CN113908932A - Method and device for continuously refining and grading magnetic powder - Google Patents
Method and device for continuously refining and grading magnetic powder Download PDFInfo
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- CN113908932A CN113908932A CN202111113116.2A CN202111113116A CN113908932A CN 113908932 A CN113908932 A CN 113908932A CN 202111113116 A CN202111113116 A CN 202111113116A CN 113908932 A CN113908932 A CN 113908932A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/10—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls with one or a few disintegrating members arranged in the container
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/16—Mills in which a fixed container houses stirring means tumbling the charge
- B02C17/163—Stirring means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/18—Details
- B02C17/183—Feeding or discharging devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/14—Separating or sorting of material, associated with crushing or disintegrating with more than one separator
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
- B03C1/10—Magnetic separation acting directly on the substance being separated with cylindrical material carriers
- B03C1/12—Magnetic separation acting directly on the substance being separated with cylindrical material carriers with magnets moving during operation; with movable pole pieces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/42—Drive mechanisms, regulating or controlling devices, or balancing devices, specially adapted for screens
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
- B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
Abstract
The invention discloses a method and a device for continuously refining and grading magnetic powder, and relates to the technical field of magnetic materials. The method and the device for continuously refining and grading the magnetic powder realize magnetic powder attraction and desorption by utilizing the magnetic field change generated by the C-shaped electric brush and the electrode strip at different positions on the circumferential surface in the rotating process, independently realize the solid-liquid separation of the organic solution and the magnetic powder, and realize high-efficiency solid-liquid separation.
Description
Technical Field
The invention relates to the technical field of magnetic materials, in particular to a method and a device for continuously refining and grading magnetic powder.
Background
Permanent magnet materials have played an important role in the fields of motors, computers, medical instruments, electronic communication and the like, and particularly, the permanent magnet materials have higher requirements on the rising of computer technology and new energy automobiles. Compared with a metal permanent magnet material and a ferrite permanent magnet material, the rare earth permanent magnet represents a qualitative leap in the performance of the permanent magnet material, and can better meet the industrial requirements.
The coercive force is a big characteristic of the permanent magnetic material, and for the rare earth permanent magnetic material, besides the relationship with the material components, the coercive force is also closely related with the grain size of the rare earth permanent magnetic material. The closer the magnetic powder particles are to a single domain, the higher the intrinsic coercivity of the magnetic powder is. And the single domain size of the rare earth permanent magnetic material is about 1 micron. Therefore, the rapidly quenched or solidified flaky magnetic powder needs to be further refined to improve the intrinsic coercive force of the magnet.
At present, the most commonly used methods for refining magnetic powder comprise a traditional ball milling method and an airflow milling method, for example, the ball milling method is selected to crush and refine the powder when the patents CN 110400254A and CN 108962579A prepare rare earth materials, and the airflow milling method is selected to crush and refine the powder when the patents CN 111640549A and CN 111326304A prepare rare earth materials, but the traditional ball milling method has low efficiency due to intermittent processing, needs repeated canning, cannot continue to refine after reaching the ball milling limit, and has uneven particle size distribution; the patent CN 1111435617 a indicates that the particles crushed by ball milling or jet milling are mostly long-strip or diamond-shaped, which may cause adverse effects on the performance of the magnet, so they propose to crush the powder by using a high-pressure supersonic atomization method, which improves the quality of the powder and the uniformity of the particle size distribution of the powder to a certain extent, but the particle size of the finally obtained powder is too large and continuous production cannot be realized.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a method and a device for continuously refining and grading magnetic powder, which solve the problems of discontinuous refining process, low working efficiency and non-centralized grain size distribution in the conventional hard and brittle magnetic powder crushing and refining.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: a magnetic separator for solid-liquid separation comprising:
the device comprises a first supporting cylinder and a second supporting cylinder, wherein the diameter of the first supporting cylinder is larger than that of the second supporting cylinder, and the first supporting cylinder and the second supporting cylinder are coaxial and are fixedly connected through the end face of the second supporting cylinder; the lower part of the second supporting cylinder is positioned in a liquid containing groove; the liquid containing tank is used for containing dispersion liquid containing magnetically selected particles; the first supporting cylinder and the second supporting cylinder coaxially rotate under the drive of a motor;
the front parts of the electrode strips are fixed on the outer wall of the first supporting cylinder along the axial direction of the first supporting cylinder, and the rear parts of the electrode strips are fixed on the inner wall of the second supporting cylinder along the axial direction of the second supporting cylinder; the plurality of electrode strips are uniformly distributed along the circumferential direction of the supporting cylinder; in order to realize relative continuity of the subsequently formed magnetic regions, the distance between adjacent electrode strips uniformly distributed in the circumferential direction on the inner wall of the second supporting cylinder is not more than 5 mm;
the first supporting cylinder is sleeved with a C-shaped electric brush with a fixed position and used for electrifying partial electrode strips, when the first supporting cylinder rotates, partial electrode strips in contact with the C-shaped electric brush are electrified, and the electrified electrode strips form a C-shaped magnetic area corresponding to the C-shaped electric brush; the second supporting cylinder absorbs magnetic powder from the liquid containing groove in the C-shaped magnetic area and is attached to the outer wall; under the drive of a motor, the magnetic powder is rotated to a non-magnetic area, and the magnetic powder attached to the outer wall is scraped down to a collecting tank through a scraper.
The invention also relates to a device for continuously refining and grading magnetic powder, which sequentially comprises a feeding module, a magnetic powder refining module, a coarse powder vibrating and screening module and the magnetic separator for solid-liquid separation in claim 1; and magnetic powder to be treated is sequentially subjected to magnetic powder refining and coarse and fine powder vibration screening to form dispersion liquid of magnetic separation particles, and the dispersion liquid is separated and collected by the magnetic separator for solid-liquid separation.
Further, the magnetic powder refining module comprises a refining cavity, an extrusion auger fixed in the refining cavity and grinding beads dispersed in the refining cavity, and a screen is arranged at a discharge port of the refining cavity; the extruding auger is driven by a motor; and the magnetic powder material is extruded to the discharge port under the action of the extrusion auger, simultaneously drives the grinding beads to move and grinds the material, and finally the refined material is conveyed to the next stage after being separated by the screen.
Further, the feeding module comprises a stirring barrel, the stirring barrel is connected with the feeding hole of the refining cavity through a pipeline, and a countercurrent-preventing pushing pump is arranged on the pipeline.
Further, the coarse powder and fine powder vibrating and screening part comprises an inclined vibrating screen and a liquid collecting tank; the vibrating screen is positioned in the liquid collecting tank; the material extruded from the magnetic powder refining part falls onto the vibrating screen, and the small-particle material is directly screened into a liquid collecting tank to be conveyed to the next stage; large particle materials remaining on the vibrating screen move downwards along the surface of the vibrating screen and fall into a coarse powder collecting tank.
Further, the device also comprises a return pipe used for conveying the liquid in the liquid containing tank to the feeding module; after being adsorbed by the second supporting cylinder, the dispersion liquid containing magnetic separation particles in the liquid of the liquid containing tank flows to the liquid outlet, is filtered to the return pipe by the filter screen and flows back to the feeding module.
The invention also relates to a method for continuously refining and grading magnetic powder, which is realized on the basis of the device of claim 2 and comprises the following steps;
feeding the coarse magnetic powder and the ball-milling solvent into a feeding module, sequentially carrying out magnetic powder refinement and coarse and fine powder vibration screening to form dispersion liquid containing magnetic separation particles, and separating and collecting the dispersion liquid through a magnetic separation separator for solid-liquid separation. Specifically, the coarse magnetic powder and a ball-milling solvent are stirred in a feeding module to form slurry, and the slurry enters a refining cavity through an anti-reflux push pump; in refining the intracavity, extrude to refining the discharge gate in chamber under the effect of extruding the auger, drive simultaneously and grind the pearl motion and grind the coarse magnetic powder in the thick liquids, carry the material after refining on the shale shaker of an incline after the screen cloth separation that lies in refining chamber discharge gate department at last, the tiny particle material directly sieves into to the collecting tank to carry to the flourishing cistern in, contain magnetism in the flourishing cistern after selecting granule dispersion through second support cylinder absorption magnetic, scrape through a scraper and fall to the collecting vat and collect.
Further, the ball milling solvent is organic solution such as normal hexane, gasoline, absolute ethyl alcohol and heptane, and 0.1-1% of oleic acid and 0.1-2% of anhydrous phosphoric acid relative to the weight of the magnetic powder to be processed are added into the organic solution; the magnetic powder comprises magnetic powder with hard and brittle characteristics such as neodymium iron boron, samarium iron nitrogen, samarium iron carbon, samarium cobalt, aluminum nickel cobalt and iron nitride.
Further, the grinding beads account for 70% -80% of the volume of the refining cavity; the grinding beads are selected from zirconia, alumina, stainless steel.
(III) advantageous effects
The invention provides a method and a device for continuously refining and grading magnetic powder. The method has the following beneficial effects:
(1) the traditional ball milling method is to load magnetic powder into a ball milling device, and take out the magnetic powder after ball milling for a period of time to separate the magnetic powder from a solvent, and is an intermittent refining method, wherein the ball milling working time of several hours is usually required for realizing that the average particle size meets the size requirement, and two kinds of magnetic powder which are too thin and too thick and do not conform to the size are usually generated at the same time, so that the normal distribution of the size of the magnetic powder is very discrete; by adopting the device, the fine magnetic powder reaching the particle size only needs several seconds from the feeding hole to the discharging hole, and the two-stage separation of the screen and the vibrating screen in the refining cavity is realized by ball milling, so that the fine magnetic powder reaching the size requirement can be effectively and directly separated and collected, the problem that the magnetic powder reaching the particle size is repeatedly ball milled and is excessively fine in the traditional ball milling process is avoided, and the normal distribution of the size of the refined and classified magnetic powder is very concentrated.
(2) The magnetic powder attraction and desorption are realized by utilizing the magnetic field change generated by the C-shaped electric brush and the electrode strip at different positions on the circumferential surface in the rotating process, the solid-liquid separation of the organic solution and the magnetic powder is automatically realized, and the high-efficiency solid-liquid separation is realized.
(3) The continuous refining and grading method and device for the magnetic powder have the advantages that feeding and discharging are completely independent, continuous working can be achieved, inner circulation is formed with other processing devices, only manual feeding and finished product collection are needed, time and labor are saved, working efficiency is greatly improved, all parts are connected to form a circulation loop, organic solvent recovery can be achieved while continuous processing is achieved, the obtained rare earth magnetic powder particles can meet the requirement of particle size distribution concentration, working efficiency is greatly improved, and production cost is reduced.
(4) The method and the device for continuously refining and grading the magnetic powder have the advantages that the organic solvent and the surfactant are added during grinding, on one hand, heat generated by grinding can be absorbed, magnetic powder oxidation is prevented, on the other hand, the surfactant is added to improve the performance of the powder, the conventional ball milling always dries the refined powder and the solvent together to volatilize the solvent, the liquid containing tank is connected with the stirring barrel, the purified organic solvent directly enters the stirring barrel through the lifting pump to realize recycling, and the use amount of the organic solvent is greatly reduced.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic view of the present invention in partial cross-section;
FIG. 3 is a schematic structural view of a second support cylinder according to the present invention in partial cross section;
FIG. 4 is a schematic structural diagram of a side view perspective of a refining cavity of the present invention;
FIG. 5 is an enlarged schematic view of the structure at A in FIG. 1;
FIG. 6 is a schematic plan view of the present invention;
in the figure: 1. a stirring motor; 2. a return pipe; 3. a stirring barrel; 4. a second support cylinder; 5. an electrode strip; 6. a scraper; 7. a liquid containing groove; 8. a lift pump; 9. a second delivery pipe; 10. a reduction motor; 11. a belt; 12. a driving wheel; 13. a rotating shaft; 14. a discharge outlet; 15. a refining cavity; 16. a reverse flow prevention push pump; 17. vibrating screen; 18. a discharge outlet; 19. a first delivery pipe; 20. a first support cylinder; 21. a C-shaped electric brush; 22. a discharge pipe; 23. extruding the packing auger; 24. a stirring member; 25. screening a screen; 26. a ceramic bearing; 27. a liquid collecting tank; 28. a coarse powder collecting tank; 29. collection tank 29.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-5, the present invention provides a technical solution: a method and a device for continuously refining and grading magnetic powder comprise a stirring barrel 3, wherein a stirring motor 1 is fixedly arranged on the upper surface of the stirring barrel 3, a stirring piece 24 is rotatably connected to the top surface of the stirring barrel 3, and the output end of the stirring motor 1 is fixedly connected with the top end of the stirring piece 24;
a refining cavity 15 is arranged at the downstream of the stirring barrel 3, the stirring barrel 3 is communicated with the refining cavity 15 through a first conveying pipe 19, an anti-reflux push pump 16 is fixedly installed in the middle of the conveying pipe 19, the right end of the refining cavity 15 is rotatably connected with a rotating shaft 13, a speed reduction motor 10 is fixedly installed on the right side face of the refining cavity 15, the right end of the rotating shaft 13 and the output end of the speed reduction motor 10 are both fixedly connected with driving wheels 12, the two driving wheels 12 are in transmission connection through a belt 11, the rotating shaft 13 is connected with an extrusion auger 23, a discharge opening 14 is formed in the left side face of the refining cavity 15, a screen 25 is fixedly connected inside the discharge opening 14, and a discharge pipe 22 is fixedly connected to the left side face of the discharge opening 14;
the outlet of the discharge pipe 22 is located above an inclined vibrating screen 17 located in the sump 27; the material extruded from the magnetic powder refining part falls onto the vibrating screen 17, and the small-particle material is directly screened into the liquid collecting tank 27 to be conveyed to the next stage; the left side surface of the liquid collecting tank 27 is provided with a discharge opening 18, and large-particle materials remained on the vibrating screen 17 move downwards along the surface of the vibrating screen and fall into a coarse powder collecting tank 28 through the discharge opening 18.
A liquid containing groove 7 is formed in the left side of the liquid collecting groove 27, the liquid collecting groove 27 is connected with a feed inlet of the liquid containing groove 7 through a second conveying pipe 9, ceramic bearings 26 penetrate and are embedded in the front and the back of the liquid containing groove 7, supporting cylinders are erected in the two bearings and comprise a first supporting cylinder 20 on the outer portion and a second supporting cylinder 4 on the inner portion; a plurality of electrode strips 5 which are arranged at equal intervals along the axial direction are fixed on the support cylinder, specifically, the front parts of the electrode strips 5 are fixed on the outer wall of the first support cylinder 20 along the axial direction of the first support cylinder 20, and the rear parts of the electrode strips are fixed on the inner wall of the second support cylinder 4 along the axial direction of the second support cylinder 4; the plurality of electrode strips are uniformly distributed along the circumferential direction of the supporting cylinder;
the first supporting cylinder 20 is sleeved with a C-shaped electric brush to electrify part of the electrode strips, and the electrified electrode strips 5 form a C-shaped magnetic area corresponding to the position of the C-shaped electric brush; magnetic separation separates after 4 surfaces are supported to the pivoted second through the magnetic force effect with the magnetic powder absorption in the ball-milling solvent in this application, and each unit intermittent type formula on the second support section of thick bamboo 4 has magnetism and no magnetism, and when having magnetism, the magnetic of absorption mixing material when no magnetism, can scrape the back with absorbent magnetic through the scraper and collect after the magnetism falls. Specifically, the second supporting cylinder 20 adsorbs magnetic powder from the liquid containing tank in the C-shaped magnetic area and is attached to the outer wall; under the drive of a motor, the magnetic powder rotates to a non-magnetic area, and the magnetic powder attached to the outer wall is scraped down to a collecting tank 29 through a scraper 6.
Referring to fig. 1 and 2, the liquid tank 7 is communicated with the stirring barrel 3 through the return pipe 2, and the middle part of the return pipe 2 is fixedly provided with the lift pump 8, so that the ball milling solvent without magnetic powder can be conveyed into the stirring barrel 3 by the lift pump 8 to be recycled.
Referring to fig. 1 and 2, the inclination angle of the vibrating screen 17 is 15 ° to 30 °, which facilitates the sliding and discharging of the large magnetic particles.
Referring to fig. 1 and 2, the ball milling solvent in the stirring barrel 3 is organic solution such as n-hexane, gasoline, absolute ethanol and heptane, and the organic solution is usually added with 0.1-1% of oleic acid and 0.1-2% of anhydrous phosphoric acid relative to the weight of the magnetic powder to be processed.
A method for continuously refining and grading magnetic powder comprises the following steps;
s1, pouring the coarse magnetic powder and the ball-milling solvent into a stirring barrel 3, electrifying a stirring motor 1 to start and drive a stirring piece 24 to rotate, mechanically stir and mix, and then conveying the mixture into a refining cavity 15 through an anti-reflux push pump 16; the ball milling solvent can be organic solution such as n-hexane, gasoline, absolute ethyl alcohol and heptane, and 0.1-1% of oleic acid and 0.1-2% of anhydrous phosphoric acid relative to the weight of the magnetic powder to be treated are added into the organic solution, so as to improve the dispersibility among the refined magnetic powder, prevent agglomeration and improve the oxidation resistance of the magnetic powder; magnetic powder suitable for the invention comprises magnetic powder with hard and brittle characteristics such as neodymium iron boron, samarium iron nitrogen, samarium iron carbon, samarium cobalt, aluminum nickel cobalt, iron nitride and the like. The magnetic powder and the ball-milling solvent form slurry under the action of the stirring piece 24.
S2, the speed reducing motor 10 is electrified to start to drive the driving wheel 12 to rotate so as to drive the rotating shaft 13 and the extrusion packing auger 23 thereon to advance in a high-speed spiral manner, and simultaneously, the grinding beads are driven to move and the materials are ground and refined. The screen 25 inside the discharge opening 27 prevents the grinding balls and coarse magnetic powder from going out, and allows the fine magnetic powder and the ball-milling solvent reaching a certain particle size to flow out and fall onto the vibrating screen 17 through the discharge pipe 22; the grinding beads can be zirconia, alumina, stainless steel and the like, the grinding beads can adopt different particle size grading, for example, the diameter of 2-3mm accounts for 70%, the diameter of 5-6mm accounts for 10%, and the diameter of 0.5-1mm accounts for 20%, and effective particle size grading is favorable for further improving the ball milling efficiency and obtaining magnetic powder with normal distribution concentration. In general, the grinding beads account for 70-80% of the volume of the refining cavity, so that the refining effect can be ensured.
S3: after ball milling, separating fine magnetic powder with different particle sizes, separating the fine magnetic powder with different particle sizes in a vibrating screen 17, and enabling the powder and the ball milling solvent which reach the size requirement to enter a liquid collecting tank 27 through the vibrating screen 17; a discharge opening 18 is formed in the left side surface of the liquid collecting tank 27, and the lower end of the vibrating screen 17 is positioned at the discharge opening; the large-particle materials remained on the vibrating screen 17 move downwards along the surface of the vibrating screen, fall into a coarse powder collecting tank 28 through a discharge opening 18, and can be poured into the stirring barrel 3 for reprocessing;
s4: reach the magnetic powder of size requirement and ball-milling solvent's misce bene material and carry to liquid containing tank 7 through collecting tank 27, carry out the magnetic separation and separate, in this application, the magnetic separation is through magnetic force effect with the magnetic powder absorption in the ball-milling solvent after a pivoted barrel surface, each unit intermittent type formula on the barrel have magnetism and no magnetism, when having magnetism, adsorb the magnetic in the misce bene material, when no magnetism, can scrape the back with the adsorbed magnetic through the scraper and collect. And the ball milling solvent after removing the magnetic powder is conveyed to the inside of the stirring barrel 3 by a lifting pump 8 to realize cyclic utilization.
Typically, the C-shaped brush 21 may be a 240 ° ring brush.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation. The use of the phrase "comprising one of the elements does not exclude the presence of other like elements in the process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A magnetic separator for solid-liquid separation, comprising:
the device comprises a first supporting cylinder and a second supporting cylinder, wherein the diameter of the first supporting cylinder is larger than that of the second supporting cylinder, and the first supporting cylinder and the second supporting cylinder are coaxial and are fixedly connected through the end face of the second supporting cylinder; the lower part of the second supporting cylinder is positioned in a liquid containing groove; the liquid containing groove is used for containing dispersion liquid of the magnetic separation particles; the first supporting cylinder and the second supporting cylinder coaxially rotate under the drive of a motor;
the front parts of the electrode strips are fixed on the outer wall of the first supporting cylinder along the axial direction of the first supporting cylinder, and the rear parts of the electrode strips are fixed on the inner wall of the second supporting cylinder along the axial direction of the second supporting cylinder; the plurality of electrode strips are uniformly distributed along the circumferential direction of the supporting cylinder, and the distance between adjacent electrode strips uniformly distributed along the circumferential direction of the inner wall of the second supporting cylinder is not more than 5 mm;
the first supporting cylinder is sleeved with a C-shaped electric brush with a fixed position and used for electrifying partial electrode strips, when the first supporting cylinder rotates, partial electrode strips in contact with the C-shaped electric brush are electrified, and the electrified electrode strips form a C-shaped magnetic area corresponding to the C-shaped electric brush; the second supporting cylinder absorbs magnetic powder from the liquid containing groove in the C-shaped magnetic area and is attached to the outer wall; under the drive of a motor, the magnetic powder is rotated to a non-magnetic area, and the magnetic powder attached to the outer wall is scraped down to a collecting tank through a scraper.
2. A device for continuously refining and grading magnetic powder is characterized by sequentially comprising a feeding module, a magnetic powder refining module, a coarse powder vibrating and screening module and a magnetic separator for solid-liquid separation according to claim 1; and magnetic powder to be treated is sequentially subjected to magnetic powder refining and coarse and fine powder vibration screening to form dispersion liquid containing magnetic separation particles, and the dispersion liquid is separated and collected by a magnetic separator for solid-liquid separation.
3. The device according to claim 2, wherein the magnetic powder refining module comprises a refining cavity, an extrusion auger fixed in the refining cavity and grinding beads dispersed in the refining cavity, and a screen is arranged at a discharge port of the refining cavity; the extruding auger is driven by a motor; and the magnetic powder material is extruded to the discharge port under the action of the extrusion auger, simultaneously drives the grinding beads to move and grinds the material, and finally the refined material is conveyed to the next stage after being separated by the screen.
4. The device as claimed in claim 2, wherein the feeding module comprises a stirring barrel, the stirring barrel is connected with the feeding port of the refining chamber through a pipeline, and a backflow-preventing pushing pump is arranged on the pipeline.
5. The apparatus of claim 2 wherein said coarse and fine vibratory screening section comprises an inclined vibratory screen and a sump; the vibrating screen is positioned in the liquid collecting tank; the material extruded from the magnetic powder refining part falls onto the vibrating screen, and the small-particle material is directly screened into a liquid collecting tank to be conveyed to the next stage; large particle materials remaining on the vibrating screen move downwards along the surface of the vibrating screen and fall into a coarse powder collecting tank.
6. The apparatus of claim 2, further comprising a return line for delivering said reservoir liquid to said feed module; after being adsorbed by the second supporting cylinder, the dispersion liquid containing magnetic separation particles in the liquid of the liquid containing tank flows to the liquid outlet, is filtered to the return pipe by the filter screen and flows back to the feeding module.
7. A method for continuously refining and grading magnetic powder, which is realized on the basis of the device of claim 2 and is characterized by comprising the following steps;
sending the coarse magnetic powder and the ball-milling solvent into a feeding module, sequentially carrying out magnetic powder refinement and coarse and fine powder vibration screening to form dispersion liquid of magnetic separation particles, and separating and collecting by a magnetic separation separator for solid-liquid separation.
8. The method according to claim 7, wherein the coarse magnetic powder and the ball milling solvent are stirred in the feeding module to form slurry, and the slurry enters the refining chamber in an anti-reflux push pump; in refining the intracavity, extrude to refining the discharge gate in chamber under the effect of extruding the auger, drive simultaneously and grind the pearl motion and grind the coarse magnetic powder in the thick liquids, at last will refine the material after the screen cloth separation that is located refining chamber discharge gate department on the shale shaker of an incline, the granule material is directly sieved and is gone into to the collecting tank to carry to the flourishing cistern in, the magnetic separation granule dispersion in the flourishing cistern is after the second supports a section of thick bamboo absorption magnetic powder, scrape through a scraper and fall to the collecting vat and collect.
9. The method according to claim 7, wherein the ball milling solvent is an organic solution of n-hexane, gasoline, absolute ethanol, heptane or the like, and 0.1 to 1% of oleic acid and 0.1 to 2% of anhydrous phosphoric acid are added to the organic solution with respect to the weight of the magnetic powder to be treated; the magnetic powder comprises magnetic powder with hard and brittle characteristics such as neodymium iron boron, samarium iron nitrogen, samarium iron carbon, samarium cobalt, aluminum nickel cobalt and iron nitride.
10. The method of claim 7, wherein the grinding beads account for 70% -80% of the volume of the refining chamber; the grinding beads are selected from zirconia, alumina, stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115254321A (en) * | 2022-07-12 | 2022-11-01 | 青岛海湾化工设计研究院有限公司 | Wet ball mill for flue gas desulfurization |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1438876A (en) * | 2000-06-28 | 2003-08-27 | 史密斯克莱·比奇曼公司 | Wet milling process |
| CN102416399A (en) * | 2011-08-31 | 2012-04-18 | 云南罗平锌电股份有限公司 | Method of comprehensive recovery of iron, silver, copper and carbon from Zinc kiln slag |
| CN203955296U (en) * | 2014-06-27 | 2014-11-26 | 亳州正丰医药有限责任公司 | A kind of vibration type mill for producing extra micro powder machine |
| CN205925975U (en) * | 2016-08-19 | 2017-02-08 | 江西一元再生资源有限公司 | Improve mineral processing equipment that low -grade vulcanization type contains golden tailing gold recovery |
| CN106794469A (en) * | 2014-10-01 | 2017-05-31 | 住友重机械精科技株式会社 | Rotary drum-type magnetic separation |
| CN206996737U (en) * | 2017-07-13 | 2018-02-13 | 湖南创一电子科技有限公司 | The nanoscale grinding mechanism of SMT high-performance soft magnetic property materials |
| CN109248625A (en) * | 2018-11-09 | 2019-01-22 | 长沙万荣粉体设备科技有限公司 | A kind of magnetic materials production system of processing |
| CN211706649U (en) * | 2019-12-26 | 2020-10-20 | 浙江安特磁材有限公司 | Circulating ferrite compounding system |
| CN213000567U (en) * | 2020-07-14 | 2021-04-20 | 崔贞子 | Roller type electromagnetic filter for cold rolling emulsion |
-
2021
- 2021-09-22 CN CN202111113116.2A patent/CN113908932A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1438876A (en) * | 2000-06-28 | 2003-08-27 | 史密斯克莱·比奇曼公司 | Wet milling process |
| CN102416399A (en) * | 2011-08-31 | 2012-04-18 | 云南罗平锌电股份有限公司 | Method of comprehensive recovery of iron, silver, copper and carbon from Zinc kiln slag |
| CN203955296U (en) * | 2014-06-27 | 2014-11-26 | 亳州正丰医药有限责任公司 | A kind of vibration type mill for producing extra micro powder machine |
| CN106794469A (en) * | 2014-10-01 | 2017-05-31 | 住友重机械精科技株式会社 | Rotary drum-type magnetic separation |
| CN205925975U (en) * | 2016-08-19 | 2017-02-08 | 江西一元再生资源有限公司 | Improve mineral processing equipment that low -grade vulcanization type contains golden tailing gold recovery |
| CN206996737U (en) * | 2017-07-13 | 2018-02-13 | 湖南创一电子科技有限公司 | The nanoscale grinding mechanism of SMT high-performance soft magnetic property materials |
| CN109248625A (en) * | 2018-11-09 | 2019-01-22 | 长沙万荣粉体设备科技有限公司 | A kind of magnetic materials production system of processing |
| CN211706649U (en) * | 2019-12-26 | 2020-10-20 | 浙江安特磁材有限公司 | Circulating ferrite compounding system |
| CN213000567U (en) * | 2020-07-14 | 2021-04-20 | 崔贞子 | Roller type electromagnetic filter for cold rolling emulsion |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115254321A (en) * | 2022-07-12 | 2022-11-01 | 青岛海湾化工设计研究院有限公司 | Wet ball mill for flue gas desulfurization |
| CN115254321B (en) * | 2022-07-12 | 2023-07-07 | 青岛海湾化工设计研究院有限公司 | Wet ball mill for flue gas desulfurization |
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