Simulation test device for smelting direct-current arc smelting furnace

Abstract

The invention discloses a smelting direct-current arc smelting furnace simulation test device, which comprises a support frame, an electrode bar, a lifting adjustment assembly, a smelting furnace body, a moving device, a stirring box, a stirring transmission assembly, a stirring part and an electrode clamp, and is characterized in that the electrode clamp has a first state for clamping the electrode bar and a second state for releasing the electrode bar; the supporting frame is used for installing the lifting adjusting assembly, the smelting furnace body and the moving device. The lifting adjusting assembly drives the electrode clamp to be movably arranged in the first preset direction. The moving device is used for adjusting the central position of the smelting furnace body to deviate from / approach to the position under the electrode bar; when the electrode clamp and the electrode bar are in the first state, the electrode clamp moves to drive the electrode bar to move close to or away from the smelting furnace body in the first preset direction; a stirring box is arranged at the end, close to the smelting furnace body, of the electrode bar, a stirring transmission assembly is arranged in the stirring box, and a stirring part is installed at the tail end of the stirring transmission assembly. The device is reasonable and simple in structural design, and the complexity of the electric arc melting operation process is effectively reduced.

Description

Technical Field

[0001] The invention relates to a smelting furnace, in particular to a smelting DC arc smelting furnace simulation test device, belonging to the technical field of metal smelting equipment. Background Art

[0002] An electric arc furnace is a type of electric furnace that can melt ores and metals by relying on the high temperature generated by the electrode arc. The working principle of an electric arc furnace is to convert electrical energy into thermal energy through the arc discharge generated between the electrode and the charge, thereby heating the charge to a molten state. When using an electric arc furnace to carry out metal smelting work, the electrodes must be adjusted up and down to control the arc voltage and arc current, so as to maintain them at the required set values, thereby ensuring stable arc voltage and arc current, and ultimately achieving stable, low-energy and efficient steelmaking operations.

[0003] In the actual smelting process, when the electrode position is too deep, it will cause the current to surge, increase the line loss, reduce the input furnace power, and reduce various equipment indicators; on the contrary, when the electrode position is too shallow, it will cause the current to decrease, reduce the input furnace power, and prolong the melting time.

[0004] At present, the electric arc furnace used in the laboratory adopts manual adjustment of the electrode position. Before the experiment begins, the electrode needs to be manually controlled to descend and contact with the melt. After the arc is struck, the electrode needs to be manually controlled to rise. However, the accuracy of manual control is poor, and the electrode cannot be lifted quickly after the arc is struck, which will prolong the contact time between the electrode and the melt, and cannot ensure the realization of stable arc voltage and arc flow. At the same time, when the existing device melts the smelting object through the graphite electrode rod, the smelting material is in a static state when being melted. At this time, the melting efficiency is low, and it needs to be improved.

[0005] In view of this, the present invention is proposed. Summary of the invention

[0006] The present invention provides a smelting DC arc melting furnace simulation test device, which is used to construct an arc furnace smelting experimental platform through a reasonable mechanism. Based on the platform, precise control of the lifting and lowering of electrode rods is achieved, ensuring the stability of arc voltage and arc current during the smelting process, thereby reducing the complexity of the arc melting operation process for experimenters.

[0007] The technical solution of the present invention is:

[0008] A smelting DC arc melting furnace simulation test device comprises a support frame 1, an electrode rod 2, a lifting and adjusting assembly 3, a melting furnace body 4, a moving device 5, a stirring box 6, a stirring transmission assembly, a stirring part 7, and an electrode fixture 10, wherein the electrode fixture 10 has a first state of clamping the electrode rod 2 and a second state of releasing the electrode rod 2; the support frame 1 is used to install the lifting and adjusting assembly 3, the melting furnace body 4, and the moving device 5, and the lifting and adjusting assembly 3 drives the electrode fixture 10 to be movably arranged along a first preset direction; the moving device 5 adjusts the center position of the melting furnace body 4 to deviate from / approach the bottom of the electrode rod 2; when the electrode fixture 10 and the electrode rod 2 are in the first state, the electrode rod 2 is driven to move closer to or away from the melting furnace body 4 along the first preset direction through the moving movement of the electrode fixture 10; a stirring box 6 is provided at the end of the electrode rod 2 close to the melting furnace body 4, a stirring transmission assembly is provided in the stirring box 6, and a stirring part 7 is installed at the end of the stirring transmission assembly.

[0009] Furthermore, an upper fixed plate 8 is fixedly installed at the top position of the support frame 1, and a lower fixed plate 9 is fixedly installed at the middle position of the support frame 1. The lifting and lowering adjustment component 3 includes a stepping motor 301, an optical axis guide rail 302, a lifting ball screw 304, and a lifting plate 15. The lifting ball screw 304 is rotatably installed between the upper fixed plate 8 and the lower fixed plate 9. The stepping motor 301 is fixedly installed on the upper surface of the upper fixed plate 8. The output end of the stepping motor 301 is fixedly connected to one end of the lifting ball screw 304. The ball nut on the lifting ball screw 304 is fixed to the lifting plate 15 located between the upper fixed plate 8 and the lower fixed plate 9; the optical axis guide rail 302 has two groups, which are used to guide the movement of the lifting plate 15, the electrode fixture 10, and the electrode rod 2 along the first preset direction; the lifting plate 15 is connected to one end of the electrode fixture 10, and the other end of the electrode fixture 10 is used to clamp / release the electrode rod 2.

[0010] Furthermore, a cooling water inlet and outlet pipe 11 with an inlet and an outlet is provided in the electrode fixture 10, and the cooling water inlet and outlet pipe 11 is connected to a water cooling system; a mounting hole for mounting the electrode rod 2 is provided at the free end of the electrode fixture 10, and an internal threaded hole perpendicular to the axial direction of the mounting hole is provided at the side end of the electrode fixture 10, and a tightening screw 12 is spirally connected in the internal threaded hole for tightening the electrode rod 2 passing through the mounting hole.

[0011] Furthermore, the inlet and the outlet of the cooling water inlet and outlet pipe 11 are located on two opposite sides of the electrode fixture 10 .

[0012] Furthermore, the stirring transmission assembly includes a stirring motor 701, which is fixedly mounted on the inner top wall of one end of the stirring box 6, and a driving gear 702 is fixedly mounted on the output end of the stirring motor 701, and a driven gear 703 is rotatably mounted on the inner bottom wall of the stirring box 6, and the driving gear 702 and the driven gear 703 are meshed with each other for transmission; the inner ring of the driven gear 703 is evenly provided with driven teeth 704, and a stirring gear 705 is rotatably mounted on the inner bottom wall of the stirring box 6 along the inner ring direction of the driven gear 703, and the stirring gear 705 is meshed with the driven teeth 704, and a stirring portion 7 is fixedly mounted on the lower end of the stirring gear 705.

[0013] Furthermore, the stirring portion 7 includes a main stirring rod 706, which penetrates the inner bottom wall of the stirring box 6, and the outer walls on both sides of the lower end of the main stirring rod 706 are linearly provided with stirring grooves, and auxiliary stirring rods 707 are rotatably installed in the stirring grooves.

[0014] Furthermore, a fixed arc plate 13 is symmetrically provided on the outer surface of the lower end of the electrode rod 2 . The fixed arc plate 13 is provided below the stirring box 6 . Both ends of the symmetrically provided fixed arc plate 13 are fixedly connected by fastening screws 14 .

[0015] Furthermore, the smelting furnace body 4 includes a furnace wall 401, a graphite electrode disc 402 and a graphite crucible 403. The furnace wall 401 adopts a metal shell with a circular opening on the top, and the interior of the metal shell is filled with a masonry structure 404 with a furnace cavity. A through hole is provided at the bottom of the furnace cavity. One end surface of the graphite electrode disc 402 is electrically connected to an electrode terminal 405, and the electrode terminal 405 is arranged at the center of the bottom of the furnace cavity. The graphite crucible 403 is placed in the furnace cavity in the masonry structure 404, and the bottom surface of the graphite crucible 403 is in contact with the top surface of the graphite electrode disc 402.

[0016] The beneficial effects of the present invention are:

[0017] 1. The structural design of the present invention is reasonable and simple, which effectively reduces the complexity of the arc melting operation process. The lifting and lowering adjustment component can realize the precise control of the lifting and lowering of the graphite electrode rod. The arc length between the electrode and the charge can be adjusted by lifting the electrode rod, thereby ensuring the stability of the arc voltage and arc current of the small-scale smelting DC arc melting furnace simulation test device.

[0018] 2. The stirring assembly can stir the molten liquid in the smelting furnace when the graphite electrode rod is working, which greatly improves the working efficiency of the device.

[0019] 3. This device has a high degree of automation, which can greatly reduce the workload of staff and improve their work efficiency. The device has a sophisticated structure and outstanding creativity. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the position of the stepping motor of the present invention;

[0022] Figure 3 A top view of the device of the present invention;

[0023] Figure 4 It is a schematic diagram of the position of the electrode rod of the present invention;

[0024] Figure 5 It is a schematic diagram of the positions of the upper and lower fixing plates of the present invention;

[0025] Figure 6 It is a schematic diagram of the position of the fixing screw of the present invention;

[0026] Figure 7 It is a structural schematic diagram of the stirring transmission assembly and the stirring part of the present invention;

[0027] Figure 8 It is a schematic diagram of the position of the electrode terminal of the present invention;

[0028] Fig. 9 It is a structural schematic diagram of the smelting furnace body of the present invention;

[0029] Fig.10 for Figure 6 A magnified view of the structure at center A;

[0030] The numbers in the figure are: 1. support frame; 2. electrode rod; 3. lifting adjustment component; 301. stepping motor; 302. optical axis guide rail; 303. linear sliding bearing; 304. lifting ball screw; 4. smelting furnace body; 401. furnace wall; 402. graphite electrode disc; 403. graphite crucible; 404. masonry structure; 405. electrode terminal; 5. moving device; 6. stirring box; 7. stirring part; 701. stirring motor; 702. driving gear; 703. driven gear; 704. driven gear; 705. stirring gear; 706. main stirring rod; 707. auxiliary stirring rod; 8. upper fixed plate; 9. lower fixed plate; 10. electrode fixture; 11. cooling water inlet and outlet pipes; 12. tightening screw; 13. fixed arc plate; 14. tightening screw; 15. lifting plate. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. It should be noted that the embodiments in this application and the features in the embodiments can be combined with each other arbitrarily without conflict.

[0032] At present, the electric arc furnaces used in laboratories use manual methods to adjust the electrode position. Before the experiment begins, the electrode needs to be manually controlled to descend and contact the melt, and after the arc is struck, the electrode needs to be manually controlled to rise. However, the accuracy of manual control is poor, and the electrode cannot be lifted quickly after the arc is struck, which prolongs the contact time between the electrode and the melt, and cannot ensure stable arc voltage and arc current. The development of a mechanical smelting DC arc melting furnace simulation test device can replace manual adjustment and effectively solve the defects of the prior art. The present invention is explained below in conjunction with the accompanying drawings:

[0033] See also Figure 1-Figure 10 As shown, a smelting DC arc melting furnace simulation test device includes a support frame 1, an electrode rod 2, a lifting and adjusting component 3, a melting furnace body 4, a moving device 5, a stirring box 6, a stirring transmission component, a stirring part 7, and an electrode clamp 10, wherein the electrode clamp 10 has a first state of clamping the electrode rod 2 and a second state of releasing the electrode rod 2; the support frame 1 is used to install the lifting and adjusting component 3, the melting furnace body 4, and the moving device 5, and the lifting and adjusting component 3 drives the electrode clamp 10 to be movably arranged along a first preset direction; the moving device 5 adjusts the center position of the melting furnace body 4 to deviate from / approach the bottom of the electrode rod 2; when the electrode clamp 10 and the electrode rod 2 are in the first state, the moving movement of the electrode clamp 10 drives the electrode rod 2 to move closer to or away from the melting furnace body 4 along the first preset direction; the electrode rod 2 is provided with a stirring box 6 at the end close to the melting furnace body 4, and a stirring transmission component is provided in the stirring box 6, and a stirring part 7 is installed at the end of the stirring transmission component. Furthermore, the electrode rod 2 may be a graphite electrode rod. Figure 1Taking the position shown as an example, by turning on the stepper motor 301 in the lifting and adjusting assembly, a driving force can be provided for the lifting of the graphite electrode rod 2. When the graphite electrode rod 2 is energized, by controlling the height of the graphite electrode rod 2 in the smelting furnace body 4, the graphite electrode rod 2 can be precisely controlled, thereby improving the working efficiency of the graphite electrode rod 2. At the same time, the melting efficiency of the molten liquid can be improved by the stirring part 7. The XY moving device 5 based on the Corexy structure can horizontally move the smelting furnace body 4, which can facilitate the pouring of the molten liquid in the graphite crucible 403. A water cooling system and a power supply system are arranged in the distribution box, and the graphite electrode disc (402) is connected to the power supply system through the electrode terminal (405).

[0034] Furthermore, the moving device 5 adopts an XY moving device 5 based on a Corexy structure. Since the XY moving device 5 based on a Corexy structure adopts existing technology on the market, the present device is not described in detail.

[0035] like Figure 2 and Figure 5 As shown, an upper fixed plate 8 is fixedly installed at the top position of the support frame 1, and a lower fixed plate 9 is fixedly installed at the middle position of the support frame 1. The lifting and adjusting assembly 3 includes a stepping motor 301, an optical axis guide rail 302, a lifting ball screw 304, and a lifting plate 15. The lifting ball screw 304 is rotatably installed between the upper fixed plate 8 and the lower fixed plate 9. The stepping motor 301 is fixedly installed on the upper surface of the upper fixed plate 8. The output end of the stepping motor 301 is fixedly connected to one end of the lifting ball screw 304. The ball nut on the lifting ball screw 304 is fixed to the lifting plate 15 located between the upper fixed plate 8 and the lower fixed plate 9 by bolts; the optical axis guide rail 302 has two groups, which are used to guide the movement of the lifting plate 15, the electrode fixture 10, and the electrode rod 2 along the first preset direction; the lifting plate 15 is connected to one end of the electrode fixture 10, and the other end of the electrode fixture 10 is used to clamp / release the electrode rod 2. By applying the above technical solution, when the staff turns on the power of the stepper motor 301, the stepper motor 301 starts to drive the lifting ball screw 304 to rotate. Through the rotation of the lifting ball screw 304 and the limitation of the optical axis guide rail 302, the lifting plate 15 can be lifted and lowered. At this time, the graphite electrode rod 2 at one end of the electrode clamp 10 starts to move up and down, and then after the graphite electrode rod 2 is powered on, the material to be melted in the smelting furnace body 4 can be melted.

[0036] For example, Figure 5As shown, there are two groups of optical axis guide rails 302, which are used to guide the movement of the lifting plate 15, the electrode fixture 10, and the electrode rod 2 along the first preset direction; the lifting plate 15 is a T-shaped metal plate, and the two ends of the horizontal plate of the lifting plate 15 serve as the first end and the second end. The first end, the second end and the middle part of the horizontal plate of the lifting plate 15 are provided with a first assembly hole for the optical axis guide rail 302 and the lifting ball screw 304 located between the two groups of optical axis guide rails 302 to pass through; the linear sliding bearing 303 mounted on the two groups of optical axis guide rails 302 is fixed to the first end and the second end of the lifting plate 15; the longitudinal plate end of the lifting plate 15 serves as the third end, and the third end of the lifting plate 15 is provided with a second assembly hole with an internal thread for connecting with one end of the electrode fixture 10, and the other end of the electrode fixture 10 is used to clamp / release the electrode rod 2.

[0037] like Figure 6 As shown, the electrode fixture 10 is provided with a cooling water inlet and outlet pipe 11 with an inlet and an outlet, and the cooling water inlet and outlet pipe 11 is connected to a water cooling system; the free end of the electrode fixture 10 is provided with a mounting hole for mounting the electrode rod 2, and the side end of the electrode fixture 10 is provided with an internal threaded hole perpendicular to the axial direction of the mounting hole, and a tightening screw 12 is spirally connected in the internal threaded hole for tightening the electrode rod 2 passing through the mounting hole.

[0038] Furthermore, the inlet and outlet of the cooling water inlet and outlet pipe 11 are located on opposite sides of the electrode fixture 10. Figure 6 As shown in the figure, the cooling water inlet and outlet pipes 11 passing through the electrode fixture 10 are partially arranged in an S shape. Based on this design, while ensuring that the electrode fixture 10 has a better cooling effect, the pipe entanglement caused by the same-side layout can be reduced, thereby improving the stability of the device.

[0039] like Figure 6 and Figure 7 As shown, the stirring transmission assembly includes a stirring motor 701, which is fixedly mounted on the inner top wall of one end of the stirring box 6, a driving gear 702 is fixedly mounted on the output end of the stirring motor 701, a driven gear 703 is rotatably mounted on the inner bottom wall of the stirring box 6, the driving gear 702 and the driven gear 703 are meshed with each other for transmission, the inner ring of the driven gear 703 is evenly provided with driven teeth 704, a stirring gear 705 is rotatably mounted on the inner bottom wall of the stirring box 6 along the inner ring direction of the driven gear 703, the stirring gear 705 and the driven teeth 704 are meshed with each other, and a stirring part 7 is fixedly mounted on the lower end of the stirring gear 705. The stirring part 7 includes a main stirring rod 706, which penetrates the inner bottom wall of the stirring box 6, and the outer walls on both sides of the lower end of the main stirring rod 706 are linearly provided with stirring grooves, and auxiliary stirring rods 707 are rotatably mounted in the stirring grooves.

[0040] like Fig.10 As shown, the lower end outer surface of the graphite electrode rod 2 is symmetrically fitted with a fixed arc plate 13, and the fixed arc plate 13 is fitted under the stirring box 6. Both ends of the symmetrically arranged fixed arc plate 13 are fixedly connected by fastening screws 14, so that when the staff completes the installation of the graphite electrode rod 2, the staff inserts the stirring box 6 at the lower end of the graphite electrode rod 2, and then installs the fixed arc plate 13 to the outer surface of the graphite electrode rod 2 through the fastening screws 14. At this time, the fixed arc plate 13 is fitted under the stirring box 6, thereby providing support for the stirring box 6. At the same time, the stirring box 6 is a ceramic material. The main stirring rod 706 and the auxiliary stirring rod 707 are both made of high temperature resistant material. At this time, by turning on the stirring motor 701 of the stirring transmission assembly, the stirring motor 701 can drive the driving gear 702 to rotate, and the rotation of the driving gear 702 can drive the driven gear 703 to rotate. The rotation of the driven gear 703 can make the stirring gear 705 at the upper end of the main stirring rod 706 rotate. At this time, when the main stirring rod 706 rotates, the auxiliary stirring rod 707 begins to be lifted and opened by the centrifugal force, thereby realizing the stirring of the molten liquid in the smelting furnace body 4, thereby improving the working efficiency of the device.

[0041] like Fig. 9 As shown, the smelting furnace body 4 includes a furnace wall 401, a graphite electrode disc 402 and a graphite crucible 403. The furnace wall 401 is a rectangular parallelepiped structure, and adopts a metal shell with a round opening at the top. The interior of the metal shell is filled with a masonry structure 404 with a furnace cavity. The bottom of the furnace cavity is provided with a through hole. One end surface of the graphite electrode disc 402 is electrically connected to an electrode terminal 405, and the electrode terminal 405 is arranged at the center of the bottom of the furnace cavity. The graphite crucible 403 is placed in the furnace cavity in the masonry structure 404, and the bottom surface of the graphite crucible 403 is in contact with the top surface of the graphite electrode disc 402, so as to facilitate the graphite electrode. The machine disc is energized, the smelting furnace body 4 is located below the graphite electrode rod 2, a graphite electrode disc 402 is placed at the bottom of the masonry structure 404 in the smelting furnace body 4 and is connected to the power supply system through electrode wiring. Specifically: a connecting hole with an internal thread is provided at the center of the graphite electrode disc 402, an external thread is provided on the outer wall of the top of the electrode terminal 405, the graphite electrode disc 402 is spirally connected to the external thread of the electrode terminal 405 through the internal thread of the connecting hole, and a through hole for the electrode terminal 405 is provided at the bottom of the masonry structure 404, and the through hole is sealed with fireproof mud.

[0042] Before use, the graphite electrode rod 2 is first installed on the end of the electrode fixture 10 through the fixing screw 12, and then the smelt is placed in the graphite crucible 403, and the graphite crucible 403 is placed in the masonry structure 404. Then, the XY moving device 5 based on the Corexy structure is started to make the center position of the smelting furnace body 4 approach to the bottom of the graphite electrode rod 2. At this time, the stepper motor 301 is adjusted and started. The stepper motor 301 drives the output end to start driving the lifting ball screw 304 to rotate. At this time, the lifting plate 15 and the lifting ball screw 304 are threadedly engaged for transmission. , and then the lifting plate 15 is lifted and lowered under the limit of the optical axis guide rail 302. When the electrode fixture 10 moves downward and the graphite electrode rod 2 extends into the preset position in the graphite crucible 403, the lifting plate 15 stops descending, and the electrode fixture 10 is stable and immovable. At this time, the graphite electrode rod 2 is energized, and the high temperature generated by the arc of the graphite electrode rod 2 melts the metal. At the same time, the stirring motor 701 is turned on, and the stirring motor 701 can drive the driving gear 702 to rotate. The meshing transmission between the driving gear 702 and the driven gear 703 can make the driven gear 70 3 is rotated, and the inner ring of the driven gear 703 is evenly provided with driven teeth 704. When the driven teeth 704 are meshed with the stirring gear 705, the stirring gear 705 starts to rotate, and then the main stirring rod 706 rotates. When the main stirring rod 706 rotates, the auxiliary stirring rod 707 begins to be subjected to centrifugal force, and then the molten liquid can be mixed and stirred by the auxiliary stirring rod 707, so as to improve the smelting efficiency of the device. After the metal smelting is completed, the water cooling system is started, and the cooling water flows into the cooling water inlet and outlet pipe 11 in the electrode fixture 10 through the pipeline. , thereby cooling the electrode fixture 10; starting the stepper motor 301 to move the electrode fixture 10 upward, raising the height of the graphite electrode rod 2, so that the graphite electrode rod 2 is taken out of the graphite crucible 403 of the graphite crucible 403, and after the graphite electrode rod 2 reaches the desired position, the lifting plate 15 stops rising, and the electrode fixture 10 is stable and motionless. At this time, the XY moving device 5 based on the Corexy structure is started to move the smelting furnace body 4 to a position where the graphite crucible 403 is convenient to take out, and the graphite crucible 403 is clamped with a crucible tongs and the metal solution therein is poured out.

[0043] By applying the above technical scheme, it can be seen that the structural design of the present invention is reasonable and simple, which effectively reduces the complexity of the arc melting operation process; the lifting and adjusting component is firmly connected, and the precise control of the lifting and lowering of the graphite electrode rod can be realized. The arc length between the electrode and the charge can be adjusted by lifting the graphite electrode rod, thereby ensuring the stability of the arc voltage and arc current of the smelting DC arc melting furnace simulation test device.

[0044] The specific implementation modes of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above implementation modes, and various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention.

Claims

1. A smelting DC arc melting furnace simulation test device, characterized in that: The invention comprises a support frame (1), an electrode rod (2), a lifting and adjusting component (3), a smelting furnace body (4), a moving device (5), a stirring box (6), a stirring transmission component, a stirring part (7), and an electrode clamp (10); the electrode clamp (10) has a first state for clamping the electrode rod (2) and a second state for releasing the electrode rod (2); the support frame (1) is used for installing the lifting and adjusting component (3), the smelting furnace body (4), and the moving device (5); the lifting and adjusting component (3) drives the electrode clamp (10) to be movably arranged along a first preset direction; The moving device (5) adjusts the center position of the smelting furnace body (4) to deviate from / approach the position directly below the electrode rod (2); when the electrode fixture (10) and the electrode rod (2) are in a first state, the moving movement of the electrode fixture (10) drives the electrode rod (2) to move closer to or away from the smelting furnace body (4) along a first preset direction; a stirring box (6) is provided at the end of the electrode rod (2) close to the smelting furnace body (4), a stirring transmission assembly is provided in the stirring box (6), and a stirring portion (7) is installed at the end of the stirring transmission assembly.

2. The smelting DC arc melting furnace simulation test device according to claim 1 is characterized in that: An upper fixing plate (8) is fixedly mounted at the top position of the support frame (1), a lower fixing plate (9) is fixedly mounted at the middle position of the support frame (1), the lifting adjustment assembly (3) comprises a stepping motor (301), an optical axis guide rail (302), a lifting ball screw (304), and a lifting plate (15), the lifting ball screw (304) is rotatably mounted between the upper fixing plate (8) and the lower fixing plate (9), a stepping motor (301) is fixedly mounted on the upper surface of the upper fixing plate (8), and the output of the stepping motor (301) The end of the lifting ball screw (304) is fixedly connected to one end of the lifting ball screw (304), and the ball nut on the lifting ball screw (304) is fixed to the lifting plate (15) located between the upper fixed plate (8) and the lower fixed plate (9); the optical axis guide rail (302) has two groups, which are used to guide the movement of the lifting plate (15), the electrode clamp (10), and the electrode rod (2) along a first preset direction; the lifting plate (15) is connected to one end of the electrode clamp (10), and the other end of the electrode clamp (10) is used to clamp / release the electrode rod (2).

3. The smelting DC arc melting furnace simulation test device according to claim 1, characterized in that: The electrode fixture (10) is provided with a cooling water inlet and outlet pipe (11) having an inlet and an outlet, and the cooling water inlet and outlet pipe (11) is connected to a water cooling system; a mounting hole for mounting an electrode rod (2) is provided at a free end of the electrode fixture (10), and an internal threaded hole perpendicular to the axial direction of the mounting hole is provided at a side end of the electrode fixture (10); a fixing screw (12) is screwed into the internal threaded hole for fixing the electrode rod (2) passing through the mounting hole.

4. The smelting DC arc melting furnace simulation test device according to claim 3 is characterized in that: The inlet and the outlet of the cooling water inlet and outlet pipe (11) are located on two opposite sides of the electrode fixture (10).

5. The smelting DC arc melting furnace simulation test device according to claim 1, characterized in that: The stirring transmission assembly comprises a stirring motor (701), the stirring motor (701) is fixedly mounted on the inner top wall of one end of the stirring box (6), a driving gear (702) is fixedly mounted on the output end of the stirring motor (701), a driven gear (703) is rotatably mounted on the inner bottom wall of the stirring box (6), the driving gear (702) and the driven gear (703) are meshed with each other for transmission; the inner ring of the driven gear (703) is evenly provided with driven teeth (704), a stirring gear (705) is rotatably mounted on the inner bottom wall of the stirring box (6) along the inner ring direction of the driven gear (703), the stirring gear (705) and the driven teeth (704) are meshed with each other, and a stirring portion (7) is fixedly mounted on the lower end of the stirring gear (705).

6. The smelting DC arc melting furnace simulation test device according to claim 1, characterized in that: The stirring portion (7) comprises a main stirring rod (706), wherein the main stirring rod (706) penetrates the inner bottom wall of the stirring box (6), and the outer walls on both sides of the lower end of the main stirring rod (706) are linearly provided with stirring grooves, and auxiliary stirring rods (707) are rotatably installed in the stirring grooves.

7. The smelting DC arc melting furnace simulation test device according to claim 1, characterized in that: A fixed arc plate (13) is symmetrically arranged on the outer surface of the lower end of the electrode rod (2), and the fixed arc plate (13) is arranged below the stirring box (6). Both ends of the symmetrically arranged fixed arc plate (13) are fixedly connected by a fastening screw (14).

8. The smelting DC arc melting furnace simulation test device according to claim 1, characterized in that: The smelting furnace body (4) comprises a furnace wall (401), a graphite electrode disc (402) and a graphite crucible (403); the furnace wall (401) is a metal shell with a round opening at the top; the interior of the metal shell is filled with a masonry structure (404) provided with a furnace cavity; a through hole is provided at the bottom of the furnace cavity; an end surface of the graphite electrode disc (402) is electrically connected to an electrode terminal (405); the electrode terminal (405) is provided at the center of the bottom of the furnace cavity; the graphite crucible (403) is placed in the furnace cavity in the masonry structure (404), and the bottom surface of the graphite crucible (403) is in contact with the top surface of the graphite electrode disc (402).

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