CN207760380U - Rotary open type electric arc furnace door - Google Patents

Abstract

The utility model provides a swing-type electric arc furnace door, which can be rotatably installed on the electric arc furnace. The swing-type electric arc furnace door includes a body and a driving device, and an oxygen lance is pierced on the body; the driving device is at least It includes a rotatable rotating shaft connected to the electric arc furnace and a driving member connected to the rotating shaft. The body is connected to the rotating shaft. The driving member can drive the rotating shaft to rotate along its own axis, and the rotation of the rotating shaft can drive the body to rotate around. The axis of the shaft rotates. The swing-type electric arc furnace door provided by the utility model can realize the oxygen blowing operation at the position of the electric arc furnace door even when the electric arc furnace door is closed by installing the oxygen lance on the body, which not only improves the production efficiency of the electric arc furnace, It also solves the problem that a large amount of cold air enters the electric arc furnace, causing local cold areas; the main body is driven to rotate through the driving device, so that the operation of driving the swing-type electric arc furnace door to open a certain angle, fully open or completely close is simple and convenient ,save time and energy.

Description

Swing type electric arc furnace door

technical field

The utility model relates to the technical field of electric arc furnace steelmaking, in particular to a swing-type electric arc furnace door.

Background technique

At present, the electric arc furnaces of domestic iron and steel enterprises are generally equipped with multifunctional oxygen lances on the furnace wall to realize the rapid input of auxiliary energy into the electric arc furnace and generate a certain stirring force on the electric arc furnace molten pool.

The current electric arc furnace door is a vertical lifting design, which is driven by pneumatic or hydraulic pressure. On the operating platform near the electric arc furnace door, some manufacturers are equipped with an external oxygen lance mechanism. When the oxygen blowing operation needs to be carried out at the position of the furnace door, the furnace door is raised to the open position, and the external oxygen lance can be extended into the furnace for oxygen blowing. This leads to the fact that the furnace door is always open when the oxygen blowing operation is performed at the furnace door position, causing a large amount of cold air to enter the electric arc furnace, reducing the temperature in the furnace, and finally leading to an increase in the electric arc furnace smelting power consumption. In addition, when the electric arc furnace is smelted with scrap steel, the furnace door will be blocked after the scrap steel is added into the electric arc furnace, and the external oxygen lance cannot enter the electric arc furnace to participate in blowing, thereby reducing the input of auxiliary energy A relatively cold zone is formed, causing unmelted steel scrap to remain near the furnace door.

Utility model content

The purpose of the utility model is to provide a swing-type electric arc furnace door which can avoid local cold areas.

In order to achieve the above purpose, the utility model provides a swing-type electric arc furnace door, which can be rotatably installed on the electric arc furnace. The swing-type electric arc furnace door includes: a body, on which there is Oxygen lance; driving device, the driving device at least includes a rotating shaft connected to the electric arc furnace and a driving member connected to the rotating shaft, the body is connected to the rotating shaft, and The driving member can drive the rotating shaft to rotate along its own axis, and the rotation of the rotating shaft can drive the body to rotate around the axis of the rotating shaft.

The swing-type electric arc furnace door as described above, wherein the driving device further includes a connecting arm, one end of the connecting arm is fixedly connected to the rotating shaft, the driving member is a driving cylinder, and the driving cylinder One end is provided with a telescopic driving rod, the other end of the connecting arm is pivotally connected to the end of the driving rod, the connecting arm and the driving rod have an included angle greater than 0° and less than 180°, The expansion and contraction of the driving rod can drive the connecting arm to rotate around the axis of the rotating shaft, and the rotation of the connecting arm can drive the rotating shaft to rotate along its own axis.

The swing-type electric arc furnace door described above, wherein, the other end of the driving cylinder is rotatably connected to the furnace shell of the electric arc furnace.

In the swing-type electric arc furnace door described above, the driving member is a driving motor, and the output shaft of the driving motor is connected to one end of the rotating shaft through a coupling.

The swing-type electric arc furnace door as described above, wherein, the swing-type electric arc furnace door further includes two rotating shaft supporting seats arranged on both sides of the body, and the rotating shaft supporting seats are connected to the On the furnace shell of the electric arc furnace, the rotating shaft is rotatably connected to the two rotating shaft supports.

The swing-type electric arc furnace door as described above, wherein, the rotating shaft is connected to the body through at least three connecting plates arranged at intervals.

The swing-type electric arc furnace door as described above, wherein the body is connected with an oxygen lance mounting seat, and the oxygen lance is connected to the oxygen lance mounting seat.

In the swing-type electric arc furnace door as described above, a mounting plate is connected to the body, and the oxygen lance mounting base is connected to the mounting plate.

In the swing-type electric arc furnace door as described above, a carbon powder spray gun is pierced through the body, and the carbon powder spray gun is spaced apart from the oxygen lance.

The swing-type electric arc furnace door as described above, wherein, the body is provided with a water-cooled coil, the water-cooled coil has a water inlet interface and a water return interface, and the water inlet interface and the return water interface The water connection is located on the same side of the body.

Compared with prior art, the utility model has the following advantages:

The swing-type electric arc furnace door provided by the utility model can realize the oxygen blowing operation at the position of the furnace door and input the auxiliary energy into the electric arc furnace by piercing the oxygen lance on the body. , which not only improves the production efficiency of the electric arc furnace, but also prevents a large amount of cold air from entering the electric arc furnace, solves the problem of local cold areas, and makes the distribution of the oxygen lance more uniform in the electric arc furnace, and is conducive to the stirring of the molten pool;

The swing-type electric arc furnace door provided by the utility model drives the body to rotate through the driving device, so that the operation of driving the swing-type electric arc furnace door to open a certain angle, fully open or completely close is simple and convenient, saving time and effort;

The swing-type electric arc furnace door provided by the utility model can control the oxygen flow, pressure and carbon powder flow through the valve station according to the electric arc furnace smelting process curve when the electric arc furnace is smelted by installing a carbon powder spray gun on the body. flow, pressure, etc., realize the combined use of oxygen gun and carbon powder gun to better create foam slag.

Description of drawings

The following drawings are only intended to illustrate and explain the utility model schematically, and do not limit the scope of the utility model. in:

Fig. 1 is the sectional structure schematic diagram of swing type electric arc furnace door of the present utility model;

Fig. 2 is a side view structural schematic diagram of the swing-type electric arc furnace door shown in Fig. 1;

Fig. 3 is a schematic diagram of the enlarged structure of part A in Fig. 2;

Fig. 4 is a schematic structural diagram of the working state of the driving cylinder and the connecting arm shown in Fig. 2 .

Explanation of reference numbers:

1. Body; 2. Oxygen lance; 3. Driving device; 31. Rotary shaft; 32. Drive cylinder; 321. Telescopic rod; 4. Connecting arm; 5. Rotary shaft support seat; 6. Connecting plate; 7. Oxygen lance Mounting base; 8. Mounting plate; 9. Water-cooled coil; 91. Water inlet port; 92. Return water port; S. Closed position of swing-type electric arc furnace door; O. Open position of swing-type electric arc furnace door; 10. Furnace shell.

Detailed ways

In order to have a clearer understanding of the technical scheme, purpose and effect of the utility model, the specific implementation of the utility model will now be described in conjunction with the accompanying drawings.

As shown in Figure 1 and Figure 2, the utility model provides a swing-type electric arc furnace door, which can be rotatably installed on the electric arc furnace, the swing-type electric arc furnace door includes a body 1 and a driving device 3, Oxygen lance 2 is pierced on the body 1, and the nozzle of oxygen lance 2 faces the inner center of the electric arc furnace so as to inject oxygen into the furnace. Holes and oxygen ring holes, so that the oxygen lance 3 can realize the burner function and the cluster oxygen flow function, and the external medium connection of the oxygen lance 2 includes the main oxygen pipeline, natural gas pipeline, epoxy gas pipeline, cleaning oxygen pipeline, cooling water inlet The water pipeline and the cooling water return pipeline, the flow rate and pressure of each pipeline are controlled by the medium valve station. The specific structure of the oxygen lance 2 is the existing technology, and the connection mode between each pipeline and the oxygen lance 2 is also the existing one. There is technology, so I won’t go into details here; the driving device 3 at least includes a rotatable rotating shaft 31 installed on the electric arc furnace, and a driving member connected to the rotating shaft 31. The body 1 is connected to the rotating shaft 31, and the body 1 It cannot rotate relative to the rotating shaft 31, and the driving member can drive the rotating shaft 31 to rotate along its own axis. Since the rotating shaft 31 and the body 1 have no relative rotation, the rotation of the rotating shaft 31 can drive the body 1 to rotate around the axis of the rotating shaft 31, thereby Driven by the drive device 3 , the main body 1 can be rotated to open at a certain angle, fully opened or fully closed.

When in use, after the preparation work of the electric arc furnace is completed, the main body 1 is driven by the driving device 3, so that the main body 1 is rotated and closed, that is, the swing-type electric arc furnace door is closed; scrap steel is added to the electric arc furnace, and the swing-type electric arc furnace door The oxygen lance 2 turns on the burner mode, and is used together with the oxygen lance on the furnace wall of the electric arc furnace to realize the cutting and melting of scrap steel; after the scrap steel is melted, the oxygen lance 2 on the door of the swing-type electric arc furnace is switched to the cluster oxygen lance mode , to enhance the stirring and decarburization of the molten steel pool near the furnace door; in the smelting process of the electric arc furnace, when the slag flow operation is required, the main body 1 is driven by the driving device 3 to rotate the main body 1 to a certain angle, that is, the swing type The electric arc furnace door is opened at a certain angle to realize the automatic outflow of the electric arc furnace slag. At the same time, since the swing type furnace door is not a fully opening device, it can prevent excess external cold air from entering the electric arc furnace, thus effectively solving the problem of cold air in the electric arc furnace. The position of the furnace door forms a relatively cold area, which causes the problem of unmelted steel scrap near the furnace door; when measuring the temperature and sampling before the electric arc furnace is tapped, the operator can fully open the swing-type electric arc furnace door through the driving device 3 If the furnace door slag accumulation is serious, the cleaning mode of the oxygen lance 2 pierced on the body 1 can be used to clean the furnace door slag accumulation.

It should be noted that when the opening angle of the swing-type electric arc furnace door is not greater than 15°, it will not affect the normal blowing of the oxygen lance 2 pierced on the body 1, but when the opening angle exceeds 15°, the body needs to be closed The oxygen lance 2 pierced on the 1 prevents the oxygen flow from blowing damage to the electric arc furnace refractory material.

The swing-type electric arc furnace door provided by the utility model, through the oxygen lance 2 pierced on the body 1, makes it possible to realize the oxygen blowing operation at the furnace door position even when the electric arc furnace door is closed, which avoids a large amount of cold air Entering the electric arc furnace, it solves the problem of the local cold zone, and makes the distribution of the oxygen lance 2 more uniform in the electric arc furnace, and is conducive to the stirring of the molten pool; the main body 1 is driven to rotate by the driving device 3, so that the drive is swiveled The operation of opening the electric arc furnace door at a certain angle, fully opening or completely closing is simple and convenient, saving time and effort.

In a preferred embodiment of the present utility model, as shown in Fig. 3 and Fig. 4, the drive device also includes a connecting arm 4, one end of which is welded on the rotating shaft 31 and located on one side of the body 1, so that Can not relatively rotate between connecting arm 4 and rotating shaft 31, and driving part is drive cylinder 32, and one end of driving cylinder 32 is provided with the drive rod that can stretch, and the other end of connecting arm 4 can rotate and joins with drive rod 321, with The axis of the rotating shaft 31 is not collinear with the centerline of the connecting arm 4. Preferably, the centerline of the connecting arm 4 is arranged perpendicular to the axis of the rotating arm 31, and the distance between the connecting arm 4 and the drive rod 321 is greater than 0° and less than 180°. ° to avoid the dead point when the drive rod 321 drives the connecting arm 4 to rotate. The expansion and contraction of the driving rod can drive the connecting arm 4 to rotate around the axis of the rotating shaft 31, because the connecting arm 4 and the rotating shaft 31 cannot rotate relative to each other. Therefore, the rotation of the connecting arm 4 can drive the rotation shaft 31 to rotate along its own axis, and the rotation of the rotation shaft 31 drives the body 1 connected to it to rotate around the axis of the rotation shaft 31, so that the body 1 can be driven by the drive cylinder 32. Rotate to open a certain angle, fully open or fully closed.

Specifically, the drive cylinder 32 may be a hydraulic cylinder or a pneumatic cylinder, and the drive cylinder 32 drives the body 1 to rotate, so that the opening angle of the body 1 can be precisely controlled, that is, the opening angle of the swing-type electric arc furnace door can be precisely controlled. Therefore, while avoiding the occurrence of local cold areas, the automatic flow out of the electric arc furnace slag is realized.

Furthermore, since the surrounding area is a high-temperature environment during electric arc furnace smelting, in order to ensure the service life of the rotating shaft 31 and the driving rod 32, the rotating shaft 31 and the hydraulic cylinder are cooled by cooling water to ensure that the mechanical parts can work and run at a reasonable temperature. The service life of the rotating shaft 31 and the hydraulic cylinder is guaranteed.

Further, as shown in Figure 2, the other end of the drive cylinder 32 is rotatably connected to the furnace shell 10 of the electric arc furnace, that is, the drive cylinder 32 is installed on the furnace shell 10 of the electric arc furnace, so that it can be used without setting other supporting structures. The height of the drive cylinder 32 meets the requirements of use, and makes the overall structure of the swing-type electric arc furnace door relatively simple. Preferably, the center line of the drive rod is set perpendicular to the axis of the rotating shaft 31, that is, the center line of the telescopic rod 321 is perpendicular to Axis of the rotating shaft 31 .

In another embodiment of the present utility model, the driving member is a driving motor (not shown in the figure), and the output shaft of the driving motor is connected to one end of the rotating shaft 31 through a coupling, and the output shaft of the driving motor drives The rotating shaft 31 rotates synchronously, and the rotation of the rotating shaft 31 drives the body 1 connected to it to rotate around the axis of the rotating shaft 31, so that the body 1 can be rotated to open a certain angle, fully opened or completely closed under the drive of the drive motor, and the drive The motor can also precisely control the opening angle of the swing-type electric arc furnace door, so as to avoid the occurrence of local cold spots and realize the automatic flow out of the electric arc furnace slag.

In one embodiment of the present utility model, as shown in Figure 2, the swing-type electric arc furnace door also includes two rotating shaft support seats 5 arranged on both sides of the body 1, and the lower ends of the rotating shaft support seats 5 are fixedly connected to each other. On the furnace shell 10 of the electric arc furnace, the rotating shaft 31 is rotatably connected to the upper ends of the supports of the two rotating shafts 31, that is, the rotating shaft 31 is connected directly above the body 1. At this time, the driving cylinder 32 is located below the rotating shaft 31 , the two rotating shaft support seats 5 bear the weight of the entire swing-type electric arc furnace door, and the rotating shaft 31 is supported by the two rotating shaft supporting seats 5, so that the connection between the rotating shaft 31 and the furnace shell 10 is simple and convenient.

Further, as shown in Figures 1 and 2, the rotating shaft 31 is connected to the main body 1 through at least three connecting plates 6 arranged at intervals, and the connecting plates 6 can play a role in strengthening the connection strength between the rotating shaft 31 and the main body 1, thereby Make the connection between the rotating shaft 31 and the body 1 more reliable. In order to strengthen the use strength of the connecting plate 6, a plurality of reinforcing ribs can be arranged on the connecting plate 6, and the strength of the connecting plate 6 can be increased through the reinforcing ribs to ensure that the connecting plate 6 The strength meets the force requirements.

In one embodiment of the present utility model, as shown in Figure 1 and Figure 2, the surface of the body 1 facing away from the inside of the furnace body is connected with an oxygen lance mounting seat 7, and the oxygen lance 2 is connected to the oxygen lance mounting seat 7, The oxygen lance mount 7 can limit the inclination direction of the oxygen lance 2 and fix the oxygen lance 2 on the body 1, so that the nozzle of the oxygen lance 2 faces toward the inner center of the furnace body.

Further, as shown in Figure 1 and Figure 2, the body 1 is connected with a mounting plate 8 on the surface facing away from the inside of the furnace body, and the oxygen lance mount 7 is connected on the mounting plate 8, and the mounting plate 8 is a 10mm thick steel plate to meet Oxygen lance mounting seat 7 is required for the strength of body 1 during installation. The steel plate is welded on the body 1 so that the outer surface of the furnace door is smooth. There are some bolt holes on the steel plate. Oxygen lance mounting seat 7 is fixed on the steel plate by bolts.

In one embodiment of the present utility model, a carbon powder spray gun (not shown in the figure) is also pierced on the body 1, and the carbon powder spray gun and the oxygen lance 2 are arranged at intervals, and the nozzle of the carbon powder spray gun is also toward the inner center of the furnace body. , the specific structure of the carbon powder spray gun is the prior art, and the installation method is the same as that of the oxygen lance, so no more details here, the distance between the carbon powder spray gun and the oxygen lance 2 is preferably 300mm, and the carbon powder spray gun and the oxygen lance 2 The included angle between the oxygen lances 2 is preferably 5°. During electric arc furnace smelting, according to the electric arc furnace smelting process curve, the flow and pressure of oxygen and the flow and pressure of carbon powder are controlled through the valve station to realize the oxygen lance 2 and carbon powder. The gun is used together to better create foam slag.

In one embodiment of the present utility model, as shown in Fig. 1 and Fig. 2, a water-cooling coil 9 is provided on the surface of the body 1 facing the interior of the furnace body, and the water-cooling coil 9 is a one-way pipe. A through hole for the oxygen lance 2 is left, and the water-cooled coil 9 has a water inlet 91 and a return water 92, and the water inlet 91 and the return water 92 are located on the same side of the body 1, thus increasing the The length of the water-cooling coil 9 improves the cooling efficiency of the water-cooling coil 9 .

The assembly and use process of the swing-type electric arc furnace door provided by the utility model will be described in detail below in conjunction with the accompanying drawings:

When installing, as shown in Figure 1 and Figure 2, the water-cooled coil 9 is first arranged on the surface of the body 1 facing the inside of the furnace body, and a through hole for the oxygen lance 2 to pass through is reserved. A 10mm steel plate is welded on the surface of the tube 9 facing away from the inside of the furnace body, and several bolt holes are opened on the steel plate. Open a hole, and fix it on the oxygen lance mounting seat 7 through a pin shaft, then connect the body 1 with the oxygen lance 2 to the rotating shaft 31 through the connecting plate 6, and install the rotating shaft 31 on the two rotating shafts rotatably The upper end of the support seat 5, the two rotating shaft support seats 5 bear the weight of the entire swing-type electric arc furnace door, the lower ends of the two rotating shaft support seats 5 are fixed on the furnace shell 20, and finally, the rotatable connection is The telescopic rod 321 of the hydraulic cylinder is rotatably connected to the connecting arm 4 of the rotating shaft 31, so that the main body 1 can be rotated and opened at a certain angle, fully opened or completely closed under the drive of the hydraulic cylinder.

In addition, a carbon powder spray gun (not shown) can also be pierced on the body 1, and the water-cooled coil 9 is reserved for a through hole for the carbon powder spray gun to pass through, and the nozzle of the carbon powder spray gun also faces the furnace body In the inner center, the distance between the carbon powder spray gun and the oxygen lance 2 is preferably 300mm, and the angle between the carbon powder spray gun and the oxygen lance 2 is preferably 5°. During electric arc furnace smelting, according to the electric arc furnace smelting process curve, through the valve The station controls the flow and pressure of oxygen and the flow and pressure of carbon powder, so as to realize the coordinated use of oxygen gun 2 and carbon powder gun to better create foam slag.

When in use, after the preparation work of the electric arc furnace is completed, the main body 1 is driven by the hydraulic cylinder, so that the main body 1 is rotated and closed, that is, the swing-type electric arc furnace door is closed, as shown in the position shown by S in Figure 1 and Figure 4; scrap steel is added to the electric arc Furnace, the oxygen lance 2 on the swing-type electric arc furnace door opens the burner mode, and is used in conjunction with the oxygen lance on the furnace wall of the electric arc furnace to realize cutting and melting of scrap steel; after the scrap steel is melted, the swing-type furnace door The oxygen lance 2 is switched to the cluster oxygen lance mode to enhance the stirring and decarburization of the molten steel pool near the furnace door; during the smelting process of the electric arc furnace, when the slag flow operation is required, the main body 1 is driven by the driving device 3 to make the main body 1 Rotate and open at a certain angle, that is, the swing-type electric arc furnace door opens at a certain angle to realize the automatic flow out of the electric arc furnace slag. At the same time, because the swing-type furnace door is not a fully opening device, it can prevent excess external cold air from entering the electric arc furnace chamber This effectively solves the problem that the cold air forms a relatively cold area at the furnace door, causing unmelted scrap steel to remain near the furnace door; when measuring the temperature and sampling the electric arc furnace before tapping, the operator can use the driving device 3 to The swing-type furnace door is fully opened, as shown by O in Figure 1 and Figure 4; if the furnace door has serious slag accumulation, the cleaning mode of the oxygen lance 2 pierced on the body 1 can be used to clean the furnace door slag accumulation.

In summary, the swing-type electric arc furnace door provided by the utility model can realize the oxygen blowing operation at the position of the furnace door even when the electric arc furnace door is closed by installing the oxygen lance on the body, and the auxiliary energy Input into the electric arc furnace, which not only improves the production efficiency of the electric arc furnace, but also prevents a large amount of cold air from entering the electric arc furnace, solves the problem of local cold areas, and makes the distribution of oxygen lances in the electric arc furnace more uniform and effective. Conducive to molten pool stirring;

The swing-type electric arc furnace door provided by the utility model drives the body to rotate through the driving device, so that the operation of driving the swing-type electric arc furnace door to open a certain angle, fully open or completely close is simple and convenient, saving time and effort;

The swing-type electric arc furnace door provided by the utility model can control the oxygen flow, pressure and carbon powder flow through the valve station according to the electric arc furnace smelting process curve when the electric arc furnace is smelted by installing a carbon powder spray gun on the body. flow, pressure, etc., realize the combined use of oxygen gun and carbon powder gun to better create foam slag.

The above descriptions are only illustrative specific implementations of the present utility model, and are not intended to limit the scope of the present utility model. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of the present invention shall fall within the protection scope of the present invention. And it should be noted that each component of the utility model is not limited to the above-mentioned overall application, and each technical feature described in the specification of the utility model can be selected to be used alone or in combination according to actual needs. Therefore, The utility model naturally covers other combinations and specific applications related to the invention point of the case.

Claims (10)

1. A swing-type electric arc furnace door, which can be rotatably installed on the electric arc furnace, is characterized in that, the swing-type electric arc furnace door comprises: a body, the body is pierced with an oxygen lance; A driving device, the driving device at least includes a rotatable rotating shaft connected to the electric arc furnace, and a driving member connected to the rotating shaft, the body is connected to the rotating shaft, and the driving member The rotating shaft can be driven to rotate along its own axis, and the rotation of the rotating shaft can drive the body to rotate around the axis of the rotating shaft. 2. The swing type electric arc furnace door according to claim 1, characterized in that, The driving device also includes a connecting arm, one end of the connecting arm is fixedly connected to the rotating shaft, the driving member is a driving cylinder, and one end of the driving cylinder is provided with a telescopic driving rod, and the connecting arm is The other end is pivotally connected to the end of the driving rod, the connecting arm and the driving rod have an included angle greater than 0° and less than 180°, the expansion and contraction of the driving rod can drive the connecting arm around the The axis of the rotating shaft rotates, and the rotation of the connecting arm can drive the rotating shaft to rotate along its own axis. 3. The swing-type electric arc furnace door according to claim 2, characterized in that, The other end of the drive cylinder is rotatably connected to the furnace shell of the electric arc furnace. 4. The swing-type electric arc furnace door according to claim 1, characterized in that, The driving member is a driving motor, and the output shaft of the driving motor is connected to one end of the rotating shaft through a coupling. 5. The swing type electric arc furnace door according to claim 1, characterized in that, The swing-type electric arc furnace door also includes two rotating shaft support seats arranged on both sides of the body, the rotating shaft support seats are connected to the furnace shell of the electric arc furnace, and the rotating shaft can rotate It is connected to the two rotating shaft supports. 6. The swing type electric arc furnace door according to claim 5, characterized in that, The rotating shaft is connected to the body through at least three connecting plates arranged at intervals. 7. The swing type electric arc furnace door according to claim 1, characterized in that, An oxygen lance mount is connected to the body, and the oxygen lance is connected to the oxygen lance mount. 8. The swing type electric arc furnace door according to claim 7, characterized in that, A mounting plate is connected to the body, and the oxygen lance mounting base is connected to the mounting plate. 9. The swing-type electric arc furnace door according to any one of claims 1 to 8, characterized in that, A carbon powder spray gun is also pierced on the body, and the carbon powder spray gun is spaced apart from the oxygen gun. 10. The swing-type electric arc furnace door according to any one of claims 1 to 8, characterized in that, The body is provided with a water cooling coil, the water cooling coil has a water inlet port and a water return port, and the water inlet port and the water return port are located on the same side of the body.