A mixing and stirring device of a polyacrylamide reaction kettle for hydrometallurgy of laterite nickel ore

Abstract

This utility model discloses a mixing and stirring device for a polyacrylamide reactor used in the hydrometallurgical smelting of laterite nickel ore. The device includes a reactor body with a drive motor located at its bottom exterior. A vertically arranged stirring shaft is located inside the reactor body. A swirling guide ring is connected to the bottom of the stirring shaft. The swirling guide ring contains multiple sets of vortex mixing components composed of arched guide plates and vortex disturbance plates. A diffusion guide shroud is located at the upper end of the stirring shaft. The diffusion guide shroud contains multiple sets of diffusion mixing components composed of inclined guide plates and disturbance protrusions. Several main stirring blades are connected in a ring around the swirling guide ring and the diffusion guide shroud. This mixing and stirring device for the polyacrylamide reactor in the hydrometallurgical smelting of laterite nickel ore improves mixing uniformity and stirring efficiency, adapts to mixing requirements under complex working conditions, and thus significantly improves the performance of polyacrylamide.

Description

Technical Field

[0001] This utility model relates to the field of metallurgical equipment technology, specifically to a mixing and stirring device for a polyacrylamide reactor used in the hydrometallurgical smelting of laterite nickel ore. Background Technology

[0002] In the hydrometallurgical process of laterite nickel ore, a high-molecular-weight flocculant, namely polyacrylamide, is typically added to the slurry to effectively improve solid-liquid separation efficiency, thereby promoting the agglomeration and sedimentation of fine particles. This process is usually carried out in a dedicated reactor, where the mixing and stirring device is a key component to ensure that the polyacrylamide is thoroughly and uniformly mixed with the slurry. Good stirring helps to improve the efficiency of subsequent sedimentation and filtration processes, thus having a significant impact on the stability and economy of the entire smelting process.

[0003] Existing polyacrylamide reactors used in the hydrometallurgical process of laterite nickel ore mostly adopt traditional paddle or anchor-type stirring structures. Their stirring blades are relatively simple, and local eddies or blind zones are easily formed during the stirring process, resulting in insufficient mixing of polyacrylamide and slurry, which affects the flocculation effect. At the same time, traditional stirring devices are difficult to achieve uniform dispersion when the material viscosity is high or the density difference is large, which in turn affects the efficiency of subsequent processing and the stability of product quality. Utility Model Content

[0004] The purpose of this utility model is to provide a mixing and stirring device for a polyacrylamide reactor used in the hydrometallurgical process of laterite nickel ore, so as to solve the problems mentioned in the background art, such as uneven mixing, the existence of stirring blind zones, and difficulty in adapting to the mixing requirements of materials with high viscosity or large density differences.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a mixing and stirring device for a polyacrylamide reactor used in the hydrometallurgical process of laterite nickel ore, comprising a reactor body, a drive motor located on the top exterior of the reactor body, a vertically distributed stirring shaft located inside the reactor body, a swirling guide ring connected to the bottom end of the stirring shaft, multiple sets of vortex mixing components composed of arched guide plates and vortex disturbance plates located inside the swirling guide ring, a diffusion guide shroud located at the upper end of the stirring shaft, multiple sets of diffusion mixing components composed of inclined guide plates and disturbance protrusions located inside the diffusion guide shroud, and several main stirring blades connected in a ring around the swirling guide ring and the diffusion guide shroud.

[0006] Preferably, the main stirring blade has a strip-shaped wavy structure, and both the upper and lower ends of the main stirring blade are connected to the outer edge of the diffuser shroud and the swirl guide ring through elastic elements.

[0007] Preferably, the inner center of the swirl guide ring is provided with a lower connecting sleeve that is sleeved outside the stirring shaft, and the two ends of the arched guide plate are respectively connected to the outer wall of the lower connecting sleeve and the inner wall of the swirl guide ring, and the vortex disturbance plate is connected to the edges on both sides of the arched guide plate.

[0008] Preferably, two eddy current disturbance plates are provided on each side of the arched guide plate and are distributed at an inclined angle of 30°-60°.

[0009] Preferably, the diffuser shroud has an upper sleeve fitted around the outside of the stirring shaft at its inner center. The two ends of the inclined guide plate are connected to the inner wall of the diffuser shroud and the outer wall of the upper sleeve, respectively, and the turbulence protrusion is welded and fixed to the inner wall of the diffuser shroud.

[0010] Preferably, the turbulence protrusions are all located in the gaps between each pair of inclined guide plates, and there are two turbulence protrusions in the gaps between each group of inclined guide plates.

[0011] Compared with existing technologies, the beneficial effects of this invention are as follows: the mixing and stirring device of the polyacrylamide reactor for hydrometallurgical refining of laterite nickel ore improves mixing uniformity and stirring efficiency, effectively eliminates stirring blind zones, and adapts to the mixing requirements under complex working conditions, thereby significantly improving the performance of polyacrylamide. This device, through the design of the arched guide plate and vortex disturbance plate inside the swirl guide ring, enhances the multidirectional flow and turbulence intensity of the material during the stirring process, effectively eliminating stirring blind zones in traditional stirring structures. Simultaneously, the inclined guide plate and turbulence protrusions inside the diffusion guide hood further optimize the material flow direction, improving mixing uniformity and dispersion efficiency. The main stirring blade, combined with an elastic connection structure, increases the stirring coverage while adapting to the stirring requirements of materials with different viscosities. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the mixing and stirring device of a polyacrylamide reactor for hydrometallurgical processing of laterite nickel ore according to this utility model.

[0013] Figure 2 This is a schematic diagram of the internal structure of the diffusion guide hood of the mixing and stirring device of the polyacrylamide reactor for hydrometallurgical refining of laterite nickel ore according to this utility model.

[0014] Figure 3 This is a schematic diagram of the internal side view of the swirl guide ring structure of the mixing and stirring device of the polyacrylamide reactor for hydrometallurgical refining of laterite nickel ore according to this utility model.

[0015] Figure 4 This is a top view of the internal structure of the swirl guide ring of the mixing and stirring device of the polyacrylamide reactor for hydrometallurgical refining of laterite nickel ore according to this utility model.

[0016] In the figure: 1. Reactor body; 2. Drive motor; 3. Stirring shaft; 4. Swirl guide ring; 401. Arched guide plate; 402. Vortex disturbance plate; 5. Main stirring blade; 6. Diffusion guide hood; 601. Inclined guide plate; 602. Turbulence protrusion; 7. Elastic element; 8. Upper connecting sleeve; 9. Lower connecting sleeve. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1-4This utility model provides a technical solution: a mixing and stirring device for a polyacrylamide reactor used in the hydrometallurgical process of laterite nickel ore, comprising a reactor body 1, an inlet on one side of the top of the reactor body 1, and an outlet on one side of the bottom of the reactor body 1. A drive motor 2 is fixedly installed on the outside of the top of the reactor body 1 by bolts. A vertically distributed stirring shaft 3 is provided inside the reactor body 1. The output end of the drive motor 2 is connected to the bottom end of the stirring shaft 3 by a coupling. A swirling guide ring 4 is connected to the bottom end of the stirring shaft 3. The swirling guide ring 4 contains multiple sets of vortex mixing components composed of arched guide plates 401 and vortex disturbance plates 402. A diffusion guide hood 6 is provided at the upper end of the stirring shaft 3. The diffusion guide hood 6 is generally smaller at the top and larger at the bottom. The cone-shaped structure has its larger opening facing downwards. The diffuser shroud 6 contains multiple diffusion mixing components consisting of inclined guide plates 601 and turbulence protrusions 602. Several main stirring blades 5 are connected and arranged around the swirling guide ring 4 and the diffuser shroud 6. The drive motor 2 of this structure rotates the stirring shaft 3, causing the swirling guide ring 4 and the diffuser shroud 6 to rotate synchronously. At this time, the main stirring blades 5 are evenly distributed around the stirring shaft 3 between the swirling guide ring 4 and the diffuser shroud 6, rotating with it to form the main stirring power structure. Simultaneously, the arched guide plates 401 and vortex turbulence plates 402 inside the swirling guide ring 4 work together to guide the material to generate multidirectional flow during the stirring process, and enhance local turbulence through the vortex mixing components. The flow intensity is increased, breaking the local stable eddies or stirring blind zones that are easily formed in traditional stirring methods. At the same time, the inclined guide plate 601 inside the diffuser shroud 6, together with the turbulence protrusion 602, further guides and turbules the material, enabling the polyacrylamide solution and laterite nickel ore slurry to achieve more efficient and uniform dispersion and fusion during the stirring process. This solves the technical problems of uneven mixing, low stirring efficiency, and poor flocculation effect under conditions of high viscosity or large density difference caused by the simple stirring structure in the existing technology. The main stirring blade 5 has a strip-shaped wavy structure, and both the upper and lower ends of the main stirring blade 5 are connected to the outer edge of the diffuser shroud 6 and the swirling guide ring 4 through elastic elements 7. This structure of the wavy structure of the main stirring blade 5 can increase the stirring intensity during rotation. The mixing contact area is increased to enhance the shearing and pushing effect on the material. Simultaneously, its upper and lower ends are connected to the diffuser shroud 6 and the swirling guide ring 4 respectively via elastic elements 7. During the mixing process, the main stirring blade 5 is allowed to automatically fine-tune its angle and position according to the material resistance, thereby adapting to materials of different viscosities or flow states, reducing fluctuations in mixing resistance, and maintaining a stable mixing process. This not only improves the mixing coverage but also enhances the device's adaptability to complex working conditions. The swirling guide ring 4 has a lower connecting sleeve 9 sleeved outside the stirring shaft 3 at its internal center. The lower connecting sleeve 9 is fixed to the stirring shaft 3 by positioning pins, and the two ends of the arched guide plate 401 are respectively connected to the outer wall of the lower connecting sleeve 9 and the inner wall of the swirling guide ring 4. The connection is made by welding.The vortex disturbance plate 402 is connected to the edges on both sides of the arched guide plate 401. This structure forms a stable support structure between the outer wall of the lower connecting sleeve 9 and the inner wall of the vortex guide ring 4. During the mixing process, the material rotates with the stirring shaft 3 and enters the vortex guide ring 4. The arched guide plate 401 guides the flow direction of the material, enhancing its vortex effect. Simultaneously, the vortex disturbance plate 402 further breaks the laminar flow state as the material passes through, generating multi-directional turbulence and improving mixing efficiency. The vortex disturbance plate 402... Two arched guide plates 401 are provided on each side edge, and are inclined at an angle of 30°-60°. During the mixing process, when the material flows through the arched guide plates 401, it is continuously cut and disturbed by the vortex disturbance plates 402, effectively breaking the laminar boundary, exciting multi-directional micro-vortices, enhancing local turbulence intensity, and causing the material to form a more complex and orderly flow path inside the swirling guide ring 4, further improving mixing efficiency and uniformity. The diffuser shroud 6 has a sleeved design at its internal center. The upper connecting sleeve 8 outside the stirring shaft 3 is also fixed to the stirring shaft 3 by positioning pins. The two ends of the inclined guide plate 601 are connected to the inner wall of the diffuser shroud 6 and the outer wall of the upper connecting sleeve 8, respectively. The connection can be fixed by welding, and the turbulence protrusion 602 is welded to the inner wall of the diffuser shroud 6. In this structure, during the stirring process, the material enters the interior of the diffuser shroud 6 with the rotation of the main stirring blade 5 and the swirling guide ring 4. The inclined guide plate 601 guides the material, causing it to flow along the inner wall of the diffuser shroud 6. The cavity exhibits a spiral diffusion flow, enhancing the axial and radial mixing effect of the material. Simultaneously, the turbulence protrusions 602 further disrupt the stability of the material flow, increasing turbulence and promoting the full integration of polyacrylamide and the slurry. The turbulence protrusions 602 are all located in the gaps between pairs of inclined guide plates 601, with two protrusions 602 in each gap between sets of inclined guide plates 601. This structure allows the turbulence protrusions 602 to continuously disturb the laminar flow of the material, further disrupting the laminar flow state and enhancing the local turbulence.

[0019] Working principle: When using the mixing and stirring device of the polyacrylamide reactor for hydrometallurgical processing of laterite nickel ore, the laterite nickel ore slurry and polyacrylamide solution are first added into the reactor through the feed inlet at the top of the reactor body 1. Then, the drive motor 2 is started, and the drive motor 2 drives the stirring shaft 3 to rotate through the coupling. The stirring shaft 3 drives the swirling guide ring 4 and the diffuser guide hood 6 connected to its upper and lower ends to rotate synchronously. While the stirring shaft 3 rotates, several main stirring blades 5 rotate together with the stirring shaft 3, and their wave-shaped structure enhances the agitation of the material. Driven by the main stirring blade 5, the swirling guide ring 4, and the diffuser shroud 6, the material is continuously lifted and flows downward in a circular flow. When the arched guide plate 401 and the vortex disturbance plate 402 inside the swirling guide ring 4 come into contact with the material, they will initially disturb and guide the material. At the same time, when the inclined guide plate 601 and the disturbance protrusion 602 inside the diffuser shroud 6 come into contact with the material, they will further diffuse, guide, and disturb the material, effectively enabling the material to form a multi-directional circulating flow within the reactor body 1, thereby completing a series of tasks.

[0020] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. 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 mixing and stirring device for a polyacrylamide reactor used in the hydrometallurgical process of laterite nickel ore, comprising a reactor body (1), a drive motor (2) provided on the top exterior of the reactor body (1), and vertically distributed stirring shafts (3) provided inside the reactor body (1), characterized in that: The bottom end of the stirring shaft (3) is connected to a swirling guide ring (4). The interior of the swirling guide ring (4) is provided with multiple sets of vortex mixing components consisting of arched guide plates (401) and vortex disturbance plates (402). The upper end of the stirring shaft (3) is provided with a diffusion guide shroud (6). The interior of the diffusion guide shroud (6) is provided with multiple sets of diffusion mixing components consisting of inclined guide plates (601) and disturbance protrusions (602). Furthermore, several main stirring blades (5) are connected around the swirling guide ring (4) and the diffusion guide shroud (6).

2. The mixing and stirring device for a polyacrylamide reactor used in the hydrometallurgical smelting of laterite nickel ore according to claim 1, characterized in that: The main stirring blade (5) has a strip-shaped wave structure, and both the upper and lower ends of the main stirring blade (5) are connected to the outer edge of the diffuser shroud (6) and the swirling flow guide ring (4) through elastic elements (7).

3. The mixing and stirring device for a polyacrylamide reactor used in the hydrometallurgical smelting of laterite nickel ore according to claim 1, characterized in that: The swirling guide ring (4) has a lower connecting sleeve (9) sleeved outside the stirring shaft (3) at its inner center. The two ends of the arched guide plate (401) are respectively connected to the outer wall of the lower connecting sleeve (9) and the inner wall of the swirling guide ring (4). The vortex disturbance plate (402) is connected to the edges on both sides of the arched guide plate (401).

4. The mixing and stirring device for a polyacrylamide reactor used in the hydrometallurgical smelting of laterite nickel ore according to claim 3, characterized in that: Two eddy current disturbance plates (402) are provided on both sides of the arched guide plate (401) and are distributed at an angle of 30°-60°.

5. The mixing and stirring device for a polyacrylamide reactor used in the hydrometallurgical smelting of laterite nickel ore according to claim 1, characterized in that: The diffuser shroud (6) has an upper sleeve (8) fitted outside the stirring shaft (3) at its inner center. The two ends of the inclined guide plate (601) are connected to the inner wall of the diffuser shroud (6) and the outer wall of the upper sleeve (8), respectively. The turbulence protrusion (602) is welded and fixed to the inner wall of the diffuser shroud (6).

6. The mixing and stirring device for a polyacrylamide reactor used in the hydrometallurgical smelting of laterite nickel ore according to claim 5, characterized in that: The turbulence protrusions (602) are all located in the gaps between each pair of inclined guide plates (601), and there are two turbulence protrusions (602) in the gaps between each group of inclined guide plates (601).

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