Vacuum thermal reduction preparation equipment for rare earth metal

Abstract

The utility model relates to the technical field of rare earth metal preparation, and discloses rare earth metal vacuum thermal reduction preparation equipment which comprises a crucible body, a feeding port used for feeding is formed in one end of the top of the crucible body, and a discharging port used for discharging is formed in the axial position of the bottom of the crucible body. A heating structure for heating is arranged in the crucible body; the cooling structure is arranged on the outer wall of the crucible body and used for injecting and discharging cooling water, and a water inlet and a water outlet are formed in the cooling structure; a protective structure; and a stirring assembly. According to the stirring device disclosed by the utility model, raw materials can be synchronously stirred in two directions through the arranged stirring assembly, so that the raw materials are prevented from being layered under inertia when being stirred in one direction, the stirring and mixing effects are influenced, the reaction efficiency of the raw materials is influenced, and the preparation efficiency of the raw materials is further influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of rare earth metal preparation, in particular to a device for preparing rare earth metal by vacuum thermal reduction. Background Art

[0002] Rare earth metals are elements with scarce mining. Rare earths have relatively wide uses and are effectively utilized in industrial fields such as metallurgy and petrochemical industry.

[0003] After retrieval, the application number "201921252061.1" discloses a device for preparing rare earth metal by vacuum thermal reduction, including the inner wall of a crucible. A heating layer is fixedly connected to the outside of the inner wall of the crucible. A cooling layer is fixedly connected to the outside of the heating layer. A heat insulation layer is fixedly connected to the outside of the cooling layer. A protective gas inlet is opened on the left side of the inner wall of the crucible. A thermometer is fixedly connected to the left side of the inner wall of the crucible. A barometer is fixedly connected to the right side of the inner wall of the crucible. An air evacuator is fixedly connected to the right side of the inner wall of the crucible. A transmission shaft is fixedly connected to the inside of the inner wall of the crucible. Stirring blades are fixedly connected to the outside of the transmission shaft. An induction coil is fixedly connected to the inside of the heating layer. This device for preparing rare earth metal by vacuum thermal reduction adopts the induction heating method, which is energy-efficient and easy to control the temperature. Three air evacuation devices are added, which can strongly evacuate the air inside the device to within a limited range.

[0004] When this technical solution is used, a stirring device is needed to stir and mix the raw materials to improve the reaction efficiency of the raw materials. However, this stirring device can only stir and mix the raw materials in one direction, and the raw materials are prone to stratification due to the inertia of stirring, affecting the mixing effect, and then affecting the reaction efficiency of the raw materials and the preparation efficiency.

[0005] Therefore, we propose a device for preparing rare earth metal by vacuum thermal reduction. Content of the Utility Model

[0006] The utility model mainly solves the technical problem that the poor mixing effect of raw materials affects the preparation efficiency, and provides a device for preparing rare earth metal by vacuum thermal reduction.

[0007] In order to achieve the above purpose, the utility model adopts the following technical scheme. A device for preparing rare earth metal by vacuum thermal reduction includes:

[0008] A crucible body. One end of the top of the crucible body is provided with a feed inlet for feeding. The axial position at the bottom of the crucible body is provided with a discharge outlet for discharging. A heating structure for heating up is arranged inside the crucible body;

[0009] A cooling structure. The cooling structure is arranged on the outer wall of the crucible body for injecting and discharging cooling water. The cooling structure includes a water inlet and a water outlet;

[0010] A protective structure is provided on the outer wall of the crucible body for gas injection and extraction. The protective structure includes a protective gas inlet and an air evacuator.

[0011] A stirring assembly is arranged at the axial position of the crucible body. The stirring assembly includes a servo motor for driving and a stirring shaft. The stirring assembly is also provided with a first stirring blade and a second stirring blade for stirring and mixing.

[0012] Furthermore, the servo motor is fixedly connected to the axial position at the top of the crucible body through a motor bracket. The top end of the stirring shaft is fixedly connected to the output end of the servo motor. At the bottom of the crucible body at the discharge port, a fixing plate is provided. The fixing plate is provided with a plurality of overflow grooves arranged in a circular pattern and communicated with the discharge port. The bottom end of the stirring shaft is rotatably connected to the top of the fixing plate. The first stirring blades are linearly arranged and fixedly connected to both ends of the outer wall of the stirring shaft.

[0013] Furthermore, a through rotating hole is provided in the first stirring blade, and the rotating hole extends to the inner wall of the stirring shaft. A transmission shaft is rotatably connected to the inner wall of the rotating hole. The second stirring blades are circularly arranged and fixedly connected to the end of the transmission shaft away from the stirring shaft.

[0014] Furthermore, a through hole is provided at the bottom end of the stirring shaft. A fixing rod is arranged in the through hole. The bottom end of the fixing rod passes through the through hole and is fixedly connected to the fixing plate. The top end of the fixing rod is rotatably connected to the inner wall of the top of the stirring shaft. A plurality of first bevel gears arranged linearly are fixedly connected to the outer wall of the fixing rod. A second bevel gear meshing with the first bevel gear is fixedly connected to the axial position near the fixing rod at the end of the transmission shaft.

[0015] Furthermore, the water inlet is arranged at the bottom end position of the outer wall of the crucible body, the water outlet is arranged at the top position of the outer wall on the other side of the crucible body, and the protective gas inlet and the air evacuator are arranged at the middle position of the outer walls at both ends of the crucible body.

[0016] Furthermore, a plurality of pressure relief holes arranged in a matrix are provided on the outer wall of the second stirring blade. The pressure relief holes are columnar grooves with both ends of the cross section being arc-shaped. Beneficial effects

[0017] The utility model provides a device for vacuum thermal reduction preparation of rare earth metals. It has the following beneficial effects:

[0018] (1) For the device for vacuum thermal reduction preparation of rare earth metals, through the arranged stirring assembly, the raw materials can be stirred synchronously in two directions, avoiding stratification of the raw materials under inertia during stirring in one direction, which affects the stirring and mixing effect, the reaction efficiency of the raw materials, and further affects the preparation efficiency of the raw materials.

[0019] (2) The equipment for preparing rare earth metals by vacuum thermal reduction can discharge a part of the raw materials through the pressure relief holes, avoiding excessive stress on the second stirring fan blade, which may cause the second stirring fan blade to jam and affect the stirring and mixing effect of the raw materials. Moreover, due to its arc design, the upper contact surface of the raw materials is a smooth curved surface, reducing the friction between the two and preventing the raw materials from getting stuck in the pressure relief holes and affecting the pressure relief effect. Description of the Drawings

[0020] Figure 1 It is the front view of the present utility model;

[0021] Figure 2 It is the sectional view of the present utility model;

[0022] Figure 3 It is the present utility model Figure 2 Enlarged view of part A;

[0023] Figure 4 It is the sectional view of the second stirring fan blade in the second embodiment of the present utility model.

[0024] Legend: 1. Crucible body; 2. Feed inlet; 3. Servo motor; 4. Air evacuator; 5. Water outlet; 6. Water inlet; 7. Inlet for protective gas; 8. Discharge outlet; 9. Stirring shaft; 10. First stirring fan blade; 11. Second stirring fan blade; 12. Fixed rod; 13. First bevel gear; 14. Second bevel gear; 15. Transmission shaft; 16. Pressure relief hole. Detailed Description of the Embodiment

[0025] Embodiment 1: An equipment for preparing rare earth metals by vacuum thermal reduction, as Figure 1 and Figure 2 shown, includes

[0026] a crucible body 1, one end at the top of the crucible body 1 is provided with a feed inlet 2 for feeding, the axial position at the bottom of the crucible body 1 is provided with a discharge outlet 8 for discharging, and a heating structure for heating up is arranged inside the crucible body 1;

[0027] a cooling structure, which is arranged on the outer wall of the crucible body 1 for injecting and discharging cooling water, and the cooling structure includes a water inlet 6 and a water outlet 5 inside;

[0028] a protection structure, which is arranged on the outer wall of the crucible body 1 for injecting and extracting gas, and the protection structure includes a protective gas inlet 7 and an air evacuator 4 inside;

[0029] a stirring assembly, which is arranged at the axial position of the crucible body 1, the stirring assembly includes a servo motor 3 for driving and a stirring shaft 9, and the stirring assembly is also provided with a first stirring fan blade 10 and a second stirring fan blade 11 for stirring and mixing.

[0030] The servo motor 3 is fixedly connected to the axial position at the top of the crucible body 1 through a motor bracket. The top end of the stirring shaft 9 is fixedly connected to the output end of the servo motor 3. At the bottom of the crucible body 1 at the discharge port 8, a fixed plate is provided. The fixed plate is provided with a plurality of overflow grooves arranged in a circular pattern and communicated with the discharge port 8. The bottom end of the stirring shaft 9 is rotatably connected to the top position of the fixed plate. The first stirring blades 10 are linearly arranged and fixedly connected to both ends of the outer wall of the stirring shaft 9.

[0031] A through rotation hole is provided in the first stirring blade 10, and the rotation hole extends to the inner wall of the stirring shaft 9. A transmission shaft 15 is rotatably connected to the inner wall of the rotation hole. The second stirring blades 11 are fixedly connected to one end of the transmission shaft 15 far from the stirring shaft 9 in a circular arrangement.

[0032] As Figure 2 and Figure 3 shown, a through hole is provided at the bottom end of the stirring shaft 9. A fixing rod 12 is arranged in the through hole. The bottom end of the fixing rod 12 passes through the through hole and is fixedly connected to the fixed plate. The top end of the fixing rod 12 is rotatably connected to the inner wall of the top of the stirring shaft 9. A plurality of first bevel gears 13 linearly arranged are fixedly connected to the outer wall of the fixing rod 12. A second bevel gear 14 meshing with the first bevel gear 13 is fixedly connected to the axial position of one end of the transmission shaft 15 close to the fixing rod 12.

[0033] The water inlet 6 is arranged at the bottom end position of the outer wall of the crucible body 1, the water outlet 5 is arranged at the top position of the outer wall on the other side of the crucible body 1, and the protective gas inlet 7 and the air evacuator 4 are arranged at the middle position of the outer walls at both ends of the crucible body 1.

[0034] In summary, through the arranged stirring assembly, the raw materials can be stirred synchronously in two directions, avoiding stratification of the raw materials under inertia when stirred in one direction, affecting the stirring and mixing effect, the reaction efficiency of the raw materials, and further affecting the preparation efficiency of the raw materials.

[0035] Embodiment 2: On the basis of Embodiment 1, referring to Figure 4 , a plurality of pressure relief holes 16 arranged in a matrix are provided on the outer wall of the second stirring blade 11. The pressure relief holes 16 are columnar grooves with both ends of the cross section being arc-shaped.

[0036] Through the arranged pressure relief holes 16, a part of the raw materials can be discharged through the pressure relief holes 16, avoiding excessive stress on the second stirring blade 11 and causing jamming of the second stirring blade 11, affecting the stirring and mixing effect of the raw materials. And with its arc design, the contact surface of the raw materials passing through it is a smooth curved surface, reducing the friction between the two and avoiding the raw materials from getting stuck in the pressure relief holes 16 and affecting its pressure relief effect.

[0037] Working principle of the utility model: When preparation is required, raw materials are added into the crucible body 1 through the feed port 2. The servo motor 3 is started, and the servo motor 3 can drive the first stirring fan blade 10 and the second stirring fan blade 11 thereon to rotate through the stirring shaft 9, so as to stir the raw materials. There is relative rotation between the transmission shaft 15 on the first stirring fan blade 10 and the fixed rod 12 fixed on the fixing plate, and the transmission shaft 15 can be driven to rotate self by the first bevel gear 13 and the second bevel gear 14 which are meshed with each other, and then drive the second stirring fan blade 11 thereon to rotate self. The first stirring fan blade 10 and the second stirring fan blade 11 stir the raw materials in two directions. Then, the crucible body 1 is evacuated by the air evacuator 4, the raw materials are heated by the heating structure, and argon is introduced from the protective gas inlet 7 for reaction reduction. After completion, cooling water is injected through the water inlet 6 and discharged through the water outlet 5 to cool down the inside of the crucible body 1, and thus the preparation is completed.

[0038] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the utility model claimed. The scope of protection claimed by the utility model is defined by the appended claims and their equivalents.

Claims

1. A rare earth metal vacuum thermal reduction preparation device, characterized in that: include: A crucible body (1), wherein a feeding port (2) for feeding materials is arranged at one end of the top of the crucible body (1), a discharge port (8) for discharging materials is arranged at an axial position at the bottom of the crucible body (1), and a heating structure for heating is arranged inside the crucible body (1); A cooling structure, the cooling structure being arranged on the outer wall of the crucible body (1) and used for injecting and discharging cooling water, the cooling structure comprising a water inlet (6) and a water outlet (5); A protective structure, the protective structure being arranged on the outer wall of the crucible body (1) and used for injecting and extracting gas, the protective structure comprising a protective gas inlet (7) and an air evacuator (4); A stirring assembly is arranged at an axial position of the crucible body (1), the stirring assembly comprises a servo motor (3) and a stirring shaft (9) for driving, and the stirring assembly is also provided with a first stirring blade (10) and a second stirring blade (11) for stirring and mixing.

2. The rare earth metal vacuum thermal reduction preparation equipment according to claim 1, characterized in that: The servo motor (3) is fixedly connected to the axial position of the top of the crucible body (1) through a motor frame, the top of the stirring shaft (9) is fixedly connected to the output end of the servo motor (3), the bottom of the crucible body (1) is located at the discharge port (8) and a fixed plate is provided, the fixed plate is provided with a plurality of overflow grooves arranged in a circumferential manner and connected to the discharge port (8), the bottom end of the stirring shaft (9) is rotatably connected to the top position of the fixed plate, and the first stirring blades (10) are linearly arranged and fixedly connected to the two ends of the outer wall of the stirring shaft (9).

3. The rare earth metal vacuum thermal reduction preparation equipment according to claim 1, characterized in that: A through-going rotating hole is provided in the first stirring blade (10), the rotating hole extending to the inner wall of the stirring shaft (9), the inner wall of the rotating hole being rotatably connected to a transmission shaft (15), and the second stirring blades (11) are arranged in a circle and fixedly connected to an end of the transmission shaft (15) away from the stirring shaft (9).

4. The rare earth metal vacuum thermal reduction preparation equipment according to claim 3, characterized in that: A through hole is formed at the bottom end of the stirring shaft (9), a fixing rod (12) is arranged in the through hole, the bottom end of the fixing rod (12) passes through the through hole and is fixedly connected to the fixing plate, the top end of the fixing rod (12) is rotatably connected to the top inner wall of the stirring shaft (9), a plurality of linearly arranged first bevel gears (13) are fixedly connected to the outer wall of the fixing rod (12), and a second bevel gear (14) meshing with the first bevel gear (13) is fixedly connected to the transmission shaft (15) at an axial position close to one end of the fixing rod (12).

5. The rare earth metal vacuum thermal reduction preparation equipment according to claim 1, characterized in that: The water inlet (6) is arranged at the bottom end of the outer wall of the crucible body (1), the water outlet (5) is arranged at the top of the outer wall on the other side of the crucible body (1), and the protective gas inlet (7) and the air evacuator (4) are arranged at the middle position of the outer walls at both ends of the crucible body (1).

6. The rare earth metal vacuum thermal reduction preparation equipment according to claim 1, characterized in that: A plurality of pressure relief holes (16) arranged in a matrix are provided on the outer wall of the second stirring blade (11), and the pressure relief holes (16) are columnar grooves with arc-shaped cross sections at both ends.

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