A precipitating apparatus for rare earth oxide treatment

Abstract

The present application relates to rare earth oxide processing equipment field, especially to a kind of rare earth oxide processing precipitation equipment, including reaction tank, liquid inlet pipe and stirring rod etc.;Reaction tank body is conical arrangement;Reaction tank upper side is provided with feed inlet;Reaction tank lower side is provided with dismounting portion;Reaction tank is connected with liquid inlet pipe, and the communication part of liquid inlet pipe and reaction tank is located in the tangential position of reaction tank side face;Liquid inlet pipe is provided with first connecting pipe for adding acidic leaching solution;Stirring rod for improving rare earth ore particle dissolution efficiency is rotatably connected in reaction tank.The present application realizes the softening layer on the surface of rare earth ore particle to be rubbed and scraped by rotating grinding ring, makes the inner layer of rare earth ore particle contact with acidic leaching solution, so as to improve the dissolution effect of rare earth ore particle;Meanwhile, insoluble impurity particles in reaction tank are blocked by grinding ring, so as to prevent impurity particles from being taken into precipitation tank, affect the precipitation effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of rare earth oxide processing equipment, and particularly relates to a precipitation equipment for rare earth oxide processing. BACKGROUND

[0002] In the precipitation process of rare earth oxides, first, the rare earth ore needs to be crushed, then the pretreated rare earth ore particles are mixed with acid leaching liquid, and the mixture is reacted under certain temperature and pressure conditions to convert into a soluble solution containing rare earth ions, so as to realize the transfer of rare earth elements from the ore to the acid leaching liquid. However, in the process of stirring and mixing the rare earth ore particles and the acid leaching liquid, since the rare earth elements in some rare earth ores may exist in the form of complex silicates or phosphates, it is more difficult for the rare earth elements to be dissolved by the acid leaching liquid compared to ores in which the rare earth elements exist in the form of simple minerals. In addition, since the rare earth ore is difficult to be absolutely uniform in the crushing process, there are still some rare earth ores with large particles, and the stirring time needs to be prolonged to make the rare earth elements fully dissolved. However, merely prolonging the stirring time will lead to an increase in the energy consumption of the equipment, and the efficiency is difficult to guarantee, thereby affecting the product yield. SUMMARY

[0003] In order to overcome the shortcomings that the rare earth ore is difficult to be absolutely uniform in the crushing process, and there are still some rare earth ores with large particles, and the stirring time needs to be prolonged to make the rare earth elements fully dissolved, but merely prolonging the stirring time will lead to an increase in the energy consumption of the equipment, and the efficiency is difficult to guarantee, thereby affecting the product yield, the present application provides a precipitation equipment for rare earth oxide processing.

[0004] The technical scheme of the present application is: a kind of precipitating equipment for rare earth oxide treatment, including reaction tank, liquid inlet pipe and stirring rod;Reaction tank body is conical arrangement;Reaction tank upper side is provided with feed inlet;Reaction tank lower side is provided with dismounting portion;Reaction tank is connected with liquid inlet pipe, and the communication part of liquid inlet pipe and reaction tank is located in the tangential position of reaction tank side;Liquid inlet pipe is provided with first connecting pipe for adding acidic leaching solution;Stirring rod for improving the dissolution efficiency of rare earth ore particles is rotatably connected in reaction tank;It also includes grinding ring, liquid outlet pipe, sedimentation tank and anti-blocking assembly;First connecting portion is provided on stirring rod, and a plurality of convex parts are provided on first connecting portion;Grinding ring for breaking rare earth ore particles is slidably connected on stirring rod, and there is a gap between grinding ring and reaction tank inner wall;Flap is provided on grinding ring;Second connecting portion is provided on grinding ring, and second connecting portion is slidably connected with the first connecting portion of stirring rod;Reaction tank lower side is communicated with liquid outlet pipe;Second connecting pipe is provided on liquid outlet pipe, second connecting pipe is connected with the liquid inlet end of external pump one, and liquid inlet pipe is connected with the liquid outlet end of external pump one;Liquid outlet pipe is communicated with sedimentation tank for rare earth salt solution precipitation, and pump two is arranged in sedimentation tank;Electromagnetic valve is arranged at the communication part of liquid outlet pipe and sedimentation tank;Anti-blocking assembly for preventing impurity particles from affecting solution circulation is installed in reaction tank.

[0005] More preferably, the flap of the grinding ring is in the shape of a circular truncated cone.

[0006] More preferably, the anti-blocking assembly includes a fixed seat, a driving member, and an extrusion block;The reaction tank is made of transparent material;The fixed seat is fixedly connected to the lower side of the reaction tank;The driving member is fixedly connected to the fixed seat;The output end of the driving member penetrates the liquid outlet pipe and the dismounting portion;The extrusion block is fixedly connected to the output end of the driving member and slidably connected to the liquid outlet pipe.

[0007] More preferably, it also includes an extrusion ring;The extrusion ring is fixedly connected to the inner wall of the reaction tank for extruding rare earth ore particles;The extrusion ring is located above the grinding ring, and the side of the extrusion ring close to the grinding ring is concave.

[0008] More preferably, it also includes a filter screen;The filter screen is fixedly connected to the bottom of the reaction tank for blocking impurity particles, and the filter screen covers the liquid outlet pipe.

[0009] More preferably, it also includes a filter membrane;The filter membrane is sleeved on the filter screen for filtering impurities.

[0010] More preferably, it also includes a sealing ring;The sealing ring is fixedly connected to the connection part of the extrusion block and the liquid outlet pipe to prevent solution leakage, and the sealing ring is slidably connected to the extrusion block.

[0011] More preferably, the defoaming assembly is further included; the defoaming assembly includes fixing rings, a liquid storage pipe and spray pipes; a plurality of fixing rings are fixed on the reaction tank; the liquid storage pipe for storing the defoaming agent is fixed on the fixing rings, and the liquid storage pipe is connected with an external pump; a plurality of spray pipes are communicated with the liquid storage pipe, and each spray pipe penetrates the reaction tank; a plurality of liquid outlets are arranged on each spray pipe.

[0012] More preferably, the plurality of spray pipes are arranged in a ring array.

[0013] More preferably, the filter screen is made of high-temperature-resistant and corrosion-resistant materials.

[0014] The beneficial effect is that the present application realizes the circulation of the solution, avoids the local overheating of the reaction tank body, provides a more stable leaching environment, and increases the relative movement between the acid leaching solution and the rare earth ore particles, thereby improving the leaching efficiency of the rare earth ore particles and the acid leaching solution.

[0015] The softening layer on the surface of the rare earth ore particles is scraped off by the rotating grinding ring, so that the inner layer of the rare earth ore particles is in contact with the acid leaching solution, thereby improving the dissolution effect of the rare earth ore particles; at the same time, the insoluble impurity particles in the reaction tank are blocked by the grinding ring, thereby preventing the impurity particles from being brought into the sedimentation tank together, affecting the sedimentation effect.

[0016] The interval between the grinding ring and the inner wall of the reaction tank is increased by the upward extrusion of the extrusion block, so that smaller impurity particles and smaller rare earth ore particles pass through the interval between the grinding ring and the inner wall of the reaction tank and fall to the bottom of the reaction tank, thereby preventing the impurity particles from blocking the interval and affecting the circulation effect of the solution.

[0017] The larger rare earth ore particles located between the grinding ring and the extrusion ring are extruded by the upward movement of the extrusion ring, which gradually breaks, so that the acid leaching solution reacts with the inner layer of the rare earth ore particles through the cracks on the rare earth ore particles, thereby further improving the dissolution effect of the rare earth ore particles. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a three-dimensional structure schematic diagram of the rare earth oxide treatment sedimentation equipment of the present application;

[0019] Figure 2 It is a cross-sectional view of the reaction tank of the present application;

[0020] Figure 3 It is a cross-sectional view of the grinding ring of the present application;

[0021] Figure 4 It is a three-dimensional structure schematic diagram of the anti-blocking assembly of the present application;

[0022] Figure 5It is a schematic diagram of the three-dimensional structure of the filter screen and filter membrane combination of the present application.

[0023] Figure 6 It is a schematic diagram of the three-dimensional structure of the sealing ring of the present application.

[0024] Figure 7 It is a schematic diagram of the three-dimensional structure of the fixed ring and liquid storage pipe combination of the present application.

[0025] Figure 8 It is a schematic diagram of the three-dimensional structure of the spray pipe of the present application.

[0026] In the figure, 1 is a reaction tank, 1001 is a disassembly part, 2 is a liquid inlet pipe, 2001 is a first connecting pipe, 3 is a stirring rod, 3001 is a first connecting part, 4 is a grinding ring, 4001 is a baffle, 4002 is a second connecting part, 5 is a liquid outlet pipe, 5001 is a second connecting pipe, 6 is a sedimentation tank, 201 is a fixing seat, 202 is a driving part, 203 is a pressing block, 204 is a pressing ring, 205 is a filter screen, 206 is a filter membrane, 207 is a sealing ring, 301 is a fixed ring, 302 is a liquid storage pipe, 303 is a spray pipe, and 30301 is a liquid outlet hole. DETAILED DESCRIPTION

[0027] The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0028] Example 1

[0029] A kind of rare earth oxide treatment is precipitated equipment, as shown in Figures 1-3 It includes reaction tank 1, liquid inlet pipe 2 and stirring rod 3; the tank body of reaction tank 1 is arranged in conical shape; the upper side of reaction tank 1 is provided with feed inlet; the lower side of reaction tank 1 is provided with disassembly part 1001; reaction tank 1 is communicated with liquid inlet pipe 2 on the upper side, and the communication part of liquid inlet pipe 2 and reaction tank 1 is located at the tangential position of the side of reaction tank 1; first connecting pipe 2001 is arranged on liquid inlet pipe 2; motor is arranged on the upper side of reaction tank 1; stirring rod 3 is rotatably connected in reaction tank 1, and the output shaft of motor is fixedly connected with stirring rod 3, which is rotated by motor to drive stirring rod 3;

[0030] Also include the grinding ring 4, liquid outlet pipe 5, sedimentation tank 6 and anti-blocking assembly;Stirring rod 3 is provided with a first connecting part 3001, and the first connecting part 3001 is provided with a plurality of convex parts;The stirring rod 3 is slidably connected with the grinding ring 4, and there is a gap between the grinding ring 4 and the inner wall of the reaction tank 1;The grinding ring 4 is provided with a baffle 4001;The grinding ring 4 is provided with a second connecting part 4002, and the second connecting part 4002 is slidably connected with the first connecting part 3001 of the stirring rod 3;The reaction tank 1 is connected with the liquid outlet pipe 5;The liquid outlet pipe 5 is provided with a second connecting pipe 5001, and the second connecting pipe 5001 is connected with the inlet end of the external pump one, and the inlet pipe 2 is connected with the outlet end of the external pump one;The liquid outlet pipe 5 is connected with the sedimentation tank 6, and the sedimentation tank 6 is provided with a pump two;The liquid outlet pipe 5 and the sedimentation tank 6 are provided with a solenoid valve;The reaction tank 1 is provided with an anti-blocking assembly.

[0031] The baffle 4001 of the grinding ring 4 is provided in the shape of a circular truncated cone.

[0032] The working principle of the embodiment is as follows:

[0033] First, add an appropriate amount of acid leaching liquid to the reaction tank 1 through the first connecting pipe 2001 of the inlet pipe 2, at this time the acid leaching liquid in the reaction tank 1 covers the stirring blade of the stirring rod 3, then add an appropriate amount of broken rare earth ore to the reaction tank 1 through the feed inlet on the upper side of the reaction tank 1, at the same time, start the motor to drive the stirring rod 3 to start stirring, from the top to the bottom as the reference, the stirring rod 3 rotates counterclockwise, so as to ensure that the newly added rare earth ore particles are in contact with the acid leaching liquid quickly, and the dissolution speed of the rare earth ore particles is accelerated.

[0034] The second step, in the process of mixing and stirring the rare earth ore particles with the acidic leaching solution to generate chemical reaction, usually accompanied by the generation of heat release phenomenon, and the heat release will cause the local temperature rise in the reaction tank 1, if the heat cannot be removed in time and effectively, not only will cause damage to the equipment, long-term high temperature will lead to the rare earth ions in the solution and other substances to unnecessary side reactions, thereby reducing the concentration of rare earth ions in the solution, in order to solve the above situation, when the reaction is carried out for a period of time, most of the rare earth ore particles in the reaction tank 1 have been dissolved in the solution, there are a small part of larger rare earth ore particles and other insoluble impurity particles, at this time, the pump machine one of the external device is started, the solution formed in the reaction tank 1 is extracted out through the second connecting pipe 5001 of the liquid outlet pipe 5, since the second connecting pipe 5001 is connected with the liquid inlet end of the external pump machine one, and the liquid inlet pipe 2 is connected with the liquid outlet end of the external pump machine one, therefore the extracted solution will return to the inside of the reaction tank 1 through the liquid inlet pipe 2, thereby forming circulation from the outside of the reaction tank 1, facilitating heat exchange with the outside world, and then returning to the reaction tank 1, avoiding the local overheating of the reaction tank 1, providing more stable leaching environment, while increasing the relative motion between the acidic leaching solution and the rare earth ore particles, improving the leaching efficiency of the rare earth ore particles and the acidic leaching solution.

[0035] Since most of the rare earth ore particles in the reaction tank 1 have been dissolved in the solution at this time, there are a small part of larger rare earth ore particles and other insoluble impurity particles, and these larger rare earth ore particles cannot be quickly dissolved by relying on the stirring of the stirring rod 3 only, by setting the reaction tank 1 tank body into a conical shape, and the connecting part of the liquid inlet pipe 2 and the reaction tank 1 is located at the tangential position of the side of the reaction tank 1, therefore the solution will make spiral motion along the inner wall of the reaction tank 1 after being sprayed from the liquid inlet pipe 2, taking the lower part as the reference, the direction of the spiral motion of the solution is consistent with the direction of the rotation of the stirring rod 3, so that most of the solid particles in the reaction tank 1 will settle along the inner wall under the action of centrifugal force, promoting the separation between the solid particles and the solution, thereby facilitating the separate treatment of the larger rare earth ore particles and impurity particles.

[0036] The third step, in the process of the solid particles in the reaction tank 1 settling downward along the inner wall, a small part of the solid particles will directly settle downward from the middle of the reaction tank 1, at this time, the baffle 4001 of the grinding ring 4 blocks the solid particles, preventing part of the solid particles from settling downward from the middle of the reaction tank 1, at the same time, the baffle 4001 is set in the shape of a circular truncated cone, guiding the settled solid particles to the inner wall of the reaction tank 1, preventing the solid particles from accumulating on the baffle 4001, thereby avoiding affecting the leaching effect.

[0037] Since the second connecting part 4002 of the grinding ring 4 is in sliding connection with the first connecting part 3001 of the stirring rod 3, and a plurality of protrusions are arranged on the first connecting part 3001, the stirring rod 3 will drive the grinding ring 4 to rotate, and since there is a gap between the grinding ring 4 and the inner wall of the reaction tank 1, the solution will continue to flow downward through the gap between the grinding ring 4 and the inner wall of the reaction tank 1 for circulation, and the solid particles in the reaction tank 1 are blocked by the grinding ring 4.

[0038] It should be noted that the solid particles in contact with the grinding ring 4 and accumulated on the upper side of the grinding ring 4 at this time are the larger rare earth ore particles and insoluble impurity particles that have settled, and the surface layer of the rare earth ore particles will gradually soften during the dissolution process. Therefore, when the larger rare earth ore particles sink downward and come into contact with the rotating grinding ring 4, the rotating grinding ring 4 will rub and scrape off the softened layer on the surface of the rare earth ore particles, and the scraped softened layer will quickly dissolve in the solution, and the inner layer of the rare earth ore particles will be exposed to the solution and gradually soften and dissolve in contact with the acidic leaching solution, thereby improving the dissolution effect of the rare earth ore particles. As the rare earth ore particles gradually dissolve, the size of the rare earth ore particles gradually decreases and continues to sink downward into the gap between the grinding ring 4 and the reaction tank 1, thereby always being in contact with the surface of the grinding ring 4 until complete dissolution, while the insoluble impurity particles are blocked by the grinding ring 4. Through the above work, small rare earth ore particles are dissolved under the stirring action of the stirring rod 3, while larger rare earth ore particles that have not been fully dissolved are in contact with the grinding ring 4 under the action of centrifugal sedimentation, and the dissolution of the rare earth ore particles is accelerated by the rubbing and scraping action of the grinding ring 4, thereby improving the dissolution rate of the rare earth ore particles.

[0039] In the fourth step, when the rare earth ore particles in the reaction tank 1 are fully dissolved, the pump two is started and the electromagnetic valve is opened to pump the solution containing rare earth ions in the reaction tank 1 into the sedimentation tank 6. At this time, the insoluble impurity particles in the reaction tank 1 are blocked by the grinding ring 4, thereby preventing the impurity particles from being brought into the sedimentation tank 6 together, which affects the sedimentation effect. After the solution is completely pumped into the sedimentation tank 6, a precipitating agent is added to react with the rare earth ions in the solution to form a rare earth compound that is insoluble in water.

[0040] Example 2

[0041] Based on Example 1, as Figure 1 and Figures 4-8As shown, the anti-blocking assembly comprises a fixing seat 201, a driving member 202 and an extrusion block 203; the reaction tank 1 is made of transparent material; the fixing seat 201 is fixed to the lower side of the reaction tank 1; the driving member 202 is fixed to the fixing seat 201 and is an electric push rod; the output end of the driving member 202 penetrates through the liquid outlet pipe 5 and the disassembly part 1001; and the output end of the driving member 202 is fixed with the extrusion block 203 which is in sliding connection with the liquid outlet pipe 5.

[0042] Further comprising an extrusion ring 204; the extrusion ring 204 is fixed to the inner wall of the reaction tank 1; the extrusion ring 204 is located above the grinding ring 4 and is recessed on the side close to the grinding ring 4.

[0043] Further comprising a filter screen 205; the filter screen 205 is fixed to the bottom of the reaction tank 1 and covers the pipe opening of the liquid outlet pipe 5.

[0044] Further comprising a filter membrane 206; the filter membrane 206 is sleeved on the filter screen 205.

[0045] Further comprising a sealing ring 207; the sealing ring 207 is fixed to the connecting part of the extrusion block 203 and the liquid outlet pipe 5 and is in sliding connection with the extrusion block 203.

[0046] Further comprising a defoaming assembly; the defoaming assembly comprises a fixing ring 301, a liquid storage pipe 302 and a spray pipe 303; four fixing rings 301 are fixed to the reaction tank 1; the liquid storage pipe 302 is fixed to all the fixing rings 301 and is connected with an external pump; six spray pipes 303 are communicated with the liquid storage pipe 302 and penetrate through the reaction tank 1; and three liquid outlet holes 30301 are arranged on each spray pipe 303.

[0047] The six spray pipes 303 are arranged in a ring array.

[0048] The filter screen 205 is made of high-temperature-resistant and corrosion-resistant material.

[0049] The working steps of the embodiment are as follows:

[0050] In the third step of the embodiment 1: when the insoluble impurity particles are blocked by the grinding ring 4, the gap between the grinding ring 4 and the inner wall of the reaction tank 1 will be gradually blocked by the accumulation of the impurity particles, affecting the circulation effect of the solution and reducing the leaching effect.

[0051] To solve the above situation, since the tank body of the reaction tank 1 is conical, and the reaction tank 1 is made of transparent material, after the solution circulates for a period of time, the driving member 202 is controlled intermittently to extend upward and retract downward according to the number of solid particles accumulated on the grinding ring 4, and the extrusion block 203 is intermittently extruded upward to the second connecting part 4002 of the grinding ring 4, so that the second connecting part 4002 drives the grinding ring 4 to move upward with the first connecting part 3001 of the stirring rod 3, and the interval between the grinding ring 4 and the inner wall of the reaction tank 1 is increased, so that smaller impurity particles and smaller rare earth ore particles pass through the interval between the grinding ring 4 and the inner wall of the reaction tank 1 and fall to the bottom of the reaction tank 1, and the smaller rare earth ore particles will quickly dissolve in the solution, while the impurity particles will accumulate in the disassembly part 1001 of the reaction tank 1, thereby preventing the impurity particles from blocking the interval and affecting the circulation effect of the solution.

[0052] When the impurity particles fall to the bottom of the reaction tank 1, the filter screen 205 blocks the impurity particles to prevent them from entering the liquid outlet pipe 5, which causes the impurity particles to be sucked into the sedimentation tank 6, affecting the sedimentation effect. At the same time, when the rare earth ore particles are dissolved, the filter membrane 206 filters the solution to intercept the fine particles in the solution, improving the purity of the solution and the quality of subsequent precipitation; after the solution in the reaction tank 1 is pumped, the disassembly part 1001 of the reaction tank 1 is disassembled, and the impurity particles in the disassembly part 1001 are treated, and after the treatment is completed, the disassembly part 1001 is installed back in place.

[0053] When the extrusion block 203 extrudes the grinding ring 4 upward, the sealing ring 207 seals the connection between the extrusion block 203 and the liquid outlet pipe 5 to prevent solution leakage and waste. At the same time, the grinding ring 4 will gradually approach the extrusion ring 204. Since the side of the extrusion ring 204 close to the grinding ring 4 is concave, when the grinding ring 4 and the extrusion ring 204 approach each other, the larger rare earth ore particles between them will be extruded by the extrusion ring 204 and gradually broken, so that the acid leaching solution reacts with the inner layer of the rare earth ore particles through the cracks on the ore particles, further improving the dissolution effect of the rare earth ore particles.

[0054] When the rare earth ore particles and the acid leaching solution are stirred and mixed, sulfur dioxide or other gases will be generated inside the solution. These bubbles rise in the solution and form foam, so that a layer of scum is formed on the surface of the solution in the reaction tank 1, and some solids are wrapped by the bubbles, affecting the contact between the rare earth ore particles and the acid leaching solution, and the settlement effect of the solid particles. At the same time, the scum will affect the discharge of gas inside the solution, thereby reducing the leaching effect of the rare earth ore particles.

[0055] In the second step of embodiment 1: to solve the above problems, when the stirring rod 3 stirs the rare earth ore particles and the acidic leaching solution, the pump three is started to make the defoaming agent in the liquid storage pipe 302 sprayed out through the liquid outlet hole 30301 of the spray pipe 303, at this time, the solution in the reaction tank 1 flows in a spiral shape, and the floating foam is gathered in the middle of the reaction tank 1 due to the centripetal force, and the defoaming agent is uniformly sprayed in the middle of the reaction tank 1 through the annular array distributed spray pipe 303, so that the defoaming efficiency is improved.

[0056] The above only describes the embodiments of the present application and is not used to limit the present application. Any equivalent replacement within the principles of the present application should be included in the protection scope of the present application. The contents of the present application which are not described in detail belong to the prior art known by the technical personnel in the field.

Claims

1. A precipitation device for treating rare earth oxides, comprising a reaction tank (1), a liquid inlet pipe (2) and a stirring rod (3); the reaction tank (1) is tapered; a feed port is provided on the upper side of the reaction tank (1); a disassembly portion (1001) is provided on the lower side of the reaction tank (1); the reaction tank (1) is connected to the liquid inlet pipe (2), and the connecting portion between the liquid inlet pipe (2) and the reaction tank (1) is located at a tangential position on the side of the reaction tank (1); the liquid inlet pipe (2) is provided with a first connecting pipe (2001) for adding an acidic leaching solution; a stirring rod (3) for improving the dissolution efficiency of rare earth ore particles is rotatably connected in the reaction tank (1); the device is characterized in that: Also include the grinding ring (4), liquid outlet pipe (5), sedimentation tank (6) and anti-blocking assembly; The stirring rod (3) is provided with a first connecting part (3001), and a plurality of convex parts are arranged on the first connecting part (3001); The stirring rod (3) is slidably connected with the grinding ring (4) for breaking rare earth ore particles, and there is a gap between the grinding ring (4) and the inner wall of the reaction tank (1); The grinding ring (4) is provided with a baffle (4001); The grinding ring (4) is provided with a second connecting part (4002), and the second connecting part (4002) is slidably connected with the first connecting part (3001) of the stirring rod (3); The lower side of the reaction tank (1) is communicated with the liquid outlet pipe (5); The second connecting pipe (5001) is arranged on the liquid outlet pipe (5), the second connecting pipe (5001) is connected with the liquid inlet end of the external pump one, and the liquid inlet pipe (2) is connected with the liquid outlet end of the external pump one; The liquid outlet pipe (5) is communicated with the sedimentation tank (6) for the precipitation of rare earth salt solution, and the sedimentation tank (6) is provided with a pump two; The electromagnetic valve is arranged at the communication between the liquid outlet pipe (5) and the sedimentation tank (6); The reaction tank (1) is provided with an anti-blocking assembly for preventing impurity particles from affecting the solution circulation; The baffle (4001) of the grinding ring (4) is in the shape of a circular truncated cone; The anti-blocking assembly comprises a fixing seat (201), a driving member (202) and an extrusion block (203); The reaction tank (1) is made of transparent material; The lower side of the reaction tank (1) is fixedly connected with the fixing seat (201); The driving member (202) is fixedly connected to the fixing seat (201); The output end of the driving member (202) penetrates the liquid outlet pipe (5) and the dismounting part (1001); The output end of the driving member (202) is fixedly connected with the extrusion block (203), and the extrusion block (203) is slidably connected with the liquid outlet pipe (5); Also include the extrusion ring (204); The inner wall of the reaction tank (1) is fixedly connected with the extrusion ring (204) for extruding rare earth ore particles; The extrusion ring (204) is located above the grinding ring (4), and the side of the extrusion ring (204) close to the grinding ring (4) is arranged in a concave shape.

2. The precipitation device for rare earth oxide processing according to claim 1, characterized in that: Also include the filter screen (205); The bottom of the reaction tank (1) is fixedly connected with the filter screen (205) for blocking impurity particles, and the filter screen (205) covers the liquid outlet pipe (5) opening.

3. The apparatus according to claim 2, wherein: Also include the filter membrane (206); The filter membrane (206) for filtering impurities is sleeved on the filter screen (205).

4. The apparatus according to claim 1, wherein: Also include the sealing ring (207); The extrusion block (203) is fixedly connected with the sealing ring (207) at the connecting part of the extrusion block (203) and the liquid outlet pipe (5), and the sealing ring (207) is slidably connected with the output end of the driving member (202).

5. The apparatus for depositing rare earth oxides according to claim 1, wherein: Also include defoaming assembly; defoaming assembly includes fixed ring (301), liquid storage pipe (302) and spray pipe (303); reaction tank (1) is fixed with a plurality of fixed rings (301); all fixed rings (301) are jointly fixed with liquid storage pipe (302) for containing defoaming agent, and the liquid storage pipe (302) is connected with external pump three; the liquid storage pipe (302) is communicated with a plurality of spray pipes (303), and each spray pipe (303) penetrates the reaction tank (1); a plurality of liquid outlets (30301) are arranged on each spray pipe (303).

6. The apparatus according to claim 5, wherein: A plurality of spray pipes (303) are arranged in a ring array.

7. The apparatus according to claim 2, wherein: The filter screen (205) is made of high-temperature-resistant and corrosion-resistant material.

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