Tool for cleaning accumulated slag at dust removal flue opening of LF furnace and using method

Abstract

The invention discloses a tool for cleaning accumulated slag at a dust removal flue opening of an LF furnace and a using method, and relates to the technical field of auxiliary equipment in the metallurgical industry, the tool comprises a grid support and an operation rod piece, the grid support is used for being detachably and fixedly connected with a slag removal opening of the dust removal flue opening of the LF furnace, 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] The present invention relates to the technical field of auxiliary equipment in the metallurgical industry, and particularly relates to a tool for cleaning slag accumulation at the dust removal flue opening of an LF furnace and a usage method thereof. Background Art

[0002] During the smelting process of an LF furnace, extremely fine particles in some metallurgical raw materials will be sucked by the dust removal system into the ash bin of the dust removal system, becoming the main part of the dust removal ash of the refining furnace; in addition, during the LF smelting process, some of the original auxiliary materials and metal materials in the arc area will vaporize under the action of the high temperature (3000 - 6000 °C) in the arc area. During the vaporization process, a series of chemical reactions occur, and after entering the pipeline of the dust removal system, they are rapidly cooled and also enter the ash bin of the dust removal ash system, becoming part of the dust removal ash. The main sources of the dust removal ash of the dust removal system are as follows:

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

[0004] 2) Some carbonaceous materials are synthesized, such as carburizer and slag lime, and react to form calcium carbide, and the small particle part is collected by the cloth bag and enters the dust removal system.

[0005] 3) The small particle part in various deoxidizers used in the LF furnace is also excited to vibrate under the impact of the arc and under the conditions of argon stirring and high temperature, and is sucked into the ash bin by the dust removal system.

[0006] The dust removal ash generated by the LF refining furnace is about 3 kg per ton of steel. The amount of dust is large and its characteristic is that the particles are extremely small, and the pollution is serious during the ash discharging process. In order to eliminate the pollution during the ash discharging and unloading processes, humidification operations are often required during the unloading process, that is, water is sprayed on the dust removal ash while discharging the ash, and then it is transported by truck. The chemical substances in the dust removal ash react with water to precipitate toxic and harmful gases such as H2S, C2H2, and PH3.

[0007] In actual production, due to the large argon stirring during the refining process, the splashed steel slag adheres to the dust removal flue opening. Moreover, during the smelting process in the LF furnace, the generated soot particles are extremely fine, not easy to agglomerate, but have strong adhesiveness, and will adhere to the dust removal flue opening together with the steel slag. As the steel slag and dust accumulate more and more at the flue opening, the flue opening will become smaller until it is completely blocked, affecting the dust removal efficiency. The poor dust removal effect of the LF furnace is not only unfavorable for maintaining the cleanliness of the production site, but also exacerbates environmental pollution. Production workers inhaling these soot will have symptoms such as hoarse throats and difficulty breathing. Working in a working environment with poor dust removal effect for a long time may cause a series of occupational diseases such as pneumoconiosis. An efficient dust removal system can reduce the pollution of soot to the atmosphere and meet the requirements of the national ultra-low carbon emission standards. Therefore, in order to maintain the efficient operation of the dust removal system, it is necessary to regularly clean the accumulated slag at the dust removal flue opening.

[0008] In the prior art, there is no special slag cleaning tool, and workers can only use tools such as long steel pipes to clean the slag, with poor slag cleaning effect and time-consuming and laborious.

[0009] Therefore, it is urgently necessary to design a tool and its use method for cleaning the accumulated slag at the dust removal flue opening of the LF furnace to solve the problem that the accumulated slag at the dust removal flue opening is difficult to clean. Summary of the Invention

[0010] The purpose of the present invention is to provide a tool and its use method for cleaning the accumulated slag at the dust removal flue opening of the LF furnace to solve the problems existing in the above-mentioned prior art, with simple structure, convenient use, effectively improving work efficiency, while ensuring the efficient operation of the dust removal system, improving the on-site operation environment and protecting the health of workers.

[0011] To achieve the above purpose, the present invention provides the following solutions:

[0012] The present invention provides a tool for cleaning the accumulated slag at the dust removal flue opening of the LF furnace, including: a grid bracket and an operating rod. The grid bracket is used for detachably and fixedly connecting with the slag cleaning opening of the dust removal flue opening of the LF furnace. The grid bracket is provided with a plurality of grids; the cleaning end of the operating rod is used to pass through one of the grids and is supported on the edge of the grid, and the cleaning end of the operating rod is used to insert into the gap between the flue wall and the accumulated slag to clean the accumulated slag. One end of the operating rod far from the cleaning end is a handle end for an operator to hold.

[0013] Preferably, the grid bracket is of a nine-square grid structure.

[0014] Preferably, the size of the grid bracket is the same as the size of the slag cleaning opening.

[0015] Preferably, a circular limiting hole is provided at each of the four corners of the grid bracket. 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 bracket and the slag cleaning port.

[0016] Preferably, it further includes a pick bit for pneumatic pick, which is fixedly connected to the cleaning end of the working rod by welding and is coaxially arranged with the working rod.

[0017] Preferably, the pick bit for pneumatic pick is of a flat structure.

[0018] Preferably, it further includes a first handle, which is vertically and 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 further includes two second handles. One ends of the two second handles are respectively vertically and fixedly connected to the working rod, and the second handles are arranged parallel to the first handle. The distance between the second handle and the first handle is 28 cm to 32 cm.

[0021] The present invention also provides a method for using the tool for cleaning the accumulated slag at the dust outlet of the LF furnace dust collector as described in any one of the above, including the following steps;

[0022] Fix the grid bracket to the slag cleaning port of the dust outlet of the LF furnace dust collector;

[0023] Two operators hold the holding ends of the working rod, select a suitable grid as the insertion channel of the working rod, pass the cleaning end of the working rod through the grid to clean the accumulated slag. During the operation of the working rod, with the support of the grid, ensure that the working rod has a stable support point during slag cleaning.

[0024] The present invention has achieved the following technical effects compared with the prior art:

[0025] The object of the present invention is to provide a tool for cleaning slag accumulation at the dust removal flue opening of an LF furnace and a method of using the same. The grid support is detachably and fixedly connected to the slag cleaning opening of the dust removal flue opening of the LF furnace, so that the grid support can be conveniently removed and stored when not in use, and can be quickly installed at the slag cleaning opening when slag accumulation needs to be cleaned. The setting of multiple grids provides multiple insertable channels for the working rod, and the appropriate grid can be selected to insert the working rod according to the specific position of the slag accumulation, improving the flexibility and pertinence of cleaning. The working rod can be supported by the edge of the grid, ensuring a stable support point for the working rod during the slag cleaning process, so that when the operator applies a force, the working rod can more stably transmit the force to the cleaning end, improving the slag cleaning effect. The design of the handle end facilitates the operator to hold, helps to accurately control the operation direction and force of the working rod, and is convenient for effectively cleaning the slag accumulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0027] Figure 1 FIG. is a schematic structural diagram of the tool for cleaning slag accumulation at the dust removal flue opening of the LF furnace provided by the present invention;

[0028] Figure 2 FIG. is a schematic structural diagram of the grid support in the tool for cleaning slag accumulation at the dust removal flue opening of the LF furnace provided by the present invention;

[0029] Figure 3 FIG. is a schematic structural diagram when the tool for cleaning slag accumulation at the dust removal flue opening of the LF furnace provided by the present invention is in use;

[0030] In the figure: 1, working rod; 2, pick bit of pneumatic pick; 3, first handle; 4, second handle; 5, limit hole; 6, grid support; 7, slag cleaning opening. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0032] The object of the present invention is to provide a tool for cleaning the slag accumulation at the dust removal flue opening of an LF furnace and its usage method, so as to solve the problems existing in the above-mentioned prior art. It has a simple structure, is easy to use, effectively improves work efficiency, ensures the efficient operation of the dust removal system at the same time, improves the on-site operation environment and protects the health of workers.

[0033] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] Embodiment 1

[0035] This embodiment provides a tool for cleaning the slag accumulation at the dust removal flue opening of an LF furnace, as Figures 1 to 3 shown, including: a grid bracket 6 and an operation rod 1. The grid bracket 6 is used to be detachably and fixedly connected to the slag cleaning opening 7 of the dust removal flue opening of the LF furnace. The grid bracket 6 is provided with a plurality of grids; the cleaning end of the operation rod 1 is used to pass through a grid and is supported on the edge of the grid, and the cleaning end of the operation rod 1 is used to insert into the gap between the flue wall and the slag accumulation to clean the slag accumulation. The end of the operation rod 1 far from the cleaning end is a handle end, and the handle end is used for an operator to hold. The detachable and fixed connection mode of the grid bracket 6 with the slag cleaning opening 7 of the dust removal flue opening of the LF furnace enables the grid bracket 6 to be conveniently removed and stored when not in use, and can be quickly installed on the slag cleaning opening 7 when the slag accumulation needs to be cleaned. The setting of a plurality of grids provides a plurality of insertable channels for the operation rod 1, and the appropriate grid can be selected according to the specific position of the slag accumulation to insert the operation rod 1, improving the flexibility and pertinence of cleaning. The operation rod 1 can be supported by the grid edge, ensuring that the operation rod 1 has a stable support point during the slag cleaning process, so that when the operator applies a force, the operation rod 1 can more stably transmit the force to the cleaning end, improving the slag cleaning effect. The design of the handle end is convenient for the operator to hold, which helps to accurately control the operation direction and force of the operation rod 1, and is convenient for effectively cleaning the slag accumulation.

[0036] In a preferred embodiment, the grid bracket 6 is of a nine-square grid structure. The nine-square grid structure makes the grid distribution more regular, provides a plurality of orderly insertion position selections for the operation rod 1, and can cover the cleaning of the slag accumulation at different positions of the flue. At the same time, this standard and regular structure is also convenient for production, manufacturing and installation positioning, and also makes the structure of the grid bracket 6 more stable, and can better withstand the slag cleaning force when supporting the operation rod 1.

[0037] In a preferred embodiment, the size of the grid bracket 6 is the same as that of the slag cleaning opening 7. The same size of the grid bracket 6 and the slag cleaning opening 7 ensures a perfect fit between the grid bracket 6 and the slag cleaning opening 7. After installation, they fit tightly, avoiding installation instability caused by size differences or gaps that may affect the slag cleaning effect. And it can cover the area of the slag cleaning opening 7 to the greatest extent, enabling the working rod 1 to better clean various positions in the flue when passing through the grid, reducing the cleaning blind spots.

[0038] In a preferred embodiment, a circular limit hole 5 is provided at each of the four corners of the grid bracket 6. The four circular limit holes 5 are used in cooperation with the four limit rods of the slag cleaning opening 7 so that the limit rods pass through the circular limit holes 5 to fix the grid bracket 6 and the slag cleaning opening 7. The cooperation of the circular limit holes 5 and the limit rods realizes the precise and stable fixation of the grid bracket 6 and the slag cleaning opening 7. During installation, the position of the grid bracket 6 at the slag cleaning opening 7 can be quickly positioned by passing the limit rods through the circular limit holes 5, ensuring that the installation position is accurate and consistent each time. During the slag cleaning process, this fixation method can also effectively prevent the grid bracket 6 from shifting or shaking, ensuring the stability and accuracy of the working rod 1 during slag cleaning, and thus improving the slag cleaning efficiency and quality.

[0039] In a preferred embodiment, the tool for cleaning the accumulated slag at the dust removal flue opening of the LF furnace further includes a pneumatic pick bit 2. The pneumatic pick bit 2 is fixedly connected to the cleaning end of the working rod 1 by welding and is coaxially arranged with the working rod 1. The pneumatic pick bit 2 is welded and coaxially connected to the cleaning end of the working rod 1, which can ensure the connection stability of the pneumatic pick bit 2 with the working rod 1 during operation, enabling the impact force transmitted by the pneumatic pick to be better transmitted to the pneumatic pick bit 2 through the working rod 1, enhancing the hitting force and effect of the pneumatic pick bit 2 on the accumulated slag. The coaxial arrangement can also make the force transmission more smooth, avoiding energy loss and reduction of slag cleaning effect caused by force deviation.

[0040] In a preferred embodiment, the pneumatic pick bit 2 has a flat structure. The flat-structured pneumatic pick bit 2 can better insert into the gap between the flue wall and the accumulated slag. Compared with other shapes, the flat shape is easier to find the weak points between the accumulated slag and the flue wall, increasing the contact area with the accumulated slag. Under the same acting force, it can generate greater pressure and more effectively peel the accumulated slag from the flue wall, improving the slag cleaning efficiency.

[0041] In a preferred embodiment, the tool for cleaning the accumulated slag at the dust removal flue opening of the LF furnace further includes a first handle 3. The first handle 3 is vertically fixedly connected to the handle end of the working rod 1. The first handle 3 is vertically fixed at the handle end, providing an operable and force-applying component for the operator. The vertical setting conforms to the ergonomic principle, facilitating the operator to exert force, enabling the operator to better control the movement direction and force of the working rod 1, and contributing to improving the accuracy and effectiveness of the slag cleaning operation.

[0042] In a preferred embodiment, the middle part of the first handle 3 is welded to the working rod 1. Welding the middle part of the first handle 3 to the working rod 1 ensures the firmness and stability of the connection between the two. The welding connection method can evenly transfer the force received by the first handle 3 to the working rod 1, avoiding loosening or falling off of the first handle 3 due to insecure connection during use. At the same time, it is convenient for two operators to always stably control the working rod 1 through the first handle 3 to perform slag cleaning operations.

[0043] In a preferred embodiment, the slag cleaning tool for the dust removal flue opening of the LF furnace further includes two second handles 4. One end of each of the two second handles 4 is perpendicularly and 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 handle 4 and the first handle 3 is 28 cm to 32 cm. The setting of the two second handles 4 provides more holding options for the operators. The double-handle design enables two operators to hold one second handle 4 and a part of the first handle 3, allowing the operators to find a more comfortable and convenient way to exert force during the slag cleaning process. At the same time, the joint action of the two operators can improve the slag cleaning effect. The setting parallel to the first handle 3 and with a distance of 28 cm - 32 cm not only ensures the rationality of the operation space but also facilitates the cooperation of the operators' two hands to exert force, further enhancing the control strength and accuracy of the working rod 1 and improving the effect and quality of the slag cleaning operation.

[0044] Embodiment Two

[0045] This embodiment also provides a method for using the slag cleaning tool for the dust removal flue opening of the LF furnace as described in Embodiment One, including the following steps:

[0046] Preliminary Preparation

[0047] Before performing the slag cleaning operation on the dust removal flue opening of the LF furnace, it is necessary to complete the assembly and preparation work of the tool:

[0048] Select a suitable grid bracket 6: Confirm that the grid bracket 6 has a nine-square grid structure and the same size as the slag cleaning opening 7 of the dust removal flue opening of the LF furnace, and check whether the circular limit holes 5 at its four corners are intact. Pre-fit the grid bracket 6 with the slag cleaning opening 7 to ensure perfect fit between the two.

[0049] Fix the working rod 1 and related components: Weld and fix the pneumatic pick bit 2 to the cleaning end of the working rod 1 to ensure that the pneumatic pick bit 2 and the working rod 1 are coaxially arranged. At the same time, vertically fix the first handle 3 at the handle end of the working rod 1 and weld the middle part of the first handle 3 firmly to the working rod 1. In addition, vertically fix the two second handles 4 to the working rod 1 respectively, making them parallel to the first handle 3 and maintaining a distance of 28 cm - 32 cm.

[0050] Appliance Connection and Inspection: Connect the assembled working rod 1 to the pneumatic pick, and check whether the connection of the whole tool is firm to ensure that the connection problem will not affect the operation safety and effect during the operation.

[0051] Steps of slag cleaning operation

[0052] Install the grid support 6: Carry the grid support 6 to the slag cleaning port 7 of the dust removal flue of the LF furnace. Pass the four limit rods of the slag cleaning port 7 through the circular limit holes 5 at the four corners of the grid support 6 to achieve accurate and firm fixation of the grid support 6 and the slag cleaning port 7. This step can quickly locate the position of the grid support 6 and ensure that the grid support 6 will not shift or shake during subsequent operations.

[0053] Determine the slag accumulation position and select the insertion channel: Observe the distribution of the slag accumulation in the flue. According to the specific position of the slag accumulation, select a suitable grid from the multiple grids of the nine-square grid of the grid support 6 as the insertion channel for the working rod 1.

[0054] Insert the working rod 1 for slag cleaning: Two operators hold the first handle 3 and the second handle 4, and insert the cleaning end of the working rod 1 into the gap between the flue wall and the slag accumulation through the selected grid. With the support of the grid, ensure that the working rod 1 has a stable support point during slag cleaning. When the pneumatic pick works, its impact force is evenly and smoothly transmitted to the flat-shaped pneumatic pick bit 2 through the working rod 1. The pneumatic pick bit 2 uses its flat-shaped structure to better insert into the weak point between the slag accumulation and the flue wall, increasing the contact area with the slag accumulation and generating greater pressure to peel the slag accumulation from the flue wall, thus realizing effective cleaning of the slag accumulation. During the process, by reasonably controlling the magnitude and direction of the force applied to the first handle 3 and the second handle 4, accurately control the cleaning orientation and strength of the working rod 1 on the slag accumulation.

[0055] Treatment after operation

[0056] Disassemble the tool: After the slag accumulation cleaning operation is completed, first turn off the pneumatic pick, and then remove the working rod 1 from the grid support 6 and the flue. Then disassemble the grid support 6 from the slag cleaning port 7 and pull out the connection with the limit rod through the circular limit hole 5.

[0057] Storage and Maintenance: Properly store the disassembled components for convenient use next time. Conduct necessary inspections and maintenance on the tool, such as checking whether there is looseness at the welded parts and whether the pneumatic pick bit 2 is damaged, etc., to ensure that the tool is in good condition and prepare for the next slag cleaning operation.

[0058] In the present invention, specific examples are used to illustrate the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A tool for cleaning slag accumulation at the dust removal flue of a LF furnace, characterized by: include: A grid bracket, the grid bracket is used to be detachably fixedly connected to the slag removal port of the LF furnace dust removal flue port, and the grid bracket is provided with a plurality of grids; as well as An operating rod, the cleaning end of which is used to pass through one of the grids and be supported on the edge of the grid, and the cleaning end of the operating rod is used to be inserted into the gap between the flue wall and the accumulated slag to clean the accumulated slag, and the end of the operating rod away from the cleaning end is a handle end, and the handle end is used for an operator to hold.

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

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

4. The tool for cleaning slag accumulation at the dust removal flue of a LF furnace according to claim 3, characterized in that: A circular limiting hole is provided at each of the four corners of the grid bracket, 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 bracket to the slag cleaning port.

5. The tool for cleaning slag accumulation at the dust removal flue of a 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 coaxially arranged with the working rod.

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

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

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

9. The tool for cleaning slag accumulation at the dust removal flue of a LF furnace according to claim 8, characterized in that: It also includes two second handles, one end of each of which is vertically fixedly connected to the operating rod, and the second handles are arranged parallel to the first handle, and the distance between the second handles and the first handle is 28cm to 32cm.

10. A method for using the tool for cleaning slag accumulation at the dust removal flue port of a LF furnace according to any one of claims 1 to 9, characterized in that: The steps include: The grid bracket is fixed to the LF furnace dust removal flue port and slag removal port; Two operators hold the holding end of the working rod, select a suitable grid as the insertion channel of the working rod, and pass the cleaning end of the working rod through the grid to clean the accumulated slag. During the operation of the working rod, the grid is used for support to ensure that the working rod has a stable support point when cleaning the slag.

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