Efficiently dissolving copper powder tank

Abstract

The utility model discloses a kind of high-efficiency dissolving copper powder tank, including tank body, the tank body is equipped with hierarchical dissolving unit, the hierarchical dissolving unit is equipped with feed inlet and discharge port, stirring unit and air unit for being used to improve reaction rate of internal mixed solution of hierarchical dissolving unit are equipped on the tank body;The utility model simple structure, reasonable in design, realize the step-by-step dissolution of copper powder and solid-liquid separation of copper powder by multi-chamber series connection design and PP filter cloth spacer, combined with the forced convection circulation of stirring and air unit accelerates reaction process;Final stage chamber is equipped with precision filter core to intercept residual particles, cooperate overflow baffle and bubble baffle to eliminate bubble interference, guarantee the purity of effluent and conveying stability;Double feed inlet design realizes the synchronous accurate addition of copper powder and dilute sulfuric acid, improves dissolution uniformity;The device has the advantages of high dissolution efficiency, high solution purity, low maintenance cost, etc., and is suitable for large-scale industrial copper powder dissolving process.

Description

Technical Field

[0001] This utility model relates to the field of dissolving equipment technology, specifically to a high-efficiency copper powder dissolving tank. Background Technology

[0002] With the rapid development of high-density circuit board manufacturing technology, vertical continuous plating (VCP) and horizontal plating technologies have been widely used due to their advantages in coating uniformity. These plating processes use insoluble anodes and require the real-time dissolution of copper oxide powder to replenish copper ions and maintain a stable plating solution concentration. The amount added must be precisely matched to the amount of electricity used in plating. However, the dissolution reaction efficiency of copper oxide powder and sulfuric acid directly affects the timeliness of copper ion replenishment: if the local acid concentration is insufficient or the reaction kinetics are limited during the dissolution process, fluctuations in copper ion concentration can easily occur, thus affecting plating uniformity and production efficiency.

[0003] The copper melting bath technology currently on the market has the following significant drawbacks:

[0004] 1. Risk of contamination by impurities: The quality of copper oxide powder raw materials varies. Inferior powder can easily introduce insoluble impurities (such as metal oxides, organic residues, etc.), which can contaminate the electroplating solution and cause defects such as pinholes and pitting in the plating layer.

[0005] 2. Low dissolution efficiency: Traditional copper dissolution tanks are mostly single-cavity structures. Mixed solutions are prone to problems such as uneven acid concentration gradient and sedimentation and accumulation of undissolved particles, resulting in low reaction efficiency and delayed copper ion replenishment, making it difficult to meet the needs of high-capacity electroplating.

[0006] 3. Insufficient filtration and gas-liquid separation: Existing equipment lacks a step-by-step filtration and bubble elimination design. Residual particles and microbubbles can easily flow into the electroplating system with the solution, exacerbating the contamination of the plating solution and increasing the risk of pump cavitation.

[0007] Therefore, there is an urgent need for a new type of copper dissolving tank that can achieve efficient dissolution of copper oxide powder, graded interception of impurities, and gas-liquid synergistic optimization, so as to ensure the stability of the electroplating process and product quality. Utility Model Content

[0008] The purpose of this invention is to provide a high-efficiency copper powder dissolving tank to solve the problems mentioned in the background art.

[0009] To achieve the above objectives, this utility model provides the following technical solution: a high-efficiency copper powder dissolving tank, comprising a tank body, wherein a graded dissolving unit is provided in the tank body, the graded dissolving unit is provided with an inlet and an outlet, and the tank body is provided with a stirring unit and an aeration unit for increasing the reaction rate of the mixed solution inside the graded dissolving unit; the graded dissolving unit includes: a plurality of chambers arranged sequentially, the inlet and the outlet being respectively located on the front chamber and the rear chamber, and each chamber being separated from each other by a plurality of isolation members, each isolation member having a flow port at its upper or lower end, and the upper or lower notches of adjacent isolation members being alternately arranged, thereby forming a flow channel structure in which the mixed solution flows sequentially and dissolves step by step in each chamber.

[0010] By using multiple sequentially arranged chambers, the dissolution and mixing of copper oxide powder can be completed step by step, ensuring that undissolved particles float to the surface and separate, thus improving dissolution efficiency.

[0011] Preferably, the stirring unit includes: a motor mounted on the tank; and a stirring rod located at the output end of the motor for stirring the mixed solution within the chamber.

[0012] Preferably, the air-blowing unit includes: an air pipe connected to an air supply device, the air pipe being disposed on the tank and located at the bottom of the chamber; and an air hole, the air hole being formed on the air pipe.

[0013] By using a stepped flow field design, combined with the disturbance of the aeration unit and the stirring unit, a forced convection circulation is formed, shortening the dissolution time; at the same time, by rationally dividing the functional chambers, a balance between solution quality and production efficiency is achieved.

[0014] Preferably, the separator is a PP filter cloth.

[0015] Preferably, the number of chambers is six, wherein the fifth chamber is provided with a filter element for intercepting residual copper oxide.

[0016] By incorporating a filter element, residual copper oxide powder and impurities are intercepted. Compared to traditional final-stage filtration designs, this layout provides a larger filtrate storage space, avoiding the problem of restricted solution flow caused by the location of the filter chamber.

[0017] Preferably, the sixth chamber is provided with an overflow baffle, and the outlet of the sixth chamber is provided with an air bubble baffle. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the inlet end structure of the tank of this utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the trachea's air vent in this utility model.

[0021] Figure 4 This is a schematic diagram of the outlet end structure of the tank of this utility model;

[0022] Figure 5 This is a schematic diagram of the structure at the discharge port of this utility model.

[0023] In the diagram: 1. Tank; 2. Staged dissolution unit; 201. Chamber; 202. Isolator; 203. Flow port; 3. Feed inlet; 4. Discharge outlet; 5. Stirring unit; 501. Motor; 502. Stirring rod; 6. Aeration unit; 601. Air pipe; 602. Air hole; 7. Overflow baffle; 8. Bubble baffle; 9. Fifth chamber; 10. Sixth chamber. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] In the description of this patent, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integrated connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this patent according to the specific circumstances.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "several" means two or more, unless otherwise explicitly specified.

[0028] Example

[0029] Please see Figure 1-5 As shown, the present invention provides a high-efficiency copper powder dissolving tank technical solution: a high-efficiency copper powder dissolving tank includes a tank body 1, a graded dissolving unit 2 is provided in the tank body 1, the graded dissolving unit 2 is provided with an inlet 3 and an outlet 4, and the tank body 1 is provided with a stirring unit 5 and an aeration unit 6 for improving the reaction rate of the mixed solution inside the graded dissolving unit 2.

[0030] The graded dissolution unit 2 includes multiple chambers 201 arranged sequentially. The inlet 3 and outlet 4 are respectively located on the front chamber 201 and the rear chamber 201. Each chamber 201 is separated from each other by installing multiple isolation members 202. Each isolation member 202 has a flow port 203 at its upper or lower end, and the upper or lower notches of adjacent isolation members 202 are alternately arranged, thereby forming a flow channel structure in which the mixed solution flows sequentially and dissolves in each chamber 201 step by step.

[0031] In this embodiment, the separator 202 is made of PP filter cloth, which helps to achieve solid-liquid separation and guides the stable flow of the mixture, thereby improving the fractional dissolution efficiency of copper oxide powder. This material has good corrosion resistance, is easy to replace and maintain, and effectively extends the service life of the equipment.

[0032] Through multiple sequentially arranged chambers 201, the dissolution and mixing of copper oxide powder can be completed step by step, ensuring that undissolved particles float and separate, thus improving dissolution efficiency.

[0033] The stirring unit 5 includes a motor 501 and a stirring rod 502. The motor 501 is mounted on the tank 1, and the stirring rod 502 is located at the output end of the motor 501, for stirring the mixed solution in the chamber 201.

[0034] The air blowing unit 6 includes an air pipe 601 and an air hole 602 connected to the air supply equipment. The air pipe 601 is located on the tank 1 and at the bottom of the chamber 201. The air hole 602 is opened on the air pipe 601.

[0035] In this embodiment, the gas supply equipment can be an air compressor, a gas pump, or an external gas storage tank, which can continuously and stably supply a gas source to the gas pipe 601 to ensure the continuity of the gas blowing process.

[0036] By using a stepped flow field design, combined with the disturbance of the aeration unit 6 and the stirring unit 5, a forced convection circulation is formed, shortening the dissolution time; at the same time, by rationally dividing the functional chambers 201, a balance between solution quality and production efficiency is achieved.

[0037] In this embodiment, there are six chambers 201, among which the fifth chamber 9 is equipped with a filter element (not shown in the figure) for intercepting residual copper oxide. This filter element is used to perform fine filtration of the mixed solution in the final dissolution stage, thereby improving the purity of the effluent. The filter element is a precision filter element with a density of 1μm, which can effectively trap fine copper oxide particles and impurities, ensuring the cleanliness of the effluent.

[0038] The sixth chamber 10 is equipped with an overflow baffle 7 to eliminate tiny bubbles generated during the dissolution process and prevent bubbles from flowing out with the solution. The outlet 4 of the sixth chamber 10 is equipped with a bubble baffle 8, which is located at the front end of the pump inlet to effectively block residual bubbles from entering the delivery pump, prevent pump cavitation caused by bubbles, and thus ensure stable delivery of the solution.

[0039] By installing a filter element in the fifth chamber 9, effective interception of copper oxide residue and other impurities can be achieved. Compared to the traditional method of placing the filter structure at the discharge end, this arrangement provides a larger buffer space for the filtrate, avoiding the problem of restricted solution flow caused by the limited location of the filter chamber. At the same time, the synergistic effect of the overflow baffle 7 and the bubble baffle 8 eliminates microbubbles, prevents cavitation, effectively improves the stability of solution delivery, and optimizes the overall system performance.

[0040] In this embodiment, the feed inlet 3 can also be configured as two, located at the top and bottom of the first chamber 201 at the front end, respectively. The top feed inlet 3 is used for quantitatively adding copper oxide powder, facilitating control of the amount of solid raw material added; the bottom feed inlet 3 is used to introduce dilute sulfuric acid as a solvent to participate in the chemical reaction. This structural design enables the simultaneous addition of copper oxide powder and dilute sulfuric acid in the initial stage of entering the dissolution system, which helps to quickly start the reaction process and improve the uniformity and efficiency of the dissolution reaction. Furthermore, the separate top and bottom feed structures also allow for flexible adjustment of the feeding method according to actual process needs, adapting to different dissolution rates and ratio requirements.

[0041] The working principle of this utility model is as follows:

[0042] In this embodiment, a high-efficiency copper powder dissolving tank is used. Copper oxide powder and dilute sulfuric acid are simultaneously added to the first chamber 201 through the feed inlet 3. The motor 501 of the stirring unit 5 drives the stirring rod 502 to stir the mixture. At the same time, the gas pipe 601 of the aeration unit 6 blows gas (such as air or oxygen) into the bottom of the chamber 201 through the gas hole 602, forming a forced convection of gas-solid-liquid three phases. The mixture flows through the PP filter cloth of the isolation component 202 step by step. Undissolved coarse copper oxide powder particles are trapped in the current chamber 201 by the micropores of the PP cloth and continue to react, while the dissolved fine particles or ionic solution enter the next chamber 201 through the alternately arranged flow ports 203, completing the oxidation and dissolution step by step.

[0043] In the fifth chamber 9, a precision filter element with a density of 1μm further intercepts residual copper oxide particles, ensuring solution purity. The overflow baffle 7 in the sixth chamber 10 eliminates tiny bubbles generated during dissolution, and the bubble baffle 8 prevents residual bubbles from entering the delivery pump at the outlet 4, avoiding cavitation. Finally, a pure copper sulfate solution is stably output from the final outlet 4.

[0044] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency copper powder dissolving tank, characterized in that: The system includes a tank containing a staged dissolution unit. The staged dissolution unit has an inlet and an outlet. The tank is equipped with a stirring unit and an aeration unit to increase the reaction rate of the mixed solution inside the staged dissolution unit. The staged dissolution unit includes multiple chambers arranged sequentially. The inlet and outlet are respectively located on the front chamber and the rear chamber. Each chamber is separated from the others by multiple partitions. Each partition has a flow port at its upper or lower end, and the upper or lower notches of adjacent partitions are alternately arranged, thereby forming a flow channel structure in which the mixed solution flows sequentially and dissolves step by step in each chamber.

2. The high-efficiency copper powder dissolving tank according to claim 1, characterized in that: The stirring unit includes: a motor mounted on the tank; and a stirring rod located at the output end of the motor for stirring the mixed solution within the chamber.

3. The high-efficiency copper powder dissolving tank according to claim 1, characterized in that: The air-blowing unit includes: an air pipe connected to an air supply device, the air pipe being disposed on the tank and located at the bottom of the chamber; and an air hole, the air hole being opened on the air pipe.

4. The high-efficiency copper powder dissolving tank according to claim 1, characterized in that: The isolation element is a PP filter cloth.

5. The high-efficiency copper powder dissolving tank according to claim 1, characterized in that: The number of chambers is six, and the fifth chamber is equipped with a filter element for intercepting residual copper oxide.

6. The high-efficiency copper powder dissolving tank according to claim 5, characterized in that: The sixth chamber is equipped with an overflow baffle, and the outlet of the sixth chamber is equipped with an air bubble baffle.

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