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Basic dataStandard ID: GB/T 38947-2020 (GB/T38947-2020)Description (Translated English): Magnetic flux density test method for magnetic separators Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: D96 Classification of International Standard: 17.220.20 Word Count Estimation: 14,139 Date of Issue: 2020-06-02 Date of Implementation: 2021-04-01 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 38947-2020: Magnetic flux density test method for magnetic separators---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.Magnetic flux density test method for magnetic separators ICS 17.220.20 D96 National Standards of People's Republic of China Magnetic induction intensity detection method of magnetic separation equipment 2020-06-02 released Implementation on 2021-04-01 State Administration for Market Regulation Issued by the National Standardization Management Committee Table of contentsForeword Ⅰ 1 Scope 1 2 Terms and definitions 1 3 Category 2 4 Testing equipment and scope 2 5 Detection method 2 Appendix A (Normative Appendix) Magnetic induction intensity detection method of open gradient magnetic separation equipment 3 Appendix B (Normative Appendix) Magnetic induction intensity detection method of closed gradient magnetic separation equipment 6 Appendix C (Normative Appendix) Magnetic induction intensity detection method for multi-gradient magnetic separation equipment 9ForewordThis standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard was proposed by China Machinery Industry Federation. This standard is under the jurisdiction of the National Magnetic Materials and Equipment Standardization Working Group (SWG12). Drafting organizations of this standard. Changsha Research Institute of Mining and Metallurgy Co., Ltd., National Magnetic Equipment Quality Supervision and Inspection Center, Foshan Gaomingxing Yuan Machinery Co., Ltd., Panzhihua Changsen Magnetoelectric Technology Co., Ltd., Weifang Xinli Superconducting Magnetoelectric Technology Co., Ltd., Hunan Hechuang Magnetoelectricity Branch Technology Co., Ltd. The main drafters of this standard. Zhang Guowang, Yang Zhiyuan, Cui Lei, Luo Hao, Wang Zhaolian, Xiao Wenchang. Magnetic induction intensity detection method of magnetic separation equipment1 ScopeThis standard specifies the classification of magnetic separation equipment, the magnetic induction intensity testing instrument and scope of magnetic separation equipment, and the testing method. This standard applies to the following magnetic separation equipment testing methods for magnetic induction. a) Open gradient magnetic separation equipment; b) Closed gradient magnetic separation equipment; c) Multi-gradient magnetic separation equipment.2 Terms and definitionsThe following terms and definitions apply to this document. 2.1 Magnetic separation equipment Technical equipment that uses magnetic force to separate mixtures with different specific magnetic susceptibility. 2.1.1 Open gradient magnetic separation equipment The natural magnetic field gradient is formed by the working distance of the magnetic source (electromagnet or permanent magnet), or by the permanent magnet system of alternating polarity or electromagnetic magnet It is a magnetic separation equipment that forms a magnetic field gradient in the separation zone. 2.1.2 Closed gradient magnetic separation equipment A magnetic separation device that uses permanent magnets or electromagnet pole pairs to properly deform a magnetic pole head to generate a magnetic field gradient. 2.1.3 Multi-gradient magnetic separation equipment A magnetic separation device with multi-gradient magnetic force is generated by using a magnetic concentrating medium arranged in a cavity composed of a permanent magnetic system or an electromagnetic magnetic system. 2.2 Magnetic induction A physical quantity (vector) that indicates the strength and direction of the magnetic field. Note. Magnetic induction is also called magnetic flux density or magnetic flux density, and the unit is T. 2.3 Magnetic flux leakage induction When the magnetic source generates magnetic force in the sorting area, it leaks the magnetic force in the relevant auxiliary parts and the work area or maintenance area. 2.4 Background magnetic induction The magnetic induction intensity when there is no magnetizing medium in the separation area of the magnetic separation equipment. 2.5 Sorting area The selected materials are divided into separate spaces for magnetic and non-magnetic materials. 2.6 Magnetic media Tooth-shaped, round, grid or fibrous ferromagnetic filling made of magnetically conductive materials.3 categories3.1 Open gradient magnetic separation equipment Open gradient magnetic separation equipment mainly includes flat magnetic separators, drum magnetic separators, roller belt magnetic separators, permanent magnet magnets, permanent magnets Strip, grid type permanent magnet magnetic separation device, suspended electromagnetic or permanent magnet magnetic separation device, channel type permanent magnet magnetic separation device, pipeline type permanent magnet magnetic separation device and slippery Slot plate type permanent magnet magnetic separator. 3.2 Closed gradient magnetic separation equipment Closed gradient magnetic separation equipment mainly includes electromagnetic induction roller magnetic separator, electromagnetic induction disc magnetic separator and cross-belt electromagnetic (permanent magnet) magnetic Choose machine. 3.3 Multi-gradient magnetic separator Multi-gradient magnetic separators mainly include flat ring media magnetic separators, vertical ring media magnetic separators and tank media magnetic separators.4 Testing equipment and scope4.1 Testing equipment The detection of magnetic induction intensity of magnetic separation equipment should adopt one-dimensional or three-dimensional magnetometer and three-dimensional fluxgate magnetometer. 4.1.1 Magnetic induction intensity detection in the sorting area When the magnetic induction intensity of the sorting area is tested, a one-dimensional or three-dimensional magnetometer should be used, and the detection accuracy level is 1.0. 4.1.2 Detection of magnetic flux leakage induction in the working range of the whole machine When detecting the magnetic flux leakage induction intensity of the working range of the whole machine, a three-dimensional magnetometer or a three-dimensional fluxgate magnetometer should be used. The detection accuracy level is 0.5 level. 4.2 Detection range The magnetic induction intensity detection range of magnetic separation equipment includes. sorting area, main components, operation space and maintenance space.5 Detection method5.1 Open gradient magnetic separation equipment The magnetic induction intensity detection method of the open gradient magnetic separation equipment should meet the requirements of Appendix A. 5.2 Closed gradient magnetic separation equipment The magnetic induction intensity detection method of closed gradient magnetic separation equipment should meet the requirements of Appendix B. 5.3 Multi-gradient magnetic separation equipment The magnetic induction intensity detection method of multi-gradient magnetic separation equipment should meet the requirements of Appendix C.Appendix A(Normative appendix) Magnetic induction intensity detection method of open gradient magnetic separation equipment A.1 Plate type permanent magnet magnetic separator A.1.1 Magnetic induction intensity detection in the sorting area The magnetic induction intensity detection of the sorting area should be based on the surface of the sorting belt above the plane permanent magnet system, and use a one-dimensional or three-dimensional Hall probe along its belt. The sorting length (X), sorting width (Y) and sorting depth (Z) on the test points of each section of the surface are tested, and the test value should be measured in the perpendicular magnetic system (each The maximum value (mT) of the magnetic flux density in each direction of the (magnetic pole) surface is expressed. The schematic diagram of detection is shown in Figure A.1. Figure A.1 Schematic diagram of magnetic flux density detection of flat-plate permanent magnetic separator A.1.2 Test of magnetic flux leakage induction intensity of the whole machine The magnetic flux leakage induction intensity detection of the whole machine should adopt the three-dimensional Hall probe to the magnetic flux leakage inductance of the feeding box, rinsing tube, discharge hopper, frame and related parts The intensity should be tested. The magnetic flux leakage induction intensity of each component and the whole machine in the operating space and maintenance space should not exceed 10mT, 3m outside the area The magnetic flux leakage induction intensity of the domain should not exceed 0.5mT. A.1.3 Magnetic technical parameters The magnetic technical parameter should be the magnetic induction intensity (mT) of the magnetic separation surface of the equipment, and the magnetic induction at one or more places in the separation area can be used. Intensity expression should not be expressed by theoretical or estimated values. A.2 Magnetic rods and magnetic plates Permanent magnet magnet bar, permanent magnet magnet strip, permanent magnet magnetic grid, suspended electromagnetic or permanent magnet magnetic separator and chute plate permanent magnet magnetic separator The detection of the magnetic induction intensity of the sorting area and the magnetic flux leakage induction of the whole machine can be carried out according to the regulations of A.1.1~A.1.3. A.3 Cylindrical permanent magnet magnetic separator A.3.1 Magnetic induction intensity detection of the sorting cylinder A.3.1.1 The magnetic induction intensity test of the sorting cylinder should be based on the surface of the magnetic cylinder, and the separation width (axis To X), the sorting length (arc length Y), and the sorting depth (Z) detection points for detection, and the value adopts the detection points of the perpendicular magnetic system (each magnetic pole). The maximum magnetic induction intensity (mT) in the middle is indicated. The dry magnetic cylinder should deal with the surface magnetic induction intensity and a certain depth (related to the sorting particle size) The magnetic induction intensity is tested; in addition to detecting the magnetic induction intensity of the surface, the wet magnetic cylinder should also detect the magnetic induction at a depth of 50mm Response intensity, the detection value is expressed by the maximum magnetic induction intensity (mT) in each direction. The schematic diagram of detection is shown in Figure A.2 and Figure A.3. Figure A.2 Schematic diagram of magnetic flux density detection of dry-process barrel structure Figure A.3 Schematic diagram of magnetic flux density detection of wet-process barrel structure A.3.1.2 For the magnetic induction intensity at any specific depth, one-dimensional or three-dimensional magnetometers can be used for detection, and the detection value adopts all-directional magnetic The maximum induction intensity (mT) is expressed. A.3.1.3 The magnetic induction intensity of each magnetic pole can be measured by one-dimensional or three-dimensional Hall probes with the center point of the sorting cylinder as the axis continuously or in sections. Perform detection, the magnetic induction intensity of the magnetic poles in the 100mm section close to both ends should not be within the weighted calculated value range. A.3.2 Whole machine leakage magnetic flux induction intensity detection When testing the magnetic flux leakage induction intensity of the feeding box, unloading pipe, sorting cylinder end cover, rotating shaft, discharge box and frame and other related auxiliary facilities, The three-dimensional Hall probe is used for detection, and the magnetic flux leakage induction value should meet the requirements of A.1.2. A.3.3 Magnetic technical parameters The magnetic technical parameter value (mT) should meet the requirements of A.1.3. A.4 Inner cylinder magnetic separator The detection of the magnetic induction intensity of the separation zone of the inner cylinder magnetic separator and the magnetic flux leakage induction of the whole machine can be carried out according to the provisions of A.3.1~A.3.3. A.5 Roller Permanent Magnetic Separator A.5.1 Magnetic induction intensity detection in the sorting area The magnetic induction intensity detection of the sorting area should be based on the surface of the sorting belt wound on the magnetic roller, and a one-dimensional or three-dimensional Hall probe The upper sorting belt is continuously tested along the axial (X), radial (Y) and depth (Z) magnetic poles one by one, and its value should be the highest magnetic induction intensity in each direction. Large value (mT) said. The first magnetic pole and the last magnetic pole on the magnetic roller belt should not be in the average calculation range. The schematic diagram of detection is shown in Figure A.4. Figure A.4 Schematic diagram of magnetic induction intensity detection of roller permanent magnetic separator A.5.2 Test of magnetic flux leakage induction intensity of the whole machine When testing the magnetic flux leakage induction intensity of the feeding box, magnetic roller end cover, rotating shaft, discharge box and frame, the three-dimensional Huo The magnetic flux leakage induction intensity value should meet the requirements of A.1.2 for detection by the Er probe. A.5.3 Magnetic technical parameters The magnetic technical parameter value (mT) should meet the requirements of A.1.3. A.6 Channel iron removal device The detection of the magnetic induction intensity of the channel type permanent magnet magnetic separator and the pipeline type permanent magnetic magnetic separator and the magnetic flux induction intensity of the whole machine can be The provisions of A.5.1~A.5.3 shall be implemented.Appendix B(Normative appendix) Magnetic induction intensity detection method of closed gradient magnetic separation equipment B.1 Induction disc electromagnetic magnetic separator B.1.1 Magnetic induction intensity detection in the sorting area The magnetic induction intensity detection of the sorting area should be based on the tip of the electromagnetic induction disk or the surface of the conveyor belt, and use one-dimensional or three-dimensional Hall detection Head along the disc tip (X) for detection, and its value should be expressed in terms of the maximum magnetic induction intensity (mT) in each direction. The schematic diagram of detection is shown in Figure B.1. Figure B.1 Schematic diagram of magnetic induction intensity detection of electromagnetic induction disc magnetic separator B.1.2 Test of magnetic flux leakage induction of the whole machine When testing the magnetic flux leakage induction intensity of the feeding device, conveyor belt roller, discharge hopper and rack and other related auxiliary facilities, three-dimensional Huo The magnetic flux leakage induction intensity value should meet the requirements of A.1.2 for detection by the Er probe. B.1.3 Magnetic technical parameters The magnetic technical parameter value (mT) should meet the requirements of A.1.3. B.2 Electromagnetic induction roller magnetic separator B.2.1 Magnetic induction intensity detection in the sorting area The magnetic induction intensity detection of the sorting area should be based on the tooth tip edge of the induction magnetic roller, and a one-dimensional or three-dimensional Hall probe should be used to detect the magnetic roller. The sorting width (X), each magnetic pole gear (arc length Y) is tested by its magnetic depth (Z), and its value should be the maximum magnetic induction intensity in each direction Value (mT) said. The magnetic flux density of the first tooth point and the last tooth point should not be within the weighted calculation range. See the detection diagram Figure B.2. B.2.2 Whole machine leakage magnetic flux induction intensity detection When testing the magnetic flux leakage induction intensity of the feeding device, magnetic roller support mechanism, discharge hopper and rack and other related auxiliary facilities, three-dimensional For Hall probe detection, the flux leakage induction intensity value should meet the requirements of A.1.2. Figure B.2 Schematic diagram of magnetic induction intensity detection of electromagnetic induction roller magnetic separator B.2.3 Magnetic technical parameters The magnetic technical parameter value (mT) should meet the requirements of A.1.3. B.3 Electromagnetic induction cross-belt magnetic separator B.3.1 Magnetic induction intensity detection in the sorting area The magnetic induction intensity detection of the sorting area should be based on the surface of the sorting tape on the wrapping induction pole head, and a one-dimensional or three-dimensional Hall probe The separation width (X) and separation length (Y) of the tape surface under the electromagnetic pole head are tested for magnetic force surface and separation depth (Z). It should be expressed in terms of the maximum magnetic induction intensity (mT) in each direction. The first magnetization point and the last magnetization point on the separation belt should not be within the calculated value range. Surrounding. The schematic diagram of detection is shown in Figure B.3. Figure B.3 Schematic diagram of magnetic induction intensity detection of cross-belt magnetic separator B.3.2 Test of magnetic flux leakage induction intensity of the whole machine When testing the magnetic flux leakage induction intensity of the feeding device, belt roller, discharge hopper and rack and other related auxiliary facilities, the three-dimensional Hall should be used. For probe detection, the flux leakage induction value should meet the requirements of A.1.2. B.3.3 Magnetic technical parameters The magnetic technical parameter value (mT) should meet the requirements of A.1.3.Appendix C(Normative appendix) Method for detecting magnetic induction intensity of multi-gradient magnetic separation equipment C.1 Flat ring media multi-gradient magnetic separator C.1.1 Continuous detection of magnetic induction intensity of magnetic medium in the sorting area The magnetic induction intensity detection of the sorting area should be based on the tooth tip of the magnetic gathering gear plate medium stack in the sorting area, and a one-dimensional or three-dimensional Hall probe The component selection box and the magnetic gathering gear plate media stack are carried out continuously, and the detection depth is the middle part, and the detection value should be the maximum magnetic induction intensity in each direction (mT) means. The schematic diagram of detection is shown in Figure C.1. C.1.2 Intermittent detection of magnetic induction intensity of magnetic medium in the sorting area One-dimensional or three-dimensional Hall probes should be used to lay out the magnetic media (tooth plates), and the dots should be tested according to the specifications. The maximum magnetic induction intensity (mT) indicates. Figure C.1 Schematic diagram of the magnetic field intensity detection point of the toothed plate magnetic gathering medium stack C.1.3 Magnetic induction intensity detection in unloading area The tooth tip of the magnetic gathering gear plate medium stack in the unloading area should be used as a reference, and a one-dimensional or three-dimensional Hall probe should be inserted into the middle of the magnetic gathering gear plate for continuous feeding The detection value should be expressed by the maximum magnetic induction intensity (mT) in each direction, where the leakage magnetic induction or residual magnetic induction ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 38947-2020_English be delivered?Answer: Upon your order, we will start to translate GB/T 38947-2020_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. 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