A wet copper removal device and method for recycling ternary battery black powder

Abstract

The present invention discloses a wet copper removal device and method for ternary battery black powder, relating to the technical field of black powder recovery. It includes a treatment tank, and a partition is installed in the middle of the inner wall of the treatment tank, and the inner space of the treatment tank is divided into two treatment chambers by the partition. Through the arranged stirring mechanism, detection mechanism, liquid adding mechanism, liquid separation mechanism and separation mechanism, the present invention can automatically carry out stirring and the next operation, add materials, react and solid-liquid separation operations, with high automation performance, which can improve the efficiency of black powder recovery. Through the setting of the reaction mechanism, the reaction interval time can be customized or the liquid can be detected for the presence of copper after the reaction time arrives, and whether to continue stirring and mixing is determined according to the detection result to improve the efficiency of copper removal and the efficiency of black powder recovery, which is beneficial to use. Through the arranged cleaning mechanism, the components providing the reaction space can be self-cleaned to avoid result deviation and is beneficial to use.

Description

Technical Field

[0001] The present invention relates to the technical field of black powder recovery, and specifically to a wet recovery and copper removal device and method for black powder of ternary batteries. Background Art

[0002] Ternary batteries, usually referring to lithium nickel cobalt manganese oxide batteries, are a type of lithium-ion battery that is widely used at present. They are commonly used in electric vehicles, portable electronic devices, energy storage systems, etc. In a recycling center that integrates the treatment of various electronic wastes, the center is mainly responsible for recycling waste batteries, especially ternary lithium batteries. The center uses wet recovery technology to treat black powder, including separating and recovering copper in the black powder. When the recycling center recovers black powder and copper, it focuses on the recovery efficiency.

[0003] A continuous waste lithium battery black powder recovery and treatment device and method with the patent publication number CN116646632A evacuates the microwave pyrolysis reaction chamber and the microwave reduction roasting chamber to a negative pressure, and then fills them with inert gas; preheats the microwave pyrolysis reaction chamber and the microwave reduction roasting chamber; adds black powder to the preheated microwave pyrolysis reaction chamber and performs microwave pyrolysis during the process of spreading and conveying on a plate chain conveyor; the pyrolyzed material is conveyed into the microwave reduction roasting chamber, hydrogen is introduced into it, and microwave roasting reduction is carried out while stirring and conveying by a screw conveyor; the material after microwave roasting reduction enters the cooling chamber, falls on the plate chain conveyor, hydrogen is introduced into it to cool the material, and at the same time hydrogen is preheated. The cooled material is discharged, and the preheated hydrogen is conveyed to the microwave reduction roasting chamber. It has the advantages of low energy consumption, high efficiency, short cycle, and cost savings.

[0004] In the recovery process of the above-mentioned wet recovery equipment for black powder of ternary batteries and similar principles, the overall steps are relatively cumbersome and the automation is poor. It is not suitable for automatically recovering black powder in ternary batteries to improve the black powder recovery efficiency. Moreover, in the process of removing copper from black powder, due to the different copper contents in different batches of solutions, the required reaction time in the copper removal process is also different. If the solution is not automatically detected, there will be problems such as a long reaction time resulting in low black powder recovery efficiency and a short reaction time resulting in low purity of subsequent products. Therefore, the present invention is proposed. Summary of the Invention

[0005] The purpose of the present invention is to provide a wet recovery and copper removal device and method for black powder of ternary batteries to solve the problems raised in the above background art.

[0006] To achieve the above object, the present invention provides the following technical solution: A wet recovery and copper removal device for ternary battery black powder, including a treatment tank. A partition is installed in the middle of the inner wall of the treatment tank, and the internal space of the treatment tank is divided into two treatment chambers by the partition. A top plate is installed on the top of the treatment tank, and a liquid adding mechanism for injecting treatment liquid into the two treatment chambers is installed on the top plate. A feeding mechanism for feeding materials is installed on the top of the treatment tank. A stirring mechanism for mixing the liquid in the treatment chamber is installed on the outer wall of the top of the top plate. A reaction mechanism for detecting whether the solution in the treatment chamber at the bottom of the treatment tank contains copper is installed on the outer wall of the bottom of the treatment tank. A detection mechanism for monitoring the stirring effect is installed on the stirring mechanism;

[0007] The reaction mechanism includes a liquid extraction pipe installed on the outer wall of the bottom of the treatment tank. A liquid valve and a first pump are installed on the liquid extraction pipe. The liquid extraction pipe is L-shaped. A reaction base is installed on the top outer wall of the liquid extraction pipe. A round block is installed on the outer wall of the treatment tank, and a reaction cover is installed on the round block. A second storage tank is installed on the top outer wall of the reaction cover. A second flowmeter valve is installed at the discharge pipe orifice of the second storage tank. An arc-shaped plate is installed at the top pipe orifice of the liquid extraction pipe, and a gap is left between the arc-shaped plate and the top pipe orifice of the liquid extraction pipe for liquid discharge. A limiting ring is installed on the round block, and a reaction ring is placed in the limiting ring. Several insertion blocks are fixedly connected to the bottom inner wall of the reaction ring. Slots corresponding to the insertion blocks are opened on the bottom outer wall of the reaction base, and the insertion blocks are inserted into the slots to complete the splicing of the reaction ring and the reaction base. A reaction space is formed by the reaction ring, the reaction cover and the reaction base. The solution in the treatment chamber at the bottom of the treatment tank is extracted into the reaction space through the liquid valve on the liquid extraction pipe in cooperation with the first pump. Materials are put into the reaction space through the second storage tank to contact and react with the solution to judge whether the solution contains copper. A cleaning mechanism for cleaning the reaction ring and the reaction base is installed on the liquid extraction pipe.

[0008] Furthermore, the cleaning mechanism includes a water inlet pipe installed on the liquid suction pipe. A water valve is installed on the water inlet pipe. The water inlet pipe is located between the liquid valve and the first pump. A horizontal plate is installed on the outer wall of the liquid suction pipe. A second gear driven by a cleaning motor is installed on the top of the horizontal plate. A number of corresponding annular grooves and inner grooves are formed on the outer and inner walls of the liquid suction pipe. A second toothed ring is installed in one of the annular grooves. A magnet is embedded in the inner wall of the second toothed ring. The second gear meshes with the second toothed ring. Magnetic rings are installed in the remaining annular grooves. Iron rings are installed in the inner grooves. The iron rings and the magnetic rings adsorb each other. A transmission rod is fixedly connected inside the liquid suction pipe at the inner wall of the iron ring. A gap is left between the transmission rod and the inside of the liquid suction pipe for liquid circulation. A vertical plate is connected to the outer wall of the magnetic ring through a fixing rod. A detachable cleaning plate is installed on the vertical plate. A lifting assembly for adjusting the height of the reaction ring is installed on the limiting ring. By adjusting the height of the reaction ring to fit the cleaning plate through the lifting assembly, the reaction ring and the reaction base can be cleaned. An arc-shaped ring is installed on the outer wall of the liquid suction pipe at the top of the second toothed ring. A number of nozzles facing the cleaning plate are installed on the outer wall of the liquid suction pipe.

[0009] Furthermore, the stirring mechanism includes a first toothed ring installed on the outer wall of the top of the top plate and a first gear driven by a stirring motor. The first toothed ring and the first gear mesh with each other. An annular block is fixedly connected to the inner wall of the first toothed ring. A number of spring telescopic rods are embedded in the bottom outer wall of the annular block. One end of the piston rod of the spring telescopic rod is installed with an arc-shaped sealing block. A number of vertical columns penetrating the arc-shaped sealing block are installed on the bottom outer wall of the annular block. A connecting plate is installed on the bottom outer wall of the vertical column. A vertical rod is installed between the bottom outer wall of the connecting plate and the top outer wall of the partition plate. A number of stirring rods are installed on the outer wall of the vertical rod. The bottom of the vertical rod is of a hollow structure. A sleeve is fixedly connected to the inner wall of the vertical rod. An expansion head is installed on the bottom outer wall of the sleeve. Horizontal plates are installed on the outer walls of the sleeve and the vertical rod. Scrapers that fit the inner wall of the treatment tank are installed on the outer walls of the horizontal plates. Convex columns and pH meters are installed on the scrapers. A number of inclined inclined rods are installed at the bottom of the horizontal plate on the sleeve. A number of branch rods are installed on the outer wall of the inclined rod. A liquid separation mechanism for discharging the liquid in the treatment chamber at the top of the treatment tank to the treatment chamber at the bottom of the treatment tank is installed on the vertical rod. A separation mechanism for separating solids and liquids is installed at the bottom of the inner wall of the treatment tank.

[0010] Furthermore, the liquid separation mechanism includes a liquid collecting pipe installed in the inner wall of the bottom of the vertical rod. A second pump is installed at the bottom of the liquid collecting pipe. A number of liquid suction pipes are installed on the liquid collecting pipe. The liquid inlet of the liquid suction pipe is located in the treatment chamber at the top of the treatment tank. Filters are installed at the liquid inlets of the liquid suction pipes.

[0011] Furthermore, the separation mechanism includes two circular plates installed at the bottom of the inner wall of the treatment tank. One of the circular plates is rotatably connected to the other. Sector-shaped filter plates are installed on the outer walls of the tops of the circular plates. Electromagnetic blocks are installed on the outer walls of the tops of the circular plates. Iron blocks are wrapped around the outer walls of the electromagnetic blocks. The iron blocks are fixedly connected to the inclined rods.

[0012] Furthermore, the liquid adding mechanism includes mounting blocks embedded in the top plate. A number of first storage tanks are embedded in the mounting blocks. Removable tank lids are installed on the tops of the first storage tanks. Filter meshes are embedded in the tank lids. Connecting pipes are installed at the bottoms of the first storage tanks. The connecting pipes are respectively fixedly connected to the outer wall of the top and the outer wall of the bottom of the treatment tank. The first storage tanks add liquid to the treatment chamber through the connecting pipes. First flowmeter valves are installed on the connecting pipes. An annular pipe is installed on the outer wall of the treatment tank. An inflation pipe connected to the connecting pipe is installed on the annular pipe. An air valve is installed on the inflation pipe. A blower is installed at the orifice of the annular pipe.

[0013] Furthermore, the detection mechanism includes a pressure sensor embedded in the stirring rod. A rubber sleeve is sleeved on the pressure sensor. A spring is installed between the pressure sensor and the rubber sleeve. The pressure received by the pressure sensor is changed by the liquid compressing the rubber sleeve and the spring.

[0014] Furthermore, the blanking mechanism includes a blanking funnel installed on the top plate. The blanking funnel is inserted into the annular block. A bearing plate is installed on the inner wall of the annular block. Crushing blocks are installed on the bearing plate. The crushing blocks are located in the blanking funnel. A heating plate is embedded in the bottom of the inner wall of the treatment tank. A treatment window communicating with the treatment chamber is installed on the outer wall of the treatment tank. Support legs are installed on the bottom outer wall of the treatment tank. A bottom plate is installed on the bottom outer wall of the support legs. A drain pipe is installed on the bottom outer wall of the reaction ring.

[0015] A method for wet recovery and copper removal of ternary battery black powder uses the above-mentioned equipment for wet recovery and copper removal of ternary battery black powder. The method includes:

[0016] Step 1: Pulp preparation. The raw ternary black powder is put into the treatment chamber at the top of the treatment tank through the blanking mechanism. Water is added through the liquid adding mechanism and mixed with the black powder by the stirring mechanism to fully mix and prepare a uniform slurry.

[0017] Step 2: Medium leaching. Strong acid is added to the slurry through the liquid adding mechanism and stirred and reacted by the stirring mechanism to obtain medium leaching residues and medium leaching mother liquor. The medium leaching mother liquor and the medium leaching residues are separated by the liquid separation mechanism. The medium leaching residues stay in the treatment chamber at the top of the treatment tank, and the medium leaching mother liquor is transported to the treatment chamber at the bottom of the treatment tank.

[0018] Step 3: Leaching. Add strong acid and reducing agent to the intermediate leaching residue through the liquid adding mechanism for acid leaching treatment. After the acid leaching treatment, carbon residue and acid leaching mother liquor are obtained. The acid leaching mother liquor can be recycled and used as the acid added in the intermediate leaching step.

[0019] Step 4: Copper removal. Adjust the pH of the intermediate leaching mother liquor to 3 - 5 through the liquid adding mechanism, heat it to a temperature above 50 °C in the treatment chamber through the heating plate, then add sodium thiosulfate. After fully reacting for 30 min - 90 min, perform solid-liquid separation through the separation mechanism to obtain copper-removed mother liquor and copper slag. During the reaction process, extract samples through the reaction mechanism to judge whether copper is contained in the samples to determine whether to continue the reaction.

[0020] Step 5: Slag washing. Mix the obtained copper slag with water in a certain proportion, stir well for 30 min - 90 min, and then filter to obtain copper slag and washing water, where the mass ratio of copper slag to water is 0.1∶1.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] For this ternary battery black powder wet recycling copper removal equipment and its method, through the set stirring mechanism, detection mechanism, liquid adding mechanism, liquid separation mechanism and separation mechanism, it can automatically perform stirring and the next operation, add materials, react and perform solid-liquid separation operations, with high automation performance, which can improve the efficiency of black powder recycling. Through the setting of the reaction mechanism, the reaction interval time can be customized or whether copper is contained in the liquid can be detected after the reaction time arrives, and whether to continue stirring and mixing is determined according to the detection result to improve the efficiency of copper removal and the efficiency of black powder recycling, which is conducive to use. Through the setting of the cleaning mechanism, the components providing the reaction space can be self-cleaned to avoid result deviation and is conducive to use.

[0023] Meanwhile, when the black powder and water are mixed to form a slurry, stirring is required. Stir through the stirring rod. During the stirring process, through the cooperation of the pressure sensor, spring and rubber sleeve, the pressure change during stirring can be monitored, and whether the black powder and water are fully mixed to form a slurry is judged according to the pressure change. Through the setting of the spring telescopic rod and the arc-shaped sealing block, the arc-shaped sealing block is made to move downward under the action of gravity, which is convenient for feeding. When not affected by gravity, it will fit with the inner wall of the annular block to play a sealing role. At the same time, due to its arc design, the feeding area of the black powder can also be increased, which is conducive to accelerating the reaction efficiency of the black powder. Through the setting of the arc-shaped plate, the phenomenon that the material blocks the liquid extraction pipe during the feeding process of the second storage tank can be avoided, and the liquid outlet height at the liquid outlet end of the liquid extraction pipe can be restricted to avoid high liquid spraying during liquid outlet.

[0024] Meanwhile, by means of the provided fan, charging pipe, air valve and annular pipe, air can be filled into the connecting pipe, so that when discharging materials, it has an impact force, playing a role in preventing blockage and improving the mixing efficiency. By means of the provided air valve, any one or more connecting pipes can be filled with air according to the usage situation. When the black powder enters the feeding funnel, the large-particle black powder will get stuck in the gap between the crushing block and the feeding funnel. By starting the stirring mechanism to drive the crushing block to rotate, the black powder can be extruded and crushed to increase the reaction area of the black powder and improve the reaction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 is a schematic diagram of the top structure of the top plate of the present invention;

[0027] Figure 3 is a schematic diagram of the sectional structure of the treatment tank of the present invention;

[0028] Figure 4 is a schematic diagram of the internal structure of the treatment tank of the present invention;

[0029] Figure 5 is a schematic diagram of the liquid adding mechanism structure of the present invention;

[0030] Figure 6 is a schematic diagram of the reaction mechanism structure of the present invention;

[0031] Figure 7 is a schematic diagram of the bottom structure of the reaction ring of the present invention;

[0032] Figure 8 is a schematic diagram of the structure of a part of the cleaning mechanism of the present invention;

[0033] Figure 9 is a schematic diagram of the enlarged structure at A of the present invention;

[0034] Figure 10 is a schematic diagram of the detection mechanism structure of the present invention;

[0035] Figure 11 is a schematic diagram of the separation mechanism structure of the present invention;

[0036] Figure 12 is a schematic diagram of the method flow structure of the present invention.

[0037] In the figure: 1, processing tank; 2, processing window; 3, liquid adding mechanism; 301, mounting block; 302, first storage tank; 303, tank cover; 304, filter screen; 305, first flowmeter valve; 306, charging pipe; 307, connecting pipe; 308, air valve; 309, annular pipe; 310, fan; 4, blanking mechanism; 401, blanking funnel; 402, crushing block; 5, stirring mechanism; 501, first toothed ring; 502, first gear; 503, annular block; 504, arc-shaped sealing block; 505, connecting plate; 506, vertical rod; 507, stirring rod; 508, spring telescopic rod; 509, vertical column; 510, scraper; 511, convex column; 512, inclined rod; 513, branch rod; 514, sleeve; 6, top plate; 7, bottom plate; 8, reaction mechanism; 801, liquid suction pipe; 802, liquid valve; 803, first pump; 804, liquid discharge pipe; 805, limit ring; 806, reaction ring; 807, reaction cover; 808, second flowmeter valve; 809, second storage tank; 810, arc-shaped plate; 811, round block; 812, reaction base; 813, slot; 814, insert block; 9, cleaning mechanism; 901, water inlet pipe; 902, water valve; 903, arc-shaped ring; 904, lifting assembly; 905, vertical plate; 906, cleaning plate; 907, second toothed ring; 908, iron ring; 909, transmission rod; 910, magnetic ring; 911, spray head; 912, second gear; 10, partition board; 11, heating plate; 12, liquid distribution mechanism; 1201, liquid collecting pipe; 1202, liquid suction pipe; 1203, second pump; 13, detection mechanism; 1301, pressure sensor; 1302, spring; 1303, rubber sleeve; 14, separation mechanism; 1401, round plate; 1402, filter plate; 1403, electromagnetic block; 1404, iron block. Detailed implementation manner

[0038] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0039] The ternary battery black powder not only contains valuable metals such as nickel, cobalt, and lithium, but also contains copper. The presence of copper will affect the purity of the final recycled product and reduce its market value. Therefore, the copper removal operation can improve the purity of the final product, make it meet the reuse standard, and increase the added value.

[0040] Such as Figures 1-11As shown in the figure, the present invention provides a technical solution: a wet copper removal device for ternary battery black powder, a treatment tank 1, a partition 10 is installed in the middle of the inner wall of the treatment tank 1, and the internal space of the treatment tank 1 is divided into two treatment chambers by the partition 10. A top plate 6 is installed on the top of the treatment tank 1, and a liquid adding mechanism 3 for injecting treatment liquid into the two treatment chambers is installed on the top plate 6. A feeding mechanism 4 for feeding materials is installed on the top of the treatment tank 1. A stirring mechanism 5 for mixing the liquid in the treatment chamber is installed on the outer wall of the top of the top plate 6. A reaction mechanism 8 for detecting whether the solution in the treatment chamber at the bottom of the treatment tank 1 contains copper is installed on the outer wall of the bottom of the treatment tank 1. A detection mechanism 13 for monitoring the stirring effect is installed on the stirring mechanism 5;

[0041] It should be noted that the internal space of the treatment tank 1 is divided into two treatment chambers by the installed partition 10, and operations can be carried out separately in the two treatment chambers, which is beneficial to improving the recovery efficiency. Through the installed liquid adding mechanism 3, the required liquid can be automatically injected into the required treatment chamber to reduce the errors and insecurity existing in manual liquid addition. Through the installed feeding mechanism 4, the staff can put the black powder into the treatment tank 1. Through the installed stirring mechanism 5, the liquid and solid in the treatment chamber can be fully mixed to improve the black powder recovery efficiency. Through the installed reaction mechanism 8, it can be detected whether the finally treated solution contains copper to ensure the efficiency of copper removal and the efficiency of black powder recovery. In the specific process of black powder recovery, first enter the treatment chamber at the top of the treatment tank 1 through the feeding mechanism 4, add water and mix it into a slurry, add acid for medium leaching treatment and carry out solid-liquid separation after mixing into a slurry, so that the solid remains in the treatment chamber at the top of the treatment tank 1 and the liquid enters the treatment chamber at the bottom of the treatment tank 1. Improve the liquid pH environment to 3-5, adjust the liquid temperature environment, and then add sodium thiosulfate for full reaction to obtain copper removal mother liquor and copper slag. The copper removal mother liquor is the product obtained after copper removal, which is convenient for subsequent further recovery and use.

[0042] The reaction mechanism 8 includes a liquid suction pipe 801 installed on the outer wall of the bottom of the treatment tank 1. A liquid valve 802 and a first pump 803 are installed on the liquid suction pipe 801. The liquid suction pipe 801 is L-shaped. A reaction base 812 is installed on the top outer wall of the liquid suction pipe 801. A round block 811 is installed on the outer wall of the treatment tank 1. A reaction cover 807 is installed on the round block 811. A second storage tank 809 is installed on the top outer wall of the reaction cover 807. A second flowmeter valve 808 is installed at the outlet pipe of the second storage tank 809. An arc-shaped plate 810 is installed at the top pipe orifice of the liquid suction pipe 801. A gap is left between the arc-shaped plate 810 and the top pipe orifice of the liquid suction pipe 801 for liquid discharge. A limiting ring 805 is installed on the round block 811. A reaction ring 806 is placed in the limiting ring 805. A plurality of insertion blocks 814 are fixedly connected to the bottom inner wall of the reaction ring 806. A slot 813 corresponding to the insertion blocks 814 is opened on the bottom outer wall of the reaction base 812. The insertion blocks 814 are inserted into the slots 813 to complete the splicing of the reaction ring 806 and the reaction base 812. A reaction space is formed by the reaction ring 806, the reaction cover 807 and the reaction base 812. The solution in the treatment chamber at the bottom of the treatment tank 1 is pumped into the reaction space through the liquid valve 802 on the liquid suction pipe 801 in cooperation with the first pump 803. Materials are put into the reaction space through the second storage tank 809 to contact with the solution and react to judge whether copper is contained in the solution. A cleaning mechanism 9 for cleaning the reaction ring 806 and the reaction base 812 is installed on the liquid suction pipe 801.

[0043] It should be noted that by setting the arc-shaped plate 810, the phenomenon that the material blocks the liquid suction pipe 801 during the feeding process of the second storage tank 809 can be avoided, and at the same time, the liquid discharge height at one end of the liquid outlet of the liquid suction pipe 801 is limited. During the copper removal reaction process, the liquid in the reaction process is pumped into the reaction space through the liquid suction pipe 801 by the first pump 803 and the liquid valve 802. The second storage tank 809 can store materials such as sodium hydroxide that can react significantly with copper ions. Sodium hydroxide is put into the reaction space through the second storage tank 809 to react with the liquid. The content of the liquid and the content of sodium hydroxide are set by the staff themselves. By setting the second flowmeter valve 808, the amount of sodium hydroxide put in can be monitored. By judging the amount of the generated product sodium hydroxide or whether the generated product contains sodium hydroxide, it can be judged whether the copper content in the liquid meets the standard. Copper hydroxide is blue, which is convenient for directly observing the reaction result and is beneficial to use. Moreover, copper hydroxide can be directly recycled. Through the setting of the reaction mechanism 8, the reaction interval time can be customized or whether copper is contained in the liquid can be detected after the reaction time arrives. According to the detection result, it is determined whether to continue stirring and mixing to improve the efficiency of copper removal and the efficiency of black powder recovery, which is beneficial to use. Through the setting of the cleaning mechanism 9, the components providing the reaction space can be self-cleaned, avoiding the generation of result deviation, which is beneficial to use.

[0044] As shown Figures 6-9 in the figure, the cleaning mechanism 9 includes a water inlet pipe 901 installed on the liquid extraction pipe 801. A water valve 902 is installed on the water inlet pipe 901. The water inlet pipe 901 is located between the liquid valve 802 and the first pump 803. A horizontal plate is installed on the outer wall of the liquid extraction pipe 801. A second gear 912 driven by a cleaning motor is installed on the top of the horizontal plate. A number of corresponding annular grooves and inner grooves are formed on the outer wall and inner wall of the liquid extraction pipe 801. A second tooth ring 907 is installed in one of the annular grooves. A magnet is embedded in the inner wall of the second tooth ring 907. The second gear 912 meshes with the second tooth ring 907. Magnetic rings 910 are installed in the remaining annular grooves. Iron rings 908 are installed in the inner grooves. The iron rings 908 and the magnetic rings 910 attract each other. A transmission rod 909 is fixedly connected to the inner wall of the iron ring 908 inside the liquid extraction pipe 801. A gap is left between the transmission rod 909 and the inside of the liquid extraction pipe 801 for liquid circulation. A vertical plate 905 is connected to the outer wall of the magnetic ring 910 through a fixing rod. A detachable cleaning plate 906 is installed on the vertical plate 905. A lifting assembly 904 for adjusting the height of the reaction ring 806 is installed on the limiting ring 805. By adjusting the height of the reaction ring 806 through the lifting assembly 904 to fit with the cleaning plate 906, the reaction ring 806 and the reaction base 812 can be cleaned. An arc ring 903 is installed on the outer wall of the liquid extraction pipe 801 at the top of the second tooth ring 907. A number of spray heads 911 facing the cleaning plate 906 are installed on the outer wall of the liquid extraction pipe 801.

[0045] It should be noted that when the cleaning mechanism 9 needs to be used, connect the water inlet pipe 901 to an external water source, open the water valve 902 and close the liquid valve 802. Clean the inner wall of the liquid extraction pipe 801 through water supply. At the same time, water will flow out from the gap between the arc plate 810 and the liquid extraction pipe 801 to wash the outer wall of the liquid extraction pipe 801 and the top of the reaction base 812. Adjust the height of the reaction ring 806 through the lifting assembly 904 until the inner wall of the reaction ring 806 fits with the cleaning plate 906. By starting the cleaning motor, drive the second gear 912 to rotate, and then drive the second tooth ring 907 to rotate. Drive the iron ring 908 corresponding to the second tooth ring 907 to rotate through the rotation of the second tooth ring 907, and then drive the transmission rod 909 to rotate. Drive the other iron rings 908 and magnetic rings 910 to rotate through the rotation of the transmission rod 909, and then drive the vertical plate 905 and the cleaning plate 906 to rotate. Then spray water through the spray heads 911 to complete the flushing of the inner wall of the reaction ring 806, and then complete the self-cleaning of the reaction space. Before cleaning, the solid generated by the reaction needs to be taken out.

[0046] As Figures 2-4As shown in the figure, the stirring mechanism 5 includes a first toothed ring 501 installed on the outer wall of the top of the top plate 6 and a first gear 502 driven by a stirring motor. The first toothed ring 501 and the first gear 502 mesh with each other. An annular block 503 is fixedly connected to the inner wall of the first toothed ring 501. A number of spring telescopic rods 508 are embedded in the bottom outer wall of the annular block 503. One end of the piston rod of the spring telescopic rod 508 is installed with an arc-shaped sealing block 504. A number of vertical columns 509 passing through the arc-shaped sealing block 504 are installed on the bottom outer wall of the annular block 503. A connecting plate 505 is installed on the bottom outer wall of the vertical column 509. A vertical rod 506 is installed between the bottom outer wall of the connecting plate 505 and the top outer wall of the partition plate 10. A number of stirring rods 507 are installed on the outer wall of the vertical rod 506. The bottom of the vertical rod 506 is a hollow structure. A sleeve 514 is fixedly connected to the inner wall of the vertical rod 506. An expansion head is installed on the bottom outer wall of the sleeve 514. A horizontal plate is installed on the outer walls of the sleeve 514 and the vertical rod 506. Scrapers 510 that fit the inner wall of the treatment tank 1 are installed on the outer walls of the horizontal plates. Convex columns 511 and pH meters are installed on the scrapers 510. A number of inclined inclined rods 512 are installed at the bottom of the horizontal plate on the sleeve 514. A number of branch rods 513 are installed on the outer walls of the inclined rods 512. A liquid separation mechanism 12 for discharging the liquid in the treatment chamber at the top of the treatment tank 1 to the treatment chamber at the bottom of the treatment tank 1 is installed on the vertical rod 506. A separation mechanism 14 for separating solids and liquids is installed on the inner wall bottom of the treatment tank 1.

[0047] It should be noted that when the stirring mechanism 5 needs to be used, the start of the stirring motor drives the first gear 502 to rotate, which in turn drives the first toothed ring 501 and the annular block 503 on the inner wall of the first toothed ring 501 to rotate. The vertical column 509 on the annular block 503 drives the connecting plate 505, the vertical rod 506 on the connecting plate 505, and the stirring rod 507 on the vertical rod 506 to rotate. Through the rotation of the stirring rod 507, the liquid in the treatment chamber at the top of the treatment tank 1 can be stirred. The rotation of the vertical rod 506 drives the sleeve 514, which in turn drives the inclined rod 512 to rotate, stirring the liquid in the treatment chamber at the bottom of the treatment tank 1. Through the branch rod 513 on the inclined rod 512, the stirring area can be increased, which is beneficial for use. Through the provided scraper 510, the attachments adhering to the inner wall of the treatment tank 1 can be removed, playing a cleaning role. Through the provided pH meter, the pH of the liquid can be monitored, facilitating the adjustment of the pH environment of the liquid. Through the spring telescopic rod 508 cooperating with the arc-shaped sealing block 504, the arc-shaped sealing block 504 has the phenomenon of moving downward under the action of gravity and will fit with the inner wall of the annular block 503 when not affected by gravity, playing a sealing role. At the same time, due to its arc-shaped design, the area for black powder feeding can also be increased, which is beneficial for accelerating the reaction efficiency of black powder. Through the provided vertical column 509, the lifting of the arc-shaped sealing block 504 is positioned. The provided liquid separation mechanism 12 and separation mechanism 14 are used to provide the effect of solid-liquid separation.

[0048] As Figure 4 shown, the liquid separation mechanism 12 includes a liquid collecting pipe 1201 installed in the inner wall of the bottom of the vertical rod 506. A second pump 1203 is installed at the bottom of the liquid collecting pipe 1201. A number of liquid suction pipes 1202 are installed on the liquid collecting pipe 1201. The liquid inlet of the liquid suction pipe 1202 is located in the treatment chamber at the top of the treatment tank 1, and filters are installed at the liquid inlets of the liquid suction pipes 1202.

[0049] It should be noted that when the liquid separation mechanism 12 needs to be used, the start of the second pump 1203 provides suction force, and the liquid in the treatment chamber at the top of the treatment tank 1 is sucked into the liquid collecting pipe 1201 by the liquid suction pipe 1202 and discharged into the treatment chamber at the bottom of the treatment tank 1 through the sleeve 514. Through the provided filter, the situation of blockage can be avoided.

[0050] As Figure 11 shown, the separation mechanism 14 includes two circular plates 1401 installed on the inner wall bottom of the treatment tank 1. One of the circular plates 1401 is rotatably connected to the other circular plate 1401. Sector-shaped filter plates 1402 are installed on the outer walls of the tops of the circular plates 1401. Electromagnetic blocks 1403 are installed on the outer walls of the tops of the circular plates 1401. Iron blocks 1404 are wrapped on the outer walls of the electromagnetic blocks 1403, and the iron blocks 1404 are fixedly connected to the inclined rod 512.

[0051] It should be noted that when the separation mechanism 14 is needed, the electromagnetic block 1403 is energized to make the electromagnetic block 1403 adsorb the iron block 1404. Then, when the iron block 1404 rotates, it drives the electromagnetic block 1403 and one of the circular plates 1401 to rotate. When the filter plates 1402 on the two circular plates 1401 coincide, solid-liquid separation can be carried out.

[0052] As Figure 5 As shown in the figure, the liquid adding mechanism 3 includes a mounting block 301 embedded and installed on the top plate 6. A number of first storage tanks 302 are embedded and installed on the mounting block 301. A detachable tank cover 303 is installed on the top of the first storage tank 302. A filter net 304 is embedded and installed on the tank cover 303. A connecting pipe 307 is installed at the bottom of the first storage tank 302. The connecting pipe 307 is respectively fixedly connected to the outer wall of the top and the outer wall of the bottom of the treatment tank 1. The first storage tank 302 adds liquid to the treatment chamber through the connecting pipe 307. A first flowmeter valve 305 is installed on the connecting pipe 307. An annular pipe 309 is installed on the outer wall of the treatment tank 1. An air charging pipe 306 connected to the connecting pipe 307 is installed on the annular pipe 309. An air valve 308 is installed on the air charging pipe 306. A blower 310 is installed at the pipe orifice of the annular pipe 309.

[0053] It should be noted that when the liquid adding mechanism 3 is needed, the first storage tank 302 is used to store the materials to be put in. Through the filter net 304 on the tank cover 303, it plays a role in ventilation and is beneficial to the preservation of the materials. By setting the connecting pipe 307 in cooperation with the first flowmeter valve 305, the feeding amount of the materials can be controlled. Through a number of first storage tanks 302, the materials can be automatically put into the treatment chambers at the top and the bottom of the treatment tank 1, which is beneficial to improving automation and accelerating the black powder recovery efficiency. At the same time, by setting the blower 310, the air charging pipe 306, the air valve 308 and the annular pipe 309, air can be filled into the connecting pipe 307, so that when the materials are fed, the materials have impact force, which plays a role in preventing blockage and improving the mixing efficiency. By setting the air valve 308, air can be filled into any one or more connecting pipes 307 according to the usage situation.

[0054] As Figure 10 As shown in the figure, the detection mechanism 13 includes a pressure sensor 1301 embedded and installed on the stirring rod 507. A rubber sleeve 1303 is sleeved on the pressure sensor 1301. A spring 1302 is installed between the pressure sensor 1301 and the rubber sleeve 1303. The pressure received by the pressure sensor 1301 is changed by the liquid compressing the rubber sleeve 1303 and the spring 1302.

[0055] It should be noted that when the black powder is mixed with water to form a slurry, stirring is required. Stirring is carried out through the stirring rod 507. During the stirring process, the pressure sensor 1301 and the spring 1302 cooperate with the rubber sleeve 1303 to monitor the pressure change during stirring. According to the pressure change, it can be judged whether the black powder and water are fully mixed to form a slurry. When the pressure change of the pressure sensor 1301 is stable, a slurry is formed. During the stirring process of pressure monitoring, it is necessary to ensure that the stirring speed value is consistent.

[0056] As Figure 4 shown, the feeding mechanism 4 includes a feeding funnel 401 installed on the top plate 6. The feeding funnel 401 is inserted into the annular block 503. A bearing plate is installed on the inner wall of the annular block 503, and a crushing block 402 is installed on the bearing plate. The crushing block 402 is located in the feeding funnel 401. A heating plate 11 is embedded at the bottom of the inner wall of the treatment tank 1. A treatment window 2 communicating with the treatment chamber is installed on the outer wall of the treatment tank 1. Support legs are installed on the bottom outer wall of the treatment tank 1, and a bottom plate 7 is installed on the bottom outer wall of the support legs. A drain pipe 804 is installed on the bottom outer wall of the reaction ring 806.

[0057] It should be noted that through the feeding funnel 401, feeding treatment can be carried out. When the black powder enters the feeding funnel 401, the large-particle black powder will be stuck in the gap between the crushing block 402 and the feeding funnel 401. By starting the stirring mechanism 5 to drive the crushing block 402 to rotate, the black powder can be extruded and crushed to increase the reaction area of the black powder and improve the reaction efficiency. Through the treatment window 2, the solid products generated in the two reaction chambers can be taken out. Through the set drain pipe 804, the liquid can be discharged, which is conducive to recycling.

[0058] A method for wet recovery and copper removal of ternary battery black powder, the method includes:

[0059] Step 1: Pulp preparation. The raw ternary black powder is put into the treatment chamber located at the top of the treatment tank 1 through the feeding mechanism 4. Water is added through the liquid adding mechanism 3 and combined with the stirring mechanism 5 to fully mix the black powder and water to prepare a uniform slurry.

[0060] Step 2: Medium leaching. Strong acid is added to the slurry through the liquid adding mechanism 3 and stirred and reacted through the stirring mechanism 5 to obtain medium leaching residue and medium leaching mother liquor. The medium leaching mother liquor and the medium leaching residue are separated through the liquid separation mechanism 12. The medium leaching residue stays in the treatment chamber located at the top of the treatment tank 1, and the medium leaching mother liquor is transported to the treatment chamber located at the bottom of the treatment tank 1.

[0061] Step 3: Leaching. Strong acid and a reducing agent are added to the medium leaching residue through the liquid adding mechanism 3 for acid leaching treatment. After the acid leaching treatment, carbon residue and acid leaching mother liquor are obtained. The acid leaching mother liquor can be recycled and used as the acid added in the medium leaching step.

[0062] Step 4: Copper removal. Adjust the pH of the medium leaching mother liquor to 3 - 5 through the liquid adding mechanism 3, heat it to a temperature above 50 °C in the treatment chamber through the heating plate 11, add sodium thiosulfate, and after fully reacting for 30 - 90 min, perform solid-liquid separation through the separation mechanism 14 to obtain the copper-removed mother liquor and copper slag. During the reaction process, draw samples through the reaction mechanism 8 to determine whether there is copper in the samples to judge whether to continue the reaction;

[0063] Step 5: Slag washing. Mix the obtained copper slag with water in a certain proportion and fully stir for 30 - 90 min, and then filter to obtain copper slag and washing water, where the mass ratio of copper slag to water is 0.1∶1.

[0064] It should be noted that the overall treatment process is as Figure 12 shown. In the medium leaching stage, the added acid can be the acid leaching mother liquor after acid leaching treatment. By using the acid leaching mother liquor as the added acid, the cost can be reduced. In the treatment process, first perform leaching reduction under acidic conditions to leach out various valuable metal elements, and reduce the high-valent metal ions to divalent through hydrogen peroxide. Then adjust the pH of the medium leaching solution to 3 - 5 and add sodium thiosulfate to it. The molar ratio of the added amount of sodium thiosulfate to the copper ions in the solution is 0.8∶1.5. After that, the obtained copper slag is further washed with water and subjected to solid-liquid separation to obtain qualified cuprous sulfide slag. The obtained copper slag has high quality. The alkaline solution for adjusting the pH of the solution during copper removal can be one or at least two combinations of sodium carbonate, sodium hydroxide, calcium hydroxide, potassium hydroxide, and barium hydroxide solutions. The thiosulfate used for copper removal is one of sodium thiosulfate, potassium thiosulfate, and ammonium thiosulfate, preferably sodium thiosulfate. The acid used for acid leaching is one of hydrochloric acid, nitric acid, and sulfuric acid. The concentration of hydrochloric acid is greater than 20%wt, the concentration of sulfuric acid is greater than 500%wt, the concentration of nitric acid is greater than 10%wt, and the reducing agent used is hydrogen peroxide, and its concentration is greater than 5%.

[0065] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended embodiments and their equivalents.

Claims

1. A ternary battery black powder wet recovery and copper removal device, comprising a processing tank (1), characterized in that: A partition (10) is installed in the middle of the inner wall of the processing tank (1), and the partition (10) divides the internal space of the processing tank (1) into two processing chambers. A top plate (6) is installed on the top of the processing tank (1), and a liquid adding mechanism (3) for adding processing liquid to the two processing chambers is installed on the top plate (6). A material discharge mechanism (4) for discharging materials is installed on the top of the processing tank (1). A stirring mechanism (5) for mixing the liquid in the processing chamber is installed on the top outer wall of the top plate (6). A reaction mechanism (8) for detecting whether the solution in the processing chamber at the bottom of the processing tank (1) contains copper is installed on the bottom outer wall of the processing tank (1). A detection mechanism (13) for monitoring the stirring effect is installed on the stirring mechanism (5); The reaction mechanism (8) comprises a liquid extraction pipe (801) installed on the outer wall of the bottom of the processing tank (1), a liquid valve (802) and a first pump (803) are installed on the liquid extraction pipe (801), the liquid extraction pipe (801) is L-shaped, a reaction base (812) is installed on the top of the outer wall of the liquid extraction pipe (801), a round block (811) is installed on the outer wall of the processing tank (1), a reaction cover (807) is installed on the round block (811), and the reaction cover (807) is installed on the reaction cover (807). A second storage tank (809) is installed on the top outer wall of the second storage tank (807), a second flow meter valve (808) is installed at the discharge pipe opening of the second storage tank (809), an arc plate (810) is installed at the top pipe opening of the liquid extraction pipe (801), a gap is left between the arc plate (810) and the top pipe opening of the liquid extraction pipe (801) for liquid discharge, a limit ring (805) is installed on the round block (811), and a reaction Ring (806), a plurality of plug blocks (814) are fixedly connected to the bottom of the inner wall of the reaction ring (806), a slot (813) corresponding to the plug block (814) is opened on the bottom outer wall of the reaction base (812), the plug block (814) is plugged into the slot (813) to complete the splicing of the reaction ring (806) and the reaction base (812), a reaction space is formed by the reaction ring (806), the reaction cover (807) and the reaction base (812), a liquid valve (802) on the liquid extraction pipe (801) cooperates with the first pump (803) to extract the solution located in the bottom processing chamber of the processing tank (1) into the reaction space, a material is put into the reaction space through the second storage tank (809) to contact with the solution and react to determine whether the solution contains copper, and a cleaning mechanism (9) for cleaning the reaction ring (806) and the reaction base (812) is installed on the liquid extraction pipe (801); The liquid adding mechanism (3) comprises a mounting block (301) embedded and mounted on a top plate (6), a plurality of first storage tanks (302) embedded and mounted on the mounting block (301), a detachable tank cover (303) mounted on the top of the first storage tank (302), a filter screen (304) embedded and mounted on the tank cover (303), a connecting pipe (307) mounted on the bottom of the first storage tank (302), and the connecting pipe (307) is fixedly connected to the top of the processing tank (1) The first storage tank (302) is used to add liquid to the processing chamber via a connecting pipe (307), a first flow meter valve (305) is installed on the connecting pipe (307), an annular tube (309) is installed on the outer wall of the processing tank (1), an air charging pipe (306) connected to the connecting pipe (307) is installed on the annular tube (309), an air valve (308) is installed on the air charging pipe (306), and a fan (310) is installed at the pipe mouth of the annular tube (309); The detection mechanism (13) comprises a pressure sensor (1301) embedded in a stirring rod (507); a rubber sleeve (1303) is sleeved on the pressure sensor (1301); a spring (1302) is installed between the pressure sensor (1301) and the rubber sleeve (1303); and the pressure on the pressure sensor (1301) is changed by compressing the rubber sleeve (1303) and the spring (1302) through liquid.

2. According to claim 1, a ternary battery black powder wet recovery and copper removal equipment is characterized by: The cleaning mechanism (9) comprises a water inlet pipe (901) mounted on the liquid extraction pipe (801), a water valve (902) being mounted on the water inlet pipe (901), the water inlet pipe (901) being located between the liquid valve (802) and the first pump (803), a horizontal plate being mounted on the outer wall of the liquid extraction pipe (801), a second gear (912) driven by a cleaning motor being mounted on the top of the horizontal plate, a plurality of corresponding annular grooves and inner grooves being provided on the outer wall and inner wall of the liquid extraction pipe (801), a second gear ring (907) being mounted in one of the annular grooves, a magnet being embedded in the inner wall of the second gear ring (907), the second gear (912) being meshed with the second gear ring (907), magnetic rings (910) being mounted in the remaining annular grooves, iron rings (908) being mounted in the inner grooves, the iron rings (908) and the magnetic rings (910) being attracted to each other, and magnets being embedded in the inner wall of the iron rings (908). A transmission rod (909) is fixedly connected to the inside of the liquid extraction tube (801), and a gap is left between the transmission rod (909) and the inside of the liquid extraction tube (801) for liquid circulation. A vertical plate (905) is connected to the outer wall of the magnetic ring (910) via a fixed rod, and a detachable cleaning plate (906) is installed on the vertical plate (905). A lifting component (904) for adjusting the height of the reaction ring (806) is installed on the limiting ring (805). The height of the reaction ring (806) is adjusted by the lifting component (904) until it fits with the cleaning plate (906), so that the reaction ring (806) and the reaction base (812) can be cleaned. An arc ring (903) is installed on the outer wall of the liquid extraction tube (801) at the top of the second gear ring (907), and a plurality of nozzles (911) facing the cleaning plate (906) are installed on the outer wall of the liquid extraction tube (801).

3. According to claim 1, a ternary battery black powder wet recovery and copper removal equipment is characterized in that: The stirring mechanism (5) comprises a first toothed ring (501) mounted on the top outer wall of the top plate (6) and a first gear (502) driven by a stirring motor, the first toothed ring (501) and the first gear (502) meshing with each other, an annular block (503) is fixedly connected to the inner wall of the first toothed ring (501), a plurality of spring telescopic rods (508) are embedded and mounted in the bottom outer wall of the annular block (503), an arc-shaped sealing block (504) is mounted on one end of the piston rod of the spring telescopic rod (508), a plurality of vertical columns (509) penetrating the arc-shaped sealing block (504) are mounted on the bottom outer wall of the annular block (503), a connecting plate (505) is mounted on the bottom outer wall of the vertical column (509), a vertical rod (506) is mounted between the bottom outer wall of the connecting plate (505) and the top outer wall of the partition (10), and a plurality of stirring rods are mounted on the outer wall of the vertical rod (506). (507), the bottom of the vertical rod (506) is a hollow structure, a sleeve (514) is fixedly connected to the inner wall of the vertical rod (506), an expansion head is installed on the outer wall of the bottom of the sleeve (514), a horizontal plate is installed on the outer wall of the sleeve (514) and the vertical rod (506), a scraper (510) that fits the inner wall of the processing tank (1) is installed on the outer wall of the horizontal plate, a convex column (511) and a pH meter are installed on the scraper (510), a plurality of inclined inclined rods (512) are installed on the bottom of the horizontal plate on the sleeve (514), and a plurality of branch rods (513) are installed on the outer wall of the inclined rod (512), a liquid separation mechanism (12) for discharging liquid in the processing chamber at the top of the processing tank (1) to the processing chamber at the bottom of the processing tank (1) is installed on the vertical rod (506), and a separation mechanism (14) for separating solids and liquids is installed on the bottom of the inner wall of the processing tank (1).

4. According to claim 3, a ternary battery black powder wet recovery and copper removal equipment is characterized in that: The liquid separation mechanism (12) comprises a liquid collecting pipe (1201) installed in the inner wall at the bottom of the vertical rod (506), a second pump (1203) is installed at the bottom of the liquid collecting pipe (1201), a plurality of liquid suction pipes (1202) are installed on the liquid collecting pipe (1201), the liquid inlets of the liquid suction pipes (1202) are located in the processing chamber at the top of the processing tank (1), and filter screens are installed at the liquid inlets of the liquid suction pipes (1202).

5. According to claim 3, a ternary battery black powder wet recovery and copper removal equipment is characterized in that: The separation mechanism (14) comprises two circular plates (1401) mounted on the bottom of the inner wall of the processing tank (1), wherein one of the circular plates (1401) is rotatably connected to the other circular plate (1401), a fan-shaped filter plate (1402) is mounted on the top outer wall of each circular plate (1401), an electromagnetic block (1403) is mounted on the top outer wall of the circular plate (1401), an iron block (1404) is wrapped on the outer wall of the electromagnetic block (1403), and the iron block (1404) is fixedly connected to the inclined rod (512).

6. The ternary battery black powder wet recovery and copper removal equipment according to claim 1 is characterized by: The material discharge mechanism (4) comprises a material discharge funnel (401) mounted on a top plate (6), the material discharge funnel (401) being inserted into an annular block (503), a bearing plate being mounted on the inner wall of the annular block (503), a crushing block (402) being mounted on the bearing plate, the crushing block (402) being located in the material discharge funnel (401), a heating plate (11) being embedded and mounted on the bottom of the inner wall of the processing tank (1), a processing window (2) connected to the processing chamber being mounted on the outer wall of the processing tank (1), supporting legs being mounted on the bottom outer wall of the processing tank (1), a bottom plate (7) being mounted on the bottom outer wall of the supporting legs, and a liquid discharge pipe (804) being mounted on the bottom of the outer wall of the reaction ring (806).

7. A method for wet recovery and copper removal of ternary battery black powder, characterized in that: A ternary battery black powder wet recovery and copper removal device as described in any one of claims 1 to 6 is used, and the method comprises: Step 1: slurry preparation, wherein the raw material ternary black powder is fed into the processing chamber located at the top of the processing tank (1) through the feeding mechanism (4), and water is added through the liquid adding mechanism (3) and the stirring mechanism (5) to fully mix the black powder and water to form a uniform slurry; Step 2: intermediate leaching: adding a strong acid to the slurry through the liquid adding mechanism (3) and stirring the slurry through the stirring mechanism (5) to obtain intermediate leaching residue and intermediate leaching mother liquor, and separating the intermediate leaching mother liquor and the intermediate leaching residue through the liquid separation mechanism (12). The intermediate leaching residue remains in the treatment chamber located at the top of the treatment tank (1), and the intermediate leaching mother liquor is transported to the treatment chamber located at the bottom of the treatment tank (1); Step 3: Leaching, adding a strong acid and a reducing agent to the intermediate leaching residue through a liquid adding mechanism (3) to carry out acid leaching treatment, and obtaining carbon slag and acid leaching mother liquor after the acid leaching treatment. The acid leaching mother liquor can be recovered and used as the acid added in the intermediate leaching step; Step 4: removing copper, adjusting the pH of the leaching mother liquor to 3-5 by means of the liquid adding mechanism (3), heating the solution to a temperature in the treatment chamber greater than 50° C. by means of the heating plate 11, and then adding sodium thiosulfate. After sufficient reaction for 30-90 minutes, solid-liquid separation is performed by means of the separation mechanism (14) to obtain a copper removal mother liquor and copper slag. During the reaction, a sample is extracted by means of the reaction mechanism (8) to determine whether the sample contains copper so as to determine whether to continue the reaction; Step 5: slag washing, mixing the obtained copper slag with water in a certain proportion, and fully stirring for 30-90 minutes, and then filtering to obtain copper slag and washing water, wherein the mass ratio of copper slag to water is 0.1:1.

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