Rare earth metal deoxidation device and deoxidation method

Abstract

The invention belongs to the technical field of rare earth processing, and particularly relates to a rare earth metal deoxidation device and method.The rare earth metal deoxidation device comprises a molten salt furnace, a plurality of auxiliary material adding mechanisms are annularly arranged on the lower portion in the molten salt furnace, each auxiliary material adding mechanism comprises a T-shaped switch piece, a pressure spring, a material guiding assembly and a gas guiding assembly, and a first sliding groove and a second sliding groove are formed in the side wall of the molten salt furnace; the T-shaped switch piece is arranged in the first sliding groove and the second sliding groove in a sliding mode and extends towards the interior of the molten salt furnace, and the pressure spring is arranged in the second sliding groove and connected with the lower end of the T-shaped switch piece. The material guiding assembly is connected with the material agent box, the gas guiding assembly is connected with the gas conveying box, and when the T-shaped switch piece slides downwards, the material guiding assembly is communicated with the interior of the molten salt furnace through the communicating hole site and the first sliding groove in sequence. According to the invention, a plurality of auxiliary material adding mechanisms are adopted to change the adding mode of the deoxidizing agent from the aspect of mode, and the deoxidizing agent is directly introduced from the molten salt system to prevent the deoxidizing effect of the rare earth metal from being reduced due to an oxidation reaction between the deoxidizing agent and oxygen in the atmosphere at a high speed.

Description

Technical Field

[0001] The invention belongs to the technical field of rare earth processing, and in particular relates to a rare earth metal deoxidation device and a deoxidation method. Background Art

[0002] Rare earth metals, also known as rare earth elements, are the general term for 17 elements in the IIIB group of the periodic table, including scandium, yttrium, and lanthanide. They are usually represented by R or RE. From the discovery of the first rare earth element yttrium in 1794 to the discovery of the natural rare earth element promethium in 1972, it took 178 years for people to find all 17 rare earth elements in nature. The luster of rare earth metals is between that of silver and iron. Rare earth metals are very chemically active.

[0003] With the development of new technologies and processes, it is extremely important to purify rare earth metals. Impurities in rare earth metals are divided into substitutional impurities and interstitial impurities according to their occurrence state. The former mainly includes metallic impurities and some non-metallic impurities, and the latter are mainly oxygen impurities dissolved in the rare earth metal matrix in atomic form. Due to the strong chemical activity of rare earth metals, it is difficult to remove oxygen impurities. The molten salt extraction method is one of the ways to remove oxygen impurities. However, in the prior art, a deoxidizer is usually sprayed on the surface of a molten salt system to deoxidize the rare earth metals. The deoxidizer has a hysteresis and is easily oxidized by oxygen in the atmosphere, thereby reducing the deoxidation effect of the rare earth metal. The poor fusion of the deoxidizer and the molten salt system also affects the deoxidation efficiency of the rare earth metal. Therefore, based on the above defects, the applicant has proposed a better technical solution to solve the above technical problems.

[0004] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention and should not be regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the invention

[0005] The present invention aims to solve the above technical problems and provides a rare earth metal deoxidation device and a deoxidation method, which mainly solves the technical problems that in the prior art, a deoxidizer is usually sprayed on the surface of a molten salt system to deoxidize the rare earth metal, and the deoxidizer has a hysteresis and is very easy to react with oxygen in the atmosphere to reduce the deoxidation effect of the rare earth metal, and the poor fusion of the deoxidizer and the molten salt system also affects the deoxidation efficiency of the rare earth metal.

[0006] To achieve the above object, the technical solution of the present invention is:

[0007] A rare earth metal deoxidation device comprises a molten salt furnace, wherein a plurality of auxiliary material adding mechanisms are arranged in a circle at the lower part of the molten salt furnace.

[0008] The auxiliary material adding mechanism comprises a T-shaped switch, a pressure spring, a material guide assembly and an air guide assembly. The side wall of the molten salt furnace is provided with a first slide groove and a second slide groove, and the two are connected. The T-shaped switch is slidably arranged in the first slide groove and the second slide groove and extends toward the inside of the molten salt furnace. The pressure spring is arranged in the second slide groove and connected to the lower end of the T-shaped switch. The upper end of the T-shaped switch is provided with a connecting hole.

[0009] The material guiding assembly is arranged in the side wall of the molten salt furnace and extends to the outside to be connected with the material agent box. One end of the gas guiding assembly is connected with the material guiding assembly, and the other end is connected with the gas transmission box. When the T-shaped switch piece slides down, the material guiding assembly is connected with the inside of the molten salt furnace through the connecting hole and the slide groove one in sequence.

[0010] Preferably, the material guiding assembly comprises a material guiding cylinder, a one-way valve and a material guiding pipe, one end of the material guiding cylinder is arranged on the side wall of the molten salt furnace and is connected to the second slide slot, and the other end is connected to the material guiding pipe, the material guiding pipe is connected to the pump body built into the material agent box, and the one-way valve is arranged on the material guiding cylinder.

[0011] Preferably, the air guide component includes air pipe one, one-way valve two and air pipe two, one end of air pipe one is connected to the material guide cylinder, and the other end is connected to air pipe two, air pipe two is connected to the pump body built into the air transmission box, and one-way valve two is arranged on air pipe one.

[0012] Preferably, the molten salt furnace is detachably connected to a cover body, the cover body is provided with a driving assembly, a placement rack and multiple groups of deoxidation assemblies rotatably connected to the placement rack, the driving assembly and the placement rack are respectively arranged at the upper and lower ends of the cover body, and multiple groups of the deoxidation assemblies are meshed and connected to the driving assembly.

[0013] Preferably, the placement rack comprises an upper base plate and a lower base plate, the upper base plate and the lower base plate are connected to the cover body through connecting columns, a plurality of groups of the deoxidation components are rotatably connected between the upper base plate and the lower base plate, and the lower base plate abuts against the T-type switch member.

[0014] Preferably, the driving assembly includes a driving motor, a rotating shaft and a driving gear. The driving motor is arranged on the cover body, and its output end is connected to the rotating shaft. The rotating shaft passes through the upper base plate and is rotatably connected to the lower base plate. The driving gear is sleeved on the rotating shaft.

[0015] Preferably, the deoxidation component includes a plurality of rare earth metal components meshingly connected to each other, and the rare earth metal components include a driven gear, a rotating shaft, a connecting plate and a rare earth metal rod. The rotating shaft is rotatably connected to the upper base plate, the driven gear is arranged on the rotating shaft, the connecting plate is arranged at the lower end of the rotating shaft, the rare earth metal rod is rotatably connected between the connecting plate and the lower base plate, and one of the driven gears close to the rotating shaft is meshedly connected to the driving gear.

[0016] Preferably, the present invention further comprises a gantry, a rail trolley is slidably connected to the gantry, a hydraulic cylinder is provided on the rail trolley, and a telescopic end of the hydraulic cylinder extends downwardly and is connected to the cover body through a connecting frame.

[0017] Preferably, a stirring assembly is provided at the bottom end of the molten salt furnace, and the stirring assembly includes a stirring motor, a turntable and a plurality of stirring blades. The stirring motor is provided at the lower end of the molten salt furnace, and its output end is connected to the turntable. The turntable is rotatably connected to the bottom end of the molten salt furnace, and a plurality of stirring blade spacer rings are provided on the turntable.

[0018] A deoxidation method, using any one of the rare earth metal deoxidation devices described above, comprising the following steps:

[0019] (a) preparing a molten salt system, placing the molten salt system in a molten salt furnace, and heating it to 700-1700° C.;

[0020] (b) installing rare earth metal rods, placing a plurality of rare earth metal rods on a placement rack and driving the cover body to be lowered into the molten salt furnace by a hydraulic cylinder until the lower base plate abuts against the T-shaped switch member, and the T-shaped switch member slides down so that the material guide cylinder is connected to the inside of the molten salt furnace through the connecting hole and the slide groove one in sequence,

[0021] (c) guiding materials and gases, wherein the deoxidizer is introduced into the molten salt furnace through the material box; the argon gas is introduced into the molten salt furnace through the gas transmission box, and the two are mixed into the molten salt system through the stirring assembly;

[0022] (d) Deoxidizing rare earth metal rods: start the driving motor to drive the rare earth metal rods to rotate in the molten salt system to maintain the deoxidized state for 20-40 hours. After the molten salt system is cooled to room temperature, start the hydraulic cylinder to drive the cover body to move up, and then take it away to the outside of the molten salt furnace via a rail trolley. Grind the surface of the rare earth metal rod and take samples to analyze the oxygen content.

[0023] Due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0024] The present invention provides a rare earth metal deoxidation device and a deoxidation method, which have a simple structure and are easy to use. A plurality of auxiliary material adding mechanisms are used to change the adding method of the deoxidizer, and the deoxidizer is directly introduced from the molten salt system to prevent the deoxidizer from reacting with oxygen in the atmosphere at a very fast speed to reduce the deoxidation effect of the rare earth metal. In addition, the deoxidizer and the molten salt system can be better integrated by driving the deoxidation component to rotate, and the rare earth metal rods in the deoxidation component can be better deoxidized, thereby improving the deoxidation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the present invention;

[0026] Figure 2 for Figure 1 A magnified schematic diagram of point A;

[0027] Figure 3 for Figure 1 An enlarged schematic diagram of point B;

[0028] Figure 4 A top view of the upper substrate.

[0029] The main component symbols in the figure are explained as follows:

[0030] 1. Molten salt furnace; 11. Chute 1; 12. Chute 2; 2. Auxiliary material adding mechanism; 21. T-type switch; 211. Connecting hole; 22. Pressure spring; 23. Material guide assembly; 231. Material guide cylinder; 232. One-way valve 1; 233. Material guide pipe; 24. Air guide assembly; 241. Air pipe 1; 242. One-way valve 2; 243. Air pipe 2; 4. Driving assembly; 41. Driving motor; 42. Rotating shaft; 43. Driving gear; 5. Placement Frame; 51, upper base plate; 52, lower base plate; 6, deoxidation component; 61, rare earth metal component; 611, driven gear; 612, rotating shaft; 613, connecting piece; 614, rare earth metal rod; 7, gantry; 8, rail trolley; 9, stirring component; 91, stirring motor; 92, turntable; 93, stirring blade; 100, material box; 200, air box; 300, cover body; 400, connecting column; 500, connecting frame; 600, hydraulic cylinder. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Example

[0033] like Figures 1 to 4 As shown, a rare earth metal deoxidation device comprises a molten salt furnace 1, wherein a plurality of auxiliary material adding mechanisms 2 are arranged in a ring at the lower part of the molten salt furnace 1, wherein the auxiliary material adding mechanism 2 comprises a T-shaped switch member 21, a pressure spring 22, a material guiding assembly 23 and a gas guiding assembly 24, wherein a chute 11 and a chute 2 12 are provided on a side wall of the molten salt furnace 1, and the two are connected, wherein the T-shaped switch member 21 is slidably arranged in the chute 1 1 and the chute 2 12 and extends toward the inside of the molten salt furnace 1, the pressure spring 22 is arranged in the chute 2 12 and is connected to the lower end of the T-shaped switch member 21, and a connecting hole 211 is provided on the upper end of the T-shaped switch member 21, the material guiding assembly 23 is arranged in the side wall of the molten salt furnace 1 and extends to the outside to be connected to the material agent box 100, one end of the gas guiding assembly 24 is connected to the material guiding assembly 23, and the other end is connected to the gas transmission box 200, and when the T-shaped switch member 21 slides down, the material guiding assembly 23 is connected to the inside of the molten salt furnace 1 through the connecting hole 211 and the chute 1 11 in sequence.

[0034] In this embodiment, four auxiliary material adding mechanisms 2 are arranged in a circular array; a T-shaped switch 21 is arranged in the auxiliary material adding mechanism 2 and is slidably arranged in the slide slot 1 11 and the slide slot 2 12, and can be controlled to be opened or closed by the placement rack 5 mentioned later, so that the material guide component 23 and the gas guide component 24 can be better controlled to introduce the deoxidizer and argon gas into the molten salt furnace 1 to optimize the structural performance; the present invention adopts multiple auxiliary material adding mechanisms 2 to change the adding method of the deoxidizer, and directly introduces the deoxidizer from the molten salt system to prevent the deoxidizer from reacting with oxygen in the atmosphere at a very fast speed to reduce the deoxidation effect of the rare earth metal.

[0035] In this embodiment, please refer to Figure 2 The material guiding assembly 23 includes a material guiding cylinder 231, a one-way valve 232 and a material guiding pipe 233. One end of the material guiding cylinder 231 is arranged on the side wall of the molten salt furnace 1 and is connected to the chute 2 12, and the other end is connected to the material guiding pipe 233. The material guiding pipe 233 is connected to the pump body built into the material box 100, and the one-way valve 232 is arranged on the material guiding cylinder 231. During operation, the T-shaped switch member 21 slides down, and the material guiding cylinder 231 is connected to the connecting hole 211 and the chute 11 in turn, thereby connecting the material guiding cylinder 231 and the molten salt furnace 1, which is convenient for the subsequent introduction of the deoxidizer from the material box 100.

[0036] The gas guide component 24 includes an air pipe 1 241, a one-way valve 242 and an air pipe 243. One end of the air pipe 1 241 is connected to the material guide cylinder 231, and the other end is connected to the air pipe 243. The air pipe 243 is connected to the pump body built into the gas transmission box 200, and the one-way valve 242 is arranged on the air pipe 1 241. During operation, it works in the same way as the material guide component 23 described above. Argon is stored in the gas transmission box 200, and argon is introduced into the molten salt system to maintain a slightly positive pressure state of the molten salt system.

[0037] In the present embodiment, the molten salt furnace 1 is detachably connected to a cover body 300, on which a driving assembly 4, a placement rack 5 and a plurality of deoxidation assemblies 6 rotatably connected to the placement rack 5 are provided. The driving assembly 4 and the placement rack 5 are respectively arranged at the upper and lower ends of the cover body 300, and the plurality of deoxidation assemblies 6 are meshedly connected to the driving assembly 4. In this article, the driving assembly 4 is used to drive the deoxidation assembly 6 to rotate, so that the deoxidizer and the molten salt system can be better integrated, and at the same time, the rare earth metal rods 614 mentioned below in the deoxidation assembly 6 can be better deoxidized, thereby improving the deoxidation efficiency.

[0038] For details, please refer to Figure 3 and Figure 4 The placement rack 5 includes an upper base plate 51 and a lower base plate 52, which are connected to the cover body 300 through a connecting column 400, and multiple groups of deoxidation components 6 are rotatably connected between the upper base plate 51 and the lower base plate 52, and the lower base plate 52 abuts against the T-type switch component 21; when the placement rack is lowered, the lower base plate 52 can control the T-type switch component 21 to open or close, so as to better control the material guide component 23 and the gas guide component 24 to introduce deoxidizer and argon gas into the molten salt furnace 1.

[0039] The driving assembly 4 includes a driving motor 41, a rotating shaft 42 and a driving gear 43. The driving motor 41 is arranged on the cover body 300, and its output end is connected to the rotating shaft 42. The rotating shaft 42 passes through the upper base plate 51 and is rotatably connected to the lower base plate 52. The driving gear 43 is sleeved on the rotating shaft 42.

[0040] The deoxidation component 6 includes a plurality of rare earth metal components 61 meshed with each other, and the rare earth metal component 61 includes a driven gear 611, a rotating shaft 612, a connecting piece 613 and a rare earth metal rod 614. The rotating shaft 612 is rotatably connected to the upper base plate 51, the driven gear 611 is arranged on the rotating shaft 612, the connecting piece 613 is arranged at the lower end of the rotating shaft 612, and the rare earth metal rod 614 is rotatably connected between the connecting piece 613 and the lower base plate 52. A driven gear 611 close to the rotating shaft 42 is meshed with the driving gear 43; during specific operation, the driving gear 43 rotates to drive the driven gear 611 meshed with it, and the driven gear 611 drives other driven gears 611 to rotate, thereby realizing the self-rotation of the rare earth metal rod 614 and improving the final deoxidation effect.

[0041] In this embodiment, the present invention further comprises a gantry 7, on which a rail trolley 8 is slidably connected, and on which a hydraulic cylinder 600 is provided, and a telescopic end of the hydraulic cylinder 600 extends downward and is connected to the cover body 300 through a connecting frame 500.

[0042] In this embodiment, a stirring assembly 9 is provided at the bottom end of the molten salt furnace 1. The stirring assembly 9 includes a stirring motor 91, a turntable 92 and a plurality of stirring blades 93. The stirring motor 91 is provided at the lower end of the molten salt furnace 1, and its output end is connected to the turntable 92. The turntable 92 is rotatably connected to the bottom end of the molten salt furnace 1, and a plurality of stirring blades 93 are provided on the turntable 92 with spacer rings. Stirring the molten salt system by using the stirring assembly 9 can better integrate the deoxidizer and the molten salt system, thereby better improving the deoxidation effect of the rare earth metal rod 614 and improving work efficiency.

[0043] This embodiment also includes a control system, and the one-way valve 1 232, one-way valve 242, drive motor 41 and stirring motor 91 mentioned in the text are all electrically connected to it. The specific connection relationship belongs to conventional technical means and will not be elaborated in detail here.

[0044] A method for deoxidizing a rare earth metal in this embodiment comprises the following steps:

[0045] (a) preparing a molten salt system, placing the molten salt system in a molten salt furnace 1, and heating it to 700-1700° C.;

[0046] (b) installing rare earth metal rods 614, installing a plurality of rare earth metal rods 614 on the placement rack 5 and driving the cover 300 to be lowered into the molten salt furnace 1 by the hydraulic cylinder 600, until the lower base plate 52 abuts against the T-shaped switch member 21, and the T-shaped switch member 21 slides down so that the material guide cylinder 231 is connected to the inside of the molten salt furnace 1 through the connecting hole 211 and the slide groove 11 in sequence,

[0047] (c) Material and gas guiding: the material box 100 guides the deoxidizer into the molten salt furnace 1; the gas box 200 guides the argon gas into the molten salt furnace 1, and the stirring assembly 7 mixes the two into the molten salt system. The amount of the deoxidizer and the argon gas is determined by the volume of the molten salt system;

[0048] (d) Deoxidizing the rare earth metal rod 614, starting the drive motor 41 to drive the rare earth metal rod 614 to rotate in the molten salt system to maintain the deoxidation state for 20-40 hours, and then after the molten salt system is cooled to room temperature, starting the hydraulic cylinder 600 to drive the cover body 300 to move up, and then being taken away to the outside of the molten salt furnace 1 by the rail trolley 8, and grinding the surface of the rare earth metal rod 614 to take samples for analysis of oxygen content.

[0049] The present invention provides a rare earth metal deoxidation device and a deoxidation method, which adopts multiple auxiliary material adding mechanisms 2 to change the adding method of the deoxidizer, and directly introduces the deoxidizer from the molten salt system to prevent the deoxidizer from reacting with oxygen in the atmosphere at a very fast speed to reduce the deoxidation effect of the rare earth metal; in addition, the driving component 4 is used to drive the deoxidation component 6 to rotate, so that the deoxidizer and the molten salt system can be better integrated, and at the same time, the rare earth metal rods in the deoxidation component 6 can be better deoxidized to improve the deoxidation efficiency.

[0050] The above description is a detailed description of the preferred feasible embodiments of the present invention, but the embodiments are not intended to limit the scope of the patent application of the present invention. All equivalent changes or modified changes completed under the technical spirit suggested by the present invention should fall within the patent scope covered by the present invention.

Claims

1. A rare earth metal deoxidation device, characterized in that: The invention comprises a molten salt furnace (1), wherein a plurality of auxiliary material adding mechanisms (2) are arranged in a circle at the lower part of the molten salt furnace (1). The auxiliary material adding mechanism (2) comprises a T-shaped switch member (21), a pressure spring (22), a material guide assembly (23) and an air guide assembly (24); a chute 1 (11) and a chute 2 (12) are provided on a side wall of the molten salt furnace (1), and the two chute 1 (11) and the two chute 2 (12) are connected; the T-shaped switch member (21) is slidably arranged in the chute 1 (11) and the chute 2 (12) and extends toward the inside of the molten salt furnace (1); the pressure spring (22) is arranged in the chute 2 (12) and connected to the lower end of the T-shaped switch member (21); a connecting hole (211) is provided at the upper end of the T-shaped switch member (21); The material guide component (23) is arranged in the side wall of the molten salt furnace (1) and extends to the outside to be connected to the material agent box (100); one end of the gas guide component (24) is connected to the material guide component (23), and the other end is connected to the gas transmission box (200); when the T-shaped switch member (21) slides down, the material guide component (23) is connected to the inside of the molten salt furnace (1) through the connecting hole (211) and the slide groove (11) in sequence.

2. A rare earth metal deoxidation device as claimed in claim 1, characterized in that: The material guiding assembly (23) comprises a material guiding cylinder (231), a one-way valve (232) and a material guiding pipe (233); one end of the material guiding cylinder (231) is arranged on the side wall of the molten salt furnace (1) and is connected to the second chute (12); the other end is connected to the material guiding pipe (233); the material guiding pipe (233) is connected to a pump body built into the material agent box (100); and the one-way valve (232) is arranged on the material guiding cylinder (231).

3. A rare earth metal deoxidation device as claimed in claim 2, characterized in that: The air guide component (24) comprises an air pipe one (241), a one-way valve two (242) and an air pipe two (243); one end of the air pipe one (241) is connected to the material guide cylinder (231), and the other end is connected to the air pipe two (243); the air pipe two (243) is connected to a pump body built into the air delivery box (200); and the one-way valve two (242) is arranged on the air pipe one (241).

4. A rare earth metal deoxidation device as claimed in claim 1, characterized in that: The molten salt furnace (1) is detachably connected to a cover body (300), and the cover body (300) is provided with a driving assembly (4), a placement rack (5) and a plurality of groups of deoxidation assemblies (6) rotatably connected to the placement rack (5). The driving assembly (4) and the placement rack (5) are respectively arranged at the upper and lower ends of the cover body (300), and a plurality of groups of the deoxidation assemblies (6) are meshedly connected to the driving assembly (4).

5. A rare earth metal deoxidation device as claimed in claim 4, characterized in that: The placement rack (5) comprises an upper base plate (51) and a lower base plate (52), wherein the upper base plate (51) and the lower base plate (52) are connected to the cover body (300) via a connecting column (400), and a plurality of groups of deoxidation components (6) are rotatably connected between the upper base plate (51) and the lower base plate (52), and the lower base plate (52) abuts against the T-type switch member (21).

6. A rare earth metal deoxidation device as claimed in claim 5, characterized in that: The driving assembly (4) comprises a driving motor (41), a rotating shaft (42) and a driving gear (43); the driving motor (41) is arranged on the cover body (300), and an output end thereof is connected to the rotating shaft (42); the rotating shaft (42) passes through the upper base plate (51) and is rotatably connected to the lower base plate (52); and the driving gear (43) is sleeved on the rotating shaft (42).

7. A rare earth metal deoxidation device as claimed in claim 6, characterized in that: The deoxidation component (6) comprises a plurality of rare earth metal components (61) meshed with each other, wherein the rare earth metal component (61) comprises a driven gear (611), a rotating shaft (612), a connecting piece (613) and a rare earth metal rod (614); the rotating shaft (612) is rotatably connected to the upper base plate (51); the driven gear (611) is arranged on the rotating shaft (612); the connecting piece (613) is arranged at the lower end of the rotating shaft (612); the rare earth metal rod (614) is rotatably connected between the connecting piece (613) and the lower base plate (52); and one of the driven gears (611) close to the rotating shaft (42) is meshed with the driving gear (43).

8. A rare earth metal deoxidation device as claimed in claim 4, characterized in that: It also includes a gantry (7), a rail trolley (8) is slidably connected to the gantry (7), a hydraulic cylinder (600) is provided on the rail trolley (8), and a telescopic end of the hydraulic cylinder (600) extends downward and is connected to the cover body (300) through a connecting frame (500).

9. A rare earth metal deoxidation device as claimed in claim 1, characterized in that: A stirring assembly (9) is provided at the bottom end of the molten salt furnace (1), and the stirring assembly (9) comprises a stirring motor (91), a turntable (92) and a plurality of stirring blades (93). The stirring motor (91) is provided at the lower end of the molten salt furnace (1), and its output end is connected to the turntable (92). The turntable (92) is rotatably connected to the bottom end of the molten salt furnace (1), and a plurality of stirring blades (93) are spaced apart on the turntable (92).

10. A deoxidation method, using the rare earth metal deoxidation device according to any one of claims 1 to 9, characterized in that: The following steps are involved: (a) preparing a molten salt system, placing the molten salt system in a molten salt furnace (1) and heating it to 700-1700° C.; (b) installing rare earth metal rods (614), installing a plurality of rare earth metal rods (614) on a placement rack (5) and driving the cover body (300) to be lowered into the molten salt furnace (1) by means of a hydraulic cylinder (600), until the lower base plate (52) abuts against the T-shaped switch member (21), and the T-shaped switch member (21) slides down, thereby allowing the material guide cylinder (231) to be connected to the interior of the molten salt furnace (1) through the connecting hole (211) and the slide groove (11) in sequence, (c) guiding materials and gases, wherein the deoxidizer is introduced into the molten salt furnace (1) through the material box (100); argon gas is introduced into the molten salt furnace (1) through the gas transmission box (200), and the two are mixed evenly into the molten salt system through the stirring component (9); (d) Deoxidizing the rare earth metal rod (614), starting the driving motor (41) to drive the rare earth metal rod (614) to rotate in the molten salt system to maintain the deoxidized state for 20-40 hours, and then after the molten salt system is cooled to room temperature, starting the hydraulic cylinder (600) to drive the cover body (300) to move upward, and then taking it away to the outside of the molten salt furnace (1) via the rail trolley (8), grinding the surface of the rare earth metal rod (614) and sampling and analyzing the oxygen content.

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