Electrolytic manganese metal production section manganese sulfate slurry separation and thickening system and method

Abstract

The present application relates to electrolytic manganese production technical field, propose a kind of electrolytic manganese preparation liquid section manganese sulfate slurry separation and thickening system and method, including for generating the neutralization oxidation tank of manganese sulfate slurry to be handled, the top of neutralization oxidation tank is connected with first delivery pump by conduit, the export end of first delivery pump is connected with thickener, the export end of thickener is connected with second delivery pump by conduit, the export end of second delivery pump is connected with transfer buffer tank for receiving thickener underflow by conduit, the export end of transfer buffer tank is connected with third delivery pump by conduit, the export end of third delivery pump is connected with van type filter press by conduit, and the washing liquid inlet of van type filter press is connected with washing liquid supply device.The present application is designed by systematization, and significant beneficial effects are brought in efficiency, recovery rate, automation and equipment life, and efficient, reliable solution is provided for electrolytic manganese production.

Description

Technical Field

[0001] This invention relates to the field of electrolytic manganese production technology, specifically to a system and method for separating and thickening manganese sulfate slurry in the electrolytic manganese liquid preparation stage. Background Technology

[0002] In the electrolytic production of manganese metal, the solution preparation section is a crucial step. Its core task is to separate and concentrate the manganese sulfate slurry produced in the neutralization and oxidation tank to obtain a high-concentration manganese sulfate solution for electrolytic use. Traditional processes often use filter presses to directly dewater the slurry, but this approach has the following problems:

[0003] First, the slurry produced by the existing neutralization oxidation tank has a low solids concentration, and direct pressure filtration requires the treatment of a large amount of liquid, resulting in a high equipment load and low efficiency.

[0004] Secondly, traditional processes rely on a single filter press step without pre-concentrating the slurry, resulting in long filter press processing times and limited capacity. When directly filtering low-concentration slurries, the filter cloth is prone to clogging and requires frequent cleaning, affecting continuous production.

[0005] Third, the manganese element remaining in the filter cake after pressure filtration is not fully washed away, resulting in low manganese recovery rate and increased raw material loss;

[0006] In view of this, the present invention proposes a system and method for separating and thickening manganese sulfate slurry in the electrolytic manganese metal solution production process. Summary of the Invention

[0007] This invention proposes a system and method for separating and thickening manganese sulfate slurry in the electrolytic manganese metal liquid production process, which solves the problem of high equipment load and low efficiency caused by the need to process large amounts of liquid through direct pressure filtration of slurry in the prior art.

[0008] The technical solution of the present invention is as follows: A system for separating and thickening manganese sulfate slurry in an electrolytic manganese metal liquid production section, comprising a neutralization and oxidation tank for generating manganese sulfate slurry to be treated, a first conveying pump connected to the top of the neutralization and oxidation tank via a conduit, a thickening device for gravity sedimentation separation of the slurry connected to the outlet of the first conveying pump, a second conveying pump connected to the outlet of the thickening device via a conduit, a transfer buffer tank for receiving the underflow from the thickening device connected to the outlet of the transfer buffer tank via a conduit, a third conveying pump connected to the outlet of the third conveying pump via a conduit, a chamber filter press connected to the outlet of the chamber filter press via a conduit, and a washing liquid supply device connected to the washing liquid inlet of the chamber filter press.

[0009] Preferably, the thickening device includes a settling cylinder, with a slurry inlet pipe fixedly connected to the inlet end of the settling cylinder, the inlet end of the slurry inlet pipe being connected to the outlet end of the first conveying pump, an overflow pipe for discharging overflow liquid fixedly connected to one end of the top of the settling cylinder, a discharge pipe for discharging concentrated underflow fixedly connected to the bottom of the settling cylinder, a support fixedly connected to the top of the settling cylinder, and a stirring mechanism provided on the inner side of the support.

[0010] Preferably, the stirring mechanism includes a stirring shaft rotatably connected to the bottom of the support, a plurality of first stirring impellers equidistantly distributed along the axial direction of the stirring shaft are fixedly connected to the outer side of the stirring shaft, a drive motor is fixedly connected to the top of the support, the output shaft of the drive motor is fixedly connected to the stirring shaft, a connecting seat is fixedly connected to the top of the stirring shaft, a rotating shaft is rotatably connected to one end of the connecting seat, a plurality of second stirring impellers equidistantly distributed along the axial direction of the rotating shaft are fixedly connected to the outer side of the rotating shaft, the plurality of second stirring impellers and the first stirring impellers are alternately distributed, and a transmission component is provided at the top of the rotating shaft to drive the rotating shaft to rotate by cooperating with the start of the drive motor.

[0011] Preferably, the transmission component includes a fixed sleeve fixedly connected to the bottom of the bracket, the fixed sleeve being sleeved on the outside of the stirring shaft and rotatably connected to the stirring shaft, a first gear being fixedly connected to the bottom of the fixed sleeve, and a second gear being fixedly connected to the top of the rotating shaft, the second gear meshing with the first gear.

[0012] Preferably, the ratio of the number of teeth of the second gear to the number of teeth of the first gear is 2:1.

[0013] Preferably, a limiting component is provided between the rotating shaft and the connecting seat. The limiting component includes a bushing fixedly connected to the rotating shaft. The bushing is rotatably connected to the connecting seat, and both ends of the bushing are fixedly connected to limiting rings.

[0014] Preferably, the connecting seat is provided with a scraping component, which includes a connecting frame fixedly connected to the end of the connecting seat, a sliding rod slidably connected to the bottom end of the connecting frame and penetrating the bottom wall of the connecting frame, a scraper fixedly connected to one end of the sliding rod and the scraper abutting against the inner wall of the settling cylinder, and a stop block fixedly connected to the other end of the sliding rod.

[0015] Preferably, a spring is sleeved on the outer side of the slide rod, one end of the spring abuts against the scraper, and the other end of the spring abuts against the connecting frame.

[0016] Preferably, the washing liquid supply device provides hot water, dilute manganese sulfate solution, or dilute washing liquid from subsequent processes.

[0017] This invention also provides a method for separating and thickening manganese sulfate slurry in an electrolytic manganese metal solution production process, comprising the following steps:

[0018] S1. Pre-concentration: The manganese sulfate slurry from the neutralization oxidation tank is pumped into the thickening device through the first transfer pump for gravity sedimentation, while flocculant is added to obtain the upper overflow liquid and the bottom concentrated slurry.

[0019] S2, Buffering and Transport: The concentrated mud in S1 is pumped into the transfer buffer tank for temporary storage via the second transport pump;

[0020] S3. Filtration and Washing: The concentrated slurry in the transfer buffer tank is pumped into the chamber filter press by the third transfer pump for filtration to form filter cake and filtrate; during the filtration process, washing liquid is introduced into the chamber filter press through the washing liquid supply device to wash the filter cake.

[0021] S4. Solution collection: Collect the overflow liquid generated in step S1, the filtrate generated in step S3 and the washing liquid together to obtain the thickened manganese sulfate solution.

[0022] S5. Unloading: After the filter press and washing are completed, unload the filter cake from the chamber filter press.

[0023] The working principle and beneficial effects of this invention are as follows:

[0024] 1. The system adopts a tiered process of "thickening pre-concentration + deep dewatering by pressure filtration" to replace the traditional single pressure filtration method, which significantly improves the processing capacity and operational stability. The thickening device pre-concentrates the low-concentration slurry, reducing the amount of liquid directly filtered, thereby reducing the load on the chamber filter press. The system integrates the transfer pump, buffer tank and filter press, and the pump valves are coordinated by an automated control device to reduce human error and ensure continuous production.

[0025] 2. The thickening device, as the core of pre-concentration, solves the problems of low slurry solid concentration and easy sedimentation through gravity settling and optimized stirring mechanism; the stirring mechanism adopts a two-way impeller design to form turbulence, promote the uniform distribution of flocculant, and prevent solid particles from caking.

[0026] 3. Introduce a washing liquid supply device during the filter press stage to wash the filter cake and effectively recover residual manganese. Using hot water, dilute manganese sulfate solution, or dilute washing liquid from subsequent processes for washing can significantly improve the manganese recovery rate in the filter cake and reduce raw material waste. By collecting overflow liquid, filtrate, and washing liquid, a thickened manganese sulfate solution is obtained, achieving wastewater reduction and resource utilization.

[0027] 4. The gear transmission (gear ratio 2:1) and limit components of the stirring mechanism ensure the stability of the rotating shaft, reduce vibration and wear, and extend the mechanical life; the slurry is temporarily stored in the transfer buffer tank to avoid load fluctuations of the filter press and improve production continuity. Attached Figure Description

[0028] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0029] Figure 1 This is a schematic diagram of the structure of a system for separating and thickening manganese sulfate slurry in the electrolytic manganese metal solution production section of the present invention. Figure 1 ;

[0030] Figure 2 This is a schematic diagram of the structure of a system for separating and thickening manganese sulfate slurry in the electrolytic manganese metal solution production section of the present invention. Figure 2 ;

[0031] Figure 3 This is a schematic diagram of the structure of the thickening device of the present invention. Figure 1 ;

[0032] Figure 4 This is a schematic diagram of the structure of the thickening device of the present invention. Figure 2 ;

[0033] Figure 5 This is a schematic diagram of the stirring mechanism of the present invention;

[0034] Figure 6 This is a schematic diagram of the transmission component of the present invention;

[0035] Figure 7 This is a schematic diagram of the structure of the limiting member of the present invention;

[0036] Figure 8 This is a schematic diagram of the scraper component of the present invention.

[0037] In the diagram: 1. Neutralization oxidation tank; 2. First transfer pump; 3. Thickening device; 31. Settling cylinder; 32. Slurry inlet pipe; 33. Overflow pipe; 34. Support; 35. Stirring mechanism; 351. Stirring shaft; 352. Drive motor; 353. First stirring impeller; 354. Connecting seat; 355. Rotating shaft; 356. Second stirring impeller; 357. Transmission component; 3571. Fixed sleeve; 3572. First gear; 3573. Second gear; 358. Scraper; 3581. Connecting frame; 3582. Slide rod; 3583. Scraper; 3584. Spring; 3585. Stop block; 359. Limiting component; 3591. Shaft sleeve; 3592. Limiting ring; 36. Discharge pipe; 4. Second transfer pump; 5. Transfer buffer tank; 6. Third transfer pump; 7. Chamber filter press. Detailed Implementation

[0038] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0039] like Figures 1 to 8 As shown in the figure, this embodiment proposes a system for separating and thickening manganese sulfate slurry in the electrolytic manganese metal solution production section. It includes a neutralization and oxidation tank 1 for generating the manganese sulfate slurry to be treated. A first transfer pump 2 is connected to the top of the neutralization and oxidation tank 1 via a conduit. A thickening device 3 for gravity sedimentation separation of the slurry is connected to the outlet of the first transfer pump 2. A second transfer pump 4 is connected to the outlet of the second transfer pump 4 via a conduit. A transfer buffer tank 5 for receiving the underflow from the thickening device 3 is connected to the outlet of the transfer buffer tank 5 via a conduit. A third transfer pump 6 is connected to the outlet of the third transfer pump 6 via a conduit. A chamber filter press 7 is connected to the washing liquid inlet of the chamber filter press 7. The washing liquid supply device provides washing liquid that is hot water, dilute manganese sulfate solution, or dilute washing liquid from subsequent processes.

[0040] In this embodiment, the system starts with neutralization oxidation tank 1. Manganese sulfate slurry is pumped into thickening device 3 via first transfer pump 2 for gravity sedimentation pre-concentration. The overflow liquid (clarified liquid) separated by the thickening device directly enters the filtrate collection system, while the concentrated underflow is temporarily stored in transfer buffer tank 5 via second transfer pump 4. Subsequently, the concentrated slurry is pumped into chamber filter press 7 by third transfer pump 6. During the filter press process, hot water or dilute manganese sulfate solution is injected through a washing liquid supply device to wash the filter cake. Finally, the concentrated overflow liquid, filter press filtrate, and washing liquid are collected to obtain a thickened manganese sulfate solution, and the filter cake is discharged. The entire process is coordinated by an automated control device to ensure continuous operation. Through the tiered process of "thickening pre-concentration + deep dehydration by filter press," the system's processing capacity is improved, and the concentration of manganese sulfate solution is significantly increased to meet electrolysis requirements. The washing process recovers the manganese liquid entrained in the filter cake, greatly improving the manganese recovery rate and reducing resource waste. The automated control device ensures that all pumps and valves work together, reducing human error and improving operational stability.

[0041] In a further preferred embodiment of the present invention, the thickening device 3 includes a settling cylinder 31, with a slurry inlet pipe 32 fixedly connected to the inlet end of the settling cylinder 31. The inlet end of the slurry inlet pipe 32 is connected to the outlet end of the first conveying pump 2. An overflow pipe 33 for discharging overflow liquid is fixedly connected to one end of the top of the settling cylinder 31. A discharge pipe 36 for discharging concentrated underflow is fixedly connected to the bottom of the settling cylinder 31. A support 34 is fixedly connected to the top of the settling cylinder 31. A stirring mechanism 35 is provided on the inner side of the support 34.

[0042] In this embodiment, the slurry enters the settling cylinder through the slurry inlet pipe 32. Under the action of gravity, the solid particles settle. The stirring mechanism 35 is driven by the drive motor 352 to make the slurry uniformly mixed and promote the action of the flocculant. The overflow liquid is discharged from the overflow pipe 33, and the concentrated underflow is discharged from the discharge pipe. The stirring mechanism 35 enhances the stirring effect through staggered impellers to prevent sedimentation. The stirring mechanism 35 prevents solid particles from caking and accelerates the settling process. The overflow liquid has a low solid content, providing high-quality feed for subsequent processes. The rigid design of the support and the stirring mechanism 35 ensures long-term operational stability.

[0043] In a further preferred embodiment of the present invention, the stirring mechanism 35 includes a stirring shaft 351 rotatably connected to the bottom of a support 34. A plurality of first stirring impellers 353 are fixedly connected to the outer side of the stirring shaft 351 and are equidistantly distributed along the axial direction of the stirring shaft 351. A drive motor 352 is fixedly connected to the top of the support 34. The output shaft of the drive motor 352 is fixedly connected to the stirring shaft 351. A connecting seat 354 is fixedly connected to the top of the stirring shaft 351. A rotating shaft 355 is rotatably connected to one end of the connecting seat 354. A plurality of second stirring impellers 356 are fixedly connected to the outer side of the rotating shaft 355 and are equidistantly distributed along the axial direction of the rotating shaft 355. The plurality of second stirring impellers 356 and the first stirring impellers 353 are alternately distributed. A transmission component 357 is provided at the top of the rotating shaft 355 to drive the rotating shaft 355 to rotate by cooperating with the start of the drive motor 352.

[0044] In this embodiment, the drive motor 352 directly drives the stirring shaft 351 to rotate, which in turn drives the first stirring impeller 353 to stir the slurry. At the same time, through the gear transmission of the transmission component 357, the rotating shaft 355 rotates in opposite or the same direction at different speeds, so that the second stirring impeller 356 and the first stirring impeller 353 move alternately to form turbulence and enhance the mixing effect. The staggered impeller design breaks the dead zone of flow in the settling cylinder, ensures uniform distribution of flocculant, improves settling efficiency, and the bidirectional stirring prevents solid particles from depositing on the cylinder wall and extends the service life of the equipment.

[0045] In a further preferred embodiment of the present invention, the transmission component 357 includes a fixed sleeve 3571 fixedly connected to the bottom of the bracket 34. The fixed sleeve 3571 is sleeved on the outside of the stirring shaft 351 and rotatably connected to the stirring shaft 351. A first gear 3572 is fixedly connected to the bottom of the fixed sleeve 3571, and a second gear 3573 is fixedly connected to the top of the rotating shaft 355. The second gear 3573 meshes with the first gear 3572, and the gear ratio of the second gear 3573 to the first gear 3572 is 2:1.

[0046] In this embodiment, when the drive motor 352 drives the stirring shaft 351 to rotate, the first gear 3572 drives the second gear 3573 through meshing, so that the rotating shaft 355 rotates at a specific speed ratio (a gear ratio of 2:1 ensures the speed difference), thereby driving the second stirring impeller 356; the gear meshing ensures the stability of the speed, avoids impeller interference, and improves the consistency of stirring.

[0047] In a further preferred embodiment of the present invention, a limiting member 359 is provided between the rotating shaft 355 and the connecting seat 354. The limiting member 359 includes a bushing 3591 fixedly connected to the rotating shaft 355. The bushing 3591 is rotatably connected to the connecting seat 354. Both ends of the bushing 3591 are fixedly connected to limiting rings 3592.

[0048] In this embodiment, the bushing 3591 is rotatably connected to the connecting seat 354, and the limiting ring 3592 is fixed at both ends of the bushing to limit the axial displacement of the rotating shaft 355 and ensure that the rotating shaft 355 remains stably aligned during rotation. This design prevents the rotating shaft 355 from shifting or vibrating, reduces mechanical wear, and extends the equipment life.

[0049] In a further preferred embodiment of the present invention, a scraper 358 is provided on the connecting seat 354. The scraper 358 includes a connecting frame 3581 fixedly connected to the end of the connecting seat 354. A slide rod 3582 that penetrates the bottom wall of the connecting frame 3581 is slidably connected to the bottom end of the connecting frame 3581. A scraper 3583 is fixedly connected to one end of the slide rod 3582. The scraper 3583 abuts against the inner wall of the settling cylinder 31. A stop block 3585 is fixedly connected to the other end of the slide rod 3582. A spring 3584 is sleeved on the outer side of the slide rod 3582. One end of the spring 3584 abuts against the scraper 3583, and the other end of the spring 3584 abuts against the connecting frame 3581.

[0050] In this embodiment, the scraper 3583 is pressed tightly against the inner wall of the settling cylinder 31 by the spring 3584. When the stirring shaft 351 rotates, the connecting frame 3581 drives the scraper 3583 to slide along the inner wall to scrape off the attached solids. The spring 3584 provides adaptive pressure to ensure that the scraper 3583 is in continuous contact with the wall surface. Automatic scraping prevents solid materials from accumulating on the inner wall, maintains heat transfer and flow efficiency, and continuous cleaning reduces the frequency of manual cleaning and improves production continuity.

[0051] A further preferred embodiment of the present invention provides a method for separating and thickening manganese sulfate slurry in an electrolytic manganese metal solution production process, comprising the following steps:

[0052] S1. Pre-concentration: The manganese sulfate slurry from the neutralization oxidation tank 1 is pumped into the thickening device 3 through the first transfer pump 2 for gravity sedimentation, while flocculant is added to obtain the upper overflow liquid and the bottom concentrated slurry.

[0053] S2, Buffering and Transport: The concentrated mud in S1 is pumped into the transfer buffer tank 5 for temporary storage via the second transport pump 4;

[0054] S3. Filtration and Washing: The concentrated slurry in the transfer buffer tank 5 is pumped into the chamber filter press 7 through the third transfer pump 6 for filtration to form filter cake and filtrate; during the filtration process, washing liquid is introduced into the chamber filter press 7 through the washing liquid supply device to wash the filter cake.

[0055] S4. Solution collection: Collect the overflow liquid generated in step S1, the filtrate generated in step S3 and the washing liquid together to obtain the thickened manganese sulfate solution.

[0056] S5. Unloading: After the filter press and washing are completed, unload the filter cake from the chamber filter press 7.

[0057] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A system for separating and thickening manganese sulfate slurry in an electrolytic manganese metal solution preparation section, comprising a neutralization oxidation tank (1) for generating the manganese sulfate slurry to be treated, characterized in that, The top of the neutralization oxidation tank (1) is connected to a first delivery pump (2) via a conduit. The outlet end of the first delivery pump (2) is connected to a thickening device (3) for gravity sedimentation separation of the slurry. The outlet end of the thickening device (3) is connected to a second delivery pump (4) via a conduit. The outlet end of the second delivery pump (4) is connected to a transfer buffer tank (5) for receiving the underflow of the thickening device (3) via a conduit. The outlet end of the transfer buffer tank (5) is connected to a third delivery pump (6) via a conduit. The outlet end of the third delivery pump (6) is connected to a chamber filter press (7) via a conduit. The washing liquid inlet of the chamber filter press (7) is connected to a washing liquid supply device.

2. The system for separating and thickening manganese sulfate slurry in the electrolytic manganese metal solution preparation section according to claim 1, characterized in that, The thickening device (3) includes a settling cylinder (31), with a slurry inlet pipe (32) fixedly connected to the inlet end of the settling cylinder (31). The inlet end of the slurry inlet pipe (32) is connected to the outlet end of the first delivery pump (2). An overflow pipe (33) for discharging overflow liquid is fixedly connected to one end of the top of the settling cylinder (31). A discharge pipe (36) for discharging concentrated underflow is fixedly connected to the bottom of the settling cylinder (31). A support (34) is fixedly connected to the top of the settling cylinder (31). A stirring mechanism (35) is provided on the inner side of the support (34).

3. The system for separating and thickening manganese sulfate slurry in the electrolytic manganese metal solution preparation section according to claim 2, characterized in that, The stirring mechanism (35) includes a stirring shaft (351) rotatably connected to the bottom of the support (34). A plurality of first stirring impellers (353) are fixedly connected to the outer side of the stirring shaft (351) and are equidistantly distributed along the axial direction of the stirring shaft (351). A drive motor (352) is fixedly connected to the top of the support (34). The output shaft of the drive motor (352) is fixedly connected to the stirring shaft (351). A connecting seat (354) is fixedly connected to the top of the stirring shaft (351). A rotating shaft (355) is rotatably connected to one end of the connecting seat (354). A plurality of second stirring impellers (356) are fixedly connected to the outer side of the rotating shaft (355) and are equidistantly distributed along the axial direction of the rotating shaft (355). The plurality of second stirring impellers (356) and first stirring impellers (353) are staggered. A transmission component (357) is provided at the top of the rotating shaft (355) to drive the rotating shaft (355) to rotate by cooperating with the start of the drive motor (352).

4. The system for separating and thickening manganese sulfate slurry in the electrolytic manganese metal solution preparation section according to claim 3, characterized in that, The transmission component (357) includes a fixed sleeve (3571) fixedly connected to the bottom of the bracket (34). The fixed sleeve (3571) is sleeved on the outside of the stirring shaft (351) and rotatably connected to the stirring shaft (351). A first gear (3572) is fixedly connected to the bottom of the fixed sleeve (3571), and a second gear (3573) is fixedly connected to the top of the rotating shaft (355). The second gear (3573) meshes with the first gear (3572).

5. The system for separating and thickening manganese sulfate slurry in the electrolytic manganese metal solution preparation section according to claim 4, characterized in that, The ratio of the number of teeth of the second gear (3573) to that of the first gear (3572) is 2:

1.

6. The system for separating and thickening manganese sulfate slurry in the electrolytic manganese metal solution preparation section according to claim 4, characterized in that, A limiting member (359) is provided between the rotating shaft (355) and the connecting seat (354). The limiting member (359) includes a bushing (3591) fixedly connected to the rotating shaft (355). The bushing (3591) is rotatably connected to the connecting seat (354). Both ends of the bushing (3591) are fixedly connected to limiting rings (3592).

7. The system for separating and thickening manganese sulfate slurry in the electrolytic manganese metal solution preparation section according to claim 4, characterized in that, The connecting seat (354) is provided with a scraper (358), the scraper (358) includes a connecting frame (3581) fixedly connected to the end of the connecting seat (354), the bottom end of the connecting frame (3581) is slidably connected with a slide rod (3582) that penetrates the bottom wall of the connecting frame (3581), one end of the slide rod (3582) is fixedly connected with a scraper (3583), the scraper (3583) abuts against the inner wall of the settling cylinder (31), and the other end of the slide rod (3582) is fixedly connected with a stop block (3585).

8. The system for separating and thickening manganese sulfate slurry in the electrolytic manganese metal solution preparation section according to claim 7, characterized in that, A spring (3584) is sleeved on the outside of the slide bar (3582). One end of the spring (3584) abuts against the scraper (3583), and the other end of the spring (3584) abuts against the connecting frame (3581).

9. The system for separating and thickening manganese sulfate slurry in the electrolytic manganese metal solution preparation section according to claim 1, characterized in that, The washing liquid supply device is used to provide washing liquid that is hot water, dilute manganese sulfate solution, or dilute washing liquid from subsequent processes.

10. The method for separating and thickening manganese sulfate slurry in the electrolytic manganese metal solution preparation section according to claim 1, characterized in that, Includes the following steps: S1, Pre-concentration: Manganese sulfate slurry from neutralization oxidation tank (1) is pumped into thickening device (3) by first transfer pump (2) for gravity sedimentation, and flocculant is added at the same time to obtain upper overflow liquid and bottom concentrated slurry; S2, Buffering and Transport: The concentrated mud in S1 is pumped into the intermediate buffer tank (5) by the second transport pump (4) for temporary storage; S3, Filtration and Washing: The concentrated mud in the transfer buffer tank (5) is pumped into the chamber filter press (7) through the third transfer pump (6) for filtration to form filter cake and filtrate; during the filtration process, washing liquid is introduced into the chamber filter press (7) through the washing liquid supply device to wash the filter cake. S4. Solution collection: Collect the overflow liquid generated in step S1, the filtrate generated in step S3 and the washing liquid together to obtain the thickened manganese sulfate solution. S5. Unloading: After the filter press and washing are completed, unload the filter cake from the chamber filter press (7).

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