Magnetic separator with high mineral collection ability and non-uniform magnetic field gradient

Abstract

The present invention discloses a magnetic separator with a high mineral capture ability and non-uniform magnetic field gradient, which comprises a magnetic separation body, and a feed hopper and a discharge hopper are respectively connected to the top end and the bottom end of the magnetic separation body; a magnetic medium box is arranged inside the magnetic separation body; at least two groups of magnetic media are arranged inside the magnetic medium box, and each group of magnetic media comprises at least four magnetic medium rods; each magnetic medium rod comprises a medium rod and a medium ring spirally arranged on the outer circumference of the medium rod; a cleaning rod is arranged inside the magnetic medium box at each position of each magnetic medium rod. This magnetic separator with a high mineral capture ability and non-uniform magnetic field gradient is provided with a magnetic medium box having magnetic medium rods and cleaning rods inside the magnetic separation body. The special-shaped magnetic medium rods can prolong the flow time of the pulp in the spiral groove of the medium ring, thereby greatly increasing the magnetic induction intensity and strengthening the magnetic field non-uniformity on the surface of the medium, thus effectively increasing the capture area of the medium for minerals and enhancing the capture ability.

Description

Technical Field

[0001] The invention belongs to the technical field of magnetic separators, and in particular relates to a magnetic separator with high mineral capture capacity and non-uniform magnetic field gradient. Background Art

[0002] Magnetic separator is a screening device used to extract magnetic substances from the medium. Magnetic separators are widely used in resource recovery, wood industry, mining industry, kiln industry, chemical industry, food industry and other factories. They are suitable for wet magnetic separation of magnetite, pyrrhotite, roasted ore, ilmenite and other materials with a particle size below 3mm. They are also used for iron removal of coal, non-metallic minerals, building materials and other materials. It is one of the most widely used and versatile machines in the industry. High-gradient magnetic separators place magnetic media in a uniform magnetic field to generate a very high magnetic field gradient to achieve efficient recovery of minerals.

[0003] Most of the existing mineral magnetic separators will choose magnetic media such as steel wool, steel plate mesh, round rods, and toothed plates to improve the capture capacity of minerals, but the magnetic field gradient generated by media such as steel wool and steel plate mesh is very large, and the separation accuracy is low, which can easily cause mechanical inclusions and blockages in the minerals during sorting; the magnetic field gradient generated by the round rod medium is relatively small, so the capture capacity of fine-grained minerals will be poor; and the toothed plate medium has a high filling rate and generates a large magnetic field gradient, but its effective capture area is small, and it is also easier to block when capturing strongly magnetic minerals; therefore, most of the magnetic media of the existing magnetic separators cannot obtain a high capture area and capture capacity in a non-uniform magnetic field gradient, nor can it avoid the blockage of mineral particles, so there are certain defects in use, and there is an urgent need for a magnetic separator with a non-uniform magnetic field gradient and high mineral capture capacity to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to provide a magnetic separator with high mineral capture capacity and non-uniform magnetic field gradient to solve the problems mentioned in the above background technology.

[0005] In order to achieve the above object, the solution of the present invention is:

[0006] A magnetic separator with a high mineral capture capacity and a non-uniform magnetic field gradient, comprising a magnetic separator body; the top and bottom ends of the magnetic separator body are respectively connected to a feed hopper and a discharge hopper; a magnetic medium box is arranged inside the magnetic separator body; at least two groups of magnetic medium are arranged inside the magnetic medium box, and each group of magnetic medium includes at least four magnetic medium rods; the magnetic medium rods include medium rods and medium rings spirally arranged on the outer circumference of the medium rods, and the medium rings are provided with channels connected to spiral grooves; a driving chain is connected to the tops between the medium rods, and the driving chain is connected to the output end of a driving mechanism arranged outside the magnetic separator body, so that multiple magnetic medium rods can rotate in the same direction; a cleaning rod is arranged inside the magnetic medium box at each of the magnetic medium rods, and the cleaning rod is vertically inserted in the spiral groove of the spiral medium ring and connected to the medium rod through an elastic connecting piece.

[0007] Furthermore, two magnetic blocks are respectively provided on the outer sides of the magnetic medium box.

[0008] Furthermore, the magnetic medium box is enclosed by baffles, and sealing strips are provided at the connection between adjacent baffles, so that the magnetic medium box forms a hollow frame structure; the magnetic medium rod is vertically inserted into the hollow cavity of the magnetic medium box.

[0009] Furthermore, only one dielectric ring is provided outside the dielectric rod, and the spiral surfaces at the upper and lower ends of the dielectric ring are parallel to the upper and lower end surfaces of the dielectric rod; through holes are evenly provided on the spiral side wall of the dielectric ring, and the through holes are connected to the spiral grooves of the dielectric ring.

[0010] Furthermore, at least two dielectric rings are arranged outside the dielectric rod, and a gap is arranged between adjacent dielectric rings; and the spiral surfaces at the upper and lower ends of the dielectric rings are arranged spirally from top to bottom.

[0011] Furthermore, the elastic connecting member includes a connecting ring 1 mounted on the dielectric rod, a guide rod fixed in the connecting ring 1, a telescopic rod slidably inserted in the guide rod, and a connecting ring 2 mounted on the cleaning rod; a spring is also provided in the inner cavity of the guide rod, and one end of the spring is connected to the telescopic rod.

[0012] After adopting the above scheme, the beneficial effects of the present invention compared with the prior art are:

[0013] (1) The present invention arranges a magnetic medium box with a magnetic medium rod and a cleaning rod inside the magnetic separator body, so that when the slurry is injected into the magnetic separator body from the feed hopper, the vertically flowing slurry will enter the magnetic medium box and contact the rotating magnetic medium rod, so that the slurry flows and falls in the spiral groove of the spiral medium ring and cuts the magnetic lines of force generated between the magnetic blocks. The special shape of the magnetic medium rod will prolong the flow time of the slurry in the spiral groove of the medium ring, thereby greatly improving the magnetic induction intensity and strengthening the magnetic field inhomogeneity on the surface of the medium, thereby effectively increasing the capture area of ​​the medium for the mineral and enhancing the capture capacity;

[0014] (2) The present invention adopts a cleaning rod and connects the cleaning rod to the dielectric rod of each magnetic medium rod through an elastic connecting piece, so that when the magnetic medium rod rotates, the elastic connecting piece can be extended and retracted to prompt the cleaning rod to move along the spiral groove of the dielectric ring, and then the cleaning rod can scrape the inner wall of the spiral groove, which can not only promote the flow of slurry, but also scrape off the fine particles adhered to the inner wall of the spiral groove, effectively avoiding the phenomenon of mineral particles being blocked at the magnetic medium rod;

[0015] (3) The present invention provides a channel connected to the spiral groove on the dielectric ring, so that a connecting structure can be formed between the inner and outer groove layers of the spiral groove, so that the fluidity of the slurry in the spiral groove can be increased after the slurry reaches the magnetic medium rod, effectively preventing the slurry particles from being blocked in the spiral groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the internal structure of the magnetic separator of the present invention;

[0017] Figure 2 It is a schematic diagram of the top view of the structure of the present invention;

[0018] Figure 3 It is a schematic diagram of the positional relationship between the magnetic medium rod and the cleaning rod of the present invention;

[0019] Figure 4 It is a schematic diagram of the three-dimensional structure of the magnetic medium rod in the first embodiment of the present invention;

[0020] Figure 5 It is a schematic diagram of the cross-sectional structure of the connection between the magnetic medium rod, the cleaning rod and the elastic connecting piece of the present invention;

[0021] Figure 6 It is a schematic diagram of the three-dimensional structure of the magnetic medium rod in the second embodiment of the present invention.

[0022] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0023] Feed hopper 1, magnetic separator body 2, discharge hopper 3, magnetic medium box 4, sealing strip 41, baffle 42, driving mechanism 5, magnetic block 6, magnetic medium rod 7, medium rod 71, medium ring 72, through hole 73, cleaning rod 8, elastic connector 9, connecting ring 1 91, guide rod 92, spring 93, telescopic rod 94, connecting ring 2 95. DETAILED DESCRIPTION

[0024] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0025] Embodiment 1:

[0026] like Figure 1-5As shown, a magnetic separator with a non-uniform magnetic field gradient and a high mineral capture capacity comprises a magnetic separator body 2; the top and bottom ends of the magnetic separator body 2 are respectively connected to a feed hopper 1 and a discharge hopper 3; a magnetic medium box 4 is arranged inside the magnetic separator body 2; at least two groups of magnetic medium are arranged inside the magnetic medium box 4, and each group of magnetic medium includes at least four magnetic medium rods 7; the magnetic medium rod 7 includes a medium rod 71 and a medium ring 72 spirally arranged on the outer circumference of the medium rod 71, and the medium ring 72 is provided with a channel connected to a spiral groove (not shown in the figure); a driving chain (not shown in the figure) is connected to the top between the medium rods 71, and the driving chain is connected to a driving mechanism 5 (not shown in the figure) arranged on the outside of the magnetic separator body 2. The output end of the magnetic medium box 4 is connected so that multiple magnetic medium rods 7 can rotate in the same direction; a cleaning rod 8 is provided inside the magnetic medium box 4 at each of the magnetic medium rods 7, and the cleaning rod 8 is vertically inserted in the spiral groove of the spiral medium ring 72 and connected to the medium rod 71 through an elastic connecting piece 9; in this embodiment, two magnetic blocks 6 are respectively provided on the outside of the magnetic medium box 4; wherein, the magnetic medium inside the magnetic medium box 4 is preferably four groups, each group of magnetic medium is preferably six magnetic medium rods 7, and the spiral opening directions of two adjacent magnetic medium rods 7 are staggered and spaced; the upper and lower ends of the magnetic medium box 4 are provided with fixing bars (not shown in the figure) for connecting the magnetic medium rods 7 and the cleaning rods 8, so that the magnetic medium rods 7 can be The cleaning rod 8 can be slidably connected to the upper fixed bar through a slider (not shown in the figure); the drive chain is sleeved under the upper fixed bar and connected to the upper end of the dielectric rod 71 of the magnetic medium rod 7, so that when the drive mechanism 5 rotates, the drive chain can drive the magnetic medium rod 7 to rotate; in this embodiment, the drive mechanism 5 is a bidirectional rotating motor, that is, the drive mechanism 5 can drive the magnetic medium rod 7 to rotate in the forward or reverse direction, so that the cleaning rod 8 can move from the opening on the outer side of the spiral groove of the dielectric ring 72 to the innermost side of the spiral groove, or move the cleaning rod 8 from the innermost side of the spiral groove of the dielectric ring 72 to the opening on the outer side of the spiral groove, and then drive the slurry through the forward and reverse motion (reciprocating rotation) of the magnetic medium rod 7 Flow and continuously cut the magnetic lines of force; when the ore pulp is injected into the magnetic separator body 2 from the feed hopper 1, the vertically flowing ore pulp is in the same direction as the setting direction of the magnetic medium rod 7, and horizontal magnetic lines of force are generated between the magnetic blocks 6 set on the outside of the magnetic medium box 4. Therefore, when the ore pulp flows vertically into the magnetic medium box 4, the ore pulp will flow in the spiral groove of the spirally set medium ring 72 and cut the magnetic lines of force, and the magnetic medium rod 7 rotates under the action of the driving mechanism 5. The rotating magnetic medium rod 7 will prolong the flow time of the ore pulp in the spiral groove of the medium ring 72, thereby greatly improving the magnetic induction intensity and strengthening the magnetic field inhomogeneity on the surface of the medium, thereby effectively increasing the capture area of ​​the medium for the mineral and enhancing the capture capacity;At the same time, when the magnetic medium rod 7 rotates, the cleaning rod 8 can move along the spiral groove of the medium ring 72 through the expansion and contraction of the elastic connecting piece 9, and the cleaning rod 8 can scrape the inner wall of the spiral groove, which can not only promote the flow of slurry, but also scrape off the fine particles adhered to the inner wall of the spiral groove, effectively avoiding the phenomenon of mineral particles being blocked at the magnetic medium rod 7;

[0027] like Figure 2 , 3 As shown, in this embodiment, the magnetic medium box 4 is enclosed by baffles 42, and sealing strips 41 are provided at the connection between adjacent baffles 42, so that the magnetic medium box 4 forms a hollow frame structure; the magnetic medium rod 7 is vertically inserted into the hollow cavity of the magnetic medium box 4; wherein the baffle 42 is a non-metallic plate; a groove matching the baffle 42 is provided at the sealing strip 41, so that the baffle 42 can be inserted into the sealing strip 41 to form a frame structure with corner sealing, which can facilitate the disassembly and cleaning of the magnetic medium box 4, and prevent the slurry from leaking from the gap between the sealing strip 41 and the baffle 42 when flowing in the magnetic medium box 4, so as to facilitate the maintenance and use of the magnetic medium box 4;

[0028] like Figure 5 As shown, in this embodiment, only one dielectric ring 72 is provided on the outer side of the dielectric rod 71, and the spiral surfaces at the upper and lower ends of the dielectric ring 72 are parallel to the upper and lower end surfaces of the dielectric rod 71; through holes 73 are evenly provided on the spiral side wall of the dielectric ring 72, and the through holes 73 are connected to the spiral groove of the dielectric ring 72; wherein, the dielectric ring 72 of a special shape can form a spiral groove of a special shape, and the through holes 73 provided on the spiral side wall of the dielectric ring 72 can be used as a channel to be connected to the spiral groove, so that the inner and outer grooves of the spiral groove form a connecting structure, so that when the slurry reaches the magnetic concentrating dielectric rod 7, the fluidity of the slurry in the spiral groove can be increased, so that the slurry particles can flow back and forth between the inner and outer layers of the spiral groove, thereby avoiding the particles from being blocked in the spiral groove;

[0029] like Figure 4 As shown, in this embodiment, the elastic connecting member 9 includes a connecting ring 91 sleeved on the dielectric rod 71, a guide rod 92 fixed in the connecting ring 91, a telescopic rod 94 slidably inserted in the guide rod 92, and a connecting ring 95 sleeved on the cleaning rod 8; a spring 93 is also provided in the inner cavity of the guide rod 92, and one end of the spring 93 is connected to the telescopic rod 94; wherein, the connecting ring 91 is rotatably arranged on the dielectric rod 71, so that the elastic connecting member 9 can rotate around the dielectric rod 71 through the connecting ring 91; and the telescopic rod 94 can squeeze the spring 93 to telescopically slide in the inner cavity of the guide rod 92, so as to pull the cleaning rod 8 to move left and right through the telescopic rod 94, so that the cleaning rod 8 can move along the shape of the spiral groove when the magnetic medium rod 7 rotates, thereby realizing the scraping operation on the inner wall of the spiral groove;

[0030] Embodiment 2:

[0031] like Figure 6 As shown, the difference between this embodiment and the first embodiment is that: in this embodiment, at least two dielectric rings 72 are arranged outside the dielectric rod 71, and gaps are arranged between adjacent dielectric rings 72; the spiral surfaces at the upper and lower ends of the dielectric rings 72 are arranged spirally from top to bottom; wherein, preferably three dielectric rings 72 are arranged outside the dielectric rod 71; the gaps arranged between the dielectric rings 72 can be used as channels to communicate with the spiral grooves, so that the slurry can have good fluidity when it reaches the magnetic medium rod 7, which can enhance the magnetic induction intensity of the slurry at the magnetic medium rod 7 and increase the capture area of ​​the medium for the minerals, and can also avoid the phenomenon of mineral particles being blocked at the magnetic medium rod 7, thereby ensuring the capture capacity of the magnetic medium box 4;

[0032] In summary, the present invention provides a magnetic separator with a high mineral capture capacity with a non-uniform magnetic field gradient. By arranging a magnetic medium box 4 with a magnetic medium rod 7 and a cleaning rod 8 inside the magnetic separator body 2, when the slurry is injected from the feed hopper 1 into the magnetic separator body 2, the vertically flowing slurry will enter the magnetic medium box 4 and contact with the rotating magnetic medium rod 7, so that the slurry flows and falls in the spiral groove of the spiral medium ring 72 and cuts the magnetic lines of force generated between the magnetic blocks 6. The specially shaped magnetic medium rod 7 will extend the slurry in the spiral groove of the medium ring 72. The flow time in the spiral groove greatly increases the magnetic induction intensity and strengthens the magnetic field inhomogeneity on the medium surface, thereby effectively increasing the medium's capture area for minerals and enhancing the capture capacity; at the same time, the cleaning rod 8 can move along the spiral groove of the medium ring 72 through the expansion and contraction of the elastic connecting piece 9 when the magnetic medium rod 7 rotates, and the cleaning rod 8 can scrape the inner wall of the spiral groove, which can not only promote the flow of slurry, but also scrape off the fine particles adhered to the inner wall of the spiral groove, effectively avoiding the blockage of mineral particles at the magnetic medium rod 7.

[0033] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms should not be understood as necessarily being directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0034] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A magnetic separator with a high mineral capture ability and a non-uniform magnetic field gradient, characterized in that: It includes a magnetic separation body (2), and a feed hopper (1) and a discharge hopper (3) are respectively connected to the top and bottom of the magnetic separation body (2); at least two groups of magnetic concentration media are arranged inside the magnetic concentration media box (4) inside the magnetic separation body (2), and each group of magnetic concentration media includes at least four magnetic concentration media rods (7); the magnetic concentration media rod (7) includes a media rod (71) and a media ring (72) spirally arranged on the outer circumference of the media rod (71), and a channel communicating with the spiral groove is arranged on the media ring (72); a driving chain is connected to the top between the media rods (71), and the driving chain is connected to the output end of a driving mechanism (5) arranged outside the magnetic separation body (2), so that multiple magnetic concentration media rods (7) can rotate in the same direction; a cleaning rod (8) is arranged inside the magnetic concentration media box (4) at each magnetic concentration media rod (7), and the cleaning rod (8) is vertically inserted into the spiral groove of the spiral-shaped media ring (72) and connected to the media rod (71) through an elastic connecting piece (9); Two magnetic force blocks (6) are respectively arranged outside the magnetic concentration media box (4); The magnetic concentration media box (4) is enclosed by baffles (42), and a sealing strip (41) is arranged at the connection of adjacent baffles (42), so that the magnetic concentration media box (4) forms a hollow frame structure; the magnetic concentration media rods (7) are vertically inserted into the hollow cavity of the magnetic concentration media box (4); Only one media ring (72) is arranged outside the media rod (71), and the spiral surfaces at the upper and lower ends of the media ring (72) are parallel to the upper and lower end surfaces of the media rod (71); through holes (73) are uniformly arranged on the spiral side wall of the media ring (72), and the through holes (73) communicate with the spiral groove of the media ring (72).

2. The magnetic separator with a high mineral capture ability and a non-uniform magnetic field gradient according to claim 1, characterized in that: At least two media rings (72) are arranged outside the media rod (71), and a gap is arranged between adjacent media rings (72); the spiral surfaces at the upper and lower ends of the media ring (72) are spirally arranged from top to bottom.

3. The magnetic separator with a high mineral capture ability and a non-uniform magnetic field gradient according to claim 2, characterized in that: The elastic connecting piece (9) includes a first connecting ring (91) sleeved on the media rod (71), a guide rod (92) fixed in the first connecting ring (91), a telescopic rod (94) slidably inserted in the guide rod (92), and a second connecting ring (95) sleeved on the cleaning rod (8); a spring (93) is further arranged in the inner cavity of the guide rod (92), and one end of the spring (93) is connected to the telescopic rod (94).

Images