CN115253452B - Preparation method of high-dispersity superfine neodymium oxide - Google Patents

Abstract

The invention discloses a preparation method of high-dispersibility ultrafine neodymium oxide, which relates to the technical field of neodymium oxide processing. According to the invention, the praseodymium and neodymium enrichment can be better dissolved in nitric acid, and meanwhile, the mixed liquid formed after the dissolution of the praseodymium and neodymium enrichment can be more quickly mixed with dilution water, so that the preparation efficiency of the praseodymium and neodymium enrichment liquid is effectively improved, and the method is more suitable for industrial production.

Description

Preparation method of high-dispersity superfine neodymium oxide

Technical Field

The invention relates to the technical field of neodymium oxide processing, in particular to a preparation method of high-dispersity ultrafine neodymium oxide.

Background

The neodymium oxide is stored in a powder form and acts as an additive, and can be used as the additive in the preparation of materials such as metal, glass, ceramic, grinding and cutting wheels, etc., so that the quality of products is improved and improved, and in the process, the physical properties such as granularity, dispersibility, fluidity, etc. of the neodymium oxide powder directly influence the quality and the application of the products, so that the properties of the neodymium oxide powder greatly influence the performance of the products.

The invention patent of the patent application publication No. CN 111304469B discloses a preparation method of high-dispersity ultrafine neodymium oxide, which comprises the procedures of mixing ingredients, extracting, chemical precipitation, burning, hydrogen crushing, oxidizing and the like; according to the invention, a chemical precipitation and hydrogen crushing process is combined, neodymium fluoride is obtained through chemical precipitation, micron-sized neodymium oxide is obtained through calcination, then residual single-phase neodymium is removed through hydrogen absorption, purity is improved through calcination and oxidation again, crystal boundary breakage is generated on a microscopic level through hydrogen absorption expansion of single-crystal neodymium in a hydrogen absorption stage, crystal breakage is generated, and the fineness of the neodymium oxide is improved and the particle morphology is optimized; the production process is simple, the particle size and the dispersibility of the product are good, the particles are uniform spheres under a scanning electron microscope and nearly monodisperse, and the particles can be uniformly dispersed in the material as an additive.

When the preparation method is used for preparing the praseodymium and neodymium enriched material liquid, the praseodymium and neodymium enriched material, nitric acid and water are mixed and proportioned, and then insoluble impurities are removed through solid-liquid separation to obtain the praseodymium and neodymium enriched material liquid, however, after the actual application of the method is found by a person skilled in the art, the direct mixing of the praseodymium and neodymium enriched material, the nitric acid and the water can lead to the dilution of the nitric acid, so that the praseodymium and neodymium enriched material can be completely dissolved only in a long time, the preparation efficiency of the praseodymium and neodymium enriched material liquid is greatly affected, and the method cannot be effectively applied to industrial production.

Therefore, it is necessary to invent a preparation method of ultrafine neodymium oxide with high dispersibility to solve the above problems.

Disclosure of Invention

The invention aims to provide a preparation method of high-dispersity ultrafine neodymium oxide, which aims to solve the problems in the background technology.

In order to achieve the above purpose, the present invention provides the following technical solutions: the preparation method of the high-dispersibility ultrafine neodymium oxide is realized by using preparation equipment of the high-dispersibility ultrafine neodymium oxide, the preparation equipment of the high-dispersibility ultrafine neodymium oxide comprises a charging barrel, a partition plate is fixedly arranged in the middle of the inner side of the charging barrel, a filtering mechanism is arranged on the partition plate, a liquid discharging mechanism is arranged at the top of the outer side of the filtering mechanism, a stirring rod in the liquid discharging mechanism stirs materials on the inner side of a filter cylinder in the filtering mechanism, an insoluble impurity lifting mechanism is arranged in the filtering mechanism, a driving shaft in the filtering mechanism drives lifting lantern rings in the insoluble impurity lifting mechanism to lift, limiting mechanisms are arranged at the bottoms of two sides of the filtering mechanism, the lifting lantern rings in the insoluble impurity lifting mechanism drive outer cross plates in the limiting mechanisms to lift, guide driving mechanisms are arranged on two side walls in the charging barrel, the outer cross plates in the limiting mechanisms drive second threaded sleeves in the guide driving mechanisms to lift, and nitric acid input pipes and water input pipes are arranged on the liquid discharging mechanism.

Preferably, the filtering mechanism comprises a mounting plate, a driving motor, a driving shaft, a rotating disk and a filter cartridge;

the mounting plate is fixedly arranged at the bottom of the inner side of the charging barrel, the driving motor is fixedly arranged at the bottom of the mounting plate, the driving shaft is positioned at the top of the mounting plate and is in transmission connection with the driving motor, the rotating disc is fixedly sleeved at the top of the outer side of the driving shaft, and the filter cylinder is fixedly arranged at the top of the rotating disc.

Preferably, the liquid draining mechanism comprises two liquid draining components, wherein each liquid draining component comprises an arc-shaped sealing plate, a suspension shaft, a stirring rod, a telescopic rod, a first threaded sleeve, a first screw rod and a driven bevel gear;

the nitric acid input pipe and the water input pipe are respectively fixed to penetrate through the tops of the outer sides of the two arc-shaped sealing plates, the arc-shaped sealing plates are attached to the outer sides of the filter cylinders, the hanging shaft is fixedly arranged on the inner sides of the arc-shaped sealing plates, the stirring rod is rotatably sleeved on the outer sides of the hanging shaft through a bearing, the telescopic rod is fixedly arranged on the top of the outer sides of the arc-shaped sealing plates, the end part of the telescopic rod is fixedly connected with the inner wall of the charging barrel, the first threaded sleeve is fixedly arranged at the bottom of the outer sides of the arc-shaped sealing plates, the first threaded sleeve is in threaded connection with the inner side of the first threaded sleeve, the first threaded rod is rotatably sleeved on the inner wall of the charging barrel through the bearing, and the driven bevel gear is fixedly sleeved on the outer sides of the first threaded rod.

Preferably, the insoluble impurity lifting mechanism comprises a T-shaped shaft, a base, a filter bucket and a lifting lantern ring;

the T-shaped shaft is nested to be arranged on the inner side of the driving shaft in a sliding mode, the base is sleeved on the top end of the T-shaped shaft in a rotating mode through a bearing and is arranged on the inner side of the filter cylinder in a sliding mode, the filter bucket is fixedly arranged on the top of the base, the lifting lantern ring is sleeved on the outer side of the driving shaft, and the lifting lantern ring is connected with the driving shaft in a transmission mode through reciprocating threads on the outer side of the driving shaft.

Preferably, the limiting mechanism comprises an inner transverse plate, a sliding rod, a first spring and an outer transverse plate;

the inner transverse plate is fixedly arranged on the side face of the T-shaped shaft, two sliding rods and first springs are arranged, the sliding rods are arranged at the top of the inner transverse plate in a sliding penetrating mode, the first springs are respectively sleeved on the outer sides of the two sliding rods, the outer transverse plate is located at the bottom of the inner transverse plate and fixedly connected with the two sliding rods, and one end of each first spring is fixedly connected with the inner transverse plate and the other end of each first spring is fixedly connected with the outer transverse plate.

Preferably, the guiding driving mechanism comprises a second screw rod, a side plate, a second spring, a second threaded sleeve and a drive bevel gear;

the second screw rod runs through and sets up in division board top side, and rotates with the division board through the bearing to be connected, curb plate, second spring and second screw sleeve cup joint in proper order from top to bottom and set up in the second screw rod outside, curb plate and feed cylinder inner wall fixed connection, second spring one end and curb plate fixed connection and other end and second screw sleeve fixed connection, second screw sleeve and second screw rod threaded connection, initiative bevel gear is fixed to be set up in second screw rod top and with driven bevel gear meshing.

Preferably, the preparation method of the high-dispersity ultrafine neodymium oxide specifically comprises the following steps:

s1, adding praseodymium and neodymium concentrates into the inner side of a filter cartridge through an opening at the top of the filter cartridge, inputting nitric acid into the inner side of the filter cartridge through a nitric acid input pipe, accumulating the praseodymium and neodymium concentrates at the top of a filter cartridge, dissolving the praseodymium and neodymium concentrates by the nitric acid, then starting a driving motor, driving a rotating disc and the filter cartridge to rotate by the driving motor through a driving shaft, driving a base and the filter cartridge to rotate by the driving motor through a T-shaped shaft, synchronously rotating the praseodymium and neodymium concentrates and the nitric acid at the moment, and stirring the praseodymium and neodymium concentrates and the nitric acid by two stirring rods which are stationary in the continuous rotation process of the praseodymium and neodymium concentrates, so as to accelerate the dissolution efficiency of the praseodymium and neodymium concentrates;

s2, after the praseodymium and neodymium enrichment is dissolved, adding water into the inner side of the filter cylinder through a water input pipe, diluting a mixed solution of the praseodymium and neodymium enrichment and nitric acid by the water, and uniformly stirring the water and the mixed solution by a stirring rod to quickly and uniformly mix the mixed solution with the water to prepare praseodymium and neodymium enrichment feed liquid containing insoluble impurities;

s3, along with the rotation of the driving shaft, the lifting lantern ring continuously rises under the driving of the driving shaft, the outer cross plate is driven by the inner cross plate to push the second threaded sleeve upwards, the second threaded sleeve compresses the second spring at the moment and simultaneously drives the second screw rod to rotate, the driven bevel gear is driven to rotate through the driving bevel gear when the second screw rod rotates, the driven bevel gear drives the first screw rod to rotate, the first threaded sleeve drives the arc-shaped sealing plate to move towards the direction of the adjacent driven bevel gear, at the moment, the arc-shaped sealing plate is gradually separated from the outer side of the filter cylinder, the stirring rod is blocked by the filter cylinder in the separation process of the arc-shaped sealing plate, and the stirring rod gradually rotates by taking the suspension shaft as the axis;

s4, after the arc-shaped sealing plate is separated from the outer side of the filter cylinder, praseodymium and neodymium enriched material liquid at the inner side of the filter cylinder is thrown out under the drive of the filter cylinder which continuously rotates, flows to the top of the separation plate between the filter cylinder and the arc-shaped sealing plate, is output through a discharging pipe at the middle part of the right side of the feed cylinder, and insoluble impurities stay at the inner side of the filter cylinder;

s5, when the second spring cannot be continuously compressed, the second threaded sleeve cannot continuously ascend, the arc-shaped sealing plate does not move any more, at the moment, along with the continuous ascending of the lifting lantern ring, the first spring is stretched, meanwhile, the lifting lantern ring pushes the T-shaped shaft, the T-shaped shaft drives the base and the filter bucket to continuously move upwards, when the lifting lantern ring is driven to move to the top end of the reciprocating thread, the driving motor is stopped, at the moment, all insoluble impurities fall into the inner side of the filter bucket and are collected, then all the insoluble impurities are taken out from the inner side of the filter bucket, and finally the driving motor is started again, so that the driving motor drives all components to reset;

s6, carrying out ultrasonic fractionation extraction on the praseodymium and neodymium enriched material liquid to obtain an enriched liquid containing neodymium nitrate, carrying out ultrasonic extraction on the enriched liquid containing neodymium nitrate to obtain a neodymium nitrate refined liquid, carrying out adsorption impurity removal and solid-liquid separation on the neodymium nitrate refined liquid to obtain a pure neodymium nitrate refined liquid, carrying out stirring precipitation and solid-liquid separation on the pure neodymium nitrate refined liquid to obtain a neodymium fluoride precipitate, and carrying out burning, hydrogen crushing and oxidation treatment on the neodymium fluoride precipitate to obtain the superfine neodymium oxide.

The invention has the technical effects and advantages that:

according to the invention, the filtering mechanism, the liquid discharging mechanism, the limiting mechanism and the guiding driving mechanism are arranged, so that the filtering mechanism is used for mixing the praseodymium and neodymium enriched object and nitric acid at first, meanwhile, the liquid discharging mechanism is used for stirring the mixed praseodymium and neodymium enriched object and nitric acid, after the dilution water is added, the liquid discharging mechanism can be used for accelerating the mixing speed of the dilution water and the mixed liquid, the insoluble impurity lifting mechanism can be driven in the working process of the filtering mechanism, the guiding driving mechanism is driven by the limiting mechanism, the liquid discharging mechanism is opened after the dilution is finished, the praseodymium and neodymium enriched object liquid is discharged, and finally, the insoluble impurity lifting mechanism can also be used for outputting the insoluble impurities filtered out from the inner side of the filtering mechanism.

Drawings

Fig. 1 is a schematic view of the overall front cross-sectional structure of the present invention.

Fig. 2 is a schematic diagram of a front cross-sectional structure of a liquid discharge mechanism and an insoluble impurity lifting mechanism according to the present invention.

Fig. 3 is a schematic diagram of a front cross-sectional structure of a limiting mechanism and a guiding driving mechanism of the present invention.

In the figure: 1. a charging barrel; 2. a partition plate; 3. a filtering mechanism; 31. a mounting plate; 32. a driving motor; 33. a drive shaft; 34. a rotating disc; 35. a filter cartridge; 4. a liquid discharge mechanism; 41. an arc-shaped sealing plate; 42. a suspension shaft; 43. a stirring rod; 44. a telescopic rod; 45. a first threaded sleeve; 46. a first screw; 47. a driven bevel gear; 5. an insoluble impurity lifting mechanism; 51. a T-shaped shaft; 52. a base; 53. a filter bucket; 54. lifting the lantern ring; 6. a limiting mechanism; 61. an inner cross plate; 62. a slide bar; 63. a first spring; 64. an outer cross plate; 7. a guide driving mechanism; 71. a second screw; 72. a side plate; 73. a second spring; 74. a second threaded sleeve; 75. a drive bevel gear; 8. a nitric acid input tube; 9. a water input pipe.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Example 1

The invention provides a preparation method of high-dispersity ultrafine neodymium oxide, which is shown in figures 1-3, wherein the preparation method of the high-dispersity ultrafine neodymium oxide is realized by using preparation equipment of the high-dispersity ultrafine neodymium oxide, the preparation equipment of the high-dispersity ultrafine neodymium oxide comprises a charging barrel 1, a partition plate 2 is fixedly arranged in the middle of the inner side of the charging barrel 1, a filtering mechanism 3 is arranged on the partition plate 2, a liquid draining mechanism 4 is arranged at the top of the outer side of the filtering mechanism 3, a stirring rod 43 in the liquid draining mechanism 4 is used for stirring materials on the inner side of a filter cylinder 35 in the filtering mechanism 3, an insoluble impurity lifting mechanism 5 is arranged in the filtering mechanism 3, a driving shaft 33 in the filtering mechanism 3 is used for driving a lifting lantern ring 54 in the insoluble impurity lifting mechanism 5 to lift, limiting mechanisms 6 are arranged at the bottoms of the two sides of the filtering mechanism 3, an outer transverse plate 64 in the insoluble impurity lifting lantern ring 54 is driven to lift in the limiting mechanism 6, guide driving mechanisms 7 are arranged on the two side walls of the inner side of the charging barrel 1, the outer transverse plate 64 in the limiting mechanism 6 is used for driving a guide driving mechanism 7, a guide driving mechanism 74 in the outer transverse plate 64 is driven by the limiting mechanism 6 to lift a guide driving mechanism 74, and a water inlet pipe 9 is arranged on the water inlet pipe 9.

As shown in fig. 2 and 3, the filtering mechanism 3 includes a mounting plate 31, a driving motor 32, a driving shaft 33, a rotating disc 34 and a filter cartridge 35, wherein the mounting plate 31 is fixedly disposed at the bottom of the inner side of the cartridge 1, the driving motor 32 is fixedly disposed at the bottom of the mounting plate 31, the driving shaft 33 is disposed at the top of the mounting plate 31 and is in transmission connection with the driving motor 32, the rotating disc 34 is fixedly sleeved on the top of the outer side of the driving shaft 33, and the filter cartridge 35 is fixedly disposed at the top of the rotating disc 34.

Through setting up above-mentioned structure to driving motor 32 drives rotary disk 34 and filter cartridge 35 rotation through drive shaft 33, and then drives the material synchronous motion of filter cartridge 35 inboard.

As shown in fig. 2, the liquid draining mechanism 4 includes two liquid draining components, the liquid draining components include an arc-shaped sealing plate 41, a suspension shaft 42, a stirring rod 43, a telescopic rod 44, a first threaded sleeve 45, a first screw 46 and a driven bevel gear 47, wherein the nitric acid input pipe 8 and the water input pipe 9 are respectively fixed to penetrate through and are arranged at the top of the outer sides of the two arc-shaped sealing plates 41, the arc-shaped sealing plate 41 is attached to the outer sides of the filter cylinders 35, the suspension shaft 42 is fixedly arranged at the inner sides of the arc-shaped sealing plates 41, the stirring rod 43 is rotatably sleeved on the outer sides of the suspension shaft 42 through a bearing, the telescopic rod 44 is fixedly arranged at the top of the outer sides of the arc-shaped sealing plates 41, the end part of the telescopic rod 44 is fixedly connected with the inner wall of the feed cylinder 1, the first threaded sleeve 45 is fixedly arranged at the outer bottom of the outer sides of the arc-shaped sealing plates 41, the first screw 46 is in threaded connection with the inner sides of the first threaded sleeve 45, the first screw 46 is rotatably nested on the inner walls of the feed cylinder 1 through a bearing, and the driven bevel gear 47 is fixedly sleeved on the outer sides of the first screw 46.

Through setting up above-mentioned structure to drive first screw rod 46 rotation when driven bevel gear 47 is rotatory, first screw rod 46 then drives arc closing plate 41 through first screw sleeve 45 and moves to the direction that is close to adjacent driven bevel gear 47, and then makes arc closing plate 41 break away from by the filter cartridge 35 outside, releases the seal to filter cartridge 35.

As shown in fig. 2 and 3, the insoluble impurity lifting mechanism 5 includes a T-shaped shaft 51, a base 52, a filter bucket 53 and a lifting collar 54, where the T-shaped shaft 51 is slidably nested inside the driving shaft 33, the base 52 is rotatably sleeved on the top end of the T-shaped shaft 51 through a bearing and slidably disposed inside the filter drum 35, the filter bucket 53 is fixedly disposed on the top of the base 52, and the lifting collar 54 is sleeved outside the driving shaft 33 and is in transmission connection with the driving shaft 33 through a reciprocating thread outside the driving shaft 33.

Through setting up above-mentioned structure to lift lantern ring 54 promotes T shape axle 51 in the ascending process, and then makes T shape axle 51 drive base 52 and filter pulp 53 and rise in the filter cartridge 35 inboard.

As shown in fig. 3, the limiting mechanism 6 includes an inner transverse plate 61, a sliding rod 62, a first spring 63 and an outer transverse plate 64, where the inner transverse plate 61 is fixedly disposed on the side surface of the T-shaped shaft 51, the sliding rod 62 and the first spring 63 are both provided with two sliding rods 62 respectively penetrating through the top of the inner transverse plate 61, the two first springs 63 are respectively sleeved on the outer sides of the two sliding rods 62, the outer transverse plate 64 is located at the bottom of the inner transverse plate 61 and fixedly connected with the two sliding rods 62, one end of the first spring 63 is fixedly connected with the inner transverse plate 61, and the other end of the first spring 63 is fixedly connected with the outer transverse plate 64.

Through setting up above-mentioned structure to when lift lantern ring 54 drove interior diaphragm 61 and rise, interior diaphragm 61 drives outer diaphragm 64 synchronous rising through slide bar 62 and first spring 63, and when outer diaphragm 64 was stopped, interior diaphragm 61 was stretched first spring 63 in the in-process that continues to rise.

As shown in fig. 3, the guiding driving mechanism 7 includes a second screw 71, a side plate 72, a second spring 73, a second threaded sleeve 74 and a driving bevel gear 75, where the second screw 71 is disposed on a top side of the partition plate 2 in a penetrating manner, and is rotationally connected with the partition plate 2 through a bearing, the side plate 72, the second spring 73 and the second threaded sleeve 74 are sequentially sleeved on an outer side of the second screw 71 from top to bottom, the side plate 72 is fixedly connected with an inner wall of the charging barrel 1, one end of the second spring 73 is fixedly connected with the side plate 72, the other end of the second spring 73 is fixedly connected with the second threaded sleeve 74, the second threaded sleeve 74 is in threaded connection with the second screw 71, and the driving bevel gear 75 is fixedly disposed on a top end of the second screw 71 and is meshed with the driven bevel gear 47.

By providing the above structure, when the outer cross plate 64 pushes the second threaded sleeve 74 to rise, the second threaded sleeve 74 compresses the second spring 73 and simultaneously drives the second screw 71 to rotate, and the second screw 71 drives the drive bevel gear 75 to rotate synchronously, thereby driving the driven bevel gear 47.

Example 2

The preparation method of the high-dispersity superfine neodymium oxide specifically comprises the following steps:

s1, adding praseodymium and neodymium concentrates into the inner side of a filter drum 35 from an opening at the top of the filter drum 35, then inputting nitric acid into the inner side of the filter drum 35 through a nitric acid input pipe 8, accumulating the praseodymium and neodymium concentrates on the top of a filter bucket 53, dissolving the praseodymium and neodymium concentrates by the nitric acid, then starting a driving motor 32, driving a rotating disk 34 and the filter drum 35 to rotate by the driving motor 32 through a driving shaft 33, simultaneously driving a base 52 and the filter bucket 53 to rotate by the driving motor 32 through a T-shaped shaft 51, synchronously rotating the praseodymium and neodymium concentrates and the nitric acid, and stirring the praseodymium and neodymium concentrates and the nitric acid by two stirring rods 43 which are stationary in the continuous rotation process of the praseodymium and neodymium concentrates, so as to accelerate the dissolving efficiency of the praseodymium and neodymium concentrates;

s2, after the praseodymium and neodymium enrichment is dissolved, adding water into the inner side of the filter cylinder 35 through the water input pipe 9, diluting a mixed solution of the praseodymium and neodymium enrichment and nitric acid by the water, and uniformly stirring the water and the mixed solution by the stirring rod 43, so that the mixed solution and the water are rapidly and uniformly mixed, and praseodymium and neodymium enrichment feed liquid containing insoluble impurities is prepared;

s3, along with the rotation of the driving shaft 33, the lifting collar 54 continuously rises under the driving of the driving shaft 33, the outer transverse plate 64 is driven by the inner transverse plate 61 to push the second threaded sleeve 74 upwards, the second threaded sleeve 74 compresses the second spring 73 at the moment and simultaneously drives the second screw 71 to rotate, the driven bevel gear 47 is driven by the driving bevel gear 75 to rotate when the second screw 71 rotates, the driven bevel gear 47 drives the first screw 46 to rotate, the first threaded sleeve 45 drives the arc-shaped sealing plate 41 to move towards the direction of the adjacent driven bevel gear 47, at the moment, the arc-shaped sealing plate 41 is gradually separated from the outer side of the filter cylinder 35, the stirring rod 43 is blocked by the filter cylinder 35 in the separation process of the arc-shaped sealing plate 41, and the stirring rod 43 gradually rotates by taking the suspension shaft 42 as the axis;

s4, after the arc-shaped sealing plate 41 is separated from the outer side of the filter cylinder 35, praseodymium and neodymium enriched material liquid on the inner side of the filter cylinder 35 is thrown out under the drive of the filter cylinder 35 which continuously rotates, flows to the top of the separation plate 2 between the filter cylinder 35 and the arc-shaped sealing plate 41, is output through a discharging pipe in the middle of the right side of the feed cylinder 1, and insoluble impurities stay on the inner side of the filter cylinder 35;

s5, when the second spring 73 cannot be continuously compressed, the second threaded sleeve 74 cannot be continuously lifted, the arc-shaped sealing plate 41 is not moved any more, at the moment, along with the continuous lifting of the lifting sleeve ring 54, the first spring 63 is stretched, meanwhile, the lifting sleeve ring 54 pushes the T-shaped shaft 51, the T-shaped shaft 51 drives the base 52 and the filter bucket 53 to continuously move upwards, when the lifting sleeve ring 54 is driven to move to the top end of the reciprocating threads, the driving motor 32 is stopped, at the moment, all insoluble impurities fall into the inner side of the filter bucket 53 and are collected, then all the insoluble impurities are taken out from the inner side of the filter bucket 53, and finally the driving motor 32 is started again, so that the driving motor 32 drives all components to reset;

s6, carrying out ultrasonic fractionation extraction on the praseodymium and neodymium enriched material liquid to obtain an enriched liquid containing neodymium nitrate, carrying out ultrasonic extraction on the enriched liquid containing neodymium nitrate to obtain a neodymium nitrate refined liquid, carrying out adsorption impurity removal and solid-liquid separation on the neodymium nitrate refined liquid to obtain a pure neodymium nitrate refined liquid, carrying out stirring precipitation and solid-liquid separation on the pure neodymium nitrate refined liquid to obtain a neodymium fluoride precipitate, and carrying out burning, hydrogen crushing and oxidation treatment on the neodymium fluoride precipitate to obtain the superfine neodymium oxide.

Finally, it should be noted that: the foregoing description is only illustrative of the preferred embodiments of the present invention, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present invention.

Claims (1)

1. A preparation method of high-dispersivity superfine neodymium oxide is characterized in that: the preparation method of the high-dispersity ultrafine neodymium oxide is realized by using preparation equipment of the high-dispersity ultrafine neodymium oxide, the preparation equipment of the high-dispersity ultrafine neodymium oxide comprises a charging barrel (1), a partition plate (2) is fixedly arranged in the middle of the inner side of the charging barrel (1), a filtering mechanism (3) is arranged on the partition plate (2), a liquid discharging mechanism (4) is arranged at the top of the outer side of the filtering mechanism (3), a stirring rod (43) in the liquid discharging mechanism (4) stirs materials on the inner side of a filter cylinder (35) in the filtering mechanism (3), an insoluble impurity lifting mechanism (5) is arranged in the filtering mechanism (3), a driving shaft (33) in the filtering mechanism (3) drives a lifting lantern ring (54) in the filtering mechanism (5), limiting mechanisms (6) are arranged at the bottoms of the two sides of the filtering mechanism (3), the lifting lantern ring (54) in the insoluble impurity lifting mechanism (5) drives an outer transverse plate (64) in the limiting mechanism (6), guide mechanisms (7) are arranged on the two side walls in the inner side wall of the charging barrel (1) respectively, the guide mechanisms (7) drive the guide mechanisms (74) in the second guide mechanisms (74), the liquid discharge mechanism (4) is provided with a nitric acid input pipe (8) and a water input pipe (9);

the filtering mechanism (3) comprises a mounting plate (31), a driving motor (32), a driving shaft (33), a rotating disc (34) and a filter cartridge (35);

the rotary disc (34) is fixedly sleeved on the top outside the driving shaft (33), and the filter cylinder (35) is fixedly arranged on the top of the rotary disc (34);

the liquid draining mechanism (4) comprises two liquid draining components, wherein the liquid draining components comprise an arc-shaped sealing plate (41), a suspension shaft (42), a stirring rod (43), a telescopic rod (44), a first threaded sleeve (45), a first screw rod (46) and a driven bevel gear (47);

the nitric acid input pipe (8) and the water input pipe (9) are respectively fixedly arranged at the top of the outer sides of the two arc-shaped sealing plates (41) in a penetrating mode, the arc-shaped sealing plates (41) are attached to the outer sides of the filter cylinders (35), the hanging shafts (42) are fixedly arranged on the inner sides of the arc-shaped sealing plates (41), the stirring rods (43) are rotatably sleeved on the outer sides of the hanging shafts (42) through bearings, the telescopic rods (44) are fixedly arranged at the top of the outer sides of the arc-shaped sealing plates (41), the end parts of the telescopic rods (44) are fixedly connected with the inner walls of the feed cylinders (1), the first threaded sleeves (45) are fixedly arranged at the bottoms of the outer sides of the arc-shaped sealing plates (41), the first threaded sleeves (46) are in threaded connection with the inner sides of the first threaded sleeves (45), the first threaded rods (46) are rotatably sleeved on the inner walls of the feed cylinders (1) through bearings in a sleeved mode, and the driven bevel gears (47) are fixedly sleeved on the outer sides of the first threaded sleeves (46).

The insoluble impurity lifting mechanism (5) comprises a T-shaped shaft (51), a base (52), a filter bucket (53) and a lifting collar (54);

the T-shaped shaft (51) is arranged on the inner side of the driving shaft (33) in a sliding nested mode, the base (52) is sleeved on the top end of the T-shaped shaft (51) through a bearing in a rotating mode and is arranged on the inner side of the filter cylinder (35) in a sliding mode, the filter bucket (53) is fixedly arranged on the top of the base (52), and the lifting lantern ring (54) is sleeved on the outer side of the driving shaft (33) and is in transmission connection with the driving shaft (33) through reciprocating threads on the outer side of the driving shaft (33);

the limiting mechanism (6) comprises an inner transverse plate (61), a sliding rod (62), a first spring (63) and an outer transverse plate (64);

the inner transverse plate (61) is fixedly arranged on the side face of the T-shaped shaft (51), two sliding rods (62) and first springs (63) are respectively arranged, the two sliding rods (62) are respectively and slidably penetrated through the tops of the inner transverse plate (61), the two first springs (63) are respectively sleeved on the outer sides of the two sliding rods (62), the outer transverse plate (64) is positioned at the bottom of the inner transverse plate (61) and fixedly connected with the two sliding rods (62), one end of each first spring (63) is fixedly connected with the inner transverse plate (61), and the other end of each first spring is fixedly connected with the outer transverse plate (64);

the guide driving mechanism (7) comprises a second screw (71), a side plate (72), a second spring (73), a second threaded sleeve (74) and a drive bevel gear (75);

the second screw rod (71) penetrates through the side surface of the top of the separation plate (2) and is rotationally connected with the separation plate (2) through a bearing, the side plate (72), the second spring (73) and the second threaded sleeve (74) are sequentially sleeved on the outer side of the second screw rod (71) from top to bottom, the side plate (72) is fixedly connected with the inner wall of the charging barrel (1), one end of the second spring (73) is fixedly connected with the side plate (72) and the other end of the second spring is fixedly connected with the second threaded sleeve (74), the second threaded sleeve (74) is in threaded connection with the second screw rod (71), and the driving bevel gear (75) is fixedly arranged at the top end of the second screw rod (71) and is meshed with the driven bevel gear (47);

the preparation method of the high-dispersity superfine neodymium oxide specifically comprises the following steps:

s1, adding praseodymium and neodymium concentrates into the inner side of a filter cartridge (35) through an opening at the top of the filter cartridge (35), then inputting nitric acid into the inner side of the filter cartridge (35) through a nitric acid input pipe (8), accumulating the praseodymium and neodymium concentrates on the top of a filter bucket (53), dissolving the praseodymium and neodymium concentrates by the nitric acid, then starting a driving motor (32), driving a rotating disc (34) and the filter cartridge (35) to rotate by the driving motor (32) through a driving shaft (33), driving a base (52) and the filter bucket (53) to rotate by the driving motor (32) through a T-shaped shaft (51), synchronously rotating the praseodymium and neodymium concentrates and the nitric acid, and stirring the praseodymium and neodymium concentrates and the nitric acid by two stirring rods (43) which are stationary in the continuous rotation process of the praseodymium and neodymium concentrates, so as to accelerate the dissolving efficiency of the praseodymium and neodymium concentrates;

s2, after the praseodymium and neodymium enrichment is dissolved, adding water into the inner side of a filter cylinder (35) through a water input pipe (9), diluting a mixed solution of the praseodymium and neodymium enrichment and nitric acid by the water, and uniformly stirring the water and the mixed solution by a stirring rod (43) to quickly and uniformly mix the mixed solution with the water to prepare praseodymium and neodymium enrichment feed liquid containing insoluble impurities;

s3, along with the rotation of the driving shaft (33), the lifting collar (54) continuously ascends under the driving of the driving shaft (33), the outer transverse plate (64) is driven by the inner transverse plate (61) to push the second threaded sleeve (74) upwards, the second threaded sleeve (74) compresses the second spring (73) at the moment, meanwhile, the second screw (71) is driven to rotate, the driven bevel gear (47) is driven to rotate through the driving bevel gear (75) when the second screw (71) rotates, the driven bevel gear (47) drives the first screw (46) to rotate, the first threaded sleeve (45) drives the arc-shaped sealing plate (41) to move towards the direction of the adjacent driven bevel gear (47), at the moment, the arc-shaped sealing plate (41) is gradually separated from the outer side of the filter cylinder (35), and the stirring rod (43) is blocked by the filter cylinder (35) in the separation process of the arc-shaped sealing plate (41), and further gradually rotates by taking the suspension shaft (42) as an axis;

s4, after the arc-shaped sealing plate (41) is separated from the outer side of the filter cylinder (35), praseodymium and neodymium enriched material liquid on the inner side of the filter cylinder (35) is thrown out under the drive of the filter cylinder (35) which continuously rotates, flows to the top of the separation plate (2) between the filter cylinder (35) and the arc-shaped sealing plate (41), is output through a discharging pipe in the middle of the right side of the feed cylinder (1), and insoluble impurities stay on the inner side of the filter cylinder (35);

s5, when the second spring (73) cannot be continuously compressed, the second threaded sleeve (74) cannot continuously ascend, the arc-shaped sealing plate (41) cannot move any more, at the moment, along with the continuous ascending of the lifting sleeve ring (54), the first spring (63) is stretched, the lifting sleeve ring (54) pushes the T-shaped shaft (51) at the same time, the T-shaped shaft (51) drives the base (52) and the filter bowl (53) to continuously move upwards, when the lifting sleeve ring (54) is driven to move to the top end of the reciprocating thread, the driving motor (32) is stopped, at the moment, all insoluble impurities fall into the inner side of the filter bowl (53) and are collected, then all the insoluble impurities are taken out from the inner side of the filter bowl (53), and finally the driving motor (32) is started again, so that the driving motor (32) drives all components to reset;

s6, carrying out ultrasonic fractionation extraction on the praseodymium and neodymium enriched material liquid to obtain an enriched liquid containing neodymium nitrate, carrying out ultrasonic extraction on the enriched liquid containing neodymium nitrate to obtain a neodymium nitrate refined liquid, carrying out adsorption impurity removal and solid-liquid separation on the neodymium nitrate refined liquid to obtain a pure neodymium nitrate refined liquid, carrying out stirring precipitation and solid-liquid separation on the pure neodymium nitrate refined liquid to obtain a neodymium fluoride precipitate, and carrying out burning, hydrogen crushing and oxidation treatment on the neodymium fluoride precipitate to obtain the superfine neodymium oxide.