Pulse magnetic separation equipment for leucite minerals and application method of pulse magnetic separation equipment

Abstract

The invention discloses pulse magnetic separation equipment for leucite minerals and an application method of the pulse magnetic separation equipment, and relates to the technical field of leucite mineral magnetic separation. The upper end of a conveying element is used for conveying the leucite minerals to be subjected to magnetic separation, and in the conveying direction of the conveying element, a first magnetic separator is located behind a second magnetic separator; the first magnetic separator is used for adsorbing strong magnetic minerals in the granitic minerals on the conveying element and collecting the strong magnetic minerals in the first collecting element, and the second magnetic separator is used for adsorbing weak magnetic minerals in the granitic minerals on the conveying element and collecting the weak magnetic minerals in the second collecting element; the tailing collecting element is used for collecting remaining non-magnetic minerals in the granite minerals, the pulse power source is electrically connected with the second magnetic separator, and the pulse power source and the second magnetic separator are both electrically connected with the control element. According to the invention, components with different magnetic properties in the grandite mineral can be respectively collected, and meanwhile, the magnetic field parameters can be adjusted in real time, so that the magnetic separation effect of the grandite mineral is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of magnetic separation of eclogite minerals, in particular to a pulse magnetic separation device for eclogite minerals and an application method thereof. Background Art

[0002] As an important industrial raw material, the sorting process of eclogite minerals needs to efficiently separate the magnetic and non-magnetic components in the minerals based on their differences.

[0003] Existing magnetic separation equipment usually uses a single permanent magnet roller or electromagnetic roller. However, this structure is difficult to adapt to the coexistence of strong and weak magnetic minerals in eclogite minerals, resulting in a high tailings grade. In addition, the generation of a continuous electromagnetic field requires a continuous high current, which consumes a lot of energy. Moreover, it is impossible to adjust the magnetic field parameters in real time according to the mineral particle size and magnetic differences. The sorting accuracy is limited by the fixed magnetic field strength. Summary of the Invention

[0004] The purpose of the present invention is to provide a pulse magnetic separation device for eclogite minerals and an application method thereof, so as to solve the problems existing in the above-mentioned prior art and realize the separate collection of different magnetic components in eclogite minerals. At the same time, it can also adjust the magnetic field parameters in real time, thereby improving the magnetic separation effect of eclogite minerals.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] The present invention provides a pulse magnetic separation device for eclogite minerals, comprising a conveying element, a first magnetic separator, a second magnetic separator, a pulse power supply, a control element, a first collecting element, a second collecting element and a tailings collecting element. The upper end of the conveying element is used to convey the eclogite mineral to be magnetically separated. In the conveying direction of the conveying element, the first magnetic separator is located behind the second magnetic separator. The first magnetic separator is used to adsorb the strongly magnetic minerals in the eclogite minerals on the conveying element and collect the strongly magnetic minerals in the first collecting element. The second magnetic separator is used to adsorb the weakly magnetic minerals in the eclogite minerals on the conveying element and collect the weakly magnetic minerals in the second collecting element. The tailings collecting element is used to collect the remaining non-magnetic minerals in the eclogite minerals. The pulse power supply is electrically connected to the second magnetic separator, and the pulse power supply and the second magnetic separator are both electrically connected to the control element.

[0007] Preferably, it further includes a stand, the first magnetic separator is installed on the stand, and the first magnetic separator is located above the conveying element, and the second magnetic separator is placed below the conveying element.

[0008] Preferably, the first magnetic separator is a crawler magnetic separator, and the crawler magnetic separator includes a crawler, a conveying motor, a transmission element, a magnetic element, a bracket, an active conveying roller, a driven conveying roller and a plurality of hanging ears, the bracket is located in the crawler, and the active conveying roller and the driven conveying roller are respectively supported at both ends of the crawler, the active conveying roller is connected to the conveying motor through the transmission element, the magnetic element is installed at the middle lower end of the bracket, and the magnetic element is located in the crawler, the conveying element is located below the crawler, the magnetic element is used to adsorb the strong magnetic minerals on the conveying element to the crawler, and the crawler drives the strong magnetic minerals to move to the first collecting element, and the first collecting element is arranged to avoid the magnetic element, and a number of the hanging ears are installed on each side of the bracket, and a plurality of pull rods are provided on the inner top surface of the stand, and the plurality of pull rods correspond one to one to the plurality of hanging ears, and the upper end of the pull rod is installed on the stand, and the lower end of the pull rod is connected to the hanging ear.

[0009] Preferably, the first collecting element is located below the crawler and on one side of the crawler. An inclined flow channel is provided at the upper end of the first collecting element. The upper end of the flow channel extends in a direction close to the magnetic element, and the ferromagnetic minerals on the crawler can enter the first collecting element through the flow channel when they move away from the magnetic element. The first collecting element is a collecting box, and the magnetic element is a permanent magnet array or an electromagnet.

[0010] Preferably, the second magnetic separator is an electromagnetic magnetic separator, which includes an electromagnetic magnetic roller, a scraper, a baffle plate, a slip ring assembly and a drive motor. One end of the electromagnetic magnetic roller is connected to the pulse power supply through a slip ring assembly, and the other end of the electromagnetic magnetic roller is connected to the drive motor. The electromagnetic magnetic roller is used to adsorb weakly magnetic minerals. The baffle plate is located on one side of the upper end of the electromagnetic magnetic roller, and there is a tail gap between the baffle plate and the outer wall of the electromagnetic magnetic roller for non-magnetic minerals to pass through. The scraper is located at the lower end of the electromagnetic magnetic roller, and the scraper is used to scrape off the weakly magnetic minerals adsorbed on the surface of the electromagnetic magnetic roller, and the angle of the scraper can be adjusted.

[0011] Preferably, the second collecting element and the tailing collecting element are both located below the electromagnetic magnetic roller, and the scraper is arranged between the second collecting element and the tailing collecting element, the scraper is made of polytetrafluoroethylene material, and the tailing collecting element is arranged below the baffle plate. When the electromagnetic magnetic roller rotates, it can drive the weakly magnetic minerals to move toward the direction close to the second collecting element, and fall into the second collecting element under the action of the scraper, and the non-magnetic minerals fall into the tailing collecting element through the tailing gap. The second collecting element is a magnetic material bin, and the tailing collecting element is a tailing bin.

[0012] Preferably, the inlet end of the electromagnetic magnetic roller is located at the end of the conveying element, and a material guide plate is provided between the inlet end of the electromagnetic magnetic roller and the end of the conveying element, the material guide plate is arranged at an angle, and the end of the material guide plate close to the conveying element is higher than the end of the material guide plate close to the electromagnetic magnetic roller, the surface of the material guide plate is provided with a ceramic lining, the conveying element is a conveyor belt, and the surface of the conveyor belt is provided with a polyurethane wear-resistant layer.

[0013] Preferably, the control element is electrically connected to the encoder of the drive motor and is used to monitor the rotational speed of the electromagnetic magnetic roller. The second collecting element and the tail material collecting element are both provided with weight sensors, and the weight sensors are electrically connected to the control element. The control element can automatically adjust the current frequency and duty cycle of the pulse power supply according to the weight ratio of the materials in the second collecting element and the tail material collecting element.

[0014] The present invention also provides an application method of the pulse magnetic separation device for eclogite minerals based on any one of the above technical solutions, comprising the following steps:

[0015] S1. The crushed eclogite mineral is evenly laid on the conveying element, and the conveying motor of the conveying element and the first magnetic separator is started;

[0016] S2. When the crushed eclogite minerals are transported by the conveyor element to the bottom of the magnetic element of the first magnetic separator, the ferromagnetic minerals are attracted to the lower surface of the first magnetic separator's crawler belt. They then move along the crawler belt to an area where they are free from the magnetic element. Due to inertia and gravity, the ferromagnetic minerals fall into the first collecting element.

[0017] S3. The remaining tailings continue to be transported along the conveying element and reach the second magnetic separator. The pulse power supply is activated and a periodic pulse current is applied to the electromagnetic roller of the second magnetic separator. At the same time, the drive motor of the second magnetic separator drives the electromagnetic roller to rotate.

[0018] S4. Under the action of the pulsed magnetic field, weakly magnetic minerals are attracted to the surface of the electromagnetic roller and rotated with the electromagnetic roller to the scraper of the second magnetic separator, where they are stripped into the second collection element. Non-magnetic minerals fall directly into the tailings collection element.

[0019] S5. Adjust the duty cycle of the pulse current and dynamically change the magnetic induction intensity on the surface of the electromagnetic roller to enhance the separation effect of weakly magnetic minerals.

[0020] Preferably, in S5, the duty cycle of the pulse current is 30%-70%, and the magnetic induction intensity on the surface of the electromagnetic roller changes dynamically within the range of 0.5-1.2T; and, S5 also includes online monitoring: the TiO2 content in the second collecting element is detected in real time by an X-ray fluorescence spectrometer. When the TiO2 content is lower than 85wt%, the pulse current frequency of the pulse power supply is synchronously increased by 5Hz-10Hz, and the duty cycle is increased by 10%-15%.

[0021] Compared with the prior art, the present invention has achieved the following technical effects:

[0022] The pulse magnetic separation equipment for eclogite minerals provided by the present invention and the application method thereof include a conveying element, a first magnetic separator, a second magnetic separator, a pulse power supply, a control element, a first collecting element, a second collecting element and a tailings collecting element. The upper end of the conveying element is used to convey the eclogite mineral to be magnetically separated. In the conveying direction of the conveying element, the first magnetic separator is located behind the second magnetic separator. Then, when the first magnetic separator and the second magnetic separator are used to magnetically separate the eclogite minerals on the conveying element, the first magnetic separator is first magnetically separated, and the second magnetic separator further magnetically separates the remaining materials after magnetic separation by the first magnetic separator. The first magnetic separator is used to adsorb the strongly magnetic minerals in the eclogite minerals on the conveying element, and collect the strongly magnetic minerals in the first collecting element, giving priority to adsorbing the strongly magnetic minerals to reduce the subsequent processing of the second magnetic separator. load, the second magnetic separator is used to adsorb the weakly magnetic minerals in the eclogite minerals on the conveying element, and collect the weakly magnetic minerals in the second collecting element, and the tailings collecting element is used to collect the remaining non-magnetic minerals in the eclogite minerals, so as to realize the separate magnetic separation and separate collection of the strong magnetic minerals, weakly magnetic minerals and non-magnetic minerals in the eclogite minerals, realize the precise magnetic separation of the eclogite minerals, and improve the magnetic separation effect. The pulse power supply is electrically connected to the second magnetic separator, and the pulse power supply and the second magnetic separator are both electrically connected to the control element. The second magnetic separator is driven by the pulse power supply to generate a dynamic magnetic field. Combined with the duty cycle adjustment, the weakly magnetic minerals are efficiently adsorbed in the pulse magnetic field. The pulse current duty cycle is negatively correlated with the rotational speed of the second magnetic separator to realize real-time adaptation of the magnetic field intensity and the conveying speed of the eclogite minerals, thereby improving the magnetic separation effect of the eclogite minerals. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 This is a front view of the pulse magnetic separation equipment for eclogite minerals in Example 1;

[0025] Figure 2 Schematic diagram of the structure of the first magnetic separator in Example 1;

[0026] Figure 3 is a top view of the second magnetic separator in Example 1;

[0027] Figure 4 A top view of the conveying element and the second magnetic separator in the first embodiment;

[0028] In the figure: 1-pull rod, 2-first magnetic separator, 21-crawler, 22-conveying motor, 23-hanging ear, 24-magnetic element, 25-bracket, 26-active conveying roller, 3-conveyor belt, 4-guide plate, 5-pulse power supply, 6-second magnetic separator, 61-electromagnetic magnetic roller, 62-scraper, 63-blocking plate, 64-slip ring assembly, 65-drive motor, 7-first collecting element, 8-flow channel, 9-stand. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0030] The purpose of the present invention is to provide a pulse magnetic separation device for eclogite minerals and an application method thereof, so as to solve the problems existing in the prior art and realize the separate collection of different magnetic components in eclogite minerals. At the same time, it is also possible to adjust the magnetic field parameters in real time, thereby improving the magnetic separation effect of eclogite minerals.

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] Example 1

[0033] like Figure 1-Figure 4As shown, this embodiment provides a pulse magnetic separation device for eclogite minerals, including a conveying element, a first magnetic separator 2, a second magnetic separator 6, a pulse power supply 5, a control element, a first collecting element 7, a second collecting element and a tailings collecting element. The upper end of the conveying element is used to convey the eclogite mineral to be magnetically separated. In the conveying direction of the conveying element, the first magnetic separator 2 is located behind the second magnetic separator 6. Then, when the first magnetic separator 2 and the second magnetic separator 6 are used to magnetically separate the eclogite minerals on the conveying element, the first magnetic separator 2 is first magnetically separated, and the second magnetic separator 6 further magnetically separates the remaining materials after magnetic separation by the first magnetic separator 2. The first magnetic separator 2 is used to adsorb the strongly magnetic minerals in the eclogite minerals on the conveying element, and collect the strongly magnetic minerals in the first collecting element 7, giving priority to adsorbing the strongly magnetic minerals to reduce the subsequent second magnetic separator 6. The processing load of the second magnetic separator 6 is used to adsorb the weak magnetic minerals in the eclogite minerals on the conveying element, and collect the weak magnetic minerals in the second collecting element, and the tailings collecting element is used to collect the remaining non-magnetic minerals in the eclogite minerals, so as to realize the separate magnetic separation and separate collection of the strong magnetic minerals, weak magnetic minerals and non-magnetic minerals in the eclogite minerals, realize the precise magnetic separation of the eclogite minerals, and improve the magnetic separation effect. The pulse power supply 5 is electrically connected to the second magnetic separator 6, and the pulse power supply 5 and the second magnetic separator 6 are both electrically connected to the control element. The second magnetic separator 6 is driven by the pulse power supply 5 to generate a dynamic magnetic field. Combined with the duty cycle adjustment, the weak magnetic minerals are efficiently adsorbed in the pulse magnetic field. The pulse current duty cycle is negatively correlated with the rotational speed of the second magnetic separator 6 to realize real-time adaptation of the magnetic field intensity and the eclogite mineral conveying speed, thereby improving the magnetic separation effect of the eclogite minerals.

[0034] Specifically, the pulse magnetic separation equipment for eclogite minerals in this embodiment also includes a stand 9, the first magnetic separator 2 is installed on the stand 9, and the first magnetic separator 2 is located above the conveying element, and the second magnetic separator 6 is placed below the conveying element.

[0035] The first magnetic separator 2 is a crawler magnetic separator, and the crawler magnetic separator includes a crawler 21, a conveying motor 22, a transmission element, a magnetic element 24, a bracket 25, an active conveying roller 26, a driven conveying roller and a plurality of hanging ears 23. The bracket 25 is located in the crawler 21, and the active conveying roller 26 and the driven conveying roller are respectively supported at both ends of the crawler 21. The active conveying roller 26 is connected to the conveying motor 22 through a transmission element. The transmission element is preferably a gear reducer. The magnetic element 24 is installed at the lower middle end of the bracket 25, and the magnetic element 24 is located in the crawler 21. The conveying element is located below the crawler 21. Preferably, the vertical spacing between the magnetic element 24 and the conveying element is 5cm-15cm. The magnetic element 24 is used to adsorb the strong magnetic minerals on the conveying element. To the crawler 21, and the crawler 21 drives the ferromagnetic mineral to move to the first collecting element 7, and the first collecting element 7 is set to avoid the magnetic attraction element 24, so that the ferromagnetic mineral gradually moves away from the magnetic attraction element 24 under the drive of the crawler 21, and the magnetic field strength gradually weakens, which makes it easier for the ferromagnetic mineral to break away from the crawler 21 and enter the first collecting element 7 under the action of inertia and its own gravity. A number of hanging ears 23 are installed on both sides of the bracket 25, and a plurality of pull rods 1 are provided on the inner top surface of the stand 9. The plurality of pull rods 1 and the plurality of hanging ears 23 correspond one to one, and the upper end of the pull rod 1 is installed on the stand 9, and the lower end of the pull rod 1 is connected to the hanging ear 23, thereby realizing the suspension of the first magnetic separator 2 on the stand 9 to ensure that it can adsorb the ferromagnetic minerals on the conveying element.

[0036] In this embodiment, the active conveying roller 26 is made of a seamless steel pipe with a hard chrome-plated surface, and high-precision bearings are installed at both ends. It is driven by the conveying motor 22 through a gear reducer. The power of the conveying motor 22 is dynamically matched according to the load of the crawler 21 to ensure smooth operation. The conveying motor 22 is equipped with a frequency converter, which can achieve stepless speed regulation of 0.5m / s-2m / s to meet different feeding requirements.

[0037] The first collecting element 7 is located below and to one side of the track 21. An inclined flow channel 8 is provided at the upper end of the first collecting element 7. The flow channel 8 is mounted on a stand 9. The upper end of the flow channel 8 extends toward the magnetic element 24. When strongly magnetic minerals on the track 21 move away from the magnetic element 24, they can enter the first collecting element 7 through the flow channel 8. Preferably, to ensure efficient collection of strongly magnetic minerals, the lower end of the flow channel 8 can extend into the interior of the first collecting element 7. The first collecting element 7 is a collection box, and the magnetic element 24 is a permanent magnet array or an electromagnet. The permanent magnets are made of neodymium iron boron (NdFeB) with a magnetic energy product of ≥35 MGOe. The magnetic poles are arranged at an angle of 45°-90° with the direction of travel of the track 21, forming a transverse gradient magnetic field that enhances the attraction of weakly magnetic minerals. The electromagnet is composed of an iron core made of laminated silicon steel sheets and an enameled wire winding. The magnetic field strength can be varied by adjusting the excitation current to accommodate the separation requirements of different magnetic minerals.

[0038] The second magnetic separator 6 is an electromagnetic magnetic separator, which includes an electromagnetic magnetic roller 61, a scraper 62, a baffle plate 63, a slip ring assembly 64 and a drive motor 65. One end of the electromagnetic magnetic roller 61 is connected to the pulse power supply 5 through the slip ring assembly 64. The slip ring assembly 64 adopts precious metal contacts to ensure the stability and reliability of high current transmission. The other end of the electromagnetic magnetic roller 61 is connected to the drive motor 65. The electromagnetic magnetic roller 61 is used to adsorb weakly magnetic minerals. The baffle plate 63 is located on one side of the upper end of the electromagnetic magnetic roller 61, and there is a tail gap between the baffle plate 63 and the outer wall of the electromagnetic magnetic roller 61 for non-magnetic minerals to pass through. The scraper 62 is located at the lower end of the electromagnetic magnetic roller 61, and the scraper 62 is used to scrape off the weakly magnetic minerals adsorbed on the surface of the electromagnetic magnetic roller 61, and the angle of the scraper 62 can be adjusted. The adjustable range of the installation angle of the scraper 62 is preferably 15°-30°.

[0039] In this embodiment, a shell can be provided on the outer periphery of the second magnetic separator 6, and a feed port is provided at the upper end of the shell, which can be used for the eclogite mineral to enter the second magnetic separator 6; for the setting of the baffle plate 63, the baffle plate 63 is preferably fixed by a mounting plate, and the mounting plate is mounted on the inner wall of the shell, and the fixing bolt hole on the mounting plate for fixing the baffle plate 63 is a waist-shaped hole, which facilitates the adjustment of the tail material gap (that is, the gap between the baffle plate 63 and the roller surface of the electromagnetic magnetic roller 61, this gap is used for the non-magnetic minerals that are not magnetically attracted to pass through), and the mounting plate and the baffle plate 63 can be rotatably connected, and the installation angle of the baffle plate 63 can also be adjusted; an auxiliary baffle is also installed on the inner bottom surface of the shell, the auxiliary baffle is located above the electromagnetic magnetic roller 61, and can cooperate with the baffle plate 63 to receive the material transported by the conveying element.

[0040] The second collecting element and the tailing collecting element are both located below the electromagnetic magnetic roller 61, and the scraper 62 is arranged between the second collecting element and the tailing collecting element. The scraper 62 is made of polytetrafluoroethylene material, and the gap between the blade edge of the scraper 62 and the surface of the electromagnetic magnetic roller 61 is 0.1mm-0.5mm. While ensuring that the weak magnetic minerals can be scraped off, it also avoids affecting the rotation of the electromagnetic magnetic roller 61 and causing damage to the electromagnetic magnetic roller 61. The tailing collecting element is arranged below the corresponding baffle plate 63. When the electromagnetic magnetic roller 61 rotates, it can drive the weak magnetic minerals to move toward the direction close to the second collecting element, and fall into the second collecting element under the action of the scraper 62, and the non-magnetic minerals fall into the tailing collecting element through the tailing gap. The second collecting element is a magnetic material bin, and the tailing collecting element is a tailing bin. Figure 1 As shown, the tail material bin is located on the left side of the scraper 62, and the magnetic material bin is located on the right side of the scraper 62.

[0041] The inlet end of the electromagnetic magnetic roller 61 is located at the end of the conveying element, and a material guide plate 4 is provided between the inlet end of the electromagnetic magnetic roller 61 and the end of the conveying element. The material guide plate 4 is tilted, and the material guide plate 4 is higher at the end close to the conveying element than the material guide plate 4 at the end close to the electromagnetic magnetic roller 61. The surface of the material guide plate 4 is provided with a ceramic lining, and the inclination angle of the material guide plate 4 is preferably 25°-40°. The distance between the outlet of the material guide plate 4 and the inlet of the second magnetic separator 6 is preferably 5cm-10cm; the conveying element is a conveyor belt 3, and the surface of the conveyor belt 3 is provided with a polyurethane wear-resistant layer. The running speed of the conveyor belt 3 is 0.5m / s-1.2m / s, and the linear speed difference between the conveyor belt 3 and the crawler 21 is controlled within ±10%.

[0042] Preferably, in this embodiment, the electromagnetic roller 61 has a hollow shaft structure. An electromagnetic coil is mounted within the roller 61. The electromagnetic coil is wound with high-temperature-resistant enameled wire and is wrapped with an insulating layer and a magnetically conductive stainless steel sleeve. The roller surface of the electromagnetic roller 61 is polished to reduce material adhesion.

[0043] The control element is preferably a programmable logic controller (PLC) with integrated data acquisition, logic control, and parameter adjustment functions. The control element is electrically connected to the encoder of the drive motor 65 via a data cable and is used to monitor the speed of the electromagnetic roller 61. When the speed fluctuates, the control element automatically adjusts the input voltage or frequency of the drive motor 65 to maintain the speed within a set range. This allows the frequency of the pulse current provided by the pulse power supply 5 to be dynamically adjusted based on the real-time speed of the electromagnetic roller 61, with a duty cycle adjustment accuracy of ±2%. Weight sensors are installed in both the second collection element and the tailings collection element. The weight sensors are electrically connected to the control element, and the control element automatically adjusts the current frequency and duty cycle of the pulse power supply 5 based on the weight ratio of the materials in the second collection element and the tailings collection element. The feedback adjustment response time is ≤0.5 seconds. A material detection sensor is installed on the side wall of the discharge chamber of the electromagnetic separator, and its signal is connected to the control element.

[0044] Preferably, the pulse waveform output by the pulse power supply 5 is a rectangular or trapezoidal wave, and within a single pulse cycle, it contains one to three peak pulses with an amplitude of 1.2 to 1.8 times the baseline current, with the peak pulse duration accounting for 5% to 15% of the single cycle. When the weight of the material adsorbed on the surface of the electromagnetic magnetic roller 61 drops to 60% of the set threshold, the control element determines that the current sorting load is low and automatically reduces the pulse current frequency to 50% to 70% of the baseline value, reducing energy consumption while maintaining sufficient magnetic field strength to maintain the sorting effect. In this embodiment, the pulse current frequency output by the pulse power supply 5 is 10 Hz to 50 Hz, and the duty cycle is adjustable.

[0045] The pulsed magnetic separation equipment for eclogite in this embodiment uses magnetic field differences to separate minerals. After the eclogite is crushed to a particle size of ≤3mm, it is uniformly transported by conveyor belt 3 to the bottom of the first magnetic separator 2. Strongly magnetic minerals are attracted to the lower surface of track 21 by the constant magnetic field of magnetic element 24. After moving along track 21 until they are free from the magnetic field of magnetic element 24, they fall into flow channel 8 under the influence of inertia and gravity and are collected in first collecting element 7, completing the rough separation of the eclogite. The remaining tailings from the rough separation pass through guide plate 4 and enter the second magnetic separator 6. A pulsed power supply 5 applies periodic pulsed current to the electromagnetic roller 61, generating a dynamically changing pulsed magnetic field. The alternating attraction and repulsion of the pulsed magnetic field attracts weakly magnetic minerals to the roller surface of electromagnetic roller 61, where they rotate and are then stripped by scraper 62 into the magnetic material bin. Non-magnetic minerals fall directly into the tailings bin, achieving fine separation. The whole process achieves the goal of low energy consumption and high efficiency sorting by controlling the frequency, duty cycle and rotation speed of the electromagnetic magnetic roller 61 of the pulse current and dynamically adjusting the parameters in combination with the mineral particle size.

[0046] Example 2

[0047] This embodiment provides an application method of the pulse magnetic separation device for eclogite minerals based on the first embodiment, comprising the following steps:

[0048] S1. The crushed eclogite mineral (particle size ≤ 3 mm) is evenly laid on the conveying element, and the conveying element and the conveying motor 22 of the first magnetic separator 2 are started; wherein, for the crushing of the eclogite mineral, a combined crushing process of a jaw crusher and a cone crusher can be adopted to ensure that the eclogite ore can be crushed to a particle size ≤ 3 mm. During the crushing process, a vibrating screen is set to perform particle size screening, and unqualified coarse particles are returned to the crusher for re-crushing. The crushed mineral is transported to the feeding hopper of the equipment via a belt conveyor. An electromagnetic vibrating feeder is installed below the feeding hopper to evenly and stably lay the material on the conveyor belt 3. The laying thickness is adjusted by the amplitude of the feeder and is generally controlled at 10 mm to 30 mm.

[0049] As a preference, the conveying element and the conveying motor 22 of the first magnetic separator 2 can also be started first, and the material can be added after the equipment is running stably. The running speed of the conveying element can be adjusted according to the feed amount, generally 0.8m / s-1.0m / s, to ensure uniform material transportation;

[0050] S2. When the crushed eclogite minerals are transported by the conveyor element to the bottom of the magnetic element 24 of the first magnetic separator 2, the ferromagnetic minerals are attracted to the lower surface of the crawler belt 21 of the first magnetic separator 2 by the magnetic element 24. The ferromagnetic minerals move along the crawler belt 21 to an area where they are free from the magnetic element 24. Under the influence of inertia and gravity, the ferromagnetic minerals fall into the first collecting element 7.

[0051] S3. The remaining tailings continue to be conveyed by the conveying element and reach the second magnetic separator 6. The pulse power supply 5 is activated and a periodic pulse current is applied to the electromagnetic roller 61 of the second magnetic separator 6. Simultaneously, the drive motor 65 of the second magnetic separator 6 drives the electromagnetic roller 61 to rotate at a speed of 20 rpm to 60 rpm. The duty cycle of the pulse power supply 5 can be initially set to 50% and subsequently dynamically adjusted based on the material inspection results.

[0052] S4. Under the action of the pulsed magnetic field, weakly magnetic minerals are attracted to the surface of the electromagnetic roller 61 and rotate with the electromagnetic roller 61 to the scraper 62 of the second magnetic separator 6 to be stripped into the second collection element. Non-magnetic minerals fall directly into the tailings collection element;

[0053] S5. Adjust the duty cycle of the pulse current and dynamically change the magnetic induction intensity on the surface of the electromagnetic roller 61 to enhance the separation effect of weakly magnetic minerals.

[0054] Specifically, in S5, the duty cycle of the pulse current is 30%-70%, and the surface magnetic induction intensity of the electromagnetic roller 61 changes dynamically within the range of 0.5-1.2T; and, S5 also includes online monitoring: the TiO2 content in the second collecting element is detected in real time by an X-ray fluorescence spectrometer. When the TiO2 content is lower than 85wt%, the pulse current frequency of the pulse power supply 5 is synchronously increased by 5Hz-10Hz, and the duty cycle is increased by 10%-15%.

[0055] In this embodiment, the adjustment of the pulse current frequency and the duty cycle satisfies the following corresponding relationship:

[0056] When the particle size of eclogite mineral is ≤1mm, the pulse current frequency is 30Hz-50Hz and the duty cycle is 50%-70%;

[0057] When the particle size of the eclogite mineral is 1mm-3mm, the pulse current frequency is 10Hz-30Hz, and the duty cycle is 30%-50%;

[0058] The rotation speed of the electromagnetic magnetic roller 61 is adjusted accordingly: when the particle size of the eclogite mineral is ≤1mm, the rotation speed of the electromagnetic magnetic roller 61 is 40r / min-60r / min; when the particle size of the eclogite mineral is 1mm-3mm, the rotation speed of the electromagnetic magnetic roller 61 is 20r / min-40r / min.

[0059] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A pulse magnetic separation device for eclogite minerals, characterized by: It includes a conveying element, a first magnetic separator, a second magnetic separator, a pulse power supply, a control element, a first collecting element, a second collecting element and a tailing collecting element. The upper end of the conveying element is used to convey the eclogite mineral to be magnetically separated. In the conveying direction of the conveying element, the first magnetic separator is located behind the second magnetic separator. The first magnetic separator is used to adsorb the strong magnetic minerals in the eclogite mineral on the conveying element and collect the strong magnetic minerals in the first collecting element. The second magnetic separator is used to adsorb the weak magnetic minerals in the eclogite mineral on the conveying element and collect the weak magnetic minerals in the second collecting element. The tailing collecting element is used to collect the remaining non-magnetic minerals in the eclogite mineral. The pulse power supply is electrically connected to the second magnetic separator, and the pulse power supply and the second magnetic separator are both electrically connected to the control element.

2. The pulse magnetic separation device for eclogite minerals according to claim 1, characterized in that: It also includes a stand, the first magnetic separator is installed on the stand, and the first magnetic separator is located above the conveying element, and the second magnetic separator is placed below the conveying element.

3. The pulse magnetic separation device for eclogite minerals according to claim 2, characterized in that: The first magnetic separator is a crawler magnetic separator, and the crawler magnetic separator includes a crawler, a conveying motor, a transmission element, a magnetic element, a bracket, an active conveying roller, a driven conveying roller and a plurality of hanging ears. The bracket is located in the crawler, and the active conveying roller and the driven conveying roller are respectively supported at both ends of the crawler, the active conveying roller is connected to the conveying motor through the transmission element, the magnetic element is installed at the middle lower end of the bracket, and the magnetic element is located in the crawler, the conveying element is located below the crawler, the magnetic element is used to adsorb the strong magnetic minerals on the conveying element to the crawler, and enable the crawler to drive the strong magnetic minerals to move to the first collecting element, and the first collecting element is arranged to avoid the magnetic element, and a number of the hanging ears are installed on each side of the bracket, and a plurality of pull rods are provided on the inner top surface of the stand, and the plurality of pull rods correspond one to one to the plurality of hanging ears, and the upper end of the pull rod is installed on the stand, and the lower end of the pull rod is connected to the hanging ear.

4. The pulse magnetic separation device for eclogite minerals according to claim 3, characterized in that: The first collecting element is located below the crawler and on one side of the crawler. An inclined flow channel is provided at the upper end of the first collecting element. The upper end of the flow channel extends in a direction close to the magnetic element. When the ferromagnetic minerals on the crawler move away from the magnetic element, they can enter the first collecting element through the flow channel. The first collecting element is a collection box, and the magnetic element is a permanent magnet array or an electromagnet.

5. The pulse magnetic separation device for eclogite minerals according to claim 2, characterized in that: The second magnetic separator is an electromagnetic magnetic separator, which includes an electromagnetic magnetic roller, a scraper, a baffle plate, a slip ring assembly and a drive motor. One end of the electromagnetic magnetic roller is connected to the pulse power supply through a slip ring assembly, and the other end of the electromagnetic magnetic roller is connected to the drive motor. The electromagnetic magnetic roller is used to adsorb weakly magnetic minerals. The baffle plate is located on one side of the upper end of the electromagnetic magnetic roller, and there is a tail gap between the baffle plate and the outer wall of the electromagnetic magnetic roller for non-magnetic minerals to pass through. The scraper is located at the lower end of the electromagnetic magnetic roller, and the scraper is used to scrape off the weakly magnetic minerals adsorbed on the surface of the electromagnetic magnetic roller, and the angle of the scraper can be adjusted.

6. The pulse magnetic separation device for eclogite minerals according to claim 5, characterized in that: The second collecting element and the tailing collecting element are both located below the electromagnetic magnetic roller, and the scraper is arranged between the second collecting element and the tailing collecting element. The scraper is made of polytetrafluoroethylene material. The tailing collecting element is arranged below the baffle plate. When the electromagnetic magnetic roller rotates, it can drive weakly magnetic minerals to move toward the direction close to the second collecting element, and fall into the second collecting element under the action of the scraper, and non-magnetic minerals fall into the tailing collecting element through the tailing gap. The second collecting element is a magnetic material bin, and the tailing collecting element is a tailing bin.

7. The pulse magnetic separation device for eclogite minerals according to claim 5, characterized in that: The inlet end of the electromagnetic magnetic roller is located at the end of the conveying element, and a material guide plate is provided between the inlet end of the electromagnetic magnetic roller and the end of the conveying element. The material guide plate is arranged at an angle, and the end of the material guide plate close to the conveying element is higher than the end of the material guide plate close to the electromagnetic magnetic roller. A ceramic lining is provided on the surface of the material guide plate, the conveying element is a conveyor belt, and the surface of the conveyor belt is provided with a polyurethane wear-resistant layer.

8. The pulse magnetic separation device for eclogite minerals according to claim 5, characterized in that: The control element is electrically connected to the encoder of the drive motor and is used to monitor the rotational speed of the electromagnetic magnetic roller. The second collecting element and the tail material collecting element are both provided with weight sensors, and the weight sensors are electrically connected to the control element. The control element can automatically adjust the current frequency and duty cycle of the pulse power supply according to the weight ratio of the materials in the second collecting element and the tail material collecting element.

9. An application method of the pulse magnetic separation device for eclogite minerals according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1. The crushed eclogite mineral is evenly laid on the conveying element, and the conveying motor of the conveying element and the first magnetic separator is started; S2. When the crushed eclogite minerals are transported by the conveyor element to the bottom of the magnetic element of the first magnetic separator, the ferromagnetic minerals are attracted to the lower surface of the first magnetic separator's crawler belt. They then move along the crawler belt to an area where they are free from the magnetic element. Due to inertia and gravity, the ferromagnetic minerals fall into the first collecting element. S3. The remaining tailings continue to be transported along the conveying element and reach the second magnetic separator. The pulse power supply is activated and a periodic pulse current is applied to the electromagnetic roller of the second magnetic separator. At the same time, the drive motor of the second magnetic separator drives the electromagnetic roller to rotate. S4. Under the action of the pulsed magnetic field, weakly magnetic minerals are attracted to the surface of the electromagnetic roller and rotated with the electromagnetic roller to the scraper of the second magnetic separator, where they are stripped into the second collection element. Non-magnetic minerals fall directly into the tailings collection element. S5. Adjust the duty cycle of the pulse current and dynamically change the magnetic induction intensity on the surface of the electromagnetic roller to enhance the separation effect of weakly magnetic minerals.

10. The application method of the pulse magnetic separation device for eclogite minerals according to claim 9, characterized in that: In S5, the duty cycle of the pulse current is 30%-70%, and the magnetic induction intensity on the surface of the electromagnetic roller changes dynamically within the range of 0.5-1.2T; In addition, S5 also includes online monitoring: the TiO2 content in the second collecting element is detected in real time by an X-ray fluorescence spectrometer. When the TiO2 content is lower than 85wt%, the pulse current frequency of the pulse power supply is synchronously increased by 5Hz-10Hz, and the duty cycle is increased by 10%-15%.

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