A large electromagnetic slurry magnetic separator

Abstract

The present invention discloses a large-scale electromagnetic slurry magnetic separator, which belongs to the technical field of magnetic separation equipment, and comprises a frame; a magnetic separation assembly comprises a base plate and a plurality of nested positioning cylinders, and magnetic medium is filled between adjacent positioning cylinders; a plurality of first through holes are provided on the base plate; a plurality of second through holes are provided on the circumference of the positioning cylinder; a pre-magnetization cavity extends into the innermost positioning cylinder and is connected to a feed pipe and a water inlet pipe, and a plurality of excitation rings are provided inside the cavity; a driving component can drive the magnetic separation assembly to rotate; the magnetic separation assembly is located in a material cylinder, and a discharge pipe is provided at the bottom of the material cylinder; an excitation coil is arranged around the material cylinder; in the magnetic separation stage, the ore pulp enters the magnetic separation assembly through the pre-magnetization cavity of the present invention, and the excitation ring can magnetize the weak magnetic particles in the ore pulp, and the magnetized weak magnetic particles are more easily adsorbed onto the magnetic medium; in the iron removal stage, the driving component drives the magnetic separation assembly to rotate forward and reverse, and the flushing water can thoroughly clean the magnetic particles adhering to the magnetic medium, and regular disassembly and cleaning are no longer required.

Description

Technical Field

[0001] The present invention relates to the technical field of magnetic separation equipment, in particular to a large-scale electromagnetic slurry magnetic separator. Background Art

[0002] The advantages of electromagnetic slurry magnetic separators for removing iron from fine-grained non-metallic minerals are very obvious, and they can significantly improve the quality of materials. As electromagnetic slurry magnetic separators continue to develop towards large-scale, the requirements for the stability of the equipment's sorting indicators are becoming more and more stringent, and the requirements for equipment operation and maintenance are also becoming higher and higher.

[0003] At present, the magnetic medium of electromagnetic slurry magnetic separator is mainly steel wool medium, diamond mesh medium or rod medium. The magnetic medium is usually placed statically in layers or pieces inside the separation chamber. The slurry passes through the separation chamber under the action of the pump's conveying force and gravity and directly contacts the magnetic medium. Some weak magnetic particles in the slurry are not easy to capture, and as the use time increases, the magnetic medium is prone to mixed materials, resulting in the magnetic separation effect becoming worse and worse with the increase of the magnetic medium's use cycle. In addition, large particles of impurities are mixed in the magnetic medium, which easily leads to magnetic medium blockage. This requires regular removal of the magnetic pole head of the large electromagnetic slurry magnetic separator (the pole weighs about 25 tons), and then taking out the magnetic medium and cleaning it piece by piece before reloading it into the separation chamber. The component disassembly cycle of the large slurry magnetic separator is long, the component lifting is inconvenient, the labor intensity of the workers is very high, and the magnetic medium cleaning requires two days of downtime, which greatly reduces the working efficiency of the large electromagnetic slurry magnetic separator and seriously restricts the popularization and application of large electromagnetic slurry magnetic separator.

[0004] Therefore, the research and development of a large-scale electromagnetic slurry magnetic separator that can effectively improve the capture rate of weakly magnetic particles and can conveniently clean the magnetic medium is a problem that needs to be solved urgently at this stage. Summary of the Invention

[0005] In response to the problems existing in the prior art, the present invention provides a large-scale electromagnetic slurry magnetic separator. During the magnetic separation process, the ore pulp enters the magnetic separation assembly through the pre-magnetization chamber. Under the action of the strong magnetic field generated by the excitation coil, the excitation ring in the pre-magnetization chamber can magnetize the weak magnetic particles in the ore pulp. The ore pulp enters the magnetic separation assembly. The rotation of the magnetic separation assembly can make the ore pulp move radially under the action of centrifugal force. The magnetized weak magnetic particles are more easily adsorbed on the magnetic medium in the magnetic separation assembly, thereby improving the concentrate index; during the iron removal process, the driving component drives the magnetic separation assembly to rotate forward and reverse periodically, and the flushing water can effectively clean the magnetic particles adhering to the magnetic medium under the action of centrifugal force. The magnetic medium will not have problems of entrained material and blockage, and the magnetic medium no longer needs to be disassembled and cleaned regularly, thereby improving work efficiency.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0007] The present invention provides a large-scale electromagnetic slurry magnetic separator, comprising:

[0008] frame;

[0009] A magnetic separation assembly is provided on the frame; the magnetic separation assembly comprises a horizontally arranged bottom plate, on which are provided a plurality of vertically arranged and sequentially nested positioning cylinders, the gaps between adjacent positioning cylinders being filled with magnetic medium; the bottom plate is provided with a plurality of first through holes in the area between adjacent positioning cylinders; and a plurality of second through holes are provided on the circumference of the positioning cylinders;

[0010] a pre-magnetization cavity, one end of which extends into the innermost positioning cylinder, and the other end of which is connected to a feed pipe and a water inlet pipe; a plurality of excitation rings are provided in the pre-magnetization cavity, and the excitation rings are located inside the innermost positioning cylinder;

[0011] A driving assembly, the driving assembly being fixed to the frame and capable of driving the magnetic separation assembly to rotate around the axis of the positioning cylinder located at the innermost layer;

[0012] A material barrel, the material barrel is arranged on the frame, the magnetic separation assembly is located inside the material barrel; a discharge pipe is provided at the bottom of the material barrel;

[0013] An excitation coil is fixed on the frame and arranged around the material barrel.

[0014] As a preferred technical solution, there is a gap between the inner bottom surface of the material barrel and the bottom surface of the bottom plate, a spoiler is provided on the inner bottom surface of the material barrel, the upper surface of the spoiler is set as a conical surface, and corrugated strips are provided on the conical surface.

[0015] As a preferred technical solution, the drive assembly includes a vertically arranged transmission shaft, the upper end of which passes through the material barrel and the spoiler in sequence and is fixedly connected to the base plate, and the lower end of the transmission shaft is connected to a motor that can drive it to rotate.

[0016] As a preferred technical solution, the outer sleeve of the transmission shaft is provided with a sleeve, the sleeve is loosely fitted with the transmission shaft, the upper end of the sleeve is fixedly connected to the bottom surface of the spoiler, and the lower end of the sleeve is fixedly connected to the frame; the upper and lower ends of the sleeve are both rotationally sealed with the transmission shaft; an exhaust port and a refueling port are provided on the sleeve; the refueling port is located at the bottom of the sleeve, and the portion of the transmission shaft located within the sleeve has an external thread.

[0017] As a preferred technical solution, a plurality of vertically arranged ribs are provided on the inner circumference of the material barrel.

[0018] As a preferred technical solution, a cover plate is provided on the upper end of the material barrel, an upper connecting tube is provided on the cover plate, and the pre-magnetization cavity passes through the upper connecting tube and is in clearance fit with the upper connecting tube.

[0019] As a preferred technical solution, the excitation ring includes a plurality of parallel dielectric strips and a plurality of parallel connecting strips, wherein the connecting strips are located below the dielectric strips, the dielectric strips and the connecting strips are arranged perpendicularly and fixedly connected to each other, and both ends of the connecting strips are fixedly connected to the pre-magnetization cavity; the dielectric strips are made of magnetic conductive material, and the connecting strips are made of non-magnetic conductive material;

[0020] And / or, a plurality of the excitation rings are distributed along the extension direction of the pre-magnetization cavity.

[0021] As a preferred technical solution, the base plate and the positioning cylinder are both made of non-magnetic materials;

[0022] And / or, the bottom plate is circular, and the positioning cylinder located on the outermost layer is fixedly connected to the outer edge of the bottom plate;

[0023] And / or, the axes of the plurality of positioning cylinders, the bottom plate, and the pre-magnetization cavity are all collinear;

[0024] And / or, the magnetic medium is set to be a steel wool medium, a diamond mesh medium or a rod-shaped medium.

[0025] As a preferred technical solution, the pre-magnetization chamber is vertically arranged, and the feed pipe and the water inlet pipe are both connected to the upper end of the pre-magnetization chamber;

[0026] And / or, the discharge pipe is arranged vertically, and the lower end of the discharge pipe is provided with a tailings outlet and a concentrate outlet respectively.

[0027] As a preferred technical solution, an upper magnetic pole is provided on the frame at a position corresponding to the position above the material barrel, and the pre-magnetization cavity passes through the upper magnetic pole;

[0028] And / or, a lower magnetic pole is provided on the frame at a position corresponding to below the material barrel, and the discharge pipe passes through the lower magnetic pole.

[0029] The beneficial effects of the present invention are as follows:

[0030] The present invention alternately performs a magnetic separation process and an iron removal process during operation. During the magnetic separation process, the ore pulp enters the magnetic separation assembly through a pre-magnetization cavity. Under the action of a strong magnetic field generated by an excitation coil, an excitation ring in the pre-magnetization cavity can magnetize weak magnetic particles in the ore pulp. The ore pulp enters the magnetic separation assembly. The rotation of the magnetic separation assembly can cause the ore pulp to move radially under the action of centrifugal force. The magnetized weak magnetic particles are more easily adsorbed onto the magnetic medium in the magnetic separation assembly, which can effectively improve the concentrate index. During the iron removal process, the excitation coil is closed, the magnetic medium is demagnetized, and the driving component drives the magnetic separation assembly to rotate forward and reverse periodically. Under the action of centrifugal force, flushing water can effectively clean the magnetic particles adhered to the magnetic medium. The magnetic medium will not have problems of mixed material and blockage. The magnetic medium no longer needs to be disassembled and cleaned regularly. The magnetic separation index is more stable, and the work efficiency is greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of the overall structure of an embodiment of a large-scale electromagnetic slurry magnetic separator of the present invention;

[0032] Figure 2 for Figure 1 Enlarged view of area A in the middle;

[0033] Figure 3 for Figure 1 Schematic diagram of the structure in which the magnetic separation assembly is hidden behind the positioning cylinder located on the outermost layer;

[0034] Figure 4 for Figure 1 Schematic diagram of the structure of the pre-magnetized cavity;

[0035] Figure 5 for Figure 4 Schematic diagram of the structure of the excitation ring;

[0036] Figure 6 for Figure 1 Schematic diagram of the structure of the drive component in;

[0037] Figure 7 for Figure 1 Schematic diagram of the structure of the material barrel.

[0038] In the figure: 1-frame, 11-upper magnetic pole, 12-lower magnetic pole, 2-bottom plate, 21-first through hole, 3-positioning cylinder, 31-second through hole, 4-pre-magnetization cavity, 41-feed pipe, 42-water inlet pipe, 5-excitation ring, 51-dielectric strip, 52-connecting strip, 61-drive shaft, 611-external thread, 62-motor, 7-material barrel, 71-discharge pipe, 711-tailings outlet, 712-concentrate outlet, 72-spoiler, 73-sleeve, 731-exhaust port, 732-fuel filling port, 74-convex rib, 75-cover plate, 76-upper connecting pipe, 8-excitation coil. DETAILED DESCRIPTION

[0039] In order to facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0040] Please refer to Figure 1-Figure 7 , which is an embodiment of a large-scale electromagnetic slurry magnetic separator provided by the present invention, comprising a frame 1; a magnetic separation assembly is arranged on the frame 1; the magnetic separation assembly comprises a horizontally arranged bottom plate 2, on which a plurality of vertically arranged and sequentially nested positioning cylinders 3 are provided, and the gaps between adjacent positioning cylinders 3 are filled with magnetic medium (not shown in the figure); a plurality of first through holes 21 are provided in the area between adjacent positioning cylinders 3 of the bottom plate 2; a plurality of second through holes 31 are provided on the circumferential surface of the positioning cylinder 3; one end of the pre-magnetization cavity 4 extends into the innermost positioning cylinder 3, and the other end of the pre-magnetization cavity 4 is connected to a feed pipe 41 and a water inlet pipe 42; a plurality of excitation rings 5 ​​are provided in the pre-magnetization cavity 4, and the excitation ring 5 is located inside the innermost positioning cylinder 3. The slurry first enters the pre-magnetization cavity 4, and after passing through the excitation ring 5, it can enter the innermost positioning cylinder 3; a driving group The components are fixed on the frame 1, and the driving component can drive the magnetic separation assembly to rotate around the axis of the positioning cylinder 3 located in the innermost layer, and the slurry enters the magnetic separation assembly. The rotation of the magnetic separation assembly can make the slurry move radially under the action of centrifugal force; the material barrel 7 is arranged on the frame 1, and the magnetic separation assembly is located inside the material barrel 7; the bottom of the material barrel 7 is provided with a discharge pipe 71, and the slurry flows into the material barrel 7 after being separated by the magnetic separation assembly and can be discharged from the discharge pipe 71; the excitation coil 8 is fixed on the frame 1 and arranged around the material barrel 7. When the excitation coil 8 is energized, it can generate a strong magnetic field. The strong magnetic field can make the magnetic medium and the excitation ring 5 magnetized, and the magnetic medium can absorb magnetic particles. The excitation ring 5 can increase the background magnetic field strength in the vicinity thereof, thereby improving the magnetization effect on the weak magnetic particles in the slurry. The magnetized weak magnetic particles are more easily adsorbed when they come into contact with the magnetic medium.

[0041] It should be noted that the magnetic lines of force generated by the excitation coil 8 after power is applied should be parallel to the axis of the pre-magnetization cavity 4, and the magnetic medium is preferably set to a steel wool medium, a diamond mesh medium or a rod-shaped medium made of a magnetic conductive material; accordingly, the bottom plate 2 and the positioning cylinder 3 are preferably made of a non-magnetic conductive material; further, a number of positioning cylinders 3 nested in sequence can isolate the magnetic medium and form concentric rings, and the slurry passes through the magnetic medium between the several positioning cylinders 3 from the inside to the outside, which can effectively guide the flow direction of the slurry and facilitate the flushing of the magnetic medium.

[0042] For details, please refer to Figure 3The bottom plate 2 is preferably circular, and the positioning cylinder 3 located on the outermost layer is fixedly connected to the outer edge of the bottom plate 2, so that the appearance of the magnetic separation assembly is simplified. The tailings after sorting flow out from the second through hole 31 on the outermost positioning cylinder 3 and the first through hole 21 on the bottom plate 2, and can directly fall into the material barrel 7, which is convenient for production and processing; further, in order to ensure the stability of the magnetic separation assembly during high-speed rotation, the axes of the positioning cylinders 3, the bottom plate 2, and the pre-magnetization cavity 4 should all be collinear.

[0043] In this embodiment, please refer to Figure 1 、 Figure 2 and Figure 6 There is a gap between the inner bottom surface of the material barrel 7 and the bottom surface of the bottom plate 2. A spoiler 72 is provided on the inner bottom surface of the material barrel 7. The upper surface of the spoiler 72 is set to a conical surface. The discharge pipe 71 is located at the lowest point of the conical surface. After the tailings flowing out of the first through hole 21 fall on the conical surface, they can automatically flow along the conical surface to the discharge pipe 71; further, a plurality of corrugated strips are provided on the conical surface, and the plurality of corrugated strips are distributed along the circumferential direction, and each corrugated strip extends radially. The gas in the gap between the inner bottom surface of the material barrel 7 and the bottom surface of the bottom plate 2 interacts with the corrugated strips when the magnetic separation assembly rotates at high speed, and can generate an increased pressure at the first through hole 21 of the bottom plate 2, thereby generating resistance to the slurry that is about to flow out of the first through hole 21, thereby increasing the residence time of the slurry in the magnetic separation assembly and improving the separation effect.

[0044] Similarly, please refer to Figure 1 、 Figure 2 and Figure 7 The inner circumference of the material barrel 7 is preferably provided with a plurality of vertically arranged ribs 74. When the magnetic separation assembly rotates at a high speed, the ribs 74 interact with the gas between the inner circumference of the material barrel 7 and the outermost positioning barrel 3, and can generate radially inward pressure at the second through hole 31 of the outermost positioning barrel 3, thereby generating resistance to the slurry that is about to flow out of the second through hole 31, and can also increase the residence time of the slurry in the magnetic separation assembly, thereby improving the separation effect.

[0045] Based on the above examples, please refer to Figure 1 、 Figure 2 and Figure 6 The drive assembly includes a vertically arranged transmission shaft 61. The upper end of the transmission shaft 61 passes through the material barrel 7 and the spoiler 72 in sequence and is fixedly connected to the center of the base plate 2. The lower end of the transmission shaft 61 is connected to a motor 62 that can drive it to rotate. The motor 62 is preferably set as a servo motor, which can drive the base plate 2 to rotate forward and reverse through the transmission shaft 61.

[0046] For further information, please refer to Figure 1 、 Figure 2 and Figure 6The outer sleeve 73 of the transmission shaft 61 is provided with a sleeve 73, which is in clearance fit with the transmission shaft 61. The upper end of the sleeve 73 is fixedly connected to the bottom surface of the spoiler 72, and the lower end of the sleeve 73 is fixedly connected to the frame 1; the upper and lower ends of the sleeve 73 are both rotatably sealed with the transmission shaft 61, and the sleeve 73 can effectively protect the transmission shaft 61; an exhaust port 731 and a refueling port 732 are provided on the sleeve 73. The exhaust port 731 can timely discharge the high-pressure gas between the sleeve 73 and the transmission shaft 61, and the refueling port 732 can discharge the high-pressure gas between the sleeve 73 and the transmission shaft 61. 1, so as to improve the lubrication effect; specifically, the oil filling port 732 is located at the bottom of the sleeve 73, which is convenient for injecting butter. At the same time, the portion of the transmission shaft 61 located in the sleeve 73 has an external thread 611. When the transmission shaft 61 rotates, the rotation of the external thread 611 can drive the butter to move upward, so that the butter can fully lubricate the portion of the transmission shaft 61 located inside the sleeve 73; further, the opening of the exhaust port 731 inside the sleeve 73 should be located at the upper end of the sleeve 73, which can effectively prevent the butter from being discharged from the exhaust port 731.

[0047] In this embodiment, please refer to Figure 1 、 Figure 2 and Figure 7 A cover plate 75 is provided at the upper end of the material barrel 7, which blocks the upper end of the material barrel 7 and completely accommodates the magnetic separation assembly inside the material barrel 7 to prevent the tailings flowing out of the magnetic separation assembly from splashing; an upper connecting pipe 76 is provided on the cover plate 75, and the pre-magnetization cavity 4 passes through the upper connecting pipe 76 and is in clearance with the upper connecting pipe 76, which can guide the pre-magnetization cavity 4 while ensuring that the slurry flowing out of the pre-magnetization cavity 4 can all enter the magnetic separation assembly.

[0048] In this embodiment, please refer to Figure 4 and Figure 5 The excitation ring 5 includes a plurality of parallel dielectric strips 51 and a plurality of parallel connecting strips 52. The connecting strips 52 are located below the dielectric strips 51. The dielectric strips 51 and the connecting strips 52 are arranged perpendicularly and fixedly connected to each other. Both ends of the connecting strips 52 are fixedly connected to the pre-magnetization cavity 4, thereby firmly positioning the excitation ring 5 in the pre-magnetization cavity 4. It should be noted that the dielectric strips 51 should be made of a magnetic conductive material, and the connecting strips 52 should be made of a non-magnetic conductive material. In addition, the surface of the dielectric strips 51 is provided with a non-metallic material coating with a thickness of 2-5 mm. While magnetizing the weak magnetic particles in the ore slurry, the weak magnetic particles are prevented from being adsorbed on the dielectric strips 51. The excitation ring 5 can increase the background magnetic field strength in the vicinity thereof by at least 2 times.

[0049] For further information, please refer to Figure 4 and Figure 5 The plurality of excitation rings 5 ​​are preferably distributed along the extension direction of the pre-magnetization cavity 4. The slurry passes through the plurality of excitation rings 5 ​​in sequence, which can improve the magnetization effect on the weak magnetic particles in the slurry.

[0050] In this embodiment, please refer to Figure 1 、 Figure 2 and Figure 4 The pre-magnetization chamber 4 is preferably arranged vertically, and the slurry can flow smoothly along the pre-magnetization chamber 4 under the action of gravity; the feed pipe 41 and the water inlet pipe 42 are both connected to the upper end of the pre-magnetization chamber 4, and the slurry can be injected into the pre-magnetization chamber 4 through the feed pipe 41, and the flushing water can enter the magnetic separation assembly through the pre-magnetization chamber 4 through the water inlet pipe 42.

[0051] Similarly, please refer to Figure 1 、 Figure 2 and Figure 7 The discharge pipe 71 is also preferably arranged vertically, so that the sorted tailings and magnetic particles can be discharged smoothly along the discharge pipe 71; the lower end of the discharge pipe 71 is respectively provided with a tailings outlet 711 and a concentrate outlet 712, the sorted tailings are discharged from the tailings outlet 711, and the magnetic particles are discharged from the concentrate outlet 712.

[0052] For clarification, please refer to Figure 1 , an upper magnetic pole 11 should be provided at a position above the material barrel 7 on the frame 1, and the pre-magnetization cavity 4 passes through the upper magnetic pole 11. When the excitation coil 8 is energized to generate a magnetic field, the part of the pre-magnetization cavity 4 located in the upper magnetic pole 11 will not generate a strong magnetic field, and the magnetic particles in the slurry will not be magnetized, thereby avoiding affecting the flow of the slurry and the subsequent magnetic separation of the magnetic particles; similarly, a lower magnetic pole 12 is provided at a position below the material barrel 7 on the frame 1, and the discharge pipe 71 passes through the lower magnetic pole 12. When the excitation coil 8 is energized to generate a magnetic field, the part of the discharge pipe 71 located in the lower magnetic pole 12 will not generate a strong magnetic field, thereby avoiding affecting the discharge of magnetic particles from the discharge pipe 71.

[0053] Please refer to Figure 1-Figure 7 , the specific workflow of the present invention is as follows:

[0054] During the magnetic separation process, the excitation coil 8 is energized to generate a strong magnetic field, and both the magnetic medium and the excitation ring 5 generate magnetism; the driving component drives the magnetic separation assembly to rotate; the slurry enters the pre-magnetization chamber 4 through the feed pipe 41, and when passing through the excitation ring 5, the excitation ring 5 is in full contact with the slurry to magnetize the weak magnetic particles in the slurry; the slurry falls from the pre-magnetization chamber 4 into the innermost positioning cylinder 3 of the magnetic separation assembly, and under the action of centrifugal force, the slurry moves radially, passes through the second through hole 31 of the innermost positioning cylinder 3 and contacts the magnetic medium, and the magnetic particles are adsorbed on the magnetic medium, and some of the sorted tailings move radially through all the positioning cylinders 3 in turn and are discharged from the magnetic separation assembly from the second through hole 31 of the outermost positioning cylinder 3, and some of the sorted tailings are discharged from the magnetic separation assembly from the first through hole 21 of the bottom plate 2 under the action of gravity; the material cylinder 7 collects the sorted tailings and discharges them from the tailings outlet 711 on the discharge pipe 71;

[0055] After feeding for a period of time, the feed pipe 41 is closed to stop feeding, and the drive assembly stops running. Wait for a period of time until no tailings flow out of the discharge pipe 71, and then the iron removal process can be carried out;

[0056] During the iron removal process, the excitation coil 8 is powered off, and the flushing water enters the magnetic separation assembly through the water inlet pipe 42 and the pre-magnetization chamber 4. The driving component drives the magnetic separation assembly to rotate forward and reverse at high speed. Under the combined action of the flushing water and centrifugal force, all the magnetic particles adhering to the magnetic medium can be flushed down, and flow into the material barrel 7 through the material pipeline and discharged from the concentrate outlet 712; the magnetic medium can be fully cleaned, and there will be no inclusion of material or blockage in the next cycle of magnetic separation; specifically, the speed of the magnetic separation assembly is preferably controlled to be 0-350r / min and the frequency is adjustable, and different speeds can be set according to the slurry.

[0057] It should be noted that the first through holes 21 on the bottom plate 2 can effectively prevent the slurry from remaining at the bottom between the adjacent positioning cylinders 3, thereby effectively avoiding the situation where the magnetic medium is mixed with material or blocked.

[0058] Experimental Example 1

[0059] 30kg 325 mesh kaolin slurry with a concentration of 15% was prepared and divided into two parts for experimental comparison using the same equipment. All mineral processing parameters (background magnetic field 1.5T, feed speed 10mm / s, magnetic medium No. 2 steel wool) were consistent. After the magnetic separation was completed, the concentrate was taken for analysis and the test results are as follows:

[0060]

[0061] Experimental Example 2

[0062] 30kg of 80-mesh feldspar slurry with a concentration of 20% was prepared and divided into two parts for experimental comparison using the same equipment. All beneficiation parameters (background magnetic field 1.0T, feed speed 20mm / s, magnetic medium 4*8 and 6*12 medium mesh) were consistent. After the magnetic separation was completed, the concentrate was taken for analysis and the test results are as follows:

[0063]

[0064] Based on the above experimental examples, the present invention can significantly improve the concentrate indicators of different materials.

[0065] Conventional cleaning means flushing the magnetic medium with only clean water delivered by the pump.

[0066] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A large electromagnetic slurry separator, characterized in that: include: Rack (1); A magnetic separation assembly, the magnetic separation assembly being arranged on the frame (1); the magnetic separation assembly comprising a horizontally arranged bottom plate (2), the bottom plate (2) being provided with a plurality of vertically arranged and sequentially nested positioning cylinders (3), the gaps between adjacent positioning cylinders (3) being filled with magnetic medium; the bottom plate (2) being provided with a plurality of first through holes (21) in the area between adjacent positioning cylinders (3); and a plurality of second through holes (31) being provided on the circumference of the positioning cylinders (3); A pre-magnetization cavity (4), one end of the pre-magnetization cavity (4) extends into the innermost positioning cylinder (3), and the other end of the pre-magnetization cavity (4) is connected to a feed pipe (41) and a water inlet pipe (42); a plurality of excitation rings (5) are provided in the pre-magnetization cavity (4), and the excitation rings (5) are located inside the innermost positioning cylinder (3); A drive assembly, the drive assembly being fixed to the frame (1), and the drive assembly being capable of driving the magnetic separation assembly to rotate around the axis of the positioning cylinder (3) located in the innermost layer; A material barrel (7), the material barrel (7) is arranged on the frame (1), and the magnetic separation assembly is located inside the material barrel (7); a discharge pipe (71) is provided at the bottom of the material barrel (7); a gap is provided between the inner bottom surface of the material barrel (7) and the bottom surface of the bottom plate (2); a spoiler (72) is provided on the inner bottom surface of the material barrel (7), and the upper surface of the spoiler (72) is set as a conical surface, and corrugated strips are provided on the conical surface; An excitation coil (8), wherein the excitation coil (8) is fixed on the frame (1) and is arranged around the material barrel (7).

2. A large electromagnetic slurry separator according to claim 1, characterized in that: The drive assembly comprises a vertically arranged transmission shaft (61), the upper end of the transmission shaft (61) sequentially passing through the material barrel (7) and the spoiler disk (72) and fixedly connected to the base plate (2), and the lower end of the transmission shaft (61) is connected to a motor (62) capable of driving the transmission shaft (61) to rotate.

3. A large electromagnetic slurry separator according to claim 2, characterized in that: The transmission shaft (61) is externally sleeved with a sleeve (73), the sleeve (73) and the transmission shaft (61) are clearance-matched, the upper end of the sleeve (73) is fixedly connected to the bottom surface of the spoiler (72), and the lower end of the sleeve (73) is fixedly connected to the frame (1); the upper and lower ends of the sleeve (73) are both rotationally sealed with the transmission shaft (61); the sleeve (73) is provided with an exhaust port (731) and a refueling port (732); the refueling port (732) is located at the bottom of the sleeve (73), and the portion of the transmission shaft (61) located within the sleeve (73) has an external thread (611).

4. A large electromagnetic slurry separator according to claim 1, characterized in that: A plurality of vertically arranged convex ribs (74) are provided on the inner circumferential surface of the material barrel (7).

5. A large-scale electromagnetic slurry separator according to claim 1, characterized in that: A cover plate (75) is provided at the upper end of the material barrel (7), an upper connecting tube (76) is provided on the cover plate (75), and the pre-magnetization chamber (4) passes through the upper connecting tube (76) and is clearance-fitted with the upper connecting tube (76).

6. A large-scale electromagnetic slurry separator according to claim 1, characterized in that: The excitation ring (5) comprises a plurality of parallel dielectric strips (51) and a plurality of parallel connecting strips (52), wherein the connecting strips (52) are located below the dielectric strips (51), the dielectric strips (51) and the connecting strips (52) are arranged vertically and fixedly connected to each other, and both ends of the connecting strips (52) are fixedly connected to the pre-magnetization cavity (4); the dielectric strips (51) are made of a magnetic conductive material, and the connecting strips (52) are made of a non-magnetic conductive material; And / or, a plurality of the excitation rings (5) are distributed along the extension direction of the pre-magnetization cavity (4).

7. A large-scale electromagnetic slurry separator according to claim 1, characterized in that: The base plate (2) and the positioning cylinder (3) are both made of non-magnetic conductive materials; And / or, the bottom plate (2) is circular, and the positioning cylinder (3) located on the outermost layer is fixedly connected to the outer edge of the bottom plate (2); And / or, the axes of the plurality of positioning cylinders (3), the base plate (2), and the pre-magnetization cavity (4) are all collinear; And / or, the magnetic medium is set to be a steel wool medium, a diamond mesh medium or a rod-shaped medium.

8. A large-scale electromagnetic slurry separator according to claim 1, characterized in that: The pre-magnetization chamber (4) is vertically arranged, and the feed pipe (41) and the water inlet pipe (42) are both connected to the upper end of the pre-magnetization chamber (4); And / or, the discharge pipe (71) is arranged vertically, and the lower end of the discharge pipe (71) is provided with a tailings outlet (711) and a concentrate outlet (712).

9. A large-scale electromagnetic slurry separator according to claim 1, characterized in that: An upper magnetic pole (11) is provided on the frame (1) at a position corresponding to the upper portion of the material barrel (7), and the pre-magnetization cavity (4) passes through the upper magnetic pole (11); And / or, a lower magnetic pole (12) is provided on the frame (1) at a position corresponding to below the material barrel (7), and the discharge pipe (71) passes through the lower magnetic pole (12).

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