Waste circuit board metal recovery device

Abstract

The invention relates to the field of metal recovery, and particularly discloses a waste circuit board metal recovery device which comprises an acid-base pool and a liquid guide table arranged on the acid-base pool, a soaking cage is placed in the acid-base pool and comprises symmetrical containing frames used for containing broken circuit boards, hinged frames hinged to each other are arranged at one ends of the containing frames, and the hinged frames are arranged on the liquid guide table. Lifting ropes are arranged at the other end of the containing frame, and a second lifting head is fixed between the lifting ropes. The soaking cage is provided with the following two stations: a first station: a hoisting machine is used for hoisting along the hinging frame, so that the two containing frames are attached to each other; and in the second station, the hoisting machine hoists along the second hoisting head, so that the two containing frames are turned over along the hinge frame. According to the device disclosed by the invention, the seepage of internal liquid from the containing frames is accelerated through the two stations of separating and closing the two containing frames, so that the waiting time is shortened, the total time of batch leaching is shortened, and the efficiency of large-batch leaching is improved.

Description

Technical Field

[0001] This invention relates to metal recycling technology, specifically a device for recycling metal from waste circuit boards. Background Technology

[0002] As is well known, waste circuit boards contain various non-ferrous metals, such as copper, tin, lead, nickel, iron, and gold. Even after the electronic components are removed from these boards, the bare boards still possess high recycling value. Waste circuit board recycling methods include mechanical and chemical processing. Hydrometallurgical processes in chemical processing utilize batch leaching with different acids to leach and deposit various precious metals from the broken circuit boards, thus obtaining the precious metals.

[0003] For example, the invention patent with application publication number CN119753342A, application publication date April 4, 2025, entitled "A Wet Processing Device for Recycling Precious Metals from Waste Circuit Boards", has a specific structure of an acid washing tank including a crushing component, a dissolving component, a buoyancy filter collection component, a bottom plate component, belt one, belt two, and pulley A. The crushing component is connected to the dissolving component. As the amount of dissolving liquid in the dissolving liquid container decreases, the liquid level of the dissolving liquid begins to drop. The float plate floats on the liquid level of the dissolving liquid and drops with it. The float plate drives the opening and closing plate connecting rod and the opening and closing plate to move, so that the opening and closing plate opens the replenishment installation box, and the dissolving liquid in the liquid tank enters the dissolving liquid container through the connecting box and the replenishment installation box, thereby realizing the automatic replenishment of the dissolving liquid container.

[0004] The shortcomings of existing technology are that in the wet leaching process of waste circuit boards, a large PP acid-alkali tank is used as the bottom of the tank to hold the solvent, and the broken circuit boards are placed in the PP acid-alkali tank in a wire mesh cage for leaching. However, during the tank changing process, the wire mesh cage needs to be lifted and the solution between the wire mesh cages can be discharged before the tank can be changed. However, the natural removal time by gravity is slow, especially when the broken circuit boards are stacked, which will intercept the residual liquid and require waiting, resulting in a long leaching time in batches. Summary of the Invention

[0005] The purpose of this invention is to provide a waste circuit board metal recycling device to overcome the above-mentioned shortcomings in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a waste circuit board metal recycling device, comprising an acid-alkali tank and a liquid guiding platform disposed on the acid-alkali tank, wherein an immersion cage is placed in the acid-alkali tank, the immersion cage comprising symmetrical holding frames for holding broken circuit boards, one end of the holding frame being provided with a hinge frame that is hinged to each other, the other end of the holding frame being provided with a lifting rope, and a second lifting head being fixed between the lifting ropes;

[0007] The soaking cage has the following two stations:

[0008] First station: The hoisting machine hoists along the hinged frame to bring the two containers together;

[0009] Second station: The hoisting machine lifts along the second hoisting head, causing the two holding frames to flip along the hinge frame.

[0010] As a further description of the above technical solution: the liquid guiding platform is an inverted trapezoid, and several waste liquid holes are opened on the liquid guiding platform; a bubble generator is provided at the bottom of the acid-base pool.

[0011] As a further description of the above technical solution: a liquid blocking platform is provided on the waste liquid hole on the inner wall of the liquid guiding platform, and a semi-circular groove corresponding to the liquid blocking platform is opened on the outer wall of the holding frame.

[0012] As a further description of the above technical solution: the inner sidewall of the holding frame is provided with three inclined surfaces, and two of the three inclined surfaces form a cavity, which is directly opposite the bubble generator.

[0013] As a further description of the above technical solution: a first lifting head is hinged between the two hinged frames, and a limiting rope is provided between the first lifting head and the second lifting head, the limiting rope limiting the opening and closing angle of the holding frame.

[0014] As a further description of the above technical solution: the inner side wall of the holding frame is rotatably connected to an inner side plate, and the inner side plate stops rotating after the holding frame rotates beyond a predetermined angle and disengages from the holding frame.

[0015] As a further description of the above technical solution: the first lifting head is provided with a rope seat for fixing the limiting rope, the limiting rope is provided with a stud, the stud passes through the second lifting head and is threadedly connected to a nut for restriction.

[0016] As a further description of the above technical solution: the two ends of the inner side plate are respectively provided with a first hinge rod and a second hinge rod with a blocking protrusion. The first hinge rod is hinged to the second hinge rod on the other inner side plate and is limited by the blocking protrusion.

[0017] As a further description of the above technical solution: the bottom of the inner side plate is provided with an arc-shaped buckle plate, the bottom of the holding frame is provided with a base plate, and the base plate is provided with a buckle groove corresponding to the arc-shaped buckle plate.

[0018] As a further description of the above technical solution: the top of the holding frame is rotatably connected to an upper cover plate.

[0019] In the above technical solution, the waste circuit board metal recycling device provided by the present invention has the following beneficial effects: During the acid leaching process, the hoisting machine is first hooked onto the hole of the hinge frame and lifted upwards. At this time, the lifting point is the hinge point of the two holding frames, keeping the two holding frames in a close fit. The two closed holding frames can be submerged in the acid-alkali tank for immersion, thereby leaching out the internal metal. After a period of leaching, the immersion cage is switched to the second station, that is, the hoisting machine is hooked onto the second hoisting head. When the second lifting head is raised, the lifting point changes from the hinge point to the two side mounting frames. The height of the side mounting frames is higher than the hinge point of the hinge frame. At this time, due to the weight of the holding frames, the two holding frames will open along the hinge point. As the second lifting head continues to pull and lift, the holding frames will eventually contact the inclined inner wall of the liquid guiding platform. At this time, the two holding frames are in a separated state. The two separated holding frames are in an inclined state, which can accelerate the seepage of the liquid inside from the holding frames, reduce the waiting time, and the seeped liquid can also flow back into the acid and alkali tank along the liquid guiding platform for reuse. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0021] Figure 1 This is a schematic diagram of the overall structure provided for an embodiment of the present invention;

[0022] Figure 2 This is an exploded view of the overall structure provided in an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the soaking cage structure provided in an embodiment of the present invention;

[0024] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0025] Figure 5 This is a schematic cross-sectional view of the overall structure provided in an embodiment of the present invention;

[0026] Figure 6 for Figure 5 Enlarged view of point B in the middle;

[0027] Figure 7 for Figure 5 Enlarged view of point C in the middle;

[0028] Figure 8 This is an exploded schematic diagram of the soaking cage structure provided in an embodiment of the present invention;

[0029] Figure 9 for Figure 8 Enlarged view of point D;

[0030] Figure 10 This is a schematic cross-sectional view of the soaking cage structure provided in an embodiment of the present invention;

[0031] Figure 11 for Figure 10 Enlarged diagram of point E in the middle.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1. Acid / alkali tank; 11. Bubble generator; 12. Drain hole; 2. Liquid guide platform; 21. Lifting trough; 22. Waste liquid hole; 221. Liquid blocking platform; 3. Soaking cage; 31. Container frame; 311. Semicircular trough; 312. Hinge frame; 32. Top cover plate; 33. Side mounting frame; 331. Lifting rope; 34. Inner side plate; 340. Three inclined planes; 341. First hinge rod; 3411. Blocking protrusion; 342. Second hinge rod; 343. Arc buckle plate; 35. Base plate; 41. First lifting head; 411. Rope seat; 421. Restriction seat; 42. Second lifting head; 61. Restriction rope; 62. Stud. Detailed Implementation

[0034] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0035] Please see Figure 1-11 This invention provides a technical solution: a waste circuit board metal recycling device, including an acid-alkali tank 1 and a liquid guiding platform 2 disposed on the acid-alkali tank 1. The liquid guiding platform 2 is fastened to the frame of the acid-alkali tank 1. The acid-alkali tank 1 has a drain hole 12 for draining the liquid that has been absorbed and saturated in the acid-alkali tank 1. A soaking cage 3 is placed in the acid-alkali tank 1. The soaking cage 3 is used as... Figure 3 and Figure 8As shown, the immersion cage 3 includes symmetrical holding frames 31. A top cover plate 32 is rotatably connected to the top of each holding frame 31. Two hinged frames 312 are symmetrically arranged at the ends of the holding frames 31 that are close to each other, forming a hinge point. Side mounting frames 33 are symmetrically arranged at the ends of the holding frames 31 that are far apart from each other. A second lifting head 42 is fixedly connected to the side mounting frames 33 by a lifting rope 331. During the acid leaching process, the lifting machine is first hooked onto the holes of the hinged frames 312 and lifted upwards. At this time, the lifting point is the hinge point of the two holding frames 31, keeping the two holding frames 31 in a close-fitting state. The two closed holding frames 31 can then be submerged in the acid-alkali tank 1 for immersion, thereby leaching out the internal metal. After a period of leaching, the immersion cage 3 is switched to the second position, that is, the lifting machine is hooked onto the second lifting head 42. At this time, the second lifting head 42 is lifted. When the lifting head 42 is installed, the lifting point changes from the hinge point to the two side mounting frames 33. The height of the side mounting frames 33 is higher than the hinge point of the hinge frame 312. At this time, due to the weight of the holding frame 31, the two holding frames 31 will open along the hinge point. As the second lifting head 42 continues to pull and lift, the holding frame 31 will eventually contact the inclined inner wall of the liquid guiding platform 2. At this time, the two holding frames 31 are in a separated state. The two separated holding frames 31 are in an inclined state, which can accelerate the seepage of the liquid inside from the holding frame 31, reduce the waiting time, and the seeped liquid can also flow back into the acid and alkali tank 1 along the liquid guiding platform 2. After the seepage is completed, the lifting machine is hooked back into the hole of the hinge frame 312 for lifting and closing the two holding frames 31. When closing, a collision will occur, which will help the liquid flow out, reduce solution residue, reduce waiting time, shorten the total time of batch leaching, and increase the efficiency of large-scale leaching.

[0036] In another embodiment provided by the present invention, such as Figure 2 As shown, the liquid guiding platform 2 is an inverted trapezoid, with symmetrically arranged lifting slots 21 for hoisting operations to allow the hook to pass through. Several through-holes 22 for waste liquid are provided on the inner wall of the inverted trapezoid. A bubble generator 11 is installed at the bottom of the acid-alkali tank 1. The bubble generator 11 is activated after the soaking cage 3 sinks into the acid-alkali tank 1. The bubble generator 11 agitates the liquid flow in the acid-alkali tank 1, causing the liquid to enter the gaps in the broken circuit boards within the holding frame 31. Furthermore, during the rising of the bubbles, it can also carry away dust particles from the circuit boards. There are three pools 1. The first acid-base pool 1 contains dilute hydrochloric acid, the second acid-base pool 1 contains hydrochloric acid + oxidant, and the third acid-base pool 1 contains aqua regia. The bubble generator 11 is only set in the first acid-base pool 1. The bubbles rise to the surface and float the dust particles to the water surface. When the two holding frames 31 are separated by the lifting of the second hoisting head 42, the liquid surface will fluctuate and the liquid will flow into the trapezoidal inner wall of the liquid guide platform 2, so that the foam and some liquid will flow out from the waste liquid hole 22. The place where the acid-base pool 1 is placed is an acid-base resistant plastic floor, which makes it easy to clean the waste liquid flowing out from the waste liquid hole 22.

[0037] Preferred, such as Figure 11 As shown, a liquid blocking platform 221 is provided on the waste liquid hole 22 on the inner wall of the liquid guiding platform 2. The liquid blocking platform 221 is semi-arc-shaped and is located on the upper half of the waste liquid hole 22. The outer wall of the holding frame 31 is provided with a semi-circular groove 311 corresponding to the liquid blocking platform 221. The semi-circular groove 311 can pass over the liquid blocking platform 221 when the holding frame 31 slides along the inclined inner wall of the liquid guiding platform 2. When the two holding frames 31 are separated and set on the inclined inner wall of the liquid guiding platform 2 by the continuous lifting of the second lifting head 42, the bottom plate 35 of the holding frame 31 is also mesh and will continue to drip liquid. At this time, the liquid flows back into the acid and alkali tank 1 along the inclined inner wall of the liquid guiding platform 2. And because of the obstruction of the liquid blocking platform 221, the liquid will be guided to the two ends of the liquid blocking platform 221, thus avoiding the waste liquid from flowing out of the waste liquid hole 22.

[0038] Preferred, such as Figure 8 and Figure 10 As shown, the inner wall of the holding frame 31 has three inclined surfaces 340, which are three concave surfaces with different inclination angles connected together. Two inclined surfaces 340 form a cavity, which is a polygonal pyramid shape. The cavity is directly opposite the bubble generator 11. When the bubble generator 11 is supplying gas, it will rise and carry liquid into the polygonal pyramid cavity. The auxiliary liquid directly reaches the holding frame 31. The starting point is the hinge point of the two holding frames 31. When the two holding frames 31 sink into the acid and alkali pool 1 while keeping them in contact, the liquid will flow into the cavity with less resistance than the stacked circuit board as it sinks, and perform the first auxiliary diffusion. The bubble generator 11 in the second and third acid and alkali pools 1 can be replaced with an impeller to supply liquid into the cavity to achieve the purpose of auxiliary diffusion.

[0039] In another embodiment provided by the present invention, such as Figure 3 and Figure 4 As shown, two hinged frames 312 are hinged to the first lifting head 41. The first lifting head 41 has a hole for lifting at its center, and the second lifting head 42 also has a hole for lifting at its center. A limiting rope 61 is provided between the first lifting head 41 and the second lifting head 42. When the lifting machine hooks onto the second lifting head 42, the lifting point is the two side frames 33. During the lifting process, due to the weight of the container 31, the two container frames 31 will gradually rotate and open along the first lifting head 41. At this time, the first lifting head 41 will move away from the second lifting head 42. When the limiting rope 61 is taut as the first lifting head 41 and the second lifting head 42 move away from each other, the container frame 31 is restricted and cannot continue to open. Thus, the opening and closing angle of the container frame 31 is restricted by the limiting rope 61.

[0040] Preferably, the first lifting head 41 is provided with a rope seat 411 for fixing the limiting rope 61, and the limiting rope 61 is provided with a stud 62. The second lifting head 42 is provided with a limiting seat 421 with a through hole, through which the limiting rope 61 passes. The stud 62 passes through the second lifting head 42, and a nut is threaded onto the stud 62. The nut cannot pass through the through hole on the second lifting head 42, so that the length of the limiting rope 61 can be adjusted by rotating the nut, thereby limiting the maximum distance that the first lifting head 41 and the second lifting head 42 can move apart, and thus limiting the opening angle of the two holding frames 31.

[0041] In another embodiment provided by the present invention, such as Figure 6 and Figure 8 As shown, an inner side plate 34 is rotatably connected to the inner wall of the holding frame 31. The two inner side plates 34 are rotatably connected to each other. The rotation hinge points of the two inner side plates 34 are the same. When the two holding frames 31 are flipped with the second station, the inner side plates 34 will also be flipped with the corresponding holding frames 31. However, the flipping angle of the inner side plates 34 has a limit value, which is a predetermined angle (the predetermined angle is 80°). When the included angle of the two holding frames 31 exceeds 80°, the two inner side plates 34 will be restricted and cannot continue to rotate with the holding frames 31, causing the continuing to flip holding frames 31 and inner side plates 34 to separate. At this time, the material can be unloaded and the broken circuit board that has been leached can be discharged.

[0042] Preferred, such as Figure 6 and Figure 8 As shown, a first hinge rod 341 and a second hinge rod 342 are respectively provided at both ends of the inner side plate 34. Both the first hinge rod 341 and the second hinge rod 342 are provided with blocking protrusions 3411. The first hinge rod 341 and the second hinge rod 342 on the two inner side plates 34 are staggered. The first hinge rod 341 is hinged to the second hinge rod 342 on the other inner side plate 34 and rotates. When the two inner side plates 34 rotate, the two blocking protrusions 3411 move as follows: Figure 6 The inner side plate 34 is moved and fits against each other at a predetermined angle to restrict its rotation.

[0043] Preferred, such as Figure 7As shown, an arc-shaped buckle plate 343 is provided at the bottom of the inner side plate 34, and a base plate 35 is provided at the bottom of the holding frame 31. The base plate 35 has a buckle groove and an arc surface corresponding to the arc-shaped buckle plate 343. Before placing the broken circuit board into the holding frame 31, the inner side plate 34 is flipped over, and the arc-shaped buckle plate 343 is inserted into the corresponding buckle groove on the base plate 35. Then, the broken circuit board is placed into the two holding frames 31 with their surfaces in contact. The circuit board presses down on the arc-shaped buckle plate 343 due to its own weight, keeping the arc-shaped buckle plate 343 in place. Locking is achieved when the circuit board that has been recycled needs to be removed after leaching. The flipping angle of the two holding frames 31 is increased. As the opening angle of the two holding frames 31 increases, the weight of the circuit board inside the holding frame 31 gradually moves onto the inner side plate 34. When the included angle of the two holding frames 31 exceeds 80°, the weight of the circuit board pushes against the inner side plate 34, and the two blocking protrusions 3411 stick together to restrict the inner side plate 34 from flipping, thereby separating the inner side plate 34 and the holding frame 31 to achieve unloading.

[0044] During leaching, the broken circuit board is first placed into the container 31. Then, the hoisting machine is hooked onto the first hoisting head 41 and lifted. At this time, the lifting point is the first hoisting head 41. The weight of the container 31 drives the two container 31 to stay in contact. At this time, the two tri-sloping surfaces 340 form a cavity. Next, the first hoisting head 41 is submerged into the first acid-base tank 1, with the cavity facing the bubble generator 11. After leaching is completed, the hoisting machine is hooked onto the second hoisting head 42. When the second hoisting head 42 is lifted, the lifting point changes to the two side mounting frames 33. At this time, due to the weight of the container 31, the two container 31 will rotate and open along the first hoisting head 41. The first hoisting head 41 will move away from the second hoisting head 42. When it is lifted onto the liquid guiding platform 2, the restraining rope 61 moves away from the first hoisting head 41 and the second hoisting head 42. By straightening and limiting the opening angle, the holding frame 31 can be placed on the liquid guide platform 2 for seepage. After seepage is completed, the hoisting machine is hooked back onto the first hoisting head 41 for subsequent leaching in the acid and alkali tank 1. After the last acid and alkali tank 1 is soaked, when it is hoisted to the unloading area, the rotating nut extends the limiting rope 61 to the maximum length of the first hoisting head 41 and the second hoisting head 42. The hoisting machine is hooked onto the second hoisting head 42 and continuously hoisted. As the opening angle (angle) of the two holding frames 31 increases, the weight of the circuit board inside the holding frame 31 gradually moves onto the inner side plate 34. When the angle between the two holding frames 31 exceeds 80°, the weight of the circuit board pushes against the inner side plate 34, and the two blocking protrusions 3411 stick together to prevent the inner side plate 34 from flipping, thereby separating the inner side plate 34 and the holding frame 31 to achieve unloading.

[0045] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A waste circuit board metal recycling device, characterized in that, Includes an acid-base tank (1) and a liquid guide platform (2) set on the acid-base tank (1). The acid-base tank (1) contains a soaking cage (3). The soaking cage (3) includes symmetrical holding frames (31) for holding broken circuit boards. One end of the holding frame (31) is provided with a hinged frame (312) that is hinged to each other. The other end of the holding frame (31) is provided with a lifting rope (331). A second lifting head (42) is fixed between the lifting ropes (331). The soaking cage (3) has the following two workstations: First station: The hoisting machine hoists along the hinge frame (312) to bring the two holding frames (31) together; Second station: The hoist lifts along the second hoisting head (42) to make the two holding frames (31) flip along the hinge frame (312).

2. The waste circuit board metal recycling device according to claim 1, characterized in that, The liquid guiding platform (2) is an inverted trapezoid, and several waste liquid holes (22) are provided on the liquid guiding platform (2). A bubble generator (11) is provided at the bottom of the acid-base pool (1).

3. The waste circuit board metal recycling device according to claim 2, characterized in that, A liquid blocking platform (221) is provided on the waste liquid hole (22) on the inner wall of the liquid guiding platform (2), and a semi-circular groove (311) corresponding to the liquid blocking platform (221) is opened on the outer wall of the holding frame (31).

4. The waste circuit board metal recycling device according to claim 2, characterized in that, The inner wall of the holding frame (31) is provided with three inclined surfaces (340), and two of the three inclined surfaces (340) form a cavity, which is directly opposite the bubble generator (11).

5. The waste circuit board metal recycling device according to claim 1, characterized in that, A first lifting head (41) is hinged between the two hinged frames (312), and a limiting rope (61) is provided between the first lifting head (41) and the second lifting head (42), the limiting rope (61) limiting the opening and closing angle of the holding frame (31).

6. The waste circuit board metal recycling device according to claim 1, characterized in that, The inner wall of the holding frame (31) is rotatably connected to an inner side plate (34). The inner side plate (34) stops rotating after the holding frame (31) rotates beyond a predetermined angle and disengages from the holding frame (31).

7. The waste circuit board metal recycling device according to claim 5, characterized in that, The first lifting head (41) is provided with a rope seat (411) for fixing the limiting rope (61), and the limiting rope (61) is provided with a stud (62). The stud (62) passes through the second lifting head (42) and is threadedly connected to a nut for restriction.

8. A waste circuit board metal recycling device according to claim 6, characterized in that, The inner side plate (34) is provided with a first hinge rod (341) and a second hinge rod (342) with a blocking protrusion (3411) at both ends. The first hinge rod (341) is hinged to the second hinge rod (342) on the other inner side plate (34) and is limited by the blocking protrusion (3411).

9. A waste circuit board metal recycling device according to claim 6, characterized in that, The bottom of the inner side panel (34) is provided with an arc-shaped buckle plate (343), and the bottom of the holding frame (31) is provided with a base plate (35), and the base plate (35) is provided with a buckle groove corresponding to the arc-shaped buckle plate (343).

10. A waste circuit board metal recycling device according to claim 1, characterized in that, The top of the holding frame (31) is rotatably connected to a top cover plate (32).

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