Leaching production process of battery pole nickel sulfate raw material

Abstract

The invention discloses a battery pole nickel sulfate raw material leaching production process, and relates to the technical field of nickel sulfate production, the battery pole nickel sulfate raw material leaching production process comprises a leaching step of leaching cathode nickel in sulfuric acid under a high-temperature and high-pressure reaction kettle body to prepare a leaching solution, nitrogen is added in the leaching step, the temperature is controlled to be 170-200 DEG C, the pressure is 8.5-16 bar, and the leaching solution is obtained after the nitrogen is added in the leaching step. According to the battery pole nickel sulfate raw material leaching production process, through arrangement of a guide rod, an auger plate and a first tension spring, a third driving shaft can rotate anticlockwise along with a U-shaped limiting plate under the limitation of one guide rod, when the third driving shaft continuously rotates, the third driving shaft can be separated from the guide rod, and therefore through arrangement of the first tension spring, the battery pole nickel sulfate raw material can be leached. The third driving shaft is driven to suddenly move in the direction far away from the auger column, so that the third driving shaft drives the auger plate to move in the direction far away from the auger column through the fourth driving shaft, and the phenomenon that cathode nickel particles are gathered into piles can be effectively avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of waste battery recycling, and more specifically, the present invention relates to a production process for leaching nickel sulfate raw materials from battery electrodes. Background Art

[0002] The ordinary dry batteries we use daily mainly include two types: acidic zinc-manganese batteries and alkaline zinc-manganese batteries. They all contain various metal substances such as nickel, mercury, manganese, cadmium, lead, and zinc. After waste batteries are abandoned, the outer shells of the batteries will gradually corrode, and the heavy metal substances therein will gradually seep into water bodies and soil, causing pollution. The biggest feature of heavy metal pollution is that it cannot be degraded in nature and can only be eliminated through purification.

[0003] Although waste batteries are harmful, many of the substances therein can be recycled as raw materials. For example, lead and sulfuric acid in lead-acid batteries can be recycled for the production of new batteries; metal elements such as lithium, cobalt, and nickel in lithium-ion batteries can also be recycled.

[0004] Among them, waste batteries, especially lithium-ion batteries, are one of the main sources of cathode nickel. As one of the raw materials for making battery-grade nickel sulfate, cathode nickel is an important link in realizing the effective recycling of waste battery resources and promoting the sustainable development of the economy and society.

[0005] When preparing nickel sulfate solution from cathode nickel, it is often carried out in a high-temperature and high-pressure reaction kettle. At the same time, in order to accelerate the leaching of nickel, a stirring rod is usually installed in the autoclave to stir the leaching solution. However, when the stirring rod stirs the solution, the cathode nickel particles in the leaching solution will exhibit the tea leaf paradox phenomenon and tend to gather towards the center of the bottom surface of the reaction kettle. When the cathode nickel particles accumulate at the bottom of the reaction kettle, the contact area between these aggregated nickel particles and between them and the bottom of the reaction kettle increases. This close contact will hinder the effective dissipation of heat because the heat needs to be conducted through these dense particle layers. Since the dissipation of heat is hindered, the temperature of the aggregation site will gradually increase. Therefore, sulfides, oxides, iron, etc. in the cathode nickel will react faster with the leaching solution due to the increase in temperature, which will greatly affect the final product purity of nickel sulfate. Summary of the Invention

[0006] In view of the deficiencies of the prior art, the present invention provides a production process for leaching nickel sulfate raw materials from battery electrodes, which solves the problems raised in the above background art.

[0007] The technical solution of the present invention is as follows:

[0008] To achieve the above object, the present invention is realized by the following technical solutions: A production process for leaching nickel sulfate raw materials for battery electrodes, the production process comprising the following steps:

[0009] S1. A leaching step of leaching cathode nickel in sulfuric acid under a high-temperature and high-pressure reactor body to prepare a leaching solution. Meanwhile, nitrogen is added in the leaching step, and the temperature is controlled at 170°C to 200°C, and the pressure is 8.5 bar to 16 bar;

[0010] S2. A neutralization step of neutralizing the leaching solution prepared in the above leaching step to prepare a neutralization solution. Meanwhile, nickel powder is added in the neutralization step, and the nickel concentration in the neutralization solution is 120 g / L to 140 g / L;

[0011] S3. A filtration step of filtering the neutralization solution prepared in the above neutralization step to prepare a filtrate;

[0012] Wherein, the reactor body includes an auger column that can rotate inside, and a plurality of auger blades that can move towards the inner wall of the reactor body are uniformly arranged on the outer peripheral surface of the auger column, and the plurality of auger blades can form a conveying auger in the axial direction of the reactor body;

[0013] A conveying cylinder that can wrap the conveying auger is further arranged in the reactor body. The conveying cylinder is composed of a plurality of auger plates, and each auger plate can move away from or towards the auger column;

[0014] Preferably, the same fourth drive shaft penetrates through the adjacent auger plates along the axial direction of the auger column. The top end of the fourth drive shaft is fixedly connected to a third drive shaft, and a drive component for driving the third drive shaft to rotate around the auger column is arranged at the top inside the reactor body;

[0015] The drive component includes an internal gear ring rotatably arranged at the top inside the reactor body. A U-shaped limiting plate that can rotate with the internal gear ring is arranged directly below the internal gear ring, and the top end of the third drive shaft is slidably connected inside the U-shaped limiting plate;

[0016] A guiding rod for guiding the third drive shaft to move towards the auger column is arranged inside the reactor body;

[0017] Preferably, a plurality of second fixing columns are uniformly and fixedly connected to the lower surface of the internal gear ring, and a driven ring is fixedly connected to the bottom ends of the plurality of second fixing columns together. The open end of the U-shaped limiting plate is fixedly connected to the inner peripheral surface of the driven ring;

[0018] Preferably, a first tension spring with one end disposed on the third drive shaft is fixedly connected to the second fixed column. A first limit card slot is formed on the inner side surface of the U-shaped limit plate. The top end of the third drive shaft is fixedly connected with a limit card block with one end slidably connected in the first limit card slot, and the shape of the limit card block is rectangular.

[0019] Preferably, the driving component further includes a driving motor disposed at the top end of the reaction kettle body, a first drive shaft fixedly connected to the rotating shaft at the bottom end of the driving motor, and a driving gear fixedly connected to the bottom of the first drive shaft. The outer peripheral surface of the driving gear is engaged with a driven gear. The center of the driven gear is fixedly connected with a first fixed column with one end disposed on the inner top surface of the reaction kettle body. An auxiliary stabilizing ring is fixedly connected to the top of the inner peripheral surface of the reaction kettle body. The inner gear ring is rotatably connected to the inner peripheral surface of the auxiliary stabilizing ring. The driven gear is engaged with the inner gear ring.

[0020] The bottom end of the first drive shaft is fixedly connected with a second drive shaft. The bottom end of the second drive shaft is fixedly connected to the auger column. The bottom end of the auger column is rotatably connected to the center of the inner bottom surface of the reaction kettle body.

[0021] Preferably, the connection between the auger plate and the fourth drive shaft is a rotational connection. From bottom to top, arc-shaped first moving slots with gradually increasing arc lengths are respectively formed at the contact parts between the auger plate and the fourth drive shaft. A convex block capable of sliding in the first moving slot protrudes at each hinged part between the fourth drive shaft and each auger plate. One end of the outer peripheral surface of multiple auger plates in the counterclockwise direction is a slope. One end of the upper surface of the topmost auger plate in the clockwise direction is fixedly connected with a reset plate, and a reset component adapted to the reset plate is arranged on the lower surface of the guiding rod.

[0022] Preferably, a fixed ring plate is fixedly connected to the inner peripheral surface of the reaction kettle body near the lower part of the driven ring. One end of the guiding rod far from the second drive shaft is fixedly connected to the inner peripheral surface of the fixed ring plate.

[0023] The reset component includes a first fixed rod fixedly connected to the lower surface of the guiding rod near one end of the fixed ring plate. The bottom end of the first fixed rod is fixedly connected with a reset fixed shaft. One end of the reset fixed shaft far from the first fixed rod is rotatably connected with a fixed cylinder. An arc-shaped reset rod capable of abutting against the reset plate is fixedly connected to the outer peripheral surface of the fixed cylinder.

[0024] Preferably, a second moving slot is formed on the inner peripheral surface of the fixed cylinder. A block is fixedly connected to the outer peripheral surface of the reset fixed shaft with one end slidably connected in the second moving slot. A second spring is fixedly connected to one side of the block, and the end of the second spring far from the block is fixedly connected to the inner side wall of the second moving slot.

[0025] Preferably, a limiting groove is provided on one clockwise end of the auger plate from the first one at the bottom to the second to last one at the top, and an auxiliary driving plate adapted to the limiting groove is fixedly connected on one clockwise end of the auger plate from the second one at the bottom to the first to last one at the top.

[0026] Preferably, a plurality of auxiliary drive barrels are evenly and fixedly connected to the outer peripheral surface of the auger column, a drive rod is slidably connected inside the auxiliary drive barrel, an end of the drive rod away from the auxiliary drive barrel is fixedly connected to the corresponding auger piece, an end of the drive rod close to the auger column is fixedly connected to a first spring, and an end of the first spring away from the drive rod is fixedly connected to the inner wall of the auxiliary drive barrel.

[0027] Technical effects and advantages of the present invention:

[0028] 1. The battery pole nickel sulfate raw material leaching production process can make the third drive shaft rotate counterclockwise following the U-shaped limit plate under the restriction of a guide rod through the setting of the guide rod, the auger plate and the first tension spring. When the third drive shaft continues to rotate, the third drive shaft will be separated from the guide rod, so that through the setting of the first tension spring, the third drive shaft will be prompted to move suddenly in the direction away from the auger column. Therefore, the third drive shaft will move in the direction away from the auger column together with the auger plate through the fourth drive shaft. Therefore, when cathode nickel particles gather in the center of the bottom surface of the reactor body, they will be dispersed by the moving auger plate, so that the cathode nickel particles can be effectively avoided from gathering into piles, thereby greatly increasing the purity of the leached nickel sulfate.

[0029] 2. The battery pole nickel sulfate raw material leaching production process can limit each auger plate to rotate only on the fourth drive shaft through the setting of the protrusion. At the same time, due to the setting of the first movable groove, the maximum rotation angle of each auger plate can be limited, wherein the maximum rotation angle of the auger plate from bottom to top on the fourth drive shaft is gradually increased. Therefore, when the third drive shaft is separated from the guide rod, the third drive shaft continues to drive the auger plate to rotate again. At the same time, due to the setting of the inclined surface, when the auger plate pushes the liquid to rotate, the resistance generated by the liquid will also act on the inclined surface, thereby enabling each auger plate to rotate on the corresponding fourth drive shaft. However, because the maximum rotation angle of each is different, the counterclockwise end of the multiple auger plates from bottom to top will form an inclined surface (such as Figure 5 and Figure 7 As shown), when the inclined surface pushes the solution to move, the pushed solution will have a tendency to move upward, thereby pushing the liquid at the bottom of the reactor body upward, thereby causing the liquid at the bottom of the reactor body to mix with the liquid at the top of the reactor body, thereby causing the temperature of the solution in the reactor body to be more uniform, thereby avoiding the stratification of the temperature of the solution in the reactor body. Description of the Drawings

[0030] Figure 1 This is a schematic structural diagram of the reactor body of the present invention.

[0031] Figure 2 This is a formal cross-sectional structural diagram of the reactor body of the present invention.

[0032] Figure 3 For the present invention Figure 2 An enlarged structural diagram of the part A in the present invention.

[0033] Figure 4 For the present invention Figure 2 An enlarged structural diagram of the part B in the present invention.

[0034] Figure 5 This is a structural diagram of the auger plate when it is separated in the present invention.

[0035] Figure 6 For the present invention Figure 5 An enlarged structural diagram of the part C in the present invention.

[0036] Figure 7 This is a top view structural diagram of the auger plate when it is separated in the present invention.

[0037] Figure 8 This is a schematic structural diagram of the cooperation between the auger plate and the fourth drive shaft in the present invention.

[0038] Figure 9 This is a top view structural diagram of the cooperation between the third drive shaft and the guide rod in the present invention.

[0039] Figure 10 This is a top view structural diagram of the cooperation between the U-shaped limit plate and the third drive shaft in the present invention.

[0040] Figure 11 This is a schematic structural diagram of the cooperation when the auger blades are combined together in the present invention.

[0041] Figure 12 This is a schematic structural diagram of the cooperation between the internal gear ring, the driven gear and the driving gear in the present invention.

[0042] Figure 13 This is a schematic structural diagram of the cooperation between the first fixing rod, the reset fixing shaft and the fixing cylinder in the present invention.

[0043] Figure 14 This is a schematic structural diagram of the cooperation between the fixing cylinder, the reset fixing shaft and the second spring in the present invention.

[0044] Figure 15 This is a process flow chart of the present invention.

[0045] In the figure: 1. Reactor body; 2. First drive shaft; 3. Second drive shaft; 4. Internal gear ring; 5. Driven gear; 6. First fixed column; 7. Driving gear; 8. First tension spring; 9. Fixed ring plate; 10. Guide rod; 11. First fixed rod; 12. Fixed cylinder; 13. Arc-shaped reset rod; 14. Auger plate; 15. Auger column; 16. Auger blade; 17. Reset plate; 18. Auxiliary stabilizing ring; 19. Second fixed column; 20. Driven ring; 21. U-shaped limit plate; 22. First limit card slot; 23. Auxiliary drive barrel; 24. Drive rod; 25. First spring; 26. Third drive shaft; 27. Fourth drive shaft; 28. Auxiliary drive plate; 29. Limit slot; 30. Inclined plane; 31. First moving slot; 32. Reset fixed shaft; 33. Second moving slot; 34. Second spring; 35. Block. Detailed implementation mode

[0046] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to 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. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0047] Embodiment 1

[0048] As Figure 15 shown, in order to recycle the cathode nickel of secondary batteries, this embodiment provides a production process for leaching nickel sulfate raw materials for battery electrodes, including the following steps;

[0049] S1. A leaching step of leaching cathode nickel in sulfuric acid under high temperature and high pressure in the reactor body 1 to prepare a leaching solution. At the same time, nitrogen is added in the leaching step, and the temperature is controlled at 170°C to 200°C, and the pressure is 8.5 bar to 16 bar. Then, the reaction is carried out for 5 hours to 24 hours under the condition of adding about 1 equivalent of sulfuric acid, oxygen and / or nitrogen. The cathode nickel is cut into a size of, for example, 2 cm to 10 cm.

[0050] S2. A neutralization step of neutralizing the leaching solution prepared in the above leaching step to prepare a neutralization solution. At the same time, nickel powder is added in the neutralization step, and the nickel concentration in the neutralization solution is 120 g / L to 140 g / L.

[0051] Since the purpose of the neutralization step S2 is to neutralize the acidity of sulfuric acid present in the leaching solution, an appropriate amount of nickel powder capable of efficiently achieving the desired pH can be added. In the neutralization step S2, for example, 1.5 equivalents to 3 equivalents of nickel powder can be added. Preferably, 2 equivalents of nickel powder can be added (for example, if the final acidity of the leaching solution is 10 g / L, then 12 g / L of nickel powder is added). When using nickel powder, due to its high reactivity, the neutralization reaction proceeds well. Therefore, preferably, nickel powder is used;

[0052] S3. A filtration step of filtering the neutralization solution prepared in the above neutralization step to prepare a filtrate;

[0053] Since the cathode nickel that was not dissolved in the leaching step S1 and the neutralization step S2 remains as a solid component in the neutralization solution, the neutralization solution is transferred to a filtration device and filtered by the filtration device. The nickel sulfate solution as the filtrate is sent to the purification step, and the filter cake is placed back into the neutralization step. The nickel sulfate in the filtrate crystallizes through the purification step.

[0054] This embodiment realizes the reuse of cathode nickel, thereby enabling the effective recycling of waste battery resources and promoting the sustainable development of the economy and society.

[0055] Embodiment 2

[0056] In a rotating leaching solution, cathode nickel particles often aggregate at the center of the inner bottom surface of the reaction kettle (tea leaf paradox principle). When the cathode nickel particles aggregate at the bottom of the reaction kettle, the contact area between these aggregated nickel particles and between them and the bottom of the reaction kettle increases. This tight contact hinders the effective dissipation of heat because heat needs to be conducted through these tight particle layers. Since the dissipation of heat is hindered, the temperature of the aggregation site gradually increases. Therefore, sulfides, oxides, iron, etc. in the cathode nickel will react more quickly with the leaching solution due to the increase in temperature, which will greatly affect the final product purity of nickel sulfate. To solve the above problems, this embodiment is specifically invented.

[0057] Please refer to Figures 1 to 14 , the present invention provides a technical solution: a production process for leaching nickel sulfate raw materials for battery electrodes, including a reaction kettle body 1. The reaction kettle body 1 is a commonly used high-temperature and high-pressure reaction kettle on the market, so no detailed description will be given for the unmodified parts. A rotatable auger column 15 is arranged inside the reaction kettle body 1, and a plurality of auger blades 16 capable of moving towards the inner wall of the reaction kettle body 1 are uniformly arranged on the outer peripheral surface of the auger column 15, and the plurality of auger blades 16 can form a conveying auger in the axial direction of the reaction kettle body 1.

[0058] Inside the reactor body 1, there is also a conveying cylinder that can wrap the conveying auger. The conveying cylinder is composed of multiple auger plates 14, and the same fourth drive shaft 27 passes through the adjacent auger plates 14 along the axial direction of the auger column 15. The top end of the fourth drive shaft 27 is fixedly connected to the third drive shaft 26, and a drive component for driving the third drive shaft 26 to rotate around the auger column 15 is arranged at the top inside the reactor body 1.

[0059] The drive component includes an internal gear ring 4 rotatably arranged at the top inside the reactor body 1. A U-shaped limiting plate 21 that can rotate together with the internal gear ring 4 is arranged directly below the internal gear ring 4. The top end of the third drive shaft 26 is slidably connected inside the U-shaped limiting plate 21. Therefore, when the U-shaped limiting plate 21 rotates together with the internal gear ring 4, the third drive shaft 26 can be prompted to rotate together with the U-shaped limiting plate 21 through the setting of the U-shaped limiting plate 21.

[0060] A guide rod 10 for guiding the third drive shaft 26 to move towards the auger column 15 is arranged inside the reactor body 1.

[0061] A plurality of second fixing columns 19 are uniformly and fixedly connected to the lower surface of the internal gear ring 4. The bottom ends of the plurality of second fixing columns 19 are jointly and fixedly connected to a driven ring 20. The open end of the U-shaped limiting plate 21 is fixedly connected to the inner circumferential surface of the driven ring 20. A first tension spring 8 with one end arranged on the third drive shaft 26 is fixedly connected to the second fixing column 19.

[0062] Among them, the shape of the guide rod 10 is composed of a long strip-shaped rod and an arc-shaped block. As Figure 9 shown, in the initial state, the third drive shaft 26 is restricted by a guide rod 10 and rotates counterclockwise together with the U-shaped limiting plate 21. When the third drive shaft 26 continues to rotate, the third drive shaft 26 will disengage from the guide rod 10. Thus, through the setting of the first tension spring 8, the third drive shaft 26 will be prompted to suddenly move away from the auger column 15. Therefore, the third drive shaft 26 will drive the auger plate 14 to move away from the auger column 15 together through the fourth drive shaft 27. So when the particles of cathode nickel gather at the center of the inner bottom surface of the reactor body 1, they will be pushed and dispersed by the moving auger plate 14. Therefore, the phenomenon of cathode nickel particles aggregating into piles can be effectively avoided, and thus the purity of the leached nickel sulfate can be greatly increased.

[0063] Meanwhile, when the U-shaped limiting plate 21 drives the third drive shaft 26 to rotate continuously, the third drive shaft 26 will touch the guide rod 10 again. Therefore, the third drive shaft 26 will move along the guide rod 10 in the direction close to the auger column 15. At this time, the third drive shaft 26 is moving against the pulling force of the first tension spring 8. Therefore, when the third drive shaft 26 disengages from the guide rod 10 again, it will push and disperse the cathode nickel particles with an aggregation tendency through the auger plate 14 again, so as to continuously ensure that the cathode nickel particles will not aggregate on the inner bottom surface of the reaction kettle body 1.

[0064] Embodiment 3

[0065] On the basis of the above embodiment, although the aggregated cathode nickel particles can be pushed and dispersed, the density of the cathode nickel particles themselves is greater than that of the solution. Therefore, the cathode nickel particles will still be at the bottom of the reaction kettle. Therefore, the heat released by the reaction of the cathode nickel particles with the sulfuric acid solution will still be in the solution at the bottom of the reaction kettle. At the same time, it is relatively slow to transfer heat only by the liquid itself. Although the reaction kettle has a cooling device, the cooling device usually cools all the solutions in the reaction kettle as a whole. Therefore, the solution at the bottom of the reaction kettle will still be hotter than the solution at the upper part. Therefore, under long-term reaction, the impurities in the cathode nickel particles will still react with the leaching solution faster, thus affecting the final product purity of nickel sulfate. To solve the above problems, this embodiment is specifically invented.

[0066] Please refer to Figures 1 to 14 , on the basis of the above embodiment, the technical solution adopted includes that the inner side surface of the U-shaped limiting plate 21 is provided with a first limiting card slot 22. The two inner side surfaces of the U-shaped limiting plate 21 are both provided with the first limiting card slot 22, and the top end of the third drive shaft 26 is fixedly connected with a limiting card block whose one end is slidably connected in the first limiting card slot 22. The number of the limiting card blocks is two and they are arranged oppositely, and the shape of the limiting card block is rectangular. Therefore, when the third drive shaft 26 slides in the first limiting card slot 22, it can prevent the third drive shaft 26 from rotating on the first limiting card slot 22.

[0067] The driving component further includes a driving motor arranged at the top end of the reaction kettle body 1, a first drive shaft 2 fixedly connected to the bottom end rotating shaft of the driving motor, a driving gear 7 fixedly connected to the bottom of the first drive shaft 2. The outer peripheral surface of the driving gear 7 is engaged with a driven gear 5. The center of the driven gear 5 is fixedly connected with a first fixing column 6 whose one end is arranged on the inner top surface of the reaction kettle body 1. The top of the inner peripheral surface of the reaction kettle body 1 is fixedly connected with an auxiliary stabilizing ring 18, and the internal gear ring 4 is rotatably connected to the inner peripheral surface of the auxiliary stabilizing ring 18. The driven gear 5 is engaged with the internal gear ring 4.

[0068] Therefore, when the drive motor is working, the first drive shaft 2 can drive the driving gear 7 to rotate. Thus, when the driving gear 7 rotates, it can drive the driven gear 5 to rotate. When the driven gear 5 rotates, it can cause the internal gear ring 4 to rotate. At the same time, the rotation direction of the driving gear 7 is clockwise, so the rotation direction of the internal gear ring 4 is counterclockwise.

[0069] At the same time, when the internal gear ring 4 rotates, due to the arrangement of the second fixed column 19, it can drive the driven ring 20 to rotate together. At the same time, when the driven ring 20 rotates, it can drive the U-shaped limiting plate 21 to rotate together.

[0070] The bottom end of the first drive shaft 2 is fixedly connected to the second drive shaft 3. The bottom end of the second drive shaft 3 is fixedly connected to the auger column 15. The bottom end of the auger column 15 is rotatably connected to the center of the inner bottom surface of the reactor body 1.

[0071] Therefore, when the first drive shaft 2 rotates, it can drive the second drive shaft 3 to rotate together, so that the second drive shaft 3 can drive the auger column 15 to rotate together.

[0072] The auger plate 14 is rotatably connected to the fourth drive shaft 27. From bottom to top, the contact parts between the auger plate 14 and the fourth drive shaft 27 are respectively provided with first moving grooves 31 with gradually increasing arc lengths. And at each hinged part of the fourth drive shaft 27 and each auger plate 14, there protrudes a convex block that can slide in the first moving groove 31. One end of the outer peripheral surface of each auger plate 14 in the counterclockwise direction is a slope 30. One end of the upper surface of the topmost auger plate 14 in the clockwise direction is fixedly connected to a reset plate 17. And a reset component adapted to the reset plate 17 is arranged on the lower surface of the guide rod 10.

[0073] Through the arrangement of the convex blocks, it can be restricted that each auger plate 14 can only rotate on the fourth drive shaft 27. At the same time, due to the arrangement of the first moving groove 31, the maximum rotation angle of each auger plate 14 can be restricted. Among them, the maximum rotation angle of the auger plates 14 from bottom to top on the fourth drive shaft 27 gradually increases. Therefore, when the third drive shaft 26 disengages from the guide rod 10 and the third drive shaft 26 continues to drive the auger plate 14 to rotate again, at the same time, due to the arrangement of the slope 30, when the auger plate 14 pushes the liquid to rotate, the resistance generated by the liquid will also act on the slope 30, so that each auger plate 14 can rotate on the corresponding fourth drive shaft 27. However, because the maximum rotation angle of each is different, the counterclockwise ends of the multiple auger plates 14 from bottom to top will form an inclined surface (such as Figure 5 And Figure 7As shown in the figure, when the inclined surface acts to push the solution to move, it will cause the pushed solution to have a tendency to move obliquely upward, so as to be able to push the liquid at the bottom of the reactor body 1 upward. Therefore, it can promote the mixing of the liquid at the bottom of the reactor body 1 and the liquid at the top of the reactor body 1, so as to make the temperature of the solution in the reactor body 1 more uniform, and thus avoid the stratification of the solution temperature in the reactor body 1.

[0074] A fixed ring plate 9 is fixedly connected to the lower part of the inner peripheral surface of the reactor body 1 close to the driven ring 20. One end of the guide rod 10 far from the second drive shaft 3 is fixedly connected to the inner peripheral surface of the fixed ring plate 9, and the number of the guide rods 10 is four.

[0075] The reset component includes a first fixed rod 11 fixedly connected to one end of the lower surface of the guide rod 10 close to the fixed ring plate 9. The bottom end of the first fixed rod 11 is fixedly connected to a reset fixed shaft 32. One end of the reset fixed shaft 32 far from the first fixed rod 11 is rotatably connected to a fixed cylinder 12, and an arc-shaped reset rod 13 whose one end can abut against the reset plate 17 is fixedly connected to the outer peripheral surface of the fixed cylinder 12.

[0076] A second moving groove 33 is formed in the inner peripheral surface of the fixed cylinder 12. A clamping block 35 whose one end is slidably connected to the second moving groove 33 is fixedly connected to the outer peripheral surface of the reset fixed shaft 32. A second spring 34 is fixedly connected to one side of the clamping block 35, and the end of the second spring 34 far from the clamping block 35 is fixedly connected to the inner side wall of the second moving groove 33.

[0077] Limiting grooves 29 are formed at the clockwise ends of the first to the second last auger plates 14 from bottom to top. Auxiliary drive plates 28 adapted to the limiting grooves 29 are fixedly connected to the clockwise ends of the second to the second last auger plates 14 from bottom to top.

[0078] A plurality of auxiliary drive barrels 23 are uniformly fixedly connected to the outer peripheral surface of the auger column 15. A drive rod 24 is slidably connected in the auxiliary drive barrel 23. One end of the drive rod 24 far from the auxiliary drive barrel 23 is fixedly connected to the corresponding auger blade 16. A first spring 25 is fixedly connected to one end of the drive rod 24 close to the auger column 15, and the end of the first spring 25 far from the drive rod 24 is fixedly connected to the inner side wall of the auxiliary drive barrel 23.

[0079] Therefore, when the third drive shaft 26 is in contact with the guide rod 10 and continuously rotates, due to the arrangement of the reset plate 17, the reset plate 17 will first push against the arc-shaped reset rod 13 to rotate upward. Then, when the U-shaped limit plate 21 continuously drives the third drive shaft 26 to rotate, the third drive shaft 26 will also continuously move along the guide rod 10. When the third drive shaft 26 continuously moves, the arc-shaped reset rod 13 will gradually reset (when the arc-shaped reset rod 13 rotates upward just now, it will squeeze the second spring 34, and at this time, the second spring 34 will release elastic potential energy). When the arc-shaped reset rod 13 resets, it will push the reset plate 17, thereby causing the uppermost auger plate 14 from bottom to top to reset first. Finally, under the action of the auxiliary drive plate 28, multiple auger plates 14 from top to bottom will be reset successively. And because the third drive shaft 26 is continuously moving in the direction close to the auger column 15, one end of the arc-shaped reset rod 13 will finally also abut against the inclined surface of the reset plate 17. At the same time, when the auger plate 14 does not contact the auger blade 16, all the auger plates 14 have been reset. At the same time, when the third drive shaft 26 disengages from the guide rod 10, the arc-shaped reset rod 13 will also disengage from the reset plate 17, and then the arc-shaped reset rod 13 will return to its initial position again through the elastic potential energy released by the second spring 34.

[0080] Therefore, when the inner peripheral surface of the auger plate 14 contacts the auger blade 16, the auger plate 14 can cause the auger blade 16 to move in the direction close to the auger column 15. When the third drive shaft 26 reaches the inner peripheral surface of the arc-shaped block on the guide rod 10, the circumferential ends of the auger plate 14 at this time just abut against the circumferentially adjacent auger plates 14, thus forming a conveying cylinder of the wrapping conveyor auger. At this time, the auger plate 14 will also just form a conveyor auger on the auger column 15. Thus, through the cooperation with the conveying cylinder, the solution at the bottom end of the reactor body 1 can be conveyed upward. At the same time, when the auger plate 14 moves toward the auger column 15 and gathers, a part of the solution at different heights will be enclosed in the space between the conveying cylinder and the conveyor auger. Therefore, when the auger column 15 drives the conveyor auger to rotate, the solution at different heights can be conveyed upward for a certain distance, thereby enabling the overall temperature of the solution in the reactor body 1 to be balanced.

[0081] At the same time, when the third drive shaft 26 disengages from the guide rod 10 and the third drive shaft 26 continuously drives the auger plate 14 to rotate again, due to the arrangement of the inclined surface 30, when the auger plate 14 pushes the liquid to rotate, the resistance generated by the liquid will also act on the inclined surface 30, thereby enabling each auger plate 14 to rotate on its corresponding fourth drive shaft 27. However, because the maximum rotation angle of each is different, the counterclockwise ends of the multiple auger plates 14 from bottom to top will form an inclined surface (such as Figure 5 And Figure 7As shown, when the inclined surface acts to push the solution to move, it will cause the pushed solution to have a tendency to move upward obliquely, so as to be able to push the liquid at the bottom of the reaction kettle body 1 upward. Therefore, it can promote the mixing of the liquid at the bottom of the reaction kettle body 1 and the liquid at the top of the reaction kettle body 1, so as to make the temperature of the solution in the reaction kettle body 1 more uniform, thus avoiding the phenomenon of temperature stratification of the solution in the reaction kettle body 1.

[0082] At the same time, when the auger blade 16 is not blocked by the auger plate 14, due to the setting of the first spring 25, the auger blade 16 will move away from the auger column 15. At the same time, when the auger column 15 rotates clockwise, through the setting of the auxiliary drive barrel 23 and the drive rod 24, it can promote the auger blade 16 to rotate together with the auger column 15. Therefore, the auger blade 16 can promote the solution to rotate clockwise (the auger plate 14 can promote the solution to rotate counterclockwise). Thus, the rotation of the auger blade 16 can effectively prevent the solution from forming a vortex in the reaction kettle body 1. Therefore, the rotation of the auger blade 16 can promote the solution in the reaction kettle body 1 to form a disordered flow, and the shape of each auger blade 16 is a slope shape. So when the auger blade 16 rotates, it will also promote the solution in contact with it to flow upward, so as to be able to disrupt the flow state of the solution in the reaction kettle body 1 while better promoting the mixing of the solution at different heights in the reaction kettle body 1. Therefore, it can make the temperatures of the upper and lower parts of the solution in the reaction kettle body 1 the same.

[0083] To sum up, when the reaction kettle body 1 is in use, the liquid and the cathode nickel particles are both added into it from the top of the reaction kettle body 1. After the leaching is completed, they will be discharged from the bottom of the reaction kettle body 1, and at the same time, the remaining cathode nickel particles will also be discharged together.

[0084] Among them, when the cathode nickel particles react with the leaching solution, the auger blade 16, the auger column 15, and the auger plate 14 can form a conventional auger conveying device on the market, but its working effect is different from that of the auger conveying device on the market. The one on the market is to convey the liquid at the bottom upward, but in this patent, it is to move a part of the liquid at different heights in the reaction kettle body 1 upward by a certain position, so as to promote the overall mixing of the solution.

[0085] Meanwhile, the auger plate 14 and the auger blades 16 also function independently. When both the auger plate 14 and the auger blades 16 are away from the auger column 15, the auger plate 14 on a fourth drive shaft 27 pushes the solution to rotate while also pushing the solution upward. Each auger blade 16 also pushes the solution to rotate and upward, thus enabling better mixing of the solution at the bottom and the upper part of the reaction kettle body 1. And because the rotation directions of the auger plate 14 and the auger blades 16 are opposite, it also prevents the rotating solution from forming a vortex in the reaction kettle body 1. Therefore, it can promote the disordered flow of the solution in the reaction kettle body 1, so as to better mix the solution, and thus keep the temperatures of the upper and lower parts of the solution in the reaction kettle body 1 the same.

[0086] It should be noted that in the description of the present invention, the terms indicating directions or position relationships such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or position relationships shown in the drawings. This is only for convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0087] In addition, it should also be noted that in the description of the present invention, unless otherwise clearly specified and defined, the terms "installed", "connected", "connected to" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0088] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered by the protection scope of the present invention.

Claims

1. A battery nickel sulfate raw material leaching production process, characterized in that: The production process comprises the following steps: S1, a leaching step of leaching cathode nickel in sulfuric acid to prepare a leaching solution under a high temperature and high pressure reactor body (1), adding nitrogen during the leaching step, and controlling the temperature at 170° C. to 200° C. and the pressure at 8.5 bar to 16 bar; S2, a neutralization step of neutralizing the leachate prepared in the leaching step to prepare a neutralized solution, and simultaneously adding nickel powder in the neutralization step, and the nickel concentration in the neutralized solution is 120 g / L to 140 g / L; S3, a filtering step of filtering the neutralized solution prepared in the neutralization step to prepare a filtrate; The reactor body (1) includes a rotatable auger column (15) disposed therein, and a plurality of auger pieces (16) capable of moving toward the inner wall of the reactor body (1) are evenly disposed on the outer peripheral surface of the auger column (15), and the plurality of auger pieces (16) can form a conveying auger in the axial direction of the reactor body (1); A conveying cylinder capable of wrapping a conveying auger is also provided in the reactor body (1), wherein the conveying cylinder is composed of a plurality of auger plates (14), and each of the auger plates (14) is capable of moving in a direction away from or close to the auger column (15).

2. A battery nickel sulfate raw material leaching production process according to claim 1, characterized in that: The auger plates (14) adjacent to each other in the axial direction of the auger column (15) are all penetrated by a fourth drive shaft (27), the top end of the fourth drive shaft (27) is fixedly connected to the third drive shaft (26), and a drive component for driving the third drive shaft (26) to rotate around the auger column (15) is provided at the top of the reactor body (1); The driving component comprises an inner gear ring (4) rotatably arranged at the top of the reactor body (1); a U-shaped limit plate (21) capable of rotating along with the inner gear ring (4) is arranged directly below the inner gear ring (4); and the top end of the third driving shaft (26) is slidably connected in the U-shaped limit plate (21); A guide rod (10) is arranged inside the reactor body (1) and is used to guide the third drive shaft (26) to move towards a direction close to the auger column (15).

3. A battery nickel sulfate raw material leaching production process according to claim 2, characterized in that: The lower surface of the inner gear ring (4) is evenly fixedly connected with a plurality of second fixing columns (19), the bottom ends of the plurality of second fixing columns (19) are commonly fixedly connected with a driven ring (20), and the open end of the U-shaped limiting plate (21) is fixedly connected to the inner circumferential surface of the driven ring (20).

4. A battery nickel sulfate raw material leaching production process according to claim 3, characterized in that: The second fixed column (19) is fixedly connected to a first tension spring (8) whose end is arranged on the third drive shaft (26); the inner side surface of the U-shaped limiting plate (21) is provided with a first limiting slot (22); and the top end of the third drive shaft (26) is fixedly connected to a limiting block whose end is slidably connected to the first limiting slot (22); and the limiting block is rectangular in shape.

5. A battery nickel sulfate raw material leaching production process according to claim 4, characterized in that: The driving component also includes a driving motor arranged at the top of the reactor body (1), a first driving shaft (2) fixedly connected to the rotating shaft at the bottom of the driving motor, and a driving tooth (7) fixedly connected to the bottom of the first driving shaft (2); the outer peripheral surface of the driving tooth (7) is toothed with a driven tooth (5); the center of the driven tooth (5) is fixedly connected to a first fixing column (6) having one end arranged on the inner top surface of the reactor body (1); the top of the inner peripheral surface of the reactor body (1) is fixedly connected with an auxiliary stabilizing ring (18); the inner tooth ring (4) is rotatably connected to the inner peripheral surface of the auxiliary stabilizing ring (18), and the driven tooth (5) is toothed on the inner tooth ring (4); The bottom end of the first drive shaft (2) is fixedly connected to the second drive shaft (3), the bottom end of the second drive shaft (3) is fixedly connected to the auger column (15), and the bottom end of the auger column (15) is rotatably connected to the center of the bottom surface of the reactor body (1).

6. A battery nickel sulfate raw material leaching production process according to claim 5, characterized in that: The auger plate (14) and the fourth drive shaft (27) are rotatably connected, and the contact parts of the auger plate (14) and the fourth drive shaft (27) are respectively provided with first movable grooves (31) with gradually increasing arc lengths from bottom to top, and the hinged parts of the fourth drive shaft (27) and each auger plate (14) are protruding with protrusions that can slide in the first movable grooves (31), and the counterclockwise ends of the outer peripheral surfaces of multiple auger plates (14) are all inclined surfaces (30), and the clockwise end of the upper surface of the topmost auger plate (14) is fixedly connected to a reset plate (17), and the lower surface of the guide rod (10) is provided with a reset component adapted to the reset plate (17).

7. A battery nickel sulfate raw material leaching production process according to claim 6, characterized in that: A fixed ring plate (9) is fixedly connected to the inner circumference of the reactor body (1) below the driven ring (20), and one end of the guide rod (10) away from the second drive shaft (3) is fixedly connected to the inner circumference of the fixed ring plate (9); The reset component comprises a first fixed rod (11) fixedly connected to one end of the lower surface of the guide rod (10) near the fixed ring plate (9); the bottom end of the first fixed rod (11) is fixedly connected to a reset fixed shaft (32); the end of the reset fixed shaft (32) away from the first fixed rod (11) is rotatably connected to a fixed cylinder (12); and the outer peripheral surface of the fixed cylinder (12) is fixedly connected to an arc-shaped reset rod (13) at one end of which can abut against the reset plate (17).

8. A battery nickel sulfate raw material leaching production process according to claim 7, characterized in that: The inner circumference of the fixed cylinder (12) is provided with a second movable groove (33); the outer circumference of the reset fixed shaft (32) is fixedly connected to a clamping block (35) whose end is slidably connected to the second movable groove (33); a second spring (34) is fixedly connected to one side of the clamping block (35); and one end of the second spring (34) away from the clamping block (35) is fixedly connected to the inner wall of the second movable groove (33).

9. A battery nickel sulfate raw material leaching production process according to claim 8, characterized in that: A limiting groove (29) is provided at one clockwise end of each of the auger plates (14) from the first one at the bottom to the second to last one at the top, and an auxiliary driving plate (28) adapted to the limiting groove (29) is fixedly connected at one clockwise end of each of the auger plates (14) from the second one at the bottom to the first to last one at the top.

10. A battery nickel sulfate raw material leaching production process according to claim 9, characterized in that: A plurality of auxiliary drive barrels (23) are evenly and fixedly connected to the outer peripheral surface of the auger column (15), a drive rod (24) is slidably connected inside the auxiliary drive barrel (23), one end of the drive rod (24) away from the auxiliary drive barrel (23) is fixedly connected to the corresponding auger piece (16), one end of the drive rod (24) close to the auger column (15) is fixedly connected to a first spring (25), and one end of the first spring (25) away from the drive rod (24) is fixedly connected to the inner wall of the auxiliary drive barrel (23).

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