An automatic stirring device for electric arc furnace used in corundum brick production

Abstract

The present application discloses an automatic stirring device for an electric arc furnace used for producing corundum bricks, which relates to the technical field of auxiliary devices for electric arc furnace production; it comprises a furnace shell, a furnace lining and a furnace bottom, with a through hole opened at the center of the furnace bottom; it also comprises a stirring assembly and a power assembly; the stirring assembly can be movably connected to the through hole of the furnace bottom; the stirring assembly comprises a stirring shaft, a cooling pipe and a rotation angle; the stirring shaft is a cylindrical multi-layer tube, the side of which can be movably connected to the through hole of the furnace bottom; the cooling pipe is connected to the stirring shaft, and is used to transport and extract coolant into the stirring shaft; the rotation angle is a conical hole set at the through hole of the furnace bottom; the power assembly comprises a track and an electromagnet, and makes it rise and fall or rotate in the electric arc furnace; the track is a plurality of groups of tracks surrounding the furnace shell, and the electromagnet can be movably connected to the track; it is achieved that the stirring tool does not react with the molten material, and at the same time the stirring effect on the bottom of the electric arc furnace is better, thereby improving the technical effect of improving the yield of electric-melted α alumina bricks.

Description

Technical Field

[0001] The invention relates to the technical field of electric arc furnace production auxiliary devices, in particular to an electric arc furnace automatic stirring device for producing corundum bricks. Background Art

[0002] Fused α alumina bricks are refractory materials formed by melting alumina powder in an electric furnace and then injecting it into a mold for cooling. They have the characteristics of high technical content, great manufacturing difficulty, complex process and low yield. The current production process mainly adopts the electric arc furnace melting method.

[0003] The raw materials of fused α alumina bricks need to be stirred when they are melted in an electric arc furnace to evenly increase the temperature throughout the furnace, which is conducive to rapid melting and mixing of the raw materials. The traditional stirring method uses workers to insert iron stirring tools into the furnace for manual stirring. Since the iron stirring tools and the materials adhered to them are in direct contact with the molten material, reactions will occur in the molten material, affecting the quality of the finished product. At the same time, due to the limitations of the stirring port and stirring tools, the stirring area is small, the stirring is uneven, and the bottom stirring effect is poor, which in turn affects the yield of fused α alumina bricks. Summary of the Invention

[0004] The present invention provides an automatic stirring device for an electric arc furnace used in the production of corundum bricks, thereby solving the technical problems that a stirring tool easily reacts with molten material and affects the quality of the finished product, and at the same time, due to the limitations of a stirring port and a stirring tool, the stirring effect on the bottom of the electric arc furnace is poor, thereby affecting the yield of electric-melted α-alumina bricks. The present invention achieves the technical effect that the stirring tool does not react with the molten material and at the same time the stirring effect on the bottom of the electric arc furnace is good, thereby improving the yield of electric-melted α-alumina bricks.

[0005] The present invention provides an automatic stirring device for an electric arc furnace used for producing corundum bricks, comprising a furnace shell, a furnace lining and a furnace bottom, wherein a through hole is opened at the center of the furnace bottom;

[0006] Also includes a stirring component and a power component;

[0007] The stirring assembly can be movably connected to the through hole at the furnace bottom and is used to stir the molten material inside the electric arc furnace;

[0008] The stirring assembly includes a stirring shaft, a cooling tube and a rotation angle;

[0009] The stirring shaft is a cylindrical multi-layer tube, the side of which can be movably connected to the through hole at the bottom of the furnace;

[0010] The cooling pipe is connected to the bottom of the stirring shaft and is used to transport and extract cooling liquid into the stirring shaft to reduce its temperature;

[0011] The rotation angle is a tapered hole provided at the furnace bottom through hole, with the bottom surface of the tapered hole facing the furnace cover, which is used to rotate the stirring shaft inside the electric arc furnace to increase the stirring area;

[0012] The power assembly includes a track and an electromagnet, which is used to provide suction to the stirring assembly and enable it to rise, fall and rotate in the electric arc furnace;

[0013] The rails are multiple groups of rails that surround the furnace shell, and the rails are movably connected to the electromagnets.

[0014] Furthermore, the stirring shaft comprises a refractory material and a metal tube;

[0015] The refractory material is arranged at the outermost side of the stirring shaft, and a metal tube is arranged inside to block the high temperature in the electric arc furnace; the inner surface of the refractory material is in contact with the outer surface of the metal tube, and a coolant is arranged inside the metal tube for cooling.

[0016] Furthermore, the cooling pipe is wrapped with refractory material on the outside, and the circumference of the cooling pipe wrapped with refractory material is equal to the circumference of the stirring shaft. The cooling pipe includes a water inlet pipe and a drain pipe, and the water inlet pipe and the drain pipe are respectively occupied by half of the area inside the cooling pipe through a partition arranged inside the cooling pipe.

[0017] Furthermore, the cooling tube and the metal tube are cast into a whole through the externally wrapped refractory material.

[0018] Furthermore, the material of the refractory material is the same as that of the molten material, thereby avoiding changing the material properties of the molten material.

[0019] Furthermore, the track includes a circular track and a vertical track;

[0020] The annular tracks are multiple sets of circular tracks fixed on the outer surface of the furnace shell, the top of the annular tracks is flush with the middle of the furnace shell, and the bottom is flush with the bottom of the furnace shell;

[0021] The vertical track is a linear track fixed on the outer surface of the furnace shell. The top and bottom of the vertical track are respectively connected to the top and bottom of the circular track, and the vertical track and the circular track intersect with each other.

[0022] Furthermore, the power of the electromagnet is adjustable, and the stirring range of the stirring shaft in the electric arc furnace can be adjusted.

[0023] Furthermore, the stirring assembly also includes stirring blades, which are multiple fan-shaped bodies evenly distributed on the top of the stirring shaft.

[0024] Furthermore, the stirring assembly further comprises a stirring head, which is an ellipsoid fixedly connected to the top of the cooling tube, and the stirring head comprises a metal shell;

[0025] The metal shell is an ellipsoidal metal shell that can be adsorbed by an electromagnet. The outside of the metal shell is wrapped with refractory material, and the bottom is connected to a cooling pipe. The cooling liquid transported by the cooling pipe can circulate inside the metal shell.

[0026] Furthermore, there is a gap between the metal shell and the cooling tube and the refractory material, and the stirring head further includes a sealing ring, an air pressure sensor and a temperature sensor;

[0027] The sealing ring is fixed at the connection between the gap and the refractory material and the bottom of the cooling pipe. The air pressure sensor and temperature sensor are respectively connected to the gap and measure the air pressure and temperature in the gap. When the air pressure and temperature in the gap are abnormal, an alarm is issued.

[0028] One or more technical solutions provided in the present invention have at least the following technical effects or advantages:

[0029] An automatic stirring device for an electric arc furnace used for producing corundum bricks is provided, the automatic stirring device comprising a stirring assembly and a power assembly, the stirring assembly being movably connected at the center of the furnace bottom and comprising a stirring shaft, a cooling tube and a rotation angle, the stirring shaft being a cylindrical multi-layer tube internally connected to a cooling tube for conveying coolant, the rotation angle being a tapered hole arranged at a through hole at the furnace bottom, for rotating the stirring shaft inside the electric arc furnace; the power assembly comprising a track surrounding the furnace shell and an electromagnet attached to the track, the electromagnet providing suction to the stirring assembly through its own magnetic force, and causing the stirring assembly to rise and fall and rotate inside the furnace shell by moving on the track; the technical problem that the stirring tool easily reacts with the molten material and affects the quality of the finished product, and the stirring effect on the bottom of the electric arc furnace is poor due to the limitation of the stirring port and the stirring tool, thereby affecting the yield of the electric-melted α-alumina bricks is solved; the technical effect that the stirring tool does not react with the molten material and the stirring effect on the bottom of the electric arc furnace is good, thereby improving the yield of the electric-melted α-alumina bricks is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 This is a schematic structural diagram of the stirring assembly of the present invention;

[0032] Figure 3 Schematic diagram of the track structure of the present invention;

[0033] Figure 4 This is a schematic diagram of the motion state of the stirring assembly of the present invention;

[0034] Figure 5 A schematic diagram of the movement route of the stirring component of the present invention;

[0035] Figure 6 This is a schematic diagram of the overall structure of the stirring assembly of the present invention equipped with stirring blades;

[0036] Figure 7 A top view of the stirring blade of the present invention;

[0037] Figure 8 This is a schematic diagram of the overall structure of the stirring assembly of the present invention equipped with a stirring head;

[0038] Figure 9 Schematic diagram of the structure of the stirring head of the present invention;

[0039] Figure 10 This is a schematic diagram of sensor detection of the present invention.

[0040] Reference numerals:

[0041] Furnace shell 100, furnace lining 110, furnace bottom 120,

[0042] Stirring assembly 200, stirring shaft 210, refractory material 211, metal pipe 212, cooling pipe 220, water inlet pipe 221, drain pipe 222, rotation angle 230, stirring blade 240,

[0043] Stirring head 250, metal shell 251,

[0044] Power assembly 300, track 310, circular track 311, vertical track 312, electromagnet 320,

[0045] Gap 400 , sealing ring 410 , air pressure sensor 420 , and temperature sensor 430 . DETAILED DESCRIPTION

[0046] To facilitate understanding of the present invention, the present application will be described more comprehensively below with reference to the relevant drawings; the drawings show preferred embodiments of the present invention, but the present invention can be implemented in many different forms and is not limited to the embodiments described herein; on the contrary, the purpose of providing these embodiments is to enable a more thorough and comprehensive understanding of the disclosed content of the present invention.

[0047] It should be noted that the terms “vertical”, “horizontal”, “up”, “down”, “left”, “right” and similar expressions used in this document are for illustrative purposes only and do not represent the only implementation method.

[0048] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains; the terms used herein in the specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention; the term "and / or" used herein includes any and all combinations of one or more of the associated listed items.

[0049] See also Figure 1 , is a schematic diagram of the overall structure of the present invention, which provides an electric arc furnace automatic stirring device for corundum brick production, including a stirring component 200 and a power component 300. The stirring component 200 can be movably connected to the center of the furnace bottom 120, including a stirring shaft 210, a cooling pipe 220 and a rotation angle 230. The stirring shaft 210 is a cylindrical multi-layer tube, internally connected to the cooling pipe 220 for conveying coolant, and the rotation angle 230 is a tapered hole set at the through hole of the furnace bottom 120, used to rotate the stirring shaft 210 inside the electric arc furnace; the power component 300 includes a track 310 and a The electromagnet 320 is attached to the track 310, and the electromagnet 320 provides suction to the stirring assembly 200 through its own magnetic force, and enables the stirring assembly 200 to rise and fall and rotate in the furnace shell 100 by moving on the track 310; it solves the technical problem that the stirring tool easily reacts with the molten material and affects the quality of the finished product, and at the same time, due to the limitations of the stirring port and the stirring tool, the stirring effect on the bottom of the electric arc furnace is poor, thereby affecting the yield of the electric-melted α-alumina bricks; it achieves the technical effect that the stirring tool does not react with the molten material, and at the same time, the stirring effect on the bottom of the electric arc furnace is good, thereby improving the yield of the electric-melted α-alumina bricks.

[0050] Example 1

[0051] like Figures 1 to 5 As shown, the automatic stirring device of an electric arc furnace for producing corundum bricks of the present application includes a furnace shell 100, a furnace lining 110 and a furnace bottom 120, wherein a through hole is opened at the center of the furnace bottom 120;

[0052] It also includes a stirring assembly 200 and a power assembly 300;

[0053] The stirring assembly 200 can be movably connected to the through hole of the furnace bottom 120 to stir the molten material inside the electric arc furnace;

[0054] The stirring assembly 200 includes a stirring shaft 210, a cooling tube 220 and a rotation angle 230;

[0055] The stirring shaft 210 is a cylindrical multi-layer tube, the side of which is movably connected to the through hole of the furnace bottom 120. It includes a refractory material 211 and a metal tube 212. The refractory material 211 is arranged on the outermost side of the stirring shaft 210, and the metal tube 212 is inside to block the high temperature in the electric arc furnace. The inner surface of the refractory material 211 is in contact with the outer surface of the metal tube 212, and the metal tube 212 contains a coolant for cooling.

[0056] The cooling pipe 220 is connected to the bottom of the stirring shaft 210 and is wrapped with a refractory material 211. The circumference of the cooling pipe 220 wrapped with the refractory material 211 is equal to the circumference of the stirring shaft 210. The cooling pipe 220 is used to transport and extract coolant into the stirring shaft 210 to cool it down.

[0057] The cooling pipe 220 includes a water inlet pipe 221 and a drainage pipe 222 . The water inlet pipe 221 and the drainage pipe 222 each occupy half of the area inside the cooling pipe 220 through a partition disposed inside the cooling pipe 220 .

[0058] Furthermore, the cooling tube 220 and the metal tube 212 are cast into a whole through the externally wrapped refractory material 211 to better block the external temperature.

[0059] Furthermore, the material of the refractory material 211 is the same as that of the molten material, so as to avoid changing the material properties of the molten material;

[0060] The rotation angle 230 is a tapered hole provided at the through hole of the furnace bottom 120 , with the bottom surface of the tapered hole facing the furnace cover, and is used to rotate the stirring shaft 210 inside the electric arc furnace to increase the stirring area.

[0061] Furthermore, the rotation angle 230 is in a range of 45 to 60 degrees.

[0062] The power assembly 300 includes a track 310 and an electromagnet 320, which is used to provide suction to the stirring assembly 200 and enable it to rise, fall and rotate in the electric arc furnace;

[0063] The track 310 is a plurality of tracks surrounding the furnace shell 100, including a circular track 311 and a vertical track 312. The track 310 is movably connected to the electromagnet 320.

[0064] The annular track 311 is a plurality of circular tracks fixed to the outer surface of the furnace shell 100. The top of the annular track 311 is flush with the middle of the furnace shell 100, and the bottom is flush with the bottom of the furnace shell 100, and is used to rotate the electromagnet 320 around the outer surface of the furnace shell 100.

[0065] The vertical track 312 is a straight track fixed to the outer surface of the furnace shell 100. The top and bottom of the vertical track 312 are respectively connected to the top and bottom of the circular track 11. The vertical track 312 and the circular track 311 intersect with each other, and are used to enable the electromagnet 320 to adjust its position on the circular track 311 according to the height of the electrode in the electric arc furnace.

[0066] Furthermore, the power of the electromagnet 320 is adjustable, and the stirring range of the stirring shaft 210 in the electric arc furnace can be adjusted.

[0067] Further, such as Figures 6 and 7 As shown, in order to further improve the stirring effect of the stirring assembly 200, stirring blades 240 are added to the stirring shaft 210. The stirring blades 240 are multiple fan-shaped bodies evenly distributed on the top of the stirring shaft 210, which are used to increase the stirring area of ​​the stirring assembly 200 in the electric arc furnace.

[0068] The working process of the electric arc furnace automatic stirring device for corundum brick production in the embodiment of the present application is as follows:

[0069] 1. The initial position of the stirring assembly 200 is at the rotation angle 230, and the initial position of the electromagnet 320 is on the annular track 311 at the same horizontal position as the top of the stirring assembly 200;

[0070] As the molten material level in the electric arc furnace rises, the electrode gradually rises. At the same time, the electromagnet 320 is energized, generating suction on the metal tube 212 in the stirring shaft 210. Driven by the power assembly 300, the stirring shaft 210 gradually rises. The top of the stirring shaft 210 maintains an appropriate distance from the bottom of the electrode to prevent collision.

[0071] 2. The electromagnet 320 rotates on the annular track 311, driving the stirring shaft 210 to rotate, thereby stirring the molten material in the electric arc furnace. By changing the magnetic force of the electromagnet 320, the stirring position of the stirring shaft 210 in the electric arc furnace can be changed. As the magnetic force of the electromagnet 320 increases, the stirring area of ​​the stirring shaft 210 in the electric arc furnace also increases accordingly.

[0072] 3. After the melting and casting is completed, the electromagnet 320 moves to the opposite direction, pulling the stirring shaft 210 back to the middle position, and at the same time driving the stirring shaft 210 down to the initial position.

[0073] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages:

[0074] The invention solves the technical problem that the stirring tool easily reacts with the molten material and affects the quality of the finished product, and at the same time, the stirring effect on the bottom of the electric arc furnace is poor due to the limitation of the stirring port and the stirring tool, thereby affecting the yield of the electric-melted α-alumina bricks; the invention realizes that the stirring tool does not react with the molten material and at the same time the stirring effect on the bottom of the electric arc furnace is good, thereby improving the technical effect of the finished product rate of the electric-melted α-alumina bricks.

[0075] Example 2

[0076] During the test of the above embodiment, the following problems were found: the cooling area in the stirring shaft 210 is small, the cooling speed is slow, and the cooling effect is not ideal; in addition, when the raw materials in the electric arc furnace are not pre-crushed in place and the raw material particles are large, the stirring area size and stirring effect of the stirring assembly 200 need to be further enhanced.

[0077] In response to the above problems, Figures 8 and 9 As shown, this embodiment adds a stirring head 250 on the basis of the above embodiment;

[0078] The stirring head 250 is an ellipsoid fixedly connected to the top of the cooling tube 220, and is used to increase the stirring area of ​​the stirring assembly 200 in the electric arc furnace. The stirring head 250 includes a metal shell 251;

[0079] The metal shell 251 is an ellipsoidal metal shell that can be attracted by the electromagnet 320. The metal shell 251 is wrapped with a refractory material 211 on the outside and connected to the cooling pipe 220 on the bottom. The cooling liquid transported by the cooling pipe 220 can circulate inside the metal shell 251. The capacity of the cooling liquid in the metal shell 251 is increased, thereby enhancing the cooling effect.

[0080] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages:

[0081] The invention solves the technical problem that the cooling effect of the stirring component 200 is poor, and the size of the stirring area and the stirring effect of the stirring component 200 need to be further enhanced when the raw materials in the electric arc furnace are not pre-crushed and the raw materials particles are large; the invention realizes the enhancement of the cooling effect of the stirring component 200, and the enhancement of the technical effect of the size of the stirring area and the stirring effect of the stirring component 200 when the raw materials in the electric arc furnace are not pre-crushed and the raw materials particles are large.

[0082] Example 3

[0083] During the test process of the above embodiment, the following problems were found: during the use of the stirring head 250, the refractory material 211 will be gradually corroded due to the high temperature in the furnace. The corrosion will cause the thermal insulation effect of the refractory material 211 to deteriorate, and then cause the metal shell 251 to melt. Because the stirring head 250 is built into the electric arc furnace, it is inconvenient to observe the corrosion situation during operation. Therefore, the embodiment of the present application improves the structure and production process of the stirring head 250 on the basis of the above embodiment, so that it has a detection and alarm effect.

[0084] In response to the above problems, Figure 10 As shown, this embodiment improves the structure and production process of the stirring head 250 on the basis of the above embodiment;

[0085] When the stirring head 250 is processed, the metal shell 251 and the refractory material 211 are produced by integral casting. First, the combination of the metal shell 251 and the cooling tube 220 is preheated to 1000 degrees, and then placed into a mold after being expanded by the heat. Then, the refractory material 211 is placed into the mold to wrap the metal shell 251.

[0086] Then, cold air is slowly delivered to the interior of the metal shell 251 and the cooling tube 220 through the cooling tube 220, causing the metal shell 251 and the cooling tube 220 to shrink, thereby creating a gap 400 between the formed metal shell 251 and the cooling tube 220 and the refractory material 211.

[0087] The stirring head 250 after production also includes a sealing ring 410, an air pressure sensor 420 and a temperature sensor 430;

[0088] The sealing ring 410 is fixed at the connection between the gap 400 and the refractory material 211 and the bottom of the cooling tube 220 to seal the gap 400. The air pressure sensor 420 and the temperature sensor 430 are respectively connected to the gap 400 and measure the air pressure and temperature in the gap 400. When the air pressure and temperature in the gap 400 are abnormal, an alarm is issued to remind the staff.

[0089] The usage process of this embodiment is as follows:

[0090] When the electric arc furnace is working, by inflating air into the gap 400, when the air pressure sensor 420 detects a decrease in air pressure, it indicates that there is an air leakage; the temperature in the gap 400 is detected by the temperature sensor 430. When an abnormal increase in temperature is detected, it indicates that the refractory material 211 is severely worn; by detecting the air pressure and temperature of the gap 400, the staff can be reminded in time to avoid work problems.

[0091] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages:

[0092] The technical problem that the damage of the refractory material 211 on the outer surface of the stirring head 250 cannot be observed during the working process is solved, and the technical effect of automatically detecting the damage of the refractory material 211 is achieved.

[0093] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An automatic stirring device for an electric arc furnace used for producing corundum bricks, comprising a furnace shell (100), a furnace lining (110) and a furnace bottom (120), wherein a through hole is opened at the center of the furnace bottom (120); It is characterized by: Also included are a stirring assembly (200) and a power assembly (300); The stirring assembly (200) can be movably connected to the through hole of the furnace bottom (120) and is used to stir the molten material inside the electric arc furnace; The stirring assembly (200) includes a stirring shaft (210), a cooling tube (220) and a rotation angle (230); The stirring shaft (210) is a cylindrical multi-layer tube, the side of which can be movably connected to the through hole of the furnace bottom (120); The cooling pipe (220) is connected to the bottom of the stirring shaft (210) and is used to transport and extract cooling liquid into the stirring shaft (210) to reduce its temperature; The rotation angle (230) is a tapered hole provided at the through hole of the furnace bottom (120), with the bottom surface of the tapered hole facing the furnace cover, and is used to rotate the stirring shaft (210) inside the electric arc furnace to increase the stirring area; The power assembly (300) includes a track (310) and an electromagnet (320), which is used to provide suction to the stirring assembly (200) and enable it to rise, fall and rotate in the electric arc furnace; The tracks (310) are multiple sets of tracks that surround the furnace shell (100), and the tracks (310) are movably connected to the electromagnets (320); The stirring shaft (210) includes a refractory material (211) and a metal tube (212); The refractory material (211) is arranged at the outermost side of the stirring shaft (210), and has a metal tube (212) inside for blocking the high temperature in the electric arc furnace; the inner surface of the refractory material (211) is in contact with the outer surface of the metal tube (212), and the metal tube (212) has a cooling liquid inside for cooling; The track (310) includes a circular track (311) and a vertical track (312); The annular tracks (311) are multiple sets of circular tracks fixed on the outer surface of the furnace shell (100), and the top of the annular tracks (311) is flush with the middle of the furnace shell (100), and the bottom is flush with the bottom of the furnace shell (100); The vertical track (312) is a linear track fixed on the outer surface of the furnace shell (100), the top and bottom of the vertical track (312) are respectively connected to the top and bottom of the circular track (311), and the vertical track (312) and the circular track (311) intersect each other; The power of the electromagnet (320) is adjustable, and the stirring range of the stirring shaft (210) in the electric arc furnace can be adjusted.

2. The automatic stirring device for an electric arc furnace used for producing corundum bricks according to claim 1, characterized in that: The cooling pipe (220) is externally wrapped with a refractory material (211), and the circumference of the cooling pipe (220) externally wrapped with the refractory material (211) is equal to the circumference of the stirring shaft (210). The cooling pipe (220) includes a water inlet pipe (221) and a drainage pipe (222). The water inlet pipe (221) and the drainage pipe (222) are connected through a partition plate provided inside the cooling pipe (220), and each occupies half of the area inside the cooling pipe (220).

3. The automatic stirring device for an electric arc furnace used for producing corundum bricks according to claim 2, characterized in that: The cooling tube (220) and the metal tube (212) are cast into a whole through the externally wrapped refractory material (211).

4. The automatic stirring device for an electric arc furnace used for producing corundum bricks according to claim 1, characterized in that: The material of the refractory material (211) is the same as that of the molten material, thereby avoiding changing the material properties of the molten material.

5. The automatic stirring device for an electric arc furnace used for producing corundum bricks according to claim 1, characterized in that: The stirring assembly (200) further comprises stirring blades (240), wherein the stirring blades (240) are a plurality of fan-shaped bodies evenly distributed on the top of the stirring shaft (210).

6. The automatic stirring device for an electric arc furnace used for producing corundum bricks according to claim 1, characterized in that: The stirring assembly (200) further comprises a stirring head (250), wherein the stirring head (250) is an ellipsoid fixedly connected to the top of the cooling tube (220), and the stirring head (250) comprises a metal shell (251); The metal shell (251) is an ellipsoidal metal shell capable of being adsorbed by the electromagnet (320). The outside of the metal shell (251) is wrapped by a refractory material (211), and the bottom is connected to a cooling pipe (220). The cooling liquid transported by the cooling pipe (220) can circulate inside the metal shell (251).

7. The automatic stirring device for an electric arc furnace used for producing corundum bricks according to claim 6, characterized in that: There is a gap (400) between the metal shell (251), the cooling tube (220) and the refractory material (211), and the stirring head (250) further includes a sealing ring (410), an air pressure sensor (420) and a temperature sensor (430); The sealing ring (410) is fixed at the connection between the gap (400) and the refractory material (211) and the bottom of the cooling pipe (220). The air pressure sensor (420) and the temperature sensor (430) are respectively connected to the gap (400) and measure the air pressure and temperature in the gap (400). When the air pressure and temperature in the gap (400) are abnormal, an alarm is issued.

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