Black powder electrolytic bath for battery

Abstract

The utility model discloses a battery black powder electrolytic bath, and relates to the technical field of waste lithium battery recycling, the battery black powder electrolytic bath comprises a bath body, a cathode piece and an anode assembly, the bath body forms an electrolytic chamber; the cathode piece is connected to the tank body and is positioned in the electrolysis chamber; the anode assembly comprises an anode frame and a filter bag, the anode frame is detachably connected to the tank body, and a bag opening of the filter bag detachably sleeves the anode frame; the anode frame and the filter bag are positioned in the electrolysis chamber; wherein the anode frame is conductive; and / or the filter bag is an inert conductive metal bag. In the technical scheme of the utility model, the anode frame is conductive or the filter bag is an inert conductive metal bag, so that the conduction of the anode in the electrolytic bath can be realized; after electrolysis is finished, after metal is separated out from the black powder ore pulp, remaining graphite mud is mixed with the electrolyte, the filter bag can filter the graphite mud in the electrolyte, the viscosity of the electrolyte is reduced, the polarization phenomenon is avoided, and therefore the electrolytic efficiency of the battery black powder can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to waste old lithium battery recovery technical field, especially in kind of battery black powder electrolytic cell. BACKGROUND

[0002] Battery black powder refers to a kind of black powder-like substance obtained after being treated by disassembling, crushing, screening, pyrolysis and other processes from waste old lithium battery. Its main components include valuable metals such as lithium, cobalt, nickel, manganese, etc., and non-metals such as carbon powder, aluminum, etc. These metals have high economic value and can be used to produce new battery materials. The recycling of battery black powder is of great significance to reducing environmental pollution and saving resources.

[0003] Black powder electrolysis refers to the process of using electrolysis to deposit valuable metal ions in leaching solution onto cathode during the recovery of battery black powder, so as to realize the separation and purification of valuable metals. Specifically, after pretreatment and leaching, battery black powder obtains leaching solution containing lithium, cobalt, nickel and other metal ions. Through electrolysis process, these metal ions can be reduced and deposited into metal on the cathode, so as to realize the recovery of metal.

[0004] Currently, the method of electrolyzing black powder is usually to use inert anode to directly electrolyze black powder slurry. However, during the electrolysis process, graphite mud will be generated on the anode, which will mix with the electrolyte and increase the viscosity of the electrolyte, resulting in slow diffusion speed of ions in the electrolyte, unable to quickly reach the electrode surface to participate in the reaction, leading to polarization phenomenon and reducing the electrolysis efficiency of battery black powder. UTILITY MODEL CONTENT

[0005] The main purpose of the utility model is to provide a kind of battery black powder electrolytic cell, to improve the electrolysis efficiency of battery black powder.

[0006] To achieve the above purpose, the battery black powder electrolytic cell provided by the utility model comprises:

[0007] Tank body, the tank body is formed with electrolysis chamber;

[0008] Cathode piece, the cathode piece is connected to the tank body and located in the electrolysis chamber;And

[0009] Anode assembly, the anode assembly includes anode frame and filter bag, the anode frame is detachably connected to the tank body, and the bag opening of the filter bag is detachably sleeved on the anode frame;The anode frame and the filter bag are located in the electrolysis chamber;

[0010] Among them, the anode frame can conduct electricity;And / or, the filter bag is inert conductive metal bag.

[0011] In an embodiment, the anode assembly further comprises a feeding main pipe, which is arranged in the tank body; the filter bag forms an anode chamber, and the feeding main pipe is connected with the anode chamber in a pipeline manner and is used for injecting black powder slurry into the anode chamber.

[0012] In an embodiment, the anode assembly comprises a plurality of the anode frames and a plurality of the filter bags, and each filter bag is connected with an anode frame.

[0013] The anode assembly further comprises a plurality of feeding branch pipes, each of which is connected with the feeding main pipe in a pipeline manner; and each feeding branch pipe is connected with an anode chamber in a pipeline manner.

[0014] In an embodiment, the battery black powder electrolytic tank further comprises a cathode moving assembly, which further comprises a lifting rod and a driving member, the driving member is arranged in the tank body, the lifting rod is connected with the output end of the driving member, and the cathode member is arranged on the lifting rod; the driving member is used for driving the lifting rod to ascend or descend so as to drive the cathode member to extend into or exit from the electrolytic chamber.

[0015] In an embodiment, the cathode moving assembly comprises two driving members and two lifting rods, the two driving members are respectively arranged on opposite sides of the tank body, each lifting rod is arranged on the same side of the tank body as the driving member, and the two lifting rods are respectively connected with two ends of the cathode member.

[0016] In an embodiment, the battery black powder electrolytic tank comprises a plurality of cathode members, and two ends of each cathode member are respectively arranged on two lifting rods.

[0017] In an embodiment, the battery black powder electrolytic tank further comprises an ultrasonic oscillator, which is arranged in the tank body and below the anode frame.

[0018] In an embodiment, the tank body is further formed with an overflow port, and the overflow port communicates with the electrolytic chamber.

[0019] In an embodiment, the height of the tank body is H, the distance between the overflow port and the bottom of the tank body is L, and L≥0.8H.

[0020] In an embodiment, the bottom of the tank body is further formed with a discharge port, and the discharge port communicates with the electrolytic chamber.

[0021] The utility model discloses a battery black powder electrolytic cell, including tank body, cathode piece and anode assembly, and the tank body forms electrolytic chamber, the cathode piece is connected in the tank body and is located electrolytic chamber, and the anode assembly includes anode frame and filter bag, and the anode frame is detachably connected in the tank body, and the bag mouth of filter bag is detachably set up in the anode frame, and the anode frame and filter bag are all located in electrolytic chamber, wherein, the anode frame can conduct electricity, and / or, filter bag is inert conductive metal bag, in the utility model discloses a technical scheme, the anode frame can conduct electricity or filter bag is inert conductive metal bag and can realize the conduction of anode in electrolytic cell, after electrolysis, after the metal of black powder ore slurry is precipitated, the graphite mud and electrolyte are mixed, and filter bag can filter graphite mud in electrolyte, thereby reducing the viscosity of electrolyte, avoiding the polarization phenomenon that the diffusion speed of ion in electrolyte slows down, thereby can improve the electrolysis efficiency of battery black powder. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, below will to the embodiment or prior art description needed to use the drawing briefly introduced, obviously, the drawing in the following description only some embodiments of the utility model, for those skilled in the art, under the premise of not paying creative labor, can also obtain other drawings according to the structure shown by these drawings.

[0023] Figure 1 The plane structure schematic diagram of one embodiment of the battery black powder electrolytic cell provided by the utility model is shown in the figure.

[0024] Figure 2 The plane structure schematic diagram of another embodiment of the battery black powder electrolytic cell provided by the utility model is shown in the figure.

[0025] Figure 3 The structure schematic diagram of the anode frame in the battery black powder electrolytic cell is shown in the figure.

[0026] Explanation of reference numerals:

[0027] Reference Name Reference Name 1000 Battery black tank 32 Filter bag 1 Tank body 32a Anode chamber 1a Electrolysis chamber 33 Feed main pipe 1b Overflow port 34 Feed branch pipe 1c Discharge port 41 Lifting rod 2 Cathode piece 5 Ultrasonic oscillator 31 Anode frame

[0028] The realization, functional characteristics and advantages of the utility model will be further described with reference to the drawings combined with embodiments. DETAILED DESCRIPTION

[0029] The technical scheme in the embodiments of the utility model will be clearly and completely described below combined with the drawings in the embodiments of the utility model, obviously, the described embodiments only part of the embodiments of the utility model, not all embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0030] It should be noted that if the embodiments of the utility model have the direction indication (such as up, down, left, right, front, back, etc.), the direction indication is only used to explain the relative position relationship, movement condition, etc. between the components in a certain specific posture, if the specific posture changes, the direction indication also changes accordingly.

[0031] In addition, if the embodiments of the utility model have the description of "first", "second" and the like, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, "and / or" or "and / or" appearing throughout the text means that the three parallel schemes are included, for example, "A and / or B" includes A scheme, or B scheme, or A and B simultaneously satisfy the scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary technical personnel, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the utility model.

[0032] The utility model provides a kind of battery black powder electrolytic cell 1000.

[0033] Please refer to Figure 1 And Figure 2 In an embodiment of the utility model, the battery black powder electrolytic cell 1000 includes tank body 1, cathode piece 2 and anode assembly, tank body 1 is formed with electrolytic chamber 1a;Cathode piece 2 is connected to tank body 1, and is located in electrolytic chamber 1a;Anode assembly includes anode frame 31 and filter bag 32, anode frame 31 is detachably connected to tank body 1, and the bag opening of filter bag 32 is detachably sleeved on anode frame 31;Anode frame 31 and filter bag 32 are all located in electrolytic chamber 1a;Wherein, anode frame 31 can conduct electricity;And / or, filter bag 32 is inert conductive metal bag.

[0034] In the technical scheme of the utility model, anode frame 31 can conduct electricity or filter bag 32 is inert conductive metal bag, and the conduction of anode in electrolytic cell can be realized;After electrolysis, graphite mud is left after black powder ore slurry precipitates metal and mixes with electrolyte, filter bag 32 can filter graphite mud in electrolyte, so as to reduce the viscosity of electrolyte, avoid the polarization phenomenon caused by the slow diffusion speed of ions in electrolyte, so as to improve the electrolysis efficiency of battery black powder.

[0035] In an embodiment of the utility model, anode frame 31 can conduct electricity. Because anode frame 31 will extend into electrolytic chamber 1a during electrolysis, anode frame 31 can conduct electricity to act as anode in electrolysis reaction.

[0036] In an embodiment of the present application, the filter bag 32 is an inert conductive metal bag. Since the filter bag 32 will extend into the electrolysis chamber 1a during electrolysis, the filter bag 32 as an inert conductive metal bag can serve as an anode in the electrolysis reaction; at the same time, the filter bag 32 as an inert conductive metal bag can avoid the reaction of the filter bag 32 with the electrolyte during electrolysis and thus avoid being dissolved to lose the function of filtering the graphite mud.

[0037] In an embodiment of the present application, the anode frame 31 is conductive, and the filter bag 32 is an inert conductive metal bag. Since the filter bag 32 and the anode frame 31 will both extend into the electrolysis chamber 1a during electrolysis, the conductive anode frame 31 and the filter bag 32 as an inert conductive metal bag can jointly serve as an anode in the electrolysis reaction; at the same time, the filter bag 32 as an inert conductive metal bag can avoid the reaction of the filter bag 32 with the electrolyte during electrolysis and thus avoid being dissolved to lose the function of filtering the graphite mud.

[0038] Please refer to Figure 1 , Figure 2 and Figure 3 In an embodiment of the present application, the anode assembly further comprises a feed main pipe 33, and the feed main pipe 33 is arranged in the tank body 1; the filter bag 32 forms an anode chamber 32a, the feed main pipe 33 is connected with the anode chamber 32a in a pipeline manner, and is used for injecting black powder ore slurry into the anode chamber 32a. By injecting the black powder ore slurry into the anode chamber 32a through the feed main pipe 33, the precise control of the ore slurry flow and distribution can be realized, and the uneven distribution of the ore slurry in the electrolytic tank is avoided, so as to reduce the electrolysis efficiency.

[0039] The anode assembly comprises a plurality of anode frames 31 and a plurality of filter bags 32; the anode assembly further comprises a plurality of feed branch pipes 34. Please refer to Figure 1 , Figure 2 and Figure 3 In an embodiment of the present application, the anode assembly comprises four anode frames 31 and four filter bags 32, and each filter bag 32 is connected to an anode frame 31; the anode assembly further comprises four feed branch pipes 34, and each feed branch pipe 34 is connected with the feed main pipe 33 in a pipeline manner; each feed branch pipe 34 is connected with an anode chamber 32a in a pipeline manner. The four feed branch pipes 34 are connected with the feed main pipe 33, so that the black powder ore slurry is evenly distributed to the four anode chambers 32a, and the appropriate amount of ore slurry can be obtained in each anode chamber 32a, so as to avoid the local accumulation or deficiency of the ore slurry in the electrolytic tank, make the feeding of the electrolysis reaction more uniform and stable, and be beneficial to improving the controllability of the electrolysis process and the consistency of the product quality.

[0040] Please refer to Figure 1 and Figure 2In an embodiment of the present application, the battery black powder electrolytic cell 1000 further comprises a cathode moving assembly, the cathode moving assembly further comprises a lifting rod 41 and a driving member, the driving member is arranged in the tank body 1, the lifting rod 41 is connected to the output end of the driving member, and the cathode member 2 is arranged on the lifting rod 41; the driving member is used for driving the lifting rod 41 to ascend and descend, so as to drive the cathode member 2 to extend into or exit the electrolysis chamber 1a. The cathode moving assembly can move the cathode member 2 out of the electrolysis chamber 1a, so that the metal precipitated from the cathode member 2 can be collected after the electrolysis is completed, the electrolyte in the electrolysis chamber 1a does not need to be emptied to collect the metal, the amount of electrolyte is saved, and the user is facilitated to take the metal.

[0041] Please refer to Figure 2 In an embodiment of the present application, the cathode moving assembly comprises two driving members and two lifting rods 41, the two driving members are respectively located on the opposite sides of the tank body 1, and each lifting rod 41 is located on the same side of the tank body 1 as a driving member; the two lifting rods 41 are respectively connected to the two ends of the cathode member 2. By connecting the two ends of the cathode member 2 through the two lifting rods 41, the cathode member 2 can be better supported and balanced during the lifting process; the two driving members are respectively located on the opposite sides of the tank body 1, and can synchronously control the lifting actions of the two lifting rods 41, which helps to realize accurate control of the lifting position of the cathode member 2, avoids the deviation or uneven lifting of the cathode member 2 caused by unilateral driving, and ensures that the contact area and reaction conditions of the cathode member 2 and the electrolyte remain consistent during the electrolysis process.

[0042] The battery black powder electrolytic cell 1000 comprises a plurality of cathode members 2. Please refer to Figure 1 and Figure 2 In an embodiment of the present application, the battery black powder electrolytic cell 1000 comprises four cathode members 2, and the two ends of each cathode member 2 are respectively arranged on the two lifting rods 41. The setting of the four cathode members 2 increases the total surface area of the cathode, thereby improving the electrolysis efficiency of the electrolytic cell, four electrolysis reactions can be carried out at the same time, the migration and deposition process of metal ions to the cathode is accelerated, and the precipitation rate and yield of the metal are improved; the four cathode members 2 are distributed in the electrolytic cell, which helps the ions in the electrolyte to be more uniformly distributed and migrated, thereby reducing the local concentration polarization phenomenon, avoiding the situation that some areas are electrolyzed too fast and other areas are electrolyzed too slowly, and ensuring that the electrolysis reaction in the entire electrolytic cell is more uniform.

[0043] Please refer to Figure 1In an embodiment of the present application, the battery black powder electrolytic cell 1000 further comprises an ultrasonic oscillator 5, which is arranged in the tank body 1 and below the anode frame 31. The ultrasonic oscillator 5 can generate high-frequency vibration, forming a large number of micro-bubbles in the electrolyte. The bubbles rapidly generate and break under the action of alternating high and low pressure, generating strong shock waves and micro-jets, thereby accelerating the migration and diffusion of ions in the electrolyte, improving the speed and efficiency of the electrolysis reaction, and accelerating the deposition rate of the metal. The ultrasonic oscillator 5 forms a strong stirring in the electrolytic cell, which can uniformly distribute the ions and substances in the electrolyte, avoiding the situation of excessively high or low local concentration, thereby effectively avoiding the generation of concentration polarization phenomenon. The ultrasonic oscillator 5 is arranged below the anode frame 31, which can directly act on the anode area, strengthening the mass transfer process of the black powder slurry in the anode chamber 32a. The cavitation effect and mechanical vibration of the ultrasonic wave can promote the contact and reaction between the black powder particles and the electrolyte, improve the deposition efficiency of the metal in the black powder, and also help to reduce the agglomeration and sedimentation of the black powder particles.

[0044] Please refer to Figure 1 In an embodiment of the present application, the tank body 1 further forms an overflow port 1b, which communicates with the electrolysis chamber 1a. The overflow port 1b can effectively control the electrolyte level in the electrolysis chamber 1a, avoiding the overflow of the electrolyte due to excessive addition or volume expansion during the electrolysis process, causing waste of electrolyte and environmental pollution. Through the setting of the overflow port 1b, the electrolyte level can be maintained in a relatively stable state, ensuring the smooth progress of the electrolysis process.

[0045] In an embodiment of the present application, the height of the tank body 1 is H, and the distance between the overflow port 1b and the bottom of the tank body 1 is L, L≥0.8H. By setting the overflow port 1b at a position at least 0.8H away from the bottom of the tank body 1, the electrolyte level can be ensured at a relatively high level. This can avoid the problem of insufficient electrolysis reaction or insufficient current density caused by low electrolyte level, ensure that there is enough amount of electrolyte in the electrolytic cell to participate in the reaction, and improve the electrolysis efficiency and product quality. By setting the overflow port 1b at a higher position, the space in the electrolytic cell can be fully utilized, and the volume of the electrolyte can be maximized. This can improve the utilization rate of the electrolyte, reduce the waste of the electrolyte, and reduce the production cost.

[0046] Please refer to Figure 1 In an embodiment of the present application, the bottom of the tank body 1 further forms a discharge port 1c, which communicates with the electrolysis chamber 1a. Through the discharge port 1c at the bottom, the continuous discharge of the material after electrolysis can be realized, which is synchronized with the electrolysis process, can improve the processing efficiency of the entire electrolysis system, reduce the downtime and cleaning time caused by material accumulation, realize the continuous and automatic electrolysis process, and improve the production efficiency.

[0047] The above merely illustrates the exemplary embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent structural transformation or direct / indirect application in other related technical fields under the technical concept of the present application and by using the content of the present application specification and drawings are included in the patent protection scope of the present application.

Claims

1. A battery black powder electrolyzer (1000) characterized by, The battery black powder electrolytic cell (1000) comprises a tank (1), a cathode member (2) connected to the tank (1) and located in an electrolytic chamber (1a) formed in the tank (1), and an anode assembly comprising an anode frame (31) detachably connected to the tank (1) and a filter bag (32) with a bag opening detachably sleeved on the anode frame (31), wherein the anode frame (31) is electrically conductive, and / or the filter bag (32) is an inert conductive metal bag. The anode assembly further comprises a main feeding pipe (33) arranged in the tank (1), and the filter bag (32) forms an anode chamber (32a), and the main feeding pipe (33) is connected to the anode chamber (32a) and used for injecting black powder slurry into the anode chamber (32a). The anode assembly comprises a plurality of anode frames (31) and a plurality of filter bags (32), and each filter bag (32) is connected to an anode frame (31). The anode assembly further comprises a plurality of feeding branch pipes (34), each of which is connected to the main feeding pipe (33) in a pipeline manner, and each feeding branch pipe (34) is connected to an anode chamber (32a) in a pipeline manner. The battery black powder electrolytic cell (1000) further comprises a cathode moving assembly, which comprises a lifting rod (41) and a driving member, the driving member is arranged in the tank (1), the lifting rod (41) is connected to the output end of the driving member, and the cathode member (2) is arranged on the lifting rod (41); the driving member is used for driving the lifting rod (41) to ascend or descend, so as to drive the cathode member (2) to extend into or exit the electrolytic chamber (1a). The cathode moving assembly comprises two driving members and two lifting rods (41), the two driving members are respectively located on opposite sides of the tank (1), each lifting rod (41) is located on the same side of the tank (1) as the driving member, and the two lifting rods (41) are respectively connected to two ends of the cathode member (2).

2. The battery vanadium electrolytic cell (1000) of claim 1, wherein, The battery black powder electrolytic cell (1000) comprises a plurality of cathode members (2), and two ends of each cathode member (2) are respectively arranged on two lifting rods (41).

3. The battery vanadium electrolytic cell (1000) of claim 2, wherein, The battery black powder electrolytic cell (1000) further comprises an ultrasonic oscillator (5) arranged in the tank (1) and located below the anode frame (31). The tank (1) further forms an overflow port (1b) communicating with the electrolytic chamber (1a).

4. The battery black electrolyzer (1000) of claim 1, wherein, The height of the tank (1) is H, the distance between the overflow port (1b) and the bottom of the tank (1) is L, and L≥0.8H.

5. The battery black electrolyzer (1000) of claim 4, wherein, The bottom of the tank (1) further forms a discharge port (1c) communicating with the electrolytic chamber (1a).

6. The battery vanadium electrolytic cell (1000) of claim 5, wherein, ​ 7. The battery vanadium electrolysis cell (1000) according to any one of claims 1 to 6, characterized in that, ​ 8. The battery vanadium electrolysis cell (1000) according to any one of claims 1 to 6, characterized in that, ​ 9. The battery vanadium electrolysis cell (1000) of claim 8, wherein, ​ 10. The battery vanadium electrolysis cell (1000) according to any one of claims 1 to 6, characterized in that, ​

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