Roller for leaching

Abstract

The utility model relates to the technical field of mineral substance leaching devices, and particularly discloses a leaching roller which comprises a mixing cylinder for leaching a target object, a driving roller frame arranged below the mixing cylinder and a lifting platform arranged below the driving roller frame, the mixing cylinder comprises an outer cylinder and an inner cylinder, and one or more groups of through holes are formed in the inner side of the inner cylinder in an annular array and are used for mixing and contacting liquid and a target object; a track is arranged on the outer side of the outer cylinder. Through the design of the through holes and the partition plates of the inner cylinder, uniform mixing of liquid and a target object is promoted, and the leaching effect is optimized; due to the design of the driving roller frame and the matching of a plurality of groups of roller supporting frames and a track, the stability of the mixing drum is enhanced, and the friction and abrasion are reduced; the positioning cylinder and the positioning ring are matched to ensure that the relative position between the inner barrel and the outer barrel is fixed, and deviation of equipment in operation is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of mineral leaching devices, and specifically relates to a drum for leaching. Background Art

[0002] Leaching processes include in-situ leaching, agitation leaching, etc. Among them, drum leaching is also often applied. The size of the drum body has a direct impact on the tumbling effect. A larger drum body may affect the tumbling effect, thereby affecting the leaching efficiency. An overly large drum body may cause uneven distribution of minerals in the drum, further affecting the mixing of materials and the leaching process. The design of the drum needs to find a balance between the drum body capacity and the tumbling effect.

[0003] In order to prevent liquid leakage, the drum body is designed with good sealing, but this also makes it inconvenient to unload ore and is prone to mineral residue. Although the sealing design can effectively prevent liquid leakage, it may cause difficulties in the ore unloading process, increasing the operation complexity. The problem of mineral residue may affect subsequent processing steps or increase the operation cost.

[0004] In order to facilitate ore addition, the lid and the inlet are designed to be larger, but this makes the operation of the lid more difficult and prone to inconvenience when opening the lid. Although a large lid can improve the convenience of ore addition, it also increases the operation difficulty. The design of the lid needs to balance convenient operation and effective closure to balance the convenience of ore addition and the operation comfort.

[0005] Based on this, the present application provides a drum for leaching. Summary of the Utility Model

[0006] Aiming at the deficiencies of the prior art, the utility model provides a drum for leaching, which solves the problems that the combination and installation of the drum in the existing drum leaching lead to difficulties in the subsequent leaching and addition of the target substance.

[0007] The drum for leaching of the utility model includes a mixing drum for leaching the target substance, a driving roller frame arranged below the mixing drum, and a lifting platform installed under the driving roller frame;

[0008] The mixing drum includes an outer drum and an inner drum. A group or multiple groups of through holes are arranged in an annular array on the inner side of the inner drum for the liquid and the target substance to mix and contact;

[0009] A track is arranged on the outer side of the outer drum, and the track is adapted to the driving roller frame;

[0010] The lifting platform includes a support platform. An arc-shaped cover one and an arc-shaped cover two are arranged in the middle of the bottom of the support platform. A limiting wheel is arranged between the arc-shaped cover one and the arc-shaped cover two. A telescopic member is movably arranged on the support platform, and the telescopic member drives the support platform to swing left and right.

[0011] As a further improvement of the present utility model, the driving roller frame comprises at least two groups of roller support frames. A base is arranged at the bottom of the roller support frame, and a driver is arranged above the base. The driver drives the roller support frame to drive the mixing cylinder to rotate along the track.

[0012] As a further improvement of the present utility model, a sealing cover is arranged on the outer side of the outer cylinder, and a sealing convex ring is arranged on the side of the sealing cover close to the outer cylinder.

[0013] As a further improvement of the present utility model, a fitting area is arranged on the outer cylinder close to the sealing convex ring, and the sealing convex ring is adapted to the fitting area arranged on the outer cylinder.

[0014] As a further improvement of the present utility model, a sealing groove is arranged on the inner side of one side of the sealing cover close to the sealing convex ring, and the sealing groove is adapted to the combined protrusion arranged at one end of the inner cylinder.

[0015] As a further improvement of the present utility model, a spacer plate is arranged on the inner side of the inner cylinder. The outer side of the spacer plate is annularly arranged and is adapted to the inner side of the inner cylinder.

[0016] As a further improvement of the present utility model, a positioning cylinder is arranged at the bottom of the inner side of the outer cylinder, and a positioning ring is arranged at the bottom of the inner side of the inner cylinder. The positioning ring is adapted to the positioning cylinder;

[0017] As a further improvement of the present utility model, a fixed distance is maintained between the inner cylinder and the outer cylinder, and a soaking area is arranged at the fixed distance for filling leaching liquid.

[0018] As a further improvement of the present utility model, through holes are arranged on one side of both the outer cylinder and the inner cylinder, and sealing blocks are arranged at the through holes, which is convenient for the addition of the target object and the liquid.

[0019] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0020] Through the through hole and spacer plate design of the inner cylinder of the present utility model, the uniform mixing of the liquid and the target object is promoted, and the leaching effect is optimized. The fixed distance and the soaking area ensure that the target object is fully soaked in the liquid;

[0021] The design of the driving roller frame enhances the stability of the mixing cylinder through the adaptation of multiple groups of roller support frames and the track, and reduces friction and wear;

[0022] The cooperation of the positioning cylinder and the positioning ring ensures the relative position fixation between the inner cylinder and the outer cylinder, and prevents the deviation during the operation of the equipment;

[0023] The cooperation between the sealing groove on the sealing cover and the sealing convex ring, as well as the combined protrusions of the inner cylinder, ensures the effective sealing of the liquid and reduces the risk of leakage;

[0024] The through-hole design facilitates the addition of the target object and the liquid, and the sealing block effectively closes the through-hole after the addition operation to prevent liquid leakage;

[0025] The design of the sealing system and the equipment facilitates disassembly and cleaning, reduces the maintenance difficulty and cost, and at the same time reduces the need for frequent replacement of the sealing material;

[0026] The effective sealing design reduces liquid leakage, protects the safety and hygiene of the operating environment, and reduces potential safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation to the present application. In the drawings:

[0028] Figure 1 It is a schematic structural diagram of the combination of the mixing cylinder, the driving roller frame and the lifting table of the present utility model;

[0029] Figure 2 It is a schematic three-dimensional structural diagram of the combination of the mixing cylinder and the driving roller frame of the present utility model;

[0030] Figure 3 It is a schematic front view structural diagram of the combination of the mixing cylinder and the driving roller frame of the present utility model;

[0031] Figure 4 It is a schematic front view structural diagram of the mixing cylinder of the present utility model;

[0032] Figure 5 For the present utility model Figure 4 It is a schematic A-A sectional view structure diagram;

[0033] Figure 6 It is a schematic top view sectional structure diagram of the mixing cylinder of the present utility model;

[0034] Figure 7 For the present utility model Figure 5 It is a schematic enlarged structure diagram at position A.

[0035] In the figure: 1. Mixing cylinder; 2. Driving roller frame; 3. Lifting table;

[0036] 11. Outer cylinder; 12. Track; 13. Sealing cover; 14. Sealing groove; 15. Sealing convex ring; 16. Combined protrusion; 17. Spacer; 18. Immersion area; 19. Positioning cylinder; 110. Positioning ring; 111. Inner cylinder; 112. Fitting area;

[0037] 21. Drive; 22. Roller support frame; 23. Base;

[0038] 31. Support platform; 32. First arc-shaped cover; 33. Limit wheel; 34. Second arc-shaped cover; 35. Telescopic member. Detailed implementation manner

[0039] The following will disclose multiple implementation manners of the present utility model with drawings. For the sake of clear description, many physical details will be described together in the following narrative. However, it should be understood that these physical details should not be used to limit the present utility model. That is to say, in some implementation manners of the present utility model, these physical details are unnecessary. In addition, for the sake of simplifying the drawings, some conventional structures and components will be shown in a simple schematic manner in the drawings.

[0040] In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0041] The leaching process commonly uses a rotary drum for leaching minerals, and the size of the drum body has a direct impact on the tumbling effect. A larger drum body may affect the tumbling effect, thereby affecting the leaching efficiency; and, in order to facilitate adding ore, the lid and the inlet are designed to be larger, but this makes the operation of the lid more difficult and easily leads to inconvenient operation when opening the lid.

[0042] Based on this, the present application provides a rotary drum for leaching. Please refer to Figure 1 、 Figure 2 and Figure 3 , including a mixing drum 1 for leaching the target substance, a driving roller frame 2 disposed below the mixing drum 1, and a lifting platform 3 installed under the driving roller frame 2;

[0043] The mixing drum 1 includes an outer drum 11 and an inner drum 111. One or more groups of through holes are arranged in an annular array on the inner side of the inner drum 111 for the liquid to mix and contact with the target substance;

[0044] A track 12 is arranged on the outer side of the outer drum 11, and the track 12 is adapted to the driving roller frame 2;

[0045] The lifting platform 3 includes a support platform 31. An arc-shaped cover one 32 and an arc-shaped cover two 34 are arranged in the middle of the bottom of the support platform 31. A limit wheel 33 is arranged between the arc-shaped cover one 32 and the arc-shaped cover two 34. A telescopic member 35 is movably arranged on the support platform 31, and the telescopic member 35 drives the support platform 31 to swing left and right.

[0046] The mixing cylinder 1 is composed of an outer cylinder 11 and an inner cylinder 111. A set or multiple sets of through-holes in an annular array are provided on the inner side of the inner cylinder 111. These through-holes can enable the effective mixing and contact of the liquid and the target, enhancing the leaching effect. The setting of the through-holes helps to increase the contact area between the material and the liquid and the mixing efficiency.

[0047] The number, size, and distribution pattern of the through-holes can be adjusted according to needs to optimize the mixing effect. Different designs can adapt to the requirements of different types of minerals and leaching liquids.

[0048] The driving roller frame 2 is located below the mixing cylinder 1 and is used to drive the rotation of the cylinder. The design of the roller frame should ensure that sufficient power can be provided to make the mixing cylinder 1 rotate stably.

[0049] A track 12 is provided on the outer side of the outer cylinder 11, and the track 12 cooperates with the driving roller frame 2 to ensure the smooth operation of the mixing cylinder 1 during rotation. This design can reduce friction and wear and improve the durability and stability of the equipment.

[0050] The support platform 31 is located on the upper part of the lifting platform 3 and supports the installation and stability of the mixing cylinder 1. An arc-shaped cover one 32 and an arc-shaped cover two 34 are provided in the middle of the bottom of the support platform 31, and these covers help to protect and fix the mixing cylinder 1.

[0051] The design of the arc-shaped cover can effectively guide the movement of the mixing cylinder 1, and the limit wheel 33 ensures the stability of the mixing cylinder 1 on the track 12 and prevents it from deviating from the track 12.

[0052] The telescopic member 35 movably provided on the support platform 31 can drive the support platform 31 to swing left and right. This design can make the mixing cylinder 1 adjust its position more flexibly during operation to adapt to different operation requirements.

[0053] The through-hole design of the inner cylinder 111 increases the contact area between the liquid and the target, thereby improving the mixing efficiency and leaching effect.

[0054] The cooperation between the track 12 of the outer cylinder 11 and the driving roller frame 2, as well as the design of the arc-shaped cover and the limit wheel 33, enhances the stability of the mixing cylinder 1, reduces the wear of the equipment, and improves the durability of the equipment.

[0055] The telescopic member 35 enables the support platform 31 to swing left and right, improving the flexibility of the equipment and facilitating the adjustment and operation of the mixing cylinder 1. This design makes the equipment more adaptable to different requirements during actual use.

[0056] By optimizing the structure of the mixing cylinder 1 and the through-hole design, the phenomenon of pulp splashing can be effectively reduced, thereby reducing mineral loss and improving resource utilization rate.

[0057] The design of the lifting platform 3 makes the installation and unloading of the mixing drum 1 more convenient, reduces the operation difficulty, and improves the work efficiency.

[0058] Please refer to Figure 1 、 Figure 2 and Figure 3 The driving roller frame 2 includes at least two groups of roller support frames 22. A base 23 is provided at the bottom of the roller support frame 22, and a driver 21 is provided above the base 23. The driver 21 drives the roller support frame 22 to drive the mixing drum 1 to rotate along the track 12.

[0059] A sealing cover 13 is provided on the outer side of the outer cylinder 11. A sealing convex ring 15 is provided on the side of the sealing cover 13 close to the outer cylinder 11.

[0060] An engaging area 112 is formed on the outer cylinder 11 on the side close to the sealing convex ring 15. The sealing convex ring 15 is adapted to the engaging area 112 provided on the outer cylinder 11.

[0061] The driving roller frame 2 includes at least two groups of roller support frames 22. A base 23 is installed at the bottom of each group of roller support frames 22. The base 23 provides stable support for the roller support frame 22 and ensures the stable operation of the rollers.

[0062] A driver 21 is provided above the base 23. The driver 21 drives the roller support frame 22 to move along the track 12 through a transmission device (such as a motor and gears). The power and type of the driver 21 can be selected according to the size and requirements of the mixing drum 1 to ensure that the mixing drum 1 can rotate evenly.

[0063] The rollers on the roller support frame 22 are in close fit with the track 12 of the outer cylinder 11 to ensure that the mixing drum 1 remains stable during rotation. The material and design of the rollers need to ensure that they can withstand the wear of long-term operation.

[0064] A sealing cover 13 is provided on the outer side of the outer cylinder 11. The sealing cover 13 is designed to seal the mixing drum 1 to prevent liquid leakage. The material of the sealing cover 13 needs to have good corrosion resistance and wear resistance.

[0065] A sealing convex ring 15 is provided on the side of the sealing cover 13 close to the outer cylinder 11. The sealing convex ring 15 is designed to cooperate with the engaging area 112 on the outer cylinder 11 to form an effective seal. The size and shape of the sealing convex ring 15 are designed to match the engaging area 112 to ensure the reliability of the sealing effect.

[0066] An engaging area 112 is formed on the outer cylinder 11 on the side close to the sealing convex ring 15. The shape and size of this engaging area 112 match the sealing convex ring 15 to form an effective sealing interface. The engaging area 112 can be designed in a groove shape to accommodate the sealing convex ring 15.

[0067] By using at least two sets of roller support frames 22, combined with the design of the base 23 and the drive 21, the weight of the mixing drum 1 can be effectively dispersed, the stability of the equipment can be increased, and it is ensured that the mixing drum 1 does not shake or shift during rotation.

[0068] The tight fit between the roller support frame 22 and the track 12 improves the smooth operation of the mixing drum 1, reduces friction and wear, and extends the service life of the equipment.

[0069] The design of the sealing cover 13 and the sealing convex ring 15 can effectively prevent liquid leakage. The cooperation between the sealing convex ring 15 and the fitting area 112 can provide a firm sealing interface, reducing the possibility of liquid overflow or volatilization.

[0070] A good sealing design reduces the phenomenon of pulp splashing, protects the operating environment and reduces mineral loss.

[0071] The design of the sealing cover 13 makes the sealing operation simple and convenient. Users can ensure the sealing effect of the equipment by installing and adjusting the sealing cover 13, reducing the operation complexity.

[0072] The design of the sealing cover 13 and the fitting area 112 facilitates disassembly and cleaning, making the maintenance of the equipment more efficient.

[0073] The drive 21 can precisely control the movement speed of the roller support frame 22, making the rotation of the mixing drum 1 more uniform, thereby improving the mixing effect and ensuring the uniformity and efficiency of the leaching process.

[0074] The matching design of the fitting area 112 and the sealing convex ring 15 optimizes the sealing effect and the sealing performance of the equipment, avoids the liquid leakage problem that may occur in the traditional sealing method, and improves the overall performance of the equipment.

[0075] Please refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 7 , a sealing groove 14 is provided on one side of the sealing cover 13 close to the inner side of the sealing convex ring 15, and the sealing groove 14 is adapted to the combined protrusion 16 provided at one end of the inner cylinder 111.

[0076] The cooperation between the sealing groove 14 on the sealing cover 13 and the sealing convex ring 15 ensures that the sealing cover 13 can form a tight seal with the outer cylinder 11 to prevent liquid leakage. The sealing groove 14 can firmly accommodate the sealing convex ring 15, thereby improving the sealing effect.

[0077] The cooperation between the combined protrusions 16 on the inner cylinder 111 and the sealing groove 14 enhances the tightness of the seal, further reducing the risk of liquid leakage from the sealing interface and ensuring the sealing performance of the system.

[0078] Through the cooperation between the sealing groove 14 and the sealing convex ring 15, the sealing cover 13 can be stably fixed on the outer cylinder 11, preventing the sealing cover 13 from moving due to vibration or rotation during operation and increasing the overall stability of the equipment.

[0079] The combined protrusions 16 provide additional support to ensure the stability of the inner cylinder 111 when the sealing cover 13 is closed and prevent equipment failures caused by poor sealing.

[0080] The design of the sealing groove 14 and the combined protrusions 16 makes the sealing system easy to disassemble, facilitating cleaning and maintenance. Users can quickly inspect and replace the sealing components, reducing equipment downtime and maintenance costs.

[0081] A good sealing design can reduce the wear of the sealing material, extend the service life of the seal, and thus reduce the need for frequent replacement of the sealing material. In addition, an effective sealing system prevents liquid leakage during operation, protects the safety of operators, and reduces the risk of liquid splashing. By reducing liquid leakage, the sealing system can also effectively prevent environmental pollution and ensure a clean and safe operating environment.

[0082] The design of the sealing groove 14 ensures that the sealing convex ring 15 can be accurately embedded, thereby improving the reliability and effectiveness of the seal. This optimized sealing design can significantly enhance the sealing performance of the equipment during long-term use.

[0083] As Figures 4 to 7 shown, a spacer 17 is provided on the inner side of the inner cylinder 111. The outer side of the spacer 17 is annularly arranged and adapted to the inner side of the inner cylinder 111.

[0084] A positioning cylinder 19 is provided at the inner bottom of the outer cylinder 11, and a positioning ring 110 is provided at the inner bottom of the inner cylinder 111. The positioning ring 110 is adapted to the positioning cylinder 19;

[0085] A fixed spacing is maintained between the inner cylinder 111 and the outer cylinder 11. An immersion area 18 is provided at this fixed spacing for filling the leaching liquid.

[0086] Through holes are provided on one side of both the outer cylinder 11 and the inner cylinder 111. Sealing blocks are provided at these through holes to facilitate the addition of the target object and the liquid.

[0087] Spacers 17 are provided on the inner side of the inner cylinder 111. These spacers 17 are annularly distributed along the inner wall of the inner cylinder 111. The spacers 17 do not directly contact the outer cylinder 11 but are closely adapted to the inner side of the inner cylinder 111.

[0088] The main function of the spacer 17 is to form multiple separated areas inside the inner cylinder 111. These areas can promote more uniform mixing of the liquid and the target, improving the leaching efficiency. At the same time, the spacer 17 can also increase the residence time of the target in the liquid, thus enhancing the leaching effect.

[0089] A positioning cylinder 19 is provided at the central position of the inner bottom of the outer cylinder 11. It is a protruding cylindrical structure for mating with the positioning ring 110 of the inner cylinder 111.

[0090] A positioning ring 110 is provided at the corresponding position of the inner bottom of the inner cylinder 111, and its inner diameter matches the outer diameter of the positioning cylinder 19.

[0091] When the inner cylinder 111 is installed into the outer cylinder 11, the positioning ring 110 will be sleeved on the positioning cylinder 19 to ensure the relative position between the inner cylinder 111 and the outer cylinder 11 is fixed, preventing the inner cylinder 111 from shifting during rotation or operation.

[0092] A certain fixed spacing is maintained between the inner cylinder 111 and the outer cylinder 11, and this spacing is defined by the space between the outer side of the inner cylinder 111 and the inner side of the outer cylinder 11.

[0093] This fixed spacing forms an immersion area 18, which is used to fill the leaching liquid. The target fully contacts the liquid in this area to achieve the leaching process.

[0094] Through holes are provided on one side of both the outer cylinder 11 and the inner cylinder 111 for adding the target and the liquid. The positions and sizes of the through holes are designed according to actual needs to ensure the convenience and efficiency of the adding operation.

[0095] Sealing blocks are provided at the positions of the through holes. These sealing blocks can seal the through holes after adding the target and the liquid to prevent liquid leakage. The sealing blocks are usually made of corrosion-resistant and wear-resistant materials to ensure their sealing effect and durability.

[0096] The design of the spacer 17 promotes more uniform mixing of the liquid and the target, increasing the residence time of the target in the liquid, thus improving the leaching efficiency.

[0097] The cooperation between the positioning cylinder 19 and the positioning ring 110 ensures the relative position between the inner cylinder 111 and the outer cylinder 11 is fixed, preventing the inner cylinder 111 from shifting or rotating unstably during operation, and ensuring the stable operation of the equipment.

[0098] By setting a fixed immersion area 18 and maintaining a certain fixed spacing, it is ensured that the target can be fully immersed in the liquid, optimizing the immersion effect and improving the leaching quality.

[0099] The design of the through-hole makes it more convenient to add the target object and the liquid, improving the operation efficiency. At the same time, the use of the sealing block ensures that the through-hole can be effectively sealed after the addition operation is completed, preventing liquid leakage.

[0100] The overall structure of the device is reasonably designed, facilitating disassembly and assembly, and providing convenience for the maintenance and cleaning of the device.

[0101] The use of the sealing block effectively prevents liquid from leaking from the through-hole, protecting the safety and hygiene of the operation environment. At the same time, it also reduces potential safety hazards caused by liquid leakage.

[0102] The above are only the embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, various changes and modifications can be made to the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the scope of the claims of the present utility model.

Claims

1. A drum for leaching, comprising a mixing cylinder (1) for leaching the target object, a driving roller frame (2) disposed below the mixing cylinder (1), and a lifting platform (3) mounted under the driving roller frame (2); characterized in that: The mixing cylinder (1) includes an outer cylinder (11) and an inner cylinder (111), and a group or multiple groups of through holes are arranged in an annular array on the inner side of the inner cylinder (111) for the liquid and the target object to be mixed and contacted; A track (12) is provided on the outer side of the outer cylinder (11), and the track (12) is adapted to the driving roller frame (2); The lifting platform (3) includes a support platform (31), an arc-shaped cover one (32) and an arc-shaped cover two (34) are provided in the middle of the bottom of the support platform (31), a limiting wheel (33) is arranged between the arc-shaped cover one (32) and the arc-shaped cover two (34), and a telescopic member (35) is movably arranged on the support platform (31), and the telescopic member (35) drives the support platform (31) to swing left and right.

2. The drum for leaching according to claim 1, characterized in that: The driving roller frame (2) includes at least two groups of roller support frames (22), a base (23) is provided at the bottom of the roller support frame (22), a driver (21) is provided above the base (23), and the driver (21) drives the roller support frame (22) to drive the mixing cylinder (1) to rotate along the track (12).

3. The drum for leaching according to claim 1, characterized in that: A sealing cover (13) is provided on the outer side of the outer cylinder (11), and a sealing convex ring (15) is provided on the side of the sealing cover (13) close to the outer cylinder (11).

4. The drum for leaching according to claim 1, wherein: A fitting area (112) is provided on the outer cylinder (11) close to the sealing convex ring (15), and the sealing convex ring (15) is adapted to the fitting area (112) provided on the outer cylinder (11).

5. The drum for leaching according to claim 3, wherein: A sealing groove (14) is provided on the inner side of the sealing cover (13) close to the sealing convex ring (15), and the sealing groove (14) is adapted to a combined protrusion (16) provided at one end of the inner cylinder (111).

6. The drum for leaching according to claim 1, wherein: A spacer plate (17) is provided on the inner side of the inner cylinder (111), and the outer side of the spacer plate (17) is annularly arranged and adapted to the inner side of the inner cylinder (111).

7. The drum for leaching according to claim 1, wherein: A positioning cylinder (19) is provided at the inner bottom of the outer cylinder (11), and a positioning ring (110) is provided at the inner bottom of the inner cylinder (111), and the positioning ring (110) is adapted to the positioning cylinder (19).

8. The drum for leaching according to claim 1, wherein: A fixed distance is maintained between the inner cylinder (111) and the outer cylinder (11), and an immersion area (18) is provided at this fixed distance for filling the leaching liquid.

9. The drum for leaching according to claim 1, wherein: Through holes are provided on one side of both the outer cylinder (11) and the inner cylinder (111), and sealing blocks are provided at the through holes to facilitate the addition of the target object and the liquid.

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