Reductive leaching apparatus

Abstract

The utility model belongs to material processing technical field discloses reduction leaching device, it includes cauldron body, stirring shaft, injection pipe and stirring subassembly. The stirring shaft rotation is connected in cauldron body and has gas guide chamber, one end of stirring shaft is connected with driving piece, injection pipe sets up in cauldron body and from the other end of stirring shaft stretches into gas guide chamber, stirring subassembly sets up in stirring shaft and has a plurality of diffusion hole, diffusion hole is linked together with gas guide chamber to diffuse gas to cauldron body. Therefore this reduction leaching device when using, gas diffusion from diffusion hole can produce impact to material, so that material can produce certain vortex effect, reduce the possibility that material appears delamination or dead zone in cauldron body, reduce the possibility that gas gathers in local area simultaneously, reduce the probability that bubble group forms, be favorable to gas even diffusion to cauldron body inside, in this way just effectively improve the contact degree of material and gas, be favorable to reaction fully carries out, thereby effectively improve leaching efficiency.

Description

Technical Field

[0001] This utility model relates to the field of material processing technology, and in particular to a reduction leaching device. Background Technology

[0002] High-pressure reduction leaching (HPRL) is an important hydrometallurgical technology that plays a crucial role in processing complex ores and recovering valuable metals. This process utilizes a reducing agent under high pressure to reduce metal oxides in the ore to a soluble state, thereby achieving efficient metal leaching.

[0003] In existing technologies, the stirring shaft in the reactor used in high-pressure reduction leaching processes is generally driven by a motor and connected to a stirring paddle via a coupling. The stirring paddle is mostly composed of straight blades or turbine blades, rotating at a certain speed within the reactor to agitate the materials. The gas injection structure typically involves a gas distribution pipe installed at the bottom or side wall of the reactor, with several small holes through which gas enters the reactor interior.

[0004] However, this agitator can only generate limited flow patterns during the mixing process, easily leading to stratification or dead zones within the reactor, especially near the reactor wall and bottom. Material flow is slow in these areas, making it difficult to fully mix with the reducing agent. Furthermore, the lack of an effective guidance and dispersion mechanism for gas entering the reactor causes it to accumulate in localized areas, forming bubble clusters. This prevents uniform dispersion throughout the reactor, resulting in some ore particles failing to fully contact the reducing agent, leading to incomplete reaction and low leaching efficiency. Utility Model Content

[0005] The purpose of this invention is to provide a reductive leaching device that solves the problem of poor stirring and gas injection effects in existing reductive leaching devices, which leads to insufficient reaction and low leaching efficiency.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] This utility model embodiment provides a reductive leaching apparatus, which includes:

[0008] The vessel body;

[0009] A stirring shaft is rotatably connected to the vessel body and has a gas guiding chamber; one end of the stirring shaft is connected to a driving component.

[0010] An injection pipe is installed inside the vessel and extends into the gas guide chamber from the other end of the stirring shaft. The injection pipe is connected to the injection equipment through an injection connector.

[0011] A stirring assembly is disposed on the stirring shaft and has multiple diffusion holes, which are connected to the gas guiding chamber to diffuse gas into the vessel body.

[0012] Optionally, the stirring assembly includes:

[0013] Multiple first stirring blades are spaced apart along the length of the stirring shaft. Each first stirring blade has a guiding air channel communicating with the air guiding cavity. Multiple diffusion holes are spaced apart on the surface of the first stirring blade, and the diffusion holes are communicating with the guiding air channel.

[0014] Optionally, a plurality of the first stirring blades are staggered and distributed on opposite sides of the stirring shaft.

[0015] Optionally, the stirring assembly further includes:

[0016] Multiple second stirring blades are distributed at intervals along the length of the stirring shaft, and the length of the second stirring blades is less than the length of the first stirring blade.

[0017] Optionally, the second stirring paddle has multiple material passage holes.

[0018] Optionally, the air injection pipe has multiple vent holes spaced apart.

[0019] Optionally, along the extension direction of the air injection pipe, the distance between two adjacent vent holes on one side closer to the air injection connector is greater than the distance between two adjacent vent holes on the other side.

[0020] Optionally, a baffle is fixedly provided on the inner wall of the vessel.

[0021] Optionally, the baffle is provided with multiple material passage holes.

[0022] Optionally, a support frame is fixedly provided on the inner wall of the vessel, and the support frame is rotatably connected to the end of the stirring shaft away from the driving component.

[0023] The beneficial effects of this utility model are:

[0024] In the reductive leaching process, after the raw materials are sequentially added to the reactor, a drive unit rotates the stirring shaft. During rotation, a gas injection device continuously injects gas into the gas injection pipe through the gas injection connector. The gas is then guided into the gas guide chamber of the stirring shaft through the gas injection pipe, and then diffuses into the reactor through multiple diffusion holes. Therefore, in use, this reductive leaching device not only stirs the material but also diffuses the gas through multiple diffusion holes. On the one hand, the gas diffuses through the diffusion holes, impacting the material and creating a vortex effect, thereby increasing the material flow rate and reducing the possibility of stratification or dead zones within the reactor. On the other hand, it reduces the possibility of gas accumulation in localized areas, lowering the probability of bubble formation and facilitating uniform gas diffusion into the reactor. This effectively increases the degree of contact between the material and the gas, promoting a complete reaction and thus significantly improving leaching efficiency. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the internal structure of the reduction leaching device in an embodiment of this utility model;

[0026] Figure 2 This is a cross-sectional view of the structure of the stirring shaft of the reduction leaching device in this embodiment of the present invention;

[0027] Figure 3 This is a schematic diagram of the structure of the stirring shaft and stirring assembly of the reduction leaching device in this embodiment of the present invention.

[0028] In the picture:

[0029] 1. Kettle body; 11. Inlet; 12. Outlet; 13. Kettle cover; 2. Stirring shaft; 21. Air guide chamber; 22. Drive component; 3. Air injection pipe; 31. Air injection connector; 32. Exhaust port; 4. Stirring assembly; 41. Diffuser hole; 42. First stirring paddle; 43. Second stirring paddle; 44. Material passage hole; 5. Baffle; 51. Material passage hole; 6. Support frame. Detailed Implementation

[0030] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0031] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0033] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device 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 utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0034] This utility model discloses a reduction leaching apparatus.

[0035] Reference Figures 1 to 3 The reduction leaching device includes a vessel body 1, a stirring shaft 2, a gas injection pipe 3, and a stirring assembly 4. The stirring shaft 2 is rotatably connected to the vessel body 1 and has a gas guiding chamber 21. One end of the stirring shaft 2 is connected to a drive component 22. The gas injection pipe 3 is disposed inside the vessel body 1 and extends into the gas guiding chamber 21 from the other end of the stirring shaft 2. The gas injection pipe 3 is connected to a gas injection device through a gas injection connector 31. The stirring assembly 4 is disposed on the stirring shaft 2 and has multiple diffusion holes 41. The diffusion holes 41 are connected to the gas guiding chamber 21 to diffuse gas into the vessel body 1.

[0036] Specifically, the side wall of the vessel body 1 is provided with a feed inlet 11, and the bottom wall is provided with a discharge outlet 12. The top wall of the vessel body 1 is provided with a vessel cover 13 to seal the vessel body 1. A mounting bracket is provided on the cover, and a servo motor as a drive component 22 is fixedly mounted on the mounting bracket. The output end of the drive component 22 is fixedly connected to the upper end of the stirring shaft 2 through a coupling to drive the stirring shaft 2 to rotate. The lower end of the stirring shaft 2 passes through the vessel cover 13 and extends into the interior of the vessel body 1. The interior of the stirring shaft 2 is hollow and serves as a gas guide chamber 21. A through hole is opened on the lower end face of the stirring shaft 2 for the insertion of a gas injection pipe 3. The lower end of the gas injection pipe 3 is connected to a gas injection connector 31 located on the outside of the vessel body 1. The gas injection connector 31 is connected to a gas injection device through a pipeline. The gas injection device can continuously provide gas at a specified pressure, such as oxygen or air. A stirring assembly 4 is provided on the stirring shaft 2. The stirring assembly 4 can be rod-shaped or plate-shaped. It can extend in a direction intersecting the axial direction of the stirring shaft 2 and has multiple diffusion holes 41 on its surface. The stirring assembly 4 is provided with a passage so that the multiple diffusion holes 41 can communicate with the air guide cavity 21.

[0037] In the reductive leaching process, after the raw materials are sequentially added into the vessel body 1, the driving component 22 drives the stirring shaft 2 to rotate. During rotation, the gas injection device continuously injects gas into the gas injection pipe 3 through the gas injection connector 31. The gas is then guided from the gas injection pipe 3 into the gas guide chamber 21 of the stirring shaft 2, and then diffuses into the vessel body 1 through multiple diffusion holes 41. Therefore, when this reductive leaching device is in use, the stirring component 4 can not only stir but also diffuse the gas through multiple diffusion holes 41. On the one hand, the gas diffuses through the diffusion holes 41 and impacts the material, causing a certain vortex effect, thereby increasing the material flow rate and reducing the possibility of stratification or dead zones in the vessel body 1. On the other hand, it reduces the possibility of gas accumulation in local areas, lowers the probability of bubble formation, and facilitates the uniform diffusion of gas into the interior of the vessel body 1. This effectively improves the degree of contact between the material and the gas, promotes a complete reaction, and thus effectively improves the leaching efficiency.

[0038] Optionally, the stirring assembly 4 includes a plurality of first stirring blades 42. The plurality of first stirring blades 42 are spaced apart along the length of the stirring shaft 2. Each first stirring blade 42 has a guide air channel communicating with the air guide chamber 21. A plurality of diffusion holes 41 are spaced apart on the surface of the first stirring blade 42, and the diffusion holes 41 are communicating with the guide air channel.

[0039] Specifically, multiple through holes communicating with the air guide chamber 21 are opened through the side wall of the stirring shaft 2. A first stirring paddle 42 is provided at each through hole. The first stirring paddle 42 is rod-shaped and extends in a direction perpendicular to the axial direction of the stirring shaft 2. The interior of the first stirring paddle 42 is hollow to serve as an air guide channel, and through holes are opened on the side wall of the first stirring paddle 42 as diffusion holes 41. Multiple diffusion holes 41 can be distributed at intervals along the length and circumference of the first stirring paddle 42. The specific number and size of diffusion holes 41 can be designed according to the actual size of the first stirring shaft 2, and this utility model does not limit them.

[0040] By setting multiple first stirring paddles 42, the stirring shaft 2 can drive the multiple first stirring paddles 42 to rotate synchronously to stir the material. During the stirring process, gas can be ejected from the diffusion hole 41 of each first stirring paddle 42 so that the gas is evenly distributed in the vessel body 1. At the same time, the ejected gas can also generate a certain impact on the material, thereby successfully forming a vortex effect in the material, so as to effectively improve the stirring and mixing effect of the material.

[0041] Optionally, multiple first stirring blades 42 are staggered on opposite sides of the stirring shaft 2.

[0042] Specifically, multiple first stirring paddles 42 are spaced apart on both opposite sides of the stirring shaft 2, and the multiple first stirring paddles 42 on both sides of the stirring shaft 2 are staggered, that is, the first stirring paddle 42 on one side is located between two adjacent first stirring paddles 42 on the other side. This makes the multiple stirring paddles asymmetrically arranged, so that the stirring paddles can stir different areas of the material when rotating, thereby further improving the stirring effect. The number of first stirring paddles 42 on each side of the stirring shaft 2 can be designed according to the length of the stirring shaft 2, and this utility model does not limit it.

[0043] Optionally, the stirring assembly 4 further includes a plurality of second stirring blades 43. The plurality of second stirring blades 43 are spaced apart along the length direction of the stirring shaft 2, and the length of the second stirring blades 43 is less than the length of the first stirring blade 42.

[0044] Specifically, first stirring blades 42 are distributed on the left and right sides of the stirring shaft 2, while multiple second stirring blades 43 are distributed on the front and rear sides of the stirring shaft 2. The second stirring blades 43 can be plate-shaped, and their length is less than the length of the first stirring blades 42. The specific relative lengths of the two can be designed according to the actual size of the vessel body 1, and this utility model does not impose any limitations.

[0045] By setting a shorter second stirring blade 43, which works in conjunction with the first stirring blade 42 to drive the movement of the surrounding materials, different flow fields are formed, which can further reduce the possibility of the occurrence of stirring dead zones and thus effectively improve the mixing effect.

[0046] Optionally, the second stirring paddle 43 has multiple material passage holes 44 through it.

[0047] Specifically, the material passage hole 44 allows the material to pass through during the mixing process. When the material passes through, the flow velocity and direction change abruptly, thereby breaking the laminar flow state and effectively improving the mixing effect. At the same time, the material passage hole 44 reduces the contact area between the second stirring paddle 43 and the material, reducing fluid resistance and thus reducing energy consumption during the mixing process, improving energy-saving effect.

[0048] Optionally, the air injection pipe 3 has multiple vent holes 32 spaced apart.

[0049] Specifically, the air injection pipe 3 extends along the length of the stirring shaft 2, and the top of the air injection pipe 3 is higher than all the first stirring blades 42. Multiple through holes are opened on the surface of the air injection pipe 3 as exhaust holes 32. The multiple exhaust holes 32 can be distributed at intervals in the direction of gas flow. The specific number of exhaust holes 32 can be designed according to the length of the air injection pipe 3, and this utility model does not limit it.

[0050] By setting multiple exhaust holes 32, the gas can be evenly diffused in the gas guide chamber 21, so that the gas can be evenly entered into multiple first stirring paddles 42 and then diffused into the vessel body 1 through the diffusion holes 41, thereby further improving the uniformity of gas diffusion.

[0051] Optionally, along the extension direction of the air injection pipe 3, the distance between two adjacent vent holes 32 on the side closer to the air injection connector 31 is greater than the distance between two adjacent vent holes 32 on the other side.

[0052] Specifically, the density of the vent holes 32 increases along the ascending direction of the injection pipe 3, so that fewer vent holes 32 are provided in the injection pipe 3 near the injection connector 31, while more vent holes 32 are provided in the area away from the injection connector 31. Thus, when gas enters the vent pipe through the injection connector 31, some gas can be discharged from the vent holes 32 near the injection connector 31, while the remaining gas can be guided to the end of the injection pipe 3 away from the injection connector 31, keeping the exhaust volume at both ends of the injection pipe 3 similar, thereby further improving the uniformity of gas diffusion.

[0053] Optionally, a baffle 5 is fixedly installed on the inner wall of the vessel body 1.

[0054] Specifically, multiple baffles 5 are spaced apart on the inner wall of the vessel body 1. The baffles 5 are long strips and extend vertically. One side of the baffle 5 can be welded and fixed to the inner wall of the vessel body 1, while the other side can maintain a certain gap with the first stirring paddle 42 to avoid interference with the first stirring paddle 42.

[0055] By setting baffle 5, the flow rate and direction of the material can be changed during the mixing process, so that the material not only moves along the circumference of the vessel 1, but also moves along the height of the vessel 1, so that the mixed material can be mixed together more effectively, thereby improving the mixing effect.

[0056] Optionally, the baffle 5 has multiple material passage holes 51 through it.

[0057] Specifically, the opening of the through holes allows the material to pass through the filter holes during the stirring process, and its flow rate and direction will change, thereby forming more vortices to further enhance the mixing effect.

[0058] Optionally, a support frame 6 is fixedly provided on the inner wall of the vessel body 1, and the support frame 6 is rotatably connected to the end of the stirring shaft 2 away from the driving component 22.

[0059] Specifically, a support frame 6 is fixed to the inner bottom wall of the vessel body 1. The fixing can be achieved by welding or screw connection. A bearing is provided at the upper end of the support frame 6, and the lower end of the stirring shaft 2 is rotatably connected to the bearing. In this way, the lower end of the stirring shaft 2 is restricted by the support frame 6, so that both the upper and lower ends of the stirring shaft 2 are limited, thereby improving the stability of the stirring shaft 2 during rotation and ensuring stable rotation of the stirring shaft 2.

[0060] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A reductive leaching apparatus, characterized in that, include: The vessel body (1); A stirring shaft (2) is rotatably connected inside the vessel body (1) and has a gas guide chamber (21). One end of the stirring shaft (2) is connected to a drive component (22). The gas injection pipe (3) is located inside the vessel body (1) and extends into the gas guide chamber (21) from the other end of the stirring shaft (2). The gas injection pipe (3) is connected to the gas injection equipment through the gas injection connector (31). A stirring assembly (4) is disposed on the stirring shaft (2) and has a plurality of diffusion holes (41), the diffusion holes (41) being connected to the gas guide cavity (21) to diffuse gas into the vessel body (1).

2. The reductive leaching apparatus according to claim 1, characterized in that, The stirring assembly (4) includes: Multiple first stirring blades (42) are spaced apart along the length of the stirring shaft (2). Each first stirring blade (42) has a guide flow channel communicating with the air guide cavity (21). Multiple diffusion holes (41) are spaced apart on the surface of the first stirring blade (42). The diffusion holes (41) are communicating with the guide flow channel.

3. The reductive leaching apparatus according to claim 2, characterized in that, Multiple first stirring blades (42) are staggered on opposite sides of the stirring shaft (2).

4. The reductive leaching apparatus according to claim 2, characterized in that, The stirring assembly (4) also includes: Multiple second stirring paddles (43) are spaced apart along the length of the stirring shaft (2), and the length of the second stirring paddles (43) is less than the length of the first stirring paddle (42).

5. The reductive leaching apparatus according to claim 4, characterized in that, The second stirring paddle (43) has multiple material passage holes (44) through it.

6. The reductive leaching apparatus according to claim 1, characterized in that, The air injection pipe (3) has multiple exhaust holes (32) spaced apart.

7. The reductive leaching apparatus according to claim 6, characterized in that, Along the extension direction of the air injection pipe (3), the distance between two adjacent exhaust holes (32) on the side closer to the air injection connector (31) is greater than the distance between two adjacent exhaust holes (32) on the other side.

8. The reductive leaching apparatus according to any one of claims 1 to 7, characterized in that, A baffle (5) is fixedly installed on the inner wall of the vessel body (1).

9. The reductive leaching apparatus according to claim 8, characterized in that, The baffle (5) has multiple material passage holes (51) through it.

10. The reductive leaching apparatus according to any one of claims 1 to 7, characterized in that, A support frame (6) is fixedly installed on the inner wall of the vessel body (1), and the support frame (6) is rotatably connected to the end of the stirring shaft (2) away from the driving member (22).

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