Efficient continuous leaching device for powder containing nickel, cobalt and manganese

Abstract

The utility model relates to the technical field of ternary lithium battery material recovery, in particular to an efficient continuous leaching device for nickel-cobalt-manganese-containing powder, which comprises a stirring slurrying tank, a first-stage overflow tank, a second-stage overflow tank, a third-stage overflow tank and a buffer tank which are sequentially connected through a slurry conveying pipe, a first-stage overflow pipe, a second-stage overflow pipe and a third-stage overflow pipe. The buffer tank is connected with a leaching filter press through a slurry liquid filter pipe, the leaching filter press is connected with a leaching liquid output pipe, the lower part of the leaching filter press is connected with a leaching residue washing tank through a chute I, the leaching residue washing tank is connected with a washing residue filter press through a washing residue output pipe, and the washing residue filter press is connected with a stirring slurrying tank through a washing liquid circulating pipe; and a chute II is arranged at the bottom of the washing slag filter press. The ternary lithium battery powder leaching device is provided with the stirring pulpifying tank, the multi-stage overflow tank, the buffer tank, the leaching residue washing tank and the two filter presses, is simple and clear in structure, has extremely high automation degree and working efficiency, and can effectively improve the leaching efficiency of ternary lithium battery powder.

Description

TECHNICAL FIELD

[0001] The utility model relates to ternary lithium battery material recovery technical field, concretely relates to a kind of efficient continuous leaching device of nickel cobalt manganese powder. BACKGROUND

[0002] With the rapid development of electric vehicles and renewable energy, as important energy storage equipment, the market demand of ternary lithium battery is increasing, but with the rapid growth of ternary lithium battery usage, there are also a large number of retired ternary lithium batteries in the market that need to be recycled and disposed of. Retired batteries belong to the category of hazardous waste, and arbitrary disposal will inevitably cause irreparable harm to the environment. Recycling valuable metals in ternary lithium batteries not only has high economic benefits, but also helps to reduce environmental pollution and protect the ecological environment.

[0003] Leaching treatment of waste ternary lithium battery powder is an important step in the recycling process of ternary lithium battery. Currently, ternary lithium battery powder leaching devices generally use single reaction tank for intermittent leaching. Due to the need to wait for the leaching period, intermittent leaching takes a long time, production efficiency is low, labor intensity is increased, repeated start and stop of leaching device leads to energy waste and cost increase; in a leaching period, there may be insufficient reaction time and insufficient leaching; periodic leaching may result in uneven leaching of materials. SUMMARY

[0004] To solve the problems of low production efficiency, increased labor intensity, energy waste, cost increase, insufficient leaching and uneven leaching of intermittent leaching devices in the prior art, the utility model provides an efficient continuous leaching device for nickel cobalt manganese powder.

[0005] To achieve the above purpose, the utility model provides an efficient continuous leaching device for nickel cobalt manganese powder, which comprises a stirring slurry tank, a first overflow tank, a second overflow tank, a third overflow tank, a buffer tank and a leaching residue washing tank. A slurry delivery pipe is connected between the stirring slurry tank and the first overflow tank. A first overflow pipe, a second overflow pipe and a third overflow pipe are connected in sequence between the first overflow tank, the second overflow tank, the third overflow tank and the buffer tank. The buffer tank is connected to a leaching filter press through a slurry filter pipe. The leaching filter press is connected to a leaching liquid output pipe. A chute one is provided at the lower part of the leaching filter press. The chute one is connected to the leaching residue washing tank. The leaching residue washing tank is connected to a washing residue filter press through a washing residue output pipe. A washing liquid circulation pipe is connected between the washing residue filter press and the stirring slurry tank. A chute two is provided at the bottom of the washing residue filter press.

[0006] Further, one end of the slurry conveying pipe extends into the bottom of the top of the primary overflow tank, one end of the primary overflow pipe, the secondary overflow pipe and the tertiary overflow pipe is connected with the upper part of the primary overflow tank, the secondary overflow tank and the tertiary overflow tank respectively, and the other end of the primary overflow pipe and the secondary overflow pipe extends into the bottom of the top of the secondary overflow tank and the tertiary overflow tank respectively.

[0007] Further, the upper part of the stirring slurry tank, the primary overflow tank, the secondary overflow tank, the tertiary overflow tank, the buffer tank and the leaching residue washing tank is provided with a stirring motor, the output end of the stirring motor is connected with a stirring shaft, and the end of the stirring shaft is connected with a stirring paddle.

[0008] Further, the stirring slurry tank and the leaching residue washing tank are respectively connected with water inlet pipe one and water inlet pipe two, and the top of the stirring slurry tank is provided with a powder feeding port.

[0009] Further, the top end of the primary overflow tank is connected with a sulfuric acid liquid inlet pipe and a sodium pyrosulfite liquid inlet pipe.

[0010] Further, the slurry conveying pump one is arranged on the slurry conveying pipe, the slurry conveying pump two is arranged on the slurry pressure filter pipe, and the washing residue output pump is arranged on the washing residue output pipe.

[0011] The beneficial effects of the present application are as follows:

[0012] The stirring slurry tank, the multi-stage overflow tank, the buffer tank, the leaching residue washing tank and the two pressure filters are arranged in the present application, the device has simple and clear structure, high automation degree and work efficiency, and the leaching efficiency of the ternary lithium battery powder can be effectively improved.

[0013] In the present application, the device can be continuously operated while feeding and leaching, the periodic leaching problem is effectively avoided, the operation process is simplified, the production efficiency is accelerated, the stability of the device operation is improved, and the leaching rate and uniformity of the valuable metals in the ternary lithium battery powder are ensured through the three-stage leaching process.

[0014] In the present application, the device strengthens the recycling of the pressure filter water, increases the utilization rate of water resources, and can further recover the nickel-cobalt valuable metals in the pressure filter water, reduces the generation of waste water, has good economic benefits, and is more friendly to the environment. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme of the present application, the drawings needed to be used in the description of the embodiments or prior art will be briefly introduced as follows. Obviously, the drawings described below are only some of the embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of these drawings.

[0016] Figure 1 It is a whole structure schematic diagram of the leaching device;

[0017] Wherein: 1 - stirring pulp tank, 2 - first overflow tank, 3 - second overflow tank, 4 - third overflow tank, 5 - buffer tank, 6 - leaching residue washing tank, 7 - slurry delivery pipe, 8 - first overflow pipe, 9 - second overflow pipe, 10 - third overflow pipe, 11 - slurry filter pipe, 12 - leaching filter press, 13 - leaching liquid output pipe, 14 - chute one, 15 - washing residue output pipe, 16 - washing residue filter press, 17 - washing liquid circulation pipe, 18 - chute two, 19 - water inlet pipe one, 20 - water inlet pipe two, 21 - powder feeding port, 22 - sulfuric acid inlet pipe, 23 - sodium metabisulfite inlet pipe, 24 - slurry delivery pump one, 25 - slurry delivery pump two, 26 - washing residue output pump. DETAILED DESCRIPTION

[0018] The technical scheme in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0019] In one specific embodiment of the present application, a high-efficiency continuous leaching device for nickel-cobalt-manganese-containing powder is shown in Figure 1 Fig. 1, which comprises a stirring pulp tank 1, a first overflow tank 2, a second overflow tank 3, a third overflow tank 4, a buffer tank 5 and a leaching residue washing tank 6. The stirring pulp tank 1 is connected with the slurry delivery pipe 7 between the stirring pulp tank 1 and the first overflow tank 2. The first overflow tank 2, the second overflow tank 3, the third overflow tank 4 and the buffer tank 5 are sequentially connected with the first overflow pipe 8, the second overflow pipe 9 and the third overflow pipe 10. The buffer tank 5 is connected with the leaching filter press 12 through the slurry filter pipe 11. The leaching filter press 12 is connected with the leaching liquid output pipe 13. The lower part of the leaching filter press 12 is provided with the chute one 14, which is connected with the leaching residue washing tank 6. The leaching residue washing tank 6 is connected with the washing residue filter press 16 through the washing residue output pipe 15. The washing residue filter press 16 is connected with the stirring pulp tank 1 through the washing liquid circulation pipe 17. The bottom of the washing residue filter press 16 is provided with the chute two 18.

[0020] One end of the slurry conveying pipe 7 extends into the bottom of the top of the primary overflow tank 2, the primary overflow pipe 8, the secondary overflow pipe 9 and the tertiary overflow pipe 10 are connected with the upper part of the primary overflow tank 2, the secondary overflow tank 3 and the tertiary overflow tank 4 respectively, and the other end of the primary overflow pipe 8 and the secondary overflow pipe 9 extends into the bottom of the top of the secondary overflow tank 3 and the tertiary overflow tank 4 respectively.

[0021] The upper part of the stirring slurry tank 1, the primary overflow tank 2, the secondary overflow tank 3, the tertiary overflow tank 4, the buffer tank 5 and the leaching residue washing tank 6 is provided with a stirring motor, the output end of the stirring motor is connected with a stirring shaft, and the end of the stirring shaft is connected with a stirring paddle.

[0022] The stirring slurry tank 1 and the leaching residue washing tank 6 are respectively connected with a water inlet pipe one 19 and a water inlet pipe two 20, and the top of the stirring slurry tank 1 is provided with a powder feeding port 21.

[0023] The top end of the primary overflow tank 2 is connected with a sulfuric acid inlet pipe 22 and a sodium pyrosulfite inlet pipe 23.

[0024] The slurry conveying pump one 24 is arranged on the slurry conveying pipe 7, the slurry conveying pump two 25 is arranged on the slurry pressure filtering pipe 11, and the washing residue output pump 26 is arranged on the washing residue output pipe 11.

[0025] The use process of the utility model is as follows:

[0026] The waste ternary lithium battery powder is subjected to leaching treatment, and the main components of the waste ternary lithium battery powder are as shown in the following table 1.

[0027] Table 1 main components of waste ternary lithium battery powder

[0028] Ingredients Li Ni Co Mn Cu Fe Al Content / % 6.61 34.17 17.24 14.31 0.01 0.78 0.15

[0029] A specific working scheme of the utility model is as follows:

[0030] The waste ternary lithium battery powder is added into the stirring slurry tank 1 from the powder feeding port 21 at a speed of 400kg / h, water is added into the stirring slurry tank 1 from the water inlet pipe one 19 or the washing liquid circulating pipe 17 at a speed of 2.4m 3 / h, the stirring is carried out to form a slurry, the liquid-solid ratio is 6:1, the slurry is punched into the bottom of the primary overflow tank 2 from the stirring slurry tank 1 at a speed of 2.4m 3 / h by the slurry conveying pump one 24, and the slurry is punched into the bottom of the secondary overflow tank 3 from the primary overflow tank 2 at a speed of 0.4m 3The concentrated sulfuric acid and sodium metabisulfite slurry is added to the first overflow tank 2 through the sulfuric acid inlet pipe 22 and the sodium metabisulfite inlet pipe 23 at a speed of 300 kg / h, and as the material is continuously injected, the slurry is overflowed from the first overflow tank 2 into the second overflow tank 3, then into the third overflow tank 4, and finally into the buffer tank 4, and the slurry is sent to the leaching filter press 12 for pressure filtration by using the slurry pump 2 5, and the filtrate contains the following valuable metal contents: Li: 8.2 g / L, Ni: 41.7 g / L, Co: 20.8 g / L, and Mn: 17.3 g / L, and the filtrate is the leaching solution of the valuable metals in the powder, which is discharged through the leaching solution outlet pipe 13 and collected for further treatment, and the filter cake is sent to the leaching residue washing tank 6 through the chute 1 4, and water is added to the leaching residue washing tank 6 through the water inlet pipe 2 0 for stirring and washing, and the slurry is sent to the washing residue pressure filter 16 for pressure filtration treatment by using the washing residue output pump 26, and the filtrate is sent to the stirring slurry tank 1 through the washing liquid circulation pipe 17 for recycling, and the filter cake is discharged from the chute 2 18; through detection and calculation, the lithium leaching rate is 99.2%, the nickel leaching rate is 97.5%, the cobalt leaching rate is 96.52%, and the manganese leaching rate is 96.8%.

[0031] Another specific working scheme of the utility model is as follows:

[0032] The waste ternary lithium battery powder is added to the stirring slurry tank 1 from the powder inlet 21 at a speed of 300 kg / h, water is added to the stirring slurry tank 1 from the water inlet pipe 1 9 or the washing liquid circulation pipe 17 at a speed of 3 m 3 / h, the stirring is a slurry, the liquid-solid ratio is 10:1, the slurry is punched into the bottom of the first overflow tank 2 from the stirring slurry tank 1 at a speed of 3 m 3 / h by using the slurry pump 1 24, and at the same time, the slurry is punched into the bottom of the first overflow tank 2 at a speed of 0.3 m 3The concentrated sulfuric acid and sodium metabisulfite slurry are added into the first overflow tank 2 through the sulfuric acid inlet pipe 22 and the sodium metabisulfite inlet pipe 23 at a speed of / h, and as the material is continuously injected, the slurry is overflowed from the first overflow tank 2 into the second overflow tank 3, then into the third overflow tank 4, and finally into the buffer tank 4, and the slurry is sent to the leaching filter press 12 for pressure filtration by using the slurry pump 2 5, the content of each valuable metal in the filtrate is: Li: 5.96g / L, Ni: 31.7g / L, Co: 15.7g / L, Mn: 13.2g / L, the filtrate is the leaching solution of the valuable metals in the powder, and after being discharged through the leaching solution outlet pipe 13, the filtrate is collected for further treatment, and the filter cake is sent into the leaching residue washing tank 6 through the chute 1 4, water is added into the leaching residue washing tank 6 through the water inlet pipe 2 0 for stirring and washing, and the slurry is sent into the washing residue filter press 16 for pressure filtration treatment by using the washing residue output pump 26, the filtrate is sent into the stirring and slurry tank 1 through the washing liquid circulation pipe 17 for reuse, and the filter cake is discharged from the chute 2 18; through detection and calculation, the lithium leaching rate is 99.5%, the nickel leaching rate is 98.1%, the cobalt leaching rate is 97.2%, and the manganese leaching rate is 97.7%.

[0033] The various preferred and optional technical means disclosed in the utility model can be combined arbitrarily to form several different technical schemes, and therefore equivalent changes made according to the claims still fall within the scope of the utility model.

Claims

1. A high efficiency continuous leaching apparatus for a nickel cobalt manganese containing powder, characterized by, The device comprises a stirring slurry tank (1), a first overflow tank (2), a second overflow tank (3), a third overflow tank (4), a buffer tank (5) and a leaching residue washing tank (6), a slurry conveying pipe (7) is connected between the stirring slurry tank (1) and the first overflow tank (2), a first overflow pipe (8), a second overflow pipe (9) and a third overflow pipe (10) are sequentially connected between the first overflow tank (2), the second overflow tank (3), the third overflow tank (4) and the buffer tank (5), the buffer tank (5) is connected with a leaching filter press (12) through a slurry filter pipe (11), the leaching filter press (12) is connected with a leaching liquid output pipe (13), a chute one (14) is arranged at the lower part of the leaching filter press (12), the chute one (14) is connected with the leaching residue washing tank (6), the leaching residue washing tank (6) is connected with a washing residue filter press (16) through a washing residue output pipe (15), a washing liquid circulating pipe (17) is connected between the washing residue filter press (16) and the stirring slurry tank (1), a chute two (18) is arranged at the bottom of the washing residue filter press (16).

2. A high efficiency continuous leaching device for a nickel, cobalt and manganese containing powder according to claim 1, characterized in that, One end of the slurry conveying pipe (7) extends from the top to the bottom of the first overflow tank (2), one end of the first overflow pipe (8), the second overflow pipe (9) and the third overflow pipe (10) is connected with the upper part of the first overflow tank (2), the second overflow tank (3) and the third overflow tank (4) respectively, and the other end of the first overflow pipe (8) and the second overflow pipe (9) extends from the top to the bottom of the second overflow tank (3) and the third overflow tank (4) respectively.

3. The apparatus for efficient continuous leaching of a nickel-cobalt-manganese containing powder batch according to claim 1, characterized in that, Stirring motors are installed at the upper part of the stirring slurry tank (1), the first overflow tank (2), the second overflow tank (3), the third overflow tank (4), the buffer tank (5) and the leaching residue washing tank (6), the output end of the stirring motor is connected with a stirring shaft, and the end of the stirring shaft is connected with a stirring paddle.

4. The apparatus for efficient continuous leaching of a nickel-cobalt-manganese containing powder batch according to claim 1, characterized in that, The stirring slurry tank (1) and the leaching residue washing tank (6) are respectively connected with a water inlet pipe one (19) and a water inlet pipe two (20), and a powder feeding port (21) is arranged at the top of the stirring slurry tank (1).

5. The apparatus for efficient continuous leaching of a nickel-cobalt-manganese containing powder batch according to claim 1, characterized in that, The top end of the first overflow tank (2) is connected with a sulfuric acid liquid inlet pipe (22) and a sodium pyrosulfite liquid inlet pipe (23).

6. The apparatus for efficient continuous leaching of a nickel, cobalt and manganese containing powder batch according to claim 1, characterized in that, A slurry conveying pump one (24) is arranged on the slurry conveying pipe (7), a slurry conveying pump two (25) is arranged on the slurry filter pipe (11), and a washing residue output pump (26) is arranged on the washing residue output pipe (15).

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