Efficient decarburization and dephosphorization device of electric arc furnace

Abstract

The utility model is suitable for the technical field of electric arc furnaces, and provides an electric arc furnace efficient decarburization and dephosphorization device which comprises a furnace body, a cover plate is arranged on the top face of the furnace body, an electrode is arranged on the top face of the cover plate in a penetrating mode, the bottom of the electrode extends into the furnace body, and a breather pipe is arranged on the side wall of the furnace body in a penetrating mode. The outlet end of the breather pipe extends to the position below the liquid level of molten steel in the furnace body, the side wall of the furnace body is provided with a feeding hopper in a communicating mode, the furnace body is connected with an oscillation assembly, the front bottom face of the furnace body is provided with a discharging pipe in a communicating mode, and the side wall of the bottom face of the furnace body is provided with a liquid outlet pipe in a communicating mode. Preferably, the oscillation assembly comprises a driving motor, an output shaft of the driving motor is connected with a gear, a rack is arranged on the side wall of the furnace body, and the gear is meshed with the rack. According to the scheme, the breather pipe extends to the position below the liquid level in the furnace body, the uniform mixing rate and the contact rate are guaranteed through oscillation and stirring, the decarburization and dephosphorization efficiency is improved, and use is greatly facilitated.

Description

Technical Field

[0001] This utility model belongs to the field of electric arc furnace technology, and in particular relates to a high-efficiency decarburization and dephosphorization device for electric arc furnaces. Background Technology

[0002] An electric arc furnace (EAF) is a widely used smelting equipment in steelmaking. It primarily uses an electric arc to heat and melt scrap steel or other metallic raw materials, obtaining molten steel after refining. EAFs are typically used in small steel mills, steel reprocessing, or the production of specialty steels.

[0003] Decarburization and dephosphorization in electric arc furnaces are crucial technical steps in steelmaking, especially when producing low-carbon or high-quality steel. An electric arc furnace is a smelting device that uses an electric arc for heating, melting scrap steel through electrode discharge. It is suitable for rapid smelting and small-batch production. Decarburization and dephosphorization are two key issues that need to be addressed in the electric arc furnace smelting process.

[0004] Traditional decarburization methods primarily involve adding oxidants, such as oxygen or iron ore, to oxidize carbon in molten steel into carbon dioxide gas, which then escapes. However, this method often leads to the oxidation of other elements in the molten steel, affecting the quality of the steel. Furthermore, the carbon dioxide gas generated during decarburization increases energy consumption and environmental pollution during the smelting process. For phosphorus removal, dephosphorizing agents, such as lime or dolomite, are added to react with phosphorus in the molten steel, forming phosphate precipitates. These phosphates are then removed from the molten steel through slag-iron separation.

[0005] There are various existing methods for decarburization and dephosphorization in electric arc furnaces, but they generally suffer from problems such as low efficiency, high energy consumption, and poor decarburization and dephosphorization effects. However, this method also suffers from low efficiency, high energy consumption, and unstable dephosphorization effects, making it difficult to guarantee the quality of the steel. Utility Model Content

[0006] The purpose of this invention is to provide a high-efficiency decarburization and dephosphorization device for electric arc furnaces to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a high-efficiency decarburization and dephosphorization device for an electric arc furnace, comprising a furnace body, a cover plate on the top surface of the furnace body, an electrode passing through the top surface of the cover plate, the bottom of the electrode extending into the interior of the furnace body, a vent pipe passing through the side wall of the furnace body, the outlet end of the vent pipe extending below the surface of the molten steel inside the furnace body, a feed hopper connected to the side wall of the furnace body, an oscillation assembly connected to the furnace body, a discharge pipe connected to the bottom surface of the furnace body, and a liquid outlet pipe connected to the bottom side wall of the furnace body.

[0008] Preferably, the oscillation assembly includes a drive motor, the output shaft of which is connected to a gear, and the side wall of the furnace body is provided with a rack, the gear meshing with the rack.

[0009] Preferably, the bottom surface of the furnace body is provided with a support plate, and the top surface of the support plate is provided with a rectangular groove, through which the discharge pipe and the liquid discharge pipe pass.

[0010] Preferably, a fixing frame is provided on the top of one side of the pallet, and the drive motor is fixedly connected to the fixing frame.

[0011] Preferably, the top surface of the cover plate is provided with a rotating motor, the output end of the rotating motor is provided with a rotating shaft, the rotating shaft passes through the cover plate and extends into the interior of the furnace body, and the bottom side wall of the rotating shaft is provided with a stirring rod.

[0012] Preferably, there are several vent pipes, and the several vent pipes are distributed in an equidistant ring.

[0013] This utility model has at least the following beneficial effects:

[0014] This utility model provides a high-efficiency decarburization and dephosphorization device for electric arc furnaces. The gas pipe is extended to below the liquid surface inside the furnace body, and the mixing rate and contact rate are ensured by vibration and stirring, thereby improving the decarburization and dephosphorization efficiency and greatly facilitating use. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the external structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0017] Figure 3 This is a top view of the pallet of this utility model.

[0018] In the attached diagram, the following are the reference numerals: 1. Furnace body; 2. Support plate; 3. Vent pipe; 4. Feed hopper; 5. Cover plate; 6. Electrode; 7. Rotary motor; 8. Rotating shaft; 9. Stirring rod; 10. Discharge pipe; 11. Liquid discharge pipe; 12. Rectangular trough; 13. Rack; 14. Gear; 15. Fixing frame. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. 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 skilled in the art without creative effort are within the scope of protection of the present utility model.

[0020] Example

[0021] Please see Figure 1 , Figure 2 and Figure 3 This utility model provides a technical solution: a high-efficiency decarburization and dephosphorization device for an electric arc furnace, comprising a furnace body 1, a cover plate 5 on the top surface of the furnace body 1, specifically, the cover plate 5 is fixedly connected to the furnace body 1, an electrode 6 is inserted through the top surface of the cover plate 5, specifically, the electrode 6 is fixedly connected to the cover plate 5, the bottom of the electrode 6 extends into the interior of the furnace body 1, a vent pipe 3 is inserted through the side wall of the furnace body 1, specifically, the vent pipe 3 is fixedly connected to the furnace body 1, the outlet end of the vent pipe 3 extends below the surface of the molten steel inside the furnace body 1, a feed hopper 4 is connected to the side wall of the furnace body 1, an oscillation assembly is connected to the furnace body 1, a discharge pipe 10 is connected to the bottom surface of the furnace body 1, and a liquid outlet pipe 11 is connected to the bottom side wall of the furnace body 1.

[0022] In this embodiment, slag and dephosphorizing agent are injected into the furnace body 1 through the feed hopper 4, and oxygen or carbon dioxide is injected below the surface of the molten steel through the vent pipe 3 to improve contact and thus improve the denitrification and dephosphorization efficiency. Arc melting is carried out through the electrode 6.

[0023] Furthermore, the oscillation assembly includes a drive motor, and the output shaft of the drive motor is connected to a gear 14. Specifically, the gear 14 is fixedly connected to the output shaft of the drive motor. The side wall of the furnace body 1 is provided with a rack 13. Specifically, the rack 13 is fixedly connected to the furnace body 1, and the gear 14 meshes with the rack 13.

[0024] In this embodiment, the drive motor drives the gear 14 to rotate back and forth, which in turn drives the rack 13 to move back and forth, thereby causing the furnace body 1 to shake back and forth, improving the mixing effect and thus improving the denitrification and phosphorus removal efficiency.

[0025] Furthermore, the bottom surface of the furnace body 1 is provided with a support plate 2. Specifically, the bottom surface of the support plate 2 is symmetrically and fixedly connected with a support rod. The top surface of the support plate 2 is adapted to the bottom surface of the furnace body 1 and is set in an arc shape. A rectangular groove 12 is provided through the top surface of the support plate 2. The discharge pipe 10 and the liquid discharge pipe 11 pass through the rectangular groove 12. Specifically, the discharge pipe 10 and the liquid discharge pipe 11 can slide inside the rectangular groove 12.

[0026] In this embodiment, a support plate 2 is provided to support the furnace body 1 driven by the oscillation component.

[0027] Furthermore, a fixing frame 15 is provided on the top side of the pallet 2. Specifically, the fixing frame 15 is fixedly connected to the pallet 2, and the drive motor is fixedly connected to the fixing frame 15.

[0028] In this embodiment, the drive motor is fixed by the fixing bracket 15.

[0029] Furthermore, a rotating motor 7 is provided on the top surface of the cover plate 5. Specifically, the rotating motor 7 is fixedly connected to the cover plate 5. The output end of the rotating motor 7 is provided with a rotating shaft 8. The rotating shaft 8 passes through the cover plate 5 and extends into the interior of the furnace body 1. Specifically, the rotating shaft 8 is fixedly connected to the output end of the rotating motor 7 and rotatably connected to the cover plate 5. A stirring rod 9 is provided on the bottom side wall of the rotating shaft 8. Specifically, the stirring rod 9 is fixedly connected to the rotating shaft 8.

[0030] In this embodiment, the rotating shaft 8 is driven to rotate by the rotating motor 7, which in turn drives the stirring rod 9 to stir, thereby improving the decarbonization and phosphorus removal effect.

[0031] Furthermore, there are several ventilation pipes 3, which are distributed in an equidistant ring.

[0032] In this embodiment, several ventilation pipes 3 are installed and inserted into the furnace body 1 in an equidistant ring below the liquid surface to increase the contact rate of oxygen or carbon dioxide.

[0033] The working principle and usage process of this utility model: After the utility model is installed, work according to the above implementation method until all working steps are completed.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this utility model, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency decarburization and dephosphorization device for an electric arc furnace, characterized in that, The furnace includes a furnace body (1), a cover plate (5) on the top surface of the furnace body (1), an electrode (6) passing through the top surface of the cover plate (5), the bottom of the electrode (6) extending into the interior of the furnace body (1), a vent pipe (3) passing through the side wall of the furnace body (1), the outlet end of the vent pipe (3) extending below the surface of the molten steel inside the furnace body (1), a feed hopper (4) connected to the side wall of the furnace body (1), an oscillation assembly connected to the furnace body (1), a discharge pipe (10) connected to the bottom surface of the furnace body (1), and a liquid outlet pipe (11) connected to the bottom side wall of the furnace body (1).

2. The high-efficiency decarburization and dephosphorization device for an electric arc furnace according to claim 1, characterized in that: The oscillation assembly includes a drive motor, the output shaft of which is connected to a gear (14), and the side wall of the furnace body (1) is provided with a rack (13), the gear (14) meshing with the rack (13).

3. The high-efficiency decarburization and dephosphorization device for an electric arc furnace according to claim 2, characterized in that: The bottom surface of the furnace body (1) is provided with a support plate (2), and the top surface of the support plate (2) is provided with a rectangular groove (12). The discharge pipe (10) and the liquid discharge pipe (11) pass through the rectangular groove (12).

4. The high-efficiency decarburization and dephosphorization device for an electric arc furnace according to claim 3, characterized in that: A fixing frame (15) is provided on the top of one side of the pallet (2), and the drive motor is fixedly connected to the fixing frame (15).

5. The high-efficiency decarburization and dephosphorization device for an electric arc furnace according to claim 1, characterized in that: The top surface of the cover plate (5) is provided with a rotating motor (7), the output end of the rotating motor (7) is provided with a rotating shaft (8), the rotating shaft (8) passes through the cover plate (5) and extends into the interior of the furnace body (1), and the bottom side wall of the rotating shaft (8) is provided with a stirring rod (9).

6. The high-efficiency decarburization and dephosphorization device for an electric arc furnace according to claim 1, characterized in that: The ventilation pipe (3) is provided in a plurality of units, and the plurality of ventilation pipes (3) are distributed in an equidistant ring.

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