Copper dissolving tank and copper dissolving system

Abstract

The application specifically relates to a copper dissolving tank and a copper dissolving system, the copper dissolving tank comprising a tank body, a first liquid conveying pipe, at least one layer of filter screens arranged in the tank body, a bearing part, a second liquid conveying pipe and a third liquid conveying pipe, the at least one layer of filter screens being arranged in the axial direction of the tank body, a plurality of through holes being arranged on the filter screens, and copper wires being inserted into the through holes; the bearing part is arranged on the side of the filter screens close to an outlet and is arranged in a spaced manner with the filter screens; the bearing part comprises a bearing part and a supporting part, the bearing part is in abutment with the inner side wall of the tank body and is arranged in an extending manner towards the filter screens, the copper wires are borne on the side of the bearing part away from the outlet, a plurality of through holes are arranged on the bearing part in a spaced manner; one end of the supporting part is in abutment with the side of the bearing part away from the filter screens, and the other end is in abutment with the bottom wall of the tank body; the second liquid conveying pipe is arranged in a spaced manner with the side of the bearing part away from the supporting part; and the third liquid conveying pipe is arranged on the side of the filter screens close to the outlet and is arranged along the edge contour of the through holes. The application can reduce crystallization, increase the spraying range and improve the copper dissolving efficiency.

Description

Technical Field

[0001] This application belongs to the field of copper foil technology, specifically relating to a copper melting pot and copper melting system. Background Technology

[0002] In the production of electrolytic copper foil, the principle of copper dissolution is to convert metallic copper into Cu, which is soluble in water. 2+ That is: Cu becomes Cu 2+ In this process, metallic copper is transformed into an aqueous solution of copper sulfate. The copper dissolving process involves feeding treated, qualified metallic copper into a dissolving tank. Inside the tank, the raw metallic copper undergoes a series of chemical reactions with oxygen and sulfuric acid, dissolving the solid phase of the copper into a liquid phase of copper sulfate solution.

[0003] The copper dissolution process is a crucial step in the preparation of lithium-ion battery copper foil production. The efficiency of copper sulfate solution production directly impacts the yield and quality of the copper foil. During the copper dissolution process, under optimal conditions of chemical reaction temperature and oxygen supply, the reaction contact area is the key factor affecting the dissolution rate.

[0004] In existing technologies, copper is generally dissolved using a traditional spray method. However, the spray copper dissolution process has problems such as crystallization and spray dead zones, which affect the copper dissolution efficiency. Summary of the Invention

[0005] The purpose of this application is to provide a copper dissolving tank and copper dissolving system that can reduce crystallization and increase the spray range, thereby improving copper dissolving efficiency.

[0006] The first aspect of this application provides a copper melting vessel, the copper melting vessel including a vessel body, the vessel body having an inlet and an outlet communicating with each other; the copper melting vessel further includes:

[0007] At least one filter screen is disposed inside the tank, and the at least one filter screen is arranged in the axial direction of the tank. The filter screen is provided with multiple through holes, and copper wires are inserted into the through holes.

[0008] A support member is disposed inside the tank, located on the side of the filter screen near the outlet, and spaced apart from the filter screen. The support member includes a support portion and a supporting portion arranged sequentially in the direction from the inlet to the outlet. The support portion abuts against the inner wall of the tank and extends toward the filter screen. The copper wire is supported on the side of the support portion away from the outlet. The support portion has multiple spaced through holes. One end of the supporting portion abuts against the side of the support portion away from the filter screen, and the other end of the supporting portion abuts against the bottom wall of the tank.

[0009] The first infusion tube is located at the inlet and sprays electrolyte toward the copper wire;

[0010] The second infusion tube is disposed on the inner wall of the tank and extends along the axial direction of the tank. The second infusion tube is spaced apart from the side of the bearing part away from the support part.

[0011] The third infusion tube is located on the side of the filter screen near the outlet and is arranged along the edge contour of the through hole.

[0012] In one exemplary embodiment of this application, the cross-sectional area of ​​the supporting portion in the radial direction of the tank gradually decreases in the direction from the outlet to the inlet.

[0013] In one exemplary embodiment of this application, the cross-section of the support portion in the axial direction of the tank is triangular, and the included angle of the triangle toward the filter screen ranges from 105° to 150°.

[0014] In one exemplary embodiment of this application, the carrier further includes at least one support ring, at least one of the support rings being arranged in the axial direction of the tank body, and the support ring abutting against the inner wall of the carrier portion near the outlet side;

[0015] Each of the support rings abuts against one end of the plurality of support portions near the filter screen.

[0016] In one exemplary embodiment of this application, a plurality of second infusion tubes are arranged sequentially at intervals in the circumferential direction of the tank;

[0017] The second infusion tube extends linearly along the axial direction of the tank body; and / or

[0018] The second infusion tube is bent and extended in the direction from the inlet to the outlet.

[0019] In one exemplary embodiment of this application, the copper melting tank includes a first filter screen and a second filter screen, which are arranged alternately in the direction from the inlet to the outlet.

[0020] Both the first filter and the second filter include a plurality of first grid lines arranged at intervals in a first direction and a plurality of second grid lines arranged at intervals in a second direction. The first direction and the second direction intersect, and two adjacent first grid lines and two adjacent second grid lines form the through hole.

[0021] The area of ​​the through holes on the first filter screen is larger than the area of ​​the through holes on the second filter screen;

[0022] The third infusion tube is provided on both the first filter screen and the second filter screen, and the third infusion tube is arranged along the extension direction of the first grid line and the second grid line.

[0023] In one exemplary embodiment of this application, the third infusion tube is provided with a plurality of first spray holes, and the plurality of first spray holes are arranged sequentially at intervals in the circumferential direction of the third infusion tube;

[0024] The third infusion tube is welded to the first grid line and the second grid line.

[0025] In one exemplary embodiment of this application, the copper melting tank further includes a spray head, which is disposed on the side of the first infusion tube near the filter screen, and the spray range of the spray head covers the filter screen;

[0026] The first infusion tube is connected to the second infusion tube, and the second infusion tube is provided with at least one second spray hole, which faces the inside of the tank.

[0027] In one exemplary embodiment of this application, the tank body is further provided with a liquid inlet and an air inlet, the liquid inlet and the air inlet are respectively located at opposite ends of the tank body, the liquid inlet is connected to the third infusion pipe, and the air inlet is connected to the third infusion pipe.

[0028] A second aspect of this application provides a copper dissolving system, comprising:

[0029] Wastewater tank;

[0030] A blower, the blower including an air outlet, the air outlet being connected to an air inlet pipe;

[0031] A heat exchanger, which is connected to the air inlet duct;

[0032] At least two sets of copper melting tanks as described in any one of claims 1 to 9, each copper melting tank comprising a tank body, the tank body being provided with an inlet, an outlet, a liquid inlet, an air inlet, and a circulation port, the at least two sets of tank bodies being arranged sequentially in a third direction, the first tank body being connected to the wastewater tank via a circulation pump, the circulation port of the first tank body being connected to the inlet and liquid inlet of its adjacent tank body via the circulation pump, and the circulation port of one of the adjacent tank bodies being connected to the inlet and liquid inlet of the other of the adjacent tank bodies; the outlet of each tank body being connected to the wastewater tank via an outlet pipe, the outlet pipe being provided with the heat exchanger, the heat exchanger being able to exchange heat in the outlet pipe with heat in the air inlet pipe; the circulation pump being connected to the inlet and liquid inlet via the inlet pipe, and the blower being connected to the air inlet of each tank body via the air inlet pipe;

[0033] Both the liquid inlet pipe and the air inlet pipe are equipped with one-way valves.

[0034] The proposed solution has the following beneficial effects:

[0035] This application includes a copper dissolving tank, which comprises a tank body, at least one filter screen, a carrier, a first infusion pipe, a second infusion pipe, and a third infusion pipe. Copper wire is inserted into the through holes of the filter screen. The first, second, and third infusion pipes are located at the top, side, and around the copper wire, respectively. By adding the first, second, and third infusion pipes at the top, side, and adjacent positions of the copper wire, the dead angle of spraying the copper wire can be reduced, the contact area between the electrolyte and the copper wire can be increased, and thus the dissolution rate of the copper wire can be improved.

[0036] Furthermore, this application also includes a copper dissolving system, which comprises a wastewater tank, a blower, a heat exchanger, and at least two sets of copper dissolving tanks. Adjacent copper dissolving tanks are interconnected, allowing for electrolyte recycling and increasing the copper dissolving rate. The blower's outlet is connected to an air inlet pipe, which is connected to a third liquid delivery pipe via a heat exchanger. Air in the air inlet pipe undergoes heat exchange after passing through the heat exchanger, and then the heated air is mixed with the electrolyte to form an air-containing electrolyte, effectively increasing the copper dissolving rate. If the copper dissolving rate is too fast, the flow rate to the third liquid delivery pipe is reduced. The input electrolyte increases the airflow in the air inlet pipe, thereby increasing the oxidation effect of the air on the copper foil and reducing the copper dissolution rate. When crystals are present in the middle or bottom of the tank, the electrolyte flow in the first, second, and third inlet pipes is increased, and steam is added to the blower. The steam enters the third inlet pipe through the air inlet pipe, which increases the temperature of the electrolyte and can quickly eliminate the crystals inside the tank, thus preventing the crystals from affecting the copper dissolution rate and increasing the dissolution rate of the copper wire.

[0037] Other features and advantages of this application will become apparent from the following detailed description, or may be learned in part from practice of this application.

[0038] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0039] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0040] Figure 1 A schematic diagram of the copper melting vessel in Embodiment 1 or Embodiment 2 of this application is shown;

[0041] Figure 2 A schematic diagram of the copper melting system in Embodiment 1 or Embodiment 2 of this application is shown;

[0042] Figure 3 This illustration shows a schematic diagram of the tank body unfolding and the second infusion pipe being disposed on the tank body in Embodiment 1 or Embodiment 2 of this application;

[0043] Figure 4 A cross-sectional structural diagram of the first spray hole opened on the third infusion tube in Embodiment 1 or Embodiment 2 of this application is shown.

[0044] Explanation of reference numerals in the attached figures:

[0045] 10. Copper dissolving system; 100. Copper dissolving tank; 101. Tank body; 101a. First tank body; 101b. Second tank body; 102a. First filter screen; 102b. Second filter screen; 120. Through hole; 121. First grid line; 122. Second grid line; 103. Support component; 130. Support part; 131. Support part; 132. Support ring; 104. First infusion pipe; 105. Second infusion pipe; 106. Third infusion pipe; 160. First spray hole; 107. Liquid inlet; 108. Air inlet; 200. Heat exchanger; 300. Air inlet pipe; 400. Liquid inlet pipe; 500. One-way valve; 600. Wastewater tank; 700. Blower; 800. Circulation pump; 900. Liquid outlet pipe. Detailed Implementation

[0046] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, they are provided to make this application more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art.

[0047] In this application, 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 application, "multiple" means two or more, unless otherwise explicitly specified.

[0048] In this application, unless otherwise expressly specified and limited, the terms "assembly," "connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0049] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a thorough understanding of embodiments of this application. However, those skilled in the art will recognize that the technical solutions of this application can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this application.

[0050] Figure 1 A schematic diagram of the copper melting vessel in Embodiment 1 or Embodiment 2 of this application is shown; Figure 2 A schematic diagram of the copper melting system in Embodiment 1 or Embodiment 2 of this application is shown; Figure 3 This illustration shows a schematic diagram of the tank body unfolding and the second infusion pipe being disposed on the tank body in Embodiment 1 or Embodiment 2 of this application; Figure 4 A cross-sectional structural diagram of the first spray hole opened on the third infusion tube in Embodiment 1 or Embodiment 2 of this application is shown.

[0051] Example 1

[0052] Embodiment 1 of this application provides a copper melting pot 100, which can be used to hold copper wires. The copper melting pot 100 includes a pot body 101, as shown below. Figure 1 or Figure 2 As shown, the tank 101 can be cylindrical, conical, or frustum-shaped. The tank 101 has interconnected inlets and outlets. The tank 101 can be made of materials such as titanium or 316L stainless steel to ensure the overall strength of the tank 101.

[0053] Among them, such as Figure 1 and Figure 2 As shown, this copper melting vessel 100 also includes:

[0054] At least one filter screen is provided inside the tank 101. The filter screen is arranged along the axial direction of the tank 101 and has multiple through holes 120. Copper wires can be inserted through these through holes 120, that is, the copper wires are inserted vertically or perpendicularly into these through holes 120, so that the copper wires are fixed vertically or perpendicularly inside the tank 101 and dissolved by the electrolyte.

[0055] A support member 103 is disposed inside the tank 101, located on the side of the filter screen near the outlet, and spaced apart from the filter screen. The support member 103 includes a support portion 130 and a supporting portion 131, arranged sequentially from the inlet to the outlet, with the support portion 130 positioned above the supporting portion 131. The side of the support portion 130 away from the outlet abuts against the copper wire, meaning the copper wire is supported on the support portion 130. The outer edge of the support portion 130 abuts against the inner wall of the tank 101 to prevent the copper wire from leaking out through gaps, ensuring effective copper dissolution. The support portion 130 extends towards the filter screen and has multiple spaced through holes for the flow of electrolyte and the electrolyte after copper dissolution. The diameter of these through holes is smaller than the size of the copper wire to prevent leakage and ensure effective copper dissolution. One end of the support 131 abuts against the side of the carrier 130 away from the filter screen, and the other end abuts against the bottom wall of the tank 101. That is, the support 131 supports the carrier 130 inside the tank 101. The support 131 can be fixedly connected to the bottom wall of the tank 101 by welding to ensure the tightness of the connection between the support 131 and the tank 101, and to ensure that the carrier 130 is stably fixed inside the tank 101, thereby ensuring that the copper wire is stably placed inside the tank 101.

[0056] The first infusion pipe 104 is located at the inlet of the tank 101 and can spray electrolyte toward the filter screen to dissolve the copper wires in the through hole 120; that is, the first infusion pipe 104 is located at the top of the tank 101 and can dissolve the copper wires on the filter screen from the top down.

[0057] The second infusion pipe 105 is located on the inner wall of the tank 101 and extends along the axial direction of the tank 101. The second infusion pipe 105 is spaced apart from the side of the support part 130 away from the support part 131, i.e., there is a gap between the second infusion pipe 105 and the support part 130. The second infusion pipe 105 can improve the spraying of the side of the copper wire, increase the spraying range, increase the dissolution rate of the copper wire, and reduce the spraying dead angle.

[0058] The third infusion tube 106 is located on the side of the filter screen near the outlet, that is, the third infusion tube 106 is located below the filter screen, and the third infusion tube 106 can be fixedly connected to the filter screen by welding; the third infusion tube 106 is arranged along the edge contour of the through hole 120, that is, the third infusion tube 106 is arranged along the gap between the through holes, so as to spray the copper wire located at the position of the through hole 120 and the copper wire located below the through hole 120, dissolving the copper wire, thereby reducing the area that the second infusion tube 105 on the side cannot spray, and thus increasing the spraying range of the copper wire.

[0059] The present application solution adds a first infusion pipe 104, a second infusion pipe 105, and a third infusion pipe 106 to the top, side, and adjacent positions of the copper wire, respectively, so as to reduce the dead angle of electrolyte spraying on the copper wire and thereby improve the dissolution rate of the copper wire.

[0060] Further, see Figure 1 As shown, in the direction from outlet to inlet, the cross-sectional area of ​​the support portion 130 in the radial direction of the tank body 101 gradually decreases; that is, the support portion 130 can be in the form of a pyramid, cone, or frustum. Furthermore, the support portion 130 protrudes towards the inlet, and has an inclined surface in the direction from inlet to outlet. When the copper wire is located on this inclined surface, the second liquid delivery pipe 105 located on the side and the third liquid delivery pipe 106 located below the filter screen spray the copper wire, enabling rapid dissolution of the copper wire at the edge. The copper wire slides downwards along the inclined surface and is rapidly dissolved through the second liquid delivery pipe 105, thereby increasing the dissolution rate of the copper wire.

[0061] It is worth mentioning that the support part 130 is designed as a pyramid, cone or frustum structure. The copper wire at the edge is gradually dissolved by the electrolyte in the second liquid infusion pipe 105. With the inclined design of the support part 130, the dissolved copper wire can slide down along the inclined surface of the support part 130. During the downward sliding process, the second liquid infusion pipe 105 on the side wall of the tank 101 continuously sprays the copper wire to quickly dissolve the copper wire at the edge.

[0062] In the embodiments of this application, see Figure 1 As shown, the support part 130 has a conical structure with its cone angle facing the side of the filter screen. That is to say, the support part 130 has a downward inclined surface in the direction from the inlet to the outlet. The dissolved copper wire will gradually slide down on this support part 130, and the second liquid infusion pipe 105 on the side wall of the tank 101 will spray the copper wire that is gradually sliding down, thereby increasing the dissolution rate of the copper wire.

[0063] Among them, see Figure 1 or Figure 2As shown, in a cross-section along the axial direction of the tank 101, the supporting part 130 and the inner wall of the tank 101 form an angle α, which ranges from 30° to 75°. That is, the inclined surface of the supporting part 130 forms an angle α of 30° to 75° with the inner wall of the tank 101, for example, it can be 30°, 45°, 60°, 75°, etc.

[0064] Understandably, the smaller the angle α, the steeper the slope formed by the support portion 130, and the faster the copper wire slides on this slope after melting; the larger the angle α, the gentler the slope formed by the support portion 130, and the slower the copper wire slides on this slope after melting.

[0065] Correspondingly, the cross-section of this support part 130 in the axial direction of the tank is triangular, and the included angle of this triangle facing the filter screen side is complementary to the aforementioned included angle α, that is, the included angle ranges from 105° to 150°.

[0066] In this embodiment, the included angle α is 60°, and the cross-section of the bearing part 130 in the axial direction of the tank body 101 is triangular, with an included angle of 120° towards the filter screen side.

[0067] Among them, see Figure 1 or Figure 2 As shown, the carrier 103 also includes at least one support ring 132. The support ring 132 has the same cross-section as the carrier portion 130 in the radial direction of the tank 101, that is, the support ring 132 adopts a circular ring structure. The support rings 132 are arranged in the axial direction of the tank 101, and the side edge of each support ring 132 abuts against the inner wall of the carrier portion 130 near the outlet. The lower edge of each support ring 132 abuts against the end of the plurality of support portions 131 near the filter screen, that is, the support portion 131 abuts against the carrier portion 130 through the support ring 132. The support ring 132 can prevent the lateral compressive force that causes the bearing portion 130 to be squeezed inward, thereby improving the bearing capacity of the bearing portion 130 and preventing the bearing portion 130 from bending inward due to the weight of the copper wire and electrolyte. The support portion 131 provides an upward supporting force to the support ring 132, thereby providing an upward supporting force to the bearing portion 130, which can also prevent the bearing portion 130 from bending inward and improve the bearing capacity of the bearing portion 130.

[0068] In other words, the support portion 130 can be stably maintained inside the tank 101 by the support ring 132 and the support portion 131, so as to prevent the support portion 130 from shaking and ensure its stability.

[0069] It is worth mentioning that this support part 131 has a straight structure and extends along the axis of the tank body 101, that is, this support part 131 is perpendicular to the bottom wall of the tank body 101.

[0070] In addition, in order to improve the load-bearing capacity of the bearing portion 130, each ring has a plurality of support portions 131, and the adjacent support portions 131 are evenly arranged so that the bearing portion 130 is subjected to uniform force at each position.

[0071] For example, see Figure 1 or Figure 2 As shown, this support member 103 includes two support rings 132, which are spaced apart along the axial direction of the tank body 101. The first support ring 132 is closer to the filter screen than the second support ring 132; that is, the first support ring 132 is located above the second support ring 132. Furthermore, because this support part 130 adopts a conical structure, the diameter of the first support ring 132 is smaller than the diameter of the second support ring 132. Support parts 131 are designed along the lower edge of the support rings 132, and eight support parts 131 abut against both the first and second support rings 132, for a total of sixteen support parts 131. The eight support parts 131 are evenly spaced along the circumferential direction of the support rings 132 to provide uniform support force to the support part 130, ensuring uniform stress on the support part 130 and preventing twisting.

[0072] It is understandable that multiple support rings 132 can be provided in this bearing part 130 to improve the bearing capacity of the bearing part 130, thereby avoiding problems such as twisting of the bearing part 130.

[0073] In addition, a support portion 131 is also provided at the bottom of this bearing portion 130 to ensure support for the bearing portion 130.

[0074] To further improve the spray coverage of the copper wire, see Figure 1 , Figure 2 and Figure 3 As shown, the tank 101 is provided with a plurality of second infusion pipes 105, and the plurality of second infusion pipes 105 are arranged sequentially at intervals in the circumferential direction of the tank 101 so as to spray the side of the copper wire at a 360° angle, thereby improving the dissolution rate of the copper wire.

[0075] For example, see Figure 3 As shown, eight second infusion tubes 105 are arranged sequentially and evenly at intervals in the circumferential direction of the tank body 101.

[0076] Furthermore, this second infusion tube 105 can be in a straight or curved shape.

[0077] For example, the second infusion pipe 105 extends along the axial direction of the tank body 101, and the axis of this second infusion pipe 105 is parallel to the axis of the tank body 101. See [reference needed]. Figure 1 or Figure 3 As shown; the second infusion tube 105 is bent in the direction from the inlet to the outlet, that is, the second infusion tube 105 is arranged in a serpentine shape.

[0078] The second infusion pipe 105 can be fixedly connected to the side wall of the tank 101 by welding.

[0079] In the embodiments of this application, see Figure 1 or Figure 2 As shown, the copper melting tank 100 includes a first filter screen 102a and a second filter screen 102b. The first filter screen 102a and the second filter screen 102b are arranged sequentially at intervals along the axial direction of the tank body 101, and the first filter screen 102a is located on the side of the second filter screen 102b closer to the inlet. Copper wires are placed in the through holes 120 of the first filter screen 102a and the second filter screen 102b, and the diameter of the through hole 120 of the first filter screen 102a is larger than the diameter of the through hole 120 of the second filter screen 102b, so that the size of the copper wire gradually decreases from top to bottom. The copper wire at the bottom can be dissolved first, and then the copper wire gradually slides down along the inclined surface of the support part 130 to gradually dissolve the copper wire, resulting in a better dissolution effect.

[0080] For example, the diameter of the through hole 120 of the first filter 102a is twice the diameter of the through hole 120 of the second filter 102b.

[0081] It is understandable that the third infusion tube 106 is set along the edge contour of the through hole 120. The smaller the diameter of the through hole 120, the wider the area covered by the third infusion tube 106, and the better the copper wire located in the through hole 120 can be dissolved. Therefore, the copper wire can be dissolved finely, and the copper wire can be gradually decomposed from top to bottom, which increases the dissolution time and improves the dissolution effect.

[0082] In addition, the tank 101 is equipped with multiple layers of filter screens, and the through holes 120 on the filter screens gradually decrease in size from the inlet to the outlet direction, so as to dissolve the copper wire more finely and improve the dissolution rate of the copper wire.

[0083] Among them, see Figure 1 or Figure 2 As shown, both the first filter 102a and the second filter 102b include a plurality of first grid lines 121 arranged sequentially at intervals in the first direction and a plurality of second grid lines 122 arranged sequentially at intervals in the second direction. The first direction and the second direction intersect, and a through hole 120 of square or rhomboid shape is formed between two adjacent first grid lines 121 and two adjacent second grid lines 122.

[0084] For example, the first direction and the second direction are perpendicular to each other. The first grid line 121 extends in the second direction, and a plurality of first grid lines 121 are arranged at intervals in the first direction. Correspondingly, the second grid line 122 extends in the first direction, and a plurality of second grid lines 122 are arranged at intervals in the second direction. The filter screen also includes an outer frame, and the outer ends of the first grid line 121 and the outer ends of the second grid line 122 are connected to the outer frame.

[0085] It should be noted that, in order to fix the first filter screen 102a and the second filter screen 102b inside the tank 101, a fixing position is formed on the inner side wall of the tank 101, and the first filter screen 102a and the second filter screen 102b are fixed at this fixing position.

[0086] In addition, the first filter 102a and the second filter 102b are provided with clearance openings to avoid the second infusion tube 105, so as to ensure the installation effect during installation.

[0087] It is understandable that when there are multiple filters inside the tank 101, in order to facilitate the installation of the filters and ensure the fixing effect of the filters, they can be installed one layer at a time. That is, the bottom layer of filters can be installed first, and then the upper layer of filters can be installed, so as to fix the filters inside the tank 101.

[0088] Both the first filter screen 102a and the second filter screen 102b are equipped with a third infusion tube 106, which is arranged along the extension direction of the first grid line 121 and the extension direction of the second grid line 122. In other words, the third infusion tube 106 is arranged according to the positions of the first grid line 121 and the second grid line 122, allowing it to spray the copper wires at each through hole 120, reducing the area that the first infusion tube 104 and the second infusion tube 105 cannot reach, thereby reducing spray dead zones and improving the dissolution rate of the copper wires.

[0089] Among them, see Figure 4 As shown, the third infusion tube 106 is provided with a plurality of first spray holes 160. The plurality of first spray holes 160 are arranged sequentially at intervals in the circumferential direction of the third infusion tube 106, and the spray holes are located in the third infusion tube 106 near the through hole 120, so as to spray electrolyte onto the copper wire at the position of the through hole 120, reduce the spray dead angle, and improve the dissolution rate of the copper wire.

[0090] In this embodiment, the third infusion tube 106 is fixed to the first grid line 121 and the second grid line 122 by welding; see also Figure 4As shown, the third infusion tube 106 is provided with three first spray holes 160, and the angle formed by adjacent first spray holes 160 is 90°. That is, the three first spray holes 160 are located at the bottom and both sides of the third infusion tube 106, respectively. The copper wires in the through hole 120 can be sprayed through the first spray holes 160 on both sides. The spray range of the electrolyte is increased by using the first spray holes 160, the spray dead angle is reduced, and the dissolution rate of the copper wires is increased.

[0091] It is understandable that, in order to improve the dissolution effect on copper wire, the third infusion tube 106 may also be provided with multiple first spray holes 160, which are spaced apart in the circumferential direction of the third infusion tube 106.

[0092] Furthermore, the copper dissolving tank 100 also includes a spray head, which is located on the side of the first infusion pipe 104 near the filter screen. The spray head is connected to the first infusion pipe 104, and the electrolyte in the first infusion pipe 104 is sprayed out through the spray head. The spray range of the spray head can cover the filter screen to dissolve the copper wires inserted in the filter screen through holes 120. The spray range of the spray head can be umbrella-shaped, and the spray head is located in the axial direction of the tank body 101, that is, the spray head is located in the center of the tank body 101, which can completely dissolve the copper wires below the spray head.

[0093] It should be noted that this spray head can rotate relative to the first infusion tube 104 to improve its spraying effect.

[0094] In addition, the first infusion tube 104 can be located at the middle of the top of the tank 101 to cover a larger area and ensure the dissolution effect on the copper wire.

[0095] It is worth mentioning that the first infusion tube 104 and the second infusion tube 105 are interconnected. The electrolyte in the first infusion tube 104 can be transported to the second infusion tube 105 and then sprayed out through the second spray hole on the second infusion tube 105.

[0096] The second spray hole can also be designed according to the design position of the first spray hole 160. That is, multiple second spray holes can be provided on the second infusion pipe 105 and arranged at intervals in the circumferential direction of the second infusion pipe 105.

[0097] It should be noted that the diameter of the second spray hole is larger than that of the first spray hole 160, so that the spray range of the second spray hole is large enough to dissolve the copper wire and ensure the dissolution effect of the copper wire.

[0098] In addition, the first infusion tube 104 can be connected to the second infusion tube 105 through eight branch tubes respectively. The diameter of the first infusion tube 104 is larger than the diameter of the second infusion tube 105 to ensure sufficient electrolyte flow.

[0099] Further, see Figure 2 As shown, the tank 101 is also equipped with a liquid inlet 107 and an air inlet 108. The liquid inlet 107 can be connected to the liquid inlet pipe 400, which is connected to the third liquid delivery pipe 106 through the liquid inlet 107, and can deliver electrolyte into the third liquid delivery pipe 106. The air outlet of the air inlet 108 can be connected to the air inlet pipe 300, which is connected to the third liquid delivery pipe 106 through the air inlet 108, and can deliver air into the third liquid delivery pipe 106 to increase the oxygen content in the tank 101, thereby improving the oxidation effect on the copper wire and effectively increasing the copper dissolution rate.

[0100] Among them, see Figure 2 As shown, a heat exchanger 200 can be installed on this air inlet duct 300, which can exchange the heat generated by the electrolyte and copper wire to the air inlet duct 300, so that the air entering the third liquid delivery pipe 106 is hot air, which can effectively increase the copper dissolution rate. When the copper dissolution rate is too fast, the flow rate of the electrolyte in the liquid inlet duct 400 can be adjusted to increase the air in the air inlet duct 300, thereby increasing the oxidation effect of the air on the copper foil, and thus reducing the copper dissolution rate.

[0101] In the existing technology, copper wires are dissolved by spraying from the top of the copper dissolving tank 100. When the copper ion content in the electrolyte is close to saturation, the copper wires are dissolved from top to bottom by the electrolyte, which is affected by temperature. This causes crystallization to easily occur at the bottom and middle of the tank 101. Moreover, the crystallization will increase over time and is not easy to dissolve, which seriously affects the copper dissolving rate.

[0102] When crystals are present in the middle and bottom of the tank 101, the flow rate of the electrolyte in the inlet pipe 400 can be increased and steam can be added to the blower 700. The steam enters the third liquid delivery pipe 106 through the air inlet pipe 300. This allows the addition of steam to the electrolyte, increases the temperature of the electrolyte, and can quickly eliminate the crystals inside the tank 101. This can prevent the crystals from affecting the copper dissolution rate and thus improve the dissolution rate of the copper wire.

[0103] It is worth mentioning that the air inlet 108 and the liquid inlet 107 are respectively located at opposite ends of the tank body 101 to avoid mutual interference between the liquid inlet pipe 400 and the air inlet pipe 300.

[0104] To prevent electrolyte and air or steam backflow, both the liquid inlet pipe 400 and the air inlet pipe 300 are equipped with check valves 500.

[0105] The filter, carrier 103, first infusion tube 104, second infusion tube 105 and third infusion tube 106 are made of materials such as titanium or 316L stainless steel to avoid the electrolyte from reacting with them and to ensure the purity of the dissolved copper.

[0106] In addition, the electrolyte after copper dissolution flows back to the waste liquid tank 600 for storage; when copper wire needs to be dissolved, the electrolyte in the waste liquid tank 600 is pumped into the tank body 101 by the circulation pump 800 to dissolve the copper wire.

[0107] Understandably, the electrolyte flowing back to the wastewater tank 600 has a relatively high temperature, approximately between 67°C and 68°C. To lower its temperature, the heat exchanger 200 can be used to exchange the heat of the electrolyte flowing back to the wastewater tank 600 with the air in the air inlet duct 300, thereby increasing the temperature of the air in the air inlet duct 300 and thus increasing the dissolution rate of the copper wire.

[0108] Example 2

[0109] Embodiment 2 of this application provides a copper melting system 10, see [link to embodiment 2]. Figure 2 As shown, it includes a waste liquid tank 600, a blower 700, a heat exchanger 200, and at least two sets of copper melting tanks 100 as described in Example 1.

[0110] The copper melting tank 100 includes the structure described in Embodiment 1, comprising a tank body 101, at least one filter screen, a carrier 103, a first infusion tube 104, a second infusion tube 105, and a third infusion tube 106. The specific structure can be referred to in Embodiment 1, and will not be repeated here.

[0111] See Figure 2 As shown, this tank 101 is equipped with an inlet, an outlet, a liquid inlet 107, an air inlet 108, and a circulation port. At least two sets of tanks 101 are arranged sequentially in a third direction. The first tank 101 is connected to the wastewater tank 600 through a circulation pump 800. The circulation port of the first tank 101 is connected to the inlet and liquid inlet 107 of its adjacent tank 101 through the circulation pump 800. Furthermore, the circulation port of one of the adjacent tanks 101 is connected to the inlet and liquid inlet 107 of the other adjacent tank 101. The outlet is connected to the sludge tank 600 through the liquid outlet pipe 900. The liquid outlet pipe 900 is equipped with a heat exchanger 200, which can exchange heat in the liquid outlet pipe 900 with heat in the air inlet pipe 300. The circulating pump 800 is connected to the inlet and liquid inlet 107 through the liquid inlet pipe 400. The blower 700 is connected to the air inlet 108 of each tank 101 through the air inlet pipe 300. In order to avoid backflow, both the liquid inlet pipe 400 and the air inlet pipe 300 are equipped with a one-way valve 500.

[0112] For example, see Figure 2 As shown, this copper melting system 10 includes two sets of copper melting tanks 100, which are arranged sequentially at intervals in the horizontal direction, namely the first copper melting tank 100 and the second copper melting tank 100. The first copper melting tank 100 and the second copper melting tank 100 have the same structure, which can be referred to in the description of the copper melting tank 100 in Embodiment 1.

[0113] Among them, see Figure 2 As shown, the first tank body 101a of the first copper melting tank 100 is connected to the waste liquid tank 600 via a first circulation pump 800. The first circulation pump 800 transports the electrolyte in the waste liquid tank 600 to the inlet and inlet port 107 of the first tank body 101a through the inlet pipe 400. The inlet of the first tank body 101a is connected to the first delivery pipe in the first copper melting tank 100, and the inlet port 107 of the first tank body 101a is connected to the third delivery pipe of the first copper melting tank 100. When there are multiple layers of filter screens in the first tank body 101a, the inlet pipe 400 can be divided into multiple branch pipes to connect to different layers of filter screens respectively. For example, if the first copper melting tank 100 includes two layers of filter screens, the inlet pipe 400 has two corresponding branch pipes; if the first copper melting tank 100 includes three layers of filter screens, the inlet pipe 400 has three corresponding branch pipes to correspond to different layers of filter screens respectively.

[0114] The second copper dissolving tank 100 can adopt the same structure as the first copper dissolving tank 100. The inlet and liquid inlet 107 of the second tank body 101b of the second copper dissolving tank 100 are connected to the circulation port of the first tank body 101a through the second circulation pump 800, so as to draw the electrolyte dissolved in the first copper dissolving tank 100 into the second copper dissolving tank 100 to further dissolve the copper wire and increase the copper ion content in the electrolyte.

[0115] See Figure 2 As shown, the outlets of the first tank 101a and the second tank 101b are both connected to the waste liquid tank 600 through the liquid outlet pipe 900. Each liquid outlet pipe 900 is equipped with a heat exchanger 200. The air delivered by the blower 700 exchanges heat with the first heat exchanger 200 and the second heat exchanger 200, and then they are combined and distributed to each copper melting tank 100.

[0116] In other words, see Figure 2 As shown, the air or steam delivered by the blower 700 passes through the first heat exchanger 200 and the second heat exchanger 200 respectively before being combined. The combined air or steam is then distributed to the third liquid delivery pipe 106 of the first tank 101a and the second tank 101b. By passing the air or steam in the blower 700 through different heat exchangers 200, the heat exchange effect can be improved and heat exchange time can be saved.

[0117] Understandably, when there are multiple filter layers, the air inlet duct 300 will have the same number of branches as the liquid inlet duct 400; for example, when there are two filter layers, the air inlet duct 300 will have two branches, see [reference needed]. Figure 2 As shown; when it has a three-layer filter, this air inlet duct 300 has three branches.

[0118] It should be noted that by introducing electrolyte and air through the liquid inlet 107 and air inlet 108 respectively, an air-containing electrolyte is formed in the third liquid delivery pipe 106, which can effectively increase the copper dissolution rate. When the copper dissolution rate is too fast, the flow rate of electrolyte in the liquid inlet pipe 400 can be reduced, while the air in the air inlet pipe 300 can be increased, thereby increasing the oxidation effect of air on the copper foil and thus reducing the copper dissolution rate.

[0119] In the existing technology, copper wires are dissolved by spraying from the top of the copper dissolving tank 100. When the copper ion content in the electrolyte is close to saturation, the copper wires are dissolved from top to bottom by the electrolyte, which is affected by temperature. This causes crystallization to easily occur at the bottom and middle of the tank 101. Moreover, the crystallization will increase over time and is not easy to dissolve, which seriously affects the copper dissolving rate.

[0120] When crystals are present in the middle or bottom of the tank 101, the flow rate of the electrolyte in the inlet pipe 400 can be increased, and steam can be introduced into the blower 700. The steam enters the third liquid delivery pipe 106 through the air inlet pipe 300. This can increase the temperature of the electrolyte and quickly eliminate the crystals inside the tank 101, thereby preventing the crystals from affecting the copper dissolution rate and thus improving the dissolution rate of the copper wire.

[0121] In the description of this specification, references to terms such as "some embodiments," "exemplarily," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. The illustrative expressions of the above terms in this specification do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0122] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application. Therefore, any changes or modifications made in accordance with the claims and description of this application should fall within the scope of this patent application.

Claims

1. A copper melting vessel, the copper melting vessel comprising a vessel body, the vessel body having an inlet and an outlet communicating with each other; characterized in that, The copper melting vessel also includes: At least one filter screen is disposed inside the tank, and the at least one filter screen is arranged in the axial direction of the tank. The filter screen is provided with multiple through holes, and copper wires are inserted into the through holes. A support member is disposed inside the tank, located on the side of the filter screen near the outlet, and spaced apart from the filter screen. The support member includes a support portion and a supporting portion arranged sequentially in the direction from the inlet to the outlet. The support portion abuts against the inner wall of the tank and extends toward the filter screen. The copper wire is supported on the side of the support portion away from the outlet. The support portion has multiple spaced through holes. One end of the supporting portion abuts against the side of the support portion away from the filter screen, and the other end of the supporting portion abuts against the bottom wall of the tank. The first infusion tube is located at the inlet and sprays electrolyte toward the copper wire; The second infusion tube is disposed on the inner wall of the tank and extends along the axial direction of the tank. The second infusion tube is spaced apart from the side of the bearing part away from the support part. The third infusion tube is located on the side of the filter screen near the outlet and is arranged along the edge contour of the through hole.

2. The copper melting pot according to claim 1, characterized in that, In the direction from the outlet to the inlet, the cross-sectional area of ​​the supporting part in the radial direction of the tank gradually decreases.

3. The copper melting pot according to claim 2, characterized in that, The cross-section of the support part in the direction of the tank axis is triangular, and the included angle of the triangle facing the filter screen ranges from 105° to 150°.

4. The copper melting pot according to any one of claims 1 to 3, characterized in that, The carrier also includes at least one support ring, and at least one support ring is arranged in the axial direction of the tank body, and the support ring abuts against the inner wall of the carrier part near the outlet side; Each of the support rings abuts against one end of the plurality of support portions near the filter screen.

5. The copper melting pot according to claim 1, characterized in that, Multiple second infusion tubes are arranged sequentially at intervals in the circumferential direction of the tank; The second infusion tube extends linearly along the axial direction of the tank body; and / or The second infusion tube is bent and extended in the direction from the inlet to the outlet.

6. The copper melting pot according to claim 1, characterized in that, The copper melting tank includes a first filter screen and a second filter screen, which are arranged alternately in the direction from the inlet to the outlet. Both the first filter and the second filter include a plurality of first grid lines arranged at intervals in a first direction and a plurality of second grid lines arranged at intervals in a second direction. The first direction and the second direction intersect, and two adjacent first grid lines and two adjacent second grid lines form the through hole. The area of ​​the through holes on the first filter screen is larger than the area of ​​the through holes on the second filter screen; The third infusion tube is provided on both the first filter screen and the second filter screen, and the third infusion tube is arranged along the extension direction of the first grid line and the second grid line.

7. The copper melting pot according to claim 6, characterized in that, The third infusion tube is provided with a plurality of first spray holes, which are arranged sequentially at intervals in the circumferential direction of the third infusion tube. The third infusion tube is welded to the first grid line and the second grid line.

8. The copper melting pot according to claim 7, characterized in that, The copper melting tank also includes a spray head, which is located on the side of the first infusion tube near the filter screen, and the spray range of the spray head covers the filter screen; The first infusion tube is connected to the second infusion tube, and the second infusion tube is provided with at least one second spray hole, which faces the inside of the tank.

9. The copper melting pot according to claim 1, characterized in that, The tank body is also provided with a liquid inlet and an air inlet, which are respectively located at opposite ends of the tank body. The liquid inlet is connected to the third infusion pipe, and the air inlet is connected to the third infusion pipe.

10. A copper dissolving system, characterized in that, include: Wastewater tank; A blower, the blower including an air outlet, the air outlet being connected to an air inlet pipe; A heat exchanger, which is connected to the air inlet duct; At least two sets of copper melting tanks as described in any one of claims 1 to 9, each copper melting tank comprising a tank body, the tank body being provided with an inlet, an outlet, a liquid inlet, an air inlet, and a circulation port, the at least two sets of tank bodies being arranged sequentially in a third direction, the first tank body being connected to the wastewater tank via a circulation pump, the circulation port of the first tank body being connected to the inlet and liquid inlet of its adjacent tank body via the circulation pump, and the circulation port of one of the adjacent tank bodies being connected to the inlet and liquid inlet of the other of the adjacent tank bodies; the outlet of each tank body being connected to the wastewater tank via an outlet pipe, the outlet pipe being provided with the heat exchanger, the heat exchanger being capable of exchanging heat in the outlet pipe with heat in the air inlet pipe; the circulation pump being connected to the inlet and liquid inlet via the inlet pipe, and the blower being connected to the air inlet of each tank body via the air inlet pipe; Both the liquid inlet pipe and the air inlet pipe are equipped with one-way valves.

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