Novel electric arc furnace
By installing gas deflectors, filter screen plates and anti-flush plates in the exhaust pipes of the arc furnace, the preliminary screening separation of flue gas and impurity collection are achieved, and the problem of high dust content of the arc furnace is solved, which improves the improvement of the improvement of the dust content of the arc furnace. Productivity.
Patent Information
- Application Number
- CN202421166592.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-27
- Publication Date
- 2025-01-10
- Estimated Expiration
- 2034-05-27
AI Technical Summary
The dust content of flue gas discharged during the steelmaking process of the arc furnace is high, which results in a lot of manpower and time required for subsequent gas treatment, which affects production efficiency.
A new type of electric arc furnace was designed, and its exhaust pipe was equipped with a gas deflector, a filter screen plate and a reverse flow prevention plate. These structures were used to realize preliminary screening separation and impurity collection, reducing subsequent gas treatment.
It effectively reduces the time and manpower for flue gas treatment, improves production efficiency, and achieves preliminary gas purification and impurity recovery.
Smart Images
Figure CN222336003U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electric arc furnaces, in particular to a novel electric arc furnace. Background Art
[0002] The electric arc furnace is an electric furnace that uses the high temperature generated by the electrode arc to melt ores and metals. When the gas discharge forms an arc, the energy is very concentrated, and the temperature in the arc zone is above 3000℃. For melting metal, the electric arc furnace has greater process flexibility than other steelmaking furnaces, can effectively remove impurities such as sulfur and phosphorus, the furnace temperature is easy to control, and the equipment occupies a small area, which is suitable for the melting of high-quality alloy steel.
[0003] The process of electric arc furnace steelmaking is short, the equipment is simple, the operation is convenient, it is relatively easy to control pollution, the construction investment is small, the land occupation is small, and it does not need to rely on a complex ironmaking system like converter steelmaking. Electric arc furnace steelmaking has strong adaptability to furnace materials. It uses scrap steel as the main raw material, but it can also use molten iron (blast furnace or cupola iron), sponge iron or hot pressed briquettes, pig iron blocks and other solid and liquid iron-containing raw materials.
[0004] Usually, an electric arc furnace opens a hole in the furnace cover, installs a curved exhaust duct on the furnace top from the hole, and directly extracts the flue gas from the furnace by controlling the exhaust method, which can reduce the amount of flue gas discharged from the furnace door and furnace top, thereby improving the conditions around the electric furnace and reducing the volume of waste gas. However, according to French data, the dust content of steelmaking flue gas from an electric arc furnace is 0.3 to 1.3 grams per cubic meter, an average of 2 grams per cubic meter, and 2.2-19 kilograms of dust are discharged per ton of steel, an average of 5.3 kilograms. Subsequent work requires a lot of manpower and time for gas-solid separation, purification and recovery, which is time-consuming and labor-intensive. Utility Model Content
[0005] The purpose of the utility model includes providing a new type of electric arc furnace, which has an ingenious structural design and can perform preliminary screening and separation on the gas discharged from the furnace in the exhaust pipe while collecting impurities, thereby reducing subsequent gas processing, saving time and labor, and improving production efficiency.
[0006] In order to achieve the above purpose, the preferred solution adopted by the utility model is:
[0007] A novel electric arc furnace comprises a furnace body and an exhaust duct connected to the top of the furnace body; the exhaust duct has an exhaust section; the axis of the exhaust section is perpendicular to the axis of the furnace body; a gas guide plate and a filter screen plate are sequentially arranged in the exhaust section; the gas guide plate is arranged close to the furnace body; one end of the gas guide plate is connected to the bottom of the tube of the exhaust section and close to the furnace body, and the other end extends toward the top of the tube of the exhaust section and away from the furnace body; the two ends of the filter screen plate are respectively connected to the top and bottom of the tube; a slag drop opening is opened at the bottom of the tube between the gas guide plate and the filter screen plate.
[0008] Furthermore, in a preferred embodiment of the present invention, one end of the filter screen is connected to the top of the tube and away from the gas guide plate, and the other end is connected to the bottom of the tube and close to the gas guide plate.
[0009] Furthermore, in a preferred embodiment of the present invention, a backflow prevention plate is also provided in the exhaust section, and the backflow prevention plate and the gas guide plate are respectively provided on both sides of the filter screen plate.
[0010] Furthermore, in a preferred embodiment of the present invention, the backflow prevention plate is hingedly connected to the top of the pipe, and the backflow prevention plate can rotate counterclockwise in the exhaust section.
[0011] Furthermore, in a preferred embodiment of the utility model, a limiting member is also provided in the exhaust section, one end of the limiting member is connected to the top of the tube, and the other end extends toward the bottom of the tube; the limiting member is adjacent to the anti-backflow plate and is provided between the anti-backflow plate and the filter screen plate.
[0012] Furthermore, in a preferred embodiment of the utility model, an ash collecting box is also included, which is arranged below the exhaust section and is connected to the slag dropping port.
[0013] The beneficial effects of a novel electric arc furnace provided by the utility model are:
[0014] The utility model provides a novel electric arc furnace, comprising a furnace body and an exhaust pipe connected to the top of the furnace body. According to the structural design of the exhaust pipe and the design of the connection mode between the exhaust pipe and the furnace body, the novel electric arc furnace is obtained, which has an ingenious structural design, can perform preliminary screening and separation of the gas discharged from the furnace in the exhaust pipe, and can also collect impurities, reduce subsequent gas treatment, save time and labor, and improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.
[0016] Figure 1 A partial structural schematic diagram of a novel electric arc furnace provided in an embodiment of the utility model;
[0017] Figure 2 A schematic cross-sectional view of an exhaust section in an unused state provided by an embodiment of the utility model;
[0018] Figure 3 A cross-sectional schematic diagram of the exhaust section provided in an embodiment of the utility model in use.
[0019] Icons: 10-new electric arc furnace, 100-furnace body, 200-ash box, 300-exhaust duct, 310-exhaust section, 311-limiting part, 312-gas guide plate, 313-filter screen plate, 314-backflow prevention plate, 315-slag outlet. DETAILED DESCRIPTION
[0020] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.
[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0022] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.
[0023] Example 1
[0024] The following is combined with Figure 1-3 The utility model is further described as follows:
[0025] The utility model provides a novel electric arc furnace 10, see Figure 1-3 The novel electric arc furnace 10 comprises a furnace body 100, an ash collecting box 200, and an exhaust duct 300 connected to the top of the furnace body 100. The exhaust duct 300 has an exhaust section 310, and the axis of the exhaust section 310 is perpendicular to the axis of the furnace body 100.
[0026] In this embodiment, a limiting member 311, a gas guide plate 312, a filter screen plate 313 and an anti-backflow plate 314 are arranged in sequence in the exhaust section 310. The gas guide plate 312 is arranged close to the furnace body 100. One end of the gas guide plate 312 is connected to the bottom of the tube of the exhaust section 310 and close to the furnace body 100, and the other end extends toward the top of the tube of the exhaust section 310 and away from the furnace body 100. The above-mentioned design of the gas guide plate 312 is conducive to guiding the flue gas to the top of the exhaust section 310.
[0027] The two ends of the filter screen plate 313 are connected to the top and bottom of the tube respectively. One end of the filter screen plate 313 is connected to the top of the tube and away from the gas guide plate 312, and the other end is connected to the bottom of the tube and close to the gas guide plate 312. A slag drop opening 315 is provided at the bottom of the tube between the gas guide plate 312 and the filter screen plate 313. The ash box 200 is arranged below the exhaust section 310 and communicates with the slag drop opening 315.
[0028] The flue gas flowing into the exhaust section 310 hits the filter screen 313, where solid and gas are separated. The gas passes through the filter screen 313, and the solid falls into the slag outlet 315 and enters the ash box 200 under the action of its own gravity and the guidance of the filter screen 313.
[0029] In this embodiment, the backflow prevention plate 314 and the gas guide plate 312 are respectively arranged on both sides of the filter screen plate 313. The backflow prevention plate 314 is hingedly connected to the top of the tube, and the backflow prevention plate 314 can rotate counterclockwise in the exhaust section 310. One end of the stopper 311 is connected to the top of the tube, and the other end extends toward the bottom of the tube. The stopper 311 is adjacent to the backflow prevention plate 314 and is arranged between the backflow prevention plate 314 and the filter screen plate 313.
[0030] The new electric arc furnace 10 provided in this embodiment works as follows: the flue gas is discharged from the furnace body 100 to the exhaust duct 300 into the exhaust section 310, and is guided to the top of the exhaust section 310 by the gas guide plate 312. The flue gas flowing into the top of the exhaust section 310 then hits the filter screen plate 313, where solid and gas are separated. The gas passes through the filter screen plate 313, and the solid falls into the slag outlet 315 and enters the ash collecting box 200 under the action of its own gravity and the guidance of the filter screen plate 313. The gas continues to flow and breaks open the anti-backflow plate 314, and the anti-backflow plate 314 can only rotate counterclockwise in the exhaust section 310 to prevent the flue gas from flowing back.
[0031] In summary, the novel electric arc furnace 10 provided in this embodiment has an ingenious structural design and can perform preliminary screening and separation on the gas discharged from the furnace in the exhaust duct 300 while also collecting impurities, thereby reducing subsequent gas processing, saving time and effort, and improving production efficiency.
[0032] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. A new type of electric arc furnace, characterized in that: The invention comprises a furnace body and an exhaust pipe connected to the top of the furnace body; the exhaust pipe has an exhaust section; the axis of the exhaust section is perpendicular to the axis of the furnace body; a gas guide plate and a filter screen plate are sequentially arranged in the exhaust section; The gas guide plate is arranged close to the furnace body; one end of the gas guide plate is connected to the bottom of the tube of the exhaust section and is close to the furnace body, and the other end extends toward the top of the tube of the exhaust section and is away from the furnace body; the two ends of the filter screen plate are respectively connected to the top of the tube and the bottom of the tube; a slag drop opening is opened at the bottom of the tube between the gas guide plate and the filter screen plate.
2. The new electric arc furnace according to claim 1 is characterized in that: One end of the filter screen is connected to the top of the tube and is far away from the gas guide plate, and the other end is connected to the bottom of the tube and is close to the gas guide plate.
3. The novel electric arc furnace according to claim 1 is characterized in that: An anti-backflow plate is also arranged in the exhaust section, and the anti-backflow plate and the gas guide plate are respectively arranged on both sides of the filter screen plate.
4. The novel electric arc furnace according to claim 3 is characterized in that: The backflow prevention plate is hingedly connected to the top of the tube, and the backflow prevention plate can rotate counterclockwise in the exhaust section.
5. The novel electric arc furnace according to claim 4 is characterized in that: A limiting member is also provided in the exhaust section, one end of which is connected to the top of the tube and the other end extends toward the bottom of the tube; the limiting member is adjacent to the anti-backflow plate and is provided between the anti-backflow plate and the filter screen plate.
6. The novel electric arc furnace according to claim 1 is characterized in that: It also includes an ash collecting box, which is arranged below the exhaust section and communicated with the slag dropping port.