Special horizontal screw centrifuge for rare earth separation

Abstract

The horizontal screw centrifuge special for rare earth separation comprises a housing, a rotating drum is rotatably connected in the housing, a spiral material pushing rod is coaxially arranged in the rotating drum, the rotating drum and the spiral material pushing rod are conical and are rotatably connected, the screw pitch of blades on the spiral material pushing rod is gradually reduced from the large end to the small end, one end of a feeding pipe extends out of the housing, and the other end of the feeding pipe extends out of the housing. The other end of the feeding pipe extends into the spiral pushing rod, a discharging opening communicated with the feeding pipe is formed in the outer wall of the spiral pushing rod, an overflow opening is formed in the end face of the large end of the rotary drum, a liquid discharging opening communicated with the overflow opening is formed in the bottom end of the housing, and a discharging opening is formed in the small end of the rotary drum. And a solid discharge hole communicated with the discharge hole is formed in the bottom end of the housing. Due to the high viscosity of the rare earth solution, the blades of the spiral pushing rod adopt a variable pitch structure, the pitch is gradually reduced from the large end to the small end, and the influence of the viscosity of the material on the operation of the solid towards the small end is reduced, so that the high-viscosity rare earth mixed solution can be continuously separated, and the separation efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of centrifuge technology, specifically relating to a horizontal screw centrifuge for rare earth separation. Background Technology

[0002] In the rare earth separation and purification process, multiple stages of raw material dissolution and solid-liquid separation are performed to dissolve the required rare earth elements in the liquid for subsequent purification. During the raw material dissolution and solid-liquid separation process, the high viscosity and complex composition of the solid-liquid mixture make solid-liquid separation difficult. Existing methods use plate and frame filter presses for filtration. In this process, the solid-liquid mixture is fed into filter plates, and high pressure forces the liquid through the filter holes while the solid remains in the middle of the plates, achieving solid-liquid separation. However, due to the high viscosity of the solid-liquid mixture, the solid tends to stick to the filter plates, requiring extensive manual shoveling, which wastes significant manpower. Furthermore, plate and frame filter presses operate intermittently, requiring a backup system for solid-liquid separation, resulting in low separation efficiency. Utility Model Content

[0003] Therefore, this invention aims to solve the problem of low separation efficiency of solid-liquid mixtures in the prior art.

[0004] Therefore, the technical solution adopted is a horizontal screw centrifuge for rare earth separation, comprising: a casing, a rotating drum rotatably connected inside the casing, a spiral pusher rod coaxially arranged inside the rotating drum, both the rotating drum and the spiral pusher rod being conical and rotatably connected, the blades on the spiral pusher rod having a gradually decreasing pitch from the large end to the small end, one end of the feed pipe extending out of the casing, the other end of the feed pipe extending into the spiral pusher rod, a discharge port communicating with the feed pipe being provided on the outer wall of the spiral pusher rod, an overflow port being provided on the end face of the large end of the rotating drum, a liquid discharge port communicating with the overflow port being provided at the bottom end of the casing, a discharge port being provided on the small end of the rotating drum, and a solid discharge port communicating with the discharge port being provided at the bottom end of the casing.

[0005] Preferably, the cover is fixed on the base frame.

[0006] Preferably, a motor and a differential are mounted on the base frame. The motor output shaft is connected to the differential input shaft, the first output end of the differential is connected to the drum, and the second output end of the differential is connected to the screw pusher.

[0007] Preferably, the drum and the screw feeder are rotatably connected by bearings.

[0008] Preferably, a lifting ring is provided at the top of the cover.

[0009] Preferably, a support base is provided at the bottom of the cover.

[0010] The present invention has the following advantages: the spiral pusher and the drum rotate in the same direction at a certain differential speed. Under the centrifugal force generated by the high-speed rotation, the denser solid particles are thrown towards the inner wall of the drum, forming a solid ring layer, while the liquid phase forms a liquid ring layer located inside the solid ring layer. Utilizing the speed difference, the spiral pusher pushes the solid particles in the solid ring layer towards the discharge port, and then discharges them through the solid discharge port. The liquid in the liquid ring layer continuously overflows through the overflow port at the large end of the drum, forming a separated liquid, which is discharged through the liquid discharge port. Due to the high viscosity of the rare earth solution, the blades of the spiral pusher adopt a variable pitch structure, gradually reducing the pitch from the large end to the small end, reducing the influence of material viscosity on the movement of solids towards the small end, thereby enabling continuous separation of the high-viscosity rare earth mixture and improving separation efficiency.

[0011] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained by means of the structures particularly pointed out in the written description and the accompanying drawings.

[0012] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0013] 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:

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a top view of the present invention;

[0016] The components are as follows: 1. Cover; 2. Drum; 3. Spiral pusher; 4. Feed pipe; 5. Discharge port; 6. Overflow port; 7. Liquid discharge port; 8. Discharge port; 9. Solid discharge port; 10. Base frame; 11. Motor; 12. Differential; 13. Bearing; 14. Lifting ring; 15. Support base. Detailed Implementation

[0017] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0018] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly or indirectly attached to that other component. When a component is referred to as being "connected to" another component, it can be directly or indirectly connected to that other component.

[0019] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, 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.

[0020] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0021] This utility model provides a horizontal screw centrifuge specifically for rare earth separation, such as... Figure 1-2 As shown, the device includes: a housing 1; a drum 2 rotatably connected inside the housing 1; a spiral pusher 3 coaxially arranged inside the drum 2; both the drum 2 and the spiral pusher 3 are conical and rotatably connected; the blades on the spiral pusher 3 have a gradually decreasing pitch from the large end to the small end; one end of a feed pipe 4 extends out of the housing 1 and is connected to the housing 1; the other end of the feed pipe 4 extends into the spiral pusher 3; a discharge port 5 communicating with the feed pipe 4 is provided on the outer wall of the spiral pusher 3; an overflow port 6 is provided on the end face of the large end of the drum 2; a liquid discharge port 7 communicating with the overflow port 6 is provided at the bottom of the housing 1; a discharge port 8 is provided on the small end of the drum 2; and a solid discharge port 9 communicating with the discharge port 8 is provided at the bottom of the housing 1. The blades of the spiral pusher 3 are made of hard alloy, which can effectively prevent material from wearing the blades.

[0022] The beneficial technical effects of the above technical solution are as follows: The solid-liquid mixture enters through the feed pipe 4 and then through the discharge port 5 into the space between the screw pusher 3 and the drum 2. The screw pusher 3 and the drum 2 rotate in the same direction at a certain differential speed. Under the centrifugal force generated by the high-speed rotation, the denser solid particles are thrown towards the inner wall of the drum 2, forming a solid ring layer, while the liquid phase forms a liquid ring layer located inside the solid ring layer. Utilizing the speed difference, the screw pusher 3 pushes the solid particles of the solid ring layer towards the discharge port 8, and then discharges them through the solid discharge port 9. The liquid in the liquid ring layer continuously overflows through the overflow port 6 at the large end of the drum 2, forming a separated liquid, which is discharged through the liquid discharge port 7. Due to the high viscosity of the rare earth solution, the blades of the screw pusher 3 adopt a variable pitch structure, gradually reducing the pitch from the large end to the small end, reducing the influence of material viscosity on the movement of solids towards the small end, thereby enabling continuous separation of the high-viscosity rare earth mixture and improving separation efficiency.

[0023] In one embodiment, the casing 1 is fixed to the base frame 10 for mounting. The base frame 10 is equipped with a motor 11 and a differential 12. The output shaft of the motor 11 is connected to the input and output shafts of the differential 12. The first output end of the differential 12 is connected to the drum 2, and the second output end is connected to the screw pusher 3. The motor 11 outputs a speed that drives the screw pusher 3 and the drum 2 to rotate in the same direction at a certain differential speed via the differential 12. The differential 12 uses a hydraulic station to adjust the speed difference, thus achieving stepless adjustment of the differential speed. The drum 2 and the screw pusher 3 are rotatably connected by bearings 13 to reduce wear between parts. A lifting ring 14 is provided at the top of the casing 1 for easy lifting of the centrifuge. A support base 15 is provided at the bottom of the casing 1 to support the casing.

[0024] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A horizontal screw centrifuge specifically for rare earth separation, characterized in that, include: The cover (1) has a rotating drum (2) rotatably connected inside the cover (1). A spiral push rod (3) is coaxially arranged inside the drum (2). Both the drum (2) and the spiral push rod (3) are conical and rotatably connected. The blades on the spiral push rod (3) have a gradually decreasing pitch from the large end to the small end. One end of the feed pipe (4) extends out of the cover (1), and the other end of the feed pipe (4) extends into the spiral push rod (3). The outer wall of the spiral push rod (3) is provided with a discharge port (5) that communicates with the feed pipe (4). An overflow port (6) is provided on the end face of the large end of the drum (2). A liquid discharge port (7) that communicates with the overflow port (6) is provided at the bottom end of the cover (1). A discharge port (8) is provided on the small end of the drum (2). A solid discharge port (9) that communicates with the discharge port (8) is provided at the bottom end of the cover (1).

2. The horizontal screw centrifuge for rare earth separation according to claim 1, characterized in that, The cover (1) is fixed on the base frame (10).

3. A horizontal screw centrifuge for rare earth separation according to claim 2, characterized in that, A motor (11) and a differential (12) are installed on the base frame (10). The output shaft of the motor (11) is connected to the input shaft of the differential (12). The first output end of the differential (12) is connected to the drum (2), and the second output end of the differential (12) is connected to the screw push rod (3).

4. A horizontal screw centrifuge for rare earth separation according to claim 1, characterized in that, The drum (2) and the screw pusher (3) are rotatably connected by a bearing (13).

5. A horizontal screw centrifuge for rare earth separation according to claim 1, characterized in that, A lifting ring (14) is provided at the top of the cover (1).

6. A horizontal screw centrifuge for rare earth separation according to claim 1, characterized in that, A support base (15) is provided at the bottom of the cover (1).

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