A non-water burn-through gun carbon rod clamping device for a submerged arc furnace

Abstract

The utility model discloses a kind of waterless burn-through gun carbon rod clamping devices for submerged arc furnace, it is related to the technical field of submerged arc furnace front furnace eye burn-through system technology.The utility model includes connecting assembly and clamping fixed assembly, connecting assembly and clamping fixed assembly are fixedly connected by bolt and nut, the connecting assembly includes connecting seat, the front end of the connecting seat is fixedly connected with electrical terminal, the clamping fixed assembly includes holder, the inner chamber top of the holder is equipped with bushing, the inner chamber of the holder and located below bushing is provided with graphite electrode, the both sides of the top of holder surface are provided with jack. The utility model discloses discarding water cooling structure, from the root, eliminates seepage, water leakage problem, effectively avoids the security risk produced because of water and high temperature molten iron contact, greatly guarantees the personal safety of submerged arc furnace operator and the stable operation of production equipment, provides reliable guarantee for the safety production of submerged arc furnace.

Description

Technical Field

[0001] This utility model belongs to the technical field of furnace hole burning-through system for submerged arc furnaces, and in particular relates to a carbon rod clamping device for a waterless burning-through lance used in submerged arc furnaces. Background Technology

[0002] A submerged arc furnace (SAF) is a type of electric arc furnace. During the tapping process, a burn-through device is used to burn through the furnace opening using an electric arc. The burn-through device is widely used in various large, medium, and small reduction furnaces (such as ferroalloy furnaces, calcium carbide furnaces, and industrial silicon furnaces) to burn through the tapping opening and repair the furnace opening. This burn-through device comes in two forms based on its power supply: one is directly connected to one phase of the low-voltage side of the furnace transformer; the other uses a dedicated single-phase burn-through transformer, whose operating voltage can refer to the normal voltage of the reduction furnace, and the operating current is generally 3000-5000A.

[0003] Currently available graphite electrode rod clamping devices use water-cooled structures, which are prone to water seepage and leakage, causing water droplets to fall into the molten iron ladle and potentially leading to safety accidents. Furthermore, they are inconvenient to disassemble and maintain. Therefore, we provide a waterless carbon rod clamping device for submerged arc furnaces to solve the aforementioned problems. Utility Model Content

[0004] The purpose of this utility model is to provide a waterless carbon rod clamping device for a submerged arc furnace. By cooperating with the connecting components and the clamping and fixing components, it solves the problems of existing clamping devices that use a water-cooled structure, which are prone to water seepage and leakage, causing water droplets to drip into the molten iron ladle and causing safety accidents, and are also inconvenient to disassemble and maintain.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution.

[0006] This utility model relates to a waterless burn-through lance carbon rod clamping device for a submerged arc furnace, comprising a connecting assembly and a clamping and fixing assembly. The connecting assembly and the clamping and fixing assembly are fixedly connected by bolts and nuts. The connecting assembly includes a connecting seat, and an electrical terminal is fixedly connected to the front end of the connecting seat. The clamping and fixing assembly includes a clamp, and a bushing is fitted on the top of the inner cavity of the clamp. A graphite electrode is disposed in the inner cavity of the clamp and below the bushing. Insertion holes are provided on both sides of the top surface of the clamp, and wedges are inserted into the inner cavity of the insertion holes. The bottom of the wedges is in close contact with the top of the bushing.

[0007] The present invention is further configured such that the connecting seat, clamp, bolt, nut and wedge are all made of heat-resistant steel. The heat-resistant steel gives the entire clamping device good high-temperature resistance, enabling it to operate stably for a long time in the high-temperature working environment of the electric arc furnace, and it is not easily damaged by high temperature, thus effectively extending the service life of the device.

[0008] The present invention is further configured such that the surface of the electrical terminal is provided with a mounting hole, and the inner cavity of the mounting hole is connected to the existing burn-through copper busbar by bolts. The mounting hole is connected to the existing burn-through copper busbar by bolts. This connection method is simple and firm, which can ensure the stability of the electrical connection and ensure that the electrical energy can be smoothly transmitted to the graphite electrode, providing stable power support for the burn-through operation.

[0009] The present invention is further configured such that the bushing adopts an arc-shaped design and its inner wall is in close contact with the top of the graphite electrode. The arc-shaped design of the bushing and the close contact between its inner wall and the top of the graphite electrode can better fit the graphite electrode, enhance the fixing effect on the graphite electrode, and at the same time protect the graphite electrode to a certain extent and reduce its wear during the clamping process.

[0010] The present invention is further configured such that the end of the bushing located outside the clamp adopts an arc-shaped upturned design, which can protect the clamp, reduce contact with the furnace eye, and reduce its damage rate.

[0011] The present invention is further provided that a through hole is provided on the surface of the clamp and between the two insertion holes. The presence of the through hole can reduce the weight of the clamp and facilitate observation of the internal condition, making it convenient for maintenance personnel to inspect and maintain the device.

[0012] The present invention is further configured such that a circular hole is provided on the top of the wedge, and two symmetrical circular holes form a group. The circular hole facilitates the operation of the wedge with tools, making it easier to insert or pull the wedge into or out of the insertion hole, thus further improving the ease of use of the device.

[0013] The present invention has the following beneficial effects.

[0014] 1. This utility model eliminates the water-cooling structure, thereby preventing water seepage and leakage problems at the source. It effectively avoids safety hazards caused by water contacting high-temperature molten iron, greatly protects the personal safety of blast furnace operators and the stable operation of production equipment, and provides a reliable guarantee for the safe production of blast furnaces.

[0015] 2. The present invention fully considers the convenience of disassembly and maintenance in its structural design. The components are fixedly connected by bolts and nuts, which is simple and reliable. When replacing the graphite electrode, the wedge can be quickly pulled out and replaced, which greatly shortens the maintenance time, reduces the maintenance cost, and effectively improves the production efficiency of the electric arc furnace. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0017] Figure 1 This is a top view schematic diagram of a waterless carbon rod clamping device for a submerged arc furnace.

[0018] Figure 2 This is a front view schematic diagram of a waterless carbon rod clamping device for a submerged arc furnace.

[0019] Figure 3 This is a right-side schematic diagram of a waterless carbon rod clamping device for a submerged arc furnace.

[0020] Figure 4 This is a right-side cross-sectional schematic diagram of a waterless burning-through lance carbon rod clamping device for a submerged arc furnace.

[0021] In the attached diagram: 1. Connecting assembly; 11. Connecting base; 12. Electrical terminal; 2. Clamping and fixing assembly; 21. Clamp; 22. Bushing; 23. Graphite electrode; 24. Insertion hole; 25. Wedge. Detailed Implementation

[0022] The technical solutions of the present utility model will be described below with reference to the accompanying drawings. The described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Example 1

[0024] Please see Figure 1-4 This utility model is a waterless burning-through lance carbon rod clamping device for a submerged arc furnace, including a connecting component 1 and a clamping and fixing component 2. The connecting component 1 and the clamping and fixing component 2 are fixedly connected by bolts and nuts. The connecting component 1 includes a connecting seat 11, and an electrical terminal 12 is fixedly connected to the front end of the connecting seat 11. The clamping and fixing component 2 includes a clamp 21. A bushing 22 is sleeved on the top of the inner cavity of the clamp 21. A graphite electrode 23 is arranged in the inner cavity of the clamp 21 and below the bushing 22. Insertion holes 24 are opened on both sides of the top surface of the clamp 21. A wedge 25 is inserted into the inner cavity of the insertion hole 24. The bottom of the wedge 25 is in close contact with the top of the bushing 22.

[0025] Specifically, the heat-resistant steel grade is ZG40Cr25Ni20Si2, which has excellent high-temperature resistance, with a maximum operating temperature of 1150-1200℃. It can operate stably for a long time in high-temperature environments. At the same time, a dense oxide film can form on its surface under high-temperature conditions, effectively preventing further oxidation and thus extending its service life. It can also maintain stable performance under rapid temperature changes. It also has excellent mechanical and thermal conductivity properties, can withstand high temperatures and heavy pressure, and ensures the stable operation of equipment.

[0026] Example 2

[0027] Please see Figure 1-4 Based on Embodiment 1, the connecting seat 11, clamp 21, bolt, nut and wedge 25 are all made of heat-resistant steel. The surface of the electrical terminal 12 is provided with mounting holes. The inner cavity of the mounting holes is connected to the existing burn-through copper busbar by bolts. The bushing 22 adopts an arc-shaped design and its inner wall is in close contact with the top of the graphite electrode 23. The end of the bushing 22 located outside the clamp 21 adopts an arc-shaped upturned design. The surface of the clamp 21 and located between the two insertion holes 24 are provided with through holes. The top of the wedge 25 is provided with round holes, and two symmetrical round holes form a set.

[0028] Specifically: The heat-resistant steel gives the entire clamping device excellent high-temperature resistance, enabling it to operate stably for extended periods in the high-temperature environment of an electric arc furnace, and is not easily damaged by high temperatures, effectively extending the device's service life. The mounting holes are connected to the existing burn-through copper busbars via bolts. This connection method is simple and robust, ensuring the stability of the electrical connection and guaranteeing the smooth transmission of electrical energy to the graphite electrode 23, providing stable power support for the burn-through operation. The bushing 22 adopts an arc-shaped design, and its inner wall is in close contact with the top of the graphite electrode 23, allowing for better fit and enhanced fixation of the graphite electrode 23. The bushing 22, located outside the clamp 21, has an arc-shaped raised design at one end, which can protect the clamp 21, reduce contact with the furnace eye, and reduce its damage rate. The through hole can reduce the weight of the clamp 21 and facilitate observation of the internal condition, making it convenient for maintenance personnel to inspect and maintain the device. The round hole makes it easy to use tools to operate the wedge 25, making it easier to insert or pull the wedge 25 into or out of the insertion hole 24, further improving the ease of use of the device.

[0029] The working principle of this utility model is as follows: First, the graphite electrode 23 is placed in the inner cavity of the holder 21, so that the bushing 22 is fitted on the top of the graphite electrode 23. Then, the wedge 25 is inserted into the insertion holes 24 on both sides of the top surface of the holder 21. The bottom of the wedge 25 is in close contact with the top of the bushing 22. Through the squeezing of the wedge 25, the bushing 22 and the graphite electrode 23 are firmly fixed in the holder 21. The power terminal 12 is connected to the existing burn-through copper busbar through the mounting hole to realize the electrical connection with the external circuit, thereby supplying power to the graphite electrode 23. When the furnace hole needs to be burned through when the submerged arc furnace is unloaded, the graphite electrode 23 after being energized generates an electric arc. The high temperature of the electric arc is used to burn through the furnace hole to complete the burn-through operation. When the device malfunctions or the graphite electrode 23 needs to be replaced, the bolts and nuts can be unscrewed and the wedge 25 can be removed to disassemble and repair the device. The operation process is simple and convenient.

[0030] The preferred embodiments of the present utility model disclosed above are only used to help illustrate the present utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the present utility model to the specific implementation methods described. The present specification selects and specifically describes these embodiments in order to better explain the principle and practical application of the present utility model, so that those skilled in the art can better understand and utilize the present utility model.

Claims

1. A waterless burnt-through gun carbon rod clamping device for a submerged arc furnace, comprising a connecting assembly (1) and a clamping and fixing assembly (2), characterized in that: The connecting assembly (1) and the clamping and fixing assembly (2) are fixedly connected by bolts and nuts; The connecting component (1) includes a connecting base (11), and a power terminal (12) is fixedly connected to the front end of the connecting base (11); The clamping and fixing assembly (2) includes a clamp (21), a bushing (22) is fitted on the top of the inner cavity of the clamp (21), a graphite electrode (23) is provided in the inner cavity of the clamp (21) and below the bushing (22), and insertion holes (24) are provided on both sides of the top surface of the clamp (21), and a wedge (25) is inserted into the inner cavity of the insertion hole (24), and the bottom of the wedge (25) is in close contact with the top of the bushing (22).

2. The waterless gun carbon rod holder device for a submerged arc furnace according to claim 1, characterized in that: The connecting seat (11), clamp (21), bolt, nut and wedge (25) are all made of heat-resistant steel.

3. The waterless gun carbon rod holder device for a submerged arc furnace according to claim 1, characterized in that: The surface of the electrical terminal (12) is provided with a mounting hole, and the inner cavity of the mounting hole is connected to the existing burn-through copper busbar by bolts.

4. The waterless gun carbon rod holder device for a submerged arc furnace according to claim 1, characterized in that: The bushing (22) is designed in an arc shape, and its inner wall is in close contact with the top of the graphite electrode (23).

5. The waterless carbon rod clamping device for a submerged arc furnace according to claim 1, characterized in that: The bushing (22) has an arc-shaped raised end located outside the clamp (21).

6. The waterless carbon rod clamping device for a submerged arc furnace according to claim 1, characterized in that: The surface of the clamp (21) is provided with a through hole located between the two insertion holes (24).

7. The waterless carbon rod clamping device for a submerged arc furnace according to claim 1, characterized in that: The top of the wedge (25) is provided with a circular hole, and two symmetrical circular holes form a set.

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