Furnace cover of smelting furnace and electric arc smelting furnace

Abstract

The utility model belongs to the field of smelting furnaces, and particularly relates to a smelting furnace cover and an electric arc smelting furnace, the smelting furnace cover is mainly composed of a first water-cooling plate, a second water-cooling plate and a cylinder connected between the first water-cooling plate and the second water-cooling plate, and in the working process of the electric arc smelting furnace, the first water-cooling plate is connected with the second water-cooling plate; cooling water is introduced into a first water-cooling cavity in the first water-cooling plate and a second water-cooling cavity in the second water-cooling plate, so that the furnace cover of the smelting furnace is cooled, and the influence of high temperature on the installation and operation of corresponding equipment on the furnace cover and the activity occupation operation of personnel is avoided; before being discharged outwards, high-temperature flue gas in the furnace body enters the water-cooling space defined by the first water-cooling plate, the second water-cooling plate and the barrel through the receding hole in the middle of the first water-cooling plate, is cooled in the water-cooling space and then is discharged from the dust suction opening in the side face of the barrel through a pipeline, and compared with direct discharging of the high-temperature flue gas, the high-temperature flue gas is discharged more conveniently. The electric arc smelting furnace using the furnace cover of the smelting furnace does not influence the dust removal performance and the service life of a subsequent bag-type dust remover.

Description

Technical Field

[0001] This application relates to the field of smelting furnace technology, and in particular to a smelting furnace cover and an electric arc smelting furnace. Background Technology

[0002] An electric arc furnace is a metallurgical device that uses an electric arc reaction to generate high temperatures to melt metal raw materials. It is mainly used for smelting steel and other metals. Its working principle is to generate high temperatures exceeding 2000 degrees Celsius through electric arc discharge between electrodes, thereby effectively melting various raw materials such as scrap steel, alloys, and fluxes.

[0003] During smelting, the raw materials need to be heated to thousands of degrees Celsius in a molten state using a smelting furnace. Therefore, the internal temperature of the smelting furnace is extremely high, resulting in a very high temperature on the furnace lid. This makes it difficult to install and operate equipment on the furnace lid, and also hinders personnel movement and operation. Furthermore, the direct discharge of high-temperature flue gas from the dust extraction port on the furnace lid severely affects the dust removal performance and service life of the subsequent baghouse dust collector. Utility Model Content

[0004] This application provides a smelting furnace cover and an electric arc smelting furnace, which aim to reduce the temperature of the furnace cover and cool the high-temperature flue gas.

[0005] Therefore, according to one aspect of this application, a furnace cover for a smelting furnace is provided, comprising:

[0006] The cylinder has a dust extraction port on its side that communicates with the interior of the cylinder.

[0007] A first water-cooled plate is disposed at the bottom of the cylinder body. The first water-cooled plate is used to install on the opening at the top of the furnace body. A clearance hole is provided in the middle of the first water-cooled plate. A first water-cooling cavity is provided inside the first water-cooled plate. A first water inlet pipe and a first water outlet pipe communicating with the first water-cooling cavity are provided on the side of the first water-cooled plate.

[0008] The second water-cooled plate is disposed on the top of the cylinder. The second water-cooled plate is provided with a feeding hole and three electrode holes. The vertical projections of the feeding hole and the three electrode holes all fall into the clearance holes on the first water-cooled plate. The interior of the second water-cooled plate is provided with a second water-cooling cavity. The side of the second water-cooled plate is provided with a second water inlet pipe and a second water outlet pipe that communicate with the second water-cooling cavity.

[0009] Optionally, the first water-cooled plate includes a first bottom plate, a first top plate, a first side plate, and a clearance cylinder. The first top plate and the first bottom plate are spaced apart vertically. Both the first top plate and the first bottom plate have clearance openings in their middle portions. The clearance cylinder is connected between the two clearance openings, and the clearance hole is formed inside the clearance cylinder. The first side plate is connected between the outer edge of the first top plate and the outer edge of the first bottom plate. The first bottom plate, the first top plate, the first side plate, and the clearance cylinder enclose and form the first water-cooled cavity. The first water inlet pipe and the first water outlet pipe are both disposed on the first side plate.

[0010] Optionally, multiple first water inlet pipes are provided, with one of the first water inlet pipes having its outlet end extending near the clearance cylinder.

[0011] Optionally, a plurality of first tie rods are evenly arranged between the first base plate and the first top plate, and the upper and lower ends of the first tie rods are respectively connected to the first base plate and the first top plate.

[0012] Optionally, the second water-cooled plate includes a second bottom plate, a second top plate, a second side plate, a feeding cylinder, and three electrode cylinders. The second top plate and the second bottom plate are spaced apart vertically. Both the second top plate and the second bottom plate are provided with a feeding port and three electrode ports. The feeding cylinder is connected between the feeding port on the second top plate and the feeding port on the second bottom plate, and the feeding hole is formed inside the feeding cylinder. The three electrode cylinders are respectively connected one-to-one between the three electrode ports on the second top plate and the three electrode ports on the second bottom plate, and the three electrode cylinders are respectively formed inside the three electrode holes. The second side plate is connected between the outer edge of the second top plate and the outer edge of the second bottom plate. The second bottom plate, the second top plate, the second side plate, the feeding cylinder, and the three electrode cylinders enclose and form the second water-cooled cavity. The second water inlet pipe and the second water outlet pipe are both provided on the second side plate.

[0013] Optionally, a plurality of second tie rods are evenly arranged between the second base plate and the second top plate, and the upper and lower ends of the second tie rods are respectively connected to the second base plate and the second top plate.

[0014] Optionally, the feeding hole is located in the middle of the second water-cooled plate, and the three electrode holes are arranged around the feeding hole.

[0015] Optionally, multiple second water inlet pipes are provided, and the multiple second water inlet pipes are spaced apart along the circumference of the second water-cooling plate, with the outlet end of one of the second water inlet pipes extending to the feed hole attachment.

[0016] Optionally, the top edge of the second water-cooled plate is provided with a plurality of lifting lugs evenly distributed; the bottom edge of the first water-cooled plate is provided with a flange for connecting to the top opening of the furnace body.

[0017] According to another aspect of this application, an electric arc smelting furnace is provided, including a furnace body and a smelting furnace cover as described above, the smelting furnace cover being disposed on an opening at the top of the furnace body.

[0018] The beneficial effects of the smelting furnace cover and electric arc smelting furnace provided in this application are as follows: Compared with the prior art, the smelting furnace cover of this application is mainly composed of a first water-cooled plate, a second water-cooled plate, and a cylinder connected between the first and second water-cooled plates. During the operation of the electric arc smelting furnace, cooling water is introduced into the first water-cooled cavity inside the first water-cooled plate and the second water-cooled cavity inside the second water-cooled plate to cool the smelting furnace cover, avoiding the impact of high temperature on the installation and operation of the corresponding equipment on the furnace cover and the movement and operation of personnel. Before the high-temperature flue gas in the furnace body is discharged outward, it will enter the water-cooled space formed by the first water-cooled plate, the second water-cooled plate, and the cylinder through the clearance hole in the middle of the first water-cooled plate. After being cooled in the water-cooled space, it will be discharged through the dust extraction port on the side of the cylinder through the pipe. Compared with the direct discharge of high-temperature flue gas, the electric arc smelting furnace using this smelting furnace cover does not affect the dust removal performance and service life of the subsequent bag filter. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] in:

[0021] Figure 1 This is a schematic diagram of the connection structure between the furnace body and the furnace cover in an electric arc smelting furnace according to an embodiment of this application.

[0022] Figure 2 This is a schematic cross-sectional view of the furnace cover at the top opening of the furnace body, as shown in one embodiment of this application.

[0023] Figure 3 This is a schematic diagram of the overall structure of a smelting furnace cover shown in one embodiment of this application;

[0024] Figure 4 This is a disassembly diagram of a smelting furnace cover shown in one embodiment of this application;

[0025] Figure 5This is a schematic diagram of the first top plate on the first water-cooled plate in the furnace cover of a smelting furnace after removal, as shown in one embodiment of this application;

[0026] Figure 6 This is a schematic diagram of the second top plate on the second water-cooled plate in the furnace cover of a smelting furnace after removal, as shown in one embodiment of this application.

[0027] Explanation of key component symbols:

[0028] 10. Furnace body;

[0029] 20. Furnace cover for smelting furnace;

[0030] 100. Cylinder body; 101. Dust extraction port;

[0031] 200. First water-cooling plate; 201. Clearance hole; 202. First water-cooling cavity;

[0032] 210. First base plate; 220. First top plate; 230. First side panel; 240. Clearance tube;

[0033] 250. First inlet pipe; 260. First outlet pipe; 270. First pull rod;

[0034] 300. Second water-cooled plate; 301. Feed hole; 302. Electrode hole; 303. Second water-cooled cavity;

[0035] 310. Second bottom plate; 320. Second top plate; 330. Second side panel; 340. Feeding cylinder;

[0036] 350. Electrode cylinder; 360. Second water inlet pipe; 370. Second water outlet pipe; 380. Second pull rod;

[0037] 400. Hanging lugs;

[0038] 500. Flange. Detailed Implementation

[0039] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings. Preferred embodiments of this application are shown in the drawings. However, this application can be implemented in many other different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of this application.

[0040] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0041] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying 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 limitations on this application.

[0042] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0044] It should also be noted that in the embodiments of this application, the same reference numerals are used to represent the same component or part. For the same part in the embodiments of this application, the reference numerals may only be used to mark one part or component as an example. It should be understood that the reference numerals are also applicable to other identical parts or components.

[0045] According to one aspect of this application, embodiments of this application provide a furnace cover for a smelting furnace, such as... Figures 1-4 As shown, the furnace cover 20 of the smelting furnace includes a cylindrical body 100, a first water-cooled plate 200, and a second water-cooled plate 300. A dust extraction port 101 communicating with the interior of the cylindrical body 100 is provided on the side of the cylindrical body 100. The first water-cooled plate 200 is located at the bottom of the cylindrical body 100 and is used to install on an opening at the top of the furnace body 10. An obstacle hole 201 is provided in the middle of the first water-cooled plate 200. A first water-cooling cavity 202 is provided inside the first water-cooled plate 200. A first water inlet pipe 250 and a first water outlet pipe 260 communicating with the first water-cooling cavity 202 are provided on the side of the first water-cooled plate 200. The second water-cooled plate 300 is disposed on the top of the cylinder 100. The second water-cooled plate 300 is provided with a feeding hole 301 and three electrode holes 302. The vertical projections of the feeding hole 301 and the three electrode holes 302 all fall into the clearance hole 201 on the first water-cooled plate 200. The interior of the second water-cooled plate 300 is provided with a second water-cooling cavity 303. The side of the second water-cooled plate 300 is provided with a second water inlet pipe 360 ​​and a second water outlet pipe 370 communicating with the second water-cooling cavity 303.

[0046] In this embodiment, the furnace cover 20 mainly consists of a first water-cooled plate 200, a second water-cooled plate 300, and a cylindrical body 100 connecting the first water-cooled plate 200 and the second water-cooled plate 300. During the operation of the electric arc smelting furnace, cooling water is introduced into the first water-cooled cavity 202 inside the first water-cooled plate 200 and the second water-cooled cavity 303 inside the second water-cooled plate 300 to cool the furnace cover 20, thus preventing high temperatures from affecting the installation and operation of the corresponding equipment on the furnace cover and personnel. The high-temperature flue gas inside the furnace body 10 will enter the water-cooled space formed by the first water-cooled plate 200, the second water-cooled plate 300 and the cylinder 100 through the avoidance hole 201 in the middle of the first water-cooled plate 200 before being discharged outward. After being cooled down in the water-cooled space, it will be discharged through the dust extraction port 101 on the side of the cylinder 100 via the pipeline. Compared with the direct discharge of high-temperature flue gas, the electric arc smelting furnace using the furnace cover 20 does not affect the dust removal performance and service life of the subsequent bag filter.

[0047] The cylinder 100 and the first water-cooled plate 200, and the cylinder 100 and the second water-cooled plate 300, can be connected by welding or by flanges.

[0048] In one embodiment, such as Figures 2-4 As shown, the first water-cooled plate 200 includes a first bottom plate 210, a first top plate 220, a first side plate 230, and a clearance cylinder 240. The first top plate 220 and the first bottom plate 210 are arranged vertically at intervals. Both the first top plate 220 and the first bottom plate 210 are provided with clearance openings in the middle. The clearance cylinder 240 is connected between the two clearance openings. A clearance hole 201 is formed inside the clearance cylinder 240. The first side plate 230 is connected between the outer edge of the first top plate 220 and the outer edge of the first bottom plate 210. The first bottom plate 210, the first top plate 220, the first side plate 230, and the clearance cylinder 240 enclose each other to form a first water-cooled cavity 202. The first water inlet pipe 250 and the first water outlet pipe 260 are both provided on the first side plate 230.

[0049] Specifically, the first base plate 210, the first top plate 220, the first side plate 230 and the clearance cylinder 240 can be connected and fixed by welding, which is simple to operate.

[0050] Preferably, multiple first water inlet pipes 250 are provided, combined with Figure 5 As shown, the outlet of one of the first water inlet pipes 250 extends to the vicinity of the clearance cylinder 240, while the outlets of the other first water inlet pipes 250 are located at the edge of the first water cooling cavity 202. This design ensures that the entire first water cooling plate 200 dissipates heat evenly.

[0051] To improve the connection strength between the first top plate 220 and the first bottom plate 210, combined with Figure 2 and Figure 5 As shown, multiple first tie rods 270 are evenly arranged between the first base plate 210 and the first top plate 220, and the upper and lower ends of the first tie rods 270 are connected to the first base plate 210 and the first top plate 220 respectively.

[0052] In one embodiment, such as Figures 2-4 As shown, the second water-cooled plate 300 includes a second bottom plate 310, a second top plate 320, a second side plate 330, a feeding cylinder 340, and three electrode cylinders 350. The second top plate 320 and the second bottom plate 310 are arranged vertically at intervals. Both the second top plate 320 and the second bottom plate 310 are provided with a feeding port and three electrode ports. The feeding cylinder 340 is connected between the feeding port on the second top plate 320 and the feeding port on the second bottom plate 310. A feeding hole 301 is formed inside the feeding cylinder 340. The three electrode cylinders 350 are respectively connected to the electrode ports one by one. Between the three electrode ports on the second top plate 320 and the three electrode ports on the second bottom plate 310, three electrode holes 302 are formed inside the three electrode cylinders 350 respectively; the second side plate 330 is connected between the outer edge of the second top plate 320 and the outer edge of the second bottom plate 310, and the second bottom plate 310, the second top plate 320, the second side plate 330, the feeding cylinder 340 and the three electrode cylinders 350 enclose to form a second water cooling cavity 303, and the second water inlet pipe 360 ​​and the second water outlet pipe 370 are both provided on the second side plate 330.

[0053] Specifically, the second base plate 310, the second top plate 320, the second side plate 330, the feeding cylinder 340, and the three electrode cylinders 350 can be connected and fixed by welding, which is simple to operate.

[0054] To improve the connection strength between the second top plate 320 and the second bottom plate 310, combined with Figure 2 and Figure 6 As shown, multiple second tie rods 380 are evenly arranged between the second base plate 310 and the second top plate 320, and the upper and lower ends of the second tie rods 380 are connected to the second base plate 310 and the second top plate 320 respectively.

[0055] In one specific embodiment, such as Figure 3 As shown, the feeding hole 301 is located in the middle of the second water-cooling plate 300, and three electrode holes 302 are arranged around the feeding hole 301. Multiple second water inlet pipes 360 are provided, and the multiple second water inlet pipes 360 are arranged at intervals along the circumference of the second water-cooling plate 300. The water outlet end of one of the second water inlet pipes 360 extends to the vicinity of the feeding hole 301, and the water outlet ends of the other second water inlet pipes 360 are located at the edge of the second water-cooling cavity 303. This design makes the heat dissipation of the entire second water-cooling plate 300 uniform.

[0056] In one embodiment, such as Figures 2-4As shown, the top edge of the second water-cooled plate 300 is evenly provided with multiple lifting lugs 400 for lifting the furnace cover 20 during transportation and installation; the bottom edge of the first water-cooled plate 200 is provided with a flange 500 for connecting the top opening of the furnace body 10. With this design, the first water-cooled plate 200 and the top opening of the furnace body 10 can be connected through the flange 500.

[0057] According to another aspect of this application, embodiments of this application also provide an electric arc smelting furnace, such as... Figure 1 and Figure 2 As shown, it includes a furnace body 10 and a smelting furnace cover 20 in any of the above embodiments, with the smelting furnace cover 20 disposed on the opening at the top of the furnace body 10.

[0058] Because the furnace cover 20 in the above embodiment is used, the high temperature will not affect the installation and operation of the corresponding equipment on the furnace cover or the movement and positioning of personnel during the operation of the electric arc smelting furnace; nor will it affect the dust removal performance and service life of the subsequent bag filter.

[0059] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0060] The above embodiments are merely illustrative of several implementation methods of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A furnace cover for a smelting furnace, characterized in that, include: The cylinder has a dust extraction port on its side that communicates with the interior of the cylinder. The first water-cooled plate is disposed at the bottom of the cylinder. The first water-cooled plate is used to install on the opening at the top of the furnace body. The first water-cooled plate has a clearance hole in the middle and a first water-cooling cavity inside. The side of the first water-cooled plate is provided with a first water inlet pipe and a first water outlet pipe that communicate with the first water-cooling cavity. as well as The second water-cooled plate is disposed on the top of the cylinder. The second water-cooled plate is provided with a feeding hole and three electrode holes. The vertical projections of the feeding hole and the three electrode holes all fall into the clearance holes on the first water-cooled plate. The interior of the second water-cooled plate is provided with a second water-cooling cavity. The side of the second water-cooled plate is provided with a second water inlet pipe and a second water outlet pipe that communicate with the second water-cooling cavity.

2. The furnace cover according to claim 1, characterized in that, The first water-cooled plate includes a first bottom plate, a first top plate, a first side plate, and a clearance cylinder. The first top plate and the first bottom plate are spaced apart vertically. Both the first top plate and the first bottom plate have clearance openings in their middle portions. The clearance cylinder is connected between the two clearance openings, and the clearance hole is formed inside the clearance cylinder. The first side plate is connected between the outer edge of the first top plate and the outer edge of the first bottom plate. The first bottom plate, the first top plate, the first side plate, and the clearance cylinder enclose and form the first water-cooled cavity. The first water inlet pipe and the first water outlet pipe are both disposed on the first side plate.

3. The furnace cover according to claim 2, characterized in that, Multiple first water inlet pipes are provided, one of which has its outlet extending to the vicinity of the clearance cylinder.

4. The furnace cover according to claim 2, characterized in that, Multiple first tie rods are evenly arranged between the first base plate and the first top plate, and the upper and lower ends of the first tie rods are respectively connected to the first base plate and the first top plate.

5. The furnace cover according to claim 1, characterized in that, The second water-cooled plate includes a second bottom plate, a second top plate, a second side plate, a feeding cylinder, and three electrode cylinders. The second top plate and the second bottom plate are arranged vertically at intervals. Both the second top plate and the second bottom plate are provided with a feeding port and three electrode ports. The feeding cylinder is connected between the feeding port on the second top plate and the feeding port on the second bottom plate. The feeding hole is formed inside the feeding cylinder. The three electrode cylinders are respectively connected one-to-one between the three electrode ports on the second top plate and the three electrode ports on the second bottom plate, and the interior of the three electrode cylinders respectively forms three electrode holes; The second side panel is connected between the outer edge of the second top plate and the outer edge of the second bottom plate. The second bottom plate, the second top plate, the second side panel, the feeding cylinder and the three electrode cylinders enclose and form the second water-cooling cavity. The second water inlet pipe and the second water outlet pipe are both disposed on the second side panel.

6. The furnace cover according to claim 5, characterized in that, Multiple second tie rods are evenly arranged between the second base plate and the second top plate, and the upper and lower ends of the second tie rods are respectively connected to the second base plate and the second top plate.

7. The furnace cover of the smelting furnace according to claim 1 or 5, characterized in that, The feeding hole is located in the middle of the second water-cooled plate, and the three electrode holes are arranged around the feeding hole.

8. The furnace cover according to claim 7, characterized in that, Multiple second water inlet pipes are provided, and the multiple second water inlet pipes are arranged at intervals along the circumference of the second water-cooling plate, with the outlet end of one of the second water inlet pipes extending to the feed hole.

9. The furnace cover according to claim 1, characterized in that, The top edge of the second water-cooled plate is evenly provided with multiple lifting lugs; the bottom edge of the first water-cooled plate is provided with a flange for connecting to the top opening of the furnace body.

10. An electric arc smelting furnace, characterized in that, It includes a furnace body and a smelting furnace cover as described in any one of claims 1-9, wherein the smelting furnace cover is disposed on an opening at the top of the furnace body.

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