An air agitated electrolytic cell

Abstract

The application discloses an air-stirring electrolytic tank, which comprises a tank body, a tank cover covering the tank body, a plurality of arc-shaped side plates surrounding the side wall of the tank body, a plurality of positioning structures arranged on the bottom wall in the tank body, a space above the positioning structures as a central electroplating area, the air inlet directions of a plurality of air inlets avoiding the central electroplating area, and a waste gas outlet arranged on the top of the tank cover. The air-stirring electrolytic tank can drive the electrolyte to rotate in different directions, avoid the electrolyte in the tank from rising to generate bubbles, and avoid the gas from directly reaching the electrode plate to generate bubbles, so that the electrolyte supplement effect of the electrode plate is improved, the adhesion effect of copper on the electrode plate is improved, and the quality of the prepared electrolytic copper foil is ensured. The electrolyte is prevented from evaporating or volatilizing too fast through the tank cover, and the evaporated waste gas can be discharged through the waste gas outlet on the top of the tank cover. The plurality of positioning structures can simultaneously fix a plurality of electrode plates, so that the effect of simultaneously preparing a plurality of electrolytic copper foils is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of copper foil manufacturing equipment, in particular to an air stirring electrolytic cell. BACKGROUND

[0002] Generally, when preparing electrolytic copper foil in the laboratory, a small beaker is used as a stirring container, and a magnetic stirring method is used to heat and stir the electrolyte in the small beaker. Since the commonly used beaker is small in volume, the prepared electrolytic copper foil is small in size, and it is difficult to test important parameters such as mechanical properties and surface quality of the electrolytic copper foil of this size. Using a beaker as an electrolytic cell, a central rod is usually used as a cathode rod, and a phosphor copper belt is used as an anode. During the electrolysis process, the electrode distance is easily changed, resulting in different thicknesses of electrolytic copper foil in different areas. Moreover, using a beaker as an electrolytic cell can usually only prepare one electrolytic copper foil at a time, and the reproducibility of the electrolytic copper foil prepared by repeated tests is poor.

[0003] To prepare a larger size (such as 300mm wide and 500mm long) electrolytic copper foil with good thickness uniformity and reproducibility, a larger volume (such as 20L) container is needed. At this time, using a laboratory magnetic stirrer to heat and stir the electrolyte is not feasible. To solve the problem of electrolyte fluidity, a gas stirring device is usually used for stirring. The existing gas stirring device generally uses a bottom gas inlet method to achieve stirring effect. With the bottom gas inlet method, the gas flow gradually rises from the bottom to the top of the electrolyte. When the gas rises, part of it will dissolve in the electrolyte, and the undissolved part will form bubbles. The bubbles of the electrolyte between the two electrode plates can easily cause excessive resistance and uneven copper ion concentration. The bubbles of the electrolyte on the cathode plate can cause poor electrolyte replenishment and reduced copper adhesion, making it difficult to obtain high-quality ultra-thin electrolytic copper foil. SUMMARY

[0004] Therefore, the technical problem to be solved by the present application is the defect that the existing air stirring device for making copper foil uses a bottom gas inlet method, resulting in more electrolyte bubbles near the electrode plate and the inability to simultaneously prepare multiple electrolytic copper foils. Thus, the present application provides an air stirring electrolytic cell.

[0005] To solve the above technical problems, the technical solution of the present application is as follows:

[0006] An air stirring electrolytic cell, comprising a cell body and a cell cover covering the cell body, the side wall of the cell body is surrounded by a plurality of arc-shaped side plates, and each arc-shaped side plate is provided with a gas inlet; the middle part of the bottom wall of the cell body is provided with a positioning structure suitable for positioning and fixing the electrode plate, the space above the positioning structure of the cell body is a central electroplating area, the gas inlet direction of the plurality of gas inlets avoids the central electroplating area, and the top of the cell cover is provided with a waste gas outlet.

[0007] Further, a plurality of air inlets are arranged on each of the arc-shaped side plates at different height positions.

[0008] Further, the positioning structure comprises a plurality of positioning strips arranged side by side on the groove bottom wall, at least two positioning structures are arranged on each of the positioning strips, and the positioning structures on the plurality of positioning strips are located on the same straight line.

[0009] Further, a separation net corresponding to the cross-sectional shape of the groove is arranged in the groove.

[0010] Further, a plurality of protrusions are arranged on each of the arc-shaped side plates, and the separation net is located on the plurality of protrusions.

[0011] Further, the groove cover is convex towards the direction away from the groove, and the groove cover edge is provided with a collection groove.

[0012] Further, a waste liquid outlet is arranged on the collection groove at the bottom of the groove cover.

[0013] Further, a plurality of liquid inlets are arranged on the groove bottom wall.

[0014] Further, the plurality of liquid inlets are arranged side by side, and the liquid inlets are obliquely arranged on the groove bottom wall.

[0015] Further, an overflow port is arranged on the groove side wall, and the overflow port is located below the separation net.

[0016] The technical scheme of the present application has the following advantages:

[0017] 1. The air stirring electrolytic tank provided by the present application, by setting multiple arc-shaped enclosures into the tank body, and setting air inlets on each arc-shaped side plate, air is introduced through the air inlets to generate air flow in the tank body, air stirring is carried out, air is introduced through the air inlets of the multiple arc-shaped side plates, which can generate multiple different directions to drive the electrolyte to rotate, so as to avoid the central electroplating area in the tank body from generating bubbles due to the air flow sprayed from the bottom, and the air inlet direction avoids the central electroplating area located above the positioning structure, so as to avoid the gas directly reaching the electrode plate to generate bubbles, thereby improving the electrolyte supplement effect of the electrode plate, improving the adhesion effect of copper on the electrode plate, and ensuring the quality of the prepared electrolytic copper foil. The tank cover can prevent the electrolyte from evaporating or volatilizing too quickly, and can also prevent waste gas from polluting the air. The waste gas outlet at the top of the tank cover can timely discharge the waste gas for centralized treatment. Multiple positioning structures are arranged in the tank body, which can simultaneously position and fix multiple cathode and anode plates, and simultaneously prepare multiple electrolytic copper foils. At the same time, the cathode plate and the anode plate can be prevented from moving with the electrolyte during stirring, so as to ensure the stability of the electrode distance between the cathode plate and the anode plate, thereby ensuring the thickness uniformity and preparation quality of the prepared multiple electrolytic copper foils, and ensuring the consistency and reproducibility of the electrolytic copper foils prepared in the same batch.

[0018] 2. The air stirring electrolytic tank provided by the present application, multiple air inlets are arranged on each arc-shaped side plate, which can improve the electrolyte flow rate during air stirring. The multiple air inlets are arranged at different height positions of the arc-shaped side plate. Multiple air flows in different directions can be generated, which further improves the electrolyte flow rate during air stirring; at the same time, the electrolyte flow rate can be adjusted by changing the number of air inlets. The air inlets on the multiple arc-shaped side plates are arranged close to the same side edge of the corresponding arc-shaped side plate, so that the air flow directions generated by the multiple air inlets are consistent, thereby ensuring the driving rotation effect of the air flow on the electrolyte.

[0019] 3. The air stirring electrolytic tank provided by the present application, multiple positioning strips are arranged side by side on the bottom wall in the tank body, at least two positioning structures are arranged on each positioning strip, and the two positioning structures on the multiple positioning strips are located on two straight lines. In this way, multiple cathode plates and anode plates can be fixed simultaneously through the positioning structures on the multiple positioning strips, and the electrode distance between the multiple cathode plates and anode plates is stable, thereby ensuring the thickness uniformity and preparation quality of the prepared multiple electrolytic copper foils. By changing the positions of the cathode plate and the anode plate inserted into the positioning structures, the electrode distance can be changed, which is convenient for laboratory to explore the influence of the electrode distance on the preparation of the electrolytic copper foil.

[0020] 4. The air-agitated electrolytic cell provided by the present application is provided with a partition net corresponding to the shape of the cell body. The upward airflow is generated in the cell body, and the airflow is wet. The upward airflow is blocked by the partition net, so that the electrolyte carried by the airflow is crystallized at the partition net, preventing the electrolyte carried by the upward airflow from being cooled and crystallized into copper sulfate after entering the waste gas and liquid outlet, thereby blocking the waste gas outlet and the waste liquid outlet. The partition net has a certain heat insulation effect, which can reduce the temperature fluctuation of the electrolyte in the cell body.

[0021] 5. The air-agitated electrolytic cell provided by the present application is provided with a protrusion on each arc-shaped side plate, and the partition net is located on the protrusions. The partition net is limited by the protrusions, so that the stability of the partition net is ensured, and the partition net is prevented from falling into the electrolyte in the cell body and affecting the preparation effect of the electrolytic copper foil.

[0022] 6. The air-agitated electrolytic cell provided by the present application is provided with a collection groove on the edge of the cell cover. The liquid droplets formed by the upward airflow flow along the inner wall of the cell cover to the collection groove on the edge of the cell cover, avoiding falling back into the electrolyte below and affecting the purity and quality of the electrolyte.

[0023] 7. The air-agitated electrolytic cell provided by the present application is provided with a waste liquid outlet at the bottom of the cell cover. The waste liquid in the collection groove can be discharged through the waste liquid outlet, preventing the waste liquid in the collection groove from overflowing and affecting the purity and quality of the electrolyte in the cell body.

[0024] 8. The air-agitated electrolytic cell provided by the present application is provided with a plurality of liquid inlets on the bottom wall of the cell body. The electrolyte can be replenished in time.

[0025] 9. The air-agitated electrolytic cell provided by the present application is provided with a plurality of liquid inlets arranged side by side, and the liquid inlets are inclinedly arranged on the bottom wall of the cell body. The electrolyte can be replenished more quickly through the plurality of liquid inlets, and the electrolyte can be directly sprayed on the electrode plate when the electrolyte is replenished, so that the copper ions on the electrode plate are replenished in time.

[0026] 10. The air-agitated electrolytic cell provided by the present application is provided with an overflow port on the side wall of the cell body, and the overflow port is located below the partition net. When the electrolyte in the cell body is excessive, the electrolyte can flow out through the overflow port, preventing the low-concentration electrolyte from contacting the partition net and affecting the subsequent preparation effect, and the low-concentration electrolyte can be discharged from the cell body in time, promoting the circulation of the electrolyte and keeping the concentration of the electrolyte in the cell body relatively constant. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the specific embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or prior art description. Obviously, the drawings described below are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor based on these drawings.

[0028] Figure 1 An exploded view of the air-stirring electrolytic cell provided by the embodiment of the present application is shown in the figure.

[0029] Figure 2 A perspective view of the air-stirring electrolytic cell provided by the embodiment of the present application is shown in the figure.

[0030] Figure 3 A sectional view of the air-stirring electrolytic cell provided by the embodiment of the present application is shown in the figure.

[0031] Figure 4 A schematic view of the connection relationship between the cell body and the electrode plate in the present application is shown in the figure.

[0032] Legend of the figures: 0, electrode plate; 1, cell body; 11, arc-shaped side plate; 12, air inlet; 13, positioning strip; 14, positioning groove; 15, liquid inlet; 16, overflow port; 2, cell cover; 21, waste gas outlet; 22, collection tank; 23, waste liquid outlet; 3, separation net. DETAILED DESCRIPTION

[0033] The technical solutions of the present application will be described in detail below with reference to the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0034] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0035] In the description of the present application, it should be noted that unless specifically defined and limited otherwise, the terms "mounting", "connection", "linking" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium, or internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0036] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as there is no conflict between them.

[0037] As Figures 1-4 An air stirring electrolytic cell, as shown in the drawings, comprises a cell body 1 and a cell cover 2 covering the cell body 1, the side wall of the cell body 1 is surrounded by a plurality of arc-shaped side plates 11 into a petal shape, and an air inlet 12 is arranged on each arc-shaped side plate 11; a plurality of positioning structures suitable for limiting and fixing the polar plate 0 are arranged on the bottom wall in the cell body 1, and the top of the cell cover 2 is provided with a waste gas outlet 21.

[0038] The air stirring electrolytic cell, by surrounding the cell body 1 with a plurality of arc-shaped side plates 11, and arranging air inlets 12 on each arc-shaped side plate 11, air flow is generated in the cell body 1 by air inlet 12, air stirring is carried out, air inlet 12 of the plurality of arc-shaped side plates 11 can produce a plurality of different directions to drive the electrolyte to rotate, so as to avoid the central electroplating area in the cell body 1 from generating bubbles due to the air flow from the bottom, and the air inlet 12 avoids the central electroplating area above the positioning structure, so as to avoid the gas directly reaching the polar plate 0 to generate bubbles, thereby improving the electrolyte replenishment effect of the polar plate 0, improving the adhesion effect of copper on the polar plate 0, and ensuring the quality of the prepared electrolytic copper foil. The cell cover 2 can avoid the electrolyte from evaporating or volatilizing too fast, and can also avoid the waste gas from polluting the air. The waste gas evaporated through the waste gas outlet 21 at the top of the cell cover 2 can be discharged in time and treated centrally. A plurality of positioning structures are arranged in the cell body 1, which can limit and fix a plurality of cathode and anode plates at the same time, and can prepare a plurality of electrolytic copper foils at the same time; at the same time, the cathode plate and the anode plate can be prevented from moving with the electrolyte during stirring, so as to ensure the stability of the polar distance between the cathode plate and the anode plate, thereby ensuring the thickness uniformity and preparation quality of the prepared plurality of electrolytic copper foils, and ensuring the consistency and reproducibility of the electrolytic copper foils prepared in the same batch.

[0039] In the embodiment, a plurality of air inlets 12 are arranged on each arc-shaped side plate 11, and the plurality of air inlets 12 are arranged at different height positions of the arc-shaped side plate 11. Specifically, the plurality of air inlets 12 are arranged in at least two rows staggered on the arc-shaped side plate 11, and the air inlets 12 on the plurality of arc-shaped side plates 11 are arranged close to the same side edge of the corresponding arc-shaped side plate 11. In this way, the electrolyte flow rate during air stirring can be improved by the plurality of air inlets 12 at different heights; the plurality of air inlets 12 arranged staggered can generate multiple air flows, further improving the electrolyte flow rate during air stirring; and the air inlets 12 on the plurality of arc-shaped side plates 11 arranged close to the same side edge of the corresponding arc-shaped side plate 11 can make the air flows generated by the plurality of air inlets 12 consistent in direction, thereby ensuring the driving rotation effect of the air flow on the electrolyte.

[0040] In the embodiment, the positioning structure includes three positioning strips 13 arranged side by side on the bottom wall of the tank body 1. Specifically, the positioning strips 13 are arranged in two rows, each positioning strip 13 is provided with two positioning structures, and the positions of the plurality of positioning grooves 14 on the plurality of positioning strips 13 are located on the same straight line. The polar plate 0 is installed on at least two positioning strips 13 arranged side by side, which can ensure the stability of the polar plate 0 inserted into the positioning groove 14. In this way, the plurality of cathode plates and anode plates can be fixed at the same time by the positioning grooves 14 on the plurality of positioning strips 13, while the polar distance between the plurality of cathode plates and anode plates is stable, thereby ensuring the thickness uniformity and preparation quality of the plurality of electrolytic copper foils prepared. By changing the positions of the cathode plates and anode plates inserted into the positioning grooves 14, the polar distance can be changed, which is convenient for laboratory to explore the influence of the polar distance on the preparation of electrolytic copper foil.

[0041] Specifically, the polar plate 0 is arranged perpendicular to the positioning strip 13, so that the electrolyte in the tank body 1 is hindered by the polar plate 0 when rotating, thereby forming a stirring effect on the electrolyte in the tank body 1 by the polar plate 0. In an alternative embodiment, the polar plate 0 can also be installed on one positioning strip.

[0042] In the embodiment, a separation net 3 corresponding to the shape of the tank body 1 is arranged in the tank body 1. In this way, since the upward air flow is generated in the tank body 1, and the air flow is wet, part of the upward air flow can be blocked by the separation net 3, so that the electrolyte carried by the upward air flow crystallizes at the separation net 3, preventing the electrolyte carried by the upward air flow from cooling and crystallizing into copper sulfate after entering the waste gas outlet 21 and the waste liquid outlet 23, thereby blocking the waste gas outlet 21 and the waste liquid outlet 23. At the same time, the separation net 3 has a certain heat insulation effect, which can reduce the temperature fluctuation of the electrolyte in the tank body 1. Specifically, a protrusion is arranged on each arc-shaped side plate 11, and the separation net 3 is located on the plurality of protrusions (not shown in the figure). In this way, the separation net 3 can be limited, ensuring the stability of the separation net 3, and avoiding the separation net 3 falling into the electrolyte in the tank body 1 and affecting the preparation effect of the electrolytic copper foil.

[0043] In the embodiment, the center of the tank cover 2 is raised towards the direction away from the tank body 1, and the edge of the tank cover 2 is provided with a collection groove 22. In this way, the liquid droplets formed by the rising air flow can flow along the inner wall of the tank cover 2 to the collection groove 22 at the edge of the tank cover 2, avoiding falling back into the electrolyte below along the inner wall of the tank cover 2, thereby affecting the purity and quality of the electrolyte. Specifically, the collection groove 22 is provided with a waste liquid outlet 23 at the bottom of the tank cover 2. In this way, the waste liquid in the collection groove 22 can be discharged through the waste liquid outlet 23, avoiding the overflow of the waste liquid in the collection groove 22 to affect the purity and quality of the electrolyte in the tank body 1. At the same time, the discharged waste liquid is convenient for collection and recycling.

[0044] In the embodiment, a plurality of liquid inlets 15 are formed on the bottom wall of the tank body 1. In this way, the electrolyte can be replenished in time. Specifically, the plurality of liquid inlets 15 are arranged side by side, and the liquid inlets 15 are obliquely formed on the bottom wall of the tank body 1. In this way, the electrolyte can be replenished more quickly through the plurality of liquid inlets 15, and the oblique arrangement of the liquid inlets 15 can directly spray the electrolyte on the electrode plate 0 when replenishing the electrolyte, thereby replenishing the copper ions on the electrode plate 0 in time.

[0045] In the embodiment, the tank body 1 is provided with an overflow port 16 below the screen 3. In this way, when the electrolyte in the tank body 1 is too much, it can flow out through the overflow port 16, while avoiding the contact between the introduced low-concentration electrolyte and the screen 3 to affect the subsequent preparation effect, and also can timely discharge the low-concentration electrolyte outside the tank body 1, promote the circulation of the electrolyte, and make the electrolyte concentration in the tank body 1 relatively constant.

[0046] In summary, the air-stirring electrolytic cell, by setting multiple arc-shaped side plates 11 to enclose the tank body 1, and setting air inlets 12 on each arc-shaped side plate 11, air flow is generated in the tank body 1 through the air inlets 12 to stir the air, the air inlets 12 of the multiple arc-shaped side plates 11 can generate multiple different orientation driving electrolyte rotation, thereby avoiding the central electroplating area in the tank body 1 from generating bubbles due to the air flow sprayed from the bottom, at the same time, the air inlet 12 avoids the central electroplating area located above the positioning structure, which can avoid the gas directly reaching the electrode plate 0 to generate bubbles, thereby improving the electrolyte replenishment effect of the electrode plate 0, improving the adhesion effect of copper on the electrode plate 0, and ensuring the quality of the prepared electrolytic copper foil. Through the tank cover 2, the electrolyte can be prevented from evaporating or volatilizing too quickly, and waste gas pollution can also be avoided, the evaporated waste gas can be discharged in time through the waste gas outlet 21 at the top of the tank cover 2, and concentrated treatment. Multiple positioning structures are arranged in the tank body 1, which can simultaneously limit and fix multiple cathode and anode plates, and simultaneously prepare multiple electrolytic copper foils; at the same time, the cathode plate and the anode plate can be prevented from moving with the electrolyte during stirring, which can ensure the stability of the electrode distance between the cathode plate and the anode plate, thereby ensuring the thickness uniformity and preparation quality of the prepared multiple electrolytic copper foils, and ensuring the consistency and reproducibility of the electrolytic copper foils prepared in the same batch.

[0047] Obviously, the above embodiments are only examples for clearly illustrating the present application, and are not intended to limit the embodiments. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, all the embodiments do not need to be exhausted, and the obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. An air agitated electrolytic cell characterised in that, The utility model provides a kind of electroplating tank, including groove (1) and cover the groove cover (2) on the groove (1), the side wall of the groove (1) is enclosed by several arc side plates (11), each arc side plate (11) is provided with air inlet (12);The middle part of the bottom wall of the groove (1) is provided with positioning structure suitable for limiting and fixing polar plate (0), the space above the positioning structure of the groove (1) is central electroplating area, the air inlet direction of several air inlets (12) avoids the central electroplating area, the top of the groove cover (2) is provided with waste gas outlet (21);Each arc side plate (11) is provided with multiple air inlets (12), multiple air inlets (12) are arranged at different height positions of the arc side plate (11), and the air inlets (12) on multiple arc side plates (11) are arranged close to the same side edge of the corresponding arc side plate (11).

2. The air-stirred electrolyzer of claim 1, wherein, The positioning structure includes a plurality of positioning strips (13) arranged side by side on the bottom wall of the groove (1), each positioning strip (13) has at least two positioning grooves (14) formed therein, and the positioning grooves (14) corresponding in position on the plurality of positioning strips (13) are located on the same straight line.

3. The air-stirred electrolysis cell of claim 1, wherein, The groove (1) is provided with a separation net (3) corresponding to the cross-sectional shape of the groove (1).

4. The air agitated electrolytic cell of claim 3, wherein, Each arc side plate (11) is provided with a protrusion, and the separation net (3) is located on the plurality of protrusions.

5. The air-stirred electrolysis cell of claim 1, wherein, The center of the groove cover (2) is raised away from the groove (1), and the edge of the groove cover (2) is provided with a collection groove (22).

6. An air agitated electrolytic cell according to claim 5, characterised in that, The collection groove (22) is provided with a waste liquid outlet (23) located at the bottom of the groove cover (2).

7. The air-stirred electrolytic cell of claim 1, wherein, A plurality of liquid inlets (15) are formed in the bottom wall of the groove (1).

8. The air agitated electrolytic cell of claim 7, wherein, The plurality of liquid inlets (15) are arranged side by side, and the liquid inlets (15) are inclined to be formed in the bottom wall of the groove (1).

9. The air agitated electrolytic cell of claim 3, wherein, The side wall of the groove (1) is provided with an overflow port (16) located below the separation net (3).

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