Precipitation device for rare earth

Abstract

The utility model discloses a precipitation device for rare earth, which belongs to the technical field of rare earth precipitation and comprises a mixing box, the mixing box is communicated and connected with a plurality of primary precipitation boxes and secondary precipitation boxes, a temperature thermocouple and an electric heating structure are arranged in the mixing box, and the mixing box is provided with a ventilation structure and a stirring stick. The bottoms of the multiple primary settling tanks are communicated with the interior of the mixing tank through returned material conveying pipes, filter screen columns are arranged in the multiple primary settling tanks, discharging pipes are arranged at the bottoms of the filter screen columns and the bottoms of the secondary settling tanks, and electromagnetic valves are arranged in the discharging pipes; and a secondary filter screen is movably arranged on the discharge pipe in the secondary settling tank. After being stirred and mixed for the first time, a rare earth solution and a precipitant are conveyed to the primary precipitation tank for precipitation and are primarily filtered through the filter screen column, the stirring temperature can be controlled through the electric heating structure and the temperature thermocouple, secondary stirring purification is performed, and then the rare earth solution and the precipitant are conveyed to the secondary precipitation tank for precipitation separation.

Description

Technical Field

[0001] The utility model relates to the technical field of rare earth precipitation, in particular to a precipitation device for rare earth. Background Art

[0002] Rare earth is a special type of chemical elements, including scandium, yttrium and lanthanide elements of the III group of the periodic table, a total of 17 chemical elements. These elements usually exist in the form of oxides and are non-renewable resources. Rare earth elements can be divided into two categories: light rare earth and heavy rare earth. Light rare earth includes seven elements: lanthanum, cerium, praseodymium, neodymium, promethium, samarium and europium, while heavy rare earth includes ten elements: gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, scandium and yttrium.

[0003] Rare earths are widely used in various fields due to their unique physical and chemical properties. For example, rare earth elements have important applications in emerging fields such as electronics, new energy, and environmental protection. In addition, rare earths are also used in metallurgy, ceramics, chemicals, electronics, medical treatment, superconductivity, and other fields. In terms of smelting and separation, rare earths can be used to obtain rare earth oxides, rare earth metals, etc. through pyrometallurgical or hydrometallurgical techniques.

[0004] Rare earth precipitation is an important rare earth processing technology, mainly used to separate rare earth elements from rare earth liquid. The liquid containing rare earth elements is easy to react with common precipitants such as oxalic acid and ammonium bicarbonate to form rare earth salts. By adding different precipitants and adjusting the temperature, different rare earth elements can be separated with different precipitates and precipitation speeds.

[0005] The existing precipitation device is only further provided with a stirring structure, which stirs the rare earth solution and the precipitant, so that the rare earth elements and the precipitant can fully react to generate a precipitate. However, the precipitate that has only reacted once usually contains a mixture of multiple rare earth elements, and the purity is not enough. If a higher purity rare earth element is required, further processing is required, such as dissolving the rare earth precipitate again through the dissolution secondary precipitation method, and re-precipitating and separating by changing the reaction temperature and using different precipitants, so as to obtain a higher purity rare earth element.

[0006] Traditionally, one stirring chamber corresponds to one precipitation chamber. Since the stirred solution needs a certain amount of time to precipitate, the one-to-one setting will cause the stirring chamber to be idle during the precipitation time, thereby reducing the efficiency of rare earth element separation. Utility Model Content

[0007] In order to solve the technical problem that the precipitate that reacts only once usually contains a mixture of multiple rare earth elements and has insufficient purity, and that a traditional stirring chamber corresponds to one precipitation chamber, and since the stirred solution needs a certain amount of time to precipitate, the one-to-one setting will cause the stirring chamber to be idle during the precipitation time, thereby reducing the efficiency of rare earth element separation, the utility model provides a precipitation device for rare earths.

[0008] A precipitation device for rare earths comprises a mixing box, which is connected to a plurality of primary precipitation boxes and secondary precipitation boxes, a temperature measuring thermocouple and an electric heating structure are arranged inside the mixing box, the mixing box is provided with a ventilation structure and a stirring rod, the bottoms of the plurality of primary precipitation boxes are respectively connected to the interior of the mixing box through return material conveying pipes, the interiors of the plurality of primary precipitation boxes are provided with filter net columns, the filter net columns and the bottoms of the secondary precipitation boxes are provided with discharge pipes, an electromagnetic valve is arranged inside the discharge pipe, and the discharge pipe in the secondary precipitation box is also movably provided with a secondary filter net.

[0009] Furthermore, a motor and a control panel are arranged on the top wall of the mixing box, a feed pipe with a cover is arranged through the top wall of the mixing box, a guide pipe with one inlet and four outlets is arranged through the bottom wall of the mixing box, and a five-way ball valve is arranged inside the guide pipe.

[0010] Furthermore, the temperature measuring thermocouple and the electric heating structure are both arranged on the side wall of the mixing box, and the electric heating structure is an electric heating plate, which is in multiple numbers and evenly arranged on the side wall of the mixing box.

[0011] Furthermore, the ventilation structure includes a group of ventilation holes penetrating the corresponding side walls of the mixing box, electromagnetic valves are arranged inside the two ventilation holes, and a support block is arranged outside one of the ventilation holes, on which a hair dryer structure matching the ventilation holes is arranged, and an air filter is arranged inside the other ventilation hole.

[0012] Furthermore, the stirring rod includes a rotating shaft fixedly arranged on the output end of the motor, and a plurality of stirring paddles are fixedly arranged on the outer wall of the rotating shaft.

[0013] Furthermore, there are three primary sedimentation boxes and return material conveying pipes, and they are connected to the secondary sedimentation boxes through guide pipes and the mixing boxes respectively. The top of the return material conveying pipe penetrates the side wall of the mixing box, and the bottom end penetrates the bottom of the side wall of the primary sedimentation box, and a pump body is also provided on the return material conveying pipe.

[0014] Furthermore, the filter mesh column is vertically arranged inside the primary sedimentation box, and its interior is a hollow structure, the outer wall is a mesh structure, and a discharge pipe is arranged at the bottom of the internal hollow part.

[0015] Furthermore, the bottom wall of the secondary sedimentation box is a conical bottom wall, the discharge pipe is arranged through the bottom of the cone, a connecting plate is arranged on the bottom wall of the secondary sedimentation box, a micro motor is arranged on the outer wall of the connecting plate, a movable screw is rotatably arranged between the connecting plate and the outer wall of the discharge pipe, one end of the secondary filter screen passes through the discharge pipe and is slidably arranged on the threaded outer wall of the movable screw, and the other end is movably arranged on the groove arranged on the side wall of the discharge pipe.

[0016] Furthermore, the control panel and the temperature measuring thermocouple, the electric heating structure, the electromagnetic valve, the motor, the five-way ball valve, the hair dryer structure, the pump body, and the micro motor are connected by telecommunication.

[0017] Compared with the prior art, the utility model has the following beneficial effects: after the rare earth solution and the precipitant are stirred and mixed for the first time, they are transported to the primary sedimentation box for sedimentation and are initially filtered through the filter column. After the three primary sedimentation boxes are filled, the separated rare earth precipitates are transported back to the mixing box through the return material transport pipe in turn according to the sedimentation time sequence, the stirring temperature is controlled by the electric heating structure and the temperature measuring thermocouple, the precipitant is added again for secondary stirring and purification, and then transported to the secondary sedimentation box for sedimentation separation. The entire sedimentation and separation process can be preset through the steps of the control panel to realize automated production. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the front view of the structure of the utility model;

[0019] Figure 2 It is a top view schematic diagram of the structure of the utility model;

[0020] Figure 3 It is a schematic diagram of the structure A of the utility model;

[0021] Figure 4 This is a schematic diagram of part structure B of the utility model;

[0022] Figure 5 It is a schematic diagram of partial structure C of the utility model.

[0023] In the figure: 1. mixing box; 2. primary sedimentation box; 3. secondary sedimentation box; 4. temperature measuring thermocouple; 5. electric heating structure; 6. ventilation structure; 7. stirring rod; 8. return material conveying pipe; 9. filter column; 10. discharge pipe; 11. electromagnetic valve; 12. secondary filter; 13. motor; 14. control panel; 15. feed pipe; 16. guide pipe; 17. five-way ball valve; 18. ventilation hole; 19. support block; 20. hair dryer structure; 21. air filter; 22. rotating shaft; 23. stirring paddle; 24. pump body; 25. connecting plate; 26. micro motor; 27. moving screw; 28. groove. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0025] It should be noted that the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so as to describe the embodiments of the utility model described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0026] In the present invention, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0027] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this utility model can be understood according to the specific circumstances. In addition, the term "plurality" should mean two or more than two.

[0028] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present utility model can be combined with each other. Figure 1-Figure 5 The utility model is described in detail in conjunction with the embodiments.

[0029] A rare earth precipitation device comprises a mixing box 1, the top wall of which is provided with a motor 13 and a control panel 14, and a feed pipe 15 with a cover is provided through the top wall of the mixing box 1, through which a rare earth solution and a precipitant can be added into the mixing box 1.

[0030] The mixing box 1 is connected to several primary sedimentation boxes 2 and secondary sedimentation boxes 3 through a guide pipe 16. The guide pipe 16 is a one-inlet and four-outlet structure, with one water inlet and four water outlets, and is arranged through the bottom wall of the mixing box 1. A five-way ball valve 17 is arranged inside the guide pipe 16, and the five-way ball valve 17 can be used to control the mixing box 1 to be connected to any of several primary sedimentation boxes 2 and secondary sedimentation boxes 3.

[0031] There are three primary sedimentation boxes 2 and return material conveying pipes 8, and they are connected to the secondary sedimentation boxes 3 through the guide pipes 16 and the mixing box 1 respectively. The mixing box 1 is stirred and mixed, and then the mixed solution is conveyed to the three primary sedimentation boxes 2 in sequence through the guide pipes 16 for sedimentation and separation. The separated precipitates are returned to the mixing box 1 in sequence according to the sedimentation time through the return material conveying pipes 8 for secondary mixing and stirring. The solution obtained after the secondary mixing and stirring is conveyed to the secondary sedimentation box 3 for separation again to obtain a rare earth precipitate with higher purity.

[0032] A temperature measuring thermocouple 4 and an electric heating structure 5 are provided inside the mixing box 1 to achieve internal heating of the mixing box 1. The temperature measuring thermocouple 4 and the electric heating structure 5 are both arranged on the side wall of the mixing box 1, and the electric heating structure 5 is an electric heating plate. There are multiple plates evenly arranged on the side wall of the mixing box 1. The temperature measuring thermocouple 4 can sense and measure the temperature inside the mixing box 1. Different rare earth element precipitates can be obtained by adjusting the temperature according to the precipitation temperature of different rare earth elements.

[0033] A ventilation structure 6 is provided on the side wall of the mixing box 1 to achieve heat dissipation inside the mixing box 1. The ventilation structure 6 includes a group of ventilation holes 18 that penetrate the corresponding side walls of the mixing box 1. Solenoid valves 11 are provided inside the two ventilation holes 18, and a support block 19 is provided outside one of the ventilation holes 18. A hair dryer structure 20 that is compatible with the ventilation hole 18 is provided on the support block 19, and an air filter 21 is provided inside the other ventilation hole 18.

[0034] When heat dissipation and ventilation are required, the electromagnetic valves 11 inside the two ventilation holes 18 are opened to allow air convection to accelerate heat dissipation. The hair dryer structure 20 blows cold air into the ventilation holes 18, and the hot air is filtered by the air filter 21 and discharged to the outside.

[0035] A stirring rod 7 is rotatably arranged inside the mixing box 1, and the stirring rod 7 includes a rotating shaft 22 fixedly arranged at the output end of the motor 13, and a plurality of stirring paddles 23 are fixedly arranged on the outer wall of the rotating shaft 22. When the motor 13 is started, the rotating shaft 22 and the stirring paddles 23 can be driven to rotate, thereby stirring and mixing the rare earth solution and the precipitant, so that the two are fully contacted and mixed, and react to form a precipitate.

[0036] Several primary sedimentation boxes 2 are each provided with a filter column 9, the filter column 9 is provided with a discharge pipe 10, an electromagnetic valve 11 is provided inside the discharge pipe 10, the filter column 9 is vertically arranged inside the primary sedimentation box 2, and the interior thereof is a hollow structure, the outer wall is a mesh structure, and a discharge pipe 10 is provided at the bottom of the internal hollow part.

[0037] With the cooperation of the guide pipe 16 and the five-way ball valve 17, the evenly stirred solution enters the three primary sedimentation boxes 2 in turn for sedimentation and separation. The electromagnetic valve 11 arranged inside the discharge pipe 10 is opened, and the separated wastewater slowly flows into the internal hollow part from the mesh outer wall of the filter mesh column 9 and flows out from the discharge pipe 10. The filter mesh column 9 is erected inside the primary sedimentation box 2 so that its top can directly contact the wastewater above the sediment, and the wastewater flows into the discharge pipe 10 from the top to avoid disturbing the wastewater and sediment again.

[0038] The bottoms of several primary sedimentation boxes 2 are connected to the interior of the mixing box 1 through return material conveying pipes 8. The top of the return material conveying pipe 8 penetrates the side wall of the mixing box 1, and the bottom of the return material conveying pipe 8 penetrates the bottom of the side wall of the primary sedimentation box 2. A pump body 24 is also provided on the return material conveying pipe 8.

[0039] After the wastewater is separated, the remaining precipitate is at the bottom of the primary sedimentation tank 2. At this time, the pump body 24 is started to suck the precipitate into the return material conveying pipe 8 and convey it to the mixing tank 1. By adjusting the temperature and adding different precipitants, etc., the precipitate is dissolved again after changing the conditions, and a higher purity rare earth solution can be obtained.

[0040] The bottom wall of the secondary sedimentation box 3 is a conical bottom wall, and a discharge pipe 10 is arranged through the bottom of the cone, and a solenoid valve 11 and a secondary filter screen 12 are arranged inside the discharge pipe 10. A connecting plate 25 is arranged on the bottom wall of the secondary sedimentation box 3, and a micro motor 26 is arranged on the outer wall of the connecting plate 25. A moving screw 27 is rotatably arranged between the connecting plate 25 and the outer wall of the discharge pipe 10. One end of the secondary filter screen 12 penetrates the discharge pipe 10 and is slidably arranged on the threaded outer wall of the moving screw 27, and the other end is movably arranged on the groove 28 arranged on the side wall of the discharge pipe 10.

[0041] The precipitate solution after the secondary reaction enters the secondary precipitation tank 3 . After settling for a certain period of time, the electromagnetic valve 11 is opened to allow the wastewater to be discharged outward under the filtration of the secondary filter screen 12 , and the precipitate remains above the secondary filter screen 12 .

[0042] After the wastewater is discharged, the micro motor 26 is started to drive the movable screw 27 to rotate, so that the secondary filter screen 12 moves outward along the movable screw 27 until the channel of the discharge pipe 10 is exposed. The precipitate can be discharged from the channel, and the rare earth precipitate is subsequently dried externally.

[0043] The control panel 14 is connected to the temperature measuring thermocouple 4, the electric heating structure 5, the electromagnetic valve 11, the motor 13, the five-way ball valve 17, the hair dryer structure 20, the pump body 24, and the micro motor 26. The precipitation and separation steps can be preset on the control panel 14, and each component can be controlled by telecommunication according to the preset scheme to realize automatic operation, save labor, and improve efficiency.

[0044] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A precipitation device for rare earth, comprising a mixing box (1), the mixing box (1) being connected to a plurality of primary precipitation boxes (2) and secondary precipitation boxes (3), characterized in that: A temperature measuring thermocouple (4) and an electric heating structure (5) are arranged inside the mixing box (1), a ventilation structure (6) and a stirring rod (7) are arranged in the mixing box (1), the bottoms of a plurality of primary sedimentation boxes (2) are connected to the inside of the mixing box (1) through return material conveying pipes (8), a filter column (9) is arranged inside each of the primary sedimentation boxes (2), a discharge pipe (10) is arranged at the bottom of the filter column (9) and the secondary sedimentation box (3), and an electromagnetic valve (11) is arranged inside the discharge pipe (10), wherein the discharge pipe (10) in the secondary sedimentation box (3) is also movably provided with a secondary filter (12).

2. A rare earth precipitation device according to claim 1, characterized in that: A motor (13) and a control panel (14) are arranged on the top wall of the mixing box (1), a feed pipe (15) with a cover is arranged through the top wall of the mixing box (1), a flow guide pipe (16) with one inlet and four outlets is arranged through the bottom wall of the mixing box (1), and a five-way ball valve (17) is arranged inside the flow guide pipe (16).

3. A rare earth precipitation device according to claim 2, characterized in that: The temperature measuring thermocouple (4) and the electric heating structure (5) are both arranged on the side wall of the mixing box (1), and the electric heating structure (5) is a plurality of electric heating plates which are evenly arranged on the side wall of the mixing box (1).

4. A rare earth precipitation device according to claim 3, characterized in that: The ventilation structure (6) comprises a group of ventilation holes (18) penetrating corresponding side walls of the mixing box (1), two ventilation holes (18) are provided with electromagnetic valves (11) inside, and one of the ventilation holes (18) is provided with a support block (19) outside, and an electric hair dryer structure (20) adapted to the ventilation hole (18) is provided on the support block (19), and an air filter (21) is provided inside the other ventilation hole (18).

5. A rare earth precipitation device according to claim 4, characterized in that: The stirring rod (7) comprises a rotating shaft (22) fixedly arranged at the output end of the motor (13), and a plurality of stirring paddles (23) are fixedly arranged on the outer wall of the rotating shaft (22).

6. A rare earth precipitation device according to claim 5, characterized in that: The number of the primary sedimentation tank (2) and the return material conveying pipe (8) are both three, and they are connected to the secondary sedimentation tank (3) through the guide pipe (16) and the mixing tank (1). The top end of the return material conveying pipe (8) penetrates the side wall of the mixing tank (1), and the bottom end penetrates the bottom of the side wall of the primary sedimentation tank (2). A pump body (24) is also provided on the return material conveying pipe (8).

7. A rare earth precipitation device according to claim 6, characterized in that: The filter screen column (9) is vertically arranged inside the primary sedimentation box (2), and its interior is a hollow structure, and its outer wall is a mesh structure. A discharge pipe (10) is arranged at the bottom of the internal hollow part.

8. A rare earth precipitation device according to claim 7, characterized in that: The bottom wall of the secondary sedimentation box (3) is a conical bottom wall, the discharge pipe (10) is arranged through the bottom of the cone, the bottom wall of the secondary sedimentation box (3) is provided with a connecting plate (25), the outer wall of the connecting plate (25) is provided with a micro motor (26), a movable screw rod (27) is rotatably arranged between the connecting plate (25) and the outer wall of the discharge pipe (10), one end of the secondary filter screen (12) passes through the discharge pipe (10) and is slidably arranged on the threaded outer wall of the movable screw rod (27), and the other end is movably arranged on a groove (28) arranged on the side wall of the discharge pipe (10).

9. A rare earth precipitation device according to claim 8, characterized in that: The control panel (14) is connected to the temperature measuring thermocouple (4), the electric heating structure (5), the electromagnetic valve (11), the motor (13), the five-way ball valve (17), the electric hair dryer structure (20), the pump body (24), and the micro motor (26) by telecommunication.

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