Neodymium-iron-boron rare earth permanent magnet material impurity separation device and using method thereof

Abstract

The invention discloses a neodymium-iron-boron rare earth permanent magnet material impurity separation device and a use method thereof, and relates to the technical field of impurity separation, the neodymium-iron-boron rare earth permanent magnet material impurity separation device comprises a quality inspection module, the quality inspection module is used for performing result inspection on the material quality of the neodymium-iron-boron rare earth permanent magnet material impurity separation effect; and the quality inspection module comprises a laboratory unit, a performance test unit and an appearance inspection unit. By designing the quality inspection module, the function of inspecting key quality indexes of the neodymium-iron-boron rare earth permanent magnet material after impurity separation is achieved, the problem that products do not meet quality standards and requirements due to the fact that quality inspection cannot be conducted on the separated neodymium-iron-boron rare earth permanent magnet material is solved, the stability and consistency of the products are improved, and the production efficiency is improved. And the defective rate is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of impurity separation, and in particular to a NdFeB rare earth permanent magnet material impurity separation device and a use method thereof. Background Art

[0002] With the widespread application of NdFeB rare earth permanent magnet materials, the requirements for their quality and performance are also increasing. However, it is difficult to avoid the mixing of impurities in the production process. These impurities may come from raw materials, production processes or equipment, which seriously affect the quality and stability of NdFeB rare earth permanent magnet materials.

[0003] In view of the common magnetic and non-magnetic impurities in NdFeB rare earth permanent magnet materials, an efficient separation device is needed that can quickly and accurately separate the impurities from the main material to ensure the purity and performance stability of the final product. At the same time, the device needs to have the characteristics of automated control, high energy consumption, easy operation and maintenance to meet the needs of industrial production.

[0004] Therefore, it is very necessary to propose an impurity separation device for NdFeB rare earth permanent magnet materials and a method of using the same in the present application to solve the problem of impurity separation in NdFeB rare earth permanent magnet materials.

[0005] 1. Patent document CN106944253B discloses a rare earth permanent magnet material impurity separation device. The above patent realizes the effective separation of permanent magnet materials from impurities without damaging the permanent magnet material magnet, but the above patent cannot realize the inspection function of key quality indicators of NdFeB rare earth permanent magnet materials after impurity separation.

[0006] 2. Patent document CN106925420B discloses a magnetic separation device for separating impurities from rare earth permanent magnet materials. The above patent realizes that a lifting mechanism drives a scraping mechanism to rotate, and the scraping mechanism drives a magnetic plate to rotate, so that the magnetic plate tilts to the right, and the impurities fall due to gravity for collection. However, the above patent cannot realize the function of separating magnetic impurities from neodymium iron boron rare earth permanent magnet materials.

[0007] 3. Patent document CN112495583B discloses a continuous rare earth permanent magnet powder separation and screening device. The above patent realizes the continuous separation of impurities in rare earth permanent magnet powder, replaces the traditional impurity separation method, and improves the efficiency of impurity separation of rare earth permanent magnet powder. In addition, the rare earth permanent magnet powder after impurity removal can be screened according to different particle sizes to avoid affecting the stability and magnetism of rare earth permanent magnet materials in later use. However, the above patent cannot realize the function of separating non-magnetic impurities from neodymium iron boron rare earth permanent magnet materials.

[0008] 4. The patent document discloses a method that the above patent realizes, but the above patent cannot realize the real-time monitoring and feedback function of separation processing and inspection results.

[0009] In summary, the above patents cannot realize the inspection function of key quality indicators of NdFeB rare earth permanent magnet materials after impurity separation, the separation function of magnetic impurities of NdFeB rare earth permanent magnet materials, the separation function of non-magnetic impurities of NdFeB rare earth permanent magnet materials, and the real-time monitoring and feedback function of separation processing and inspection results, resulting in poor impurity separation effect, substandard product quality, poor economic benefits and the inability to optimize separation technology;

[0010] To this end, the present application proposes a NdFeB rare earth permanent magnet material impurity separation device and its use method, which can realize the inspection function of key quality indicators of NdFeB rare earth permanent magnet materials after impurity separation, the separation function of magnetic impurities of NdFeB rare earth permanent magnet materials, the separation function of non-magnetic impurities of NdFeB rare earth permanent magnet materials and the real-time monitoring and feedback function of separation processing and inspection results. Summary of the invention

[0011] The purpose of the present invention is to provide an impurity separation device for NdFeB rare earth permanent magnet materials and a method of using the same, so as to solve the technical problems proposed in the above background technology that the key quality indicators of NdFeB rare earth permanent magnet materials after impurity separation cannot be inspected, the magnetic impurity separation function of NdFeB rare earth permanent magnet materials cannot be separated, the non-magnetic impurity separation function of NdFeB rare earth permanent magnet materials cannot be separated, and the real-time monitoring and feedback function of separation processing and inspection results cannot be realized, resulting in poor impurity separation effect, substandard product quality, poor economic benefits and inability to optimize separation technology.

[0012] To achieve the above object, the present invention provides the following technical solutions: a device for separating impurities from NdFeB rare earth permanent magnet materials, comprising a quality inspection module, wherein the quality inspection module is used to inspect the quality of the impurity separation effect of the NdFeB rare earth permanent magnet materials;

[0013] The quality inspection module includes: a testing unit, a performance testing unit and an appearance inspection unit;

[0014] The testing unit is equipped with high-precision testing equipment to analyze the chemical composition of the product to ensure that the product meets the standard requirements;

[0015] The performance testing unit uses a fully automatic magnetic performance tester to measure the magnetic saturation magnetic induction intensity and coercive force index of the product to ensure that the product performance meets the standards;

[0016] The appearance inspection unit uses a high-definition microscope to inspect the product surface to ensure that the product appearance is intact.

[0017] Preferably, the quality inspection module is connected to a drying processing module via a chain conveyor, and the drying processing module is used to dry the NdFeB rare earth permanent magnet material;

[0018] The drying processing module includes: a drying unit, a cooling unit and a conveying unit. The drying unit is connected to the cooling unit through a transmission pipeline, and the cooling unit is connected to the chain conveyor loading port in the conveying unit through a feeding pipeline.

[0019] The drying unit uses a hot air circulation dryer with adjustable temperature and uniform drying characteristics to dry the NdFeB rare earth permanent magnet material after impurities are separated to ensure that the product dryness meets the standard;

[0020] The cooling unit uses a cooling fan to quickly cool the NdFeB rare earth permanent magnet material to prevent the product from being overheated and affecting its quality.

[0021] The conveying unit adopts a chain conveyor with stable conveying speed and reliable conveying effect to ensure that the products are smoothly conveyed to the quality inspection module.

[0022] Preferably, the quality inspection module is used to perform quality inspection on the NdFeB rare earth permanent magnet material after being processed by the magnetic impurity separation module and the non-magnetic impurity separation module;

[0023] The magnetic impurity separation module is used to separate the magnetic impurities in the NdFeB rare earth permanent magnet material. The magnetic impurity separation module is connected to the quality inspection module through a transmission pipeline;

[0024] The magnetic impurity separation module includes: a magnetic separation unit, an iron removal unit and a fine magnetic unit;

[0025] The magnetic separation unit uses a high-intensity permanent magnetic separator to effectively separate the magnetic impurities in the NdFeB rare earth permanent magnetic material;

[0026] The iron removal unit uses an electromagnetic iron remover that automatically removes iron filings. It has a timed cleaning function to continuously and efficiently remove iron filings from NdFeB rare earth permanent magnet materials.

[0027] The fine magnetic unit uses a high gradient magnetic separator to finely separate the magnetic impurities in NdFeB rare earth permanent magnet materials.

[0028] Preferably, the non-magnetic impurity separation module is used to separate and remove non-magnetic impurities in the NdFeB rare earth permanent magnet material;

[0029] The non-magnetic impurity separation module includes: a washing unit, a screening unit and a filtering unit. The washing unit is connected to the fine magnetic unit of the magnetic impurity separation module through a pipeline, the washing unit is connected to the screening unit through a discharge pipeline, and the screening unit is connected to the filtering unit through a pipeline;

[0030] The washing unit uses high-efficiency water washing equipment and high-efficiency cleaning agents to wash the NdFeB rare earth permanent magnet materials;

[0031] The screening unit uses multi-level vibrating screening equipment to perform precise screening operations as needed to remove non-magnetic impurities of different particle sizes in the NdFeB rare earth permanent magnet material;

[0032] The filter unit uses a high-precision pressure filter to remove small particles of non-magnetic impurities remaining in the NdFeB rare earth permanent magnet material.

[0033] Preferably, the impurity separation device is further designed with a raw material processing module, which is used to perform pretreatment operations on the NdFeB rare earth permanent magnet material before impurity separation;

[0034] The raw material processing module includes: a raw material feeding unit, a crushing unit and a screening unit, the raw material feeding unit is connected to the feeding port of the crushing unit through a vibrating feeder, the crushing unit is connected to the screening unit through a pipeline, and the screening unit is connected to the feeding port of the magnetic impurity separation module through a pipeline;

[0035] The raw material feeding unit uses a vibrating feeder with a stable feeding speed and accurate metering function to transport the raw materials of NdFeB rare earth permanent magnet materials from the storage system to the separation device;

[0036] The crushing unit uses a jaw crusher with a large crushing ratio and processing capacity, uses raw materials of different particle sizes, and controls the particle size by adjusting the discharge port;

[0037] The screening unit adopts a multi-level vibrating screener, which adjusts the size of the screen holes according to requirements to separate raw material particles of different sizes.

[0038] Preferably, the quality inspection module is connected to a packaging module via an automated packaging line, and the packaging module is used to package the NdFeB rare earth permanent magnet material after the separation process is completed;

[0039] The packaging module includes: packaging preparation unit, metering and filling unit and packaging and coding unit;

[0040] The packaging preparation unit integrates an automatic baler and a weigher to package the quality-inspected NdFeB rare earth permanent magnet materials;

[0041] The metering and filling unit is equipped with a metering pump for accurate metering and filling, thus avoiding product loss and waste;

[0042] The packaging and coding unit uses automatic sealing machines and inkjet printers to seal and mark the packaged product packages.

[0043] Preferably, the quality inspection module is connected to a feedback module via a data signal line, and the feedback module is used to record the quality inspection information and feed it back to the control system;

[0044] The feedback module includes: a quality problem feedback unit, a feedback analysis and recording unit, and a feedback transmission execution unit;

[0045] The quality problem feedback unit receives the inspection data of the quality inspection module through the data signal line, and transmits the inspection data to the feedback analysis and recording unit through the database;

[0046] The feedback analysis and recording unit performs statistical analysis on the inspection data, analyzes the abnormal data, and transmits the abnormal analysis results and improvement suggestions to the feedback transmission execution unit through the data signal line;

[0047] The feedback transmission execution unit is connected with the magnetic impurity separation module and the non-magnetic impurity separation module through a data signal line, and generates a signal through a PID control algorithm and transmits it to the magnetic impurity separation module and the non-magnetic impurity separation module.

[0048] Preferably, the specific formula of the PID control algorithm in the feedback transmission execution unit is as follows:

[0049]

[0050] Among them, u(t) is the controller output, that is, the control signal to be applied;

[0051] e(t) is the error at the current moment, that is, the difference between the set value and the actual value;

[0052] Kp is the proportional coefficient, which is used to adjust the effect of the proportional part;

[0053] Ki is the integral coefficient, which is used to adjust the effect of the integral part;

[0054] Kd is the differential coefficient, which is used to adjust the effect of the differential part.

[0055] Preferably, the method of use comprises the following steps:

[0056] S1. Feed pretreatment: introducing the original mixture containing NdFeB rare earth permanent magnet material into the raw material pretreatment module through the raw material feeding unit;

[0057] S2. Magnetic impurity separation: The pre-treated mixture enters the magnetic impurity separation module, where the magnetic impurities are separated from the NdFeB rare earth permanent magnet material under the action of a strong magnetic field. The magnetic impurities are adsorbed on the magnet while the rare earth material passes through.

[0058] S3, non-magnetic impurity separation: the rare earth material after magnetic impurity separation enters the non-magnetic impurity separation module, in which the non-magnetic impurities are separated by physical and chemical methods;

[0059] S4. Quality inspection feedback: After separation, the materials enter the quality inspection module, which performs quality inspection on the materials and transmits the inspection result data to the feedback module.

[0060] Preferably, the method of use further comprises the following steps:

[0061] S11, using a crushing unit and a screening unit in a feed pretreatment module to perform preliminary processing to remove large particle impurities, filter impurities and adjust the particle size of the material;

[0062] S21, at the same time, the material after impurity separation is dried by a drying module;

[0063] S41. When the quality inspection is qualified, the materials are packaged and marked through the packaging module;

[0064] S42. When the quality inspection fails, the feedback module generates a control adjustment signal based on the abnormal data analysis and transmits it to the control systems of the magnetic impurity separation module and the non-magnetic impurity separation module for feedback adjustment and optimization control.

[0065] Compared with the prior art, the present invention has the following beneficial effects:

[0066] 1. The present invention is designed with a quality inspection module to realize the inspection function of key quality indicators of NdFeB rare earth permanent magnet materials after impurity separation, solves the problem that the quality of NdFeB rare earth permanent magnet materials after separation cannot be inspected, resulting in products not meeting quality standards and requirements, improves product stability and consistency, and reduces the defective rate;

[0067] 2. The present invention realizes the magnetic impurity separation function of NdFeB rare earth permanent magnet materials by designing a magnetic impurity separation module, thereby improving the purity and magnetic properties of the product, enhancing the magnetic properties of the product, reducing the magnetic impurity content of the product, and increasing the reliability and service life of the product in the application field;

[0068] 3. The present invention realizes the function of separating non-magnetic impurities of NdFeB rare earth permanent magnet materials by designing a non-magnetic impurity separation module, separates non-magnetic impurities from rare earth materials, and improves the chemical composition stability and purity of the product;

[0069] 4. The present invention realizes the real-time monitoring and feedback function of separation processing and inspection results by designing a feedback module, thereby improving the automation and intelligence level of the production process, reducing the occurrence and repetition of quality problems, optimizing the production process, reducing production costs, and improving product quality and customer satisfaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0070] Figure 1 It is a schematic diagram of the workflow of the present invention;

[0071] Figure 2 It is a schematic diagram of the quality inspection module of the present invention;

[0072] Figure 3 It is a schematic diagram of a magnetic impurity separation module of the present invention;

[0073] Figure 4 This is a schematic diagram of a non-magnetic impurity separation module of the present invention;

[0074] Figure 5 It is a schematic diagram of a drying module of the present invention;

[0075] Figure 6 It is a schematic diagram of the feedback module of the present invention. DETAILED DESCRIPTION

[0076] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0077] Example 1

[0078] See also Figure 1 and Figure 2 , an embodiment provided by the present invention: a device for separating impurities from NdFeB rare earth permanent magnet materials, comprising a quality inspection module, the quality inspection module being used to inspect the quality of the impurity separation effect of the NdFeB rare earth permanent magnet materials;

[0079] The quality inspection module includes: a testing unit, a performance testing unit and an appearance inspection unit;

[0080] The testing unit is equipped with high-precision testing equipment to analyze the chemical composition of the product to ensure that the product meets the standard requirements;

[0081] The performance testing unit uses a fully automatic magnetic performance tester to measure the magnetic saturation magnetic induction intensity and coercive force index of the product to ensure that the product performance meets the standards;

[0082] The appearance inspection unit uses a high-definition microscope to inspect the product surface to ensure that the product appearance is intact;

[0083] Furthermore, representative samples are taken from the production line, the collected samples are ground and proofed, and the chemical composition of the samples is analyzed using chemical analysis instruments to detect the content of key elements, such as neodymium, iron, boron, etc. The analysis results are tested and verified, and the test results are recorded on the test sheet, including information such as element content and composition ratio, as the basis for subsequent quality assessment;

[0084] The samples obtained from the test unit are prepared and processed, such as magnetization and temperature adjustment, to achieve the state required for the test. The samples are tested for magnetic properties using a fully automatic magnetic properties tester, including tests of remanence, coercive force, magnetic energy product and other indicators, to evaluate whether the magnetic properties of the product meet the requirements. The test results are analyzed and compared, and the performance test results are recorded on the performance test sheet, including the values ​​and analysis conclusions of various magnetic properties indicators, as an important basis for product quality evaluation;

[0085] The samples obtained from the performance test unit are prepared before appearance inspection, such as cleaning and polishing, to keep the sample surface clean. The samples are inspected for appearance using high-definition microscope equipment to detect surface defects such as cracks, bubbles, discoloration, etc., to evaluate the appearance quality of the product. The appearance inspection results are recorded on the appearance inspection sheet, including information such as the type and quantity of defects detected, as the basis for product appearance quality evaluation.

[0086] Example 2

[0087] See also Figure 1 , Figure 2 and Figure 5 , an embodiment provided by the present invention: a device for separating impurities from NdFeB rare earth permanent magnet materials, wherein the quality inspection module is connected to a drying processing module via a chain conveyor, and the drying processing module is used to dry the NdFeB rare earth permanent magnet materials;

[0088] The drying processing module includes: a drying unit, a cooling unit and a conveying unit. The drying unit is connected to the cooling unit through a transmission pipeline, and the cooling unit is connected to the chain conveyor loading port in the conveying unit through a feeding pipeline.

[0089] The drying unit uses a hot air circulation dryer with adjustable temperature and uniform drying characteristics to dry the NdFeB rare earth permanent magnet material after impurities are separated to ensure that the product dryness meets the standard;

[0090] The cooling unit uses a cooling fan to quickly cool the NdFeB rare earth permanent magnet material to prevent the product from being overheated and affecting its quality.

[0091] The conveying unit adopts a chain conveyor with stable conveying speed and reliable conveying effect to ensure that the products are smoothly conveyed to the quality inspection module;

[0092] Furthermore, the NdFeB rare earth permanent magnet material comes out of the production line and first passes through the sample receiving area of ​​the drying unit for preliminary cleaning and preparation. The pre-treated material is conveyed to the drying chamber by a conveyor belt. In the drying chamber, the hot air circulation dryer is started to mainly dry the NdFeB rare earth permanent magnet material by hot air.

[0093] The dried NdFeB rare earth permanent magnet material enters the cooling unit, where the cooling fan is used to quickly cool the material and restore the material temperature to the ambient temperature to avoid the influence of temperature difference on the material structure and performance. The cooling unit is used to reduce the residual heat of the product and ensure product quality.

[0094] The cooled NdFeB rare earth permanent magnet material enters the conveying unit, and the processed material is smoothly transported to the quality inspection module through the chain conveyor. The conveying speed and transportation direction are controlled to ensure the safe transportation and smooth process of the material, and the key parameters in the conveying process, such as conveying speed and conveying volume, are recorded and monitored in real time.

[0095] Example 3

[0096] See also Figure 1 , Figure 2 and Figure 3 , an embodiment provided by the present invention: a device for separating impurities from NdFeB rare earth permanent magnet materials, wherein the quality inspection module is used to inspect the quality of the NdFeB rare earth permanent magnet materials after being processed by the magnetic impurity separation module and the non-magnetic impurity separation module;

[0097] The magnetic impurity separation module is used to separate the magnetic impurities in the NdFeB rare earth permanent magnet material. The magnetic impurity separation module is connected to the quality inspection module through a transmission pipeline;

[0098] The magnetic impurity separation module includes: a magnetic separation unit, an iron removal unit and a fine magnetic unit;

[0099] The magnetic separation unit uses a high-intensity permanent magnetic separator to effectively separate the magnetic impurities in the NdFeB rare earth permanent magnetic material;

[0100] The iron removal unit uses an electromagnetic iron remover that automatically removes iron filings. It has a timed cleaning function to continuously and efficiently remove iron filings from NdFeB rare earth permanent magnet materials.

[0101] The fine magnetic unit uses a high gradient magnetic separator to finely separate the magnetic impurities in the NdFeB rare earth permanent magnet material;

[0102] Further, first, the NdFeB rare earth permanent magnet material to be processed enters the magnetic separation unit, in which a strong magnetic field is generated by a high-intensity permanent magnetic separator, and the magnetic field strength is adjusted according to product requirements and the magnetic properties of impurities. Magnetic impurities, such as iron and nickel, have certain magnetism and will be adsorbed to the magnet or magnetic pole under the action of the strong magnetic field, while the NdFeB rare earth permanent magnet material is not affected by the magnetic field and is not adsorbed when passing through the magnetic separation unit, so it is separated, and the magnetic impurities adsorbed to the magnet or magnetic pole are collected for subsequent processing or disposal;

[0103] The magnetic impurities collected from the magnetic separation unit enter the iron removal unit. In the iron removal unit, the electromagnetic iron remover that automatically removes iron filings further processes the magnetic impurities, such as removing other impurities or oil stains adhering to the surface of the impurities, to ensure the purity of the magnetic impurities. According to the different characteristics of the magnetic impurities, they can be classified and processed to improve the separation efficiency and purity;

[0104] The NdFeB rare earth permanent magnet material separated by the magnetic separation unit enters the fine magnetic unit. In the fine magnetic unit, the NdFeB rare earth permanent magnet material is finely magnetically treated by adjusting the magnetic field strength and frequency of the high gradient magnetic separator to further improve the magnetic properties and purity of the material. If there are still residual magnetic impurities, the fine magnetic unit can also further separate them to ensure the purity and quality of the final product.

[0105] Example 4

[0106] See also Figure 1 , Figure 2 and Figure 4 , an embodiment provided by the present invention: a device for separating impurities from NdFeB rare earth permanent magnet materials, wherein the non-magnetic impurity separation module is used for separating and removing non-magnetic impurities in NdFeB rare earth permanent magnet materials;

[0107] The non-magnetic impurity separation module includes: a washing unit, a screening unit and a filtering unit. The washing unit is connected to the fine magnetic unit of the magnetic impurity separation module through a pipeline, the washing unit is connected to the screening unit through a discharge pipeline, and the screening unit is connected to the filtering unit through a pipeline;

[0108] The washing unit uses high-efficiency water washing equipment and high-efficiency cleaning agents to wash the NdFeB rare earth permanent magnet materials;

[0109] The screening unit uses multi-level vibrating screening equipment to perform precise screening operations as needed to remove non-magnetic impurities of different particle sizes in the NdFeB rare earth permanent magnet material;

[0110] The filter unit uses a high-precision pressure filter to remove small particles of non-magnetic impurities remaining in the NdFeB rare earth permanent magnet material;

[0111] Furthermore, the NdFeB rare earth permanent magnet material to be processed enters the washing unit, where the material is washed using high-efficiency water washing equipment and washing liquid to remove non-magnetic impurities attached to the surface, such as dust, oil, etc. The washing effect is enhanced by stirring and flushing devices to ensure that the non-magnetic impurities on the surface of the material are thoroughly cleaned, and the used washing liquid is recycled and processed to reduce resource waste and environmental pollution;

[0112] After being processed by the washing unit, the NdFeB rare earth permanent magnet material enters the screening unit. In the screening unit, a multi-level vibration screening device is used to perform particle size screening, classify the material according to the particle size, separate the large particles of non-magnetic impurities, and classify the materials of different particle sizes according to the screening results, and send the materials of different particle sizes to different processing channels;

[0113] The NdFeB rare earth permanent magnet material processed by the screening unit enters the filtering unit. In the filtering unit, the material is filtered by a high-precision pressure filter to remove tiny particles suspended in the liquid and residual non-magnetic impurities. The filtrate is recovered and processed to reduce resource waste and environmental pollution.

[0114] Example 5

[0115] See also Figure 1 , Figure 2 and Figure 6 , an embodiment provided by the present invention: a device for separating impurities from NdFeB rare earth permanent magnet materials, wherein the quality inspection module is connected to a feedback module via a data signal line, and the feedback module is used to record quality inspection information and feed it back to a control system;

[0116] The feedback module includes: a quality problem feedback unit, a feedback analysis and recording unit, and a feedback transmission execution unit;

[0117] The quality problem feedback unit receives the inspection data of the quality inspection module through the data signal line, and transmits the inspection data to the feedback analysis and recording unit through the database;

[0118] The feedback analysis and recording unit performs statistical analysis on the inspection data, analyzes the abnormal data, and transmits the abnormal analysis results and improvement suggestions to the feedback transmission execution unit through the data signal line;

[0119] The feedback transmission execution unit is connected to the magnetic impurity separation module and the non-magnetic impurity separation module through a data signal line, and generates a signal through a PID control algorithm and transmits it to the magnetic impurity separation module and the non-magnetic impurity separation module;

[0120] Furthermore, the quality problem feedback unit receives the inspection data transmitted by the quality inspection module in real time, monitors possible quality problems, and makes preliminary classifications, such as equipment failure, operational errors, and original financial problems;

[0121] The feedback analysis and recording unit will conduct statistical analysis on the inspection data, analyze the abnormal data, and record the problems in the feedback analysis and recording unit, including problem description, occurrence time, impact scope and other information, and further classify and analyze the recorded quality problems, such as the nature of the problem, the degree of impact, the duration, etc., analyze and investigate the causes of the problems, and find out the root causes of the quality problems, which may involve equipment failure, operating procedures, raw material quality and other aspects;

[0122] The feedback transmission execution unit transmits the analyzed quality problem information to the relevant departments or responsible persons, notifies them of the occurrence and impact of the problem, and requires them to take corresponding improvement and corrective measures. At the same time, it generates control adjustment signals through the PID control algorithm and transmits them to the magnetic impurity separation module and the non-magnetic impurity separation module for processing parameter adjustment.

[0123] Working principle: the original mixture containing NdFeB rare earth permanent magnet materials first enters the raw material processing module. The task of the raw material processing module is to perform preliminary processing on the mixture, remove large particles of impurities, filter out fine particles of impurities, and adjust the particle size of the material to make it suitable for subsequent separation processing. The purpose of the raw material processing module is to improve the efficiency and accuracy of the subsequent separation process and ensure that the separated NdFeB rare earth permanent magnet materials are of good quality;

[0124] The pre-treated mixture enters the magnetic impurity separation module. At this stage, the magnetic impurities are separated from the NdFeB rare earth permanent magnet material under the action of a strong magnetic field. Since the magnetic impurities are magnetic, they can be adsorbed and separated by a strong magnetic field, while the NdFeB rare earth permanent magnet material is not affected by the magnetic field and is not adsorbed when passing through the magnetic impurity separation module. Therefore, pure NdFeB rare earth permanent magnet material is separated.

[0125] After the magnetic impurities are separated, the rare earth materials enter the non-magnetic impurity separation module. At this stage, physical and chemical methods including gravity sorting and dissolution separation are used to separate the non-magnetic impurities from the rare earth materials to obtain pure NdFeB rare earth permanent magnet materials.

[0126] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A NdFeB rare earth permanent magnet material impurity separation device, characterized in that: It includes a quality inspection module, which is used to inspect the quality of the impurity separation effect of the NdFeB rare earth permanent magnet material; The quality inspection module includes: a testing unit, a performance testing unit and an appearance inspection unit; The testing unit is equipped with high-precision testing equipment to analyze the chemical composition of the product to ensure that the product meets the standard requirements; The performance testing unit uses a fully automatic magnetic performance tester to measure the magnetic saturation magnetic induction intensity and coercive force index of the product to ensure that the product performance meets the standards; The appearance inspection unit uses a high-definition microscope to inspect the product surface to ensure that the product appearance is intact.

2. The impurity separation device for NdFeB rare earth permanent magnet material according to claim 1, characterized in that: The quality inspection module is connected to a drying processing module via a chain conveyor, and the drying processing module is used to dry the NdFeB rare earth permanent magnet material; The drying processing module includes: a drying unit, a cooling unit and a conveying unit. The drying unit is connected to the cooling unit through a transmission pipeline, and the cooling unit is connected to the chain conveyor loading port in the conveying unit through a feeding pipeline. The drying unit uses a hot air circulation dryer with adjustable temperature and uniform drying characteristics to dry the NdFeB rare earth permanent magnet material after impurities are separated to ensure that the product dryness meets the standard; The cooling unit uses a cooling fan to quickly cool the NdFeB rare earth permanent magnet material to prevent the product from being overheated and affecting its quality. The conveying unit adopts a chain conveyor with stable conveying speed and reliable conveying effect to ensure that the products are smoothly conveyed to the quality inspection module.

3. The impurity separation device for NdFeB rare earth permanent magnet material according to claim 1, characterized in that: The quality inspection module is used to perform quality inspection on the NdFeB rare earth permanent magnet material after being processed by the magnetic impurity separation module and the non-magnetic impurity separation module; The magnetic impurity separation module is used to separate the magnetic impurities in the NdFeB rare earth permanent magnet material. The magnetic impurity separation module is connected to the quality inspection module through a transmission pipeline; The magnetic impurity separation module includes: a magnetic separation unit, an iron removal unit and a fine magnetic unit; The magnetic separation unit uses a high-intensity permanent magnetic separator to effectively separate the magnetic impurities in the NdFeB rare earth permanent magnetic material; The iron removal unit uses an electromagnetic iron remover that automatically removes iron filings. It has a timed cleaning function to continuously and efficiently remove iron filings from NdFeB rare earth permanent magnet materials. The fine magnetic unit uses a high gradient magnetic separator to finely separate the magnetic impurities in NdFeB rare earth permanent magnet materials.

4. The impurity separation device for NdFeB rare earth permanent magnet material according to claim 3, characterized in that: The non-magnetic impurity separation module is used to separate and remove non-magnetic impurities in the NdFeB rare earth permanent magnet material; The non-magnetic impurity separation module includes: a washing unit, a screening unit and a filtering unit. The washing unit is connected to the fine magnetic unit of the magnetic impurity separation module through a pipeline, the washing unit is connected to the screening unit through a discharge pipeline, and the screening unit is connected to the filtering unit through a pipeline; The washing unit uses high-efficiency water washing equipment and high-efficiency cleaning agents to wash the NdFeB rare earth permanent magnet materials; The screening unit uses multi-level vibrating screening equipment to perform precise screening operations as needed to remove non-magnetic impurities of different particle sizes in the NdFeB rare earth permanent magnet material; The filter unit uses a high-precision pressure filter to remove small particles of non-magnetic impurities remaining in the NdFeB rare earth permanent magnet material.

5. The impurity separation device for NdFeB rare earth permanent magnet material according to claim 1, characterized in that: The impurity separation device is also designed with a raw material processing module, which is used to perform pretreatment operations on the NdFeB rare earth permanent magnet material before impurity separation; The raw material processing module includes: a raw material feeding unit, a crushing unit and a screening unit, the raw material feeding unit is connected to the feeding port of the crushing unit through a vibrating feeder, the crushing unit is connected to the screening unit through a pipeline, and the screening unit is connected to the feeding port of the magnetic impurity separation module through a pipeline; The raw material feeding unit uses a vibrating feeder with a stable feeding speed and accurate metering function to transport the raw materials of NdFeB rare earth permanent magnet materials from the storage system to the separation device; The crushing unit uses a jaw crusher with a large crushing ratio and processing capacity, uses raw materials of different particle sizes, and controls the particle size by adjusting the discharge port; The screening unit adopts a multi-level vibrating screener, which adjusts the size of the screen holes according to requirements to separate raw material particles of different sizes.

6. The impurity separation device for NdFeB rare earth permanent magnet material according to claim 1, characterized in that: The quality inspection module is connected to a packaging module through an automated packaging line, and the packaging module is used to package the NdFeB rare earth permanent magnet material after the separation process is completed; The packaging module includes: packaging preparation unit, metering and filling unit and packaging and coding unit; The packaging preparation unit integrates an automatic baler and a weigher to package the quality-inspected NdFeB rare earth permanent magnet materials; The metering and filling unit is equipped with a metering pump for accurate metering and filling, thus avoiding product loss and waste; The packaging and coding unit uses automatic sealing machines and inkjet printers to seal and mark the packaged product packages.

7. The impurity separation device for NdFeB rare earth permanent magnet material according to claim 1, characterized in that: The quality inspection module is connected to a feedback module via a data signal line, and the feedback module is used to record the quality inspection information and feed it back to the control system; The feedback module includes: a quality problem feedback unit, a feedback analysis and recording unit, and a feedback transmission execution unit; The quality problem feedback unit receives the inspection data of the quality inspection module through the data signal line, and transmits the inspection data to the feedback analysis and recording unit through the database; The feedback analysis and recording unit performs statistical analysis on the inspection data, analyzes the abnormal data, and transmits the abnormal analysis results and improvement suggestions to the feedback transmission execution unit through the data signal line; The feedback transmission execution unit is connected with the magnetic impurity separation module and the non-magnetic impurity separation module through a data signal line, and generates a signal through a PID control algorithm and transmits it to the magnetic impurity separation module and the non-magnetic impurity separation module.

8. The impurity separation device for NdFeB rare earth permanent magnet material according to claim 7, characterized in that: The specific formula of the PID control algorithm in the feedback transmission execution unit is as follows: Among them, u(t) is the controller output, that is, the control signal that needs to be applied; e(t) is the error at the current moment, that is, the difference between the set value and the actual value; Kp is the proportional coefficient, which is used to adjust the effect of the proportional part; Ki is the integral coefficient, which is used to adjust the effect of the integral part; Kd is the differential coefficient, which is used to adjust the effect of the differential part.

9. A method for using a NdFeB rare earth permanent magnet material impurity separation device, applicable to a NdFeB rare earth permanent magnet material impurity separation device according to any one of claims 1 to 8, characterized in that: The method of use comprises the following steps: S1. Feed pretreatment: introducing the original mixture containing NdFeB rare earth permanent magnet material into the raw material pretreatment module through the raw material feeding unit; S2. Magnetic impurity separation: The pre-treated mixture enters the magnetic impurity separation module, where the magnetic impurities are separated from the NdFeB rare earth permanent magnet material under the action of a strong magnetic field. The magnetic impurities are adsorbed on the magnet while the rare earth material passes through. S3, non-magnetic impurity separation: the rare earth material after magnetic impurity separation enters the non-magnetic impurity separation module, in which the non-magnetic impurities are separated by physical and chemical methods; S4. Quality inspection feedback: After separation, the materials enter the quality inspection module, which performs quality inspection on the materials and transmits the inspection result data to the feedback module.

10. The method for using the NdFeB rare earth permanent magnet material impurity separation device according to claim 9, characterized in that: The method of use also includes the following steps: S11, using a crushing unit and a screening unit in a feed pretreatment module to perform preliminary processing to remove large particle impurities, filter impurities and adjust the particle size of the material; S21, at the same time, the material after impurity separation is dried by a drying module; S41. When the quality inspection is qualified, the materials are packaged and marked through the packaging module; S42. When the quality inspection fails, the feedback module generates a control adjustment signal based on the abnormal data analysis and transmits it to the control systems of the magnetic impurity separation module and the non-magnetic impurity separation module for feedback adjustment and optimization control.

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