A stirring device for rare earth sulfate leaching
By designing the intermittent feeding mechanism and transmission mechanism of the stirring device, the mixing method of sulfuric acid and rare earth is controlled, thus solving the safety hazards caused by violent reactions and achieving uniform mixing and stable production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GANSU RARE EARTH NEW MATERIAL CO LTD
- Filing Date
- 2025-06-24
- Publication Date
- 2026-06-23
AI Technical Summary
Existing rare earth sulfate leaching stirring devices experience a sharp increase in pressure and temperature during the mixing process due to violent reactions, posing safety hazards and affecting production continuity and equipment lifespan.
A mixing device was designed, comprising a mixing tank, a motor, a stirring rod, an intermittent feeding mechanism, and a transmission mechanism. The mixing of sulfuric acid and rare earth elements is controlled by the motor driving the stirring rod and the intermittent feeding mechanism. Intermittent feeding and mixing are adopted to reduce the risk of violent reactions, and a shovel plate is used to prevent raw material deposition.
This process achieves uniform mixing of sulfuric acid and rare earth elements, reduces the risk of explosion, improves chemical reaction efficiency and production stability, and ensures production continuity and equipment safety.
Smart Images
Figure CN224394966U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of rare earth sulfate leaching stirring technology, specifically to a stirring device for rare earth sulfate leaching. Background Technology
[0002] Rare earth elements in rare earth concentrates typically exist in the form of carbonates, fluorides, phosphates, oxides, or silicates, which are insoluble in water. To extract them and produce various mixed rare earth compounds, a series of chemical reactions are required to convert the rare earth elements into compounds soluble in water or inorganic acids. Subsequently, a series of processes such as dissolution, separation, purification, concentration, or calcination are carried out. Among the many methods for decomposing rare earth concentrates, a common approach is to first dissolve them with sulfuric acid, and then use a stirring device for rare earth sulfate leaching to ensure that the sulfuric acid and rare earth elements are fully mixed. After this operation, a solvent extraction process is then used to successfully obtain rare earth oxides.
[0003] While existing sulfuric acid rare earth leaching stirring devices can fully mix sulfuric acid and rare earth, sulfuric acid reacts violently with other substances. If all the sulfuric acid and rare earth are mixed at once, the reaction will release a large amount of heat and gas instantly, causing the pressure and temperature inside the stirring tank to increase sharply, which may lead to damage to the stirring tank or even safety accidents, affecting the continuity of production and the service life of the equipment. Therefore, we propose a stirring device for sulfuric acid rare earth leaching. Utility Model Content
[0004] The purpose of this invention is to provide a stirring device for rare earth sulfate leaching to solve the problems existing in the prior art.
[0005] The technical solution adopted in this utility model is as follows:
[0006] A stirring device for rare earth sulfate leaching includes a stirring tank 1, a discharge pipe 4 at the bottom of the stirring tank 1, a motor 5 installed in the center of the top cover 2 of the stirring tank 1, two feed pipes 3 symmetrically arranged on both sides of the motor 5 on the top cover 2 of the stirring tank 1, the output shaft of the motor 5 passing through the stirring tank 1 and a stirring rod 6 horizontally fixed at the end of the output shaft, and two intermittent feeding mechanisms 7 arranged on both sides of the stirring rod 6.
[0007] The intermittent feeding mechanism 7 includes a push plate 710 located on the lower side of the top cover 2 and an extension arm 701 vertically arranged at the end of the stirring rod 6. A transmission rod 702 is hinged to the lower side of the extension arm 701. A movable disk 709 is provided at the end of the transmission rod 702 near the wall of the mixing tank 1. A wave-shaped guide groove 713 adapted to the movable disk 709 is provided on the inner wall of the mixing tank 1. A lifting frame 703 is hinged to the end of the transmission rod 702 away from the inner wall of the mixing tank 1. The top of the lifting frame 703 is connected to the push plate 710.
[0008] The lifting frame 703 is U-shaped, with a secondary clamping plate 707 fixed at its top. The secondary clamping plate 707 is connected to the push plate 710 via a connecting rod. A sliding sleeve 704 is fitted on the stirring rod 6. Two positioning rods 705 are symmetrically fixed on the outer wall of the sliding sleeve 704. The end of the positioning rod 705 away from the sliding sleeve 704 is movably fitted onto the lifting frame 703 through a limiting hole. A main clamping plate 706 is fixed between the lower side of the positioning rod 705 and the lifting frame 703.
[0009] The end of the transmission rod 702 away from the moving disk 709 is fixed with a connecting rod 714, and the lower end of the connecting rod 714 is fixed with a scraper plate 708.
[0010] A rectangular groove is provided on the lower side of the extension arm 701, and a rotating shaft is fixed in the rectangular groove. The transmission rod 702 is rotatably mounted on the rotating shaft.
[0011] The outlet end of the feed pipe 3 is movably fitted with a blocking block 711. The blocking block 711 is composed of three cylindrical sections whose diameter decreases from bottom to top. The bottommost cylinder is fitted with the feed pipe 3 with a clearance. The outer wall of the topmost cylinder is symmetrically fixed with a sliding plate 712. The inner wall of the feed pipe 3 is provided with a groove to facilitate the sliding of the sliding plate 712.
[0012] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:
[0013] 1. This utility model, through the coordination of a motor, stirring rod, intermittent feeding mechanism, transmission mechanism, extension arm and transmission rod, push plate drives the blockage block to rise and fall regularly along the bottom of the feed pipe, realizing precise rhythm control of material supply, so that sulfuric acid and rare earth can be mixed and stirred in small amounts and multiple times, thus mildening the violent reaction and greatly reducing the risk of explosion caused by violent exothermic reaction and gas phase expansion.
[0014] 2. This utility model, through the cooperation of the transmission rod, connecting rod and shovel plate and other structures, enables the shovel plate to fully stir the rare earth at the bottom of the mixing tank, effectively avoiding the deposition of raw materials at the bottom of the tank, ensuring that the rare earth is evenly distributed in the mixing tank, so that it can fully contact other reactants or additives, thereby improving the efficiency of chemical reaction or the uniformity of mixing, and providing a stable raw material base for subsequent production processes.
[0015] 3. This utility model, through the cooperation of the main card plate, the auxiliary card plate and the stirring rod, ensures that when the lifting frame drives the auxiliary card plate and the push plate to lift and lower, the movement is smooth and the amplitude is moderate. It avoids problems such as increased equipment vibration and uneven distribution of raw materials that may be caused by excessive lifting and lowering amplitude. It provides a stable production environment for rare earth processing, helps to maintain the continuity and consistency of production, and reduces the adverse effects of production interruption or increased defect rate caused by equipment instability. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0017] Figure 2 This is a cross-sectional structural diagram of the top cover of this utility model;
[0018] Figure 3 This is a cross-sectional structural diagram of the mixing tank of this utility model;
[0019] Figure 4 This is a schematic diagram of the intermittent feeding mechanism of this utility model;
[0020] Figure 5 This is a schematic diagram of the structure of the lifting frame of this utility model;
[0021] Figure 6 This is a schematic diagram of the push plate of this utility model.
[0022] In the diagram: 1. Mixing tank; 2. Top cover; 3. Feed pipe; 4. Discharge pipe; 5. Motor; 6. Mixing rod; 7. Intermittent feeding mechanism; 701. Extension arm; 702. Transmission rod; 703. Lifting frame; 704. Sliding sleeve; 705. Positioning rod; 706. Main clamping plate; 707. Secondary clamping plate; 708. Shovel plate; 709. Moving disc; 710. Push plate; 711. Blocking block; 712. Slide plate; 713. Guide groove; 714. Connecting rod. Detailed Implementation
[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0024] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0025] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., 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.
[0026] Example 1
[0027] like Figure 1-6 This embodiment provides a stirring device for rare earth sulfuric acid leaching, including a stirring tank 1. A discharge pipe 4 is provided at the bottom of the stirring tank 1. A motor 5 is installed in the center of the top cover 2 of the stirring tank 1. Two feed pipes 3 are symmetrically arranged on both sides of the motor 5 on the top cover 2 of the stirring tank 1. The output shaft of the motor 5 passes through the stirring tank 1, and a stirring rod 6 is horizontally fixed at the end of the output shaft. Two intermittent feeding mechanisms 7 are symmetrically arranged on both sides of the stirring rod 6. In use, sulfuric acid is first added to the inside of the stirring tank 1, and then rare earth is added to the inside of the stirring tank 1 through the feed pipes 3. The motor 5 drives the stirring rod 6 to rotate, causing the stirring rod 6 to stir the rare earth and sulfuric acid.
[0028] The intermittent feeding mechanism 7 includes a push plate 710 located below the top cover 2 and an extension arm 701 vertically positioned at the end of the stirring rod 6. A transmission rod 702 is hinged to the lower side of the extension arm 701. A rectangular groove is formed on the lower side of the extension arm 701, and a rotating shaft is fixed inside the rectangular groove. The transmission rod 702 is rotatably mounted on the rotating shaft. A movable disc 709 is provided at the end of the transmission rod 702 near the wall of the mixing tank 1. A wave-shaped guide groove 713 adapted to the movable disc 709 is provided on the inner wall of the mixing tank 1. The movable disc 709 is slidably connected inside the guide groove 713. A lifting frame 703 is hinged to the end of the transmission rod 702 away from the inner wall of the mixing tank 1. The top of the lifting frame 703 is connected to the push plate 710.
[0029] When the transmission rod 702 rotates, it drives the movable disk 709 to rotate, causing the movable disk 709 to move along the inside of the guide groove 713. When the movable disk 709 moves to the crest of the guide groove 713, it drives the transmission rod 702 to rotate counterclockwise around the axis, causing the end of the transmission rod 702 away from the movable disk 709 to move downward. The transmission rod 702 drives the push plate 710 to move downward through the lifting frame 703. When the movable disk 709 moves to the trough of the guide groove 713, it drives the transmission rod 702 to rotate clockwise around the axis, causing the end of the transmission rod 702 away from the movable disk 709 to move upward. The transmission rod 702 drives the push plate 710 to move upward through the lifting frame 703, causing the push plate 710 to move up and down reciprocally. The push plate 710 intermittently opens and closes the bottom of the feed pipe 3.
[0030] The lifting frame 703 is U-shaped, with a secondary clamping plate 707 fixed at its top. The secondary clamping plate 707 is fixedly connected to the push plate 710 via a connecting rod. A sliding sleeve 704 is fitted onto the stirring rod 6. Two positioning rods 705 are symmetrically fixed on the outer wall of the sliding sleeve 704. The end of the positioning rod 705 away from the sliding sleeve 704 is movably fitted onto the lifting frame 703 through a limiting hole. A main clamping plate 706 is fixed between the lower sides of the lifting frame 703 and the positioning rod 705. The secondary clamping plate 707 and the main clamping plate 706 cooperate with the stirring rod 6 to limit the distance between the lifting and lowering of the lifting frame 703, preventing the lifting frame 703 from lifting too much and causing the push plate 710 to lift too much via the secondary clamping plate 707.
[0031] When the lifting frame 703 is raised or lowered, it moves along the limiting hole of the positioning rod 705. The stirring rod 6 limits the sliding sleeve 704, and the sliding sleeve 704 limits the positioning rod 705. This causes the lifting frame 703 to move along the outer wall of the stirring rod 6 through the sliding sleeve 704, thereby preventing the lifting frame 703 from rotating during the raising or lowering process.
[0032] A connecting rod 714 is fixed to the end of the transmission rod 702 away from the moving disk 709. The connecting rod 714 is L-shaped, and a shovel plate 708 is fixed to the lower end of the connecting rod 714. When the transmission rod 702 rotates around the rotating shaft, the transmission rod 702 drives the connecting rod 714 to swing up and down, and the connecting rod 714 drives the shovel plate 708 to swing up and down, so that the shovel plate 708 stirs the rare earth and sulfuric acid at the bottom of the mixing tank 1, preventing the rare earth from being affected by gravity and settling at the bottom of the mixing tank 1, thus preventing insufficient mixing.
[0033] In this utility model, the output shaft of the motor 5 drives the stirring rod 6 to rotate, the stirring rod 6 drives the extension arm 701 to rotate, the extension arm 701 drives the transmission rod 702 to rotate, and the transmission rod 702 drives the lifting frame 703 to cooperate with the push plate 710, so that the raw materials inside the feed pipe 3 are fed intermittently.
[0034] Example 2
[0035] This embodiment is based on Embodiment 1. A blocking block 711 is movably inserted into the outlet end of the feed pipe 3. The blocking block 711 consists of three cylindrical sections with decreasing diameters from bottom to top. The lowest cylindrical section is fitted with the feed pipe 3 with a clearance, and a sliding plate 712 is symmetrically fixed to the outer wall of the highest cylindrical section. A groove is provided on the inner wall of the feed pipe 3 to facilitate the sliding of the sliding plate 712. The bottom of the blocking block 711 contacts the top of the push plate 710. When the push plate 710 moves downwards, it separates from the blocking block 711. The blocking block 711 moves downwards under the influence of gravity, causing the lowest cylindrical section to detach from the feed pipe. A gap exists between the upper cylindrical section inside the feed pipe and the feed pipe, allowing the rare earth elements inside the feed pipe to be discharged into the mixing tank.
[0036] The working principle of this utility model is as follows: the output shaft of motor 5 drives the stirring rod 6 to rotate, the stirring rod 6 drives the extension arm 701 to rotate, the extension arm 701 drives the transmission rod 702 to rotate, and the transmission rod 702 drives the moving disk 709 to rotate, causing the moving disk 709 to move along the inside of the guide groove 713. When the moving disk 709 moves to the crest of the guide groove 713, the moving disk 709 drives the transmission rod 702 to rotate counterclockwise around the rotating shaft, causing the end of the transmission rod 702 away from the moving disk 709 to move downward. The transmission rod 702 drives the auxiliary clamping plate 707 to move downward through the lifting frame 703. The auxiliary clamping plate 707 drives the push plate 710 to move downward. The push plate 710 separates from the blockage block 711, and the blockage block 711 moves downward under the influence of gravity, making the blockage block 711 more... The narrow end moves to the lower half of the feed pipe 3, allowing the rare earth inside the feed pipe 3 to be discharged into the mixing tank 1. When the moving disc 709 moves to the trough of the guide groove 713, the moving disc 709 drives the transmission rod 702 to rotate clockwise around the rotating shaft, causing the end of the transmission rod 702 away from the moving disc 709 to move upward. The transmission rod 702 drives the auxiliary clamping plate 707 to move upward through the lifting frame 703. The auxiliary clamping plate 707 drives the push plate 710 to move upward. The push plate 710 pushes the blocking block 711 upward, causing the blocking block 711 to re-insert into the feed pipe 3 to seal the feed pipe 3. Through the up-and-down reciprocating movement of the push plate 710, the push plate 710 intermittently opens and closes the bottom of the feed pipe 3, realizing intermittent feeding of rare earth.
[0037] Meanwhile, when the transmission rod 702 rotates around the rotating shaft of the moving disk 709, the transmission rod 702 drives the connecting rod 714 to swing up and down, and the connecting rod 714 drives the shovel plate 708 to swing up and down, so that the shovel plate 708 stirs the rare earth and sulfuric acid at the bottom of the mixing tank 1, preventing the rare earth from being affected by gravity and settling at the bottom of the mixing tank 1, resulting in insufficient mixing.
Claims
1. A stirring device for rare earth sulfate leaching, comprising a stirring barrel (1), the bottom of the stirring barrel (1) is provided with a discharge pipe (4), a motor (5) is installed in the center of the top cover (2) of the stirring barrel (1), two feed pipes (3) are symmetrically arranged on both sides of the motor (5) on the top cover (2) of the stirring barrel (1), characterized in that, The output shaft of the motor (5) is inserted into the mixing tank (1) and a stirring rod (6) is fixed horizontally at the end of the output shaft. Two intermittent feeding mechanisms (7) are provided on both sides of the stirring rod (6). The intermittent feeding mechanism (7) includes a push plate (710) located on the lower side of the top cover (2) and an extension arm (701) vertically arranged at the end of the stirring rod (6). A transmission rod (702) is hinged to the lower side of the extension arm (701). A moving plate (709) is provided at one end of the transmission rod (702) near the wall of the mixing tank (1). A wave-shaped guide groove (713) adapted to the moving plate (709) is provided on the inner wall of the mixing tank (1). A lifting frame (703) is hinged to one end of the transmission rod (702) away from the inner wall of the mixing tank (1). The top of the lifting frame (703) is connected to the push plate (710).
2. A stirring device for leaching of rare earth sulphate according to claim 1, characterized in that: The lifting frame (703) is U-shaped, with a secondary clamping plate (707) fixed at its top. The secondary clamping plate (707) is connected to the push plate (710) via a connecting rod. A sliding sleeve (704) is fitted on the stirring rod (6). Two positioning rods (705) are symmetrically fixed on the outer wall of the sliding sleeve (704). The end of the positioning rod (705) away from the sliding sleeve (704) is movably fitted onto the lifting frame (703) through a limiting hole. A main clamping plate (706) is fixed between the positioning rod (705) and the lifting frame (703) on the lower side.
3. A stirring device for leaching of rare earth sulphate according to claim 1, characterized in that: The transmission rod (702) is fixed with a connecting rod (714) at the end away from the moving disk (709), and a scraper plate (708) is fixed at the lower end of the connecting rod (714).
4. The agitating device for leaching of rare earth sulphate according to claim 1, characterized in that: A rectangular groove is provided on the lower side of the extension arm (701), and a rotating shaft is fixed in the rectangular groove. The transmission rod (702) is rotatably mounted on the rotating shaft.
5. The agitator for leaching of rare earth sulphate according to claim 1, wherein: The outlet end of the feed pipe (3) is movably fitted with a blocking block (711). The blocking block (711) is composed of three cylindrical sections whose diameter decreases from bottom to top. The bottommost cylinder is fitted with the feed pipe (3) with a clearance. The outer wall of the topmost cylinder is symmetrically fixed with a sliding plate (712). The inner wall of the feed pipe (3) is provided with a sliding groove to facilitate the sliding of the sliding plate (712).