A high-intensity magnetic separator suitable for small-scale high-purity materials

Abstract

The present invention discloses a high-intensity magnetic separator suitable for small-scale, high-purity materials. The separator comprises a separation chamber pipe, the bottom of which is supported by a bottom bracket, the separation chamber pipe being a column-type pipe, a filter bag being provided at the bottom of the separation chamber pipe for filtering and collecting the ore pulp after the separation process is completed, an annular electromagnetic-permanent magnetic field generator being installed on the outer wall of the middle portion of the separation chamber pipe, and a metal screen being provided inside the middle portion of the separation chamber pipe, on which paramagnetic iron balls are placed. The present invention provides a paramagnetic screen area composed of high-purity paramagnetic metal balls and a metal gate within the separation chamber pipe, so that when the material flows through the separation chamber, the magnetically selected materials are effectively intercepted and separated. The composite force field composed of magnetism, friction, buoyancy, etc. is formed in combination with the liquid environment within the guide pipe, thereby effectively separating the weakly magnetically selected materials and achieving a separation efficiency within the range of a high-intensity magnetic separator.

Description

Technical Field

[0001] The invention relates to a preparation technology of mineral magnetic separation equipment, in particular to a high-intensity magnetic separator suitable for small-scale high-purity materials, which is used for separating and enriching magnetic and non-magnetic substances from target materials. Background Art

[0002] In the field of mineral processing, magnetic separation is a highly effective method for separating magnetic and non-magnetic minerals. Therefore, in actual production, a large number of small and medium-sized magnetic separators based on this principle are used, including wet drum magnetic separators, permanent magnet roller magnetic separators, and magnetic separator tubes. Magnetic separators can be categorized into high-strength and low-strength magnetic separators based on their magnetic field strength and selectivity. High-strength magnetic separators are particularly effective for separating weakly magnetically selected minerals, but their implementation is limited by the power and magnetic field strength of the permanent magnets. This makes it difficult to implement high-strength magnetic separators in small and medium-sized equipment, making it difficult for small-scale laboratory-scale magnetic separators, such as magnetic separator tubes, to separate weakly magnetically selected minerals from non-magnetic minerals. Furthermore, permanent magnet roller magnetic separators, which occupy a relatively large footprint, require the material being separated to maintain a relatively large particle size. This results in poor separation performance for materials with a high degree of intercalation, where individual particles cannot be separated at large particle sizes. High-gradient magnetic separators, with their high magnetic field strength, have complex structures due to their separation chambers located within the high-gradient magnetic field. This makes complete cleaning difficult during actual use, and the separators are prone to carryover residual materials from previous uses, making it difficult to separate high-purity materials. Consequently, there is currently no pilot-scale high-purity strong magnetic separator that can simultaneously separate minerals with weak magnetic separation, occupy a small footprint, and require low power, while also being suitable for high-purity material separation. Summary of the Invention

[0003] The purpose of the present invention is to solve at least one of the above-mentioned problems existing in the prior art, and to achieve magnetic separation of high-purity materials at a small test scale.

[0004] In order to achieve the above object, the present invention provides a high-intensity magnetic separator suitable for small-scale high-purity materials, comprising a separation chamber pipe, the bottom of which is supported by a bottom bracket, the separation chamber pipe being a column-type pipe, and a filter bag being provided at the bottom of the separation chamber pipe for filtering and collecting the slurry after the separation process is completed;

[0005] An annular electromagnetic-permanent magnetic field generating device is installed on the outer wall of the middle part of the separation cavity pipe, and a metal screen is arranged inside the middle part of the separation cavity pipe, and a paramagnetic iron ball is placed on the metal screen.

[0006] An adapter flange is provided under the filter bag in the separation chamber pipeline for connecting to a circulating water pump so that the liquid medium after filtration can be circulated through the circulating water pump and pipeline.

[0007] The electromagnetic-permanent magnetic field generating device comprises two layers of electromagnets, an upper layer and an lower layer, with a layer of permanent magnets in the middle.

[0008] The bottom pipe of the separation cavity pipe is provided with an external thread pipe for connecting with the internal thread pipe, and the filter bag is arranged in the internal thread pipe; the bottom of the internal thread pipe is connected to the adapter flange.

[0009] The high-purity paramagnetic metal spheres and the metal gate mesh constitute a paramagnetic screen area. The size of the metal spheres inside can be adjusted. The range of the metal spheres is 1-10 mm, and the corresponding separation particle size range is 500-40 mesh.

[0010] In summary, this application has at least one of the following beneficial effects:

[0011] 1. The vertical support structure greatly reduces the footprint of the magnetic separator, allowing it to be used for small-scale material experiments on a conventional laboratory-sized table.

[0012] 2. The electromagnetic-permanent magnetic composite pole is used to achieve the adjustability of the magnetic separator strength, and the magnetization of the electromagnetic device makes the permanent magnetic pole part obtain a longer service life.

[0013] 3. By setting a paramagnetic screen area composed of high-purity paramagnetic metal balls and metal gate mesh in the separation cavity pipeline, the magnetic separation materials can be effectively intercepted and separated when the material flows through the separation cavity. Combined with the liquid environment in the guide pipe, a composite force field composed of magnetism, friction, buoyancy, etc. is formed, thereby achieving effective separation of weak magnetic separation materials and making its separation efficiency reach the range of strong magnetic separator. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 Schematic diagram of the overall structure of the present invention

[0015] Figure 2 Schematic diagram of the structure of the separation cavity of the present invention

[0016] Figure 3 Schematic diagram of the bottom structure of the separation chamber of the present invention

[0017] Figure 4 Schematic diagram of the sorting principle in the sorting cavity of the present invention

[0018] Explanation of the reference numerals: 1 power supply, 2 stepless knob rheostat, 3 electromagnetic-permanent magnetic field generating device, 4 paramagnetic iron ball, 5 filter bag, 6 sorting chamber pipe, 7 circulating water pump, 8 bottom bracket, 3-1 electromagnet, 3-2 permanent magnet, 4-1 metal screen, 6-2 sorting chamber bottom, 6-3 sorting chamber external wire pipe, 6-4 sorting chamber internal wire pipe, 6-5 adapter flange. DETAILED DESCRIPTION

[0019] Hereinafter, a small-scale magnetic separator for high-purity materials and a preparation method thereof of the present invention will be described in detail with reference to the accompanying drawings and exemplary embodiments.

[0020] The embodiment of the present application discloses a magnetic separator, including a power supply 1, a stepless knob rheostat 2, an electromagnetic-permanent magnetic field generating device 3, a paramagnetic iron ball 4, a filter bag 5, a separation cavity pipe 6, a circulating water pump 7, and a bottom bracket 8. The overall structure can be referred to Figure 1 The bottom of the separation chamber pipe 6 is supported by a bottom bracket 8. The separation chamber pipe 6 is a column-type pipe as a whole. A filter bag 5 is provided at the lower part of the separation chamber pipe 6 for filtering and collecting the slurry after the separation process is completed. A platform is provided on the outer wall of the middle part of the separation chamber pipe 6 for placing the annular electromagnetic-permanent magnetic field generating device 3. A metal screen 4-1 is provided inside the middle part of the separation chamber pipe 6. The size of the metal screen 4-1 ranges from 500 to 40 meshes and is used to provide support for the paramagnetic iron balls 4. An adapter flange 6-5 is provided below the filter bag 5 of the separation chamber pipe 6 for connecting a circulating water pump 7, so that the liquid medium after filtration is circulated through the circulating water pump and the pipe.

[0021] refer to Figure 2 A supporting platform is provided on the outer wall of the middle part of the separation chamber pipe 6 to provide support for the electromagnetic-permanent magnetic field generating device 3. The electromagnetic-permanent magnetic field generating device 3 is composed of two layers of electromagnets 3-1 and a layer of permanent magnets 3-2 sandwiched between them. A metal screen 4-1 is provided inside the supporting platform to support the paramagnetic iron ball 4 in the separation chamber.

[0022] refer to Figure 3 The bottom pipe of the sorting cavity pipe 6 is provided with an external threaded pipe 6-3, which is used to connect with the internal threaded pipe 6-4. The filter bag 5 is arranged in the internal threaded pipe 6-4. The connection between the external threaded pipe 6-3 and the internal threaded pipe 6-4 can place the filter bag 5 through thread engagement, so as to realize the rapid disassembly and assembly of the filter bag and the collection of materials.

[0023] refer to Figure 3 The bottom of the internal threaded pipe 6-4 is connected to the adapter flange 6-5, which is convenient for connection with the pipeline of the circulating water pump. The bottom interface of the adapter flange 6-5 is a pagoda-shaped interface with good air tightness. After controlling the water level height in the selection chamber, the stable control circulation of the liquid level in the chamber can be achieved.

[0024] refer to Figure 4, in the magnetic screen area formed by the paramagnetic iron balls 4 in the separation chamber pipe 6, when the electromagnetic-permanent magnetic field generating device 3 is turned on and the water level in the separation chamber pipe 6 is higher than the metal screen 4-1 area, the magnetically separated materials will be affected by the magnetic attraction from the paramagnetic iron balls 4 and the external magnetic field, the buoyancy from the water and the friction generated by the contact with the paramagnetic iron balls 4 when passing through the tortuous screen hole channel formed by the paramagnetic iron balls 4, so that the magnetically separated materials will stay on the metal screen 4-1.

[0025] refer to Figure 4 When the electromagnetic-permanent magnetic field generating device 3 is turned off, the magnetically separated material will be washed away by the water flow and captured in the filter bag 5 area.

[0026] A method for manufacturing a magnetic separator for small-scale high-purity materials, the method comprising the following steps:

[0027] The bottom bracket 8 is a triangular vertical base that forms the base of the magnetic separator. The triangular vertical base supports the entire magnetic separator and leaves space for operation on the front.

[0028] Optionally, the bottom bracket 8 is a hollow columnar pipe and its guide channel constitutes a material sorting cavity pipe 6, the direction of the sorting cavity pipe 6 is vertical to the table, and the material of the sorting cavity pipe 6 can be selected between transparent glass, transparent organic glass and plastic according to experimental requirements or material requirements.

[0029] Optionally, a table for placing the electromagnetic-permanent magnetic field generating device 3 is reserved on the outer wall of the middle portion of the separation cavity pipe 6 .

[0030] Optionally, the electromagnetic-permanent magnetic field generating device 3 is composed of a middle permanent magnet 3-2 and an outer electromagnet 3-1, and relies on an electromagnetic control device to adjust the magnetic field strength. The transformer power supply and the stepless speed change switch composite circuit constitute the electromagnetic control device, which is convenient for converting household 220V AC power into a safer and more applicable 12~24V DC power supply, and combined with the stepless knob switch to adjust the magnetic field strength, which is convenient for controlling the magnetic field strength.

[0031] Optionally, the electromagnetic-permanent magnetic field generating device 3 is combined with a built-in ammeter to display the actual power of the electromagnetic-permanent magnetic field generating device 3 in real time.

[0032] Optionally, the interior of the electromagnetic-permanent magnetic field generating device 3 is a separation cavity pipe 6, and the interior of the separation cavity pipe 6 is a paramagnetic screen area composed of high-purity paramagnetic iron balls 4 and metal screen 4-1. This area can be magnetized by the electromagnetic generating device and converted into a magnetic screen, so that the gaps formed by the accumulation of particles inside the area are densely covered with magnetic fields, thereby effectively intercepting and separating the magnetically selected materials. Combined with the liquid environment in the guide pipe, a composite force field composed of magnetism, friction, buoyancy, etc. is formed, thereby effectively separating the weakly magnetically selected materials.

[0033] The PP material pipe and the circulating water pump 7 constitute a liquid circulation device, and the detachable pipe and the built-in filter bag constitute a material collection device.

[0034] refer to Figure 1 The circuit part belongs to the existing technology and will not be described in detail.

[0035] Example 1

[0036] A quartz sample was ground to 100-200 mesh for magnetic separation. The inner diameter of the magnetic separator was 50 mm, the particle size of the paramagnetic iron balls used was 2 mm, and the magnetic field strength was 14000 Gs.

[0037] The detection of various impurity elements in the K1 quartz sample ore is shown in Table 1 below:

[0038] Sample name Al Ca Cr Cu Fe K Li Na Mg Mn Ni P Ti Total K1 178.380 91.215 3.614 1.400 506.711 45.266 1.575 45.534 42.484 14.714 192.489 149.794 13.455 1286.63

[0039] The Fe content of the quartz concentrate after separation was tested to be 24.6 ppm, and the iron removal rate could reach 95.15%.

[0040] Example 2

[0041] A quartz sample was ground to 100-200 mesh for magnetic separation. The inner diameter of the magnetic separator was 50 mm, the particle size of the paramagnetic iron balls used was 2 mm, and the magnetic field strength was 12000 Gs.

[0042] The impurity elements detected in the G1 quartz sample ore are shown in Table 2 below:

[0043] Sample name Al Ca Cr Cu Fe K Li Na Mg Mn Ni P Ti Total G1 234.625 1245.02 6.398 2.691 397.205 83.276 9.338 105.493 102.746 19.667 377.012 155.726 17.912 2757.11

[0044] The Fe content of the quartz concentrate after separation was tested to be 37.41 ppm, and the iron removal rate could reach 89.37%.

Claims

1. A high-intensity magnetic separator suitable for small-scale high-purity materials, characterized in that: The separation chamber pipeline (6) comprises a separation chamber pipeline (6), the bottom of the separation chamber pipeline (6) is supported by a bottom bracket (8), the separation chamber pipeline (6) is a column-type pipeline, and a filter bag (5) is provided at the bottom of the separation chamber pipeline (6) for filtering and collecting the slurry after the separation process is completed; An annular electromagnetic-permanent magnetic field generating device (3) is installed on the outer wall of the middle part of the separation cavity pipe (6), a metal screen (4-1) is provided inside the middle part of the separation cavity pipe (6), and a paramagnetic iron ball (4) is placed on the metal screen (4-1); The separation chamber pipeline (6) is provided with an adapter flange (6-5) below the filter bag (5) for connecting to a circulating water pump (7), so that the liquid medium after filtration is circulated through the circulating water pump and the pipeline; The electromagnetic-permanent magnetic field generating device (3) comprises two layers of electromagnets (3-1), an upper layer and an lower layer, with a layer of permanent magnets (3-2) sandwiched between them.

2. A high-intensity magnetic separator suitable for small-scale high-purity materials according to claim 1, characterized in that: The bottom pipe of the separation cavity pipe (6) is provided with an external threaded pipe (6-3) for connecting with the internal threaded pipe (6-4), and the filter bag (5) is arranged in the internal threaded pipe (6-4); the bottom of the internal threaded pipe (6-4) is connected to the adapter flange (6-5).

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