A rare earth purification device and method

Abstract

This invention relates to the field of rare earth processing equipment technology, and proposes a rare earth purification device, including a precipitation filtration module and a magnetic separation filtration module connected in sequence. The precipitation filtration module includes a stirring tank with a first feed inlet, a first liquid inlet, and a first discharge outlet; and a heating tank with a first evaporation outlet, a second feed inlet, and a second discharge outlet. The first discharge outlet and the second feed inlet are connected by a pipeline. The magnetic separation filtration module includes a shell with a third feed inlet; a feed hopper is disposed on the shell; the second discharge outlet is connected to the third feed inlet through the feed hopper; and an electromagnetic plate is oscillatingly disposed inside the shell, located below the third feed inlet. Two opposite sidewalls of the electromagnetic plate are either attached to the inner wall of the shell by wear-resistant material or are equipped with baffles. A scraper is movable inside the shell, and after the scraper moves, it pushes the straight plate part away from the electromagnetic plate or disengages from the straight plate part. This technical solution solves the problem of over-selection and under-selection in the prior art of rare earth magnetic separation.

Description

Technical Field

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

[0002] Rare earth is a general term for 17 kinds of metallic elements including lanthanide elements, scandium and yttrium in the periodic table. Rare earth elements are known as the "gold" of industry because of their excellent optical, electromagnetic and other physical properties, and can be combined with other materials to form a wide variety of new materials with different properties. However, rare earth elements are oxygen-affinity, so they mainly exist in ores in nature in the form of oxides and compounds. Therefore, rare earth ores need to be processed and purified to obtain rare earth elements with higher purity.

[0003] In the initial separation and purification process of rare earth ores, the commonly used equipment is a magnetic separator, which separates and purifies the scattered rare earth ores through magnetic force. However, the existing magnetic separator can only achieve the best magnetic separation effect when the rare earth ores are evenly dispersed. When the rare earth ores are relatively moist and there are sticky lumps, the magnetic separator will over-select or miss. In addition, after the rare earth ores are mined, they need to be rinsed, dried, and broken up before being placed in the magnetic separator for separation. This requires multiple sets of equipment to work together, occupies a large area, consumes a lot of energy, and impurities cannot be filtered out well. Therefore, it is necessary to improve the existing purification equipment to solve the above problems. Summary of the invention

[0004] The invention provides a rare earth purification device and method, which solves the problem of over-selection and missed selection in rare earth magnetic separation in the prior art.

[0005] The technical solution of the present invention is as follows:

[0006] A rare earth purification device comprises a sedimentation filtration module and a magnetic separation filtration module connected in sequence, wherein the sedimentation filtration module comprises a stirring tank and a heating tank connected thereto, and the magnetic separation filtration module comprises:

[0007] case,

[0008] A feed hopper is arranged on the shell, and the heating tank is connected to the shell through the feed hopper.

[0009] The electromagnetic plate is swingably arranged in the shell and is located below the third feed port, wherein two opposite side walls of the electromagnetic plate are both fitted with the inner wall of the shell through wear-resistant materials or are both equipped with baffles.

[0010] The limiting plate, the other two opposite side walls of the electromagnetic plate are provided with grooves, the limiting plate has a side plate portion, a straight plate portion and an arc plate portion connected in sequence, the side plate portion has two, which are rotatably arranged in the two grooves respectively, and the straight plate portion abuts against or disengages from the side wall of the electromagnetic plate after swinging,

[0011] The scraper is movably arranged in the shell, with a gap between the scraper and the electromagnetic plate. After the scraper moves, it opens or cancels the opening of the channel between the straight plate part and the side wall of the electromagnetic plate.

[0012] As a further technical solution, the stirring tank has a first feed port, a first liquid inlet and a first discharge port, the heating tank has a first evaporation port, a second feed port and a second discharge port, the first discharge port is connected to the second feed port through a pipeline, the shell has a third feed port, and the second discharge port is connected to the third feed port through the feed hopper.

[0013] As a further technical solution, the magnetic separation and filtration module further includes:

[0014] A driving chamber is arranged in the housing and below the electromagnetic plate.

[0015] A rotating wheel is rotatably arranged in the driving chamber, the rotating axis of the rotating wheel is perpendicular to the rotating axis of the electromagnetic plate, the rotating wheel has a spiral groove, and the spiral groove has a plurality of protrusions,

[0016] A guide column is arranged in the driving chamber and above the rotating wheel, wherein the guide of the guide column is parallel to the rotating axis of the rotating wheel.

[0017] The electric push rod is slidably arranged on the guide column through a guide sleeve, the guide sleeve has a convex portion, the convex portion abuts against the protrusion, and the output end of the electric push rod abuts against the bottom of the electromagnetic plate.

[0018] As a further technical solution, the magnetic separation and filtration module further includes:

[0019] The clamping column is arranged at the output end of the electric push rod, the bottom of the electromagnetic plate has a slide groove, the slide groove has a stop edge, and the clamping column abuts against the stop edge.

[0020] The push rod is hemispherical and is arranged at the output end of the electric push rod. The push rod abuts against the slide groove.

[0021] As a further technical solution, the magnetic separation and filtration module further includes:

[0022] A rare earth collecting chamber is arranged in the housing and located on one side of the driving chamber, wherein an opening of the rare earth collecting chamber is located below one of the arc-shaped plate portions.

[0023] The impurity collection chamber is arranged in the shell and is located at the other side of the driving chamber. The opening of the impurity collection chamber is located below the other arc-shaped plate portion.

[0024] As a further technical solution, the magnetic separation and filtration module further includes:

[0025] The valve is rotatably arranged in the feed hopper. The shell has two third feed ports and two magnetic separation and filtration modules. The feed hopper is connected to the two third feed ports through two pipelines respectively. The valve is used for opening and closing the two pipelines.

[0026] As a further technical solution, the sedimentation and filtration module further comprises:

[0027] The spiral stirring wing is rotatably arranged at the first feed inlet,

[0028] A mixing and stirring rod is rotatably arranged in the stirring tank and is located below the spiral stirring wing.

[0029] A partition is arranged in the housing and below the mixing and stirring rod, and a switch valve is installed on the partition.

[0030] The filter screen is arranged in the shell and is located below the partition.

[0031] As a further technical solution, the sedimentation and filtration module further comprises:

[0032] A stirring scraper is rotatably arranged in the heating tank, the stirring scraper is in contact with the inner wall of the heating tank, and a switch valve is installed at the second discharge port.

[0033] An exhaust fan is rotatably arranged at the first evaporation outlet.

[0034] As a further technical solution, a rare earth purification method is also proposed, comprising the following steps:

[0035] S1, start the spiral stirring wing and the mixing stirring rod, feed the rare earth raw material into the first feed inlet, pour the precipitate into the first liquid inlet, and obtain a mixed liquid;

[0036] S2, open the switch valve on the partition, pump the mixed liquid into the heating tank through the water pump, start the stirring scraper and the exhaust fan to obtain the preliminary purified rare earth crude material;

[0037] S3, start the two electromagnetic plates, open the switch valve at the second discharge port and the valve in the feed hopper, so that the rare earth coarse material continues to fall back and forth on the two electromagnetic plates, and start the two scrapers to evenly spread the rare earth coarse material on the electromagnetic plates;

[0038] S4, start the wheel and the electric push rod, the scraper pushes open the baffle on one side, the electromagnetic plate tilts so that the impurities that are not adsorbed fall into the impurity collection chamber, close the electromagnetic plate, the scraper pushes open the baffle on the other side, the electromagnetic plate tilts so that the adsorbed rare earth material falls into the rare earth collection chamber, and obtains rare earth concentrate.

[0039] The working principle and beneficial effects of the present invention are:

[0040] In the present invention, in order to solve the problem of over-selection and omission in rare earth magnetic separation in the prior art, the inventor proposes a rare earth purification device, which is first dispersed, mixed and dissolved, and evaporated and filtered by a sedimentation filtration device, and then transported to a magnetic separation and filtration module for magnetic separation. The magnetic separation is carried out by electromagnetic separation. The two filtrations can effectively remove impurities contained in the rare earth raw materials, so that the rare earth concentrate screened out has higher accuracy and is convenient for subsequent processing.

[0041] In addition, when the purification device is actually used, it is not necessary to go through sedimentation filtration and then magnetic separation filtration. The two modules can be used in combination or separately, and the best method can be selected according to the actual situation. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0043] Figure 1 It is a schematic diagram of the internal structure of the present invention;

[0044] Figure 2 It is a schematic diagram of the three-dimensional structure of the magnetic separation and filtration module in the present invention;

[0045] Figure 3 It is a schematic diagram of the three-dimensional structure of the electromagnetic plate in the housing in the present invention;

[0046] Figure 4 It is a schematic diagram of the three-dimensional structure of the electromagnetic plate in the present invention;

[0047] Figure 5 This is a schematic diagram of the structure of the magnetic separation and filtration module without the fine material collection chamber in the present invention;

[0048] Figure 6 It is a schematic diagram of the three-dimensional structure of the driving chamber in the present invention;

[0049] Figure 7 for Figure 1 Schematic diagram of the enlarged structure of local A in the middle.

[0050] In the figure: 1. Sedimentation and filtration module, 101. Stirring tank, 102. First feed port, 103. First liquid inlet, 104. First discharge port, 105. Heating tank, 106. First evaporation port, 107. Second feed port, 108. Second discharge port, 109. Spiral stirring wing, 110. Mixing stirring rod, 111. Partition, 112. Filter, 113. Stirring scraper, 114. Exhaust fan, 2. Magnetic separation and filtration module, 201. Shell, 202. Third feed port, 203. Feed Bucket, 204, electromagnetic plate, 205, limit plate, 206, straight plate portion, 207, arc plate portion, 208, side plate portion, 209, groove, 210, valve, 211, scraper, 212, drive chamber, 213, wheel, 214, spiral groove, 215, protrusion, 216, guide column, 217, electric push rod, 218, guide sleeve, 219, convex portion, 220, card plate, 221, slide groove, 222, stop edge, 223, push rod, 224, rare earth collection chamber, 225, impurity collection chamber. DETAILED DESCRIPTION

[0051] The following will be combined with 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.

[0052] like Figure 1 to Figure 7 As shown, this embodiment proposes a rare earth purification device, including a sedimentation filtration module 1 and a magnetic separation filtration module 2 connected in sequence, and the sedimentation filtration module 1 includes:

[0053] The stirring tank 101 has a first feed inlet 102, a first liquid inlet 103 and a first discharge port 104.

[0054] The heating tank 105 has a first evaporation port 106, a second feed port 107 and a second discharge port 108. The first discharge port 104 is connected to the second feed port 107 through a pipeline.

[0055] The magnetic separation and filtration module 2 includes:

[0056] The housing 201 has a third feed port 202.

[0057] The feed hopper 203 is disposed on the housing 201 , and the second discharge port 108 is connected to the third feed port 202 through the feed hopper 203 .

[0058] The electromagnetic plate 204 is swingably disposed in the housing 201 and is located below the third feed port 202. Two opposite side walls of the electromagnetic plate 204 are both attached to the inner wall of the housing 201 through wear-resistant materials or are both equipped with baffles.

[0059] The limiting plate 205 and the other two opposite side walls of the electromagnetic plate 204 are provided with grooves 209, and the limiting plate 205 is rotatably arranged in the grooves 209. The limiting plate 205 has a side plate portion 208, a straight plate portion 206 and an arc plate portion 207 connected in sequence. There are two side plate portions 208, which are rotatably arranged in two grooves 209 respectively. After the straight plate portion 206 swings, it abuts against or disengages from the side wall of the electromagnetic plate 204.

[0060] The scraper 211 is movably arranged in the housing 201 , leaving a gap between the scraper 211 and the electromagnetic plate 204 . The scraper 211 opens or cancels the opening of the channel between the straight plate portion 206 and the side wall of the electromagnetic plate 204 after moving.

[0061] In this embodiment, in order to solve the problem of over-selection and omission in rare earth magnetic separation in the prior art, the inventor proposed a rare earth purification device, which first disperses, mixes and dissolves, and evaporates and filters through a sedimentation and filtration device, and then transports it to the magnetic separation and filtration module 2 for magnetic separation. The two filtrations can effectively remove impurities contained in the rare earth raw materials, so that the rare earth concentrate screened out has higher accuracy and is convenient for subsequent processing.

[0062] Specifically, the precipitation and filtration device is mainly composed of a stirring tank 101 and a heating tank 105. The rare earth raw material enters the stirring tank 101 through the first feed port 102, and the precipitate enters the stirring tank 101 through the first liquid inlet 103. After the impurities in the rare earth raw material are fully dissolved in the precipitate, the water pump is turned on to pump the mixed liquid in the stirring tank 101 into the heating tank 105. The heating tank 105 heats the mixed liquid, so that some impurities in the mixed liquid evaporate and are discharged from the first evaporation port 106. What remains is the rare earth coarse material, which can be discharged into the magnetic separation and filtration module 2 after being dried. The main body of the magnetic separation and filtration module 2 can be regarded as a shell 201. The shell 201 and the heating tank 105 can be directly connected by a pipeline, and a feed hopper 203 can also be added to better receive the rare earth coarse material. After the rare earth coarse material enters the shell 201 from the third feed port 202, it will fall onto the electromagnetic plate 204. The electromagnetic plate 204 is a rectangular plate that can generate magnetic force when powered. The electromagnetic plate 204 is swingably set on the inner wall of the shell 201. The side wall of the electromagnetic plate 204 can be fitted with the inner wall of the shell 201 through wear-resistant material without leaving a gap, or a baffle can be installed to form a box shape with an open top, so that the rare earth coarse material does not fall out after falling onto the electromagnetic plate 204. The swing shaft can be installed in the inner wall of the shell 201. Taking the fitting of the two side walls of the electromagnetic plate 204 with the inner wall of the shell 201 as an example, a limit plate 205 is installed on each of the other two opposite walls of the electromagnetic plate 204. The limit plate 205 is composed of a straight plate, a curved plate and a connecting rod. The straight plate is the straight plate portion 206, the curved plate is the arc plate portion 207, and the connecting rod is the side plate portion 208. The side wall of the electromagnetic plate 204 is provided with an inward groove 209 for the side plate portion 208 to be installed in the groove 209. The side plate portion 208 is designed to be rotatable. The straight plate portion 206 is made of magnetic separation material, so the electromagnetic plate 204 can generate magnetic force after being energized to move the straight plate 206. The plate portion 206 is attracted and abuts against the end line position of the electromagnetic plate 204, so that the limit plate 205 blocks the opening on this side. Under the action of the two inner walls of the shell 201 and the two limit plates 205, the four sides of the electromagnetic plate 204 can be sealed, and an opening is left at the upper end for the rare earth coarse material to fall into. In addition, the inventor also installed a scraper 211 that can be moved laterally in the shell 201. The scraper 211 is used to scrape the rare earth coarse material that falls on the electromagnetic plate 204.

[0063] The operation process of the purification device is that the rare earth raw material is mixed with the precipitation liquid through the stirring tank 101, and then discharged into the heating tank 105 for heating and evaporation of impurities, leaving the rare earth coarse material, which is directly discharged into the shell 201 and falls on the electromagnetic plate 204, and then the scraper 211 reciprocates to spread the rare earth coarse material more evenly on the electromagnetic plate 204. The magnetic force of the electromagnetic plate 204 will absorb the magnetically selected rare earth particles in the rare earth coarse material, and then the scraper 211 will move to the vicinity of one of the limit plates 205, push the limit plate 205 open, and make it separate from the electromagnetic plate The end line of 204, at this time, a gap will be generated between the limit plate 205 and the electromagnetic plate 204, and the electromagnetic plate 204 will swing and tilt in this direction, and the impurities that are not adsorbed on the electromagnet will roll down and fall along the straight plate part 206 and the arc plate part 207, and then be collected. Then the electromagnetic plate 204 swings and tilts in the opposite direction. After power is cut off, the remaining magnetic rare earth particles will fall downward from the other direction. It only needs to place a storage box under each of the two arc plate parts 207 to collect the impurities and magnetic rare earth particles, i.e., rare earth concentrate, respectively, to complete the purification of rare earth raw materials. In the process of collecting magnetically separated rare earth particles, there is no need to use the scraper 211 to push open the other limit plate 205. After the electromagnetic plate 204 is powered off, it no longer generates magnetic force. The limit plate 205 will naturally separate from the end line position of the electromagnetic plate 204 due to its own weight, forming a gap between the electromagnetic plate 204 for the magnetic rare earth particles to fall, and the limit plate 205 can also guide impurities or magnetic rare earth particles, so that they fall accurately into their respective storage boxes to avoid leakage.

[0064] In addition, when the purification device is actually used, it is not necessary to go through sedimentation filtration and then magnetic separation filtration. The two modules can be used in combination or separately. As a further technical solution, below the electromagnetic plate 204,

[0065] The rotating wheel 213 is rotatably disposed in the driving chamber 212. The rotating axis of the rotating wheel 213 is perpendicular to the rotating axis of the electromagnetic plate 204. The rotating wheel 213 has a spiral groove 214. The spiral groove 214 has a plurality of protrusions 215.

[0066] The guide column 216 is disposed in the driving chamber 212 and is located above the rotating wheel 213. The guide column 216 is parallel to the rotation axis of the rotating wheel 213.

[0067] The electric push rod 217 is arranged on the guide column 216 through the guide sleeve 218. The guide sleeve 218 has a convex portion 219. The convex portion 219 abuts against the protrusion 215. The output end of the electric push rod 217 abuts against the bottom of the electromagnetic plate 204.

[0068] Furthermore, the magnetic separation and filtration module 2 also includes:

[0069] The clamping column 220 is arranged at the output end of the electric push rod 217. The bottom of the electromagnetic plate 204 has a slide groove 221. The slide groove 221 has a stop edge 222. The clamping column 220 abuts against the stop edge 222.

[0070] The push rod 223 is hemispherical and is disposed at the output end of the electric push rod 217 . The push rod 223 abuts against the slide groove 221 .

[0071] In this embodiment, the inventors designed a driving chamber 212 below the electromagnetic plate 204, which is an inner cavity separated by a partition, to realize the swing of the electromagnetic plate 204. When the driving wheel 213 rotates, the spiral groove 214 will push the guide sleeve 218 to move along the guide column 216. Due to the cooperation between the convex part 219 and the protrusion 215, the convex part 219 will rise and fall, and be in a shaking state. A shaking gap can be reserved between the guide sleeve 218 and the guide column 216, so that the electric push rod 217 can be slightly up and down. When the electric push rod 217 moves with the guide sleeve 218, its output end will also rise and fall. A push rod 223 and a clamping column 220 are installed on the output end. The push rod 223 is hemispherically abutted against the slide groove 221 at the bottom of the electromagnetic plate 204. The clamping column 220 is a side wing, which is clamped on the retaining edge 222 of the slide groove 221. The thickness of the clamping column 220 is less than the depth of the slide groove 221. The electric push rod 217 relies on the push rod 223 to lift the electromagnetic plate 204 and relies on the clamping column 220 to pull down the electromagnetic plate 204. When in use, the electromagnetic plate 20 4 is horizontal in its initial state, and then it will tilt to the left and then to the right. The electric push rod 217 is initially located at the right end of the slide slot 221, and the electromagnetic plate 204 is limited by the push rod 223 and the clamping column 220 to keep it horizontal. After the rotating wheel 213 rotates, the electric push rod 217 moves to the left, and at the same time, its output end rises, lifts the right half of the electromagnetic plate 204, and its left half falls accordingly to achieve a left tilt. When the electric push rod 217 moves to the middle position of the right half of the electromagnetic plate 204, the output end begins to fall, and the electromagnetic plate 204 begins to return to a horizontal state. When the electric push rod 217 reaches the middle position of the electromagnetic plate 204, the output end is at the same height as the initial height, making the electromagnetic plate 204 horizontal. Subsequently, the electric push rod 217 continues to move to the left, and the output end repeats the process of rising and falling. The electromagnetic plate 204 correspondingly deviates to the right and then returns to a horizontal position, and so on and so forth to achieve continuous magnetic separation.

[0072] Furthermore, the magnetic separation and filtration module 2 also includes:

[0073] The rare earth collecting chamber 224 is disposed in the housing 201 and is located on one side of the driving chamber 212. The opening of the rare earth collecting chamber 224 is located below one of the arc-shaped plate portions 207.

[0074] The impurity collecting chamber 225 is disposed in the housing 201 and is located at the other side of the driving chamber 212 . The opening of the impurity collecting chamber 225 is located below the other arc-shaped plate portion 207 .

[0075] In this embodiment, the inventors have designed a rare earth collecting chamber 224 and an impurity collecting chamber 225 to collect rare earth concentrate and impurities respectively. In addition, a magnetic cylinder can be installed in the impurity collecting chamber 225 for leak detection.

[0076] Furthermore, the magnetic separation and filtration module 2 also includes:

[0077] The valve 210 is rotatably arranged in the feed hopper 203. There are two third feed ports 202 and two magnetic separation and filtration modules 2 in the shell 201. The feed hopper 203 is connected to the two third feed ports 202 through two pipelines respectively. The valve 210 is used for opening and closing the two pipelines.

[0078] In this embodiment, the inventors have taken into account that one electromagnetic plate 204 cannot continuously magnetically separate coarse materials, so they have designed two sets of magnetic separation and filtration modules 2, and added an intermittent swinging valve 210 in the feed hopper 203, which swings between the two pipelines to control the opening and closing of the two pipelines, thereby achieving the connection between the two sets of magnetic separation and filtration modules 2 and allowing magnetic separation to be carried out continuously.

[0079] Further, the sedimentation and filtration module 1 also includes:

[0080] The spiral stirring wing 109 is rotatably disposed at the first feed inlet 102.

[0081] The mixing and stirring rod 110 is rotatably disposed in the stirring tank 101 and is located below the spiral stirring wings 109.

[0082] The partition 111 is arranged in the housing 201 and is located below the mixing and stirring rod 110. A switch valve is installed on the partition 111.

[0083] The filter screen 112 is disposed in the housing 201 and below the partition 111 .

[0084] In this embodiment, the inventor uses spiral stirring wings 109 to break up the rare earth raw materials in the stirring tank 101, and uses a mixing stirring rod 110 to fully mix the rare earth raw materials and the precipitate. The partition 111 is used to form a mixing and stirring space with the inner wall of the stirring tank 101. After sufficient mixing, the switch valve is opened to discharge the mixed liquid. The filter 112 is used to initially filter out large particles of impurities. The rare earth particles will pass through the filter 112 and enter the heating tank 105 along with the mixed liquid.

[0085] Further, the sedimentation and filtration module 1 also includes:

[0086] The stirring scraper 113 is rotatably disposed in the heating tank 105, and the stirring scraper 113 is in contact with the inner wall of the heating tank 105. A switch valve is installed at the second discharge port 108.

[0087] The exhaust fan 114 is rotatably disposed at the first evaporation outlet 106 .

[0088] In this embodiment, the inventors set a stirring scraper 113 in the heating tank 105 to accelerate evaporation and scrape off the materials adhering to the side wall, while the exhaust fan 114 is used to exhaust the steam.

[0089] A rare earth purification method, characterized in that it comprises the following steps:

[0090] S1, start the spiral stirring wings 109 and the mixing stirring rod 110, feed the rare earth raw material into the first feed inlet 102, pour the precipitate into the first liquid inlet 103, and obtain a mixed solution;

[0091] S2, open the switch valve on the partition 111, pump the mixed liquid into the heating tank 105 through the water pump, start the stirring scraper 113 and the exhaust fan 114, and obtain the preliminarily purified rare earth crude material;

[0092] S3, opening the switch valve at the second discharge port 108 and the valve 210 in the feed hopper 203, so that the rare earth coarse material falls onto the two electromagnetic plates 204 respectively, and starting the two electromagnetic plates 204 and the two scrapers 211, so that the rare earth coarse material is evenly spread on the electromagnetic plates 204;

[0093] S4, start the rotating wheel 213 and the electric push rod 217, the scraper 211 pushes open the right baffle, the electromagnetic plate 204 tilts to the right so that the unabsorbed impurities fall into the impurity collecting chamber 225, close the electromagnetic plate 204, the scraper 211 pushes open the left baffle, the electromagnetic plate 204 tilts to the left so that the adsorbed rare earth material falls into the rare earth collecting chamber 224, and obtains rare earth concentrate.

[0094] In this embodiment, the operation process after the rare earth coarse material enters the feed hopper 203 is that under the action of the valve 210, it enters one of the magnetic separation and filtration modules 2, and the rare earth coarse material falls onto the electromagnetic plate 204 through the third feed port 202. The electromagnetic plate 204 is horizontal and energized. The scraper 211 is located at the left end of the electromagnetic plate 204 and does not block the falling of the coarse material. After a certain amount of coarse material falls, the valve 210 will close this pipeline and open another pipeline. Then the scraper 211 moves from the left end to the right end and then back to the left end to spread the coarse material evenly. Then the wheel 213 is started, the electric push rod 217 is started, the scraper 211 pushes open the limit plate 205 at the left end, and the electric push rod 217 moves from the right end of the electromagnetic plate 204 to the position of the quartering point. In this process, the electromagnetic plate 204 tilts from horizontal to left. When the magnetic plate 204 is tilted to the maximum extent, all impurities that are not adsorbed fall from the gap between the left limit plate 205 and the electromagnetic plate 204 and fall into the impurity collection chamber 225. Then the electric push rod 217 moves from the quarter point to the middle position, and the scraper 211 also moves to the right end of the electromagnetic plate 204. The electromagnetic plate 204 is powered off, and the electric push rod 217 continues to move left to the next quarter point. The adsorbed magnetic rare earth particles and the electromagnetic plate 204 at the right end are no longer affected by the magnetic force. The electromagnetic plate 204 at the right end can create a gap with the electromagnetic plate 204 by its own weight, and the rare earth concentrate will fall into the concentrate collection chamber under the guidance of the limit plate 205, completing the magnetic separation. The electric push rod 217 then moves to the leftmost end and then back to the rightmost end, returning to the initial state. The valve 210 also opens this pipeline at the same time for the next magnetic separation.

[0095] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A rare earth purification device, characterized in that: The invention comprises a sedimentation filtration module (1) and a magnetic separation filtration module (2) which are connected in sequence, wherein the sedimentation filtration module (1) comprises a stirring tank (101) and a heating tank (105) which are connected to each other, and the magnetic separation filtration module (2) comprises: Housing (201), A feed hopper (203) is arranged on the shell (201), and the heating tank (105) is connected to the shell (201) via the feed hopper (203). The electromagnetic plate (204) is swingably disposed in the housing (201), wherein two opposite side walls of the electromagnetic plate (204) are both bonded to the inner wall of the housing (201) through wear-resistant materials or are both equipped with baffles. The limiting plate (205) comprises two other opposite side walls of the electromagnetic plate (204) each having a groove (209). The limiting plate (205) comprises a side plate portion (208), a straight plate portion (206) and an arc-shaped plate portion (207) which are connected in sequence. The side plate portions (208) are provided with two portions which are rotatably arranged in the two grooves (209) respectively. The straight plate portion (206) is swung to abut against or disengage from the side wall of the electromagnetic plate (204). A scraper (211) is movably arranged in the housing (201), with a gap between the scraper and the electromagnetic plate (204), and the scraper (211) opens or cancels the opening of a channel between the straight plate portion (206) and the side wall of the electromagnetic plate (204) after movement; The stirring tank (101) has a first feed port (102), a first liquid feed port (103) and a first discharge port (104); the heating tank (105) has a first evaporation port (106), a second feed port (107) and a second discharge port (108); the first discharge port (104) and the second feed port (107) are connected via a pipeline; the shell (201) has a third feed port (202); the second discharge port (108) is connected to the third feed port (202) via the feed hopper (203).

2. A rare earth purification device according to claim 1, characterized in that: The magnetic separation and filtration module (2) further comprises: A drive chamber (212) is disposed in the housing (201) and below the electromagnetic plate (204). A rotating wheel (213) is rotatably disposed in the driving chamber (212), the rotating axis of the rotating wheel (213) being perpendicular to the rotating axis of the electromagnetic plate (204), the rotating wheel (213) having a spiral groove (214), and the spiral groove (214) having a plurality of protrusions (215), A guide column (216) is arranged in the driving chamber (212) and is located above the rotating wheel (213). The guide of the guide column (216) is parallel to the rotation axis of the rotating wheel (213). An electric push rod (217) is slidably arranged on the guide column (216) via a guide sleeve (218); the guide sleeve (218) has a convex portion (219); the convex portion (219) abuts against the protrusion (215); and the output end of the electric push rod (217) abuts against the bottom of the electromagnetic plate (204).

3. A rare earth purification device according to claim 2, characterized in that: The magnetic separation and filtration module (2) further comprises: The clamping column (220) is arranged at the output end of the electric push rod (217); the bottom of the electromagnetic plate (204) has a slide groove (221); the slide groove (221) has a stop edge (222); the clamping column (220) abuts against the stop edge (222); The push rod (223) is hemispherical and is arranged at the output end of the electric push rod (217). The push rod (223) abuts against the slide groove (221).

4. A rare earth purification device according to claim 2, characterized in that: The magnetic separation and filtration module (2) further comprises: A rare earth collection chamber (224) is arranged in the housing (201) and is located on one side of the drive chamber (212); an opening of the rare earth collection chamber (224) is located below one of the arc-shaped plate portions (207). An impurity collection chamber (225) is arranged in the housing (201) and is located on the other side of the drive chamber (212); an opening of the impurity collection chamber (225) is located below another of the arc-shaped plate portions (207).

5. A rare earth purification device according to claim 1, characterized in that: The magnetic separation and filtration module (2) further comprises: The valve (210) is rotatably arranged in the feed hopper (203); the housing (201) has two third feed ports (202) and two magnetic separation and filtration modules (2); the feed hopper (203) is connected to the two third feed ports (202) through two pipelines, respectively; and the valve (210) is used to open and close the two pipelines.

6. A rare earth purification device according to claim 1, characterized in that: The sedimentation filtration module (1) further comprises: The spiral stirring wing (109) is rotatably disposed at the first feed inlet (102), A mixing and stirring rod (110) is rotatably disposed in the stirring tank (101) and is located below the spiral stirring wings (109). A partition (111) is arranged in the housing (201) and is located below the mixing and stirring rod (110). A switch valve is installed on the partition (111). The filter screen (112) is arranged in the housing (201) and is located below the partition plate (111).

7. A rare earth purification device according to claim 1, characterized in that: The sedimentation filtration module (1) further comprises: A stirring scraper (113) is rotatably disposed in the heating tank (105), the stirring scraper (113) is in contact with the inner wall of the heating tank (105), and a switch valve is installed at the second discharge port (108). An exhaust fan (114) is rotatably disposed at the first evaporation port (106).

8. A rare earth purification method, using the rare earth purification device according to claim 1, characterized in that: The following steps are involved: S1, start the spiral stirring wings (109) and the mixing stirring rod (110), feed the rare earth raw material into the first feed inlet (102), and pour the precipitate into the first liquid inlet (103) to obtain a mixed liquid; S2, opening the switch valve on the partition (111), pumping the mixed liquid into the heating tank (105) through a water pump, starting the stirring scraper (113) and the exhaust fan (114), and obtaining a preliminarily purified rare earth crude material; S3, starting the two electromagnetic plates (204), opening the switch valve at the second discharge port (108) and the valve (210) in the feed hopper (203), allowing the rare earth coarse material to continuously fall back and forth on the two electromagnetic plates (204), and starting the two scrapers (211) to evenly spread the rare earth coarse material on the electromagnetic plates (204); S4, starting the rotating wheel (213) and the electric push rod (217), the scraper (211) pushes open the baffle on one side, the electromagnetic plate (204) tilts so that the impurities that are not adsorbed fall into the impurity collection chamber (225), the electromagnetic plate (204) is closed, the scraper (211) pushes open the baffle on the other side, the electromagnetic plate (204) tilts so that the adsorbed rare earth material falls into the rare earth collection chamber (224), and rare earth concentrate is obtained.

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