Spraying copper dissolving tank

Abstract

The utility model discloses a spraying copper dissolving tank which comprises a tank body, a spraying pipe is arranged at the top of the tank body, a plurality of heightening steel frames are placed at the bottom of the tank body, the heightening steel frames are of frame structures made of corrosion-resistant materials, and the distance between a copper wire and an opening of the spraying copper dissolving tank can be reduced by arranging the heightening steel frames. The spatial distribution of the copper wires is raised, so that the copper dissolving efficiency of the spraying copper dissolving tank is improved.

Description

Technical Field

[0001] This utility model relates to the field of metal electrolytic foil production technology, specifically a spray copper melting tank. Background Technology

[0002] With the rapid development of the electronics and information industry and the power battery industry in recent years, the demand for copper foil has been increasing steadily. In the electronics industry, copper foil is a major material for copper clad laminates (CCL) and printed circuit boards (PCBs). In the field of lithium batteries and energy storage, the excellent conductivity of copper foil makes it one of the important raw materials for lithium battery current collectors. Among the methods of producing copper foil, electrodeposition has become the mainstream process for copper foil production both domestically and internationally due to its advantages in cost and process.

[0003] To accelerate battery manufacturing performance, it is essential to optimize each step of the electrolytic copper foil production process. The copper dissolution stage is a crucial link in the entire production process, as the dissolution efficiency of the copper sulfate solution directly affects the yield and quality of the copper foil. The copper dissolution process is essentially a chemical dissolution. The spraying efficiency of traditional spray copper dissolution tanks is limited by the following issues: 1. Loss of spray liquid kinetic energy: Due to cost reduction and efficiency improvement efforts, the height of the solid copper in the spray copper dissolution tank is reduced, resulting in a decrease in the impact force of the liquid flow over long distances, making it difficult to wash away the oxide layer on the surface of the copper wire; 2. Fixed copper wire accumulation position: Copper wires usually accumulate at the bottom of the copper dissolution tank. When the spray liquid flows from top to bottom, the bottom copper wires are easily covered by the upper copper material, resulting in insufficient contact area; 3. Uneven reaction: The temperature and acid concentration gradients vary greatly in different height areas within the spray copper dissolution tank, easily forming reaction dead zones at the bottom. Utility Model Content

[0004] This invention provides a spray copper melting tank that can solve various problems caused by copper wire accumulating at the bottom of the tank.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a copper-dissolving spray tank, comprising a tank body, a spray pipe provided at the top of the tank body, and multiple heightening steel frames placed at the bottom of the tank body. The heightening steel frames are frame structures made of corrosion-resistant materials. By setting the heightening steel frames, the distance between the copper wire and the opening of the copper-dissolving spray tank can be reduced, and the spatial distribution of the copper wire can be raised, thereby improving the copper-dissolving efficiency of the copper-dissolving spray tank.

[0006] Preferably, the heightening steel frame is a cubic or cuboid frame structure made of stainless steel tubing. The cubic or cuboid frame structure is relatively simple and stable, and will not affect the flow of the copper molten liquid.

[0007] Preferably, at least one horizontal bar is provided at the top hollowed-out position of the heightening steel frame to increase the support of the heightening steel frame for the copper wire.

[0008] Preferably, the spray pipe includes several annular spray pipes installed on the top side wall inside the tank and a central spray pipe located vertically in the middle of the tank. The heightening steel frame is evenly placed around the central spray pipe. The annular spray pipes and the central spray pipe can spray the copper wires from all directions, and the evenly placed heightening steel frame can support all the copper wires.

[0009] Preferably, a spray circulation pipeline connecting the bottom of the tank to the spray pipe is provided inside the tank near the side wall. A circulation pump is connected to the spray circulation pipeline to enable continuous circulation of the copper molten liquid in the tank.

[0010] Preferably, the lower part of the tank is provided with a raised perforated plate, and the raised steel frame is placed on the upper side of the raised perforated plate, which can raise the raised steel frame and copper wire, and the copper molten liquid is concentrated at the bottom of the tank.

[0011] Preferably, an air inlet is provided on the lower side wall of the tank, located below the raised perforated plate.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] With a simple structure, the distance between the copper wire and the spray copper dissolving tank opening can be reduced by setting up an elevated steel frame, thereby increasing the spatial distribution of the copper wire and improving the copper dissolving efficiency of the spray copper dissolving tank. The copper dissolving effect is very good, which can reduce the amount of solid copper in the spray copper dissolving tank, reduce costs and increase efficiency. It adopts an all-round spray structure and copper dissolving liquid circulation structure, and the copper dissolving process is stable. Attached Figure Description

[0014] Figure 1 This is a structural diagram of the tank body of this utility model;

[0015] Figure 2 This is a structural diagram of the height-increasing steel frame of this utility model.

[0016] Figure label:

[0017] 1. Tank body, 2. Elevating perforated plate, 3. Heightening steel frame, 31. Crossbar, 4. Annular spray pipe, 5. Spray circulation pipeline, 6. Central spray pipe, 7. Air inlet, 8. Circulation pump, 9. Connecting pipeline. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0019] This utility model aims to solve various problems caused by the accumulation of copper wire at the bottom of the can. For example... Figure 1-2As shown, the following technical solution is provided: a spray copper melting tank, including a tank body 1, a spray pipe is provided on the top of the tank body 1, and multiple raising steel frames 3 are placed at the bottom of the tank body 1. The raising steel frames 3 are frame structures made of corrosion-resistant materials. By setting the raising steel frames 3, the distance between the copper wire and the opening of the spray copper melting tank can be reduced, and the spatial distribution of the copper wire can be raised to improve the copper melting efficiency of the spray copper melting tank.

[0020] Specifically, there can be multiple copper-spraying tanks connected in parallel via pipelines. The spray pipes can be connected to other copper-spraying tanks via external connecting pipes 9 for unified control. The shape of the lifting steel frame 3 can be customized as needed, and its top can be flat to support the copper wire. The number of lifting steel frames 3 can be increased or decreased as needed. For example, 6 lifting steel frames 3 can be hoisted into the bottom of the tank 1 by an overhead crane electric hoist, with 3 evenly distributed on one side, and then copper wire is placed on the 6 lifting steel frames 3.

[0021] The heightening steel frame 3 is a cubic or cuboid frame structure made of stainless steel pipes. The cubic or cuboid frame structure is relatively simple and stable, and will not affect the flow of copper molten liquid. The stainless steel can be 2205 stainless steel, and different pipes can be connected by welding.

[0022] The top hollowed-out position of the heightening steel frame 3 is provided with at least one horizontal bar 31, which can increase the support of the heightening steel frame 3 for the copper wire.

[0023] In this embodiment, as Figure 1 As shown, the spray pipe includes several annular spray pipes 4 installed on the top side wall inside the tank 1 and a central spray pipe 6 located vertically in the middle of the tank 1. The heightening steel frame 3 is evenly placed around the central spray pipe 6. The annular spray pipes 4 and the central spray pipe 6 can spray the copper wires in all directions. The evenly placed heightening steel frame 3 can support all the copper wires. The annular spray pipes 4 are evenly arranged vertically.

[0024] In order to achieve the recycling of copper molten solution, a spray circulation pipe 5 is provided inside the tank 1 near the side wall, which connects the bottom of the tank 1 to the spray pipe. A circulation pump 8 is connected to the spray circulation pipe 5, which can realize the continuous circulation of copper molten solution in the tank 1.

[0025] In this embodiment, as Figure 1 As shown, a raised perforated plate 2 is provided at the lower part of the tank body 1, and the raised steel frame 3 is placed on the upper side of the raised perforated plate 2. This can raise the raised steel frame 3 and the copper wire, so that the copper molten liquid is concentrated at the bottom of the tank body 1. The raised perforated plate 2 is fitted onto the central spray pipe 6, which also facilitates the even placement of the raised steel frame 3.

[0026] Meanwhile, an air inlet 7 is provided on the lower side wall of the tank body 1, located below the raised perforated plate 2, so that external oxygen can enter the tank body 1 through the air inlet 7.

[0027] The copper dissolving solution can be H2SO4 4， The process involves external diffusion of H2SO4 from the copper surface of the spray pipe; internal diffusion of H2SO4 along the voids and cracks in the copper material, penetrating deep into the metal; adsorption of H2SO4 on the metal surface, followed by a chemical reaction between the adsorbed H2SO4 and CuO; the reaction product CuSO4 detaching from the surface of the metallic copper; and diffusion of the reaction product CuSO4 from the surface of the reaction zone towards the center of the solution. Copper sulfate electrolyte at the bottom of the tank is circulated by a circulating pump to the top spray pipe, spraying it onto the surface of the copper wire, where it reacts with oxygen from the bottom air inlet to generate a copper sulfate solution.

[0028] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0029] Furthermore, in this utility model, descriptions involving terms such as "primary," "secondary," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "primary" or "secondary" may explicitly or implicitly include at least one of those features. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly and specifically defined.

[0030] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

Claims

1. A copper-dissolving spray tank, comprising a tank body (1), characterized in that, The tank (1) is provided with a spray pipe at the top and a plurality of heightening steel frames (3) are placed at the bottom of the tank (1). The heightening steel frame (3) is a frame structure made of corrosion-resistant material. The heightening steel frame (3) is a cubic or cuboid frame structure composed of stainless steel pipes. At least one horizontal bar (31) is arranged horizontally at the hollowed-out position at the top of the heightening steel frame (3). The spray pipe includes a plurality of annular spray pipes (4) arranged on the inner top side wall of the tank (1) and a central spray pipe (6) located vertically in the middle of the tank (1). The heightening steel frame (3) is evenly placed around the central spray pipe (6).

2. The copper-spraying melting tank according to claim 1, characterized in that: The tank (1) is provided with a spray circulation pipeline (5) that connects the bottom of the tank (1) to the spray pipe near the side wall. A circulation pump (8) is connected to the spray circulation pipeline (5).

3. The copper-spraying melting tank according to claim 2, characterized in that: The lower part of the tank body (1) is provided with a raised perforated plate (2), and the raised steel frame (3) is placed on the upper side of the raised perforated plate (2).

4. The copper-spraying melting tank according to claim 3, characterized in that: An air inlet (7) is provided on the lower side wall of the tank (1) below the raised perforated plate (2).

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