CN111921611B - Waste treatment process for magnet machining - Google Patents
Waste treatment process for magnet machining Download PDFInfo
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- CN111921611B CN111921611B CN202010934916.XA CN202010934916A CN111921611B CN 111921611 B CN111921611 B CN 111921611B CN 202010934916 A CN202010934916 A CN 202010934916A CN 111921611 B CN111921611 B CN 111921611B
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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
- B02C4/00—Crushing or disintegrating by roller mills
- B02C4/02—Crushing or disintegrating by roller mills with two or more rollers
- B02C4/08—Crushing or disintegrating by roller mills with two or more rollers with co-operating corrugated or toothed crushing-rollers
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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
- B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
- B02C15/04—Mills with pressed pendularly-mounted rollers, e.g. spring pressed
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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
- B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
- B02C23/24—Passing gas through crushing or disintegrating zone
- B02C23/32—Passing gas through crushing or disintegrating zone with return of oversize material to crushing or disintegrating zone
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/08—Cleaning involving contact with liquid the liquid having chemical or dissolving effect
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
- B08B3/12—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration by sonic or ultrasonic vibrations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/12—Both compacting and sintering
- B22F3/16—Both compacting and sintering in successive or repeated steps
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
- H01F1/047—Alloys characterised by their composition
- H01F1/053—Alloys characterised by their composition containing rare earth metals
- H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
- H01F1/057—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
- B22F2009/045—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling by other means than ball or jet milling
- B22F2009/047—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling by other means than ball or jet milling by rolling
Abstract
The invention discloses a waste treatment process for magnet processing, which specifically comprises the following steps: step S1, waste pretreatment; step S2, grinding into powder; step S3, forming a magnetic field; step S4, vacuum sintering; the magnet crushing and grinding equipment used in the step S2 comprises a powder grinding device, an air pump, a base, a speed reducer, a coupler, a main motor, a discharging pipe and a storage box, wherein the air pump is arranged on one side of the base, the speed reducer is arranged in the center of the base, the main motor is arranged on one side, away from the air pump, of the base, the coupler is arranged between the main motor and the speed reducer, one end of the coupler is fixedly connected with an input shaft of the speed reducer, the other end of the coupler is fixedly connected with the output end of the main motor, the powder grinding device is installed above the base, the discharging pipe is arranged between the powder grinding device and the storage box, and the storage box is filled with nitrogen; the invention solves the problem of low recovery rate of the magnet waste and the problem that the magnet waste can not be directly processed into magnet powder in the process of milling the magnet waste.
Description
Technical Field
The invention belongs to the technical field of magnet waste treatment, and particularly relates to a waste treatment process for magnet processing.
Background
The neodymium iron boron magnet is large in brittleness, a lot of waste materials can be generated in the production and processing process, the neodymium iron boron magnet is a relatively expensive material, the production cost of a large amount of waste materials can be greatly increased, meanwhile, the waste materials can also cause pollution, the rare earth material is a non-renewable resource, and the neodymium iron boron magnet is certainly and fully utilized from the viewpoints of improving the economic effect, protecting the environment and saving resources.
At present, there are many methods for recycling the waste neodymium iron boron magnet, such as: 1. re-smelting the waste material, and re-sintering through a series of processes to obtain a new neodymium iron boron magnet; 2. crushing the waste material with hydrogen, measuring the components of the waste material, adding neodymium iron boron powder with the same components, mixing, and performing jet milling, pressing and sintering to obtain a new neodymium iron boron magnet; 3. rare metals and other precious metals are extracted from the waste. The three methods can achieve the purpose of recycling the neodymium iron boron magnet waste to a certain extent, but the recovery rate is not high, and the performance of the obtained new neodymium iron boron magnet is also reduced.
In carrying out the powder process treatment process to the magnet waste material, need carry out the pre-crushing through machining with the magnet waste material of blocking earlier, pass through the hydrogen explosion breakage with the waste material again, make the magnet powder through the jet mill at last, the process of whole powder process is complicated, complex operation, can not directly process into the magnet powder with the magnet waste material of blocking for magnet waste material treatment effeciency is low.
The Chinese utility model with the patent publication number of CN207641569U discloses a crusher for producing neodymium iron boron magnets, which comprises a bracket, a shell, a feed inlet, an upper cover, a leather ring, a crushing chamber, slots, a baffle plate, a rotating roller, a hammer, a side door, a cushion layer, an air hole, a bearing box, a discharge port, a water pipe and a motor, wherein the upper cover is arranged at the upper part of the shell; the leather ring is arranged on the lower surface of the upper cover; the crushing chamber is arranged in the shell; the slot is arranged in the middle of the inner wall of the crushing chamber; the baffle is inserted into the slot; the roller is arranged in the middle of the crushing chamber; the hammer sheet is arranged on the rotary roller; the side door is arranged on the side surface of the shell; the cushion layer is arranged on the side door; the air holes are arranged on the side door; the water pipe is arranged on the shell. This breaker simple structure can carry out the breakage to the ingot casting in the protect state, and can cool off, safe in utilization, and efficient guarantees crushing quality, nevertheless exists and can't grind the powder process with the magnet after the breakage, and can not effectively protect the magnet after the breakage, makes the magnet material by the oxidation at water-cooling in-process.
Disclosure of Invention
The invention aims to provide a waste treatment process for magnet processing, which solves the problems that the recovery rate of magnet waste is not high and the performance of the obtained new neodymium iron boron magnet is reduced in the prior art; meanwhile, the problems that the process is complex and the operation is complex in the process of milling the magnet waste, and the magnet waste cannot be directly processed into magnet powder, so that the treatment efficiency of the magnet waste is low are solved.
The purpose of the invention can be realized by the following technical scheme:
a waste treatment process for magnet processing specifically comprises the following steps:
step S1, waste pretreatment: taking the magnet waste, putting the magnet waste into an ultrasonic cleaning pool, adding a detergent aqueous solution into the ultrasonic cleaning pool, wherein the volume ratio of the magnet waste to the detergent aqueous solution is 1:2, and then carrying out ultrasonic cleaning for 15-20 min; washing the magnet waste material subjected to ultrasonic cleaning with clear water for 3-5min, then placing the magnet waste material into an oven, setting the oven at 200 ℃ for 100-;
step S2, grinding into powder: adding the magnet waste processed in the step S1 into a feed hopper of a magnet crushing and grinding device, starting an air pump, filling inert gas into a grinding device, enabling the magnet waste to enter between a driving roller and a driven roller through a feed pipe, starting a crushing motor to drive the driving roller and the driven roller to rotate in opposite directions, crushing the magnet waste into particles and dropping the particles into a crushing hopper, enabling the magnet particles to drop onto a grinding disc seat from a dropping port, starting a main motor to rotate a grinding disc mechanism, extending a hydraulic oil cylinder to enable the grinding roller to approach a grinding ring, grinding the magnet particles into powder, blowing up the magnet powder by the inert gas at the edge of the grinding disc seat, enabling the magnet powder to reach a separator, screening by blades, blowing out the magnet powder with the particle size of 3.5-5 mu m from an air outlet pipe, entering a storage box through a discharge pipe to be collected, adding a lubricant into the magnet powder in the storage box and uniformly mixing, the addition amount of the lubricant is 0.02 percent of the mass of the magnet powder;
step S3, magnetic field forming: adding the magnet powder crushed and mixed in the step S2 into a die of a forming press, and under the protection of inert gas, using a pulse magnetic field of 2.0-3.5T and the pressure of 200-220MPa to carry out orientation and press forming to prepare a magnet green compact;
step S4, vacuum sintering: and placing the magnet green compact in a vacuum sintering furnace with the temperature set to be 1000-1100 ℃, sintering for 3-5h, quenching to room temperature by using inert gas, then heating to be 880-950 ℃, preserving heat for 2-3h, quenching to be room temperature by using inert gas, then heating to be 500-620 ℃, preserving heat for 2-3.5h, and quenching to be room temperature by using inert gas, thus obtaining the finished magnet.
Further, the detergent aqueous solution is a 40% sodium carbonate aqueous solution or a 35% trisodium phosphate aqueous solution in mass fraction, and the detergent aqueous solution temperature is 40 ℃.
Further, the lubricant is one or a mixture of more of fatty alcohol-polyoxyethylene ether, glyceryl oleate and sodium dodecyl sulfate in any proportion.
Further, the inert gas is nitrogen or argon.
The magnet crushing and grinding equipment comprises a powder grinding device, an air pump, a base, a speed reducer, a coupler, a main motor, a discharging pipe and a storage box, wherein the base is annular, the air pump is arranged on one side of the base, the speed reducer is arranged in the center of the base, the main motor is arranged on one side, away from the air pump, of the base, the coupler is arranged between the main motor and the speed reducer, one end of the coupler is fixedly connected with an input shaft of the speed reducer, the other end of the coupler is fixedly connected with the output end of the main motor, the powder grinding device is arranged above the base, the discharging pipe is arranged between the powder grinding device and the storage box, and the storage box is filled with nitrogen;
the grinding device comprises an upper shell, a feeding pipe, a lower shell, a top plate, a bottom plate, a grinding roller mechanism and a grinding disc mechanism, wherein the lower surface of the bottom plate is fixedly connected with a base, an air inlet pipe is arranged on one side below the bottom plate and fixedly connected with the bottom plate, one end of the air inlet pipe penetrates through the bottom plate, the other end of the air inlet pipe is communicated with an air pump output end, an air pump input end is communicated with an inert gas compression tank, a sheath is arranged between the base and a speed reducer, the top end of the sheath is fixedly connected with the lower surface of the bottom plate, the lower shell is fixedly arranged on the upper surface of the bottom plate, the grinding disc mechanism is arranged in the center of the inner part of the lower shell, a plurality of uniformly distributed installation boxes are arranged on the side wall of the lower shell, the installation boxes are fixedly arranged on the side wall of the lower shell, the installation boxes are communicated with the inner part of the lower shell, the grinding roller mechanism is arranged in the installation boxes, the top end of the lower shell is provided with the top plate, the lower surface of the top plate is fixedly connected with the lower shell, a through hole is formed in the center of the top plate, the diameter of the through hole is the same as the inner diameter of the lower shell, an upper shell is arranged above the top plate, and the bottom end of the upper shell is fixedly connected with the upper surface of the top plate;
the center of the top end of the upper shell is provided with a feed pipe, the feed pipe is fixedly connected with the upper shell, a feed hopper is arranged above the feed pipe, one end of the feed pipe penetrates through the upper shell, the other end of the feed pipe is fixed with the bottom end of the feed hopper, the feed pipe is communicated with the interior of the feed hopper, one side of the top end of the upper shell is fixed with a crushing motor, the output end of the crushing motor is fixedly provided with a driving belt wheel, one side of the top end of the upper shell, which is far away from the crushing motor, is provided with an air outlet pipe, the bottom end of the air outlet pipe is fixedly connected with the upper shell, the air outlet pipe is communicated with the interior of the upper shell, the top end of the air outlet pipe is fixedly communicated with one end of a discharge pipe, the other end of the discharge pipe is communicated with a storage box, a separator is arranged in the upper shell, the top end of the separator is fixedly connected with the upper surface of the interior of the upper shell, a protective cover is fixedly connected with the upper surface of the interior of the upper shell, and the bottom end of the feed pipe is fixedly connected with the feed pipe, go up the inside garrulous hopper that is equipped with of casing, garrulous hopper top and separator bottom end fixed connection, garrulous hopper bottom is equipped with the blanking mouth, and the blanking mouth is located inside the lower casing.
Further, inside driving shaft and the driven shaft of being equipped with of garrulous hopper, driving shaft and driven shaft symmetry set up, the crushed aggregates fill lateral wall all runs through at driving shaft and driven shaft both ends, driving shaft and driven shaft rotate with the crushed aggregates fill and are connected, the upper casing is all run through at driving shaft and driven shaft both ends, driving shaft and driven shaft rotate with the upper casing and be connected, the installation is fixed with the drive roll on the driving shaft, the installation is fixed with the driven voller on the driven shaft, drive roll and driven voller all are located inside the crushed aggregates fill, drive roll and driven voller surface are equipped with a plurality of evenly distributed's bur, drive roll and driven voller mutually support, driven pulley is installed to the one end of driving shaft, driven pulley passes through belt transmission with the drive pulley, be equipped with the driving gear between driven pulley and the upper casing, the driving gear installation is fixed on the driving shaft, the one end installation of driven shaft is fixed with driven gear, the driving gear meshes with driven gear mutually.
Further, a slide rod seat is fixedly arranged above the side wall of the installation box, a slide rod is arranged in the slide rod seat and is connected with the slide rod seat in a sliding manner, a hydraulic oil cylinder is arranged below the slide rod seat, a hydraulic oil cylinder body is fixedly connected with the side wall of the installation box, the grinding roller mechanism comprises a shaft support, a slide rod mounting groove is formed in the top end of the shaft support, one end of the slide rod is matched with the slide rod mounting groove, the slide rod is hinged with the shaft support, a limiting ring is fixedly arranged at the other end of the slide rod and is matched with the slide rod seat, a hydraulic rod mounting groove is formed in the center of the shaft support, a hydraulic rod of the hydraulic oil cylinder is matched with the hydraulic rod mounting groove, the top end of the hydraulic rod of the hydraulic oil cylinder is hinged with the shaft support, a support hinged support is arranged at the bottom end of the shaft support and is hinged with the installation box, a roller shaft is arranged on one side of the shaft support, the roller shaft is fixedly connected with the shaft support, and a grinding roller is arranged at one end of the roller far away from the shaft support, install the bearing between grinding roller and the roller, grinding roller passes through the bearing and is connected with the roller rotation, grinding roller keeps away from one side of roller and installs the end cover, be equipped with the shield between grinding roller and the shaft support, the shield is installed on the roller, the shield rotates with the roller to be connected, be equipped with the sealed lid of bearing between shield and the grinding roller, the sealed lid of bearing is installed on grinding roller, the sealed lid of bearing cooperatees with the shield, the sealed lid of bearing rotates with the roller to be connected.
Further, the grinding disc mechanism comprises a grinding disc seat and a grinding ring, the grinding disc seat is fixedly connected with an output shaft of the speed reducer, the bottom end of the grinding disc seat penetrates through the bottom plate, the grinding disc seat is rotatably connected with the bottom plate, the grinding ring is fixedly installed on the upper surface of the grinding disc seat, and the grinding ring is matched with the grinding roller.
Furthermore, a plurality of uniformly distributed blades are arranged in the separator.
Furthermore, the base is provided with a yielding groove at the air inlet pipe and the coupler respectively.
The invention has the beneficial effects that:
according to the invention, the magnet waste is put into the ultrasonic cleaning tank added with the detergent aqueous solution for cleaning, so that impurities such as oil stains and the like adhered to the surface of the waste can be thoroughly cleaned, the impurity content in the magnet waste is reduced, and the magnetic property of a new magnet prepared by treating and recycling the magnet waste is ensured through advanced process flows of grinding, magnetic field forming, vacuum sintering and heat treatment, the utilization rate of waste resources is improved, and the production cost is reduced;
according to the invention, the high-efficiency magnet crushing and grinding equipment is used, the magnet waste is crushed and then directly ground into powder, so that the treatment efficiency of the magnet waste is improved; then screening out magnet powder with qualified particle size by a separator and collecting the magnet powder, and returning unqualified magnet powder to a grinding disc mechanism for grinding again, so that the prepared magnet powder has narrow particle size distribution and good comprehensive magnetic performance, and the performance of the product is improved; the magnetic waste material is not required to be transferred among different grinding devices, so that the contact chance of the material and oxygen is reduced, and the powder is prevented from being oxidized due to the back-and-forth turnover;
according to the invention, the inert gas is filled into the powder grinding device, so that on one hand, the inert gas filled at a high speed is used as power to blow up the magnet powder, and the sieving of the powder with different particle sizes is realized through the separator; on the other hand, the inert gas completely isolates the magnet waste from the air, so that the magnet waste is effectively protected from being oxidized in the process of crushing and grinding the magnet waste, the effective components of the magnet powder are guaranteed, and the product quality is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view showing a structure of a magnet crushing and grinding apparatus in a waste treatment process for magnet processing according to the present invention;
FIG. 2 is a schematic view of the internal structure of the pulverizer of the present invention;
FIG. 3 is a schematic diagram of the separator of the present invention;
FIG. 4 is a schematic view of an assembly structure of a driving roller and a driven roller according to the present invention;
FIG. 5 is an enlarged view of a portion of the invention at C of FIG. 2;
FIG. 6 is a schematic structural view of the grinding roller mechanism of the present invention;
fig. 7 is a schematic structural diagram of the grinding disc mechanism of the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1. a milling device; 1100. a feed hopper; 1101. an upper housing; 1102. a feed pipe; 1103. an air outlet pipe; 1104. a crushing motor; 1105. a driving pulley; 1106. a separator; 1107. a protective cover; 1108. a crushing hopper; 1109. a drive roll; 1110. a drive shaft; 1111. a driven roller; 1112. a driven shaft; 1113. a driving gear; 1114. a driven pulley; 1115. a driven gear; 1116. a blanking port; 1117. a blade; 1200. a lower housing; 1201. a top plate; 1202. installing a box; 1203. a slide bar seat; 1204. a slide bar; 1205. a limiting ring; 1206. a hydraulic cylinder; 1207. a base plate; 1208. an air inlet pipe; 1209. a sheath; 1300. a grinding roller mechanism; 1301. a shaft support; 1302. a slide bar mounting groove; 1303. a hydraulic rod mounting groove; 1304. a support hinged support; 1305. a roll shaft; 1306. a grinding roller; 1307. a bearing; 1308. an end cap; 1309. a bearing seal cover; 1310. a dust cover; 1400. a grinding disc mechanism; 1401. a grinding disc seat; 1402. a grinding ring; 2. an air pump; 3. a base; 4. a speed reducer; 5. a coupling; 6. a main motor; 7. a discharge pipe; 8. a material storage box.
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.
Example 1:
a waste treatment process for magnet processing specifically comprises the following steps:
step S1, waste pretreatment: taking the magnet waste, putting the magnet waste into an ultrasonic cleaning pool, adding a detergent aqueous solution into the ultrasonic cleaning pool, wherein the volume ratio of the magnet waste to the detergent aqueous solution is 1:2, and then carrying out ultrasonic cleaning for 15 min; washing the magnet waste after ultrasonic cleaning for 3min by using clear water, then putting the magnet waste into an oven, setting the oven to be 100 ℃, and baking for 30 min;
step S2, grinding into powder: adding the magnet waste processed in the step S1 into magnet crushing and grinding equipment, grinding the magnet waste into magnet powder of 3.5 microns under the protection of inert gas, adding a lubricant into the magnet powder and mixing, wherein the adding amount of the lubricant is 0.02% of the mass of the magnet powder;
step S3, magnetic field forming: adding the magnet powder crushed and mixed in the step S2 into a die of a forming press, and under the protection of inert gas, using a 2T pulse magnetic field and the pressure of 200MPa to carry out orientation and compression forming to prepare a magnet green compact;
step S4, vacuum sintering: and (2) placing the magnet pressed compact in a vacuum sintering furnace with the temperature set to 1000 ℃ for sintering for 3h, quenching the magnet pressed compact to room temperature by using inert gas, then heating the magnet pressed compact to 880 ℃ for heat preservation for 2h, quenching the magnet pressed compact to room temperature by using inert gas, then heating the magnet pressed compact to 500 ℃ for heat preservation for 2h, and quenching the magnet pressed compact to room temperature by using inert gas to obtain a finished magnet.
The detergent aqueous solution is a sodium carbonate aqueous solution with the mass fraction of 40%, and the temperature of the detergent aqueous solution is 40 ℃.
The lubricant is fatty alcohol-polyoxyethylene ether.
The inert gas is nitrogen.
Example 2:
a waste treatment process for magnet processing specifically comprises the following steps:
step S1, waste pretreatment: taking the magnet waste, putting the magnet waste into an ultrasonic cleaning pool, adding a detergent aqueous solution into the ultrasonic cleaning pool, wherein the volume ratio of the magnet waste to the detergent aqueous solution is 1:2, and then carrying out ultrasonic cleaning for 18 min; washing the magnet waste after ultrasonic cleaning for 4min by using clear water, then putting the magnet waste into an oven, setting the oven to be 150 ℃, and baking for 35 min;
step S2, grinding into powder: adding the magnet waste processed in the step S1 into magnet crushing and grinding equipment, grinding the magnet waste into magnet powder with the particle size of 4 microns under the protection of inert gas, adding a lubricant into the magnet powder, and mixing, wherein the adding amount of the lubricant is 0.02% of the mass of the magnet powder;
step S3, magnetic field forming: adding the magnet powder crushed and mixed in the step S2 into a die of a forming press, and under the protection of inert gas, carrying out orientation and compression forming by using a 3T pulse magnetic field and the pressure of 210MPa to prepare a magnet green compact;
step S4, vacuum sintering: and (2) placing the magnet pressed compact in a vacuum sintering furnace with the temperature set to 1050 ℃ to be sintered for 4h, quenching the magnet pressed compact to room temperature by using inert gas, then heating the magnet pressed compact to 910 ℃ and preserving the heat for 2.5h, quenching the magnet pressed compact to room temperature by using inert gas, then heating the magnet pressed compact to 580 ℃ and preserving the heat for 3h, and quenching the magnet pressed compact to room temperature by using inert gas to obtain a finished magnet product.
The detergent aqueous solution is a sodium carbonate aqueous solution with the mass fraction of 40%, and the temperature of the detergent aqueous solution is 40 ℃.
The lubricant is glyceryl oleate.
The inert gas is nitrogen.
Example 3:
a waste treatment process for magnet processing specifically comprises the following steps:
step S1, waste pretreatment: taking the magnet waste, putting the magnet waste into an ultrasonic cleaning pool, adding a detergent aqueous solution into the ultrasonic cleaning pool, wherein the volume ratio of the magnet waste to the detergent aqueous solution is 1:2, and then carrying out ultrasonic cleaning for 20 min; washing the magnet waste after ultrasonic cleaning with clear water for 5min, then putting the magnet waste into an oven, setting the oven at 200 ℃, and baking for 40 min;
step S2, grinding into powder: adding the magnet waste processed in the step S1 into magnet crushing and grinding equipment, grinding the magnet waste into magnet powder of 5 microns under the protection of inert gas, adding a lubricant into the magnet powder and mixing, wherein the adding amount of the lubricant is 0.02% of the mass of the magnet powder;
step S3, magnetic field forming: adding the magnet powder crushed and mixed in the step S2 into a die of a forming press, and under the protection of inert gas, carrying out orientation and compression forming by using a 3.5T pulse magnetic field and a pressure of 220MPa to prepare a magnet pressed compact;
step S4, vacuum sintering: and (2) placing the magnet pressed compact in a vacuum sintering furnace with the temperature set to 1100 ℃ for sintering for 5h, quenching the magnet pressed compact to room temperature by using inert gas, then heating the magnet pressed compact to 950 ℃ for heat preservation for 3h, quenching the magnet pressed compact to room temperature by using inert gas, then heating the magnet pressed compact to 620 ℃ for heat preservation for 3.5h, and quenching the magnet pressed compact to room temperature by using inert gas to obtain a finished magnet product.
The detergent aqueous solution is trisodium phosphate aqueous solution with the mass fraction of 35%, and the temperature of the detergent aqueous solution is 40 ℃.
The lubricant is sodium dodecyl sulfate.
The inert gas is argon.
Referring to fig. 1-7, the magnet crushing and grinding apparatus in the above embodiment includes a powder grinding device 1, an air pump 2, a base 3, a speed reducer 4, a coupler 5, a main motor 6, a discharging pipe 7 and a storage box 8, where the base 3 is annular, the air pump 2 is disposed on one side of the base 3, the speed reducer 4 is disposed in the center of the base 3, the main motor 6 is disposed on one side of the base 3 away from the air pump 2, the coupler 5 is disposed between the main motor 6 and the speed reducer 4, one end of the coupler 5 is fixedly connected to an input shaft of the speed reducer 4, the other end of the coupler 5 is fixedly connected to an output end of the main motor 6, the powder grinding device 1 is mounted above the base 3, the discharging pipe 7 is disposed between the powder grinding device 1 and the storage box 8, and the storage box 8 is filled with nitrogen;
the grinding device 1 comprises an upper shell 1101, a feeding pipe 1102, a lower shell 1200, a top plate 1201, a bottom plate 1207, a grinding roller mechanism 1300 and a grinding disc mechanism 1400, wherein the lower surface of the bottom plate 1207 is fixedly connected with a base 3, an air inlet pipe 1208 is arranged on one side below the bottom plate 1207, the air inlet pipe 1208 is fixedly connected with the bottom plate 1207, one end of the air inlet pipe 1208 penetrates through the bottom plate 1207, the other end of the air inlet pipe 1208 is communicated with the output end of an air pump 2, the input end of the air pump 2 is communicated with an inert gas compression tank, a sheath 1209 is arranged between the base 3 and a speed reducer 4, the top end of the sheath 1209 is fixedly connected with the lower surface of the bottom plate 1207, the lower shell 1200 is fixedly arranged on the upper surface of the bottom plate 1207, the grinding disc mechanism 1400 is arranged at the center inside the lower shell 1200, a plurality of uniformly distributed installation boxes 1202 are arranged on the side wall of the lower shell 1200, the installation boxes 1202 are fixedly arranged on the side wall of the lower shell 1200, and the installation boxes 1202 are communicated with the inside of the lower shell, the roller grinding mechanism 1300 is installed inside the installation box 1202, the top end of the lower shell 1200 is provided with a top plate 1201, the lower surface of the top plate 1201 is fixedly connected with the lower shell 1200, the center of the top plate 1201 is provided with a through hole, the diameter of the through hole is the same as the inner diameter of the lower shell 1200, an upper shell 1101 is arranged above the top plate 1201, and the bottom end of the upper shell 1101 is fixedly connected with the upper surface of the top plate 1201;
a feeding pipe 1102 is arranged at the center of the top end of the upper shell 1101, the feeding pipe 1102 is fixedly connected with the upper shell 1101, a feeding hopper 1100 is arranged above the feeding pipe 1102, one end of the feeding pipe 1102 penetrates through the upper shell 1101, the other end of the feeding pipe 1102 is fixed with the bottom end of the feeding hopper 1100, the feeding pipe 1102 is communicated with the interior of the feeding hopper 1100, a crushing motor 1104 is fixed on one side of the top end of the upper shell 1101, a driving belt wheel 1105 is fixed at the output end of the crushing motor 1104, an air outlet pipe 1103 is arranged on one side of the top end of the upper shell 1101, which is far away from the crushing motor 1104, the bottom end of the air outlet pipe 1103 is fixedly connected with the upper shell 1101, the air outlet pipe 1103 is communicated with the interior of the upper shell 1101, the top end of the air outlet pipe 1103 is fixedly communicated with one end of a discharging pipe 7, the other end of the discharging pipe 7 is communicated with a storage tank 8, a separator 1106 is arranged inside the upper shell 1101, the top end of the separator 1106 is fixedly connected with the upper surface inside the upper shell 1101, a protective cover 1107 is arranged between the separator 1106 and the feeding pipe 1102, protection cover 1107 top and the inside upper surface fixed connection of upper housing 1101, protection cover 1107 bottom and inlet pipe 1102 fixed connection, the inside crushed aggregates fill 1108 that is equipped with of upper housing 1101, crushed aggregates fill 1108 top and separator 1106 bottom fixed connection, crushed aggregates fill 1108 bottom is equipped with blanking mouth 1116, and blanking mouth 1116 is located the casing 1200 inside down.
A driving shaft 1110 and a driven shaft 1112 are arranged in the material crushing bucket 1108, the driving shaft 1110 and the driven shaft 1112 are symmetrically arranged, two ends of the driving shaft 1110 and the driven shaft 1112 penetrate through the side wall of the material crushing bucket 1108, the driving shaft 1110 and the driven shaft 1112 are rotatably connected with the material crushing bucket 1108, two ends of the driving shaft 1110 and the driven shaft 1112 penetrate through the upper shell 1101, the driving shaft 1110 and the driven shaft 1112 are rotatably connected with the upper shell 1101, a driving roller 1109 is fixedly arranged on the driving shaft 1110, a driven roller 1111 is fixedly arranged on the driven shaft 1112, the driving roller 1109 and the driven roller 1111 are both positioned in the material crushing bucket 1108, a plurality of uniformly distributed spurs are arranged on the surfaces of the driving roller 1109 and the driven roller 1111, the driving roller 1109 and the driven roller 1111 are matched with each other, a driven pulley 1114 is arranged at one end of the driving shaft 1110, the driven pulley 1114 is in belt transmission with the driving pulley 1114, a driving gear 1113 is arranged between the driven pulley 1114 and the upper shell 1101, the driving gear 1113 is fixedly arranged on the driving shaft 1110, a driven gear 1115 is fixed to one end of the driven shaft 1112, and a drive gear 1113 meshes with the driven gear 1115.
A sliding rod seat 1203 is fixedly arranged above the side wall of the installation box 1202, a sliding rod 1204 is arranged in the sliding rod seat 1203, the sliding rod 1204 is in sliding connection with the sliding rod seat 1203, a hydraulic oil cylinder 1206 is arranged below the sliding rod seat 1203, a cylinder body of the hydraulic oil cylinder 1206 is fixedly connected with the side wall of the installation box 1202, the grinding roller mechanism 1300 comprises a shaft support 1301, a sliding rod installation groove 1302 is arranged at the top end of the shaft support 1301, one end of the sliding rod 1204 is matched with the sliding rod installation groove 1302, the sliding rod 1204 is hinged with the shaft support 1301, a limiting ring 1205 is fixedly arranged at the other end of the sliding rod 1204, the limiting ring 1205 is matched with the sliding rod seat 1203, a hydraulic rod installation groove 1303 is arranged in the center of the shaft support 1301, a hydraulic rod of the hydraulic oil cylinder 1206 is matched with the hydraulic rod installation groove 1303, the top end of the hydraulic rod of the hydraulic oil cylinder 1206 is hinged with the shaft support 1301, a support hinged seat 1304 is arranged at the bottom end of the shaft support 1301, the support 1304 is hinged with the installation box 1202, a roller shaft 1305 is arranged on one side of the shaft support 1301, the roller shaft 1305 is fixedly connected with the shaft support 1301, a grinding roller 1306 is arranged at one end, away from the shaft support 1301, of the roller shaft 1305, a bearing 1307 is arranged between the grinding roller 1306 and the roller shaft 1305, the grinding roller 1306 is rotatably connected with the roller shaft 1305 through the bearing 1307, an end cover 1308 is arranged on one side, away from the roller shaft 1305, of the grinding roller 1306, a dust cover 1310 is arranged between the grinding roller 1306 and the shaft support 1301, the dust cover 1310 is arranged on the roller shaft 1305, the dust cover 1310 is rotatably connected with the roller shaft 1305, a bearing sealing cover 1309 is arranged between the dust cover 1310 and the grinding roller 1306, the bearing sealing cover 1309 is arranged on the grinding roller 1306, the bearing sealing cover 1309 is matched with the dust cover 1310, and the bearing sealing cover 1309 is rotatably connected with the roller shaft 1305.
The grinding disc mechanism 1400 comprises a grinding disc seat 1401 and a grinding ring 1402, the grinding disc seat 1401 is fixedly connected with an output shaft of the speed reducer 4, the bottom end of the grinding disc seat 1401 penetrates through the bottom plate 1207, the grinding disc seat 1401 is rotatably connected with the bottom plate 1207, the grinding ring 1402 is fixedly installed on the upper surface of the grinding disc seat 1401, and the grinding ring 1402 is matched with the grinding roller 1306.
A plurality of uniformly distributed blades 1117 are arranged in the separator 1106.
The base 3 is provided with a yielding groove at the air inlet pipe 1208 and the coupler 5 respectively.
The working principle of the invention is as follows:
adding magnet waste into a feed hopper 1100 of a magnet crushing and grinding device, starting an air pump 2, filling inert gas into a grinding device 1, enabling the magnet waste to enter a space between a driving roller 1109 and a driven roller 1111 through a feed pipe 1102, starting a crushing motor 1104, enabling an output end of the crushing motor 1104 to drive a driving pulley 1105 to rotate, enabling the driving pulley 1105 to drive a driven pulley 1114 to rotate through a belt, enabling the driven pulley 1114 to drive a driving shaft 1110 and the driving roller 1109 to rotate, enabling a driving gear 1113 to be meshed with a driven gear 1115, enabling the driven gear 1115 to drive a driven shaft 1112 and the driven roller 1111 to rotate, enabling the driving roller 1109 and the driven roller 1111 to rotate oppositely, crushing the magnet waste into particles and enabling the particles to fall into a crushed material hopper 1108, enabling the magnet particles to fall onto a grinding disc seat 1401 from a discharge port 1116, starting a main motor 6, enabling an output end of the main motor 6 to drive an input shaft of a speed reducer 4 to rotate through a coupler 5, enabling an output shaft of the speed reducer 4 to drive the grinding disc seat 1401 to rotate, extending a hydraulic oil cylinder 1206, enabling the grinding surface of a grinding roller 1306 to approach to a grinding ring 1402, enabling the magnet particles to move towards the edge of a grinding disc seat 1401 due to centrifugal force, grinding the magnet particles by the grinding roller 1306 in the moving process, enabling the magnet particles to be ground into powder, enabling the magnet powder to fly out of the edge of the grinding disc seat 1401 due to the centrifugal force, blowing up by inert gas flowing at high speed, rising to the position of a separator 1106 at the top of the grinding device 1, enabling the magnet powder with qualified particle size to pass through blades 1117 in the separator 1106 and further blowing out from an air outlet pipe 1103, enabling the magnet powder with larger particle size to collide with the blades 1117 in the separator 1106, falling to a blanking port 1116 along the inner wall of a particle hopper 1108, then returning to the grinding disc seat 1401, and grinding again through the grinding roller 1306 to form powder with qualified particle size; the magnet powder blown out from the outlet pipe 1103 enters the storage box 8 through the discharge pipe 7 to be collected for later use.
The foregoing is merely exemplary and illustrative of the principles of the present invention and various modifications, additions and substitutions of the specific embodiments described herein may be made by those skilled in the art without departing from the principles of the present invention or exceeding the scope of the claims set forth herein.
Claims (6)
1. A waste treatment process for magnet processing is characterized in that: the method specifically comprises the following steps:
step S1, waste pretreatment: taking the magnet waste, putting the magnet waste into an ultrasonic cleaning pool, adding a detergent aqueous solution into the ultrasonic cleaning pool, wherein the volume ratio of the magnet waste to the detergent aqueous solution is 1:2, and then carrying out ultrasonic cleaning for 15-20 min; washing the magnet waste material subjected to ultrasonic cleaning with clear water for 3-5min, then placing the magnet waste material into an oven, setting the oven at 200 ℃ for 100-;
step S2, grinding into powder: adding the magnet waste processed in the step S1 into a feed hopper (1100) of a magnet crushing and grinding device, starting an air pump (2), filling inert gas into a grinding device (1), enabling the magnet waste to enter a space between a driving roller (1109) and a driven roller (1111) through a feed pipe (1102), starting a crushing motor (1104), driving the driving roller (1109) and the driven roller (1111) to rotate oppositely, crushing the magnet waste into particles and dropping the particles into a crushing hopper (1108), enabling the magnet particles to drop onto a grinding disc seat (1106) through a dropping port (1116), starting a main motor (6), enabling a grinding disc mechanism (1400) to rotate, extending a hydraulic oil cylinder (1206), enabling a grinding roller (1306) to approach to a grinding ring (1402), grinding the magnet particles into powder, blowing up the magnet powder by the inert gas at the edge of the grinding disc seat (1401), enabling the magnet powder to reach a separator (1106) and sieving by blades (1117), blowing magnet powder with the particle size of 3.5-5 mu m out of an air outlet pipe (1103), feeding the magnet powder into a storage box (8) through a discharge pipe (7), collecting the magnet powder, adding a lubricant into the magnet powder in the storage box (8), and uniformly mixing the lubricant and the magnet powder, wherein the adding amount of the lubricant is 0.02% of the mass of the magnet powder;
step S3, magnetic field forming: adding the magnet powder crushed and mixed in the step S2 into a die of a forming press, and under the protection of inert gas, using a pulse magnetic field of 2.0-3.5T and the pressure of 200-220MPa to carry out orientation and press forming to prepare a magnet green compact;
step S4, vacuum sintering: placing the magnet pressed compact in a vacuum sintering furnace with the temperature set to be 1000-1100 ℃ for sintering for 3-5h, quenching the magnet pressed compact to room temperature by using inert gas, then heating the magnet pressed compact to be 880-950 ℃ for heat preservation for 2-3h, quenching the magnet pressed compact to be room temperature by using inert gas, then heating the magnet pressed compact to be 500-620 ℃ for heat preservation for 2-3.5h, and quenching the magnet pressed compact to be room temperature by using inert gas to obtain a magnet finished product;
the magnet crushing and grinding equipment comprises a grinding device (1), a base (3) and a storage box (8), wherein the base (3) is annular, an air pump (2) is arranged on one side of the base (3), a speed reducer (4) is arranged at the center of the base (3), a main motor (6) is arranged on one side, away from the air pump (2), of the base (3), a coupler (5) is installed between the main motor (6) and the speed reducer (4), the grinding device (1) is installed above the base (3), a discharging pipe (7) is communicated between the grinding device (1) and the storage box (8), and nitrogen is filled in the storage box (8);
the grinding device (1) comprises a lower shell (1200) and a bottom plate (1207), the lower surface of the bottom plate (1207) is fixedly connected with a base (3), an air inlet pipe (1208) is fixed on one side below the bottom plate (1207), one end of the air inlet pipe (1208) penetrates through the bottom plate (1207), the other end of the air inlet pipe (1208) is communicated with the output end of an air pump (2), a sheath (1209) is arranged between the base (3) and a speed reducer (4), the top end of the sheath (1209) is fixedly connected with the lower surface of the bottom plate (1207), the lower shell (1200) is fixedly installed on the upper surface of the bottom plate (1207), a grinding disc mechanism (1400) is arranged at the center inside of the lower shell (1200), a plurality of uniformly distributed installation boxes (1202) are arranged on the side wall of the lower shell (1200), the installation boxes (1202) are fixedly installed on the side wall of the lower shell (1200), the installation boxes (1202) are communicated with the inside of the lower shell (1200), a grinding roller mechanism (1300) is installed inside the installation boxes (1202), a top plate (1201) is fixed at the top end of the lower shell (1200), a through hole is formed in the center of the top plate (1201), the diameter of the through hole is the same as the inner diameter of the lower shell (1200), and an upper shell (1101) is fixed above the top plate (1201);
the feeding pipe (1102) is fixed at the center of the top end of the upper shell (1101), the feeding pipe (1102) is fixedly communicated with the upper portion of the feeding pipe (1100), the crushing motor (1104) is fixed on one side of the top end of the upper shell (1101), the driving belt wheel (1105) is fixedly installed at the output end of the crushing motor (1104), the air outlet pipe (1103) is fixedly communicated with the top end of the upper shell (1101), the air outlet pipe (1103) is communicated with the storage box (8) through the discharging pipe (7), the separator (1106) is fixed on the upper surface inside the upper shell (1101), the protective cover (1107) is arranged between the separator (1106) and the feeding pipe (1102), the top end of the protective cover (1107) is fixedly connected with the upper surface inside the upper shell (1101), the bottom end of the protective cover (1107) is fixedly connected with the feeding pipe (1102), the crushing hopper (1108) is arranged inside the upper shell (1101), and the top end of the crushing hopper (1108) is fixedly connected with the bottom end of the separator (1106), a blanking port (1116) is formed in the bottom end of the crushing hopper (1108), and the blanking port (1116) is located inside the lower shell (1200); a driving shaft (1110) and a driven shaft (1112) are symmetrically arranged in the crushing hopper (1108), the driving shaft (1110) and the driven shaft (1112) penetrate through the crushing hopper (1108) and are rotationally connected with the crushing hopper (1108), two ends of the driving shaft (1110) and the driven shaft (1112) are rotationally connected with an upper shell (1101), a driving roller (1109) is fixedly arranged on the driving shaft (1110), a driven roller (1111) is fixedly arranged on the driven shaft (1112), the driving roller (1109) and the driven roller (1111) are both positioned in the crushing hopper (1108), a plurality of uniformly distributed burs are arranged on the surfaces of the driving roller (1109) and the driven roller (1111), the driving roller (1109) and the driven roller (1111) are matched with each other, a driven pulley (1114) is arranged at one end of the driving shaft (1110), the driven pulley (1114) and the driving pulley (1105) are in belt transmission, a driving gear (1113) is arranged between the driven pulley (1114) and the upper shell (1101), the driving gear (1113) is fixedly arranged on the driving shaft (1110), one end of the driven shaft (1112) is fixedly provided with a driven gear (1115), and the driving gear (1113) is meshed with the driven gear (1115);
a sliding rod seat (1203) is fixedly arranged above the side wall of the installation box (1202), a sliding rod (1204) is arranged in the sliding rod seat (1203), the sliding rod (1204) is in sliding connection with the sliding rod seat (1203), a hydraulic oil cylinder (1206) is arranged below the sliding rod seat (1203), a cylinder body of the hydraulic oil cylinder (1206) is fixedly connected with the side wall of the installation box (1202), the grinding roller mechanism (1300) comprises a shaft bracket (1301), a sliding rod installation groove (1302) is arranged at the top end of the shaft bracket (1301), one end of the sliding rod (1204) is matched with the sliding rod installation groove (1302), the sliding rod (1204) is hinged with the shaft bracket (1301), a limiting ring (1205) is fixedly arranged at the other end of the sliding rod (1204) and matched with the sliding rod seat (1203), a hydraulic oil cylinder installation groove (1303) is arranged at the center of the shaft bracket (1301), a hydraulic rod of the hydraulic oil cylinder (1206) is matched with the hydraulic rod installation groove (1303), and the top end of the hydraulic rod of the hydraulic oil cylinder (1206) is hinged with the shaft bracket (1301), the bottom end of the shaft support (1301) is provided with a support hinged support (1304), the support hinged support (1304) is hinged with the installation box (1202), one side of the shaft support (1301) is fixed with a roller shaft (1305), one end, far away from the shaft support (1301), of the roller shaft (1305) is provided with a grinding roller (1306), the grinding roller (1306) is rotatably connected with the roller shaft (1305) through a bearing (1307), one side, far away from the roller shaft (1305), of the grinding roller (1306) is provided with an end cover (1308), a dust cover (1310) is arranged between the grinding roller (1306) and the shaft support (1301), the dust cover (1310) is rotatably installed on the roller shaft (1305), a bearing sealing cover (1309) is arranged between the dust cover (1310) and the grinding roller (1306), the bearing sealing cover (1309) is installed on the grinding roller (1306), the bearing sealing cover (1309) is matched with the dust cover (1310), and the bearing roller shaft (1305) is rotatably connected;
the grinding disc mechanism (1400) comprises a grinding disc seat (1401) and a grinding ring (1402), the grinding disc seat (1401) is fixedly connected with an output shaft of the speed reducer (4), the bottom end of the grinding disc seat (1401) penetrates through the bottom plate (1207), the grinding disc seat (1401) is rotatably connected with the bottom plate (1207), the grinding ring (1402) is fixedly installed on the upper surface of the grinding disc seat (1401), and the grinding ring (1402) is matched with the grinding roller (1306).
2. The process of claim 1, wherein the step of treating the waste material for magnet machining comprises: the detergent aqueous solution is a sodium carbonate aqueous solution with the mass fraction of 40% or a trisodium phosphate aqueous solution with the mass fraction of 35%, and the temperature of the detergent aqueous solution is 40 ℃.
3. The process of claim 1, wherein the step of treating the waste material for magnet machining comprises: the lubricant is one or a mixture of more of fatty alcohol-polyoxyethylene ether, glyceryl oleate and lauryl sodium sulfate in any proportion.
4. The process of claim 1, wherein the step of treating the waste material for magnet machining comprises: the inert gas is nitrogen or argon.
5. The process of claim 1, wherein the step of treating the waste material for magnet machining comprises: a plurality of blades (1117) which are uniformly distributed are arranged in the separator (1106).
6. The process of claim 1, wherein the step of treating the waste material for magnet machining comprises: the base (3) is provided with yielding grooves at the air inlet pipe (1208) and the coupler (5) respectively.
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| CN112791765B (en) * | 2020-12-04 | 2022-05-20 | 横店集团东磁股份有限公司 | Recycling method of bonded neodymium iron boron magnet |
| CN113118117B (en) * | 2021-04-01 | 2022-02-25 | 赣州市恒源科技股份有限公司 | Separation and recovery device for neodymium iron boron waste treatment |
| CN114534890B (en) * | 2022-02-14 | 2023-10-20 | 陕西榆能创力智能装备有限公司 | Medium-speed multistage coal mill |
| CN115430487A (en) * | 2022-09-09 | 2022-12-06 | 安徽省东博米业有限公司 | Rice flour processingequipment of many grinding rollers of rice |
| CN116970800B (en) * | 2023-09-21 | 2023-12-05 | 江西荧光磁业有限公司 | Treatment device and recycling method for sintered NdFeB solid waste |
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Address after: 231524 shitouzhen Industrial Park, Lujiang County, Hefei City, Anhui Province Patentee after: Anhui Wanci Electronics Co.,Ltd. Address before: 231500 Stone Town Industrial Park, Lujiang County, Hefei City, Anhui Province Patentee before: ANHUI ONE MAGNET ELECTRONIC Co.,Ltd. |