeding and assembly of the dust collector body.

[0020] 1.4 Based on the drawings of the dust hood and the already arranged assembly platform, set up several assembly supports for the dust hood on the main beam of the assembly platform, and set up several edge positioning devices at the edge of the main beam of the assembly platform.

[0021] As a further improvement of the present invention, the steps for assembling the feeding cross-three dust removal hood body are as follows:

[0022] 2.1 Use a feeding straddle crane to lift the largest and heaviest first dust collector cover. Place the lower edge of the first dust collector cover at the pre-installed edge positioning device. Adjust the placement of the first dust collector cover according to the dimensions in the drawing to ensure that its assembly position matches the drawing. Then, weld and fix the assembly support to the contact point of the first dust collector cover firmly.

[0023] 2.2 Continue to install the third dust collector cover in the relative position using the above method; then install the second and fourth dust collector covers in the same way, thus forming the three-stage dust collector cover body with a four-sided irregular maintenance structure.

[0024] 2.3 Full welding is performed on the butt joints between the first, second, third, and fourth dust collector covers of the dust collector body.

[0025] As a further improvement of the present invention, in step three, the suspension rod system on the four sides of the dust collector body is installed according to the drawings, and two layers of safety life ropes are set on the suspension rod system to serve as the suspension points for the safety belts worn by the construction personnel when the dust collector body 1 is installed in the feeding span.

[0026] As a further improvement of the present invention, the hoisting steps of the dust collector hood body are as follows:

[0027] 4.1 According to the drawings and the weight of the dust collector hood body, dust collector hood lifting lugs shall be set on the first dust collector hood shell. The number and position of the dust collector hood lifting lugs shall be designed to ensure that the entire dust collector hood body is in a balanced state after hoisting.

[0028] 4.2 Use an adjusting hoist and wire rope to hang the main body of the tertiary dust collector in the feeding span on the hook of the feeding span trolley. After lifting, use the adjusting hoist to make fine adjustments to ensure the balance of the main body of the tertiary dust collector in the feeding span throughout the entire lifting process. Then use the feeding span trolley to transfer the dust collector body to the ground directly below the installation position of the dust collector body.

[0029] 4.3 Use the large crawler crane of the feeding span of the main steelmaking plant to lift the body of the tertiary dust collector of the feeding span to its installation position through the pre-reserved lifting hole on the roof of the feeding span. Align the body of the tertiary dust collector of the feeding span according to the dimensions in the drawings, and fully weld the lifting system to the roof beam of the feeding span.

[0030] As a further improvement of the present invention, in step five, a large crawler crane is used to install the pre-reserved roof system of the feeding span, and to hoist the dust removal pipe. After the dust removal pipe is aligned and fixed, the large crawler crane is used to install the sealing plate between the dust removal hood body and the dust removal pipe and to perform full welding. Finally, the safety ropes installed on the hoisting system are removed. It should be noted that before installing the dust removal pipe, a small structure should be installed in the pre-reserved hoisting hole in the roof of the feeding span, then the dust removal pipe should be installed, and finally the sealing plate should be installed. The installation order cannot be reversed.

[0031] As a further improvement of the present invention, multiple assembly supports are provided, all of which are made of H-beams. The assembly supports are located below the first dust collector cover and the third dust collector cover. The slope of the end of the assembly support that contacts the dust collector cover is the same as the slope of the dust collector cover. Furthermore, the number of assembly supports provided below the first dust collector cover is greater than the number of assembly supports provided below the third dust collector cover.

[0032] As a further improvement of the present invention, the assembly support and the edge positioning device are used in combination. The specific method is as follows: the lower part of the hoisted dust hood body is first brought close to the edge positioning device, the center of its placement position is aligned, and then the dust hood body is lowered back and placed against the upper part of the assembly support and welded firmly.

[0033] As a further improvement of the present invention, multiple suspension systems are provided. The installation positions of the suspension systems must be accurate to ensure that after the main body of the tertiary dust collector in the feeding span reaches its installation position, each suspension system is located directly below the roof beam of the feeding span. Furthermore, the length of all suspension systems is 90-110mm longer than the dimensions on the drawings during manufacturing. If the suspension system is too long during installation, it can be cut before installation to ensure that the main body of the tertiary dust collector in the feeding span can be quickly installed in place in one hoisting operation.

[0034] 3. Beneficial effects

[0035] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0036] (1) The overall installation method of the three-stage dust removal hood in the steelmaking charging span of the present invention first installs and accepts the charging span trolley beam system and roof at the installation position of the dust removal hood body. This not only ensures that the assembled dust removal hood can be transported to the installation position directly below by the charging span trolley, but also provides the necessary preconditions for the hoisting of the dust removal hood. The installation work can be completed with the existing equipment in the steelmaking plant, without relying on external hoisting equipment, which greatly saves the installation cost.

[0037] (2) The overall installation method of the tertiary dust collector hood for steelmaking charging span of the present invention, by leveling and compacting the assembly site, ensures that the large-sized, heavy-tonnage tertiary dust collector hood body does not deform during assembly and storage. Simultaneously, it also includes an assembly platform, assembly supports, and edge positioning devices, which not only facilitates precise positioning of each dust collector hood body assembly during assembly but also greatly improves assembly efficiency. Furthermore, compared with existing conventional hoisting methods, the method of the present invention significantly reduces high-altitude operations and offers higher safety.

[0038] (3) The overall installation method of the three-stage dust removal hood in the steelmaking charging span of the present invention, by installing a lifting rod system and accurately setting the installation position and design dimensions of the lifting rod system, can ensure that the main body of the three-stage dust removal hood in the charging span is quickly installed in one go, which greatly improves the lifting efficiency.

[0039] (4) The steelmaking feeding cross-three dust removal hood overall installation method of the present invention saves the use of large lifting equipment, improves labor efficiency and reduces labor intensity, avoids or reduces the dangers caused by high-altitude operations, improves installation control risk, ground assembly is convenient and reliable, improves welding quality, and realizes the synchronous installation of the three dust removal system and the main steel structure. Attached Figure Description

[0040] Figure 1 This is a top view schematic diagram of the overall structure of the material feeding cross-three dust removal hood body in this invention;

[0041] Figure 2 This is a schematic diagram of the internal assembly support of the material feeding cross-three dust removal hood body in this invention;

[0042] Figure 3 This is a schematic diagram of the assembly platform of the three-stage dust removal hood body in this invention;

[0043] Figure 4 This is a schematic diagram of the material feeding process involving the transfer of the dust collector body across three stages in this invention.

[0044] Figure 5 This is a schematic diagram of the hoisting process of the combined dust removal pipe and the three-stage dust removal hood in the present invention.

[0045] In the picture:

[0046] 1. Dust hood body; 1-1. First dust hood shell; 1-2. Second dust hood shell; 1-3. Third dust hood shell; 1-4. Fourth dust hood shell; 2. Dust removal duct; 3. Hanging rod system; 4. Sealing plate; 5. Feeding span roof beam; 6. Assembly platform; 7. Assembly support; 8. Edge positioning device; 9. Dust hood lifting lugs; 10. Adjusting hoist and wire rope; 11. Feeding span trolley; 12. Large crawler crane. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention.

[0048] It should be noted that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to facilitate the description of the present invention and to simplify the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of the present invention.

[0049] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0050] The present invention will be further described below with reference to specific embodiments.

[0051] Example 1

[0052] like Figure 1 and Figure 2 As shown in the figure, the installation method of a steelmaking charging cross-stage dust removal hood in this embodiment includes a dust removal hood body 1 and a dust removal pipe 2. The dust removal hood body 1 is a four-sided irregularly shaped maintenance structure composed of four dust removal hood shells, namely, a first dust removal hood shell 1-1, a second dust removal hood shell 1-2, a third dust removal hood shell 1-3, and a fourth dust removal hood shell 1-4. Among them, the first dust removal hood shell 1-1 is the largest in size and the heaviest in weight. The third dust removal hood shell 1-3 is located opposite the first dust removal hood shell 1-1. The second dust removal hood shell 1-2 and the third dust removal hood shell 1-3 are arranged opposite each other.

[0053] In this embodiment, the method for installing the tertiary dust collector hood in the steelmaking charging bay utilizes existing plant resources, including crawler cranes and existing charging bay overhead cranes, to assemble the dust collector hood on the ground. The hood is then installed in modular sections, allowing for simultaneous installation of the tertiary dust collector hood in the charging bay with the main steelmaking plant building. Specifically, in conjunction with... Figure 2-5 This includes the following steps:

[0054] Step 1: Preparation;

[0055] 1.1 The feeding span trolley beam system and roof system (excluding small structures such as roof purlins and tie rods in the reserved area for dust hood hoisting) located at the installation position of the feeding span tertiary dust hood body 1 are installed and accepted, and have the conditions for the operation of the feeding span trolley and the installation of the tertiary dust hood. This can effectively ensure that the assembled dust hood can be transported to the location directly below the installation position by the feeding span trolley 11, and provides the necessary preconditions for the hoisting of the dust hood.

[0056] 1.2 Find a site in the steelmaking charging area that is spatially suitable for on-site assembly of the charging area's tertiary dust collector hood, and level and compact the assembly site to ensure that the large-sized, heavy-tonnage charging area's tertiary dust collector hood body 1 does not deform during assembly and storage.

[0057] 1.3 Set up an assembly platform 6 on the assembly site, which is made of horizontal and vertical H-beams, and ensure that its elevation error is within ±2mm. At the same time, its stability must also meet the requirements of the subsequent material feeding and dust removal hood body 1 assembly.

[0058] 1.4 Based on the drawings of the dust hood and the already arranged assembly platform 6, set up several assembly supports 7 for the dust hood on the main beam of the assembly platform, and set up several edge positioning devices 8 at the edge of the main beam of the assembly platform 6. The length of the assembly support 7, the angle of the top bevel, and the setting dimensions of the edge positioning devices 8 must be calculated accurately to ensure the accuracy and speed of the assembly of the dust hood body 1 across the third feeding stage in the later stage.

[0059] It should be noted that, as Figure 2 and Figure 3 As shown, the combined support 7 is typically made of H200*200 H-beams, but can also be designed according to the actual size and weight of the dust collector hood. This invention uses the aforementioned dimensions as an example. The height (i.e., length) of the combined support 7 needs to be calculated. The slope of its upper end is the same as the slope of the dust collector hood body 1 across the feeding span. Generally, the combined support 7 is set at the largest first dust collector hood shell 1-1, and also at the third dust collector hood shell 1-3 in the opposite position. It is unnecessary to set supports at adjacent dust collector hood shells (i.e., the second dust collector hood shell 1-2 and the fourth dust collector hood shell 1-4). The larger first dust collector hood shell 1-1 has two combined supports 7, while the opposite third dust collector hood shell 1-3 only needs one combined support 7.

[0060] Meanwhile, similar to the combined support 7, the edge positioning device 8 is usually made of H200*200 steel with a height of 300mm, and its specific fixing position needs to be calculated according to the drawings.

[0061] 2. Assemble the feeding hood across the three-stage dust collection system.

[0062] Using the feeding trolley 11, the largest dust collector cover 1-1 is hoisted, with its lower edge positioned at the pre-installed edge positioning device 8. The placement of the first dust collector cover 1-1 is then adjusted according to the dimensions in the drawings to ensure its assembly position matches the drawings. The assembly support 7 is then welded securely to the contact point between the first dust collector cover 1-1 and the assembly support 7. The third dust collector cover 1-3, located in the opposite position, is installed using the same method. The third dust collector cover 1-3 and the first dust collector cover 1-1... The relative position of the dust collector cover 1-1 must be accurately controlled to facilitate the installation accuracy and speed of the subsequent two cover pieces. Using the above method, install the second dust collector cover 1-2 and the fourth dust collector cover 1-4. In this way, the combination of the four dust collector cover bodies forms the three-stage dust collector cover body 1 with a four-sided irregular maintenance structure. The butt joints between the first dust collector cover 1-1, the second dust collector cover 1-2, the third dust collector cover 1-3, and the fourth dust collector cover 1-4 are fully welded.

[0063] Furthermore, in this embodiment, the assembly supports 7 and edge positioning devices 8 for several dust hoods installed on the main beam of the assembly platform 6 are used in combination. Specifically, the lower part of the hoisted dust hood body 1 is first brought close to the edge positioning device 8, and the center of its placement position is aligned. Then, the dust hood body 1 is lowered back and placed against the upper part of the assembly support 7 and welded firmly. This ensures the accurate positioning of each dust hood body assembly during dust hood assembly, greatly improving assembly efficiency.

[0064] During installation, the largest dust collector cover 1-1 is hoisted first, followed by the corresponding third dust collector cover 1-3. After the first and third dust collector covers 1-1 and 1-3 are fixed, the assembly positions for the adjacent second and fourth dust collector covers 1-2 and 1-4 are reserved. At this point, the remaining two covers can be hoisted in sequence. Therefore, it is not necessary to set up assembly supports 7 for the second and fourth dust collector covers 1-2 and 1-4. This ensures smooth hoisting operations while effectively saving hoisting costs and improving hoisting efficiency.

[0065] 3. Install the dust collector hood suspension system

[0066] like Figure 3 As shown in the drawing, install the dust hood suspension system 3 on the four sides of the dust hood body 1, and set two layers of safety life ropes on the suspension system 3, which will serve as the suspension points for the safety belts worn by the construction workers when the dust hood body 1 is installed in the feeding span.

[0067] It should be noted that the installation positions of all the hanging rod systems 3 must be accurate to ensure that after the main body 1 of the steelmaking tertiary dust removal hood in the feeding span arrives at the installation position, each hanging rod system 3 is exactly below the main beam 5 of the roof of the feeding span. At the same time, the length of all the hanging rod systems 3 should be about 100mm longer than the drawings when they are made. This can make up for the height error caused by the installation of the main beam 5 of the roof of the feeding span. The longer dust removal hood hanging rod systems 3 can be cut and installed, which can ensure that the main body 1 of the tertiary dust removal hood in the feeding span can be quickly installed in place in one hoisting.

[0068] 4. Hoisting of the dust collector hood body

[0069] According to the drawings and weight, four dust collector hood lifting lugs 9 are installed on the first dust collector hood shell 1-1, which is the largest and heaviest. The number of lifting lugs 9 can be designed according to actual needs; this embodiment specifically uses four, but in actual construction, two to six can be used. This embodiment uses four as an example. Installing the lifting lugs 9 on the first dust collector hood shell 1-1 effectively reduces the difficulty of setting up the hoisting wire rope. At the same time, the placement of the lifting lugs 9 must be accurately calculated to ensure the balance of the dust collector hood body 1 during the three transfers and hoisting of the material feeding section. If there is a slight deviation, it can be fine-tuned by adjusting the hoist 9 to prevent imbalance during hoisting and improve operational safety.

[0070] Specifically, such as Figure 4-5 As shown, using an adjusting hoist and wire rope 10, the main body 1 of the three-stage dust removal hood of the feeding span is hung on the hook of the feeding span trolley 11. After being lifted, the adjusting hoist 10 is used for fine adjustment to ensure the balance of the main body 1 of the three-stage dust removal hood of the feeding span throughout the entire lifting process. The main body 1 of the three-stage dust removal hood of the feeding span is then transported to the ground directly below the installation position by the feeding span trolley.

[0071] Then, using the large crawler crane 12 located in the charging span where the main steelmaking plant is installed, the main body 1 of the charging span's tertiary dust collector is hoisted to the installation position through the pre-reserved hoisting hole on the roof of the charging span. The main body 1 of the charging span's tertiary dust collector is aligned according to the dimensions in the drawings, and the hoisting system 3 is fully welded and fixed to the main beam 5 of the charging span's roof.

[0072] 5. Install dust collector hoods, dust collection ducts, and enclosed systems.

[0073] The large crawler crane 12 is used to install the reserved roof system of the feeding span, and to hoist the dust removal hood and dust removal pipe 2. After the dust removal pipe 2 is aligned and fixed, the large crawler crane 12 is used to install the sealing plate 4 between the dust removal hood body and the dust removal pipe and fully weld it. Finally, the safety rope set on the hoisting system 3 is removed.

[0074] The order of the small structure with the pre-reserved hoisting hole in the roof of the supplementary feeding span, the dust removal pipe 2 for installing the dust removal hood, and the sealing plate 4 cannot be reversed, because the support of the dust removal pipe 2 is on the small structure of the roof of the supplementary feeding span with the pre-reserved hole; if the sealing plate 4 is assembled with the dust removal pipe 2 and installed on the body 1 of the tertiary dust removal hood of the feeding span, the small structure of the roof of the supplementary feeding span with the pre-reserved hole will not be able to be installed.

[0075] The present invention provides an overall installation method for the steelmaking charging cross-stage dust removal hood, which saves the use of large lifting equipment, improves labor efficiency and reduces labor intensity, avoids or reduces the dangers of high-altitude operations, improves installation risk control, facilitates ground assembly, is convenient and reliable, improves welding quality, and enables the synchronous installation of the tertiary dust removal system and the main steel structure.

[0076] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for installing a three-stage dust collector hood for steelmaking charging, characterized in that, Includes the following steps: Step 1, Preparation: Inspect the installation environment of the dust collector hood body (1) and build the assembly platform (6); the preparation includes the following steps: 1.1 The feeding trolley beam system and roof system located at the installation position of the dust hood body (1) have been installed and accepted, and are ready for the feeding trolley to operate and the dust hood to be installed three times; 1.2 Find a site in the steelmaking charging area that meets the spatial requirements for on-site assembly of the three dust collectors in the charging area, and flatten and compact the assembly site to ensure that the dust collector body (1) does not deform during assembly and storage. 1.3 Set up an assembly platform (6) on the assembly site. The elevation error of the assembly platform (6) is within ±2mm, and the stability of the assembly platform (6) meets the requirements for the assembly of the dust removal hood body (1) in the later stage. 1.4 Based on the drawings of the dust hood and in conjunction with the already arranged assembly platform (6), a number of dust hood assembly supports (7) are set on the main beam of the assembly platform (6), and a number of edge positioning devices (8) are set at the edge of the main beam of the assembly platform (6). Step 2: Assemble the dust collector cover body (1); The steps are as follows: 2.1 Use the feeding straddle crane (11) to lift the first dust collector cover (1-1) which is the largest and heaviest. Place the lower edge of the first dust collector cover (1-1) at the edge positioning device (8) that has been set up. Adjust the placement position of the first dust collector cover (1-1) according to the dimensions in the drawing. After ensuring that its assembly position matches the drawing, weld the assembly support (7) to the contact point of the first dust collector cover (1-1) to fix it firmly. 2.2 Continue to install the third dust collector cover (1-3) located in the opposite position using the above method; then install the second dust collector cover (1-2) and the fourth dust collector cover (1-4) in the same way to form the dust collector cover body (1). 2.3 Full welding shall be performed on the butt joints between the first dust collector shell (1-1), the second dust collector shell (1-2), the third dust collector shell (1-3), and the fourth dust collector shell (1-4) of the dust collector body (1); Step 3: Install the dust collector hood suspension system (3); Step 4: Hoisting of the dust collector hood body (1); 4.1 According to the drawings and the weight of the dust hood body (1), dust hood lifting lugs (9) are set on the first dust hood shell (1-1). The number and position of the dust hood lifting lugs (9) are designed to ensure that the entire dust hood body (1) is in a balanced state after hoisting. 4.2 Use the adjusting hoist and wire rope (10) to hang the dust hood body (1) on the hook of the feeding trolley (11). After lifting, use the adjusting hoist to make fine adjustments to ensure the balance of the dust hood body (1) throughout the lifting process. Use the feeding trolley (11) to transfer the dust hood body (1) to the ground directly below the installation position of the dust hood body (1). 4.3 Use the large crawler crane (12) of the main steelmaking plant to lift the dust hood body (1) from the pre-reserved hoisting hole on the roof of the main steelmaking plant to its installation position. Align the dust hood body (1) according to the dimensions in the drawings and fully weld the hoisting system (3) to the roof beam (5) of the main steelmaking plant. Step 5: Install the dust removal hood, dust removal pipe (2), and sealing system.

2. The installation method of a steelmaking charging cross-stage dust collector hood according to claim 1, characterized in that: In step three, the hoisting system (3) on the four sides of the dust collector body (1) is installed according to the drawings, and two layers of safety life ropes are set on the hoisting system (3).

3. The installation method of a steelmaking charging cross-stage dust collector hood according to claim 2, characterized in that: In step five, the large crawler crane (12) of the feeding span is used to install the reserved feeding span roof system and hoist the dust removal pipe (2). After the dust removal pipe (2) is aligned and fixed, the large crawler crane (12) of the feeding span is used to install the sealing plate (4) between the dust removal hood body (1) and the dust removal pipe (2) and perform full welding. Finally, the safety rope set on the hoisting system (3) is removed.

4. The installation method of a steelmaking charging cross-stage dust collector hood according to any one of claims 1-3, characterized in that: Multiple assembly supports (7) are provided, all made of H-beams. The assembly supports (7) are located below the first dust collector cover (1-1) and the third dust collector cover (1-3). The slope of the end of the assembly support (7) that contacts the dust collector cover is the same as the slope of the dust collector cover. The number of assembly supports (7) provided below the first dust collector cover (1-1) is greater than the number of assembly supports (7) provided below the third dust collector cover (1-3).

5. The installation method of a steelmaking charging cross-stage dust collector hood according to claim 4, characterized in that: The assembly support (7) and the edge positioning device (8) are used in combination. The specific method is as follows: the lower part of the hoisted dust cover body (1) is first close to the edge positioning device (8), and the center of its placement position is aligned. Then, the dust cover body (1) is lowered back and placed against the upper part of the assembly support (7) and welded firmly.

6. The installation method of a steelmaking charging cross-stage dust collector hood according to any one of claims 1-3, characterized in that: Multiple suspension rod systems (3) are set up. The installation position of the suspension rod system (3) must be accurate to ensure that after the dust hood body (1) reaches its installation position, each suspension rod system (3) is located directly below the roof beam (5) of the material feeding span. All suspension rod systems (3) are made to be 90~110mm longer than the dimensions on the drawing. If the suspension rod system (3) is too long during installation, it can be cut before installation to ensure that the dust hood body (1) is quickly installed in place in one hoisting.

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