Device and method for recycling residual manganese resources in electrolytic manganese residues

Abstract

The invention relates to the technical field of solid waste resourceful treatment, in particular to a device and method for recycling residual manganese resources in electrolytic manganese residues, the device comprises a magnetic separation rack, the magnetic separation rack is provided with a magnetic separation cavity, and a magnetic separation roller assembly is installed in the magnetic separation cavity; the power assembly is mounted on the magnetic separation rack, and the output end of the power assembly is connected with the magnetic separation roller assembly; and the magnetic material separation assembly is installed on the side wall of the magnetic separation cavity and used for separating the magnetic materials on the magnetic separation roller assembly. The method is favorable for recycling manganese resources in the electrolytic manganese residues.

Description

Technical Field

[0001] This invention relates to the field of solid waste resource utilization technology, and in particular to an apparatus and method for recovering residual manganese resources from electrolytic manganese slag. Background Technology

[0002] Electrolytic manganese slag is a solid waste generated during the production of metallic manganese, after treatment processes such as sulfuric acid leaching and neutralization. my country is the world's largest producer of electrolytic metallic manganese, accounting for approximately 98.5% of global production annually. Statistics show that for every ton of electrolytic metallic manganese produced, about 10 to 12 tons of electrolytic manganese slag are generated. Currently, the cumulative stockpile of electrolytic manganese slag in my country exceeds 160 million tons and continues to grow at a rate of approximately 10 million tons per year. The current primary method of storage is in slag storage facilities, which results in the occupation of land resources and poses serious environmental pollution risks.

[0003] During long-term storage, harmful ions such as manganese, ammonium, and nitrogen in electrolytic manganese slag can easily seep into groundwater with rainwater, posing a potential threat to ecosystems and human health. To effectively control pollution risks, my country has clearly required the electrolytic manganese industry to promote the reduction, harmlessness, and resource utilization of manganese slag through a combined approach of "source control, process regulation, and end-of-pipe treatment." However, the resource-based treatment of electrolytic manganese slag still faces problems such as low residual manganese recovery efficiency, high processing temperature, high energy consumption, and low tailings utilization rate.

[0004] Therefore, those skilled in the art are dedicated to developing an apparatus and method for recovering residual manganese resources from electrolytic manganese slag, which is beneficial for recovering manganese resources from electrolytic manganese slag. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide an apparatus and method for recovering residual manganese resources in electrolytic manganese slag, which is beneficial for recovering manganese resources in electrolytic manganese slag.

[0006] The technical solution of the present invention to solve the above-mentioned technical problems is as follows:

[0007] An apparatus for recovering residual manganese resources from electrolytic manganese slag, comprising:

[0008] A magnetic separator frame, wherein the magnetic separator frame has a magnetic separation chamber, and a magnetic separation drum assembly is installed inside the magnetic separation chamber;

[0009] A power assembly is mounted on the magnetic separator frame, and the output end of the power assembly is connected to the magnetic separator drum assembly;

[0010] A magnetic material separation assembly is installed on the side wall of the magnetic separation chamber and is used to separate the magnetic material on the magnetic separation drum assembly.

[0011] The beneficial effects of the above scheme are as follows: Through the magnetic separator frame, magnetic separator drum assembly, power unit, and magnetic material separation assembly, effective separation and recovery of magnetic manganese resources from electrolytic manganese slag are achieved. The magnetic separator drum assembly is installed inside the magnetic separation chamber and is driven to rotate by the power unit. During the magnetic separation process, magnetic manganese particles in the manganese slag are adsorbed onto the magnetic separator drum under the action of the magnetic field. As the drum rotates, they are separated from non-magnetic impurities. Then, the magnetic material separation assembly separates the adsorbed magnetic material, completing the initial enrichment of manganese resources. This facilitates further processing and recycling, improves the recovery rate of manganese resources, and reduces the amount of manganese slag stockpiled, thus reducing the occupation of land resources and the risk of environmental pollution.

[0012] Based on the above technical solution, the present invention can be further improved as follows.

[0013] Furthermore, the magnetic separation drum assembly includes a magnetic separation drum, and an electromagnetic coil is installed inside the magnetic separation drum. The electromagnetic coil is electrically connected to the control component.

[0014] A rotating shaft is connected to the middle of the magnetic separator drum. The rotating shaft extends out of the magnetic separator chamber and is mounted on the magnetic separator frame via a shaft support.

[0015] The beneficial effects of adopting the above-mentioned further solution are: installing an electromagnetic coil inside the magnetic separator drum and electrically connecting it to the control components allows for flexible adjustment of the magnetic field strength generated by the electromagnetic coil according to actual processing needs, thereby adapting to electrolytic manganese slag with different manganese contents and magnetic properties, and improving the accuracy and efficiency of magnetic separation.

[0016] Furthermore, the power assembly includes a power motor, which is mounted on the magnetic separator frame and has a speed reducer connected to its output end. The output end of the speed reducer is connected to the input end of the magnetic separator roller assembly.

[0017] The beneficial effects of adopting the above-mentioned further solution are: by cooperating with the power motor and the reducer, the high-speed rotation of the motor is reduced to the appropriate speed required by the magnetic separation drum assembly, ensuring that the magnetic separation drum can operate at the optimal speed during the magnetic separation process, so that the magnetic material on the surface of the magnetic separation drum can fully interact with the magnetic field and achieve effective separation.

[0018] Furthermore, the magnetic material separation assembly includes a separation chamber, in which a receiving plate is installed. The receiving plate is inclined and its end is close to the magnetic separation drum assembly and located below the rotation axis of the magnetic separation drum assembly.

[0019] The separation chamber is also equipped with a rinsing pipe, which has rinsing holes facing the magnetic separation roller assembly to rinse the magnetic material on the surface of the magnetic separation roller assembly and drop it onto the receiving plate.

[0020] The beneficial effects of adopting the above-mentioned further solution are as follows: when the magnetic separator drum rotates and carries the magnetic material to a certain position, the water sprayed from the flushing pipe flows through the flushing hole toward the magnetic separator drum assembly, flushing the magnetic material off and causing it to fall onto the inclined receiving plate. The material then slides down the receiving plate to the designated collection area, realizing the rapid and thorough separation of the magnetic material from the magnetic separator drum, avoiding the residue of the magnetic material on the drum, and ensuring the continuity and efficiency of the magnetic separation process.

[0021] Furthermore, a feed hopper is also installed on the magnetic separator frame, the feed hopper is connected to the magnetic separation chamber, and a filter plate is installed inside the feed hopper.

[0022] The beneficial effects of adopting the above-mentioned further scheme are: the feed hopper allows the electrolytic manganese slag slurry to enter the magnetic separation chamber evenly and stably, the filter plate can perform preliminary filtration and homogenization of the slurry, remove larger impurities or agglomerates, prevent blockage of the magnetic separation chamber or affect the normal operation of the magnetic separation drum, ensure that the manganese particles in the slurry can better contact the magnetic field, and improve the magnetic separation efficiency and recovery effect.

[0023] Furthermore, the magnetic separator drum is wrapped with an anti-wear film, and multiple electromagnets are evenly installed inside the magnetic separator drum. Each electromagnet is connected to a conductive slip ring via a connecting wire, and the connecting wire is installed inside the rotating shaft. An angle sensor is connected to the end of the rotating shaft, and the angle sensor and the multiple conductive slip rings are electrically connected to a control component.

[0024] The upper side of the magnetic separator is a strong magnetic zone, and the lower side of the magnetic separator is a weak magnetic zone. When the magnetic separator rotates from the weak magnetic zone to the strong magnetic zone along the rotation direction, the current flowing into the electromagnet gradually increases.

[0025] The flushing tube is located above the strong magnetic area.

[0026] The beneficial effects of adopting the above-mentioned further solution are as follows: A common magnetic separator drum has a uniformly distributed magnetic field, which adsorbs magnetic materials such as manganese during the magnetic separation process. If the electrolytic manganese slag contains a high amount of magnetic material, a large amount of magnetic material will immediately adhere to the magnetic separator drum near the feed hopper, causing jamming during drum rotation. Simultaneously, the distance between the bottom of the magnetic separation chamber and the outer edge of the magnetic separator drum should be as small as possible to ensure sufficient magnetic field strength at the bottom of the chamber. However, if the distance is too small, the magnetic material adsorbed on the drum will experience jamming or strong friction with the bottom of the chamber during drum rotation.

[0027] In this application, the area below the magnetic separator drum and near the bottom of the magnetic separation chamber is the weak magnetic zone, while the highest point on the upper side of the magnetic separator drum is the strong magnetic zone. When the electromagnet is in the weak magnetic zone, the control component controls the current supplied to the electromagnet to be as small as possible according to the signal transmitted by the angle sensor, thereby achieving weak magnetic field. When the electromagnet is in the strong magnetic zone, the control component controls the current supplied to the electromagnet to be as large as possible, thereby achieving strong magnetic field. When the electromagnet rotates from the weak magnetic zone to the strong magnetic zone, the current supplied to the electromagnet by the control component gradually increases, forming a gradual magnetic field.

[0028] When the electrolytic manganese slag enters from the medium magnetic zone and comes into contact with the anti-wear film on the outer surface of the magnetic separator, some of the electrolytic manganese slag will be adsorbed by the medium magnetic zone. Since the upper part is the strong magnetic zone, the electrolytic manganese slag will overcome gravity and move towards the strong magnetic zone under the action of the strong magnetic field force, thus avoiding a large amount of electrolytic manganese slag from accumulating in the same area. The weak magnetic zone is used to adsorb the remaining electrolytic manganese slag. The gradually changing magnetic field is used to evenly adsorb the electrolytic manganese slag and avoid agglomeration. When the electrolytic manganese slag is transported to the second half of the strong magnetic zone, high-pressure flushing water will wash the electrolytic manganese slag into the separation chamber.

[0029] A method for recovering residual manganese resources from electrolytic manganese slag, applied to the apparatus for recovering residual manganese resources from electrolytic manganese slag as described above, includes the following steps:

[0030] S100. Prepare a slurry with an electrolytic manganese slag mass fraction of 25% to 35% by mixing electrolytic manganese slag with water;

[0031] S200. The slurry prepared in step S100 is passed into a device for recovering residual manganese resources in electrolytic manganese slag to separate manganese-rich concentrate and tailings.

[0032] S300. The manganese-rich concentrate separated in step S200 is mixed with sulfuric acid and reacted to obtain leaching solution and leaching residue;

[0033] S400. Mix the tailings obtained in step S200 and the leaching residue obtained in step S300, add sulfuric acid, and stir evenly to obtain an acidified mixture;

[0034] S500. The acidified mixture from step S400 is placed in a roasting furnace and roasted to obtain a roasted product. The roasted product is mixed with pure water, stirred and leached to obtain a manganese sulfate solution.

[0035] S600. The manganese sulfate solution from step S500 is filtered to separate the solution and filter residue. The filter residue is washed until neutral and then discharged into the slag bin.

[0036] The beneficial effects of adopting the above-mentioned further scheme are as follows: through the reasonable and orderly connection and synergistic effect between each step, not only is the recovery rate of manganese resources improved, but the electrolytic manganese slag, which was originally a waste, can also be transformed into valuable products such as manganese sulfate solution, realizing the recycling of resources, reducing dependence on primary manganese ore resources, and reducing the environmental pollution risk caused by the stockpiling of electrolytic manganese slag. It has significant economic, environmental and social benefits and promotes the sustainable development of the electrolytic manganese industry.

[0037] Furthermore, in step S200, the device for recovering residual manganese resources from electrolytic manganese slag needs to perform a roughing and a scavenging process when separating the slurry. The magnetic field strength of the roughing process is 1.3 to 1.7 T, and the magnetic field strength of the scavenging process is 0.4 to 1.0 T.

[0038] The beneficial effect of adopting the above-mentioned further scheme is that by performing multiple magnetic separations with different magnetic field strengths, the residual magnetic manganese particles can be recovered as much as possible, thereby improving the overall recovery rate of manganese resources.

[0039] Further, in step S300, manganese-rich concentrate and sulfuric acid are mixed at a liquid-to-solid ratio of 4-10:1 and an acid-to-ore mass ratio of 0.5-0.7:1, and reacted at room temperature for 4-10 hours.

[0040] The beneficial effects of adopting the above-mentioned further scheme are: to promote the effective leaching of manganese ions from manganese-rich concentrate, to increase the manganese content and quality in the leachate, and to facilitate the subsequent obtaining of high-quality manganese sulfate solution.

[0041] Furthermore, in step S400, the sulfuric acid concentration is 30% to 93%, and the mass ratio of sulfuric acid to solid is 0.1 to 2:1;

[0042] In step S500, the calcination temperature is 60℃~200℃, and the calcination time is 2h~6h.

[0043] The beneficial effect of adopting the above-mentioned further scheme is that it facilitates the efficient recovery and in-depth utilization of residual manganese resources in electrolytic manganese slag. Attached Figure Description

[0044] Figure 1 This is the apparatus for recovering residual manganese resources from electrolytic manganese slag in Embodiment 1 of the present invention. Figure 1 ;

[0045] Figure 2 This is the apparatus for recovering residual manganese resources from electrolytic manganese slag in Embodiment 1 of the present invention. Figure 2 ;

[0046] Figure 3 This is a diagram of the apparatus for recovering residual manganese resources from electrolytic manganese slag in Embodiment 2 of the present invention;

[0047] Figure 4This is a schematic diagram of the magnetic separator drum structure in Embodiment 2 of the present invention.

[0048] The attached diagram lists the components represented by each number as follows:

[0049] 1. Magnetic separator frame; 2. Magnetic separation chamber; 3. Magnetic separation drum assembly; 4. Power assembly; 5. Magnetic material separation assembly; 6. Magnetic separation drum; 7. Electromagnetic coil; 8. Rotating shaft; 9. Shaft support; 10. Power motor; 11. Reducer; 12. Separation chamber; 13. Receiving plate; 14. Flushing pipe; 15. Feed hopper; 16. Filter plate; 17. Anti-wear membrane; 18. Electromagnet; 19. Conductive slip ring; 20. Angle sensor; 21. Control assembly; 22. Strong magnetic zone; 23. Weak magnetic zone. Detailed Implementation

[0050] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0051] In the description of this invention, it should be understood that the terms "center," "length," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "inner," "outer," "circumferential," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the system or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0052] In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0053] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0054] Example 1

[0055] like Figure 1 , Figure 2 As shown, an apparatus for recovering residual manganese resources from electrolytic manganese slag includes...

[0056] The magnetic separator frame 1 has a magnetic separation chamber 2, and a magnetic separation drum assembly 3 is installed inside the magnetic separation chamber 2. The magnetic separation drum assembly 3 creates a magnetic field environment within the magnetic separation chamber 2, enabling the effective adsorption of magnetic manganese particles in the electrolytic manganese slag. When the electrolytic manganese slag enters the magnetic separation chamber 2, the magnetic separation drum assembly 3 starts to operate. The magnetic field generated on the surface of the magnetic separation drum 6 adsorbs the magnetic manganese particles, while non-magnetic impurities are separated from them under the influence of gravity and other forces, thus achieving preliminary enrichment.

[0057] The power unit 4 is installed on the magnetic separator frame 1, and the output end of the power unit 4 is connected to the magnetic separator drum assembly 3. The power unit 4 drives the magnetic separator drum assembly 3 to rotate continuously, ensuring the continuity of the magnetic separation process.

[0058] The magnetic material separation component 5 is installed on the side wall of the magnetic separation chamber 2 and is used to separate the magnetic material on the magnetic separation drum assembly 3. When the magnetic separation drum 6 rotates and attracts the magnetic manganese particles to a certain position, the magnetic material separation component 5 plays its role, causing the magnetic manganese particles to detach from the surface of the magnetic separation drum 6, thus completing the separation process.

[0059] like Figure 1 , Figure 2 As shown, in some embodiments, the magnetic separator drum assembly 3 includes a magnetic separator drum 6, inside which an electromagnetic coil 7 is installed. The electromagnetic coil 7 is electrically connected to a control component. The control component energizes the electromagnetic coil 7 to generate a magnetic field, and the current can be adjusted according to actual needs to flexibly change the magnetic field strength to adapt to electrolytic manganese slag with different magnetic properties, thereby improving the accuracy of magnetic separation. A rotating shaft 8 is connected to the middle of the magnetic separator drum 6. The rotating shaft 8 extends out of the magnetic separation chamber 2 and is mounted on the magnetic separator frame 1 via a shaft support 9. The shaft support 9 provides support and stability for the rotating shaft 8, ensuring that the magnetic separator drum 6 can rotate smoothly and avoiding shaking or deviation during rotation, thus ensuring the stability and reliability of the magnetic separation process.

[0060] The electromagnetic coil 7 is connected to a current-carrying wire. The current-carrying guide passes through the middle of the rotating shaft 8 and connects to the conductive slip ring installed on the rotating shaft 8. The magnetic separator frame 1 is equipped with a carbon brush assembly that cooperates with the conductive slip ring.

[0061] In another embodiment, the power assembly 4 includes a power motor 10, which is mounted on the magnetic separator frame 1 and has a reducer 11 connected to its output end. The output end of the reducer 11 is connected to the input end of the magnetic separator drum assembly 3. The power motor 10 can be an AC asynchronous motor. The power motor 10 provides the power source for the entire magnetic separator. Its high-speed rotation is reduced and increased in torque by the reducer 11 and then transmitted to the magnetic separator drum assembly 3, so that the magnetic separator drum 6 can perform magnetic separation at a suitable speed, ensuring that the magnetic field on the surface of the magnetic separator drum 6 has sufficient interaction time with the manganese particles, thereby improving the magnetic separation efficiency.

[0062] The magnetic material separation assembly 5 includes a separation chamber 12, in which a receiving plate 13 is installed. The receiving plate 13 is inclined and its end is close to the magnetic separation drum assembly 3 and located below the rotation axis of the magnetic separation drum assembly 3. When the magnetic separation drum 6 rotates and brings the magnetic manganese particles to the vicinity of the receiving plate 13, some of the magnetic manganese particles naturally fall onto the inclined receiving plate 13 by means of the centrifugal force of the rotation of the magnetic separation drum 6 and gravity, and slide down the receiving plate 13 to the designated collection area. A rinsing pipe 14 is also installed on the separation chamber 12. The rinsing pipe 14 has rinsing holes facing the magnetic separation drum assembly 3. The rinsing holes are used to rinse the magnetic material on the surface of the magnetic separation drum assembly 3 and drop it onto the receiving plate 13. During the natural detachment of magnetic manganese particles, the water flow sprayed from the rinsing pipe 14 can further assist in rinsing, ensuring that the magnetic manganese particles completely detach from the surface of the magnetic separation drum 6, preventing residues, and ensuring the continuity and efficiency of the magnetic separation process.

[0063] The magnetic separator frame 1 is also equipped with a feed hopper 15, which is connected to the magnetic separation chamber 2. A filter plate 16 is installed inside the feed hopper 15. The electrolytic manganese slag slurry is fed into the magnetic separation chamber 2 evenly and stably through the feed hopper 15. The filter plate 16 performs preliminary filtration on the input slurry, intercepting larger impurity particles or agglomerates to prevent these impurities from entering the magnetic separation chamber 2 and clogging the magnetic separation drum 6 or affecting its normal operation. At the same time, it allows the manganese particles in the slurry to be more evenly dispersed in the magnetic separation chamber 2, making better contact with the magnetic field and improving the magnetic separation efficiency and effect.

[0064] Example 2

[0065] like Figure 3 and Figure 4 As shown, the difference between Embodiment 2 and Embodiment 1 is that the magnetic separation drum 6 is wrapped with an anti-wear film 17, and multiple electromagnets 18 are evenly installed inside the magnetic separation drum 6. Each electromagnet 18 is connected to a conductive slip ring 19 through a connecting wire, and the connecting wire is installed inside the rotating shaft 8. An angle sensor 20 is connected to the end of the rotating shaft 8, and the angle sensor 20 and multiple conductive slip rings 19 are electrically connected to a control component 21.

[0066] The upper side of the magnetic separator 6 is the strong magnetic zone 22, and the lower side of the magnetic separator 6 is the weak magnetic zone 23. When the magnetic separator 6 rotates from the weak magnetic zone 23 to the strong magnetic zone 22 along the rotation direction, the current passed to the electromagnet 18 gradually increases. The rinsing pipe 14 is located on the upper side of the strong magnetic zone 22.

[0067] In this embodiment, the area near the bottom of the magnetic separation chamber 2 on the lower side of the magnetic separation drum 6 is the weak magnetic zone 23, while the highest point on the upper side of the magnetic separation drum is the strong magnetic zone 22. Specifically, six electromagnets 18 are evenly installed inside the magnetic separation drum 6. When an electromagnet 18 is in the weak magnetic zone 23, the angle sensor 20 can sensitively detect its current position and quickly transmit this signal to the control component 21. Upon receiving the signal, the control component 21 immediately and precisely controls the current supplied to the corresponding electromagnet 18, reducing it to a minimum. The reduction in current directly leads to a decrease in magnetic field strength, thus creating a weak magnetic environment in that area. Conversely, when an electromagnet 18 moves to the strong magnetic zone 22, the angle sensor 20 also captures this positional change in real time and promptly transmits the signal to the control component 21. At this time, the control component 21 adjusts the current supplied to the electromagnet 18 to its maximum value. The significant increase in current significantly enhances the magnetic field strength, thereby generating a strong magnetic field in the strong magnetic zone 22.

[0068] As the electromagnet 18 rotates from the weak magnetic region 23 to the strong magnetic region 22, the control component 21 gradually and uniformly increases the current flowing through the electromagnet 18 according to the position change of the electromagnet 18. This smooth current adjustment process causes the magnetic field strength to gradually increase, thereby forming a gradual magnetic field distribution in the corresponding area of ​​the magnetic separator drum.

[0069] When electrolytic manganese slag enters the magnetic separation zone from the feed hopper 15 and begins to contact the anti-wear film 17 on the outer surface of the magnetic separation drum from the intermediate magnetic zone, the anti-wear film 17 both protects the magnetic separation drum and provides a good contact interface for the adsorption of electrolytic manganese slag. In the intermediate magnetic zone, some of the electrolytic manganese slag will be adsorbed onto the surface of the magnetic separation drum under the action of appropriate magnetic force.

[0070] Because the upper end of the magnetic separator drum is a strong magnetic zone 22, when electrolytic manganese slag enters the strong magnetic zone 22 as the magnetic separator drum rotates, it will be subjected to a strong magnetic field force. This strong magnetic field force is sufficient to overcome the gravity of the electrolytic manganese slag itself, enabling it to move towards the strong magnetic zone 22 and be stably adsorbed. This avoids a large amount of electrolytic manganese slag being concentrated in the medium magnetic zone or a specific area of ​​the magnetic separator drum, thus achieving a uniform distribution of the electrolytic manganese slag on the surface of the magnetic separator drum.

[0071] Meanwhile, although the magnetic field strength in the weak magnetic zone 23 is relatively low, it still plays an important role. It is mainly used to adsorb the remaining electrolytic manganese slag, ensuring that all the passing electrolytic manganese slag is properly adsorbed onto the magnetic separation drum 6. This gradual change in magnetic field strength from the weak magnetic zone 23 to the medium magnetic zone and then to the strong magnetic zone 22 allows the electrolytic manganese slag to be evenly adsorbed onto the surface of the magnetic separation drum throughout the entire magnetic separation process. This effectively prevents the electrolytic manganese slag from agglomerating, thereby improving magnetic separation efficiency and quality, and laying a good foundation for subsequent processing steps.

[0072] Furthermore, when the electrolytic manganese slag accumulates in the strong magnetic zone 22 and gradually rotates towards the non-magnetic zone, the high-pressure water sprayed from the flushing pipe 14 washes the electrolytic manganese slag into the separation chamber 12. Since electrolytic manganese always tends to accumulate in the strong magnetic zone 2, even when the magnetic separation drum 6 drives the electrolytic manganese slag to rotate, the electrolytic manganese slag will not rotate to the non-magnetic zone. The electrolytic manganese slag will continue to accumulate in the strong magnetic zone 22. The inclined high-pressure water sprayed from the flushing pipe 14 acts on the strong magnetic zone 22 and is close to the non-magnetic zone, which helps to quickly wash the electrolytic manganese slag into the separation chamber 12 and transport it to the designated position through the receiving plate 13.

[0073] This invention also provides a method for recovering residual manganese resources from electrolytic manganese slag, applied to the apparatus for recovering residual manganese resources from electrolytic manganese slag as described above, comprising the following steps:

[0074] S100. Prepare a slurry with an electrolytic manganese slag mass fraction of 25% to 35% by mixing electrolytic manganese slag with water;

[0075] S200. The slurry prepared in step S100 is passed into a device for recovering residual manganese resources in electrolytic manganese slag to separate manganese-rich concentrate and tailings.

[0076] The device for recovering residual manganese resources from electrolytic manganese slag requires a roughing and a scavenging process when separating the slurry. The magnetic field strength for the roughing process is 1.3 to 1.7 T, and the magnetic field strength for the scavenging process is 0.4 to 1.0 T.

[0077] S300. The manganese-rich concentrate separated in step S200 is mixed with sulfuric acid and reacted to obtain leaching solution and leaching residue;

[0078] In this process, manganese-rich concentrate is mixed with sulfuric acid at a liquid-to-solid ratio of 4–10:1 and an acid-to-ore mass ratio of 0.5–0.7:1, and the mixture is reacted at room temperature for 4–10 hours.

[0079] S400. Mix the tailings obtained in step S200 and the leaching residue obtained in step S300, add sulfuric acid, and stir evenly to obtain an acidified mixture;

[0080] The sulfuric acid concentration is 30%–93%, and the mass ratio of sulfuric acid to solid is 0.1–2:1.

[0081] S500. The acidified mixture from step S400 is placed in a roasting furnace and roasted to obtain a roasted product. The roasted product is mixed with pure water, stirred and leached to obtain a manganese sulfate solution.

[0082] The roasting temperature is 60℃~200℃, and the roasting time is 2h~6h.

[0083] S600. The manganese sulfate solution from step S500 is filtered to separate the solution and filter residue. The filter residue is washed until neutral and then discharged into the slag bin.

[0084] Example 1

[0085]

[0086]

[0087] Table 1. Raw materials used in the experiment (manganese slag)

[0088] 1) Magnetic separation for manganese enrichment: After drying the above-mentioned manganese slag, a 200g sample was taken for "one roughing and two scavenging" to obtain 25.78g of manganese-rich concentrate with a manganese grade of approximately 19.96% and 174.22g of tailings with a manganese grade of approximately 4.89%. The specific test results are shown in Table 2.

[0089]

[0090] Table 2 Results of mineral processing tests for primary roughing and secondary scavenging

[0091] 2) Concentrate leaching: Take the concentrate obtained in step 1) and leach it. Control the liquid-solid ratio to 6:1, add 16g of concentrated sulfuric acid, and leach for 6 hours. The manganese concentration of the leaching solution is 32.29g / L, and the leaching residue is 18.78g with a manganese grade of 2.42%.

[0092] 3) Acid roasting: The leaching residue obtained in step 2) is mixed with the magnetic separation tailings in step 1), and a 30% sulfuric acid solution is prepared, wherein the mass of concentrated sulfuric acid is 27g. The mixture is added to the above mixed ore and roasted in a muffle furnace for 4 hours at a roasting temperature of 80℃.

[0093] 4) Water washing: After the above samples were calcined, pure water was added for washing. The water-to-solid ratio was 4:1 and the manganese concentration in the solution was 11.80 g / L.

[0094] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0095] The above description is only a preferred embodiment of the present invention and is 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 device for recovering residual manganese resources from electrolytic manganese slag, characterized in that: include A magnetic separator frame (1) has a magnetic separation chamber (2) and a magnetic separation drum assembly (3) is installed inside the magnetic separation chamber (2); Power assembly (4), which is mounted on the magnetic separator frame (1), and the output end of the power assembly (4) is connected to the magnetic separator drum assembly (3). Magnetic material separation assembly (5) is installed on the side wall of the magnetic separation chamber (2) and is used to separate the magnetic material on the magnetic separation roller assembly (3).

2. The apparatus for recovering residual manganese resources from electrolytic manganese slag according to claim 1, characterized in that: The magnetic separation drum assembly (3) includes a magnetic separation drum (6), an electromagnetic coil (7) is installed inside the magnetic separation drum (6), and the electromagnetic coil (7) is electrically connected to the control component; The magnetic separator drum (6) is connected to a rotating shaft (8) in the middle. The rotating shaft (8) extends out of the magnetic separator chamber (2). The rotating shaft (8) is mounted on the magnetic separator frame (1) through a shaft support (9).

3. The apparatus for recovering residual manganese resources from electrolytic manganese slag according to claim 1, characterized in that: The power assembly (4) includes a power motor (10), which is mounted on the magnetic separator frame (1) and the output end of the power motor (10) is connected to a speed reducer (11), the output end of the speed reducer (11) is connected to the input end of the magnetic separator roller assembly (3).

4. The apparatus for recovering residual manganese resources from electrolytic manganese slag according to claim 2, characterized in that: The magnetic material separation assembly (5) includes a separation chamber (12), in which a receiving plate (13) is installed. The receiving plate (13) is inclined and its end is close to the magnetic separation roller assembly (3) and located below the rotation axis of the magnetic separation roller assembly (3). A flushing pipe (14) is also installed on the separation chamber (12). The flushing pipe (14) has a flushing hole facing the magnetic separation roller assembly (3) to flush the magnetic material on the surface of the magnetic separation roller assembly (3) and drop it onto the receiving plate (13).

5. The apparatus for recovering residual manganese resources from electrolytic manganese slag according to claim 1, characterized in that: The magnetic separator frame (1) is also equipped with a feed bin (15), which is connected to the magnetic separation chamber (2), and a filter plate (16) is installed inside the feed bin (15).

6. The apparatus for recovering residual manganese resources from electrolytic manganese slag according to claim 4, characterized in that: The magnetic separation drum (6) is wrapped with an anti-wear film (17). Multiple electromagnets (18) are evenly installed inside the magnetic separation drum (6). Each electromagnet (18) is connected to a conductive slip ring (19) through a connecting wire. The connecting wire is installed inside the rotating shaft (8). An angle sensor (20) is connected to the end of the rotating shaft (8). The angle sensor (20) and the multiple conductive slip rings (19) are electrically connected to a control component (21). The upper side of the magnetic separator (6) is a strong magnetic zone (22), and the lower side of the magnetic separator (6) is a weak magnetic zone (23). When the magnetic separator (6) rotates from the weak magnetic zone (23) to the strong magnetic zone (22) along the rotation direction, the current passed into the electromagnet (18) gradually increases. The flushing pipe (14) is located above the strong magnetic zone (22).

7. A method for recovering residual manganese resources from electrolytic manganese slag, applied to the apparatus for recovering residual manganese resources from electrolytic manganese slag as described in any one of claims 1 to 5, characterized in that, Includes the following steps: S100. Prepare a slurry with an electrolytic manganese slag mass fraction of 25% to 35% by mixing electrolytic manganese slag with water; S200. The slurry prepared in step S100 is passed into a device for recovering residual manganese resources in electrolytic manganese slag to separate manganese-rich concentrate and tailings. S300. The manganese-rich concentrate separated in step S200 is mixed with sulfuric acid and reacted to obtain leaching solution and leaching residue; S400. Mix the tailings obtained in step S200 and the leaching residue obtained in step S300, add sulfuric acid, and stir evenly to obtain an acidified mixture; S500. The acidified mixture from step S400 is placed in a roasting furnace and roasted to obtain a roasted product. The roasted product is mixed with pure water, stirred and leached to obtain a manganese sulfate solution. S600. The manganese sulfate solution from step S500 is filtered to separate the solution and filter residue. The filter residue is washed until neutral and then discharged into the slag bin.

8. The method for recovering residual manganese resources from electrolytic manganese slag according to claim 7, characterized in that: In step S200, the device for recovering residual manganese resources from electrolytic manganese slag needs to separate the slurry through a roughing and a scavenging process. The magnetic field strength of the roughing process is 1.3 T to 1.7 T, and the magnetic field strength of the scavenging process is 0.4 T to 1.0 T.

9. The method for recovering residual manganese resources from electrolytic manganese slag according to claim 7, characterized in that: In step S300, manganese-rich concentrate and sulfuric acid are mixed at a liquid-to-solid ratio of 4-10:1 and an acid-to-ore mass ratio of 0.5-0.7:1, and reacted at room temperature for 4-10 hours.

10. The method for recovering residual manganese resources from electrolytic manganese slag according to claim 7, characterized in that: In step S400, the sulfuric acid concentration is 30% to 93%, and the mass ratio of sulfuric acid to solid is 0.1 to 2:

1. In step S500, the calcination temperature is 60℃~200℃, and the calcination time is 2h~6h.

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