Closed structure of a submerged arc furnace for producing high-carbon ferrochrome

Abstract

The utility model discloses a production high carbon ferrochrome's acetylene furnace closed structure, apply to furnace body and furnace cover, be connected with drive mechanism on furnace body, be connected with pressure mechanism on furnace cover, and drive mechanism is connected with pressure mechanism through transmission mechanism, and pressure mechanism includes pressure handle and connecting seat, and pressure handle is equipped with at least three groups, and evenly distributes in furnace cover side edge, and be connected with pressure arm on pressure handle, and be connected with pinion shaft and threaded shaft in proper order below pressure arm, and connecting seat sets up on furnace body, and be equipped with the threaded hole that is matched with threaded shaft on connecting seat, and transmission mechanism includes the gear ring that rotates and connects on furnace body, and gear ring is engaged with pinion shaft. The utility model can when furnace body and furnace cover carry out the connection, and all pressure fixed point position synchronous fixed, and fixed degree is even uniform, guarantees the security and reliability of smelting work.

Description

Technical Field

[0001] This utility model belongs to the field of electric arc furnace technology, specifically relating to a sealed structure for an electric arc furnace for producing high-carbon ferrochrome. Background Technology

[0002] A submerged arc furnace, also known as an electric arc furnace or resistance furnace, is mainly used for the reduction and smelting of ores, carbonaceous reducing agents, and solvents. It primarily produces ferrosilicon, ferromanganese, ferrochrome, ferrotungsten, and ferrosilicon-manganese alloys, which are important industrial raw materials in the metallurgical industry and chemical raw materials such as calcium carbide. In the preparation of high-carbon ferrochrome, chromite, semi-coke, and silica are mixed in a specific ratio and then smelted in a submerged arc furnace. Silica is used as a flux, and semi-coke as a reducing agent to reduce chromium oxide and iron oxide in the chromite. This process requires the use of a submerged arc furnace.

[0003] To ensure stable pressure inside the electric arc furnace, the sealing requirements for the furnace during the smelting process have been gradually increasing. Currently, the connection between the furnace body and the furnace cover of the electric arc furnace is simple, and the fixing method requires fixing one piece at a time around the furnace body. The fixing force at each point cannot be kept even, which makes it difficult to ensure the safety and reliability of the smelting operation. Utility Model Content

[0004] The purpose of this utility model is to provide a sealed structure for a submerged arc furnace for producing high-carbon ferrochrome, which enables all clamping and fixing points to be fixed simultaneously when the furnace body and furnace cover are connected, with uniform and consistent fixing force, thus ensuring the safety and reliability of the smelting operation.

[0005] To achieve the above objectives, this utility model provides a sealed structure for a submerged arc furnace for producing high-carbon ferrochrome, which is applied to the furnace body and furnace cover. A drive mechanism is connected to the furnace body, and a pressing mechanism is connected to the furnace cover. The drive mechanism is connected to the pressing mechanism through a transmission mechanism. The clamping mechanism includes a pressure handle and a connecting seat. There are at least three sets of pressure handles, which are evenly distributed on the side of the furnace cover. A pressure arm is connected to the pressure handle, and a gear shaft and a threaded shaft are connected in sequence below the pressure arm. The connecting seat is located on the furnace body and has a threaded hole that matches the threaded shaft. The transmission mechanism includes a gear ring rotatably connected to the furnace body, which meshes with a gear shaft.

[0006] As a further embodiment of this utility model: the drive mechanism includes a drive motor, a fixed platform supporting the drive motor is provided on the furnace body, and a drive gear is connected to the power output end of the drive motor, the drive gear meshing with the gear ring.

[0007] As a further embodiment of this utility model: a mounting hole is vertically provided on the pressure handle, and a pressure arm is rotatably installed in the mounting hole. The pressure arm includes a connecting column provided in the mounting hole. The top of the connecting column is connected to an upper limit position above the pressure handle, and the bottom of the connecting column is connected to a lower limit position below the pressure handle.

[0008] As a further aspect of this invention, the vertical height of the gear shaft is at least twice the vertical height of the gear ring.

[0009] As a further embodiment of this utility model: a sealing groove is provided on the upper surface of the furnace body, and a sealing gasket is filled in the sealing groove. A sealing protrusion is provided on the lower surface of the furnace cover corresponding to the sealing groove, and the sealing groove and the sealing protrusion are matched.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: The toothed ring can be used to simultaneously fix all the pressure handles of the clamping mechanism installed on the side of the furnace cover, thereby ensuring that the overall connection between the furnace body and the furnace cover is evenly stressed. By using a threaded shaft and a threaded hole for threaded connection, the connection strength between the furnace cover and the furnace body can be gradually strengthened, while ensuring that the furnace body and furnace cover have sufficient connection stability. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the closed structure of an electric arc furnace for producing high-carbon ferrochrome.

[0012] Figure 2 This is a schematic diagram of the closed structure of an electric arc furnace for producing high-carbon ferrochrome (upper limit removed).

[0013] Figure 3 This is a schematic diagram of the separated state structure of a closed submerged arc furnace for producing high-carbon ferrochrome.

[0014] In the diagram: 1. Furnace cover, 2. Upper limit position, 3. Pressure handle, 4. Lower limit position, 5. Gear shaft, 6. Threaded shaft, 7. Connecting seat, 8. Threaded hole, 9. Furnace body, 10. Fixing platform, 11. Drive motor, 12. Drive gear, 13. Gear ring, 14. Connecting column, 15. Mounting hole, 16. Sealing groove, 17. Sealing gasket, 18. Sealing convex ring. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings.

[0016] like Figure 1 and Figure 2 As shown, the closed structure of the electric arc furnace for producing high carbon ferrochrome is applied to the furnace body 9 and the furnace cover 1. The furnace body 9 is connected to a drive mechanism, and the furnace cover 1 is connected to a clamping mechanism. The drive mechanism is connected to the clamping mechanism through a transmission mechanism. The clamping mechanism includes a clamping handle 3 and a connecting seat 7. There are at least three sets of clamping handles 3, which are evenly distributed on the side of the furnace cover 1. The number of clamping handles 3 can be increased according to the actual use requirements and the size of the furnace body 9 and the furnace cover 1 to ensure that the clamping handles 3 have a good working area, thereby ensuring that the connection surface between the furnace cover 1 and the furnace body 9 is uniformly stressed. A clamping arm is connected to the clamping handle 3, and a gear shaft 5 and a threaded shaft 6 are connected in sequence below the clamping arm. The connecting seat 7 is located on the furnace body 9 and has a threaded hole 8 that matches the threaded shaft 6. The gear shaft 5 and the threaded shaft 6 are integrally formed and rotate synchronously with the clamping arm to realize the connection and cooperation between the threaded shaft 6 and the threaded hole 8. The transmission mechanism includes a gear ring 13 rotatably connected to the furnace body 9, which meshes with the gear shaft 5. Using the gear ring 13, all gear shafts 5 can be driven to rotate synchronously, thereby achieving the installation and fixation of all pressure handles 3.

[0017] To achieve synchronous and stable control of multiple pressure handles 3, the drive mechanism further includes a drive motor 11. A fixed platform 10 supporting the drive motor 11 is provided on the furnace body 9. The power output end of the drive motor 11 is connected to a drive gear 12, which meshes with a gear ring 13. The drive motor 11, as the sole power source, drives the gear ring 13 to rotate via the drive gear 12, thereby synchronously driving multiple gear shafts 5 to rotate, completing the installation and fixation of the pressing mechanism.

[0018] Furthermore, the pressure handle 3 is vertically provided with a mounting hole 15, in which a pressure arm is rotatably mounted. The pressure arm includes a connecting post 14 disposed within the mounting hole 15. The top of the connecting post 14 is connected to an upper limit position 2 above the pressure handle 3, and the bottom of the connecting post 14 is connected to a lower limit position 4 below the pressure handle 3. The upper limit position 2 allows the gear shaft 5 to drive the pressure handle 3 downward through the pressure arm to press the connection between the furnace body 9 and the furnace cover 1. The lower limit position 4 allows the gear shaft 5 to drive the pressure handle 3 upward through the pressure arm to separate the connection between the furnace body 9 and the furnace cover 1.

[0019] During the process of pressing the furnace cover 1, the furnace cover 1 needs to be displaced downwards. In order to prevent the gear ring 13 and the gear shaft 5 from being misaligned and separated, the vertical height of the gear shaft 5 is at least twice the vertical height of the gear ring 13, so as to ensure that the gear ring 13 and the gear shaft 5 can always maintain the meshing state during the pressing or separation of the furnace body 9 and the furnace cover 1.

[0020] To ensure a tight seal between the furnace body and the furnace cover, the upper surface of the furnace body 9 is provided with a sealing groove 16, which is filled with a sealing gasket 17. A sealing protrusion 18 is provided on the lower surface of the furnace cover 1 corresponding to the sealing groove 16, and the sealing groove 16 and the sealing protrusion 18 are matched. The sealing gasket 17 is preferably a ceramic fiber rope. The ceramic fiber rope is filled into the sealing groove 16, and when the furnace body 9 and the furnace cover 1 are closed, the ceramic fiber rope is compressed, utilizing its flexibility and high-temperature resistance to achieve a seal.

[0021] It should be noted that this utility model mainly targets the sealed structure of the furnace cover 1 and the furnace body 9, so the drawings have been simplified, retaining only the parts related to this application. In reality, the furnace body 9 and the furnace cover 1 also have other functional structures.

[0022] In practical use, when the furnace cover 1 needs to be tightly connected to the furnace body 9, the furnace cover 1 is lowered so that each threaded shaft 6 corresponds to its respective threaded hole 8. Then, the drive motor 11 is started, and the drive motor 11 drives the drive gear 12 to rotate. The drive gear 12 drives the gear ring 13 to rotate, and the gear ring 13 drives all the gear shafts 5 to rotate synchronously. At the same time, the gear shafts 5 rotate, and the pressure arm and the threaded shafts 6 rotate synchronously, so that the threaded shafts 6 are threadedly connected in the threaded holes 8. The pressure arm drives the pressure handle 3 to move down, so that the furnace cover 1 moves down as a whole and seals and presses tightly with the furnace body 9. When the furnace cover 1 needs to be separated from the furnace body 9, the drive motor 11 is simply reversed to control the gear ring 13 to rotate in the opposite direction, so that the gear shafts 5 rotate in the opposite direction, which drives the threaded shafts 6 to separate from the threaded holes 8. Then, the pressure arm drives the pressure handle 3 and the furnace cover 1 to move up and separate from the furnace body 9.

[0023] The tightening and loosening of the furnace body 9 is determined by the pressure of the air inside the furnace body 9. When the pressure inside the furnace body 9 is too high, the drive motor 11 drives the furnace cover 1 to rise, causing the air pressure inside the furnace body 9 to drop. When the pressure inside the furnace body 9 is too low, the drive furnace cover 1 is driven to fall and tighten for sealing.

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