Rare earth middling desliming tank of strong magnetic separator

Abstract

The utility model discloses a strong magnetic machine rare earth middling desliming tank which comprises a tank body, an ore inlet end is arranged on one side of the tank body, a discharging end is arranged on the other side of the tank body, an ore inlet pipe is fixed to the top of the tank wall, located at the ore inlet end, of the tank body, and a spoiler is installed on the inner wall, located at the bottom of the ore inlet pipe, of the tank body. A grate plate is mounted in the ore feeding end of the tank body, a slag discharging opening is formed in the bottom wall of the tank body and located at the grate plate, a vibration exciter is fixed to one side of the top of the grate plate, an overflow pipe is connected to one side of the top of the tank body, a discharging opening is formed in the center of the bottom of the tank body, and a cross beam is fixed to the center of the top of the tank body; a lifting screw rod is in threaded connection with the center of the cross beam, a material blocking plug is fixed to the bottom end of the lifting screw rod, a hand wheel is fixed to the top of the lifting screw rod, fine silt particles in strong magnetic middlings are effectively removed by means of the specific gravity difference and the scattering effect of a spoiler, and rare earth minerals can be used as middlings to be returned and re-separated or directly become qualified concentrates.

Description

Technical Field

[0001] This utility model belongs to the field of mineral screening technology, specifically relating to a strong magnetic rare earth desliming tank. Background Technology

[0002] In the field of rare earth resource comprehensive recovery, current production lines mainly target the reprocessing of tailings from upstream rare earth flotation processes and tailings from the Wolter II series weak magnetic separation, aiming to improve the utilization rate of mineral resources. These raw materials generally exhibit significant characteristics such as low ore grade and high mud content. As a result, the middlings generated during the high-intensity magnetic separation process have two prominent problems: firstly, severe mud entrainment, with fine particles easily forming mechanical inclusions or physical adsorption with magnetic minerals; and secondly, significantly low grade, far below the requirements for concentrate quality.

[0003] Directly incorporating such muddy ores into the concentrate system dilutes the final product grade and reduces economic efficiency; discharging them into tailings leads to the loss of valuable metals and a decrease in resource recovery; returning them to the high-intensity magnetic separator for further separation results in the mud interfering with the magnetic field and increasing the viscosity of the slurry, thus deteriorating the equipment's separation efficiency and creating a vicious cycle. The existing process lacks targeted pretreatment methods, making it difficult to effectively remove mud and residual reagents, which has become a key bottleneck restricting the improvement of separation performance.

[0004] Therefore, there is an urgent need to develop an efficient pretreatment and desliming device before the middlings from the high-intensity magnetic separator enter the subsequent processing stage. This device can retain fine mud through physical separation, reduce the viscosity of the slurry, create favorable conditions for the re-enrichment or rational diversion of middlings, and ultimately achieve synergistic optimization of resource recovery rate and product quality. Utility Model Content

[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-strength magnetic rare earth ore desliming tank, comprising a tank body, an inlet end provided on one side of the tank body, and a outlet end provided on the other side of the tank body. An inlet pipe is fixed to the top of the tank body at the inlet end. A flow disruptor is installed on the inner wall of the tank body at the bottom of the inlet pipe. A grate is installed inside the tank body at the inlet end, and a slag discharge port is opened at the grate on the bottom wall of the tank body. A vibrator is fixed to one side of the top of the grate. An overflow pipe is connected to one side of the top of the tank body. A discharge port is opened at the center of the bottom of the tank body. A crossbeam is fixed to the center of the top of the tank body. A lifting screw is threadedly connected to the center of the crossbeam. A plug is fixed to the bottom of the lifting screw. A handwheel is fixed to the top of the lifting screw.

[0006] As a preferred technical solution of this utility model, one side of the grate is provided with a water-facing surface, and the other side of the grate is provided with a water-repellent surface. The grate is inclined and the water-facing surface faces the liquid surface of the tank.

[0007] As a preferred embodiment of this utility model, the bottom wall of the tank has an inverted conical cross-section, and the discharge port is located at the center of the inverted conical bottom wall of the tank.

[0008] As a preferred technical solution of this utility model, the turbulence device includes a central feed cylinder, the top of the central feed cylinder is provided with a slurry inlet, the bottom of the central feed cylinder is uniformly provided with water outlets, and the outer wall of the central feed cylinder is uniformly fixed with guide vanes. The water outlets and guide vanes correspond one-to-one and are arranged in a circle around the central feed cylinder.

[0009] As a preferred embodiment of this utility model, a support is fixed to the top of the central feed cylinder, and the central feed cylinder is fixed to the inner wall of the tank through the support.

[0010] As a preferred embodiment of this utility model, the inner wall of the tank is provided with insertion rails on both sides of the grate, and the two sides of the grate are fixed to the insertion rails by insertion.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] (1) This utility model effectively removes fine mud particles from the strong magnetic middlings by means of the difference in specific gravity and the dispersing effect of the turbulent device, so that rare earth minerals can be returned as middlings for re-selection or directly become qualified concentrates, thereby improving resource utilization. At the same time, it reduces the magnetic field interference and viscosity effect of the mud on subsequent strong magnetic machines and other equipment, improves sorting efficiency, reduces equipment wear and reduces production energy consumption.

[0013] (2) By adjusting the height of the clogging plug through the lifting screw, the amount of fine mud discharged and the speed of concentrate discharge can be precisely controlled, adapting to different ore properties, flexibly adjusting the final product grade, and ensuring economic benefits; the vibrator can clean the sludge attached to the grate surface in real time, and combined with the self-cleaning characteristics of the inclined grate structure, it reduces the risk of clogging, extends the equipment maintenance cycle, realizes non-stop operation, and improves production efficiency; the guide vane design of the turbulence device can stabilize the slurry flow state, avoid bottom disturbance caused by the impact of the ore inlet, provide a stable environment for gravity settling, and ensure the consistency and reliability of the separation effect. Attached Figure Description

[0014] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0015] Figure 1 This is a cross-sectional view of the tank body in this utility model;

[0016] Figure 2 This is a three-dimensional view of the turbulence generator in this utility model;

[0017] Figure 3 This is a top view of the spoiler in this utility model;

[0018] In the diagram: 1. Tank; 2. Inlet end; 3. Outlet end; 4. Inlet pipe; 5. Baffle; 6. Grate; 7. Vibrator; 8. Discharge port; 9. Crossbeam; 10. Lifting screw; 11. Blocking plug; 12. Handwheel; 13. Water-facing side; 14. Water-repellent side; 15. Central feed cylinder; 16. Slurry inlet; 17. Water outlet; 18. Guide vane; 19. Support; 20. Insertion rail; 21. Overflow pipe; 22. Slag discharge port. Detailed Implementation

[0019] 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.

[0020] Example

[0021] Please see Figure 1-3 This utility model provides the following technical solution: a high-strength magnetic rare earth ore desliming tank, including a tank body 1, an inlet end 2 on one side of the tank body 1, and a discharge end 3 on the other side of the tank body 1. An inlet pipe 4 is fixed to the top of the tank body 1 at the inlet end 2. A flow deflector 5 is installed on the inner wall of the tank body 1 at the bottom of the inlet pipe 4. A grate plate 6 is installed inside the tank body 1 at the inlet end 2, and a slag discharge port 22 is opened at the grate plate 6 on the bottom wall of the tank body. A vibrator 7 is fixed to one side of the top of the grate plate 6. An overflow pipe 21 is connected to one side of the top of the tank body 1. A discharge port 8 is opened at the center of the bottom of the tank body 1. A crossbeam 9 is fixed to the center of the top of the tank body 1. A lifting screw 10 is threadedly connected to the center of the crossbeam 9. A plug 11 is fixed to the bottom of the lifting screw 10. A handwheel 12 is fixed to the top of the lifting screw 10.

[0022] In order to reduce the adhesion of sludge to the surface of the plate and to use the inclined structure to allow the detached impurities to slide down along the water-facing surface 13 to avoid contaminating the concentrate at the discharge port 8, in this embodiment, as a preferred technical solution of the present invention, a water-facing surface 13 is provided on one side of the grate plate 6 and a back-water surface 14 is provided on the other side of the grate plate 6, and the grate plate 6 is inclined, with the water-facing surface 13 facing the liquid surface of the tank 1.

[0023] In order to guide the sedimented rare earth concentrate particles to gather at the center of the bottom of the tank 1, so as to facilitate their centralized discharge from the discharge port 8, improve the concentrate collection efficiency and reduce residue, in this embodiment, as a preferred technical solution of the present invention, the bottom wall of the tank 1 has an inverted conical structure, and the discharge port 8 is opened at the center of the bottom wall of the inverted conical tank 1.

[0024] In order to completely break up the mechanical inclusions and physical adsorption of sludge and magnetic minerals, and at the same time guide the slurry to spread evenly in the circumferential direction through the guide vanes 18, so as to avoid the slurry directly hitting the bottom of the tank 1 and disturbing the settled particles, in this embodiment, as a preferred technical solution of the present invention, the turbulence device 5 includes a central feed cylinder 15, a slurry inlet 16 is provided at the top of the central feed cylinder 15, and water outlets 17 are evenly opened at the bottom of the central feed cylinder 15. Guide vanes 18 are evenly fixed on the outer wall of the central feed cylinder 15. The water outlets 17 and the guide vanes 18 correspond one-to-one and are arranged in a circle around the central feed cylinder 15.

[0025] In order to ensure that the central feed cylinder 15 remains stable under the impact of slurry, avoid positional displacement due to vibration or impact, and ensure the working effect of the turbulence device, in this embodiment, as a preferred technical solution of the present invention, a support 19 is fixed to the top of the central feed cylinder 15, and the central feed cylinder 15 is fixed to the inner wall of the tank 1 by the support 19.

[0026] In order to achieve quick disassembly, replacement and maintenance of the grate plate 6, reduce the difficulty of maintenance and improve the efficiency of equipment maintenance, in this embodiment, as a preferred technical solution of the present utility model, the inner wall of the tank body 1 is provided with plug-in rails 20 on both sides of the grate plate 6, and the grate plate 6 is fixed in the plug-in rails 20 by plugging.

[0027] In summary, with the help of the above-mentioned technical solution of this utility model, the strong magnetic rare earth ore desliming tank is based on the fact that fine mud has a low specific gravity (2g / cm³). 3 Rare earth concentrate has a high specific gravity (4.2 g / cm³). 3 Based on the physical properties of minerals, a combination of gravity sedimentation and physical separation is used to achieve efficient separation of mineral slime and rare earth minerals. The specific process is as follows:

[0028] The slurry is transported to the inlet end 2 of the tank 1 via the inlet pipe 4, and first enters the central feed cylinder 15 of the baffle 5. The central feed cylinder 15 is fixed to the inner wall of the tank 1 by a top support 19. It has a slurry inlet 16 at its top, and outlets 17 evenly distributed at the bottom of the cylinder. Guide vanes 18 are evenly fixed to the outer wall, with each outlet 17 corresponding to a different guide vane 18 and arranged circumferentially around the central feed cylinder 15. When the slurry is discharged from the outlet 17, it precisely impacts the surface of the corresponding guide vane 18, using the impact force to thoroughly break up the mechanical inclusions and physical adsorption of the sludge and magnetic minerals. Simultaneously, the guide vanes 18 guide the slurry to diffuse evenly along the circumference, preventing the slurry from the inlet pipe 4 from directly impacting the bottom of the tank 1 and preventing the settled, filtered large particles and heavy rare earth concentrate from being disturbed.

[0029] After the slurry enters the tank 1, the fine mud particles with a smaller specific gravity flow upward with the slurry and are eventually discharged through the overflow pipe 21 on one side of the top of the tank 1; the rare earth concentrate particles with a larger specific gravity settle downward under the action of gravity, flow towards the bottom wall of the tank 1 which has an inverted cone structure, and gather towards the center, and are finally discharged into the concentrate area through the discharge port 8.

[0030] A grate plate 6 is installed inside the ore inlet end 2 of the tank body 1. The inner wall of the tank body 1 is provided with plug-in rails 20 on both sides of the grate plate 6. The grate plate 6 is fixed in the plug-in rails 20 by plugging in. This installation structure facilitates quick disassembly and replacement. One side of the grate plate 6 is the water-facing side 13 and the other side is the water-repellent side 14. The whole is inclined, and the water-facing side 13 faces the liquid surface of the tank body 1. The aperture of the grate plate 6 is optimized so that it can block large impurities and insufficiently dispersed mineral clumps from entering the settling area of ​​the discharge end 3, while allowing the rare earth concentrate particles to pass through.

[0031] A vibrator 7 is fixed to one side of the top of the grate plate 6. The vibrator 7 generates mechanical vibration force by adjusting the vibration frequency according to the degree of sludge adhesion through high-frequency vibration. This vibration force is transmitted along the body of the grate plate 6 to the entire plate. When fine mud or impurities in the slurry adhere to or clog the surface of the grate plate 6, the high-frequency vibration can cause the grate plate 6 to undergo periodic displacement. The inertial force generated by the vibration breaks the adsorption and friction between the sludge and the plate, causing the adhered sludge and impurities to fall off from the water-facing surface 13. Since the grate plate 6 is inclined, the fallen sludge slides down the water-facing surface 13 under the action of gravity to the area near the slag discharge port 22 on the bottom wall of the tank 1, and is discharged through the slag discharge port 22, preventing impurities from entering the discharge port 8 and contaminating the concentrate. At the same time, the continuous vibration of the vibrator 7 can prevent the slurry from forming static accumulation on the surface of the grate plate 6, keeping the filter gaps of the grate plate 6 unobstructed, and ensuring that qualified rare earth particles in the slurry can pass smoothly through the grate plate 6 and enter the settling area.

[0032] Finally, by rotating the handwheel 12 to drive the lifting screw 10 to rotate, the gap between the plug 11 and the discharge port 8 can be adjusted, thereby controlling the discharge speed of rare earth concentrate and the overflow ratio of fine mud, and achieving precise control of the grade of the separated mineral products.

[0033] Finally, it should be noted that, in this utility model, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," 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 connection 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 utility model according to the specific circumstances.

[0034] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model 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 utility model should be included within the protection scope of the present utility model.

Claims

1. A high-intensity magnetic rare earth ore desliming tank, comprising a tank body (1), characterized in that: The trough (1) has an inlet end (2) on one side and an outlet end (3) on the other side. An inlet pipe (4) is fixed to the top of the trough (1) at the inlet end (2). A flow deflector (5) is installed on the inner wall of the trough (1) at the bottom of the inlet pipe (4). A grate (6) is installed inside the trough (1) at the inlet end (2), and a slag discharge port (22) is opened on the bottom wall of the trough (1) at the grate (6). A vibrator (7) is fixed on one side of the top of the grate plate (6), an overflow pipe (21) is connected to one side of the top of the trough (1), a discharge port (8) is opened at the center of the bottom of the trough (1), a crossbeam (9) is fixed at the center of the top of the trough (1), a lifting screw (10) is threadedly connected at the center of the crossbeam (9), a plug (11) is fixed at the bottom of the lifting screw (10), and a handwheel (12) is fixed at the top of the lifting screw (10).

2. The desliming tank for rare earth ore from a strong magnetic magnet as described in claim 1, characterized in that: The grate (6) has a water-facing surface (13) on one side and a water-repellent surface (14) on the other side. The grate (6) is inclined and the water-facing surface (13) faces the liquid surface of the tank (1).

3. The desliming tank for rare earth ore from a strong magnetic magnet as described in claim 1, characterized in that: The bottom wall of the tank (1) has an inverted conical cross-section, and the discharge port (8) is located at the center of the bottom wall of the inverted conical tank (1).

4. The desliming tank for rare earth ore from a strong magnetic field as described in claim 1, characterized in that: The turbulence generator (5) includes a central feed cylinder (15), the top of which is provided with a slurry inlet (16), and the bottom of the central feed cylinder (15) is uniformly provided with water outlets (17). The outer wall of the central feed cylinder (15) is uniformly fixed with guide vanes (18). The water outlets (17) and guide vanes (18) correspond one-to-one and are arranged in a circle around the central feed cylinder (15).

5. A high-strength magnetic rare earth ore desliming tank according to claim 4, characterized in that: The top of the central feed cylinder (15) is fixed with a support (19), and the central feed cylinder (15) is fixed to the inner wall of the tank (1) by the support (19).

6. The desliming tank for rare earth ore from a strong magnetic field according to claim 2, characterized in that: The inner wall of the trough (1) is provided with insertion rails (20) on both sides of the grate (6), and the grate (6) is fixed in the insertion rails (20) by insertion.

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