Manganese acid leaching residue recovery system

Abstract

The utility model discloses a manganese acid leaching residue recovery system, which relates to the technical field of manganese acid leaching residue recovery, and comprises a first washing filter press, a first washing electrolysis device, a pickling device, a second washing filter press, a second washing electrolysis device, a washing device and a third washing filter press, the first washing filter press can perform solid-liquid separation on ore pulp materials to form first washing liquid and first washing press filter residues; the first-washing electrolysis device can electrolyze the first-washing liquid to form a first-washing electrolytic manganese product and a first-washing post-electrolysis liquid; an acid solution can be introduced into the acid pickling device so as to wash the first washing and pressing filter residues to form acid pickling slurry; the secondary washing filter press can be used for carrying out solid-liquid separation on the acid washing slurry to form secondary washing liquid and secondary washing press filter residues; the secondary washing electrolysis device can electrolyze secondary washing liquid to form a secondary washing electrolytic manganese product and secondary washing post-electrolysis liquid; industrial water can be introduced into the washing device so as to wash the secondary washing pressure filter residues to form washing slurry; the third-washing filter press can be used for carrying out solid-liquid separation on the washing slurry to form third-washing liquid and third-washing press filter residues.

Description

Technical Field

[0001] This utility model relates to the field of manganese acid leaching residue recovery technology, and in particular to a manganese acid leaching residue recovery system. Background Technology

[0002] The existing manganese acid leaching residue washing process usually involves acid-leaching the manganese ore slurry, then filtering it once through a filter press to achieve solid-liquid separation, forming a manganese-containing precious liquor and filter residue. The manganese-containing precious liquor then enters the electrolysis process to produce electrolytic manganese, while the filter residue is directly discharged.

[0003] Although the above process is simple, directly discharging the filter residue has two obvious drawbacks. First, it results in the loss of a large amount of metallic manganese and other valuable elements: because the filter residue is not washed, about 4% of the metallic manganese is discarded along with the filter residue, and a considerable amount of copper, zinc, silver, etc. are not recovered, thus causing a great waste of resources. Second, it causes environmental pollution: the metallic elements and acidic substances in the filter residue are all harmful substances that are easily leached out by rainwater. Once this filter residue is discharged, it will cause great pollution to water bodies and soil, seriously harming the environment. Utility Model Content

[0004] The purpose of this invention is to provide a manganese acid leaching residue recovery system to solve the problems existing in the above-mentioned related technologies. It can effectively recover the main element manganese in the slurry material and achieve the standard discharge of waste residue, thereby reducing environmental pollution.

[0005] To achieve the above objectives, this utility model provides the following solution:

[0006] This utility model provides a manganese acid leaching residue recovery system, including a first-wash filter press, a first-wash electrolysis device, an acid washing device, a second-wash filter press, a second-wash electrolysis device, a water washing device, and a third-wash filter press. The feed inlet of the first-wash filter press is used to introduce slurry material, and the first-wash filter press can perform solid-liquid separation on the slurry material to form a first-wash liquid and a first-wash filter residue. The feed inlet of the first-wash electrolysis device is connected to the liquid phase outlet of the first-wash filter press, and the first-wash electrolysis device can electrolyze the first-wash liquid to form a first-wash electrolytic manganese product and a first-wash electrolytic post-liquid.

[0007] The feed inlet of the pickling device is connected to the solid phase outlet of the first-wash filter press, and an acidic solution can be introduced into the pickling device to wash the first-wash filter residue to form a pickling slurry; the feed inlet of the second-wash filter press is connected to the discharge outlet of the pickling device, and the second-wash filter press can perform solid-liquid separation on the pickling slurry to form a second-wash liquid and a second-wash filter residue; the feed inlet of the second-wash electrolysis device is connected to the liquid phase outlet of the second-wash filter press, and the second-wash electrolysis device can electrolyze the second-wash liquid to form a second-wash electrolytic manganese product and a second-wash electrolytic post-liquid;

[0008] The inlet of the washing device is connected to the solid phase outlet of the second washing filter press. Industrial water can be introduced into the washing device to wash the second washing filter residue to form a washing slurry. The inlet of the third washing filter press is connected to the outlet of the washing device. The third washing filter press can perform solid-liquid separation on the washing slurry to form a third washing liquid and a third washing filter residue.

[0009] The pickling device is also provided with a pickling slurry preparation port, which is connected to the outlet of the electrolyzed liquid of the second washing electrolysis device and the liquid phase outlet of the third washing filter press; the water washing device is also provided with a water washing slurry preparation port, which is connected to the liquid phase outlet of the third washing filter press.

[0010] Preferably, the pickling device includes a pickling slag remover and a pickling slurry preparation tank. The feed inlet of the pickling slag remover is connected to the solid phase outlet of the first-wash filter press. The washing liquid inlet of the pickling slag remover is used to introduce the acidic solution. The discharge outlet of the pickling slag remover is connected to the feed inlet of the pickling slurry preparation tank. The discharge outlet of the pickling slurry preparation tank is connected to the feed inlet of the second-wash filter press. The slurry preparation liquid inlet of the pickling slag remover is connected to the electrolyzed liquid outlet of the second-wash electrolysis device and the liquid phase outlet of the third-wash filter press.

[0011] Preferably, the washing device includes a slag washing machine and a slurry washing tank. The inlet of the slag washing machine is connected to the solid phase outlet of the second washing filter press. The washing liquid inlet of the slag washing machine is used to introduce the industrial water. The outlet of the slag washing machine is connected to the inlet of the slurry washing tank. The outlet of the slurry washing tank is connected to the inlet of the third washing filter press. The slurry inlet of the slag washing machine is connected to the liquid phase outlet of the third washing filter press.

[0012] Preferably, both the acid pickling slag remover and the water washing slag remover are stirring type slag removers.

[0013] Preferably, the washing electrolysis device includes a washing electrolysis cell, the inlet of the washing electrolysis cell is connected to the liquid phase outlet of the washing filter press, the cathode outlet of the washing electrolysis cell is used to discharge the washing electrolytic manganese product, and the anode outlet of the washing electrolysis cell is used to discharge the washing electrolytic liquid.

[0014] Preferably, the secondary washing electrolysis device includes a secondary washing electrolysis cell, the inlet of which is connected to the liquid phase outlet of the secondary washing filter press, the cathode outlet of which is used to discharge the secondary washing electrolytic manganese product, the anode outlet of which is used to discharge the secondary washing electrolytic liquid, and the anode outlet of which is connected to the acid washing slurry preparation port of the acid washing device.

[0015] Preferably, the first-wash filter press, the second-wash filter press, and the third-wash filter press are all plate and frame filter presses.

[0016] Preferably, the liquid phase outlet of the first washing filter press is connected to the feed inlet of the first washing electrolysis device through a washing liquid conveying pipeline, and a washing liquid sedimentation tank is provided on the first washing liquid conveying pipeline.

[0017] Preferably, the liquid phase outlet of the secondary washing filter press is connected to the feed inlet of the secondary washing electrolysis device through a secondary washing liquid conveying pipeline, and a secondary washing liquid sedimentation tank is provided on the secondary washing liquid conveying pipeline.

[0018] Preferably, the liquid phase outlet of the three-wash filter press is connected to the acid washing slurry preparation port of the acid washing device via the three-wash liquid conveying main pipe, and a three-wash liquid sedimentation tank is provided on the three-wash liquid conveying main pipe; a three-wash liquid conveying branch pipe and a two-wash electrolytic liquid conveying pipeline are also connected to the three-wash liquid conveying main pipe at a position behind the three-wash liquid sedimentation tank, wherein the end of the three-wash liquid conveying branch pipe away from the three-wash liquid conveying main pipe is connected to the water washing slurry preparation port of the water washing device, and the end of the two-wash electrolytic liquid conveying pipeline away from the three-wash liquid conveying main pipe is connected to the electrolytic liquid outlet of the two-wash electrolysis device, and a two-wash electrolytic liquid sedimentation tank is provided on the two-wash electrolytic liquid conveying pipeline.

[0019] This utility model achieves the following technical advantages compared to related technologies:

[0020] The manganese acid leaching residue recovery system provided by this utility model includes a first-wash filter press, a first-wash electrolysis device, an acid washing device, a second-wash filter press, a second-wash electrolysis device, a water washing device, and a third-wash filter press. In use, the slurry material (i.e., the slurry material after acid leaching of manganese ore) is fed into the first-wash filter press, where solid-liquid separation is performed to form a first-wash liquid and a first-wash filter residue. The first-wash liquid enters the first-wash electrolysis device, where it is electrolyzed to form a first-wash electrolytic manganese product and a first-wash electrolytic post-liquid, thus realizing the conventional electrolytic recovery of the first-wash liquid.

[0021] The first-wash filter press residue enters the acid washing unit for acidic solution washing to form acid washing slurry, which washes out the main element manganese that has been leached but not washed out in the first-wash filter press residue. Then, the acid washing slurry enters the second-wash filter press, where solid-liquid separation is carried out to form second-wash liquid and second-wash filter press residue. The second-wash liquid enters the second-wash electrolysis unit, where it is electrolyzed to form second-wash electrolytic manganese product and second-wash electrolytic post-liquid, thus achieving effective recovery of the main element manganese in the second-wash liquid.

[0022] The filter residue from the second washing press enters the water washing unit for washing with clean water to form a washed slurry. This process washes away the residual acidic solution in the filter residue, bringing the washed slurry to or near neutrality. Simultaneously, it washes out valuable metals and harmful elements leached from the filter residue. Then, the washed slurry enters the third washing filter press, where solid-liquid separation occurs, forming a third washing liquid and a third washing filter residue. The third washing filter residue is discharged as waste. Furthermore, in the above process, the electrolyzed liquid from the second washing press is returned to the acid washing unit for slurry preparation, and the third washing liquid is returned to both the acid washing and water washing units for slurry preparation. This achieves compliant waste discharge and reduces environmental pollution. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or related technologies, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 A schematic diagram of a manganese acid leaching residue recovery system provided in an embodiment of this utility model.

[0025] In the diagram: 1-First washing filter press, 2-First washing electrolysis unit, 3-Second washing filter press, 4-Second washing electrolysis unit, 5-Third washing filter press, 6-Acid washing slag remover, 7-Acid washing slurry preparation tank, 8-Water washing slag remover, 9-Water washing slurry preparation tank, 10-First washing liquid sedimentation tank, 11-Second washing liquid sedimentation tank, 12-Third washing liquid sedimentation tank, 13-Second washing electrolysis liquid sedimentation tank. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] The purpose of this invention is to provide a manganese acid leaching residue recovery system to solve the problems existing in related technologies. It can effectively recover the main element manganese in mineral slurry materials and achieve the standard discharge of waste residue, thereby reducing environmental pollution.

[0028] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] like Figure 1As shown, this embodiment provides a manganese acid leaching residue recovery system, including a first-wash filter press 1, a first-wash electrolysis device 2, an acid washing device, a second-wash filter press 3, a second-wash electrolysis device 4, a water washing device, and a third-wash filter press 5. The feed inlet of the first-wash filter press 1 is used to introduce slurry material. The first-wash filter press 1 can perform solid-liquid separation on the slurry material to form first-wash liquid and first-wash filter residue. The feed inlet of the first-wash electrolysis device 2 is connected to the liquid phase outlet of the first-wash filter press 1. The first-wash electrolysis device 2 can electrolyze the first-wash liquid to form first-wash electrolytic manganese product and first-wash electrolytic post-liquid, realizing the conventional electrolytic recovery of the first-wash liquid.

[0030] In this embodiment, the feed inlet of the pickling device is connected to the solid phase outlet of the first-wash filter press 1. An acidic solution can be introduced into the pickling device to wash the first-wash filter residue to form a pickling slurry. The purpose is to wash out the main element manganese that has been leached but not washed out in the first-wash filter residue. The feed inlet of the second-wash filter press 3 is connected to the discharge outlet of the pickling device. The second-wash filter press 3 can perform solid-liquid separation on the pickling slurry to form a second-wash liquid and a second-wash filter residue. The manganese content in the second-wash filter residue after filtration is no more than 1%. The feed inlet of the second-wash electrolysis device 4 is connected to the liquid phase outlet of the second-wash filter press 3. The second-wash electrolysis device 4 can electrolyze the second-wash liquid to form a second-wash electrolytic manganese product and a second-wash electrolytic liquid, realizing the effective recovery of the main element manganese in the second-wash liquid.

[0031] In this embodiment, the inlet of the washing device is connected to the solid phase outlet of the secondary washing filter press 3. Industrial water can be introduced into the washing device to wash the secondary washing filter residue to form a washing slurry. The purpose is to wash away the residual acidic solution in the secondary washing filter residue, so that the washing slurry reaches or approaches neutrality. At the same time, valuable metals and harmful elements leached from the secondary washing filter residue are washed out. The inlet of the tertiary washing filter press 5 is connected to the outlet of the washing device. The tertiary washing filter press 5 can perform solid-liquid separation on the washing slurry to form a tertiary washing liquid and a tertiary washing filter residue. The tertiary washing filter residue is discharged as waste residue, achieving the standard discharge of waste residue and reducing environmental pollution.

[0032] In this embodiment, the pickling device is also provided with a pickling slurry preparation port, which is connected to the outlet of the electrolyzed liquid of the second washing electrolysis device 4 and the liquid phase outlet of the third washing filter press 5; the water washing device is also provided with a water washing slurry preparation port, which is connected to the liquid phase outlet of the third washing filter press 5, that is, the electrolyzed liquid of the second washing is returned to the pickling device for slurry preparation, and the third washing liquid is returned to the pickling device and the water washing device for slurry preparation.

[0033] In this embodiment, the pickling device includes a pickling slag remover 6 and a pickling slurry preparation tank 7. The feed inlet of the pickling slag remover 6 is connected to the solid phase outlet of the first washing filter press 1. The washing liquid inlet of the pickling slag remover 6 is used to introduce an acidic solution. In this embodiment, the acidic solution is preferably 2%-10% dilute sulfuric acid. The discharge outlet of the pickling slag remover 6 is connected to the feed inlet of the pickling slurry preparation tank 7. The discharge outlet of the pickling slurry preparation tank 7 is connected to the feed inlet of the second washing filter press 3. The slurry preparation liquid inlet of the pickling slag remover 6 is connected to the electrolyzed liquid outlet of the second washing electrolysis device 4 and the liquid phase outlet of the third washing filter press 5. Specifically, the second washing electrolyzed liquid exiting from the electrolyzed liquid outlet of the second washing electrolysis device 4 returns to the pickling slag remover 6. At the same time, the third washing liquid exiting from the liquid phase outlet of the third washing filter press 5 returns to the pickling slag remover 6, so that the liquid-solid ratio in the pickling slurry preparation tank 7 is 2-6:1.

[0034] In this embodiment, the washing device includes a washing slag remover 8 and a washing slurry preparation tank 9. The inlet of the washing slag remover 8 is connected to the solid phase outlet of the secondary washing filter press 3. The washing liquid inlet of the washing slag remover 8 is used to introduce industrial water. The outlet of the washing slag remover 8 is connected to the inlet of the washing slurry preparation tank 9. The outlet of the washing slurry preparation tank 9 is connected to the inlet of the tertiary washing filter press 5. The slurry preparation liquid inlet of the washing slag remover 8 is connected to the liquid phase outlet of the tertiary washing filter press 5. Specifically, the tertiary washing liquid exiting from the liquid phase outlet of the tertiary washing filter press 5 is returned to the washing slag remover 8 so that the liquid-solid ratio in the washing slurry preparation tank 9 is 2-6:1.

[0035] In this embodiment, both the acid pickling slag remover 6 and the water washing slag remover 8 are agitated slag removers.

[0036] In this embodiment, the washing electrolysis device 2 includes a washing electrolysis cell. The feed inlet of the washing electrolysis cell is connected to the liquid phase outlet of the washing filter press 1. The cathode outlet of the washing electrolysis cell is used to discharge the washing electrolytic manganese product, and the anode outlet of the washing electrolysis cell is used to discharge the washing electrolytic liquid.

[0037] In this embodiment, the secondary washing electrolysis device 4 includes a secondary washing electrolysis cell. The feed inlet of the secondary washing electrolysis cell is connected to the liquid phase outlet of the secondary washing filter press 3. The cathode outlet of the secondary washing electrolysis cell is used to discharge the secondary washing electrolytic manganese product. The anode outlet of the secondary washing electrolysis cell is used to discharge the secondary washing electrolytic liquid. The anode outlet of the secondary washing electrolysis cell is connected to the acid washing slurry preparation port of the acid washing device.

[0038] In this embodiment, the first-wash filter press 1, the second-wash filter press 3, and the third-wash filter press 5 are all plate and frame filter presses.

[0039] In this embodiment, the liquid phase outlet of the first washing filter press 1 is connected to the feed inlet of the first washing electrolysis device 2 through a washing liquid conveying pipeline, and a washing liquid sedimentation tank 10 is provided on the washing liquid conveying pipeline.

[0040] In this embodiment, the liquid phase outlet of the secondary washing filter press 3 is connected to the feed inlet of the secondary washing electrolysis device 4 through the secondary washing liquid conveying pipeline, and a secondary washing liquid sedimentation tank 11 is provided on the secondary washing liquid conveying pipeline.

[0041] In this embodiment, the liquid phase outlet of the three-wash filter press 5 is connected to the acid washing slurry preparation port of the acid washing device through the three-wash liquid conveying main pipe, and a three-wash liquid sedimentation tank 12 is provided on the three-wash liquid conveying main pipe; a three-wash liquid conveying branch pipe and a two-wash electrolytic liquid conveying pipeline are also connected to the three-wash liquid conveying main pipe at a position behind the three-wash liquid sedimentation tank 12. The end of the three-wash liquid conveying branch pipe away from the three-wash liquid conveying main pipe is connected to the water washing slurry preparation port of the water washing device, and the end of the two-wash electrolytic liquid conveying pipeline away from the three-wash liquid conveying main pipe is connected to the electrolytic liquid outlet of the two-wash electrolysis device 4, and a two-wash electrolytic liquid sedimentation tank 13 is provided on the two-wash electrolytic liquid conveying pipeline.

[0042] The working process of the manganese acid leaching residue recovery system provided in this embodiment is as follows:

[0043] In use, the slurry material (i.e., the slurry material after acid leaching of manganese ore) is fed into the first washing filter press 1. The first washing filter press 1 separates the solid and liquid to form the first washing liquid and the first washing filter residue. The first washing liquid enters the first washing liquid sedimentation tank 10 through the first washing liquid conveying pipeline for buffering and sedimentation, and then enters the first washing electrolysis device 2. The first washing liquid is electrolyzed by the first washing electrolysis device 2 to form the first washing electrolytic manganese product and the first washing electrolysis post-liquid, realizing the conventional electrolytic recovery of the first washing liquid.

[0044] The first-wash filter press residue is sequentially washed with acidic solution in an acid washing slag remover 6 and an acid washing slurry tank 7 to form acid washing slurry, which washes out the main element manganese that has leached out but not been washed out in the first-wash filter press residue. Then, the acid washing slurry enters the second-wash filter press 3, where solid-liquid separation is performed to form second-wash liquid and second-wash filter press residue. The second-wash liquid enters the second-wash liquid sedimentation tank 11 through the second-wash liquid conveying pipeline for buffer sedimentation, and then enters the second-wash electrolysis device 4. The second-wash electrolysis device 4 electrolyzes the second-wash liquid to form second-wash electrolytic manganese product and second-wash electrolytic post-liquid, thus realizing the effective recovery of the main element manganese in the second-wash liquid.

[0045] The second-wash filter press residue is sequentially washed with clean water through a water washing slag remover 8 and a water washing slurry preparation tank 9 to form a washed slurry. This process washes away any residual acidic solution in the second-wash filter press residue, bringing the washed slurry to or near neutrality. Simultaneously, it washes away valuable metals and hazardous elements leached from the second-wash filter press residue. Then, the washed slurry enters a third-wash filter press 5, where solid-liquid separation occurs, forming a third-wash liquid and a third-wash filter press residue. The third-wash filter press residue is discharged as waste. In the above process, the second-wash electrolytic liquid is transported through a second-wash electrolytic liquid conveying pipeline to a second-wash electrolytic liquid sedimentation tank 13 for buffering and sedimentation, and then returned to the acid washing unit for slurry preparation. The third-wash liquid is transported through a third-wash liquid conveying main pipe to a third-wash liquid sedimentation tank 12 for buffering and sedimentation, and then returned to the acid washing unit and the water washing unit for slurry preparation via the third-wash liquid conveying main pipe and third-wash liquid conveying branch pipe, respectively. This achieves compliant discharge of waste residue and reduces environmental pollution.

[0046] This system has the following advantages:

[0047] First, it has achieved the standard discharge of waste residue, minimizing environmental pollution to the greatest extent possible.

[0048] Secondly, it achieves effective recovery of the main element manganese, and through the second washing electrolysis unit 4, the manganese in the slag directly generates economic benefits.

[0049] Third, it enables the comprehensive recycling of other valuable elements, turning waste into treasure, making full use of resources, and achieving the goal of comprehensive resource utilization.

[0050] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A manganese acid leaching residue recovery system, characterized in that: The system includes a first-wash filter press, a first-wash electrolysis unit, an acid washing unit, a second-wash filter press, a second-wash electrolysis unit, a water washing unit, and a third-wash filter press. The feed inlet of the first-wash filter press is used to introduce slurry material, and the first-wash filter press can perform solid-liquid separation on the slurry material to form a first-wash liquid and a first-wash filter residue. The feed inlet of the first-wash electrolysis unit is connected to the liquid phase outlet of the first-wash filter press, and the first-wash electrolysis unit can electrolyze the first-wash liquid to form a first-wash electrolytic manganese product and a first-wash electrolytic post-liquid. The feed inlet of the pickling device is connected to the solid phase outlet of the first-wash filter press, and an acidic solution can be introduced into the pickling device to wash the first-wash filter residue to form a pickling slurry; the feed inlet of the second-wash filter press is connected to the discharge outlet of the pickling device, and the second-wash filter press can perform solid-liquid separation on the pickling slurry to form a second-wash liquid and a second-wash filter residue; the feed inlet of the second-wash electrolysis device is connected to the liquid phase outlet of the second-wash filter press, and the second-wash electrolysis device can electrolyze the second-wash liquid to form a second-wash electrolytic manganese product and a second-wash electrolytic post-liquid; The inlet of the washing device is connected to the solid phase outlet of the second washing filter press. Industrial water can be introduced into the washing device to wash the second washing filter residue to form a washing slurry. The inlet of the third washing filter press is connected to the outlet of the washing device. The third washing filter press can perform solid-liquid separation on the washing slurry to form a third washing liquid and a third washing filter residue. The pickling device is also provided with a pickling slurry preparation port, which is connected to the outlet of the electrolyzed liquid of the second washing electrolysis device and the liquid phase outlet of the third washing filter press; the water washing device is also provided with a water washing slurry preparation port, which is connected to the liquid phase outlet of the third washing filter press.

2. The manganese acid leaching residue recovery system according to claim 1, characterized in that: The pickling device includes a pickling slag remover and a pickling slurry preparation tank. The feed inlet of the pickling slag remover is connected to the solid phase outlet of the first-wash filter press. The washing liquid inlet of the pickling slag remover is used to introduce the acidic solution. The discharge outlet of the pickling slag remover is connected to the feed inlet of the pickling slurry preparation tank. The discharge outlet of the pickling slurry preparation tank is connected to the feed inlet of the second-wash filter press. The slurry preparation liquid inlet of the pickling slag remover is connected to the electrolyzed liquid outlet of the second-wash electrolysis device and the liquid phase outlet of the third-wash filter press.

3. The manganese acid leaching residue recovery system according to claim 2, characterized in that: The washing device includes a slag washing machine and a slurry washing tank. The inlet of the slag washing machine is connected to the solid phase outlet of the second washing filter press. The washing liquid inlet of the slag washing machine is used to introduce the industrial water. The outlet of the slag washing machine is connected to the inlet of the slurry washing tank. The outlet of the slurry washing tank is connected to the inlet of the third washing filter press. The slurry inlet of the slag washing machine is connected to the liquid phase outlet of the third washing filter press.

4. The manganese acid leaching residue recovery system according to claim 3, characterized in that: Both the acid pickling slag remover and the water washing slag remover are agitated slag removers.

5. The manganese acid leaching residue recovery system according to claim 1, characterized in that: The washing electrolysis device includes a washing electrolysis cell, the inlet of which is connected to the liquid phase outlet of the washing filter press, the cathode outlet of which is used to discharge the washing electrolytic manganese product, and the anode outlet of which is used to discharge the washing electrolytic liquid.

6. The manganese acid leaching residue recovery system according to claim 1, characterized in that: The secondary washing electrolysis device includes a secondary washing electrolysis cell. The inlet of the secondary washing electrolysis cell is connected to the liquid phase outlet of the secondary washing filter press. The cathode outlet of the secondary washing electrolysis cell is used to discharge the secondary washing electrolytic manganese product. The anode outlet of the secondary washing electrolysis cell is used to discharge the secondary washing electrolyzed liquid. The anode outlet of the secondary washing electrolysis cell is connected to the acid washing slurry preparation port of the acid washing device.

7. The manganese acid leaching residue recovery system according to claim 1, characterized in that: The first-wash filter press, the second-wash filter press, and the third-wash filter press are all plate and frame filter presses.

8. The manganese acid leaching residue recovery system according to claim 1, characterized in that: The liquid phase outlet of the first washing filter press is connected to the feed inlet of the first washing electrolysis device through a washing liquid conveying pipeline, and a washing liquid sedimentation tank is provided on the washing liquid conveying pipeline.

9. The manganese acid leaching residue recovery system according to claim 1, characterized in that: The liquid phase outlet of the secondary washing filter press is connected to the feed inlet of the secondary washing electrolysis device through a secondary washing liquid conveying pipeline, and a secondary washing liquid sedimentation tank is provided on the secondary washing liquid conveying pipeline.

10. The manganese acid leaching residue recovery system according to claim 1, characterized in that: The liquid phase outlet of the three-wash filter press is connected to the acid washing slurry preparation port of the acid washing device through the main three-wash liquid conveying pipe, and a three-wash liquid sedimentation tank is provided on the main three-wash liquid conveying pipe; a three-wash liquid conveying branch pipe and a two-wash electrolytic liquid conveying pipeline are also connected to the main three-wash liquid conveying pipe located behind the three-wash liquid sedimentation tank. The end of the three-wash liquid conveying branch pipe away from the main three-wash liquid conveying pipe is connected to the water washing slurry preparation port of the water washing device, and the end of the two-wash electrolytic liquid conveying pipeline away from the main three-wash liquid conveying pipe is connected to the electrolytic liquid outlet of the two-wash electrolysis device, and a two-wash electrolytic liquid sedimentation tank is provided on the two-wash electrolytic liquid conveying pipeline.

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