Slag cleaning device for electric arc furnace

Abstract

The utility model provides a slag cleaning device for an electric arc furnace, which belongs to the technical field of slag cleaning and comprises a frame, a lifting mechanism, a connecting seat, a rotary scraping mechanism and an air blowing component. The lifting mechanism is installed on the rack, and the telescopic end of the lifting mechanism is connected with the connecting base. The rotary scraping mechanism comprises a speed reducing motor, a rotating shaft, a connecting cylinder, two connecting rods and two scraping plates, the speed reducing motor is installed on the connecting base, the two ends of the rotating shaft are connected with the output end of the speed reducing motor and the connecting cylinder respectively, the two connecting rods are arranged on the two sides of the connecting cylinder respectively, and the two connecting rods are connected with the two scraping plates; the scraping plate is a hollow cavity and is provided with an air outlet hole; according to the device, the rotary scraping mechanism and the air blowing assembly are combined for use, slag in the electric arc furnace can be efficiently cleaned, the cleaning efficiency is improved, and the rotary scraping assembly is moved out of the electric arc furnace through the lifting mechanism after the cleaning operation is completed, so that the molten steel smelting effect of the electric arc furnace is prevented from being affected.

Description

Technical Field

[0001] This utility model belongs to the field of slag cleaning technology, specifically relating to a slag cleaning device for electric arc furnaces. Background Technology

[0002] Patent application number 202122053769.8 discloses a converter for steel production with a slag cleaning structure. A motor drives a rotating shaft, causing scrapers to perform cleaning. The scrapers are in close contact with the inner wall of the furnace, scraping away slag as they rotate. A water pump delivers cold water to nozzles via an outlet pipe, which sprays the cold water to cool the furnace interior. This cooling facilitates slag removal by the cleaning mechanism. The cooled water is then drained into a cooling tank through a drain pipe. The cooling pipes inside the cooling tank further cool the water, allowing it to be reused. This creates a good water circulation system and saves on cooling costs.

[0003] An electric arc furnace is an electric furnace that uses the high temperature generated by an electric arc on electrodes to melt ores and metals. It is used to smelt steel blocks into molten steel. After use, slag remains on the inner wall of the electric arc furnace. However, in the current technology, it is difficult to remove the firmly attached slag by simply cleaning it with a scraper. Moreover, after cleaning, the scraper cannot be removed from the electric arc furnace. When the electric arc furnace is used to smelt steel again, the scraper remaining in the furnace will hinder the insertion of the oxygen lance and affect the flow of molten steel, thereby reducing the efficiency of smelting molten steel. Utility Model Content

[0004] Based on the above-mentioned technical problems, the purpose of this utility model is to provide a slag cleaning device for electric arc furnaces. This device uses a combination of a rotating scraper mechanism and an air blowing component to efficiently clean the slag inside the electric arc furnace, thereby improving the cleaning efficiency. After the cleaning operation is completed, the rotating scraper component is moved out of the electric arc furnace by a lifting mechanism, thus avoiding affecting the effect of the electric arc furnace in smelting molten steel.

[0005] The specific technical solution is as follows:

[0006] A slag cleaning device for an electric arc furnace includes: a frame, a lifting mechanism, a connecting seat, a rotating scraping mechanism, and an air blowing assembly; the lifting mechanism is mounted on the frame, and its telescopic end is connected to the connecting seat; the rotating scraping mechanism includes a geared motor, a rotating shaft, a connecting cylinder, two connecting rods, and two scrapers; the geared motor is mounted on the connecting seat, and the two ends of the rotating shaft are respectively connected to the output end of the geared motor and the connecting cylinder; the two connecting rods are respectively located on both sides of the connecting cylinder and are connected to the two scrapers; the scrapers are hollow cavities and have air outlets; the air blowing assembly is mounted on the frame and is connected to the scrapers.

[0007] In addition, the slag cleaning device for electric arc furnaces provided by the present invention may also have the following additional technical features:

[0008] In the above technical solution, the lifting mechanism includes: a fixed seat, a support plate, and an electric push rod; the fixed seat is fixed on the frame, the support plate is set on one side of the fixed seat, and the electric push rod is fixed on the support plate.

[0009] In the above technical solution, the air blowing assembly includes: a high-pressure air pump, a telescopic connecting pipe, and a three-way connecting pipe. The high-pressure air pump is installed in the fixed base, and the output end of the high-pressure air pump is connected to the telescopic connecting pipe. The three-way connecting pipe is installed in the connecting cylinder and the connecting rod. The three-way connecting pipe has one inlet and two outlets. The inlet is connected to the telescopic connecting pipe, and the two outlets are respectively connected to two scrapers.

[0010] The above technical solution also includes: an electric arc furnace moving device, which includes a base, a hydraulic cylinder and a moving seat. The base is located on one side of the frame, the hydraulic cylinder is located on the base, and the telescopic end of the hydraulic cylinder is connected to the moving seat; the electric arc furnace is fixed on the moving seat, and the electric arc furnace and the rotating scraping mechanism are positioned opposite each other.

[0011] In the above technical solution, a limiting post and a position sensor are provided on one side of the base.

[0012] In the above technical solution, the detachable connecting part and the iron removal disc are rotatably connected, and the detachable connecting part is installed at the bottom of the connecting cylinder.

[0013] The slag cleaning device for electric arc furnaces of this utility model has the following advantages compared with the prior art:

[0014] 1. By combining the rotary scraping mechanism and the air blowing component, the slag inside the electric arc furnace can be cleaned efficiently, improving the cleaning efficiency. The scraper adopts a hollow cavity design and is equipped with air outlet holes, realizing the dual cleaning effect of mechanical scraping and air blowing, making the slag on the inner wall of the furnace more thoroughly cleaned.

[0015] 2. The height of the scraper can be adjusted by the lifting mechanism to meet the cleaning needs of different depths of the furnace inner wall, and the scraper can be moved out of the electric arc furnace after cleaning to avoid affecting the normal operation of the electric arc furnace.

[0016] 3. The electric arc furnace moving device controls the movement of the electric arc furnace, allowing the electric arc furnace to flexibly switch operating positions.

[0017] 4. The iron removal disc can adsorb iron particles in the scraped slag, thus separating and recovering the iron from the slag. Attached Figure Description

[0018] Figure 1This is a front view of a slag cleaning device for an electric arc furnace according to the present invention;

[0019] Figure 2 This is a schematic diagram of the structure of a slag cleaning device for an electric arc furnace according to the present invention;

[0020] Figure 3 This is a cross-sectional view of a slag cleaning device for an electric arc furnace according to the present invention;

[0021] in, Figures 1 to 3 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0022] 10 Frame, 11 Connecting seat, 12 Gear motor, 13 Rotary shaft, 14 Connecting cylinder, 15 Connecting rod, 16 Scraper, 17 Air outlet, 18 Fixed seat, 19 Support plate, 20 Electric push rod, 21 High-pressure air pump, 22 Telescopic connecting pipe, 23 T-connecting pipe, 24 Base, 25 Hydraulic cylinder, 26 Moving seat, 27 Limiting column, 28 Position sensor, 29 Detachable connecting part, 30 Iron removal plate, 31 Electric arc furnace. Detailed Implementation

[0023] The following are specific implementation cases and appendices. Figure 1-3 The present invention will be further described below, but the present invention is not limited to these embodiments.

[0024] A slag cleaning device for an electric arc furnace 31, such as Figure 1-3 As shown, the system includes: a frame 10, a lifting mechanism, a connecting seat 11, a rotating scraping mechanism, and an air blowing assembly; the lifting mechanism is mounted on the frame 10, and its telescopic end is connected to the connecting seat 11; the rotating scraping mechanism includes a geared motor 12, a rotating shaft 13, a connecting cylinder 14, two connecting rods 15, and two scrapers 16; the geared motor 12 is mounted on the connecting seat 11, and both ends of the rotating shaft 13 are connected to the output end of the geared motor 12 and the connecting cylinder 14, respectively; the two connecting rods 15 are respectively located on both sides of the connecting cylinder 14, and the two connecting rods 15 are connected to the two scrapers 16; the scraper 16 is a hollow cavity and is provided with an air outlet 17; the air blowing assembly is mounted on the frame 10, and the air blowing assembly is connected to the scraper 16.

[0025] With the above structure, the electric arc furnace 31 is located below the rotating scraping mechanism. The rotating scraping mechanism is controlled to move downward by the lifting mechanism, so that the scraper 16 enters the electric arc furnace 31. The reduction motor 12 runs to make the scraper 16 rotate, scraping off the slag on the inner wall of the electric arc furnace 31. Compressed air is delivered to the scraper 16 through the air blowing component and sprayed out through the air outlet 17 to form a high-speed airflow that impacts the slag surface, loosening the slag. The use of the scraper 16 in conjunction with the scraper can enhance the scraping effect. In addition, the lifting mechanism can also adjust the height of the scraper 16 to meet the cleaning needs of different depths of the inner wall of the furnace.

[0026] After cleaning is completed, the lifting mechanism controls the scraper 16 to move out of the electric arc furnace 31, thereby avoiding affecting the normal operation of the electric arc furnace 31 when it is used to smelt molten steel in the future.

[0027] Specifically, the frame 10 is also provided with a clearance groove to prevent interference between the motor, connecting seat 11 and other components and the frame 10 when the lifting mechanism controls the movement of the rotating scraping mechanism.

[0028] In an embodiment of this utility model, the lifting mechanism includes: a fixed seat 18, a support plate 19, and an electric push rod 20; the fixed seat 18 is fixed on the frame 10, the support plate 19 is disposed on one side of the fixed seat 18, and the electric push rod 20 is fixed on the support plate 19.

[0029] The electric push rod 20 is fixedly supported by the support plate 19. The electric push rod 20 extends and retracts, driving the connecting seat 11 and the rotating scraping mechanism installed on the connecting seat 11 to move up and down, thereby adjusting the height of the scraper 16.

[0030] In an embodiment of this utility model, the air blowing assembly includes: a high-pressure air pump 21, a telescopic connecting pipe 22, and a three-way connecting pipe 23. The high-pressure air pump 21 is installed in the fixed base 18, and the output end of the high-pressure air pump 21 is connected to the telescopic connecting pipe 22. The three-way connecting pipe 23 is installed in the connecting cylinder 14 and the connecting rod 15. The three-way connecting pipe 23 has one inlet and two outlets. The inlet is connected to the telescopic connecting pipe 22, and the two outlets are respectively connected to two scrapers 16.

[0031] The high-pressure air pump 21 operates to output high-pressure airflow, which enters the two scrapers 16 through the telescopic connecting pipe 22 and the three-way connecting pipe 23 respectively, and is ejected through the air outlet 17 of the scraper 16 to loosen the slag so that the scraper 16 can scrape it off, thereby improving the slag cleaning effect.

[0032] The design of the telescopic connecting pipe 22 enables the electric push rod 20 to play a distance compensation role when controlling the scraper 16 to move up and down, thereby ensuring that the gas can flow smoothly into the three-way connecting pipe 23.

[0033] Specifically, in this embodiment, the high-pressure air pump 21 is a vortex air pump of model 4RB420 manufactured by Wuxi Gezhiling Electromechanical Equipment Co., Ltd.

[0034] In an embodiment of this utility model, it further includes: an electric arc furnace 31 moving device, which includes a base 24, a hydraulic cylinder 25 and a moving seat 26. The base 24 is disposed on one side of the frame 10, the hydraulic cylinder 25 is disposed on the base 24, and the telescopic end of the hydraulic cylinder 25 is connected to the moving seat 26; the electric arc furnace 31 is fixed on the moving seat 26, and the electric arc furnace 31 is positioned opposite to the rotating scraping mechanism.

[0035] The hydraulic cylinder 25 drives the movable seat 26 to move, thereby moving the position of the electric arc furnace 31. When it is necessary to clean the slag of the electric arc furnace 31, the hydraulic cylinder 25 controls the electric arc furnace 31 to move below the scraper 16. When it is necessary to smelt steel in the electric arc furnace 31, the hydraulic cylinder 25 moves the electric arc furnace 31 out of the area of ​​the scraper 16, thereby achieving the purpose of freely switching the position of the electric arc furnace 31.

[0036] In an embodiment of this utility model, a limiting post 27 and a position sensor 28 are provided on one side of the base 24.

[0037] The position of the movable seat 26 is monitored by the position sensor 28. When the hydraulic cylinder 25 controls the movable seat 26 to move and contact the position sensor 28, the position sensor 28 transmits the received signal to the controller, which then controls the hydraulic cylinder 25 to stop. The limit post 27 limits the position of the movable seat 26. If a signal transmission error occurs, the limit post 27 allows the operator to visually observe whether the position of the movable seat 26 is correct, thereby ensuring that the position of the electric arc furnace 31 is relative to the position of the scraper 16 and avoiding center offset.

[0038] Specifically, when installing the position of the limit post 27 and the position sensor 28, it is necessary to first measure whether the positions of the scraper 16 and the rotating shaft 13 correspond to the inner wall and center position of the electric arc furnace 31, respectively. After confirming that the positions are correct, the limit post 27 and the position sensor 28 can be installed.

[0039] In an embodiment of this utility model, the detachable connecting part 29 and the iron removal disc 30 are rotatably connected, and the detachable connecting part 29 is installed at the bottom of the connecting cylinder 14.

[0040] By installing the detachable connecting part 29 at the bottom of the connecting cylinder 14 through the fastener, the operator can freely choose whether to install the iron removal disc 30. When the iron removal disc 30 is installed, during the cleaning of the slag by the combination of scraper 16 and air blowing, the iron removal disc 30 adsorbs iron particles in the slag so as to recycle and reprocess the iron material.

[0041] Specifically, the iron removal pan 30 is equipped with an electromagnet, which generates a magnetic field to attract iron particles in the slag. After the cleaning operation is completed, the electric push rod 20 controls the scraper 16 to rise, which in turn moves the iron removal pan 30 upward until it is removed from the electric arc furnace 31, and the remaining slag can be discharged through the slag discharge port of the electric arc furnace 31.

[0042] Specifically, by providing a ball bearing between the detachable connecting part 29 and the iron removal disc 30, with the inner ring of the ball bearing installed on the detachable connecting part 29 and the outer ring installed on the iron removal disc 30, relative rotation is achieved using the ball bearing, so that when the connecting cylinder 14 drives the detachable connecting part 29 to rotate, the iron removal disc 30 does not rotate.

[0043] Specifically, in this embodiment, the iron removal disc 30 adopts the RCDB series dry electromagnetic separator manufactured by Linqu Hengjie Magnetoelectric Equipment Co., Ltd.

[0044] Implementation process: By positioning the electric arc furnace 31 below the rotating scraping mechanism, the lifting mechanism controls the rotating scraping mechanism to move downwards, allowing the scraper 16 to enter the electric arc furnace 31. The reduction motor 12 operates, causing the scraper 16 to rotate and scrape off the slag from the inner wall of the electric arc furnace 31. Compressed air is delivered to the scraper 16 through the air blowing assembly and ejected through the air outlet 17, forming a high-speed airflow that impacts the slag surface, loosening the slag. This, combined with the scraper 16, enhances the scraping effect. The lifting mechanism can also adjust the height of the scraper 16 to meet the cleaning needs of different depths of the furnace inner wall. After cleaning is completed, the lifting mechanism controls the scraper 16 to move out of the electric arc furnace 31, thus preventing any disruption to the normal operation of the electric arc furnace 31 during subsequent steel smelting.

[0045] In the description of this utility model, the term "multiple" refers to two or more. Unless otherwise explicitly defined, the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model. The terms "connection," "installation," "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0046] In the description of this utility model, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this utility model, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0047] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A slag cleaning device for an electric arc furnace, characterized in that include: The machine comprises a frame, a lifting mechanism, a connecting seat, a rotating scraping mechanism, and an air-blowing assembly. The lifting mechanism is mounted on the frame, and its telescopic end is connected to the connecting seat. The rotating scraping mechanism includes a geared motor, a rotating shaft, a connecting cylinder, two connecting rods, and two scrapers. The geared motor is mounted on the connecting seat, and both ends of the rotating shaft are connected to the output end of the geared motor and the connecting cylinder, respectively. The two connecting rods are respectively located on both sides of the connecting cylinder and are connected to the two scrapers. The scrapers are hollow cavities and have air outlets. The air-blowing assembly is mounted on the frame and is connected to the scrapers.

2. A slag cleaning device for an electric arc furnace according to claim 1, characterized in that The lifting mechanism includes: a fixed base, a support plate, and an electric push rod; the fixed base is fixed on the frame, the support plate is disposed on one side of the fixed base, and the electric push rod is fixed on the support plate.

3. A slag cleaning device for an electric arc furnace according to claim 2, characterized in that The air blowing assembly includes: a high-pressure air pump, a telescopic connecting pipe, and a three-way connecting pipe. The high-pressure air pump is installed in the fixed base, and the output end of the high-pressure air pump is connected to the telescopic connecting pipe. The three-way connecting pipe is installed in the connecting cylinder and the connecting rod. The three-way connecting pipe has one inlet and two outlets. The inlet is connected to the telescopic connecting pipe, and the two outlets are respectively connected to the two scrapers.

4. A slag cleaning device for an electric arc furnace according to claim 1, characterized in that Also includes: An electric arc furnace moving device includes a base, a hydraulic cylinder, and a moving seat. The base is located on one side of the frame, the hydraulic cylinder is mounted on the base, and the telescopic end of the hydraulic cylinder is connected to the moving seat. The electric arc furnace is fixed on the moving seat, and the electric arc furnace is positioned opposite the rotating scraper mechanism.

5. A slag cleaning device for an electric arc furnace according to claim 4, characterized in that The base is equipped with a limiting post and a position sensor on one side.

6. The slag cleaning device for an electric arc furnace according to claim 1, characterized by Also includes: A detachable connecting part and an iron removal disc are provided. The detachable connecting part is rotatably connected to the iron removal disc and is installed at the bottom of the connecting cylinder.

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