A smelting direct current arc smelting furnace simulation test device

Abstract

The application discloses a smelting direct-current arc smelting furnace simulation testing device, which comprises a support frame, an electrode rod, a lifting adjusting assembly, a smelting furnace body, a moving device, a stirring box, a stirring transmission assembly, a stirring part and an electrode clamp. The electrode clamp has a first state of clamping the electrode rod and a second state of releasing the electrode rod. The support frame is used for mounting the lifting adjusting assembly, the smelting furnace body and the moving device. The lifting adjusting assembly drives the electrode clamp to be movably arranged along a first preset direction. The moving device adjusts the central position of the smelting furnace body to deviate from or approach the position directly below the electrode rod. When the electrode clamp and the electrode rod are in the first state, the electrode rod is driven to move relatively to the smelting furnace body along the first preset direction by the moving motion of the electrode clamp, and the electrode rod approaches or moves away from the smelting furnace body. The electrode rod is provided with the stirring box at the end close to the smelting furnace body. The stirring box is provided with the stirring transmission assembly. The stirring transmission assembly is provided with the stirring part at the end. The application has reasonable and simple structure, and can effectively reduce the complexity of the arc smelting operation process.

Description

TECHNICAL FIELD

[0001] The present application relates to a smelting furnace, in particular to a smelting direct current arc smelting furnace simulation test device, belonging to the technical field of metal smelting equipment. BACKGROUND

[0002] The arc furnace is a kind of electric furnace that can smelt ore and metal by high temperature generated by electrode arc. The working principle of the arc furnace is to convert electric energy into heat energy through the electric arc discharge between the electrode and the furnace charge, so as to heat the furnace charge to a molten state. When the arc furnace is used for metal smelting, the electrode must be adjusted in the lifting direction to control the arc voltage and arc current, so as to maintain the required set value, thereby ensuring stable arc voltage and arc current, and finally achieving stable, low energy consumption and efficient steelmaking operation.

[0003] In the actual smelting process, when the electrode position is deep, the current will surge, causing increased line loss, reduced input power to the furnace, and reduced equipment indicators. On the contrary, when the electrode position is shallow, the current will decrease, causing reduced input power to the furnace and prolonged melting time.

[0004] Currently, the adjustment of the electrode position of the arc furnace used in the laboratory is manually controlled. Before the experiment starts, the electrode needs to be manually controlled to descend and contact the melt. After the arc is started, the electrode needs to be manually controlled to rise. However, the precision of manual control is poor, and the electrode cannot be quickly lifted after the arc is started, which will prolong the contact time between the electrode and the melt, and cannot guarantee the realization of stable arc voltage and arc current. In addition, when the existing device smelts the smelting object by the graphite electrode rod, the smelting object is in a static state when it is smelted, which results in low smelting efficiency, and thus needs to be improved.

[0005] Therefore, the present application is proposed. SUMMARY

[0006] The present application provides a smelting direct current arc smelting furnace simulation test device, which is used to build an arc furnace smelting experiment platform by a reasonable mechanism, and realizes accurate control of the electrode rod lifting based on the platform, which guarantees the stability of the arc voltage and arc current in the smelting process, and thus reduces the complexity of the arc smelting operation process for the experiment personnel.

[0007] The technical scheme of the present application is as follows:

[0008] The utility model provides a smelting direct current arc smelting furnace simulation test device, including support frame 1, electrode stick 2, lifting adjustment component 3, smelting furnace body 4, mobile device 5, stirring box 6, stirring transmission assembly, stirring part 7, electrode clamp 10, the electrode clamp 10 has the first state of clamping the electrode stick 2, has the second state of releasing the electrode stick 2, the support frame 1 is used to install lifting adjustment component 3, smelting furnace body 4, mobile device 5, the lifting adjustment component 3 drives the electrode clamp 10 movably arranged along the first preset direction, the mobile device 5 adjusts the center position of smelting furnace body 4 deviates / approaches the just below electrode stick 2, when the electrode clamp 10 and the electrode stick 2 are in the first state, the electrode stick 2 is driven along the first preset direction relative to smelting furnace body 4 by the moving motion of the electrode clamp 10 and moves away from or approaches, the electrode stick 2 is close to the end of smelting furnace body 4 and is equipped with stirring box 6, the stirring box 6 is equipped with stirring transmission assembly, and the end of stirring transmission assembly is installed stirring part 7.

[0009] Further, the top end position of the support frame 1 is fixedly installed with an upper fixed plate 8, and the middle position of the support frame 1 is fixedly installed with a lower fixed plate 9; the lifting adjustment component 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 installed between the upper fixed plate 8 and the lower fixed plate 9; the upper surface of the upper fixed plate 8 is fixedly installed with the stepping motor 301; the output end of the stepping motor 301 is fixedly connected with one end of the lifting ball screw 304; the ball nut on the lifting ball screw 304 is fixed with 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 for guiding the movement of the lifting plate 15, the electrode clamp 10 and the electrode stick 2 along the first preset direction; one end of the lifting plate 15 is connected with the electrode clamp 10, and the other end of the electrode clamp 10 is used for clamping / releasing the electrode stick 2.

[0010] Further, the electrode clamp 10 is provided with a cooling water inlet and outlet pipeline 11 with an inlet and an outlet, and the cooling water inlet and outlet pipeline 11 is connected with a water cooling system; the free end of the electrode clamp 10 is provided with a mounting hole for mounting the electrode stick 2, and the side end of the electrode clamp 10 is provided with an internal threaded hole perpendicular to the axis direction of the mounting hole, and a clamping screw 12 is screw-connected in the internal threaded hole to clamp the electrode stick 2 passing through the mounting hole.

[0011] Further, the inlet and outlet of the cooling water inlet and outlet pipeline 11 are located on opposite sides of the electrode clamp 10.

[0012] Further, the stirring transmission assembly comprises a stirring motor 701 fixedly installed at an inner top wall of one end of the stirring box 6, an output end of the stirring motor 701 is fixedly installed with a driving gear 702, an inner bottom wall of the stirring box 6 is rotatably installed with a driven gear 703, the driving gear 702 and the driven gear 703 are in meshing transmission with each other, inner rings of the driven gear 703 are uniformly provided with driven gear teeth 704, the inner bottom wall of the stirring box 6 is circumferentially rotatably installed with a stirring gear 705 along the direction of the inner rings of the driven gear 703, the stirring gear 705 and the driven gear teeth 704 are in meshing transmission with each other, and a lower end of the stirring gear 705 is fixedly installed with a stirring part 7.

[0013] Further, the stirring part 7 comprises a main stirring rod 706 penetrating through the inner bottom wall of the stirring box 6, outer walls of both sides of the lower end of the main stirring rod 706 are linearly provided with stirring grooves, and vice stirring rods 707 are rotatably installed in the stirring grooves.

[0014] Further, the lower end of the electrode rod 2 is symmetrically provided with fixed arc plates 13 on the outer surface, the fixed arc plates 13 are symmetrically arranged below the stirring box 6, and both ends of the fixed arc plates 13 are fixedly connected through fastening screws 14.

[0015] Further, 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 circular opening at the top end, the metal shell is filled with a masonry structure 404 provided with a furnace cavity, a through hole is arranged at the bottom of the furnace cavity, the graphite electrode disc 402 is electrically connected with an electrode terminal post 405 at one end surface, the electrode terminal post 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 application are:

[0017] 1. The structure of the present application is reasonable and simple, which effectively reduces the complexity of the arc smelting operation process, and the lifting adjusting assembly can realize accurate control of the lifting of the graphite electrode rod, the arc length between the electrode and the charge can be adjusted by lifting the electrode rod, and the stability of the arc pressure and arc current of the small-scale smelting direct current arc smelting furnace simulation test device is guaranteed.

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

[0019] 3、 The device has high degree of automation, can greatly reduce the workload of staff, improve the work efficiency of staff, the device structure is exquisite, and the creativity is outstanding. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the whole structure schematic diagram of the present application;

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

[0022] Figure 3 It is the top view of the device of the present application;

[0023] Figure 4 It is the position schematic diagram of the electrode stick of the present application;

[0024] Figure 5 It is the position schematic diagram of the upper and lower fixed plate of the present application;

[0025] Figure 6 It is the position schematic diagram of the close screw rod of the present application;

[0026] Figure 7 It is the structure schematic diagram of the stirring transmission assembly and stirring part of the present application;

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

[0028] Figure 9 It is the structure schematic diagram of the smelting furnace body of the present application;

[0029] Figure 10 It is Figure 6 The structure enlarged view of A in the figure;

[0030] The figure, each mark is: 1, support frame;2, electrode stick;3, lifting adjusting assembly;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 post;5, moving device;6, stirring box;7, stirring part;701, stirring motor;702, driving gear;703, driven gear;704, driven gear teeth;705, stirring gear;706, main stirring rod;707, auxiliary stirring rod;8, upper fixed plate;9, lower fixed plate;10, electrode clamp;11, cooling water inlet and outlet pipeline;12, close screw rod;13, fixed arc plate;14, fastening screw;15, lifting plate. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other in any manner without conflict.

[0032] At present, the electrode position adjustment of the electric arc furnace used in the laboratory is in a manual mode. Before the experiment starts, the electrode needs to be manually controlled to descend and contact the melt, and after the arc is started, the electrode needs to be manually controlled to ascend. However, the precision of manual control is poor, and after the arc is started, the electrode cannot be quickly lifted, which will prolong the contact time of the electrode and the melt, and cannot guarantee the realization of stable arc voltage and arc current. The development of a mechanical smelting direct current electric arc smelting furnace simulation test device can replace manual adjustment and effectively solve the defects in the prior art. The present application will be described below in conjunction with the drawings:

[0033] Please refer to Figures 1-10 The smelting direct current electric arc smelting furnace simulation test device shown in the figure comprises a support frame 1, an electrode rod 2, a lifting adjustment assembly 3, a smelting furnace body 4, a moving device 5, a stirring box 6, a stirring transmission assembly, a stirring part 7, and an electrode clamp 10. 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 adjustment assembly 3, the smelting furnace body 4, and the moving device 5. The lifting adjustment assembly 3 drives the electrode clamp 10 to be movably arranged along a first preset direction. The moving device 5 adjusts the central position of the smelting furnace body 4 to deviate from / come close to the position directly below the electrode rod 2. When the electrode clamp 10 and the electrode rod 2 are in the first state, the electrode rod 2 is driven to move along the first preset direction relative to the smelting furnace body 4 by the moving motion of the electrode clamp 10 to move close to or away from the smelting furnace body 4. The electrode rod 2 is provided with the stirring box 6 close to the end of the smelting furnace body 4. The stirring box 6 is provided with the stirring transmission assembly inside. The stirring transmission assembly is provided with the stirring part 7 at the end. Further, the electrode rod 2 can adopt a graphite electrode rod. Figure 1The orientation shown is an example, by opening the stepping motor 301 in the lifting adjustment assembly, driving force can be provided for the lifting of the graphite electrode rod 2, when the graphite electrode rod 2 is powered on, by controlling the height of the graphite electrode rod 2 in the smelting furnace body 4, precise control of the graphite electrode rod 2 is realized, thereby improving the working efficiency of the graphite electrode rod 2, and the stirring part 7 can improve the melting efficiency of the molten liquid, the XY moving device 5 based on Corexy structure can move the smelting furnace body 4 horizontally, which can facilitate the pouring of the molten liquid in the graphite crucible 403, and the water cooling system and power supply system are arranged in the distribution box, and the graphite electrode disc (402) is connected with the power supply system through the electrode terminal post (405).

[0034] Further, the moving device 5 adopts the XY moving device 5 based on Corexy structure, which adopts existing technologies on the market, so the device is not described in detail.

[0035] As shown in Figure 2 and Figure 5 The top end of the support frame 1 is fixedly installed with an upper fixed plate 8, the middle part of the support frame 1 is fixedly installed with a lower fixed plate 9, the lifting adjustment 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 upper surface of the upper fixed plate 8 is fixedly installed with the stepping motor 301, the output end of the stepping motor 301 is fixedly connected with one end of the lifting ball screw 304, and the ball nut on the lifting ball screw 304 is fixedly connected with the lifting plate 15 between the upper fixed plate 8 and the lower fixed plate 9 through bolts; the optical axis guide rail 302 has two groups, which are used for guiding the movement of the lifting plate 15, the electrode clamp 10, and the electrode rod 2 along the first preset direction; one end of the lifting plate 15 is connected with the electrode clamp 10, and the other end of the electrode clamp 10 is used for clamping / releasing the electrode rod 2. By applying the above technical scheme, when the staff turns on the power of the stepping motor 301, the stepping motor 301 starts to drive the lifting ball screw 304 to rotate, and under the limiting of the optical axis guide rail 302, the lifting plate 15 can be lifted, and at this time the graphite electrode rod 2 at one end of the electrode clamp 10 starts to move up and down, thereby the smelting of the molten material in the smelting furnace body 4 can be carried out after the graphite electrode rod 2 is powered on.

[0036] Exemplarily, as shown in Figure 5As shown, 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 stick 2 along the first preset direction; the lifting plate 15 is a T-shaped metal plate, the two ends of the horizontal plate of the lifting plate 15 are used as the first end and the second end, and the first end, the second end and the middle part of the horizontal plate are provided with first assembly holes 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 sleeved on the two groups of optical axis guide rails 302 is fixed on the first end and the second end of the lifting plate 15; the end of the vertical plate of the lifting plate 15 is used as the third end, the third end of the lifting plate 15 is provided with a second assembly hole with internal threads, which is used to connect one end of the electrode clamp 10, and the other end of the electrode clamp 10 is used to clamp / release the electrode stick 2.

[0037] As shown in Figure 6 , the electrode clamp 10 is provided with a cooling water inlet and outlet pipeline 11 with an inlet and an outlet, and the cooling water inlet and outlet pipeline 11 is connected with a water cooling system; the free end of the electrode clamp 10 is provided with a mounting hole for mounting the electrode stick 2, and the side end of the electrode clamp 10 is provided with an internal thread hole perpendicular to the axis direction of the mounting hole, and a clamping screw 12 is screwed in the internal thread hole to clamp the electrode stick 2 passing through the mounting hole.

[0038] Further, the inlet and outlet of the cooling water inlet and outlet pipeline 11 are located on opposite sides of the electrode clamp 10. As shown in Figure 6 , the part of the cooling water inlet and outlet pipeline 11 passing through the electrode clamp 10 is arranged in an S shape, based on this design, while ensuring that the electrode clamp 10 has better cooling effect, the pipeline winding caused by the same side layout can be reduced, and the stability of the device is improved.

[0039] As shown in Figure 6 and Figure 7 , the stirring transmission assembly includes a stirring motor 701, the stirring motor 701 is fixedly installed on the inner top wall of one end of the stirring box 6, the output end of the stirring motor 701 is fixedly installed with a driving gear 702, the inner bottom wall of the stirring box 6 is rotatably installed with a driven gear 703, the driving gear 702 and the driven gear 703 are in meshing transmission with each other, the inner circle of the driven gear 703 is uniformly provided with driven teeth 704, the inner bottom wall of the stirring box 6 is circumferentially rotatably installed with a stirring gear 705 along the inner circle direction of the driven gear 703, the stirring gear 705 and the driven teeth 704 are in meshing transmission with each other, and the lower end of the stirring gear 705 is fixedly installed with a stirring part 7. The stirring part 7 includes a main stirring rod 706, the main stirring rod 706 penetrates the inner bottom wall of the stirring box 6, and the lower end of the main stirring rod 706 is linearly provided with a stirring groove on the outer wall of each side, and a sub-stirring rod 707 is rotatably installed in the stirring groove.

[0040] AsFigure 10 As shown, the lower end outer surface of the graphite electrode rod 2 is symmetrically provided with a fixed arc plate 13, which is provided below the stirring box 6. The two ends of the symmetrically arranged fixed arc plate 13 are fixedly connected by a fastening screw rod 14. When the staff member completes the installation of the graphite electrode rod 2, the staff member inserts the stirring box 6 into the lower end of the graphite electrode rod 2, and then installs the fixed arc plate 13 on the outer surface of the graphite electrode rod 2 by the fastening screw rod 14. At this time, the fixed arc plate 13 is provided below the stirring box 6, thereby providing support for the stirring box 6. The stirring box 6 is made of ceramic, and the main stirring rod 706 and the auxiliary stirring rod 707 are made of high-temperature-resistant material. At this time, by starting the stirring motor 701 of the stirring transmission assembly, the stirring motor 701 drives the driving gear 702 to rotate. The rotation of the driving gear 702 drives the driven gear 703 to rotate. The rotation of the driven gear 703 drives the stirring gear 705 at the upper end of the main stirring rod 706 to rotate. At this time, when the main stirring rod 706 rotates, the auxiliary stirring rod 707 is lifted and opened by the centrifugal force, thereby realizing the stirring of the molten liquid in the smelting furnace body 4, and improving the working efficiency of the device.

[0041] As shown in the Figure 9 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 structure, and a metal shell with a circular opening at the top end is used. The metal shell is filled with a masonry structure 404 with a furnace cavity inside. A through hole is provided at the bottom of the furnace cavity. The graphite electrode disc 402 is electrically connected to an electrode terminal post 405 at one end surface. The electrode terminal post 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 conduct electricity to the graphite electrode disc. The smelting furnace body 4 is located below the graphite electrode rod 2. The 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 by an electrode wire. 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 end of the electrode terminal post 405. The graphite electrode disc 402 is screw-connected to the external thread of the electrode terminal post 405 through the internal thread of the connecting hole. The through hole of the electrode terminal post 405 is provided at the bottom of the masonry structure 404, and the through hole is sealed with fireclay.

[0042] Before use, first install the graphite electrode rod 2 through the tightening screw 12 at the end of the electrode clamp 10, then put the smelting material into the graphite crucible 403, place the graphite crucible 403 in the masonry structure 404, then start the XY moving device 5 based on the Corexy structure to make the center position of the smelting furnace body 4 approach directly below the graphite electrode rod 2, at this time, adjust the start of the stepping motor 301, and the stepping motor 301 drives the output end to start driving the lifting ball screw 304 to rotate, at this time, the lifting plate 15 is in threaded engagement with the lifting ball screw 304 for transmission, thereby making the lifting plate 15 lift and lower under the limitation of the optical axis guide rail 302, when the electrode clamp 10 moves downward, the graphite electrode rod 2 extends to the preset position in the graphite crucible 403, stop the lifting plate 15 from descending, and the electrode clamp 10 is stable, at this time, the graphite electrode rod 2 is powered on, the high temperature generated by the electric arc of the graphite electrode rod 2 smelts the metal, and the smelting is simultaneously started with the stirring motor 701, the stirring motor 701 can drive the driving gear 702 to rotate, the driving gear 702 and the driven gear 703 are in meshing transmission, the driven gear 703 can rotate, the driven gear teeth 704 are uniformly arranged in the inner circle of the driven gear 703, the stirring gear 705 starts to rotate when the driven gear teeth 704 are in meshing transmission with the stirring gear 705, then the main stirring rod 706 rotates, the secondary stirring rod 707 starts to be subjected to centrifugal force after the main stirring rod 706 rotates, thereby the secondary stirring rod 707 can mix and stir the molten liquid, thereby the smelting efficiency of the device can be improved, after the metal smelting is completed, the water cooling system is started, the cooling water flows into the cooling water inlet and outlet pipeline 11 in the electrode clamp 10 through the pipeline, thereby the electrode clamp 10 is cooled and treated, the stepping motor 301 is started, the electrode clamp 10 moves upward, the height of the graphite electrode rod 2 is lifted, the graphite electrode rod 2 is taken out from the graphite crucible 403 of the graphite crucible 403, after the graphite electrode rod 2 reaches the required position, the lifting plate 15 stops rising, the electrode clamp 10 is stable, at this time, the XY moving device 5 based on the Corexy structure is started to move the smelting furnace body 4 to the position convenient for taking out the graphite crucible 403, the graphite crucible 403 is clamped with the crucible tongs and the metal solution in the graphite crucible 403 is poured out.

[0043] It can be known from the above technical solution that the structure of the present application is reasonable and simple, and the complexity of the electric arc smelting operation process is effectively reduced; the lifting adjusting assembly is stable in connection, the accurate control of the lifting 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, and the stability of the arc pressure and arc current of the smelting direct current electric arc smelting furnace simulation test device is guaranteed.

[0044] The specific embodiments of the present application are described above in detail with reference to the accompanying drawings, but the present application is not limited to the above-described embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present application.

Claims

1. A simulated testing apparatus for a smelting direct current arc furnace, characterized by, Including support frame (1), electrode stick (2), lifting adjusting assembly (3), smelting furnace body (4), moving device (5), stirring box (6), stirring transmission assembly, stirring part (7), electrode clamp (10), the electrode clamp (10) has the first state of clamping the electrode stick (2), has the second state of releasing the electrode stick (2);The support frame (1) is used to install lifting adjusting assembly (3), smelting furnace body (4), moving device (5), the lifting adjusting assembly (3) drives the electrode clamp (10) movably arranged along the first preset direction;The moving device (5) adjusts the center position of the smelting furnace body (4) deviates / approaches the just below electrode stick (2);When the electrode clamp (10) and the electrode stick (2) are in the first state, the electrode stick (2) is driven to move along the first preset direction relative to the smelting furnace body (4) by the moving motion of the electrode clamp (10) and approaches or moves away;The electrode stick (2) is provided with a stirring box (6) near the smelting furnace body (4) end, the stirring box (6) is provided with a stirring transmission assembly, and the stirring transmission assembly is provided with a stirring part (7) at the end thereof; The stirring transmission assembly comprises a stirring motor (701), the stirring motor (701) is fixedly installed in the inner top wall of one end of the stirring box (6), the output end of the stirring motor (701) is fixedly installed with a driving gear (702), the inner bottom wall of the stirring box (6) is rotatably installed with a driven gear (703), and the driving gear (702) and the driven gear (703) are in meshing transmission with each other;The inner ring of the driven gear (703) is uniformly provided with a driven tooth (704), and the inner bottom wall of the stirring box (6) is circumferentially rotatably installed with a stirring gear (705) along the inner ring direction of the driven gear (703), the stirring gear (705) and the driven tooth (704) are in meshing transmission with each other, and the lower end of the stirring gear (705) is fixedly installed with a stirring part (7); The stirring part (7) comprises a main stirring rod (706), the main stirring rod (706) penetrates the inner bottom wall of the stirring box (6), and the lower end of the main stirring rod (706) is linearly provided with a stirring groove on the outer wall of both sides thereof, and a secondary stirring rod (707) is rotatably installed in the stirring groove. The lower end of the electrode stick (2) is symmetrically provided with a fixed arc plate (13) on the outer surface thereof, the fixed arc plate (13) is arranged below the stirring box (6), and the two ends of the symmetrically arranged fixed arc plate (13) are fixedly connected by a fastening screw (14).

2. The simulated test apparatus for a smelting DC arc furnace as defined in claim 1, wherein, The top end of the support frame (1) is fixedly installed with an upper fixed plate (8), and the middle part of the support frame (1) is fixedly installed with a lower fixed plate (9), the lifting adjusting 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 installed between the upper fixed plate (8) and the lower fixed plate (9), the upper surface of the upper fixed plate (8) is fixedly installed with the stepping motor (301), the output end of the stepping motor (301) is fixedly connected with one end of the lifting ball screw (304), and the ball nut on the lifting ball screw (304) is fixed with the lifting plate (15) between the upper fixed plate (8) and the lower fixed plate (9); the optical axis guide rail (302) has two groups, which are used for guiding the movement of the lifting plate (15), the electrode clamp (10) and the electrode stick (2) along a first preset direction; one end of the lifting plate (15) is connected with the electrode clamp (10), and the other end of the electrode clamp (10) is used for clamping / releasing the electrode stick (2).

3. The simulated test apparatus for a smelting DC arc furnace as defined in claim 1, wherein, The electrode clamp (10) is provided with a cooling water inlet and outlet pipeline (11) with an inlet and an outlet, and the cooling water inlet and outlet pipeline (11) is connected with a water cooling system; the free end of the electrode clamp (10) is provided with a mounting hole for mounting the electrode stick (2), and the side end of the electrode clamp (10) is provided with an internal threaded hole perpendicular to the axis direction of the mounting hole, and a tight screw rod (12) is screw-connected in the internal threaded hole for tightly fixing the electrode stick (2) passing through the mounting hole.

4. The simulated test apparatus for a smelting DC arc furnace as defined in claim 3, wherein, The inlet and outlet of the cooling water inlet and outlet pipeline (11) are located on the opposite sides of the electrode clamp (10).

5. The simulated test apparatus for a smelting DC arc furnace as defined in claim 1 wherein, The smelting furnace body (4) comprises 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 at the top end, the inside of the metal shell is filled with a masonry structure (404) provided with a furnace cavity, a through hole is arranged at the bottom of the furnace cavity, one end surface of the graphite electrode disc (402) is electrically connected with an electrode terminal post (405), the electrode terminal post (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).

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