Tool for cleaning accumulated slag at dust removal flue opening of LF (Ladle Furnace)

Abstract

The utility model discloses a tool for cleaning accumulated slag at a dedusting flue port of an LF (ladle furnace), which relates to the technical field of auxiliary equipment in the metallurgical industry and comprises a grid support and an operating rod piece, the grid support is used for being detachably and fixedly connected with a slag cleaning port at the dedusting flue port of the LF, and the grid support is provided with a plurality of grids; the cleaning end of the operation rod piece is used for penetrating through a grid and being supported on the edge of the grid, the cleaning end of the operation rod piece is used for being inserted into a gap between a flue wall and accumulated slag so as to clean the accumulated slag, the end, away from the cleaning end, of the operation rod piece is the handle end, the handle end is used for being held by an operator, the structure is simple, use is convenient, and practicability is high. Meanwhile, efficient operation of the dust removal system is guaranteed, the field operation environment is improved, and the health of workers is protected.

Description

Technical Field

[0001] This utility model relates to the field of auxiliary equipment technology in the metallurgical industry, and in particular to a tool for cleaning slag buildup at the dust removal flue opening of an LF furnace. Background Technology

[0002] During the LF smelting process, some extremely fine particles from the metallurgical raw materials are drawn into the dust collection system's ash bin, becoming a major component of the refining furnace dust. Additionally, during LF smelting, some raw materials and metals in the electric arc zone vaporize under the high temperatures (3000–6000℃), undergoing a series of chemical reactions. These vaporized particles are then rapidly cooled after entering the dust collection system's pipes and also end up in the ash bin, becoming part of the dust collection system's dust. The main sources and components of the dust collected by the dust collection system are as follows:

[0003] 1) During the LF refining process, some of the LF deoxidizer, slag, alloy and other raw materials are vaporized and evaporated in the electric arc zone, and enter the dust removal system under the suction of the fan.

[0004] 2) Some carbonaceous materials are synthesized, such as carbon raisers and lime slag, which react to form calcium carbide. Small particles are collected by filter bags and enter the dust removal system.

[0005] 3) The small particles in the various deoxidizers used in LF are also excited to vibrate under the impact of electric arc, argon stirring and high temperature conditions, and are drawn into the ash silo by the dust removal system.

[0006] The dust generated by the LF refining furnace is approximately 3 kg per ton of steel. The dust volume is large, characterized by extremely small particles, causing severe pollution during the ash discharge process. To eliminate pollution during ash discharge and unloading, humidification is often required during unloading; that is, the dust is sprayed with water to humidify it while discharging, and then transported by truck. The chemical substances in the dust react with water, releasing toxic and harmful gases such as H2S, C2H2, and PH3.

[0007] In actual production, the large amount of argon gas stirring during the refining process causes splashed steel slag to adhere to the dust collection flue opening. Furthermore, the dust particles generated during the LF furnace smelting process are extremely fine, making them difficult to agglomerate, but they have strong adhesion and will stick to the dust collection flue opening along with the steel slag. As the steel slag and dust accumulate in the flue opening, it narrows and eventually becomes completely blocked, affecting dust collection efficiency. Poor dust collection in the LF furnace not only hinders the maintenance of a clean production site but also exacerbates environmental pollution. Inhaling this dust can cause symptoms such as hoarseness and difficulty breathing for production workers, and long-term work in an environment with poor dust collection can lead to a series of occupational diseases such as pneumoconiosis. An efficient dust collection system can reduce the pollution of the atmosphere by dust, meeting low-carbon emission standards. Therefore, to maintain the efficient operation of the dust collection system, the accumulated slag at the dust collection flue opening must be cleaned regularly.

[0008] There are no specialized slag removal tools available in the current technology. Workers can only use tools such as long steel pipes to remove slag, which is ineffective and time-consuming.

[0009] Therefore, there is an urgent need to design a tool for cleaning the slag buildup at the dust removal flue opening of the LF furnace to solve the problem of the difficulty in cleaning the slag buildup at the dust removal flue opening. Utility Model Content

[0010] The purpose of this utility model is to provide a tool for cleaning slag buildup at the dust removal flue opening of an LF furnace, so as to solve the problems existing in the prior art. It has a simple structure, is easy to use, effectively improves work efficiency, ensures the efficient operation of the dust removal system, improves the on-site working environment, and protects the health of workers.

[0011] To achieve the above objectives, this utility model provides the following solution:

[0012] This utility model provides a tool for cleaning slag accumulation at the flue gas duct opening of an LF furnace, comprising: a grid support and a working rod. The grid support is detachably fixed to the slag cleaning port of the LF furnace flue gas duct and has multiple grids. The cleaning end of the working rod is used to pass through one of the grids and is supported on the edge of the grid. The cleaning end of the working rod is also used to insert into the gap between the flue gas wall and the slag accumulation to clean the slag. The end of the working rod away from the cleaning end is a handle end for the operator to hold.

[0013] Preferably, the grid support has a nine-square grid structure.

[0014] Preferably, the size of the mesh support is the same as the size of the slag removal port.

[0015] Preferably, each of the four corners of the grid support is provided with a circular limiting hole, and the four circular limiting holes are used to cooperate with the four limiting rods of the slag cleaning port so that the limiting rods pass through the circular limiting holes to fix the grid support to the slag cleaning port.

[0016] Preferably, it also includes a pneumatic pick chisel, which is welded and fixedly connected to the cleaning end of the working rod and is arranged coaxially with the working rod.

[0017] Preferably, the jackhammer's chisel has a flat structure.

[0018] Preferably, it also includes a first handle, which is vertically fixedly connected to the handle end of the working rod.

[0019] Preferably, the middle part of the first handle is welded to the working rod.

[0020] Preferably, it also includes two second handles, one end of each of the two second handles being vertically fixedly connected to the working rod, and the second handles being arranged parallel to the first handle, with a distance of 28cm to 32cm between the second handles and the first handle.

[0021] The present invention achieves the following technical advantages over the prior art:

[0022] The purpose of this invention is to provide a tool for cleaning slag accumulation at the flue gas inlet of an LF furnace. The grid bracket's detachable and fixed connection to the slag cleaning port of the LF furnace flue gas inlet allows for easy removal and storage when not in use, and quick installation when cleaning is needed. The multiple grids provide multiple insertion channels for the working rod, allowing for selection of the appropriate grid based on the specific location of the slag, improving the flexibility and targeting of the cleaning process. The working rod is supported by the grid edges, ensuring stable support points during cleaning, allowing for more stable force transfer to the cleaning end when applied by the operator, thus improving the cleaning effect. The handle design facilitates easy gripping and precise control of the operating direction and force of the working rod, enabling effective slag cleaning. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1A schematic diagram of the structure of the tool for cleaning slag deposits at the dust removal flue of an LF furnace provided by this utility model;

[0025] Figure 2 A schematic diagram of the grid support structure in the tool for cleaning slag accumulation at the dust removal flue of an LF furnace provided by this utility model;

[0026] Figure 3 A schematic diagram of the structure of the tool for cleaning slag from the dust removal flue of an LF furnace provided by this utility model during use;

[0027] In the diagram: 1. Working rod; 2. Pneumatic pick chisel; 3. First handle; 4. Second handle; 5. Limiting hole; 6. Grid support; 7. Slag removal port. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] The purpose of this utility model is to provide a tool for cleaning slag buildup at the dust removal flue opening of an LF furnace, so as to solve the problems existing in the prior art. It has a simple structure, is easy to use, effectively improves work efficiency, ensures the efficient operation of the dust removal system, improves the on-site working environment, and protects the health of workers.

[0030] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] Example 1

[0032] This embodiment provides a tool for cleaning accumulated slag at the dust removal flue opening of an LF furnace, such as... Figures 1-3As shown, the device includes a grid support 6 and a working rod 1. The grid support 6 is detachably and fixedly connected to the slag cleaning port 7 of the LF furnace dust collector flue. The grid support 6 has multiple grids. The cleaning end of the working rod 1 passes through a grid and is supported by the edge of the grid. The cleaning end of the working rod 1 is also used to insert into the gaps between the flue wall and the accumulated slag to clean the slag. The end of the working rod 1 furthest from the cleaning end is a handle for the operator to grip. The detachable connection of the grid support 6 to the slag cleaning port 7 of the LF furnace dust collector flue allows the grid support 6 to be easily removed and stored when not in use, and to be quickly installed into the slag cleaning port 7 when needed. The multiple grids provide multiple insertion channels for the working rod 1, allowing the appropriate grid to be inserted into the working rod 1 according to the specific location of the slag, improving the flexibility and targeting of the cleaning process. The working rod 1 is supported by the grid edge, ensuring a stable support point during the slag removal process. This allows the working rod 1 to more stably transfer force to the cleaning end when the operator applies force, improving the slag removal effect. The handle end is designed for easy gripping by the operator, helping to accurately control the operating direction and force of the working rod 1, facilitating effective cleaning of accumulated slag.

[0033] In a preferred embodiment, the grid support 6 has a nine-square grid structure. This structure makes the grid distribution more regular, providing multiple orderly insertion positions for the working rods 1, which can cover the cleaning of slag in different locations of the flue. At the same time, this standard and regular structure facilitates manufacturing and installation positioning, and also makes the grid support 6 structure more stable, better able to withstand the slag cleaning force when supporting the working rods 1.

[0034] In a preferred embodiment, the size of the grid bracket 6 is the same as the size of the ash removal port 7. This ensures a perfect fit between the grid bracket 6 and the ash removal port 7, resulting in a tight fit after installation. This avoids instability or gaps caused by size differences that could affect the ash removal effect. Furthermore, it maximizes coverage of the ash removal port 7 area, allowing the working rod 1 to better clean various locations within the flue when it passes through the grid, reducing blind spots.

[0035] In a preferred embodiment, each of the four corners of the grid support 6 is provided with a circular limiting hole 5. These four circular limiting holes 5 cooperate with the four limiting rods of the slag cleaning port 7, allowing the limiting rods to pass through the circular limiting holes 5 and fix the grid support 6 to the slag cleaning port 7. The cooperation between the circular limiting holes 5 and the limiting rods achieves precise and stable fixing of the grid support 6 to the slag cleaning port 7. During installation, the limiting rods passing through the circular limiting holes 5 can quickly position the grid support 6 in the slag cleaning port 7, ensuring accurate and consistent positioning each time. During the slag cleaning process, this fixing method also effectively prevents the grid support 6 from shifting or shaking, ensuring the stability and accuracy of the working rod 1 during slag cleaning, thereby improving slag cleaning efficiency and quality.

[0036] In a preferred embodiment, the tool for cleaning slag accumulation at the LF furnace dust removal flue inlet also includes a pneumatic pick 2. The pneumatic pick 2 is welded and fixedly connected to the cleaning end of the working rod 1 and is coaxially arranged with the working rod 1. This welding and coaxial connection ensures the stability of the connection between the pneumatic pick 2 and the working rod 1 during operation, allowing the impact force transmitted by the pneumatic pick to be better transferred to the pneumatic pick 2 through the working rod 1, thus enhancing the striking force and effectiveness of the pneumatic pick 2 on the slag accumulation. The coaxial arrangement also makes the force transmission smoother, avoiding energy loss and reduced slag cleaning effect due to force deviation.

[0037] In a preferred embodiment, the pneumatic pick 2 has a flat structure. The flat structure of the pneumatic pick 2 can be better inserted into the gap between the flue wall and the slag. Compared with other shapes, the flat shape makes it easier to find the weak points between the slag and the flue wall, increase the contact area with the slag, and generate greater pressure under the same force, so as to more effectively peel the slag off the flue wall and improve the slag removal efficiency.

[0038] In a preferred embodiment, the tool for cleaning slag deposits at the LF furnace dust removal flue gas inlet further includes a first handle 3, which is vertically fixed to the handle end of the working rod 1. The first handle 3, vertically fixed to the handle end, provides the operator with a component to grip and apply force. This vertical arrangement conforms to ergonomic principles, facilitating the operator's application of force and enabling better control over the direction and force of the working rod 1, thus improving the accuracy and effectiveness of the slag cleaning operation.

[0039] In a preferred embodiment, the middle part of the first handle 3 is welded to the working rod 1, ensuring the firmness and stability of the connection. This welding connection method allows the force on the first handle 3 to be evenly transmitted to the working rod 1, preventing the first handle 3 from loosening or falling off during use due to an unstable connection. It also allows two operators to consistently and stably control the working rod 1 through the first handle 3 for slag removal operations.

[0040] In a preferred embodiment, the tool for cleaning slag deposits at the LF furnace dust collector flue inlet further includes two second handles 4. One end of each second handle 4 is vertically fixedly connected to the working rod 1, and the second handles 4 are arranged parallel to the first handle 3. The distance between the second handles 4 and the first handle 3 is 28cm to 32cm. The arrangement of the two second handles 4 provides the operator with more grip options. The double-handle design allows two operators to easily hold one second handle 4 and part of the first handle 3, enabling the operator to find a more comfortable and easier grip during the slag cleaning process. At the same time, the combined action of two operators can improve the slag cleaning effect. The parallel arrangement with the first handle 3 and the distance of 28cm-32cm ensures both reasonable operating space and facilitates the operator's two-handed coordination, further enhancing the control and precision of the working rod 1, and improving the effect and quality of the slag cleaning operation.

[0041] Example 2

[0042] This embodiment also provides a method for using a tool for cleaning slag deposits at the dust removal flue opening of an LF furnace, as described in Embodiment 1, including the following steps;

[0043] Preliminary preparations

[0044] Before cleaning the slag buildup at the LF furnace dust removal flue inlet, the tools need to be assembled and prepared:

[0045] Select the appropriate grid bracket 6: Confirm that the grid bracket 6 has a nine-grid structure and is the same size as the ash removal port 7 of the LF furnace dust removal flue. Check whether the circular limiting holes 5 at the four corners are intact. Pre-fit the grid bracket 6 and the ash removal port 7 to ensure that they fit perfectly.

[0046] Secure the working rod 1 and related components: Weld the pneumatic pick chisel 2 to the cleaning end of the working rod 1, ensuring that the pneumatic pick chisel 2 and the working rod 1 are coaxial. Simultaneously, vertically fix the first handle 3 to the handle end of the working rod 1, and weld the middle of the first handle 3 firmly to the working rod 1. Additionally, vertically fix two second handles 4 to the working rod 1, making them parallel to the first handles 3 and maintaining a distance of 28cm-32cm between them.

[0047] Tool Connection and Inspection: Connect the assembled working rod 1 to the pneumatic drill, and check whether the connection of the entire tool is secure to ensure that the safety and effectiveness of the operation will not be affected by connection problems.

[0048] Slag removal operation steps

[0049] Install the grid bracket 6: Move the grid bracket 6 to the ash removal port 7 at the dust removal flue of the LF furnace. Pass the four limiting rods of the ash removal port 7 through the circular limiting holes 5 at the four corners of the grid bracket 6 to achieve precise and stable fixing of the grid bracket 6 to the ash removal port 7. This step allows for quick positioning of the grid bracket 6 and ensures that it will not shift or shake during subsequent operations.

[0050] Determine the location of the slag and select the insertion channel: Observe the distribution of the slag in the flue, and select a suitable grid from the nine grids of the grid support 6 as the insertion channel for the working rod 1 based on the specific location of the slag.

[0051] Inserting the working rod 1 for slag removal: Two operators hold the first handle 3 and the second handle 4, inserting the cleaning end of the working rod 1 into the gap between the flue wall and the accumulated slag through the selected mesh. The mesh provides stable support for the working rod 1 during slag removal. When the pneumatic pick is working, its impact force is evenly and smoothly transmitted through the working rod 1 to the flat-structured pneumatic pick chisel 2. The chisel 2, with its flat structure, better inserts into the weak points between the accumulated slag and the flue wall, increasing the contact area and generating greater pressure, thus peeling the slag off the flue wall and effectively cleaning the slag. During the process, by reasonably controlling the magnitude and direction of the force applied by the first handle 3 and the second handle 4, the cleaning position and force of the working rod 1 on the accumulated slag are precisely controlled.

[0052] Post-completion processing

[0053] Disassembly tools: After the slag removal operation is completed, first turn off the pneumatic hammer, then remove the working rod 1 from the grid support 6 and the flue. Next, remove the grid support 6 from the slag removal port 7 and pull it out of the connection with the limiting rod through the circular limiting hole 5.

[0054] Storage and Maintenance: Properly store all disassembled parts for future use. Perform necessary inspections and maintenance on the tools, such as checking for loose welded parts and damage to the pneumatic pick chisel 2, to ensure the tools are in good condition and ready for the next slag removal operation.

[0055] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A tool for cleaning accumulated slag at the dust removal flue opening of an LF furnace, characterized in that: include: A grid support is provided, which is used to be detachably and fixedly connected to the slag removal port of the LF furnace dust removal flue. The grid support is provided with multiple grids. as well as The working rod has a cleaning end for passing through a grid and being supported on the edge of the grid, and the cleaning end for inserting into the gap between the flue wall and the slag to clean the slag. The end of the working rod away from the cleaning end is a handle end for the operator to hold.

2. The tool for cleaning slag accumulation at the flue gas duct of an LF furnace according to claim 1, characterized in that: The grid support has a nine-square grid structure.

3. The tool for cleaning slag accumulation at the dust removal flue opening of the LF furnace according to claim 2, characterized in that: The size of the grid support is the same as the size of the slag removal port.

4. The tool for cleaning slag accumulation at the dust removal flue inlet of the LF furnace according to claim 3, characterized in that: Each of the four corners of the grid support is provided with a circular limiting hole. The four circular limiting holes are used to cooperate with the four limiting rods of the slag cleaning port so that the limiting rods pass through the circular limiting holes to fix the grid support to the slag cleaning port.

5. The tool for cleaning slag accumulation at the dust removal flue inlet of the LF furnace according to claim 4, characterized in that: It also includes a pneumatic pick chisel, which is welded and fixedly connected to the cleaning end of the working rod and is coaxial with the working rod.

6. The tool for cleaning slag accumulation at the dust removal flue inlet of the LF furnace according to claim 5, characterized in that: The chisel of the pneumatic pick has a flat structure.

7. The tool for cleaning slag accumulation at the dust removal flue inlet of the LF furnace according to claim 1, characterized in that: It also includes a first handle, which is vertically fixed to the handle end of the working rod.

8. The tool for cleaning slag accumulation at the dust removal flue opening of an LF furnace according to claim 7, characterized in that: The middle part of the first handle is welded to the working rod.

9. The tool for cleaning slag accumulation at the dust removal flue inlet of an LF furnace according to claim 8, characterized in that: It also includes two second handles, one end of each of the two second handles being vertically fixed to the working rod, and the second handles being arranged parallel to the first handle, with a distance of 28cm to 32cm between the second handles and the first handle.

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