Intelligent preheating device for an electric arc furnace

Abstract

The present application relates to the technical fields of preheating device, and discloses an intelligent preheating device for ore smelting furnace, which comprises an ore smelting furnace body and a furnace top connecting piece arranged on one side of the ore smelting furnace body, the furnace top connecting piece is integrally formed with a sealing sleeve on the side facing the ore smelting furnace body, three groups of hot gas guide openings are uniformly arranged on the side of the sealing sleeve away from the ore smelting furnace body in the circumferential direction, and the inner side wall of the sealing sleeve away from the hot gas guide openings is uniformly arranged with six groups of heat conduction fins in the circumferential direction. In the present application, the six groups of heat conduction connecting frames are uniformly distributed along the circumference of the sealing sleeve, drive the heat conduction fins to form an annular heat conduction area on the upper part of the direct current electrode mechanism, and make the heat evenly transmitted to the electrode paste column, so as to avoid the electrode paste solidification and stagnation caused by local low temperature, significantly improve the initial condition of electrode roasting, restrain the paste suspension phenomenon from the source, and at the same time, strengthen the stability of the upper structure of the electrode and reduce the risk of electrode fracture.

Description

Technical Field

[0001] This invention relates to the field of preheating device technology, specifically to an intelligent preheating device for a submerged arc furnace. Background Technology

[0002] DC submerged arc furnaces, as core equipment in the production of metallurgical and chemical products such as ferroalloys, calcium carbide, and yellow phosphorus, have seen their application share gradually increase in China's metallurgical industry due to their advantages such as relatively low energy consumption, strong furnace stability, and easy control of product quality. However, some DC submerged arc furnaces currently in use in China are experiencing frequent electrode sludge problems due to insufficient control over electrode roasting conditions. This has become a core bottleneck restricting the stable operation of the equipment and hindering its mature promotion, seriously impeding the improvement of production efficiency and the implementation of safe production in the industry.

[0003] To address the issue of electrode paste suspension, the industry has attempted to improve the situation by optimizing the electrode paste ratio and standardizing the paste-adding process. At the same time, electrode preheating technology has been gradually introduced. Among these technologies, a 40kW heating system, which is suitable for the electrode preheating needs of small and medium-sized DC submerged arc furnaces, has begun to be tested in practice. Its core idea is to preheat the electrode paste in advance, maintain its temperature within a suitable softening range, improve the roasting conditions, and eliminate electrode paste suspension at its source.

[0004] However, the 40kW heating systems and traditional electrode preheating devices currently used in China still have many technical defects, mainly in terms of poor heating uniformity. They mostly adopt an integral heating structure, which cannot specifically focus on the high-temperature zone at the top of the paste column. This causes the electrode paste around the electrode shell and ribs to sinter prematurely, while the central area remains unliquefied, forming a temperature gradient and sintering voids, which exacerbates the risk of paste suspension. Therefore, this invention proposes an intelligent preheating device for submerged arc furnaces. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this invention provides an intelligent preheating device for submerged arc furnaces, which solves the problem of poor heating uniformity.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the present invention provides the following technical solution: an intelligent preheating device for a submerged arc furnace, comprising a submerged arc furnace body and a furnace top connector located on one side of the submerged arc furnace body. A sealing kit is integrally formed on the side of the furnace top connector facing the furnace body, and the sealing kit is fixedly welded to the top end face of the furnace body. Three sets of hot gas inlets are evenly distributed circumferentially on the side of the sealing kit facing away from the furnace body. Each hot gas inlet is inserted into and fixedly welded to the sealing kit on its side. On the kit, six sets of heat-conducting plates are evenly distributed along the circumference of the inner wall of the sealing kit away from the hot gas inlet. Each heat-conducting plate is fixedly connected to a heat-conducting connecting frame on the side facing the inner wall of the sealing kit. The side of the heat-conducting connecting frame away from the heat-conducting plate passes through the sealing kit and is fixedly installed. The furnace top connector is equipped with a furnace cover on the inner wall away from the electric arc furnace body. The furnace cover is movably fitted to the inner wall of the furnace top connector. A DC electrode mechanism is provided through the central area of ​​the side of the furnace cover away from the electric arc furnace body.

[0009] Preferably, a heat-conducting ring frame is fixedly installed on the side of the heat-conducting connecting frame away from the main body of the submerged arc furnace, and the heat-conducting ring frame is coaxially arranged with the sealing kit. Three sets of mounting plates are evenly fixedly connected along the circumferential direction on the top end face of the heat-conducting ring frame away from the main body of the submerged arc furnace. A heat-conducting electrical connection mechanism is fixedly installed on the side of each mounting plate away from the heat-conducting ring frame. The side of the mounting plate facing the furnace top connector is fixedly connected to the outer wall of the furnace top connector.

[0010] Preferably, the furnace cover has a docking protrusion in the center of the side facing the DC electrode mechanism. The bottom end face of the DC electrode mechanism passes through the docking protrusion and extends into the interior of the electric arc furnace body. An induction coupling mechanism is fixedly installed on the side of the DC electrode mechanism away from the electric arc furnace body. The side of the induction coupling mechanism facing the top end face of the docking protrusion is fixedly and sealed to the docking protrusion. A limiting notch is provided on the furnace top connector corresponding to the position of the induction coupling mechanism, and the induction coupling mechanism can move up and down and fit into the interior of the limiting notch.

[0011] Preferably, a cylindrical support rod is fixedly embedded on one side of the furnace cover perpendicular to the mating protrusion. A connecting rod is fixedly sleeved on the outer side of the cylindrical support rod away from the outer wall of the furnace cover. A rotating support rod is installed through the side of the connecting rod away from the cylindrical support rod. An auxiliary rotating component is sleeved on the outer wall of the rotating support rod and rotatably installed thereon. The auxiliary rotating component is fixedly connected to the inner wall of the connecting rod.

[0012] Preferably, a lifting connector is fixedly installed on the side of the inductive coupling mechanism away from the DC electrode mechanism, and an auxiliary rotating component is fixedly connected to the side of the lifting connector away from the DC electrode mechanism. The inductive coupling mechanism is fixedly connected to the auxiliary rotating component.

[0013] Preferably, a rotating rod is threaded through and connected to the center of the auxiliary rotating component two. A bracket component one is installed on the side of the rotating rod facing the main body of the electric arc furnace. The bottom end face of the rotating rod passes through the bracket component one and is rotatably connected to the bracket component one through a bearing. A motor one is fixedly installed on the side of the bracket component one away from the rotating rod, and the output end of the motor one is fixedly connected to the bottom end face of the rotating rod.

[0014] Preferably, a lifting auxiliary housing is fixedly installed on the side of the support member facing away from the motor, and the lifting auxiliary housing is sleeved on the outer side of the auxiliary rotating member two facing the inner wall of the auxiliary rotating member two, and the outer wall of the auxiliary rotating member two slides and fits against the inner wall of the rotating rod.

[0015] Preferably, the lifting auxiliary housing has an avoidance opening on the outer wall facing the lifting connector and the inductive electrical linkage mechanism, and the lifting connector and the inductive electrical linkage mechanism extend into the lifting auxiliary housing through the avoidance opening and are fixedly connected to the auxiliary rotating component two.

[0016] Preferably, a second bracket is installed on the bottom end face of the pivot member opposite to the connecting rod member. The bottom end face of the pivot member passes through the second bracket and is rotatably connected to the second bracket via a bearing. A second motor is fixedly installed on the side of the second bracket away from the pivot member, and the output end of the second motor is fixedly connected to the bottom end face of the pivot member. A limit head is fixedly installed on the top end face of the pivot member opposite to the second bracket.

[0017] In summary, the technical effects and advantages of this invention are as follows:

[0018] In this invention, a precise and targeted upper heat conduction system is constructed by setting a sealing kit between the furnace top connector and the submerged arc furnace body, combined with an integrally formed sloping furnace top connector structure, six evenly spaced heat-conducting connecting frames, and built-in heat-conducting plates. This effectively solves the problem of sludge suspension induced by low temperatures at the upper part of the electrode. The sealing kit not only ensures the furnace body's airtightness and reduces heat loss, but also provides a stable installation foundation for the heat-conducting components. The sloping structure optimizes the heat conduction path layout. The six sets of heat-conducting connecting frames are evenly distributed around the circumference of the sealing kit, causing the heat-conducting plates to adhere to the upper part of the DC electrode mechanism to form an annular heat-conducting zone. This allows heat to be evenly transferred to the electrode paste column, avoiding localized low temperatures that cause the electrode paste to solidify and become stuck. This significantly improves the initial conditions for electrode roasting, curbs sludge suspension from the source, and strengthens the stability of the upper electrode structure, reducing the risk of electrode breakage.

[0019] In this invention, three sets of hot air inlets are evenly spaced and run through the sloping structure, forming a dual anti-foaming protection system in conjunction with the heat-conducting structure, further improving the operational reliability of the submerged arc furnace. The hot air delivered by the three sets of inlets, guided along the sloping structure, forms a rotating airflow in conjunction with the DC electrode mechanism. This airflow disturbs the electrode paste inside the electrode shell, breaking the rigid adhesion between the paste and the shell wall and ribs, preventing mechanical jamming. Simultaneously, it replenishes the heat from the upper part, superimposing its effect with the heat-conducting plate to maintain the electrode paste within a suitable flow range. This design balances sealing performance and heat circulation efficiency, locking in heat through sealing components and the heat-conducting structure while enhancing heat uniformity with rotating hot air. This completely eliminates accidents such as paste leakage and electrode breakage caused by foaming, extending equipment lifespan and ensuring continuous and stable operation of the submerged arc furnace. It provides core technical support for the mature and large-scale application of DC submerged arc furnaces. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of an intelligent preheating device for a submerged arc furnace according to the present invention.

[0021] Figure 2 This is a top view schematic diagram of the overall structure of an intelligent preheating device for a submerged arc furnace according to the present invention;

[0022] Figure 3 This is a schematic diagram of the overall structure of the connecting rod, pivot rod, and furnace cover of the present invention;

[0023] Figure 4 This is a bottom schematic diagram of the overall structure of the furnace top connector and heat-conducting ring frame of the present invention;

[0024] Figure 5 This is a top view of the overall structure of the furnace top connector and heat-conducting ring frame of the present invention;

[0025] Figure 6 This is a schematic diagram of the overall structure of the lifting connector and DC electrode mechanism of the present invention;

[0026] Figure 7 This is a cross-sectional schematic diagram of the overall structure of the lifting connector and DC electrode mechanism of the present invention.

[0027] In the diagram: 1. Submerged arc furnace body; 2. Furnace top connector; 201. Sealing kit; 202. Hot gas inlet; 203. Limiting notch; 3. Connecting rod; 301. Cylindrical support rod; 302. Auxiliary rotating part one; 4. Heat-conducting ring frame; 401. Heat-conducting sheet; 402. Heat-conducting connecting frame; 403. Heat-conducting electrical linkage mechanism; 404. Mounting connecting plate; 5. Lifting connector; 501. Auxiliary rotating part two; 502. Rotating rod; 503. Motor one; 504. Support part one; 505. Lifting auxiliary shell; 6. DC electrode mechanism; 601. Induction electrical linkage mechanism; 7. Rotating support rod; 701. Support part two; 702. Motor two; 703. Limiting head; 8. Furnace cover; 801. Docking protrusion. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] refer to Figures 1-7 The intelligent preheating device for a submerged arc furnace shown in the figure is illustrated in the following specific embodiment:

[0030] Example 1

[0031] A sealing kit 201 is integrally formed on the side of the furnace top connector 2 facing the electric arc furnace body 1. The sealing kit 201 is fixedly welded to the top end face of the electric arc furnace body 1 to achieve a sealed connection at the top of the furnace body. On the side of the sealing kit 201 away from the electric arc furnace body 1, three sets of hot air inlets 202 are evenly arranged along the circumference. The end of each hot air inlet 202 facing the sealing kit 201 is inserted into and fixedly welded to it to ensure the stability of hot air delivery. On the inner side wall of the sealing kit 201 away from the hot air inlets 202, six sets of heat-conducting plates 401 are evenly arranged along the circumference. A heat-conducting connecting frame 402 is fixedly connected to the side of each heat-conducting plate 401 facing the inner wall of the sealing kit 201. The end of the heat-conducting connecting frame 402 away from the heat-conducting plate 401 passes through the sealing kit 201 and is fixedly installed.

[0032] A heat-conducting connecting frame 402 is fixedly installed on the side facing away from the main body 1 of the submerged arc furnace, and the heat-conducting ring frame 4 is coaxially arranged with the sealing kit 201 to ensure uniform heat conduction. The heat-conducting ring frame 4 faces away from the top end face of the submerged arc furnace body 1, and three sets of mounting plates 404 are evenly fixedly connected along the circumferential direction. The end of each mounting plate 404 facing away from the heat-conducting ring frame 4 is fixedly installed with a heat-conducting electrical linkage mechanism 403. At the same time, the side of the mounting plate 404 facing the furnace top connector 2 is fixedly connected to the outer wall of the furnace top connector 2, forming a stable integrated structure for heat conduction and installation.

[0033] Example 2

[0034] A furnace top connector 2 is fitted with a furnace cover 8 on its inner side facing away from the inner wall of the submerged arc furnace body 1. The furnace cover 8 is movably fitted to the inner wall of the furnace top connector 2 to accommodate subsequent operational adjustments. A cylindrical support rod 301 is fixedly embedded on the side of the furnace cover 8 perpendicular to the docking protrusion 801. A connecting rod 3 is fixedly sleeved on the outer side of the cylindrical support rod 301 facing away from the outer wall of the furnace cover 8. A rotating support rod 7 is installed through the end of the connecting rod 3 facing away from the cylindrical support rod 301. An auxiliary rotating part 302 is sleeved and rotatably installed on the rotating support rod 7 facing the outer wall of the connecting rod 3. The auxiliary rotating part 302 is fixedly connected to the inner wall of the connecting rod 3, realizing a flexible rotational connection between the connecting rod and the rotating support rod.

[0035] A support member 701 is installed on the bottom end face of the pivot member 7, opposite to the bottom end face of the connecting rod 3. The bottom end face of the pivot member 7 passes through the support member 701 and is rotatably connected to the support member 701 via a bearing. A motor 702 is fixedly installed on the side of the support member 701 opposite to the pivot member 7. The output end of the motor 702 is fixedly connected to the bottom end face of the pivot member 7 to provide power drive for the pivot member. A limit head 703 is fixedly installed on the top end face of the pivot member 7 opposite to the support member 701 to provide limit protection.

[0036] Example 3

[0037] A DC electrode mechanism 6 is installed through the central area of ​​the side of the furnace cover 8 facing away from the main body 1 of the submerged arc furnace. A mating protrusion 801 is formed in the central area of ​​the side of the furnace cover 8 facing the DC electrode mechanism 6. The bottom end face of the DC electrode mechanism 6 passes through the mating protrusion 801 and extends into the interior of the submerged arc furnace body 1, ensuring normal electrode operation. An inductive coupling mechanism 601 is fixedly installed on the side of the DC electrode mechanism 6 facing away from the main body 1 of the submerged arc furnace. The side of the inductive coupling mechanism 601 facing the top end face of the mating protrusion 801 is fixedly and sealed to the mating protrusion 801, ensuring sealing performance and electrical conductivity stability.

[0038] A limiting notch 203 is provided on the furnace top connector 2 at the position corresponding to the induction coupling mechanism 601. The induction coupling mechanism 601 can move up and down and fit inside the limiting notch 203 to adapt to electrode lifting and lowering adjustment, limiting the DC electrode mechanism 6 to the lowest position. A lifting connector 5 is fixedly installed on the side of the induction coupling mechanism 601 away from the DC electrode mechanism 6. An auxiliary rotating component 501 is fixedly connected to the side of the lifting connector 5 away from the DC electrode mechanism 6. The induction coupling mechanism 601 and the auxiliary rotating component 501 are fixedly connected to form an electrode lifting and lowering transmission link.

[0039] Example 4

[0040] A rotating rod 502 is threaded through and connected to the center of auxiliary rotating component 2 501. A bracket 504 is installed on the side of the rotating rod 502 facing the main body 1 of the electric arc furnace. The bottom end face of the rotating rod 502 passes through the bracket 504 and is rotatably connected to the bracket 504 via a bearing, achieving stable support and rotation of the rotating rod. A motor 503 is fixedly installed on the side of the bracket 504 away from the rotating rod 502. The output end of the motor 503 is fixedly connected to the bottom end face of the rotating rod 502, providing power for the rotation of the rotating rod. A lifting auxiliary housing 505 is fixedly installed on the side of the bracket 504 away from the motor 503. The lifting auxiliary housing 505 is fitted onto the outer side of auxiliary rotating component 2 501, facing the inner wall of the auxiliary rotating component 2 501, and the outer wall of the auxiliary rotating component 2 501 slides against the inner wall of the rotating rod 502, ensuring smooth lifting and adjustment. The lifting auxiliary housing 505 has an opening on the outer wall facing the lifting connector 5 and the inductive electrical linkage mechanism 601. The lifting connector 5 and the inductive electrical linkage mechanism 601 extend into the lifting auxiliary housing 505 through the opening and are fixedly connected to the auxiliary rotating part 501, taking into account both structural protection and transmission continuity.

[0041] Working principle of this invention:

[0042] During operation, the sealing kit 201 first forms a sealed cavity with the electric arc furnace body 1 and the furnace top connector 2, blocking heat loss and providing a sealed environment for preheating and operation. After the heat conduction and electrical connection mechanism 403 is activated, the heat is conducted to the heat conduction ring frame 4 through the mounting plate 404, and then transferred to the heat conduction plate 401 inside the sealing kit 201 through six sets of heat conduction connecting frames 402. The heat conduction plate 401 is attached to the upper part of the DC electrode mechanism 6 to form an annular heating zone, which accurately heats the upper part of the electrode paste column and avoids the paste from solidifying and sticking due to low temperature.

[0043] Simultaneously, three sets of hot air inlets 202 deliver hot air into the sealed cavity, guided along the sloping structure of the furnace top connector 2, forming a rotating airflow in conjunction with the DC electrode mechanism 6. This airflow disturbs the electrode paste inside the electrode shell, breaking its rigid adhesion to the shell wall and ribs, while simultaneously supplementing heat. This heat, combined with the heat conduction effect of the heat-conducting sheet 401, maintains the electrode paste within a suitable flow range, effectively mitigating the risk of paste suspension. The furnace cover 8 is connected to the rotating support rod 7 via the cylindrical support rod 301 and connecting rod 3. The motor 702 drives the rotating support rod 7 to rotate, allowing the furnace cover 8 to flexibly adjust its position to adapt to different operating conditions.

[0044] The lifting and lowering of the DC electrode mechanism 6 is driven by motor 503. Motor 503 drives the rotating rod 502 to rotate, which in turn drives the auxiliary rotating component 501 to move up and down along the lifting auxiliary housing 505 via threaded transmission. This movement is then connected to the lifting connector 5, which in turn drives the induction coupling mechanism 601 and the DC electrode mechanism 6 to move up and down. The limiting notch 203 limits the induction coupling mechanism 601, ensuring smooth lifting and lowering. The induction coupling mechanism 601 and the docking protrusion 801 are sealed together, ensuring continuity of conductivity and preventing air and heat leakage. The coordinated operation of all components integrates electrode preheating, hot air assistance, and position adjustment, solving the problem of sludge buildup and ensuring continuous and efficient operation of the submerged arc furnace.

[0045] All electrical components mentioned in this article are connected to an external main controller and 220V AC mains power, and the main controller can be a conventional known device such as a computer that can control it.

[0046] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An intelligent preheating device for a submerged arc furnace, comprising a submerged arc furnace body (1) and a furnace top connector (2) disposed on one side of the submerged arc furnace body (1), characterized in that: The furnace top connector (2) has a sealing kit (201) integrally formed on the side facing the electric arc furnace body (1), and the sealing kit (201) is fixedly welded to the top end face of the electric arc furnace body (1). The sealing kit (201) has three sets of hot gas inlets (202) evenly distributed in the circumferential direction on the side facing away from the electric arc furnace body (1). Each hot gas inlet (202) is inserted into and fixedly welded to the sealing kit (201) on the side facing away from the sealing kit (201). The inner wall of the sealing kit (201) facing away from the hot gas inlets (202) has six evenly distributed in the circumferential direction. Each heat-conducting plate (401) is fixedly connected to a heat-conducting connecting frame (402) on the side facing the inner wall of the sealing kit (201). The heat-conducting connecting frame (402) passes through the sealing kit (201) and is fixedly installed on the side away from the heat-conducting plate (401). The furnace top connector (2) is equipped with a furnace cover (8) on the inner side wall away from the electric arc furnace body (1). The furnace cover (8) is movably fitted to the inner wall of the furnace top connector (2). A DC electrode mechanism (6) is provided through the central area of ​​the side of the furnace cover (8) away from the electric arc furnace body (1).

2. The intelligent preheating device for a submerged arc furnace according to claim 1, characterized in that: The heat-conducting connecting frame (402) is fixedly installed with a heat-conducting ring frame (4) on the side away from the electric arc furnace body (1), and the heat-conducting ring frame (4) is coaxially arranged with the sealing kit (201). Three sets of mounting plates (404) are evenly fixedly connected along the circumferential direction on the top end face of the heat-conducting ring frame (4) away from the electric arc furnace body (1). Each mounting plate (404) is fixedly installed with a heat-conducting electric linkage mechanism (403) on the side away from the heat-conducting ring frame (4). The side of the mounting plate (404) facing the furnace top connector (2) is fixedly connected to the outer wall of the furnace top connector (2).

3. The intelligent preheating device for a submerged arc furnace according to claim 1, characterized in that: The furnace cover (8) has a docking protrusion (801) in the center area of ​​the side facing the DC electrode mechanism (6). The bottom end face of the DC electrode mechanism (6) passes through the docking protrusion (801) and extends into the interior of the electric arc furnace body (1). An induction coupling mechanism (601) is fixedly installed on the side of the DC electrode mechanism (6) away from the electric arc furnace body (1). The side of the induction coupling mechanism (601) facing the top end face of the docking protrusion (801) is fixedly sealed and fitted with the docking protrusion (801). A limiting notch (203) is opened on the furnace top connector (2) at the position corresponding to the induction coupling mechanism (601), and the induction coupling mechanism (601) can be moved up and down and fitted into the interior of the limiting notch (203).

4. The intelligent preheating device for a submerged arc furnace according to claim 3, characterized in that: A cylindrical support rod (301) is fixedly embedded on one side of the furnace cover (8) perpendicular to the docking protrusion (801). A connecting rod (3) is fixedly sleeved on the outer side of the cylindrical support rod (301) away from the furnace cover (8). A rotating support rod (7) is installed through the side of the connecting rod (3) away from the cylindrical support rod (301). An auxiliary rotating part (302) is sleeved on the outer wall of the connecting rod (3) and rotatably installed. The auxiliary rotating part (302) is fixedly connected to the inner wall of the connecting rod (3).

5. The intelligent preheating device for a submerged arc furnace according to claim 3, characterized in that: The inductive coupling mechanism (601) is fixedly installed with a lifting connector (5) on the side away from the DC electrode mechanism (6). The lifting connector (5) is fixedly connected with an auxiliary rotating component (501) on the side away from the DC electrode mechanism (6). The inductive coupling mechanism (601) and the auxiliary rotating component (501) are fixedly connected.

6. The intelligent preheating device for a submerged arc furnace according to claim 5, characterized in that: A rotating rod (502) is threaded through and connected to the center of the auxiliary rotating component 2 (501). A bracket 1 (504) is installed on the side of the rotating rod (502) facing the electric arc furnace body (1). The bottom end face of the rotating rod (502) passes through the bracket 1 (504) and is rotatably connected to the bracket 1 (504) through a bearing. A motor 1 (503) is fixedly installed on the side of the bracket 1 (504) away from the rotating rod (502), and the output end of the motor 1 (503) is fixedly connected to the bottom end face of the rotating rod (502).

7. The intelligent preheating device for a submerged arc furnace according to claim 6, characterized in that: The support component 1 (504) is fixedly installed with a lifting auxiliary housing (505) on the side away from the motor 1 (503). The lifting auxiliary housing (505) is sleeved on the outside of the auxiliary rotating component 2 (501) facing the inner wall of the auxiliary rotating component 2 (501), and the outer wall of the auxiliary rotating component 2 (501) slides and fits against the inner wall of the rotating rod (502).

8. The intelligent preheating device for a submerged arc furnace according to claim 7, characterized in that: The lifting auxiliary housing (505) has an opening on the outer wall of the lifting connector (5) and the induction linkage mechanism (601), and the lifting connector (5) and the induction linkage mechanism (601) extend into the lifting auxiliary housing (505) through the opening and are fixedly connected to the auxiliary rotating part (501).

9. The intelligent preheating device for a submerged arc furnace according to claim 4, characterized in that: The bottom end face of the pivot member (7) opposite to the bottom end face of the connecting rod (3) is equipped with a bracket member two (701). The bottom end face of the pivot member (7) passes through the bracket member two (701) and is rotatably connected to the bracket member two (701) through a bearing. The side of the bracket member two (701) opposite to the pivot member (7) is fixedly equipped with a motor two (702), and the output end of the motor two (702) is fixedly connected to the bottom end face of the pivot member (7). The top end face of the pivot member (7) opposite to the bracket member two (701) is fixedly equipped with a limit head (703).

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