A copper solution degassing device

Abstract

The utility model discloses a copper liquid degassing device, including box, main pipeline, air inlet pipe, hollow graphite shaft and porous foam ceramic pipe, the box is the hollow cuboid structure of horizontal longitudinal arrangement, and is horizontally vertically provided with main pipeline in its inside middle position, the air inlet pipe is horizontally vertically provided with in the right side of box relative to main pipeline position, and the left end of air inlet pipe vertically extends to the inside of box, and with the right end face of main pipeline corresponding position sealed communication, the hollow graphite shaft is still horizontally vertically provided with in the left side of box relative to main pipeline position, and the right end of hollow graphite shaft vertically extends to the inside of box, and with the left end face of main pipeline corresponding position sealed communication, still incline downward sealed communication and be provided with porous foam ceramic pipe in the left end of hollow graphite shaft to the outside direction, and still be provided with several air holes I that open and lead to the outside in the outer circumferential surface of porous foam ceramic pipe along its circumferential direction even distribution interval vertical embedding, the utility model has improved copper liquid degassing efficiency.

Description

Technical Field

[0001] This utility model relates to the field of non-ferrous metal smelting, specifically to a copper liquid degassing device. Background Technology

[0002] In the production of horizontal continuous casting copper strips and upward drawing copper rods, degassing of the molten copper is a crucial step determining product quality. Current copper degassing technologies primarily rely on physical covering layers (such as charcoal or graphite flakes) to isolate oxygen, and degassing is achieved through the injection of inert gases (such as nitrogen). For example, the upward drawing process of Jiangxi Zhenying Intelligent Technology Co., Ltd. uses a charcoal covering layer and CO gas protection. In addition, some technologies employ vacuum degassing or dynamic pressure control (such as periodic pressurization / depressurization) to optimize the flow of the molten copper.

[0003] However, existing copper liquid degassing devices generally suffer from the following problems: 1) Traditional inert gas injection methods inject gas through a single nozzle or pipe, resulting in large bubble sizes (millimeter-level) and short residence times, leading to insufficient gas-liquid contact area and consequently low gas-liquid mass transfer efficiency; 2) Charcoal reduction methods can only reduce oxygen content to 20 ppm and cannot remove dissolved hydrogen, resulting in incomplete deoxygenation; 3) The graphite protective layer is easily broken and enters the copper liquid, causing internal defects in the copper rod; 4) Metal stirring components are prone to corrosion at high temperatures, resulting in short equipment lifespan and frequent replacements; 5) Vacuum degassing systems require complex equipment and have high energy consumption; 6) Dynamic pressure control requires precise adjustment, making operation difficult. Therefore, these problems urgently need to be solved. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a copper liquid degassing device, which, through the coordinated operation of stirring blades, porous foam ceramic tubes and ultrasonic generator, controls the oxygen content in copper liquid to within 5 ppm, thus significantly improving the copper liquid degassing efficiency.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: The innovative feature of this copper liquid degassing device is that it includes a housing, a main pipe, an air inlet pipe, a hollow graphite shaft, and a porous foam ceramic tube. The housing is a horizontally and longitudinally arranged hollow cuboid structure, with a main pipe horizontally and longitudinally arranged in the middle of its interior. An air inlet pipe is horizontally and vertically arranged on the right side of the housing relative to the main pipe, with its left end extending vertically into the interior of the housing and sealingly connected to the right end of the main pipe. A hollow graphite shaft is horizontally and vertically arranged on the left side of the housing relative to the main pipe, with its right end extending vertically into the interior of the housing and sealingly connected to the left end of the main pipe. A porous foam ceramic tube is also inclined downwards and sealed to the left end of the hollow graphite shaft, and several air holes (I) are evenly distributed and vertically embedded and opened along the circumference of the porous foam ceramic tube.

[0006] Preferably, the front and rear ends of the main pipe are sealed and fixedly connected to the front and rear inner surfaces of the housing, respectively, and its upper and lower end faces are spaced apart from the inner top and inner bottom surfaces of the housing, respectively, and its right end face is spaced apart from the right inner side surface of the housing; the middle part of the main pipe is hollow relative to the area covered by the hollow graphite shaft, and its front and rear ends are solid, thereby ensuring that nitrogen entering through the air inlet pipe can directly enter the hollow graphite shaft through the main pipe.

[0007] Preferably, the right end of the hollow graphite shaft is horizontally coaxial with the left end of the air intake pipe, and the inner diameter of the hollow graphite shaft is smaller than the inner diameter of the main pipe and larger than the inner diameter of the air intake pipe.

[0008] Preferably, the right end of the air inlet pipe is sealed and connected to a nitrogen source, and nitrogen enters the porous foam ceramic tube through the air inlet pipe.

[0009] Preferably, the porous foam ceramic tube is made of silicon carbide ceramic or alumina ceramic, and its right end outer diameter matches the left end outer diameter of the hollow graphite shaft, and the two are coaxially sealed and connected; the diameter of each of the air pores I is 50-200μm, and the porosity of the porous foam ceramic tube is ensured to be ≥80%.

[0010] Preferably, it also includes an inner tube and a rotating shaft; the left end of the porous foam ceramic tube extends downwards and tilts to the left, and the angle between it and the hollow graphite shaft is 45-60°; the left end face of the porous foam ceramic tube is closed, and a rotating shaft is coaxially rotatably mounted on it; a channel I is coaxially and vertically embedded on one side of the rotating shaft near the porous foam ceramic tube, and a through hole matching the channel I is coaxially and vertically embedded on the left end face of the porous foam ceramic tube relative to the position of the channel I; and a coaxially sleeved device is also provided inside the porous foam ceramic tube. The device has an inner tube, and nitrogen gas entering through a hollow graphite shaft enters the interior of the inner tube and the annular interlayer formed by the porous foam ceramic tube and the inner tube. The length of the inner tube is the same as the length of the porous foam ceramic tube, and its outer diameter is smaller than the inner diameter of the porous foam ceramic tube, and matches the diameter of the through hole. The left end of the inner tube is coaxially sealed and fitted into the through hole, and is coaxially sealed and fixedly connected to the inner surface of the left end of the porous foam ceramic tube, and does not interfere with the rotation of the shaft around the porous foam ceramic tube. Thus, the channel I is sealed and connected to the interior of the inner tube through the through hole.

[0011] Preferably, the device further includes stirring blades; several stirring blades are also arranged at intervals along the circumferential direction on the left side of the outer circumferential surface of the rotating shaft. Each stirring blade is a hollow structure made of silicon carbide ceramic or alumina ceramic, and its fixed end is fixedly connected to the corresponding position of the outer circumferential surface of the rotating shaft, ensuring that the inclination direction of all stirring blades is consistent; a channel II is also embedded radially and vertically on the outer circumferential surface of the rotating shaft relative to the position of each stirring blade, and the interior of each stirring blade is connected to the channel I through the channel II, thereby allowing nitrogen gas entering through the inner tube to be introduced into the corresponding stirring blade; several air holes II are also arranged at intervals along the circumferential direction on the upper surface of each stirring blade near the rotating shaft, and the inclination direction of each air hole II is consistent, allowing nitrogen gas in the corresponding stirring blade to be discharged through the air holes II, thereby driving the stirring blade to rotate around the rotating shaft.

[0012] Preferably, it further includes a support, pipe I, an ultrasonic generator, pipe II, and stiffening plates; pipe II is vertically arranged inside the housing at the midpoint of the upper end face of the main pipe, the lower end of pipe II is sealed and connected to the hollow part of the main pipe, and its upper end extends vertically upward out of the upper surface of the housing and is sealed and connected to the midpoint of the lower end face of the horizontally arranged pipe I; supports are vertically fixed on the upper surface of the housing on the left and right sides of pipe I, and the two ends of pipe I are respectively sealed and fixed to the corresponding positions of the inner sides of the supports. The pipe I is connected and then supported and fixed by a bracket; the right end of the pipe I extends vertically out of the right side of the bracket and is sealed and connected to the output end of the ultrasonic generator; the fixed end of the ultrasonic generator is fixedly installed on the upper surface of the box relative to the right side of the bracket by a stiffener. After the porous foam ceramic tube is inserted into the copper liquid, the ultrasonic generator generates high-frequency vibration, which then passes through the pipe I, pipe II, main pipe, hollow graphite shaft, pore I of the porous foam ceramic tube, and pore II of the stirring blade in sequence, inducing cavitation effect in the copper liquid.

[0013] Preferably, the frequency of the ultrasonic generator is 20–40 kHz, and its power density is 1–5 W / cm². 2 .

[0014] The beneficial effects of this utility model are:

[0015] (1) This utility model controls the oxygen content in copper liquid to within 5ppm through the coordinated use of stirring blades, porous foam ceramic tubes and ultrasonic generator, which significantly improves the degassing efficiency of copper liquid.

[0016] (2) By combining the ultrasonic cavitation effect, this utility model not only accelerates the merging and rising of bubbles and improves the degassing rate, but also saves energy and reduces nitrogen consumption compared with traditional vacuum degassing.

[0017] (3) The porous foam ceramic tube of this utility model is provided with micron-sized pores I, which can refine nitrogen bubbles, increase the gas-liquid contact area, and shorten the degassing time when combined with ultrasound.

[0018] (4) This utility model uses high-temperature resistant ceramic materials, which extends the service life and reduces maintenance costs. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of a copper liquid degassing device according to the present invention.

[0021] Figure 2 This is a schematic diagram from another perspective of the copper liquid degassing device of this utility model.

[0022] Figure 3 for Figure 1 An enlarged schematic diagram of part A in the middle.

[0023] Among them, 1-box body; 2-air inlet pipe; 3-main pipe; 4-support; 5-pipe I; 6-ultrasonic generator; 7-pipe II; 8-rib plate; 9-hollow graphite shaft; 10-porous foam ceramic tube; 11-air hole I; 12-stirring blade; 13-air hole II. Detailed Implementation

[0024] The technical solution of this utility model will be clearly and completely described below through specific embodiments.

[0025] This utility model discloses a copper liquid degassing device, comprising a housing 1, a main pipe 3, an air inlet pipe 2, a hollow graphite shaft 9, and a porous foam ceramic tube 10; the specific structure is as follows: Figures 1-3 As shown, the box 1 is a hollow cuboid structure arranged horizontally and longitudinally, and a main pipe 3 is arranged horizontally and longitudinally in the middle of its interior; an air inlet pipe 2 is arranged horizontally and vertically on the right side of the box 1 relative to the position of the main pipe 3, and the left end of the air inlet pipe 2 extends vertically into the interior of the box 1 and is sealed and connected to the right end of the main pipe 3; wherein, the right end of the air inlet pipe 2 is sealed and connected to the nitrogen source.

[0026] like Figures 1-3 As shown, the front and rear ends of the main pipe 3 are sealed and fixedly connected to the front and rear inner surfaces of the housing 1, respectively, and its upper and lower end faces are spaced apart from the inner top and inner bottom surfaces of the housing 1, respectively, and its right end face is spaced apart from the right inner side surface of the housing 1; the middle part of the interior of the main pipe 3 is a hollow part relative to the area covered by the hollow graphite shaft 9, and its front and rear ends are solid parts, thereby ensuring that the nitrogen gas entering through the air inlet pipe 2 can directly enter the hollow graphite shaft 9 through the main pipe 3.

[0027] This utility model also features a hollow graphite shaft 9, horizontally and vertically positioned on the left side of the housing 1 relative to the main pipe 3, such as... Figures 1-3 As shown, the right end of the hollow graphite shaft 9 extends vertically into the interior of the housing 1 and is sealed and connected to the left end of the main pipe 3 at the corresponding position; the right end of the hollow graphite shaft 9 is horizontally coaxially arranged with the left end of the air inlet pipe 2, and the inner diameter of the hollow graphite shaft 9 is smaller than the inner diameter of the main pipe 3 and larger than the inner diameter of the air inlet pipe 2.

[0028] This utility model has a porous foam ceramic tube 10 that is inclined and sealed downwards at the left end of the hollow graphite shaft 9, and several air holes I11 are evenly distributed and vertically embedded and opened along the outer circumference of the porous foam ceramic tube 10; such as Figures 1-3 As shown, the porous foam ceramic tube 10 is made of silicon carbide ceramic or alumina ceramic, and its right end outer diameter matches the left end outer diameter of the hollow graphite shaft 9, and the two are coaxially sealed and connected; the diameter of each pore I11 is 50-200μm, and the porosity on the porous foam ceramic tube 10 is ensured to be ≥80%.

[0029] like Figures 1-3 As shown, the left end of the porous foam ceramic tube 10 extends downwards and tilts to the left, with an angle of 45° to 60° between it and the hollow graphite shaft 9. The left end face of the porous foam ceramic tube 10 is closed, and a rotating shaft is coaxially mounted on it. A channel I is coaxially and vertically embedded on one side of the rotating shaft near the porous foam ceramic tube 10, and a through hole matching the channel I is coaxially and vertically embedded on the left end face of the porous foam ceramic tube 10 relative to the position of the channel I. An inner tube is coaxially sleeved inside the porous foam ceramic tube 10. Nitrogen gas entering through the hollow graphite shaft 9 enters the inner tube and the annular interlayer formed by the porous foam ceramic tube 10 and the inner tube. The length of the inner tube is the same as the length of the porous foam ceramic tube 10, and its outer diameter is smaller than the inner diameter of the porous foam ceramic tube 10, and matches the diameter of the through hole. The left end of the inner tube is coaxially sealed and fitted into the through hole, and is coaxially sealed and fixedly connected to the inner surface of the left end of the porous foam ceramic tube 10, and does not interfere with the rotation of the shaft around the porous foam ceramic tube 10. Thus, the channel I is sealed and connected to the inside of the inner tube through the through hole.

[0030] like Figures 1-3 As shown, several stirring blades 12 are arranged at intervals along the circumferential direction on the left side of the outer circumferential surface of the rotating shaft. Each stirring blade 12 is a hollow structure made of silicon carbide ceramic or alumina ceramic, and its fixed end is fixedly connected to the corresponding position on the outer circumferential surface of the rotating shaft, ensuring that the inclination direction of all stirring blades 12 is consistent. A channel II is also embedded radially and vertically on the outer circumferential surface of the rotating shaft relative to the position of each stirring blade 12, and the interior of each stirring blade 12 is connected to the channel I through the channel II, so that nitrogen gas entering through the inner tube is introduced into the corresponding stirring blade 12. Several air holes II 13 are also embedded at intervals along the circumferential direction on the upper surface of each stirring blade 12 near the rotating shaft, and the inclination direction of each air hole II 13 is consistent, so that nitrogen gas in the corresponding stirring blade 12 is discharged through the air hole II 13, thereby driving the stirring blade 12 to rotate around the rotating shaft.

[0031] In this utility model, a pipe II 7 is vertically installed inside the housing 1 at the middle position of the upper end face of the main pipe 3, such as... Figures 1-3 As shown, the lower end of pipe II 7 is sealed and connected to the hollow part of the main pipe 3, and its upper end extends vertically upward from the upper surface of the box 1, and is sealed and connected to the middle position of the lower end face of the horizontally arranged pipe I 5; on the upper surface of the box 1, supports 4 are respectively vertically fixed on the left and right sides of the pipe I 5, and the two ends of the pipe I 5 are respectively sealed and fixedly connected to the corresponding positions of the inner side of the corresponding support 4, thereby supporting and fixing the pipe I 5 through the supports 4; the right end of the pipe I 5 extends vertically out to the right side of the right support 4, and connects with the output of the ultrasonic generator 6. The outlet is sealed and connected; the fixed end of the ultrasonic generator 6 is fixedly installed on the upper surface of the housing 1 relative to the right side of the right-side bracket 4 via the stiffener 8. After the porous foam ceramic tube 10 is inserted into the copper liquid, the ultrasonic generator 6 generates high-frequency vibration, which then passes through pipe I 5, pipe II 7, main pipe 3, hollow graphite shaft 9, pore I 11 of the porous foam ceramic tube 10, and pore II 13 of the stirring blade 12, inducing cavitation effect in the copper liquid; wherein, the frequency of the ultrasonic generator 6 is 20-40kHz, and its power density is 1-5W / cm³. 2 .

[0032] The working principle of this utility model:

[0033] First, the porous foam ceramic tube 10 is inserted into the copper liquid. Then, nitrogen gas enters the hollow graphite shaft 9 through the air inlet pipe 2. Part of the nitrogen gas enters the area inside the porous foam ceramic tube 10 relative to the outer area of ​​the inner tube, and is then dispersed into nitrogen bubbles with a diameter of 50-200 μm through the micron-sized pores I 11. The other part of the nitrogen gas enters the inner area of ​​the porous foam ceramic tube 10, and then escapes through the pores II 13 of the stirring blade 12, thereby driving the stirring blade 12 to rotate and accelerating the bubbles to float.

[0034] Meanwhile, the ultrasonic generator 6 generates high-frequency vibrations, which induce cavitation in the copper liquid, causing dissolved gases to precipitate and adsorb onto the surface of nitrogen bubbles; in addition, the ultrasonic shear force can cause nitrogen bubbles to merge into larger sizes, thereby accelerating their upward movement.

[0035] The beneficial effects of this utility model are:

[0036] (1) This utility model uses the coordinated operation of stirring blade 12, porous foam ceramic tube 10 and ultrasonic generator 6 to control the oxygen content in copper liquid to within 5ppm, which significantly improves the degassing efficiency of copper liquid.

[0037] (2) By combining the ultrasonic cavitation effect, this utility model not only accelerates the merging and rising of bubbles and improves the degassing rate, but also saves energy and reduces nitrogen consumption compared with traditional vacuum degassing.

[0038] (3) The porous foam ceramic tube 10 of this utility model is provided with micron-sized pores I11, which can refine nitrogen bubbles, increase the gas-liquid contact area, and shorten the degassing time when combined with ultrasound.

[0039] (4) This utility model uses high-temperature resistant ceramic materials, which extends the service life and reduces maintenance costs.

[0040] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the concept and scope of the present utility model. Without departing from the design concept of the present utility model, all modifications and improvements made by those skilled in the art to the technical solutions of the present utility model should fall within the protection scope of the present utility model. The technical content for which protection is sought in the present utility model has been fully recorded in the technical requirements.

Claims

1. A copper liquid degassing device, characterized in that: The device includes a housing, a main pipe, an air inlet pipe, a hollow graphite shaft, and a porous foam ceramic tube. The housing is a horizontally and longitudinally arranged hollow cuboid structure, with a main pipe horizontally and longitudinally located in the middle of its interior. An air inlet pipe is horizontally and vertically located on the right side of the housing relative to the main pipe, with its left end extending vertically into the interior of the housing and sealingly connected to the right end of the main pipe. A hollow graphite shaft is horizontally and vertically located on the left side of the housing relative to the main pipe, with its right end extending vertically into the interior of the housing and sealingly connected to the left end of the main pipe. A porous foam ceramic tube is also inclined downwards and sealed to the left end of the hollow graphite shaft, with several air holes (I) evenly distributed and vertically embedded and penetrated along its circumference.

2. The copper liquid degassing device according to claim 1, characterized in that: The front and rear ends of the main pipe are respectively sealed and fixedly connected to the front and rear inner surfaces of the box, and its upper and lower end faces are respectively spaced apart from the inner top and inner bottom surfaces of the box, and its right end face is spaced apart from the right inner side surface of the box; the middle part of the main pipe is hollow relative to the area covered by the hollow graphite shaft, and its front and rear ends are solid parts, thereby ensuring that the nitrogen gas entering through the air inlet pipe can directly enter the hollow graphite shaft through the main pipe.

3. The copper liquid degassing device according to claim 1, characterized in that: The right end of the hollow graphite shaft is horizontally coaxial with the left end of the air intake pipe, and the inner diameter of the hollow graphite shaft is smaller than the inner diameter of the main pipe and larger than the inner diameter of the air intake pipe.

4. The copper liquid degassing device according to claim 1, characterized in that: The right end of the air inlet pipe is sealed and connected to a nitrogen source, and nitrogen enters the porous foam ceramic tube through the air inlet pipe.

5. The copper liquid degassing device according to claim 1, characterized in that: The porous foam ceramic tube is made of silicon carbide ceramic or alumina ceramic, and its right end outer diameter matches the left end outer diameter of the hollow graphite shaft, and the two are coaxially sealed and connected; the diameter of each of the air pores I is 50 to 200 μm, and the porosity of the porous foam ceramic tube is ensured to be ≥80%.

6. The copper liquid degassing device according to claim 5, characterized in that: It also includes an inner tube and a rotating shaft; the left end of the porous foam ceramic tube extends downwards and tilts to the left, with an angle of 45-60° between it and the hollow graphite shaft; the left end face of the porous foam ceramic tube is closed, and a rotating shaft is rotatably mounted on it; a channel I is perpendicularly embedded in the side of the rotating shaft near the porous foam ceramic tube, and a through hole matching the channel I is perpendicularly embedded in the left end face of the porous foam ceramic tube relative to the position of the channel I; an inner tube is also axially sleeved inside the porous foam ceramic tube. Nitrogen gas, entering through a hollow graphite shaft, enters the inner tube and the annular interlayer formed by the porous foam ceramic tube and the inner tube. The length of the inner tube is the same as that of the porous foam ceramic tube, and its outer diameter is smaller than that of the porous foam ceramic tube, matching the diameter of the through hole. The left end of the inner tube is coaxially sealed and fitted into the through hole, and is coaxially sealed and fixedly connected to the inner surface of the left end of the porous foam ceramic tube, without interfering with the rotation of the shaft around the porous foam ceramic tube. Thus, the channel I is sealed and connected to the interior of the inner tube through the through hole.

7. A copper liquid degassing device according to claim 6, characterized in that: It also includes stirring blades; on the left side of the outer circumference of the rotating shaft, several stirring blades are arranged at intervals along the circumferential direction. Each stirring blade is a hollow structure made of silicon carbide ceramic or alumina ceramic, and its fixed end is fixedly connected to the corresponding position of the outer circumference of the rotating shaft, ensuring that the inclination direction of all stirring blades is consistent; a channel II is also embedded radially and vertically on the outer circumference of the rotating shaft relative to the position of each stirring blade, and the interior of each stirring blade is connected to the channel I through the channel II, so that nitrogen gas entering through the inner tube is introduced into the corresponding stirring blade; on the upper surface of each stirring blade near the rotating shaft, several air holes II are also embedded at intervals along the circumferential direction, and the inclination direction of each air hole II is consistent, so that nitrogen gas in the corresponding stirring blade is discharged through the air holes II, thereby driving the stirring blade to rotate around the rotating shaft.

8. The copper liquid degassing device according to claim 1, characterized in that: It also includes a support frame, pipe I, an ultrasonic generator, pipe II, and stiffening plates; inside the housing, pipe II is vertically installed at the midpoint of the upper end face of the main pipe, with its lower end sealed to the hollow portion of the main pipe, and its upper end extending vertically upwards out of the upper surface of the housing and sealed to the midpoint of the lower end face of the horizontally arranged pipe I; on the upper surface of the housing, supports are vertically fixed on the left and right sides of pipe I, and the two ends of pipe I are respectively sealed and fixedly connected to the corresponding positions on the inner sides of the supports. The pipe I is then supported and fixed by a bracket; the right end of the pipe I extends vertically out of the right side of the bracket and is sealed and connected to the output end of the ultrasonic generator; the fixed end of the ultrasonic generator is fixedly installed on the upper surface of the box relative to the right side of the bracket by a stiffener. After the porous foam ceramic tube is inserted into the copper liquid, high-frequency vibration is generated by the ultrasonic generator, and then the vibration is generated in sequence through the pipe I, pipe II, main pipe, hollow graphite shaft, pore I of the porous foam ceramic tube, and pore II of the stirring blade, thus inducing cavitation effect in the copper liquid.

9. A copper liquid degassing device according to claim 8, characterized in that: The frequency of the ultrasonic generator is 20-40 kHz, and the power density thereof is 1-5 W / cm 2 .

Images