A deoxidation equipment for copper rod casting furnace

Abstract

The present invention relates to the technical field of casting deoxidation equipment, specifically a copper rod casting furnace deoxidation equipment, which is used to remove oxygen in the furnace body of the casting furnace. The copper rod casting furnace deoxidation equipment includes a deoxidizer feeder and a hollow pneumatic shaft, the deoxidizer feeder has a discharge port extending into the furnace body; the pneumatic shaft is rotatably arranged in the discharge port of the deoxidizer feeder, the first end of the pneumatic shaft is inserted into the furnace body and is provided with exhaust holes arranged along the tangential direction of the pneumatic shaft, the second end of the pneumatic shaft is connected to a nitrogen supply device, and a spiral blade is fixedly provided on the outer wall of the pneumatic shaft, and a spiral feeding channel is formed between the spiral blade and the inner wall of the discharge port of the deoxidizer feeder. The present invention utilizes the reaction force generated when nitrogen is injected into the furnace body to drive the pneumatic shaft to rotate, so as to realize automatic, continuous and quantitative addition of deoxidizer, and the injection of nitrogen also plays a stirring role to ensure that the deoxidizer is fully mixed with the copper liquid.

Description

Technical Field

[0001] The invention relates to the technical field of casting deoxidation equipment, in particular to deoxidation equipment for a copper rod casting furnace. Background Art

[0002] In the copper rod casting process, the oxygen content in the copper liquid is an important factor affecting the quality of the copper rod. Oxygen will cause oxide inclusions in the copper rod, reduce the mechanical properties and electrical conductivity of the copper rod, and may even cause bubbles to form during the casting process, affecting the appearance and dimensional accuracy of the casting. Therefore, it is very important to remove oxygen during the copper rod casting process.

[0003] At present, the commonly used deoxidation method in the copper rod casting process is deoxidation with deoxidizer, but the deoxidizer addition process is generally operated manually. The operator adds deoxidizer to the furnace body in small amounts and multiple times, and stirs it with tools to promote the deoxidation reaction. However, this method is difficult to accurately control the amount of deoxidizer added each time, and the stirring uniformity is poor, which can easily cause incomplete deoxidation or excessive oxygen content in local areas. Summary of the invention

[0004] The object of the present invention is to provide a deoxidation device for a copper rod casting furnace, so as to solve the problems raised in the above-mentioned background technology.

[0005] The present invention is achieved through the following technical solutions:

[0006] A deoxidation device for a copper rod casting furnace is used to remove oxygen from the furnace body of the casting furnace. The deoxidation device for the copper rod casting furnace comprises a deoxidizer feeder and a hollow pneumatic shaft. The deoxidizer feeder has a discharge port extending into the furnace body; the pneumatic shaft is rotatably arranged in the discharge port of the deoxidizer feeder, the first end of the pneumatic shaft is inserted into the furnace body and is provided with exhaust holes arranged along the tangential direction of the pneumatic shaft, the second end of the pneumatic shaft is connected to a nitrogen supply device, a spiral blade is fixedly provided on the outer wall of the pneumatic shaft, and a spiral discharge channel is formed between the spiral blade and the inner wall of the discharge port of the deoxidizer feeder.

[0007] Optionally, the second end of the pneumatic shaft is rotatably connected to the nitrogen supply device via a rotating connecting piece.

[0008] Optionally, a power assist device is provided at the second end of the pneumatic shaft, and the power assist device is configured to provide a force in a tangential direction to the pneumatic shaft in a non-contact manner.

[0009] Optionally, the copper rod casting furnace deoxidation equipment further comprises a stirring structure, wherein the stirring structure is fixed to the first end of the pneumatic shaft and rotates synchronously with the pneumatic shaft.

[0010] Optionally, the casting furnace includes a furnace cover, and an exhaust gap is left between the furnace cover and the furnace body of the casting furnace. The furnace cover and the furnace body are movably connected along the covering direction of the furnace cover through a connecting structure to control the width of the exhaust gap.

[0011] Optionally, a water tank is provided at the edge of the furnace body, the upper end of the water tank is an open structure, and the edge of the furnace cover is provided with a sealing edge extending toward the opening direction of the water tank, and the sealing edge extends from the opening of the water tank into the interior of the water tank.

[0012] Optionally, the deoxygenation equipment of the copper rod casting furnace also includes a slag remover, which is an annular component. A slag discharge port is formed between the inner hole of the slag remover and the outer wall of the pneumatic shaft. The outer diameter of the slag remover is adapted to the inner diameter of the furnace body, and the downward end of the slag remover is a cone.

[0013] Optionally, the slag remover is connected to the furnace cover of the casting furnace via a second connecting structure.

[0014] Compared with the prior art, the present invention provides a deoxidation device for a copper rod casting furnace, which has the following beneficial effects:

[0015] The present invention effectively combines nitrogen deoxidation and deoxidizer deoxidation. On the one hand, the reaction force when nitrogen is discharged into the furnace body is used to drive the pneumatic shaft to rotate, so as to achieve the purpose of automatically adding a small amount of deoxidizer into the furnace body continuously. On the other hand, the nitrogen discharged into the furnace body can also achieve the effect of stirring and mixing the deoxidizer and the copper liquid, so as to achieve more efficient deoxidation.

[0016] The present invention provides a rotating communicating vessel so that the pneumatic shaft can be rotatably connected with the deoxidizer feeder. The rotating communicating vessel is provided with a sealing bearing and an air inlet and other structures, which can effectively transport nitrogen from a static supply device to a dynamically rotating pneumatic shaft, thereby ensuring stable transportation of nitrogen.

[0017] The present invention sets an exhaust gap between the furnace cover and the furnace body of the casting furnace, and adopts a connecting structure to control the width of the exhaust gap. The width of the exhaust gap can be flexibly adjusted according to different processing requirements, thereby realizing the function of dynamically adjusting the exhaust gap between the furnace cover and the furnace body. This arrangement allows the original air in the furnace to be discharged smoothly when nitrogen is filled into the furnace body, ensuring that the oxygen content in the furnace body is maintained at a low level, while avoiding the risk of excessive air pressure in the furnace body. Compared with the open or fixed-gap furnace body design in the prior art, this effectively reduces the oxygen content in the copper liquid, optimizes the casting environment, and improves the quality of copper castings;

[0018] The present invention provides a slag remover with an annular component in a furnace body, and utilizes a slag discharge port formed between the inner hole of the slag remover and the outer wall of a pneumatic shaft. This arrangement allows light oxides generated by a deoxidation reaction to float to the surface of the copper liquid along the conical surface of the slag remover and the slag discharge port to form scum, and nitrogen bubbles are used to push the scum to the edge of the furnace body to form an annular scum ring. As the copper rod production proceeds and the amount of copper liquid decreases, the scum ring is eventually placed on the slag remover, thereby effectively separating the scum from the copper liquid. In addition, the annular slag groove and the liquid discharge port provided on the top of the slag remover further improve the scum collection effect and prevent the copper liquid from mixing into the scum. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of embodiment 1 of the present invention;

[0020] Figure 2 It is a structural schematic diagram of embodiment 1 of the present invention;

[0021] Figure 3 It is a structural schematic diagram of embodiment 1 of the present invention;

[0022] Figure 4 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0023] Figure 5 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0024] Figure 6 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0025] Figure 7 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0026] Figure 8 This is a schematic diagram of the structure of Example 2 of the present invention.

[0027] In the figure: 1, furnace body; 1-a, first furnace body; 1-b, second furnace body; 1-c, insulation layer; 2, crystallizer; 3, cooling device; 4, cooling water inlet; 5, cooling water outlet; 6, furnace cover; 7, edge sealing; 8, deoxidizer feeder; 9, pneumatic shaft; 10, discharge port; 11, exhaust hole; 12, nitrogen supply equipment; 13, spiral blade; 14, rotary connecting vessel; 14-a, connecting seat; 14-b, sealed bearing; 14-c, air cavity; 14-d, air inlet; 14-e, air inlet nozzle; 15, power assist device; 15-a, active fan blade; 15-b, driven fan blade; 15-c, motor; 15-d, air guide cylinder; 15-e, first mounting frame; 15-f, second mounting frame; 16, stirring bracket; 1 6-a, main bracket; 16-b, auxiliary bracket; 17, connection structure one; 17-a, connecting pin; 17-b, connecting ear; 17-c, spring; 17-d, first connection hole; 18, connection structure two; 18-a, connecting rod; 18-b, connecting sleeve; 18-c, second connection hole; 18-d, limit head; 18-e, step-type through hole; 18-f, third connection hole; 18-g, nut; 19, water storage tank; 20, slag remover; 20-a, cone surface; 20-b, slag trough; 20-c, drainage hole; 21, slag discharge port; 22, exhaust gap; 23, feeding port; 24, sealing cover; 25, cleaning rack; 25-a, first cleaning section; 25-b, second cleaning section; 26, gate knife; 27, pneumatic disk. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Example 1: Please refer to Figure 1 According to an embodiment of the present invention, a technical solution is provided: a deoxidation device for a copper rod casting furnace, which is used to remove oxygen from a furnace body 1 of a casting furnace. The deoxidation device for the copper rod casting furnace comprises a deoxidizer feeder 8 and a hollow pneumatic shaft 9. The deoxidizer feeder 8 has a discharge port 10 extending into the furnace body 1; the pneumatic shaft 9 is rotatably arranged in the discharge port 10 of the deoxidizer feeder 8, the first end of the pneumatic shaft 9 is inserted into the furnace body 1 and is provided with an exhaust hole 11 arranged along the tangential direction of the pneumatic shaft 9, the second end of the pneumatic shaft 9 is connected to a nitrogen supply device 12, and a spiral blade 13 is fixedly provided on the outer wall of the pneumatic shaft 9, and a spiral discharge channel is formed between the spiral blade 13 and the inner wall of the discharge port 10 of the deoxidizer feeder 8.

[0030] When implementing the above scheme, the nitrogen supply device 12 injects nitrogen into the copper liquid in the furnace body 1 through the pneumatic shaft 9 to replace oxygen, reduce the oxygen content in the furnace body 1 and the copper liquid, and when the exhaust hole 11 of the pneumatic shaft 9 discharges nitrogen into the furnace body 1, since the exhaust hole 11 is arranged along the tangential direction of the pneumatic shaft 9, the pneumatic shaft 9 can be reversed by nitrogen to rotate. When the pneumatic shaft 9 rotates, the spiral blade 13 outside the pneumatic shaft 9 rotates with it, and the rotating spiral blade 13 pushes the deoxidizer in the deoxidizer feeder 8 out of the discharge port 10 of the deoxidizer feeder 8 in small amounts and continuously. At the same time, the deoxidizer discharged from the discharge port 10 will be fully mixed with the copper liquid in the furnace body 1 under the stirring of nitrogen bubbles. In addition, since the exhaust position of the exhaust hole 11 changes continuously with the rotation of the pneumatic shaft 9, the deoxidizer can be mixed into the copper liquid more evenly. It can be seen that the deoxidation equipment of the copper rod casting furnace effectively combines nitrogen deoxidation and deoxidizer deoxidation. On the one hand, the reaction force when the nitrogen is discharged into the furnace body 1 is used to drive the pneumatic shaft 9 to rotate, so as to achieve the purpose of automatically adding a small amount of deoxidizer into the furnace body 1 continuously. On the other hand, the nitrogen discharged into the furnace body 1 can also achieve the effect of stirring and mixing the deoxidizer and the copper liquid, so as to achieve more efficient deoxidation.

[0031] In this exemplary embodiment, Figure 1 and Figure 3 As shown, in order to more easily drive the pneumatic shaft 9 to rotate, a hollow disc-shaped pneumatic disc 27 is provided at the first end of the pneumatic shaft 9, the pneumatic disc 27 is coaxially arranged with the pneumatic shaft 9 and communicated with each other, and the exhaust hole 11 is arranged on the pneumatic disc 27 and arranged along the tangent direction of the pneumatic shaft 9. After such arrangement, the force arm when driving the pneumatic shaft 9 to rotate can be effectively increased, so that the pneumatic shaft 9 can be more easily driven to rotate by the reverse thrust when the nitrogen is discharged.

[0032] In this exemplary embodiment, Figure 2 As shown, in order to facilitate the addition of deoxidizer into the deoxidizer feeder 8, a feeding port 23 is set at the top of the deoxidizer feeder 8; in order to improve the airtightness of the deoxidizer feeder 8, an openable and closable sealing cover 24 is installed on the feeding port 23. By opening the sealing cover 24, deoxidizer can be added to the deoxidizer feeder 8 through the feeding port 23. After the deoxidizer is added, the sealing cover 24 is closed to prevent external air from entering the deoxidizer feeder 8 and the furnace body 1 through the feeding port 23.

[0033] In this exemplary embodiment, Figure 2As shown, the bottom of the deoxidizer feeder 8 is tilted, and a cleaning rack 25 is fixed on the pneumatic shaft 9. The cleaning rack 25 includes a first cleaning section 25-a that fits the inner side wall of the deoxidizer feeder 8 and a second cleaning section 25-b that fits the bottom of the deoxidizer feeder 8. During the rotation of the pneumatic shaft 9, the cleaning rack 25 rotates with the pneumatic shaft 9, and the cleaning rack 25 can scrape off the deoxidizer on the inner side wall and inner bottom of the deoxidizer feeder 8, so as to achieve the purpose of automatically cleaning the inner wall of the deoxidizer feeder 8.

[0034] In this exemplary embodiment, Figure 2 As shown, the second end of the pneumatic shaft 9 is rotatably connected to the nitrogen supply device 12 through a rotating connecting piece 14. Specifically, the rotating connecting piece 14 includes a hollow connecting seat 14-a formed on the deoxidizer feeder 8 and two sealed bearings 14-b arranged in the connecting seat 14-a, the pneumatic shaft 9 is arranged through the connecting seat 14-a, the pneumatic shaft 9 is rotatably connected to the connecting seat 14-a through the two sealed bearings 14-b, and the connecting seat 14-a, the pneumatic shaft 9 and the two sealed bearings 14-b together form an air cavity 14-c, the pneumatic shaft 9 is provided with an air inlet hole 14-d connecting it with the air cavity 14-c, the connecting seat 14-a is provided with an air inlet nozzle 14-e connected with the air cavity 14-c, and the connecting seat 14-a is connected to the nitrogen supply device 12 through the air inlet nozzle 14-e. Such a configuration can not only realize the rotational connection between the pneumatic shaft 9 and the deoxidizer feeder 8, but also input nitrogen from the static air inlet nozzle 14-e into the dynamically rotating pneumatic shaft 9, thereby facilitating the delivery of nitrogen. Of course, in other embodiments, the rotary communication vessel 14 can also be a pneumatic rotary joint well known to those skilled in the art or other transition connection sealing devices capable of inputting nitrogen from a static system to a dynamic rotating system.

[0035] In this exemplary embodiment, Figure 2As shown, a booster 15 is provided at the position of the second end of the pneumatic shaft 9, and the booster 15 is constructed to provide a force in the tangential direction to the pneumatic shaft 9 in a non-contact manner. In this way, it can be ensured that the pneumatic shaft 9 can still be smoothly rotated when the fluidity of the copper liquid deteriorates. Preferably, the booster 15 includes an active blade 15-a and a driven blade 15-b arranged relatively along the axial direction of the pneumatic shaft 9, the active blade 15-a is driven by a motor 15-c, and the driven blade 15-b is fixed on the pneumatic shaft 9. When the active blade 15-a rotates, the airflow is promoted to flow, and a thrust is generated on the driven blade 15-b, and then a force in the tangential direction is generated on the pneumatic shaft 9. In this way, the active blade 15-a and the driven blade 15-b cooperate to effectively provide power for the rotation of the pneumatic shaft 9, and because it is a non-contact power, when power is not required, the unnecessary resistance generated by the booster 15 to the pneumatic shaft 9 can be reduced. In order to improve the power-assisting effect, in this example, the active blades 15-a and the driven blades 15-b are covered with air guides 15-d, which are fixed to the deoxidizer feeder 8 via a first mounting frame 15-e, and the motor 15-c for driving the active blades 15-a is fixedly mounted on the inner wall of the air guide 15-d via a second mounting frame 15-f. Of course, the power-assisting device 15 of the above structure is only an example, and there is no particular restriction on the specific structural form of the power-assisting device 15 as long as it can provide a force in the tangential direction to the pneumatic shaft 9 in a non-contact manner.

[0036] In this exemplary embodiment, Figure 1 As shown, the deoxidation equipment of the copper rod casting furnace also includes a stirring structure, which is fixed to the first end of the pneumatic shaft 9 and rotates synchronously with the pneumatic shaft 9. The setting of the stirring structure can accelerate the mixing efficiency of the deoxidizer discharged from the discharge port 10 and the copper liquid in the furnace body 1. Preferably, the stirring structure includes two stirring brackets 16, and the two stirring brackets 16 are symmetrically arranged on both sides of the pneumatic shaft 9, each stirring bracket 16 includes an L-shaped main bracket 16-a connected to the pneumatic shaft 9 and three sub-brackets 16-b, the first end of the main bracket 16-a is fixed to the pneumatic shaft 9 (for example, welded), and the second end of the main bracket 16-a extends toward the opening direction of the furnace body 1, and the three sub-brackets 16-b are arranged along the length direction of the main bracket 16-a and are welded and fixed to the main bracket 16-a. When the pneumatic shaft 9 rotates, the main bracket 16-a and the auxiliary bracket 16-b rotate together with the pneumatic shaft 9, so that the deoxidizer discharged from the discharge port 10 can be fully mixed into the copper liquid in the furnace body 1 to achieve a better deoxidation effect. Of course, as long as the deoxidizer added to the furnace body 1 can be stirred, there is no particular limitation on the specific structural form of the stirring structure.

[0037] Embodiment 2: Based on the above embodiment 1, Figure 4 , Figure 5 and Figure 6 As shown, the casting furnace includes a furnace cover 6, and an exhaust gap 22 is left between the furnace cover 6 and the furnace body 1 of the casting furnace. The furnace cover 6 and the furnace body 1 are movably connected along the covering direction of the furnace cover 6 through a connecting structure 17 to control the width of the exhaust gap 22. By setting the furnace cover 6, compared with the furnace body 1 in open operation, the contact between the molten copper and the outside air can be reduced, thereby reducing the oxygen content in the molten copper; by leaving an exhaust gap 22 between the furnace cover 6 and the furnace body 1, when nitrogen is filled into the furnace body 1 through the pneumatic shaft 9, the original air in the furnace body 1 can be discharged through the exhaust gap 22, which can ensure that the furnace body 1 maintains a low oxygen content on the one hand, and on the other hand, it can also prevent the furnace body 1 from having too high an air pressure. As shown in FIG. Figure 5 As shown, preferably, the connecting structure 17 includes a connecting pin 17-a, a connecting ear 17-b and a spring 17-c. The first end of the connecting pin 17-a is a rod-shaped structure, and the second end is a ring-shaped structure. The first end of the connecting pin 17-a is provided with a thread. The furnace cover 6 is provided with a first connecting hole 17-d through which the first end of the connecting pin 17-a can move. The connecting ear 17-b is fixedly arranged on the inner wall of the furnace body 1. When the furnace cover 6 is closed, the first end of the connecting pin 17-a passes through the first connecting hole 17-d. Threadedly connected to the connecting ear 17-b, the spring 17-c is sleeved on the second end of the connecting pin 17-a and placed between the connecting ear 17-b and the furnace cover 6. By tightening the connecting pin 17-a, the furnace cover 6 can be pressed against the opening of the furnace body 1. When the connecting pin 17-a is loosened, the furnace cover 6 is lifted up under the elastic force of the spring 17-c, and an exhaust gap 22 is formed between the furnace cover 6 and the opening of the furnace body 1. The exhaust gap 22 can be changed in width as the connecting pin 17-a is screwed to meet different processing requirements.

[0038] In this exemplary embodiment, Figure 4 and Figure 5 As shown, a water tank 19 is provided at the edge of the furnace body 1, and the upper end of the water tank 19 is an open structure. The edge of the furnace cover 6 is provided with a sealing edge 7 extending toward the opening direction of the water tank 19, and the sealing edge 7 extends from the opening of the water tank 19 into the interior of the water tank 19. Specifically, after the sealing edge 7 extends into the water tank 19, a U-shaped channel is formed inside the water tank 19. After a proper amount of water is added to the water tank 19, the water surface submerges the sealing edge 7 of the furnace cover 6. As more and more nitrogen is filled into the furnace body 1, the air pressure in the furnace body 1 gradually increases, and the air in the furnace body 1 can be discharged into the water tank 19 from the exhaust gap 22 between the furnace cover 6 and the furnace body 1. The air emerges in the water tank 19 in the form of bubbles. When it is no longer necessary to fill the furnace body 1 with nitrogen for deoxygenation, the water in the water tank 19 can block external air from entering the furnace body 1 from the exhaust gap 22 between the furnace cover 6 and the furnace body 1, thereby further avoiding contact between the copper liquid in the furnace body 1 and the external air.

[0039] In this exemplary embodiment, Figure 4 and Figure 8 As shown, the deoxidation equipment of the copper rod casting furnace also includes a slag remover 20, which is an annular component. A slag discharge port 21 is formed between the inner hole of the slag remover 20 and the outer wall of the pneumatic shaft 9. The outer diameter of the slag remover 20 is adapted to the inner diameter of the furnace body 1, and the downward end of the slag remover 20 is a cone surface 20-a. When a deoxidizer is used to react with oxygen in the copper liquid, light oxides are generated. Under the action of buoyancy, these oxides come to the surface of the copper liquid along the cone surface 20-a of the slag remover 20 and the slag discharge port 21 to form slag. At the same time, nitrogen emerges from the slag discharge port 21 in the form of bubbles. Under the push of the bubbles, these slags are pushed to the edge of the furnace body 1 to form a roughly annular slag ring. With the production of copper rods, the amount of copper liquid in the furnace body 1 gradually decreases, the copper liquid level decreases, and the slag ring is placed on the slag remover 20, thereby achieving the purpose of removing slag in the copper liquid. In order to improve the slag collection effect, an annular slag trough 20-b is arranged on the top of the slag remover 20, and a drainage hole 20-c is arranged at the bottom of the slag trough 20-b. The drainage hole 20-c extends downward to the conical surface 20-a of the slag remover 20. The slag trough 20-b of the slag remover 20 can better intercept the slag, and the drainage hole 20-c can discharge part of the copper liquid in the slag trapped in the slag trough 20-b to prevent the copper liquid from mixing into the slag.

[0040] In this exemplary embodiment, Figure 6 As shown, the slag remover 20 is connected to the furnace cover 6 of the casting furnace through the second connection structure 18. In this way, the slag remover 20 can be taken out synchronously with the opening of the furnace cover 6, saving the operation of taking out the slag remover 20. Specifically, the second connection structure 18 includes a connecting rod 18-a and a connecting sleeve 18-b, the first end of the connecting rod 18-a is connected to the slag remover 20, the connecting sleeve 18-b is arranged on the outside of the furnace cover 6, and the furnace cover 6 is provided with a second connecting hole 18-c, and the second end of the connecting rod 18-a is movable through the second connecting hole 18-c of the furnace cover 6 and then connected to the connecting sleeve 18-b. With such arrangement, when the production of copper rods is completed, the furnace cover 6 needs to be opened. When the furnace cover 6 is opened, an upward pulling force is applied to the connecting sleeve 18-b through a lifting device (not shown), and the slag remover 20 subjected to the pulling force moves upward relative to the furnace cover 6. As the furnace cover 6 moves, the slag on the slag remover 20 is squeezed by the furnace cover 6 and the slag remover 20. This not only reduces the volume of the slag, but also clamps and fixes the slag to prevent the slag from falling when the furnace cover 6 is moved.

[0041] In this exemplary embodiment, Figure 6As shown, in order to facilitate the assembly, disassembly and replacement of the connecting rod 18-a, the furnace cover 6, the connecting sleeve 18-b and the slag remover 20, a limiting head 18-d is provided at the first end of the connecting rod 18-a, and a step-type through hole 18-e adapted to the first end of the connecting rod 18-a is provided through the slag remover 20. When the first end of the connecting rod 18-a passes through the step-type through hole 18-e, the limiting head 18-d of the connecting rod 18-a is limited on the step surface of the step-type through hole 18-e. In addition, a third connecting hole 18-f is provided through the connecting sleeve 18-b, and a thread is provided at the second end of the connecting rod 18-a. The second end of the connecting rod 18-a is movable through the third connecting hole 18-f and connected to a nut 18-g. After such a configuration, the height of the slag remover 20 in the furnace body 1 also becomes adjustable.

[0042] Further, such as Figure 7 As shown, in order to facilitate the removal of the slag in the slag remover 20, two gate knives 26 are fixedly provided at the bottom of the furnace cover 6. The two gate knives 26 are symmetrically arranged on both sides of the pneumatic shaft 9. When the slag remover 20 is pulled upward relative to the furnace cover 6 through the connecting sleeve 18-b, the gate knives 26 will cut the slag ring on the slag remover 20 into two halves, forming two semi-annular slag rings. After that, the operator lifts the furnace cover 6 upwards and can easily remove the slag ring on the slag remover 20.

[0043] In order to improve the insulation effect of the casting furnace, Figure 4 As shown, the furnace body 1 of the casting furnace includes a first furnace body 1-a and a second furnace body 1-b arranged in the first furnace body 1-a. The upper ends of the first furnace body 1-a and the second furnace body 1-b are both open structures. The second furnace body 1-b is suitable for containing molten copper. An insulation layer 1-c is filled between the first furnace body 1-a and the second furnace body 1-b. The insulation layer 1-c is made of insulation materials such as rock wool. A crystallizer 2 is arranged at the bottom of the second furnace body 1-b. A cooling device 3 is arranged outside the crystallizer 2. The cooling device 3 has a cooling water inlet 4 and a cooling water outlet 5. When the copper liquid passes through the crystallizer 2, it is cooled to form a copper rod to be pulled out.

[0044] It should be noted that the components of various embodiments of the present invention can be interchangeable as long as they can play the corresponding roles.

[0045] Working principle: First, install the deoxidizer feeder 8 on the furnace cover 6, and fix the furnace cover 6 to the opening of the furnace body 1 through a connecting structure 17. By rotating the connecting pin 17-a in the connecting structure 17, the size of the exhaust gap 22 between the furnace cover 6 and the furnace body 1 can be controlled. Next, open the sealing cover 24 of the deoxidizer feeder 8, and add deoxidizer to the feeder through the feeding port 23. After the feeding is completed, close the sealing cover 24 to prevent external air from entering the deoxidizer feeder 8 and the furnace body 1. Then, start the nitrogen supply device 12, and the nitrogen supply device 12 uses the rotating connecting tube 14 to inject nitrogen into the pneumatic shaft 9. The nitrogen enters the copper liquid in the furnace from the exhaust hole 11 of the pneumatic shaft 9. Since the exhaust hole 11 is arranged along the tangential direction of the pneumatic shaft 9, the reverse thrust of the nitrogen causes the pneumatic shaft 9 to rotate. The rotation of the pneumatic shaft 9 drives the spiral blade 13 to rotate together, and the deoxidizer is pushed out from the feeder at the same time, so that the deoxidizer can be added to the copper liquid in a small amount and continuously. Under the stirring of the nitrogen bubble, the deoxidizer is fully mixed in the copper liquid, and due to the change of the position of the exhaust hole 11, the uniform distribution of the deoxidizer is promoted. In order to improve the sealing between the furnace body 1 and the furnace cover 6 and facilitate exhaust, an appropriate amount of water is added to the water tank 19 so that the water surface covers the edge sealing 7 of the furnace cover 6. When nitrogen is gradually filled into the furnace body 1, the internal air pressure increases, and the air in the furnace body 1 enters the water tank 19 through the exhaust gap 22 and emerges in the form of bubbles. When the nitrogen filling and deoxidation are stopped, the water in the water tank 19 can block the entry of external air, further isolating the copper liquid in the furnace body 1 from the outside air. The deoxidizer reacts with the oxygen in the copper liquid to generate light oxides, which reach the surface of the copper liquid due to buoyancy and appear in the form of scum. Nitrogen emerges from the slag discharge port 21 in the form of bubbles, and drives the slag to move to the edge of the furnace body 1 to form an annular slag ring. Finally, the deoxygenated molten copper liquid flows into the crystallizer 2 through the pipeline, and is rapidly cooled and solidified with the help of the cooling device 3, thereby forming an outer hard shell of the copper rod. During the continuous copper rod production process, the amount of copper liquid in the furnace body 1 gradually decreases, the copper liquid level drops, and the slag ring is placed on the slag remover 20 to achieve the purpose of removing slag in the copper liquid.

[0046] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A deoxidation device for a copper rod casting furnace, used for removing oxygen from a furnace body (1) of a casting furnace, characterized in that: The invention comprises a deoxidizer feeder (8) and a hollow pneumatic shaft (9), wherein the deoxidizer feeder (8) has a discharge port (10) extending into the furnace body (1); the pneumatic shaft (9) is rotatably arranged in the discharge port (10) of the deoxidizer feeder (8); a first end of the pneumatic shaft (9) is inserted into the furnace body (1) and is provided with an exhaust hole (11) arranged along the tangent direction of the pneumatic shaft (9); a second end of the pneumatic shaft (9) is connected to a nitrogen supply device (12); a spiral blade (13) is fixedly provided on the outer wall of the pneumatic shaft (9); a spiral discharge channel is formed between the spiral blade (13) and the inner wall of the discharge port (10) of the deoxidizer feeder (8); The casting furnace comprises a furnace cover (6), an exhaust gap (22) is left between the furnace cover (6) of the casting furnace and the furnace body (1) of the casting furnace, and the furnace cover (6) and the furnace body (1) are movably connected along the covering direction of the furnace cover (6) via a connecting structure (17) to control the width of the exhaust gap (22); A water storage tank (19) is provided at the edge of the furnace body (1), the upper end of the water storage tank (19) is an open structure, and an edge seal (7) extending in the direction of the opening of the water storage tank (19) is provided at the edge of the furnace cover (6), the edge seal (7) extending from the opening of the water storage tank (19) into the interior of the water storage tank (19).

2. The deoxidation equipment for copper rod casting furnace according to claim 1, characterized in that: The second end of the pneumatic shaft (9) is rotatably connected to the nitrogen supply device (12) via a rotating connecting piece (14).

3. The deoxidation equipment for copper rod casting furnace according to claim 1, characterized in that: A power assist device (15) is provided at a position located at the second end of the pneumatic shaft (9), and the power assist device (15) is configured to provide a force in a tangential direction to the pneumatic shaft (9) in a non-contact manner.

4. The deoxidation equipment for copper rod casting furnace according to claim 1, characterized in that: It also comprises a stirring structure, wherein the stirring structure is fixed to the first end of the pneumatic shaft (9) and rotates synchronously with the pneumatic shaft (9).

5. The deoxidation equipment for copper rod casting furnace according to claim 1, characterized in that: It also includes a slag remover (20), which is an annular component. A slag discharge port (21) is formed between the inner hole of the slag remover (20) and the outer wall of the pneumatic shaft (9). The outer diameter of the slag remover (20) is matched to the inner diameter of the furnace body (1), and the downward end of the slag remover (20) is a conical surface (20-a).

6. The deoxidation equipment for copper rod casting furnace according to claim 5, characterized in that: The slag remover (20) is connected to the furnace cover (6) of the casting furnace via a second connection structure (18).

Images