Device for separating and recycling copper and tin in waste circuit board leachate

Abstract

The utility model provides a device for separating and recycling copper and tin in a waste circuit board leaching solution. The device comprises a tank body, a stirring device, a closed switch valve and an isolating device arranged at the lower part of the tank body, the isolation device comprises a plurality of fixed plates, movable plates arranged between every two adjacent fixed plates, connecting supports connected with the movable plates and connecting shafts connected with the connecting supports. The closed switch valve comprises a valve body, a valve element and a wheel disc used for driving the valve element to rotate. The top of the valve element is provided with a first buckle, the connecting shaft extends into the valve body, the bottom of the connecting shaft is provided with a second buckle, and the valve body is correspondingly provided with a first clamping groove and a second clamping groove which are correspondingly connected with the first buckle and the second buckle in a clamped mode. By means of the arrangement, the closed switch valve at the bottom is controlled, the movable plate in the tank body is controlled to be unfolded or contained in the fixed plate, switching of the communicating / isolating state of the upper portion and the lower portion in the tank body is achieved, and finally separation and recovery of Cu and Sn in the waste circuit board leachate are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of metal recovery in waste circuit boards, in particular to a device for separating and recovering copper and tin in a leaching solution of waste circuit boards. Background Art

[0002] With the advancement of technology, the frequency of updating various household appliances has accelerated, and more and more electronic waste has been generated. As the core components, waste circuit boards contain a large amount of precious metals and have a high recycling value. At present, the metal recovery from waste circuit boards is mainly based on hydrometallurgical technology and pyrometallurgical technology. In the process of hydrometallurgical recovery, due to the similarity of the activity of metals Cu and Sn, the two appear together in the leachate, making it inconvenient to recover them separately.

[0003] In view of this, it is necessary to design a device for separating and recovering copper and tin in the leaching solution of waste circuit boards to solve the above problems. Utility Model Content

[0004] In order to efficiently separate and recover metals in the process of recycling waste circuit boards, the utility model provides a device for separating and recovering copper and tin in the leaching solution of waste circuit boards, which can separate Cu and Sn from the waste circuit boards during the leaching process, providing convenient conditions for subsequent recovery and purification.

[0005] To achieve the above-mentioned utility model purpose, the utility model provides a copper and tin separation and recovery device in the leachate of waste circuit boards, comprising a tank body, a stirring device, a closed switch valve arranged at the bottom of the tank body, a discharge valve, and a feed pipe, an air inlet pipe, and a discharge pipe connected to the tank body; the upper part, the middle part, and the lower part of the tank body are respectively provided with a first filter screen, a second filter screen, and a third filter screen; the copper and tin separation and recovery device in the leachate of waste circuit boards also includes an isolation device arranged at the lower part of the tank body, the isolation device includes a plurality of fixed plates, a movable plate arranged between two adjacent fixed plates, a connecting bracket connected to the movable plate, and a connecting shaft connected to the connecting bracket; the closed switch valve includes a valve body, a valve core threadedly connected to the valve body, and a wheel for driving the valve core to rotate, and the top of the valve core has a first buckle; the connecting shaft extends to the inside of the valve body, and the bottom of the connecting shaft is provided with a second buckle; the valve body is correspondingly provided with a first card slot and a second card slot correspondingly connected to the first card slot and the second card slot.

[0006] As a further improvement of the present invention, the number of the fixed plates and the number of the movable plates are both four; the fixed plates are hollow, and the fixed plates have a receiving space for receiving the movable plates.

[0007] As a further improvement of the utility model, the connecting bracket includes four horizontal rods connected to the upper end of the connecting shaft, and a driving rod connecting the horizontal rods and the movable plate.

[0008] As a further improvement of the present invention, the horizontal height of the fixed plate and the movable plate is located between the second filter screen and the third filter screen.

[0009] As a further improvement of the utility model, the air inlet end of the air inlet pipe is connected to the blower, and the air outlet end of the air inlet pipe is connected to a circular air diffusion pipe, and the circular air diffusion pipe is provided with a plurality of air outlets.

[0010] As a further improvement of the utility model, the circular air diffusion pipe is arranged above the fixed plate.

[0011] As a further improvement of the present invention, the feed pipe extends to the interior of the tank body.

[0012] As a further improvement of the utility model, one end of the drain pipe extends to above the first filter screen, and the other end is connected to the copper extraction, separation and recovery device.

[0013] As a further improvement of the present invention, the stirring device includes a motor with a driving shaft, a stirring rod driven by the driving shaft, and an impeller arranged on the stirring rod.

[0014] As a further improvement of the present invention, the first filter screen and the second filter screen are sleeved on the stirring rod, and a sealing ring and a sealing bearing are provided at the connection between the first filter screen, the second filter screen and the stirring rod.

[0015] The beneficial effects of the utility model are:

[0016] The utility model provides a device for separating and recovering copper and tin in the waste circuit board leachate. By arranging an isolation device and a closed switch valve in the tank body, the closed switch valve at the bottom is controlled to control the movable plate in the tank body to be unfolded or accommodated in the fixed plate, so as to realize the switching of the upper and lower connected / isolated states in the tank body. Specifically, when separating and recovering Cu and Sn in the waste circuit board leachate, the liquid first flows into the tank body from the feed pipe. With the slow addition of air, at a certain stirring speed, the metal Sn in the leachate is oxidized to form a precipitate, which is isolated at the bottom of the tank body by the filter screen. By controlling the closed switch valve at the bottom, the movable plate in the tank body is opened to isolate the precipitate from the liquid, and then the precipitate is taken out through the discharge valve to realize the recovery of the metal Sn. The liquid after the Sn precipitation is connected to the outside through the top layer discharge pipe and discharged to extract and recover Cu, and finally realize the separation and recovery of Cu and Sn in the waste circuit board leachate.

[0017] The utility model has reasonable design, simple principle, convenient production operation, easy realization and good separation effect, can shorten the process flow of metal recovery in waste circuit boards and realize continuous production. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The utility model is a schematic diagram of the structure of the device for separating and recovering copper and tin in the leaching solution of waste circuit boards.

[0019] Figure 2 for Figure 1 Schematic diagram of the structure of the closed switching valve.

[0020] Figure 3 for Figure 1 Schematic diagram of the structure of the isolation device. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] It should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only structures and / or processing steps closely related to the scheme of the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0023] In addition, it should be noted that the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0024] See also Figures 1 to 3 As shown, the utility model provides a copper and tin separation and recovery device 100 in the leachate of waste circuit boards, comprising a tank body 1, a stirring device arranged in the tank body 1, a closed switch valve 2 arranged at the bottom of the tank body 1, a discharge valve 9, and a feed pipe 11, an air intake pipe 12, and a discharge pipe 13 connected to the tank body 1. The feed pipe 11 extends to the inside of the tank body 1. The air intake end of the air intake pipe 12 is connected to the blower, and the air outlet end of the air intake pipe 12 is connected to a circular diffuser pipe 8, and a plurality of air outlets 81 are provided on the circular diffuser pipe 8.

[0025] The stirring device includes a motor 53 having a driving shaft, a stirring rod 52 driven by the driving shaft, and an impeller 51 disposed on the stirring rod 52. The stirring rod 52 extends to a height close to that of the circular air diffusion pipe 8.

[0026] The upper, middle and lower parts of the tank body 1 are respectively provided with a first filter screen 41, a second filter screen 42 and a third filter screen 43. One end of the drain pipe 13 extends to the top of the first filter screen 41, and the other end is connected to the copper extraction separation recovery device. The first filter screen 41 and the second filter screen 42 are sleeved on the stirring rod 52, and a sealing ring 6 and a sealing bearing 7 are provided at the connection between the first filter screen 41, the second filter screen 42 and the stirring rod 52. The first filter screen 41, the second filter screen 42 and the third filter screen 43 are all made of stainless steel (type 304).

[0027] The copper and tin separation and recovery device 100 in the waste circuit board leachate also includes an isolation device arranged at the lower part of the tank body 1. The isolation device includes a plurality of fixed plates 32, a movable plate 31 arranged between two adjacent fixed plates 32, a connecting bracket connected to the movable plate 31, and a connecting shaft 33 connected to the connecting bracket. The horizontal height of the fixed plate 32 and the movable plate 31 is located between the second filter screen 42 and the third filter screen 43. The circular diffuser 8 is arranged above the fixed plate 32.

[0028] In this embodiment, the number of the fixed plate 32 and the movable plate 31 are both four. The fixed plate 32 is hollow, and there is a receiving space for receiving the movable plate 31 in the fixed plate 32. It should be understood that the number of the fixed plate 32 and the movable plate 31 can also be set to other values, and is not limited thereto.

[0029] In particular, the connecting bracket includes four horizontal rods 34 connected to the upper end of the connecting shaft 33, and four driving rods 35 connecting the horizontal rods 34 and the movable plate 31. That is, one end of each driving rod 35 is connected to the movable plate 31, and the other end is connected to the horizontal rod 34, so that when the connecting shaft 33 rotates, the driving rod 35 is driven to rotate, and then the movable plate 31 is driven to rotate and accommodated in the accommodation space of the adjacent fixed plate 32. In this way, through the rotation of the movable plate 31, a gate is formed in the tank body 1 to control whether the upper and lower parts of the tank body 1 are connected. The third filter screen 43 is sleeved on the bottom of the connecting shaft 33, and a sealing ring 6 and a sealing bearing 7 are provided at the connection between the third filter screen 43 and the connecting shaft 33.

[0030] The closed switch valve 2 includes a valve body 21, a valve core 22 threadedly connected to the valve body 21, and a wheel 23 for driving the valve core 22 to rotate. A first buckle 221 is provided on the top of the valve core 22, and a first clamping groove 211 adapted to be clamped with the first buckle 221 is correspondingly provided on the valve body 21. A connecting shaft 33 extends to the inside of the valve body 21, and a second buckle 331 is provided on the bottom of the connecting shaft 33, and a second clamping groove 212 adapted to be clamped with the second buckle 331 is correspondingly provided on the valve body 21.

[0031] The working principle of the copper and tin separation and recovery device 100 in the waste circuit board leachate of the utility model is as follows:

[0032] In the initial state, the movable plate 31 is accommodated inside the fixed plate 32; that is, the upper and lower parts of the tank body 1 are in a connected state; during the recycling process, the waste circuit board leachate is first gradually added into the tank body 1 through the pump body, and at the same time, air is slowly blown into the air inlet pipe 12 through the blower, and the motor 53 drives the stirring rod 52 to drive the impeller 51 to slowly stir for a certain period of time, so that the metal Sn ions in the leachate are oxidized to form precipitation, and are isolated at the bottom of the tank body 1 by the first filter screen 41 and the second filter screen 42.

[0033] Recovery of metal Sn: First, rotate the wheel 23 counterclockwise, the thread on the valve core 22 interacts with the thread 212 on the valve body 21, so that the valve body 21 moves down until the second slot 212 of the valve body 21 abuts against the second buckle 331 of the connecting shaft 33, and the first slot 211 of the valve body 21 abuts against the first buckle 221 at the top of the valve core 22; at this time, the connecting shaft 33, the valve core 22, and the valve body 21 are in a linkage state, continue to rotate the wheel 23, the valve core 22 rotates, the connecting shaft 33 rotates and drives the driving rod 35 to rotate, and then drives the movable plate 31 to rotate and move out of the receiving space of the fixed plate 32 to unfold, so as to separate the interior of the tank body 1 into two upper and lower separation spaces, so as to isolate the liquid from the precipitation under the isolation plate (fixed plate 32, movable plate 31). At this time, open the discharge valve 9 to take out the Sn precipitation and realize the recovery of metal Sn.

[0034] After the material is taken, the wheel disc 23 is rotated clockwise, and correspondingly, the connecting shaft 33 rotates and drives the driving rod 35 to rotate, thereby driving the movable plate 31 to rotate into the receiving space of the fixed plate 32. At this time, the interior of the tank body 1 is connected from top to bottom.

[0035] The wheel disc 23 is continuously rotated, and the threads on the valve core 22 interact with the threads 212 on the valve body 21, so that the valve body 21 moves upward, the second slot 212 of the valve body 21 is separated from the second buckle 331 of the connecting shaft 33, and the first slot 211 of the valve body 21 is separated from the first buckle 221 at the top of the valve core 22; as the wheel disc 23 rotates, the valve body 21 moves upward until it presses against the tank body 1 to achieve sealing. Then, the oxidation precipitation of Sn in the waste circuit board leachate and the Cu-containing liquid are separated.

[0036] The liquid after Sn removal is isolated by the first filter 41 and the second filter 42, and then discharged through the drain pipe 13 in the form of overflow, and enters the Cu extraction, separation and recovery equipment to extract and recover Cu, thereby finally achieving the separation and recovery of Cu and Sn in the waste circuit board leachate.

[0037] The recycling principle is as follows:

[0038] The metal Sn in the leaching solution is Sn 2+ It exists in the form of a metal Sn. After slowly oxidizing in the air, the changes of the metal Sn are as follows:

[0039] (1) Part of the divalent tin is oxidized to tetravalent tin by the air brought in during the reaction.

[0040] 2Sn 2+ +O 2 +4H + =2Sn 4+ +2H 2 O

[0041] (2) Sn in solution 2+ Sn 4+ , hydrolysis precipitation occurs.

[0042] 2Sn 2+ +O 2 +4H 2 O=2H 2 SnO 3 ↓+4H +

[0043] Sn 4+ +3H 2 O=H 2 SnO 3 ↓+4H +

[0044] The stannic acid precipitate is obtained to achieve the separation and recovery of metal Sn in the leaching solution of waste circuit boards.

[0045] In summary, the copper and tin separation and recovery device 100 in the waste circuit board leachate provided by the utility model is configured with an isolation device and a closed switch valve in the tank body, and the closed switch valve at the bottom is controlled to control the movable plate in the tank body to be unfolded or accommodated in the fixed plate; when the movable plate is unfolded, the precipitate is separated from the liquid, and the precipitate is taken out through the discharge valve to achieve the recovery of metal Sn. The liquid after the Sn precipitation is connected to the outside through the top drainage pipe and discharged to extract and recover Cu, and finally the separation and recovery of Cu and Sn in the waste circuit board leachate is achieved. The utility model has a reasonable design, a simple principle, convenient production and operation, is easy to implement, and has a good separation effect. It can shorten the process of metal recovery in waste circuit boards and realize continuous production.

[0046] The above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model.

Claims

1. A device for separating and recovering copper and tin from waste circuit board leachate, characterized in that: The invention comprises a tank body, a stirring device, a closed switch valve arranged at the bottom of the tank body, a discharge valve, and a feed pipe, an air inlet pipe, and a liquid discharge pipe connected to the tank body; the upper part, the middle part, and the lower part of the tank body are respectively provided with a first filter screen, a second filter screen, and a third filter screen; the copper and tin separation and recovery device in the waste circuit board leachate also comprises an isolation device arranged at the lower part of the tank body, and the isolation device comprises a plurality of fixed plates, a movable plate arranged between two adjacent fixed plates, a connecting bracket connected to the movable plate, and a connecting shaft connected to the connecting bracket; the closed switch valve comprises a valve body, a valve core threadedly connected to the valve body, and a wheel for driving the valve core to rotate, and the top of the valve core is provided with a first buckle; the connecting shaft extends to the inside of the valve body, and the bottom of the connecting shaft is provided with a second buckle; the valve body is provided with a first card slot and a second card slot corresponding to the first card slot and the second card slot.

2. The device for separating and recovering copper and tin in the leaching solution of waste circuit boards according to claim 1, characterized in that: The number of the fixed plates and the number of the movable plates are both four; the fixed plates are hollow, and the fixed plates have a receiving space for receiving the movable plates.

3. The device for separating and recovering copper and tin in the leaching solution of waste circuit boards according to claim 2 is characterized in that: The connecting bracket includes four horizontal rods connected to the upper end of the connecting shaft, and a driving rod connecting the horizontal rods and the movable plate.

4. The device for separating and recovering copper and tin in the leaching solution of waste circuit boards according to claim 2 is characterized in that: The fixed plate and the movable plate are located at a level between the second filter screen and the third filter screen.

5. The device for separating and recovering copper and tin in the leaching solution of waste circuit boards according to claim 1, characterized in that: The air inlet end of the air inlet pipe is connected to the blower, and the air outlet end of the air inlet pipe is connected to a circular air diffusion pipe, and the circular air diffusion pipe is provided with a plurality of air outlets.

6. The device for separating and recovering copper and tin in the leaching solution of waste circuit boards according to claim 5, characterized in that: The circular air diffusion pipe is arranged above the fixing plate.

7. The device for separating and recovering copper and tin in the leaching solution of waste circuit boards according to claim 1, characterized in that: The feed pipe extends to the interior of the tank.

8. The device for separating and recovering copper and tin in the leaching solution of waste circuit boards according to claim 1, characterized in that: One end of the drain pipe extends to the top of the first filter screen, and the other end is connected to the copper extraction, separation and recovery device.

9. The device for separating and recovering copper and tin in the waste circuit board leachate according to claim 1, characterized in that: The stirring device comprises a motor with a driving shaft, a stirring rod driven by the driving shaft, and an impeller arranged on the stirring rod.

10. The device for separating and recovering copper and tin in the leaching solution of waste circuit boards according to claim 9, characterized in that: The first filter screen and the second filter screen are sleeved on the stirring rod, and a sealing ring and a sealing bearing are provided at the connection between the first filter screen, the second filter screen and the stirring rod.

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