A method for preparing fine particle high-efficiency purification composite magnetic filter material

Abstract

This invention discloses a method for preparing a high-efficiency, fine-particle, composite magnetic filter material. The prepared composite magnetic filter material is composed of sulfone aryl sulfone fibers, a metal mesh, glass fibers, a PTFE-mixed metal particle emulsion, and carbon fibers. This structure effectively enhances the magnetization properties of the metal mesh and magnetic particles, significantly improving the filter material's filtration efficiency and performance during dust removal and blowing. The magnetization device utilizes an alternating arrangement of electromagnets and permanent magnets, combined with a Halbach array and equipped with a transducer, thereby increasing the magnetization efficiency of the filter material. This invention can produce filter material that efficiently captures and purifies fine welding fumes, effectively improving the working environment and protecting worker health.

Description

Technical Field

[0001] The invention belongs to the technical field of dust prevention and control, and particularly relates to a method for preparing a fine particle high-efficiency purification composite magnetic filter material. Background Art

[0002] Welding is one of the most important materials forming and processing technologies in modern manufacturing. It is widely used in the manufacture of structural components in the petrochemical industry, engineering machinery, electric power, aerospace, and marine engineering, as well as in industries such as microelectronics and sensors. Welding fume contains a variety of harmful substances, and long-term inhalation can lead to occupational diseases such as welder silicosis, manganese poisoning, and photoelectric ophthalmia. Therefore, the development of welding fume filtration technology is of great significance for protecting worker health and improving the working environment.

[0003] Welding fume filtration technologies primarily include source capture and filtration, integrated fume treatment, and integrated ventilation. Source capture and filtration uses a fume hood to collect welding fumes into a main unit indoors or outdoors, where they are filtered and discharged after meeting standards. Integrated fume treatment uses an air purification device within the workshop to filter and purify the fumes before discharging them directly into the workshop. Integrated ventilation uses a ventilation system to collect and purify the fume in the workshop before discharging it and replenishing it with fresh air.

[0004] Welding fume is primarily formed by the volatilization, oxidation, and condensation of compounds from welding rods, wires, their coatings, the metal being welded, and their surface treatments at high temperatures. This fume contains numerous harmful substances, such as MnO₂, Fe₂O₃, and SiO₂. These particles, with particle sizes as small as a dozen nanometers, have strong diffusion and penetration abilities, making them difficult to capture. Therefore, achieving efficient control of fine welding fume has become an international technological challenge. Therefore, conducting fundamental research on the efficient purification of fine welding fume is particularly important. For example, the comparative document with announcement number CN108071020B discloses a filter bag for filtering and recovering non-ferrous metal dust and a preparation method thereof, wherein the adsorption layer is a mixture obtained by blending magnetic nano-iron oxide, polytetrafluoroethylene dispersion emulsion, and dispersant emulsion and then curing the mixture, and the mixture is loaded onto a microporous composite filter material by spraying or dipping; on the one hand, the process only has a single iron oxide, which has low magnetism and cannot effectively intercept fine particles, and at the same time cannot improve the antioxidant and corrosion resistance of the filter material; on the other hand, the use of iron oxide for mixed curing and spraying increases the dust removal resistance of the filter material, reduces its dust holding effect, and shortens the life of the filter material. Summary of the Invention

[0005] The purpose of the present invention is to provide a method for preparing a fine particle high-efficiency purification composite magnetic filter material, which can prepare a filter material that can efficiently capture and purify tiny welding smoke, effectively improve the working environment and protect workers' health.

[0006] To achieve the above object, the present invention provides a method for preparing a fine particle high-efficiency purification composite magnetic filter material, comprising the following steps:

[0007] Step 1: Fix the metal mesh on the workbench of the multi-axial warp knitting machine to ensure that it is flat and stable, and weave the organic fiber into the metal mesh through the mesh holes to form a composite metal mesh filter material;

[0008] Step 2: Use the thread stitching technology to needle-punch the composite metal mesh filter material onto the glass fiber filter material, and perform heat setting treatment at 220°C to fix the structure. After heat setting, perform full saturation impregnation treatment and use silane coupling agent to enhance the bonding force between fibers to form a composite glass fiber filter material;

[0009] Step 3: Use melt-blown equipment to evenly load PTFE onto the carbon fiber filter material, and then use a hot rolling mill to hot-press the carbon fiber filter material and PTFE. The temperature is controlled between 160 and 230 ° C and the pressure is 1 to 3 kg / cm 2 After the coating is completed, curing treatment is carried out to ensure that the PTFE film and the carbon fiber filter material are firmly combined to form a composite carbon fiber filter material;

[0010] Step 4: Mix the acrylic polymer film-forming agent, water-based epoxy paint resin and PTFE emulsion and stir them at low speed with an electric stirrer. Add sodium lauryl sulfate, hydroxyethyl cellulose and hydroxypropyl methylcellulose to deionized water and stir to dissolve the solids. Then add the solution to the mixed emulsion and slowly pour it in while stirring with a glass rod. Finally, add the prepared coating agent to the mixed magnetic particles and stir them at 500 rpm with an electric stirrer for 15 minutes. Then, foam them with a porous foamer.

[0011] Step 5: Use a scraper coating machine to evenly coat the foam-rich PTFE foaming solution between the composite glass fiber filter material and the composite carbon fiber filter material. The distance between the scraper blade and the filter material is 2 mm to ensure that the thickness of the PTFE foaming solution on the filter material surface is not more than 2 mm. Use a glue coating machine to press and remove excess coating liquid between the filter materials. Then, perform low-temperature drying and high-temperature sintering. Use a high-temperature hot press to hot-press and laminate at a hot-pressing temperature of 220-240°C, a hot-pressing time of 7-10 seconds, and a hot-pressing pressure of 1-2 MPa to form a composite magnetic filter material.

[0012] Step 6: Use a magnetizing device to magnetize the composite magnetic filter material. The magnetizing machine transmission speed is 0.8m / s.

[0013] As a further solution of the present invention: the material of the metal mesh used in step 1 is a high-carbon steel metal mesh with strong magnetism and remanence. First, the impurities on the surface of the metal mesh are dissolved with an organic solvent, and then an oxide film is formed by chemical oxidation to improve its corrosion resistance and wear resistance.

[0014] As a further solution of the present invention, the cleaned metal mesh is immersed in a concentrated sodium hydroxide solution and oxidized at a high temperature of 130 to 145°C, and then the workpiece is cleaned to remove surface residues; the metal mesh is soaked in a soapy water solution at 80 to 100°C to form a layer of iron stearate film to improve corrosion resistance, and the concentration of the saponification solution is 30 to 50 g / L; finally, it is boiled and washed with hot water to further solidify the film layer.

[0015] As a further solution of the present invention: in step 1, the organic fiber is aromatic sulfone fiber, and when the aromatic sulfone fiber is nested and woven with the metal mesh, a fiber weaving knot is left at the mesh position of the metal mesh.

[0016] As a further solution of the present invention: Step 4: the mixed magnetic particles include neodymium iron boron particles, aluminum nickel cobalt particles, and barium ferrite particles, and are mixed in a ratio of 7:2:1.

[0017] As a further solution of the present invention: the magnetic device includes a fixed bracket, the fixed bracket is connected to a transmission mechanism and a magnetizing mechanism, the magnetizing mechanism is distributed above and below the transmission mechanism, and the fixed bracket is connected to a heat dissipation system for dissipating heat for the magnetizing mechanism;

[0018] The fixed bracket is connected to the inlet and outlet ends of the magnetizing mechanism with clamping wheels respectively, and the fixed bracket is connected to the middle area of ​​the magnetizing mechanism with a pressing wheel;

[0019] A detection device for detecting the transmission speed and magnetic strength of the composite magnetic filter material is connected to the outlet end of the magnetizing mechanism on the fixed bracket;

[0020] A material receiving device is provided at the end of the conveying mechanism on the fixed bracket;

[0021] A control box for connecting and controlling a transmission mechanism, a magnetizing mechanism, a heat dissipation system, a detection device and a material receiving device is arranged on the fixed bracket.

[0022] As a further solution of the present invention: the conveying mechanism includes multiple groups of rollers evenly connected and distributed, and a corresponding magnetizing mechanism provides a vibration transducer for the composite magnetic filter material. A feed roller is provided at the front end of the conveying mechanism, and a motor for driving the feed roller to rotate is provided on the fixed bracket.

[0023] As a further solution of the present invention: the heat dissipation system includes a water-cooled heat sink, a water tank and a blower, the water-cooled heat sink and the water tank are connected by a circulating water pipe, and the circulating water pipe is connected to a water pump;

[0024] The water-cooled heat sink is divided into an air flow area and a water flow area by an air duct. The air duct is provided with an atomizing nozzle connected to the water flow area; the water flow area is provided with a water pipe interface connected to the circulating water pipe, and the air flow area is connected to an air interface for connecting a blower through a guide plate.

[0025] As a further solution of the present invention: the material receiving device includes a movable bracket and a material receiving roller connected to the movable bracket, the fixed bracket is connected to an adjusting rod through a hydraulic cylinder, one end of the adjusting rod is hinged to the fixed bracket, and the other end is connected to a pressure roller.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. The present invention utilizes aromatic sulfone fibers to be nested and woven into a carbon steel metal mesh that has been oxidized with a sodium hydroxide solution. At the same time, fiber knots are left at the mesh positions of the metal mesh. Due to the fiber toughness and the influence of wind force during filtration and cleaning, the knots can move inside and outside the metal mesh. During the cleaning function, the dust initial layer can be formed more quickly, the filtration accuracy is high, and the dust volume is high. The cleaning pressure required during the cleaning process is small, and the cleaning is more thorough under the same cleaning conditions.

[0028] 2. The present invention utilizes an acrylic polymer film-forming agent, a water-based epoxy paint resin, and a PTFE emulsion to form a foaming layer as a support layer for magnetic particles, while also protecting the mesh of the filter material and magnetizing the filter material. The external metal mesh acts as a primary magnetic filter, and the foaming layer of mixed magnetic particles acts as a secondary magnetic filter. This effectively solves the current problem of welding fume particles being small in size, having strong diffusion and penetration abilities, and being difficult to capture, and is of great significance for protecting worker health and improving the working environment.

[0029] 3. The magnetizing device used in the present invention is simple in design and easy to operate. It can be used directly after the filter material is formed, effectively improving work efficiency.

[0030] 4. The heat dissipation system of the present invention adopts water cooling and water evaporation to absorb heat simultaneously to dissipate heat. The rapid flow of the blower in the air duct accelerates evaporation and more effectively handles the heat generated by high-power hardware. The water in the heat dissipation system can act as a buffer, filtering out some environmental fluctuations, thereby making the unit run more smoothly, while evaporative cooling can cope with direct environmental fluctuations, improving the safety and stability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 Schematic diagram of the structure of the magnetizing device in the present invention;

[0032] Figure 2 It is a structural schematic diagram of the transmission mechanism in the present invention;

[0033] Figure 3 Schematic diagram of the cross-sectional structure of the magnetizing device in the present invention;

[0034] Figure 4 Schematic diagram of the structure of the electromagnet in the present invention;

[0035] Figure 5 Schematic diagram of the structure of the detection device of the present invention;

[0036] Figure 6 Schematic diagram of the structure of the pressing wheel in the present invention;

[0037] Figure 7 Schematic diagram of the structure of the heat dissipation system of the present invention;

[0038] Figure 8 Schematic diagram of the structure of the composite metal mesh filter material in the present invention;

[0039] Figure 9 It is a side view structural schematic diagram of the composite metal mesh filter material in the present invention.

[0040] In the figure: 1, conveying mechanism, 11, motor, 12, feed roller, 13, roller, 14, transducer;

[0041] 2. Clamping mechanism, 21. Clamping wheel, 22. Pressing wheel, 221. Spring, 222. Telescopic rod, 223. Rubber wheel;

[0042] 3. magnetizing mechanism, 31. electromagnet, 32. permanent magnet, 311. copper wire, 312. silicon steel sheet;

[0043] 4. Cooling system, 41. Water cooling radiator, 42. Water tank, 43. Water pump, 44. Blower, 411. Atomizing nozzle, 412. Air duct, 413. Guide plate, 414. Air interface, 415. Water pipe interface;

[0044] 5. Control box;

[0045] 6. Detection device, 61. Detector, 611. Metal probe, 612. Detection rubber wheel;

[0046] 7. Receiving device, 71. Pressing roller, 72. Hydraulic rod, 73. Receiving roller, 74. Moving bracket;

[0047] 8. Fix the bracket;

[0048] 9. Composite metal mesh filter material, 91. Metal mesh, 92. Braided knot, 93. Aromatic sulfone fiber. DETAILED DESCRIPTION

[0049] The present invention will be further described below by way of examples.

[0050] A method for preparing a fine particle high-efficiency purification composite magnetic filter material comprises the following steps:

[0051] Step 1: Fix the metal mesh 91 on the workbench of the multi-axial warp knitting machine to ensure that it is flat and stable, and weave the organic fibers through the mesh of the metal mesh 91 to form a composite metal mesh filter material 9, such as Figure 8 As shown;

[0052] Step 2: Use the thread stitching technology to needle the composite metal mesh filter material 9 onto the glass fiber filter material, and perform heat setting treatment at 220°C to fix the structure. After heat setting, perform full saturation impregnation treatment and use silane coupling agent to enhance the bonding force between fibers to form a composite glass fiber filter material;

[0053] Step 3: Use melt-blown equipment to evenly load PTFE onto the carbon fiber filter material, and then use a hot rolling mill to hot-press the carbon fiber filter material and PTFE. The temperature is controlled between 160 and 230 ° C and the pressure is 1 to 3 kg / cm 2 After the coating is completed, curing treatment is carried out to ensure that the PTFE film and the carbon fiber filter material are firmly combined to form a composite carbon fiber filter material;

[0054] Step 4: Mix the acrylic polymer film-forming agent, water-based epoxy paint resin and PTFE emulsion and stir them at low speed with an electric stirrer. Add sodium lauryl sulfate, hydroxyethyl cellulose and hydroxypropyl methylcellulose to deionized water and stir to dissolve the solids. Then add the solution to the mixed emulsion and slowly pour it in while stirring with a glass rod. Finally, add the prepared coating agent to the mixed magnetic particles and stir them at 500 rpm with an electric stirrer for 15 minutes. Then, foam them with a porous foamer.

[0055] Step 5: Use a scraper coating machine to evenly coat the foam-rich PTFE foaming solution between the composite glass fiber filter material and the composite carbon fiber filter material. The distance between the scraper blade and the filter material is 2 mm to ensure that the thickness of the PTFE foaming solution on the filter material surface is not more than 2 mm. Use a glue coating machine to press and remove excess coating liquid between the filter materials. Then, perform low-temperature drying and high-temperature sintering. Use a high-temperature hot press to hot-press and laminate at a hot-pressing temperature of 220-240°C, a hot-pressing time of 7-10 seconds, and a hot-pressing pressure of 1-2 MPa to form a composite magnetic filter material.

[0056] Step 6: Use a magnetizing device to magnetize the composite magnetic filter material. The magnetizing machine transmission speed is 0.8m / s.

[0057] Furthermore, the material of the metal mesh 91 used in step 1 is a high-carbon steel metal mesh 91 with strong magnetism and remanence. First, an organic solvent is used to dissolve impurities on the surface of the metal mesh 91, and then an oxide film is formed by chemical oxidation to improve its corrosion resistance and wear resistance.

[0058] Specifically, the cleaned metal mesh 91 is immersed in a concentrated sodium hydroxide solution and oxidized at a high temperature of 130-145°C. The workpiece is then cleaned to remove surface residues. The metal mesh 91 is immersed in a soapy water solution at 80-100°C to form a layer of iron stearate film to improve corrosion resistance. The concentration of the saponified solution is 30-50g / L. Finally, it is boiled in hot water to further solidify the film layer.

[0059] Furthermore, in step 1, the organic fiber is an aromatic sulfone fiber 93, and when the aromatic sulfone fiber 93 is nested and woven with the metal mesh 91, a fiber weaving knot 92 is left at the mesh position of the metal mesh 91, such as Figure 9 shown.

[0060] Furthermore, in step four, the mixed magnetic particles include neodymium iron boron particles, aluminum nickel cobalt particles, and barium ferrite particles, and are mixed in a ratio of 7:2:1.

[0061] In order to realize the magnetization of composite magnetic filter material, further, such as Figures 1 to 3 As shown, the magnetic device includes a fixed bracket 8, to which a conveying mechanism 1 and a magnetizing mechanism 3 are connected. The magnetizing mechanisms 3 are distributed above and below the conveying mechanism 1. The fixed bracket 8 is connected to a heat dissipation system 4 for dissipating heat for the magnetizing mechanism 3.

[0062] The fixed bracket 8 is connected to the inlet and outlet ends of the magnetizing mechanism 3 with clamping wheels 21 respectively, and the fixed bracket 8 is connected to the middle area of ​​the magnetizing mechanism 3 with a pressing wheel 22; the clamping wheel 21 cooperates with the pressing wheel 22 to form the clamping mechanism 2, such as Figure 6 As shown, the pressing wheel 22 includes a telescopic rod 222 connected to the fixed bracket 8, the end of the telescopic rod 222 is connected to a rubber wheel 223, and a spring 221 is sleeved on the telescopic rod 222. The elastic potential energy is used to maintain the rubber wheel 223 pressing the filter material and reduce the wear of the rubber wheel 223 caused by vibration.

[0063] A detection device 6 for detecting the transmission speed and magnetic strength of the composite magnetic filter material is connected to the outlet end of the magnetizing mechanism 3 on the fixed bracket 8;

[0064] The detection device 6 is located on the filter material at the outlet of the magnetizing mechanism 3 and includes a detector 61 for detecting the speed and magnetic strength of the composite magnetic filter material. The detection is performed after the filter material passes through the magnetizing area. The detector 61 measures the magnetic strength of the filter material surface through a metal probe 611. The filter material speed is measured through the detection rubber wheels 612 connected to the two ends of the detector 61 and the filter material. In this way, the magnetization time and magnetization strength are adjusted to ensure a better magnetization effect.

[0065] A material receiving device 7 is provided on the fixed bracket 8 at the end of the conveying mechanism 1;

[0066] A control box 5 for connecting and controlling the conveying mechanism 1 , the magnetizing mechanism 3 , the heat dissipation system 4 , the detection device 6 and the material receiving device 7 is provided on the fixed bracket 8 .

[0067] Further, such as Figure 2 As shown, the conveying mechanism 1 includes multiple sets of rollers 13 evenly connected and distributed, and a corresponding transducer 14 for providing vibration to the composite magnetic filter material by the magnetizing mechanism 3. The front end of the conveying mechanism 1 is provided with a feed roller 12, and a motor 11 for driving the feed roller 12 is provided on the fixed bracket 8. The rollers 13 can reduce the friction resistance of the filter material during the conveying process; Figure 3 As shown, the magnetizing mechanism 3 has electromagnets 31 and permanent magnets 32 arranged in a combination of radial arrays and tangential arrays to form a Halbach array. The Halbach array strengthens the magnetic field and the transducer 14 provides vibration to the filter material to enhance the magnetization effect of the filter material.

[0068] like Figure 4 As shown, the core material of the electromagnet 31 is made of stacked silicon steel sheets 312 to ensure efficient conduction of magnetic flux and at the same time weaken the eddy current effect generated when power is applied to reduce the thermal effect. The copper wire 311 is wound around the core in a spiral shape along the stacking direction of the silicon steel sheets 312.

[0069] Furthermore, the heat dissipation system 4 includes a water-cooled heat sink 41, a water tank 42 and a blower 44. The water-cooled heat sink 41 and the water tank 42 are connected by a circulating water pipe, and a water pump 43 is connected to the circulating water pipe.

[0070] The water-cooled heat sink 41 is divided into an air flow area and a water flow area by an air duct 412. The air duct 412 is provided with an atomizing nozzle 411 connected to the water flow area; the water flow area is provided with a water pipe interface 415 connected to the circulating water pipe, and the air flow area is connected to an air interface 414 for connecting to the blower 44 through a guide plate 413.

[0071] The cross-section of the air duct 412 is a fan-shaped with an angle of 25° to 30°. The atomizing nozzle 411 is arranged at the position of the angle. During use, the pressure of the water pump 43 will spray water mist through the atomizing nozzle 411 to moisten the inner wall of the air duct 412. The blower 44 pushes the air to circulate in the air duct 412, thereby accelerating the evaporation of water on the inner wall of the air duct 412, thereby taking away heat. The combination of water cooling and water vapor evaporation ensures the heat dissipation effect of the magnetizing mechanism 3.

[0072] Furthermore, the receiving device 7 includes a movable bracket 74 and a receiving roller 73 connected to the movable bracket 74. The fixed bracket 8 is connected to an adjusting rod through a hydraulic rod 72. One end of the adjusting rod is hinged to the fixed bracket 8, and the other end is connected to a pressure roller 71.

[0073] The pressure between the pressing roller 71 and the receiving roller 73 can be adjusted and controlled by the hydraulic rod 72, which can be achieved through pressure sensing, thereby ensuring that the magnetized filter material can be tightly rolled.

Claims

1. A method for preparing a fine particle high-efficiency purification composite magnetic filter material, characterized in that: The following steps are involved: Step 1: Fix the metal mesh (91) on the workbench of the multi-axial warp knitting machine to ensure that it is flat and stable, and weave the organic fibers onto the metal mesh (91) through the mesh holes of the metal mesh (91) to form a composite metal mesh filter material (9); Step 2: using a thread suture technique to needle-punch the composite metal mesh filter material (9) onto the glass fiber filter material, and heat-setting the material at 220° C. to fix the structure, and then performing a full saturation impregnation treatment after heat setting, using a silane coupling agent to enhance the bonding force between the fibers to form a composite glass fiber filter material; Step 3: Use melt-blown equipment to evenly load PTFE onto the carbon fiber filter material, and then use a hot rolling mill to hot-press the carbon fiber filter material and PTFE. The temperature is controlled between 160 and 230 ° C and the pressure is 1 to 3 kg / cm 2 After the coating is completed, curing treatment is carried out to ensure that the PTFE film and the carbon fiber filter material are firmly combined to form a composite carbon fiber filter material; Step 4: Mix the acrylic polymer film-forming agent, water-based epoxy paint resin and PTFE emulsion and stir them at low speed with an electric stirrer. Add sodium lauryl sulfate, hydroxyethyl cellulose and hydroxypropyl methylcellulose to deionized water and stir to dissolve the solids. Then add the solution to the mixed emulsion and slowly pour it in while stirring with a glass rod. Finally, add the prepared coating agent to the mixed magnetic particles and stir them at 500 rpm with an electric stirrer for 15 minutes. Then, foam them with a porous foamer. Step 5: Use a scraper coating machine to evenly coat the foam-rich PTFE foaming solution between the composite glass fiber filter material and the composite carbon fiber filter material. The distance between the scraper blade and the filter material is 2 mm to ensure that the thickness of the PTFE foaming solution on the filter material surface is not more than 2 mm. Use a glue coating machine to press and remove excess coating liquid between the filter materials. Then, perform low-temperature drying and high-temperature sintering. Use a high-temperature hot press to hot-press and laminate at a hot-pressing temperature of 220-240°C, a hot-pressing time of 7-10 seconds, and a hot-pressing pressure of 1-2 MPa to form a composite magnetic filter material. Step 6: Use a magnetizing device to magnetize the composite magnetic filter material. The magnetizing machine transmission speed is 0.8m / s.

2. The method for preparing a fine particle high-efficiency purification composite magnetic filter material according to claim 1, characterized in that: The metal mesh (91) used in step 1 is made of a high-carbon steel metal mesh (91) with strong magnetism and remanence. First, an organic solvent is used to dissolve impurities on the surface of the metal mesh (91), and then an oxide film is formed by chemical oxidation to improve its corrosion resistance and wear resistance.

3. The method for preparing a fine particle high-efficiency purification composite magnetic filter material according to claim 2, characterized in that: The cleaned metal mesh (91) is immersed in a concentrated sodium hydroxide solution and oxidized at a high temperature of 130 to 145° C., and then the workpiece is cleaned to remove surface residues; the metal mesh (91) is soaked in a soapy water solution at 80 to 100° C. to form a layer of iron stearate film to improve corrosion resistance, and the concentration of the saponification solution is 30 to 50 g / L; finally, hot water boiling is performed to further solidify the film layer.

4. The method for preparing a fine particle high-efficiency purification composite magnetic filter material according to any one of claims 1 to 3, characterized in that: In step 1, the organic fiber is a sulfone aryl fiber (93). When the sulfone aryl fiber (93) and the metal mesh (91) are nested and woven, a fiber weaving knot (92) is left at the mesh position of the metal mesh (91).

5. The method for preparing a fine particle high-efficiency purification composite magnetic filter material according to claim 1, characterized in that: Step 4: Mixing magnetic particles including neodymium iron boron particles, aluminum nickel cobalt particles, and barium ferrite particles, and mixing them in a ratio of 7:2:

1.

6. The method for preparing a fine particle high-efficiency purification composite magnetic filter material according to claim 1, characterized in that: The magnetic device comprises a fixed bracket (8), a transmission mechanism (1) and a magnetizing mechanism (3) are connected to the fixed bracket (8), the magnetizing mechanism (3) is distributed above and below the transmission mechanism (1), and a heat dissipation system (4) for dissipating heat from the magnetizing mechanism (3) is connected to the fixed bracket (8); The fixed bracket (8) is connected to the inlet and outlet ends of the magnetizing mechanism (3) with clamping wheels (21) respectively, and the fixed bracket (8) is connected to the middle area of ​​the magnetizing mechanism (3) with a pressing wheel (22); A detection device (6) for detecting the transmission speed and magnetic strength of the composite magnetic filter material is connected to the outlet end of the magnetizing mechanism (3) on the fixed bracket (8); A material receiving device (7) is provided on the fixed bracket (8) at the end of the conveying mechanism (1); A control box (5) for connecting and controlling a conveying mechanism (1), a magnetizing mechanism (3), a heat dissipation system (4), a detection device (6) and a material receiving device (7) is provided on the fixed bracket (8).

7. The method for preparing a fine particle high-efficiency purification composite magnetic filter material according to claim 6, characterized in that: The conveying mechanism (1) comprises a plurality of rollers (13) uniformly connected and distributed, and a vibrating transducer (14) corresponding to the magnetizing mechanism (3) for providing the composite magnetic filter material. A feed roller (12) is provided at the front end of the conveying mechanism (1), and a motor (11) for driving the feed roller (12) to rotate is provided on the fixed bracket (8).

8. The method for preparing a fine particle high-efficiency purification composite magnetic filter material according to claim 6, characterized in that: The heat dissipation system (4) includes a water-cooled heat sink (41), a water tank (42) and a blower (44). The water-cooled heat sink (41) and the water tank (42) are connected via a circulating water pipe, and a water pump (43) is connected to the circulating water pipe. The water-cooled heat sink (41) is divided into an air flow area and a water flow area by an air duct (412). The air duct (412) is provided with an atomizing nozzle (411) connected to the water flow area; the water flow area is provided with a water pipe interface (415) connected to a circulating water pipe, and the air flow area is connected to an air interface (414) for connecting to a blower (44) through a guide plate (413).

9. The method for preparing a fine particle high-efficiency purification composite magnetic filter material according to claim 6, characterized in that: The receiving device (7) comprises a movable bracket (74) and a receiving roller (73) connected to the movable bracket (74); an adjusting rod is connected to the fixed bracket (8) via a hydraulic rod (72); one end of the adjusting rod is hinged to the fixed bracket (8), and the other end is connected to a pressing roller (71).

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