Variable distance strong magnetic force adjusting system and red mud magnetic separation device

Abstract

The application discloses a variable-distance strong magnetic force adjusting system and a red mud magnetic separation device, and relates to the technical field of magnetic separation devices. The magnetic system is composed of multiple magnetic strips; the partition module is configured to divide the magnetic system into multiple magnetic zones; the distance adjusting module is configured to adjust the distance between the magnetic zones and the drum wall; and the driving module is configured to drive the distance adjusting module and the partition module to operate. The application has the beneficial effects that the partition module, the distance adjusting module and the driving module are arranged to divide the magnetic system into different magnetic zones, the size of the magnetic zones can be adjusted, and the magnetic field intensity of the regions corresponding to the different magnetic zones at the drum wall can be adjusted.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of magnetic field, relates to the field of magnetic field adjustment, and particularly relates to a variable-distance strong magnetic force adjustment system and a red mud magnetic separation device. BACKGROUND

[0002] The magnetic system arranged in the inside of the existing magnetic separation device drum determines the magnetic field strength at the drum wall during magnetic separation. The magnetic system is usually an electromagnet. In order to make the drum wall regions at different heights have the same adsorption effect on the material, different magnetic field strengths need to be arranged for different regions of the drum wall to achieve this. After such arrangement, the magnetic field strengths of the regions of the drum wall with adsorption function are different. The existing method for realizing the difference of the magnetic field strength regions of the magnetic system is to change the magnetic field strength gradient by arranging different numbers of turns of electromagnets, so that the magnetic field strength at the drum wall is also gradient changed. However, the number of turns has been arranged when the magnetic separation device is produced, and cannot be adjusted subsequently. Therefore, it is irreversible to change the magnetic field strength of the magnetic system by changing the number of turns to realize the difference of the magnetic field strength regions of the drum wall. The magnetic field strength at the drum wall cannot be adjusted to be the same, and the magnetic field strength at the drum wall cannot be adjusted arbitrarily. SUMMARY

[0003] To solve the above technical problems, the application provides a variable-distance strong magnetic force adjustment system and a red mud magnetic separation device.

[0004] To achieve the above purpose, the technical scheme adopted by the application is:

[0005] The application provides a variable-distance strong magnetic force adjustment system applied to a drum of a magnetic separation device, comprising:

[0006] a magnetic system;

[0007] a partition module;

[0008] a distance adjustment module;

[0009] a driving module;

[0010] The magnetic system is composed of multiple rows of magnetic strips.

[0011] The partition module is configured to divide the magnetic system into multiple magnetic regions.

[0012] The distance adjustment module is configured to adjust the distance between the magnetic regions and the drum wall.

[0013] The driving module is configured to drive the distance adjustment module and the partition module to operate.

[0014] Preferably, the partition module comprises:

[0015] Short shafts arranged at both ends of each column of magnetic strips in the length direction of the magnetic strips;

[0016] Limiting ring;

[0017] The limiting ring can be sleeved into one or more short shafts on the same side of the magnetic system.

[0018] The limiting ring is movably connected with the driving module.

[0019] Preferably, the limiting ring is three-sectioned, comprising:

[0020] Section A;

[0021] Section B;

[0022] Section C;

[0023] The middle part of the section C is movably connected with the driving module.

[0024] The section B is movably connected with the section A; and

[0025] The section B is movably connected with the section C.

[0026] The section A and the section C can move towards or away from each other along the section B.

[0027] Preferably, when the section A and the section C move along the section B, the distance of movement along the section B is the same.

[0028] Preferably, the partition module comprises:

[0029] U-shaped support member;

[0030] The section C comprises an upper section and a lower section.

[0031] One end of the U-shaped support member is fixedly connected with the middle part of the upper section of the section C; and

[0032] The other end of the U-shaped support member is fixedly connected with the middle part of the lower section of the section C.

[0033] Preferably, the variable-distance strong magnetic force adjusting system comprises:

[0034] Center shaft;

[0035] The partition module has a track.

[0036] Each end of the limiting ring in the length direction is movably connected with one end of one track.

[0037] The other end of the track is detachably connected with a connecting part N1 arranged on the center shaft.

[0038] Preferably, the angle between the two tracks connected to the same end of the limiting ring is adjustable.

[0039] Preferably, the distance adjusting module comprises:

[0040] Adjusting member;

[0041] The adjusting member comprises a sliding rod and a tension spring;

[0042] One end of the sliding rod passes through the magnetic strip; and

[0043] The magnetic strip is in sliding connection with the sliding rod;

[0044] The other end of the sliding rod is fixedly connected to the connecting part N2 arranged on the central shaft;

[0045] The tension spring is sleeved in the sliding rod, and one end of the tension spring is fixedly connected to the magnetic strip; and

[0046] The other end of the tension spring is fixedly connected to the connecting part N2;

[0047] Each magnetic strip has at least two adjusting members;

[0048] Preferably, the driving module comprises:

[0049] Driving member E1;

[0050] Driving member E2;

[0051] Driving member E3;

[0052] One end of the driving member E1 is detachably connected to two tracks connected to the same limiting ring; and

[0053] The driving member E1 is configured to adjust the angle between the two tracks connected to the same limiting ring in the length direction;

[0054] One end of the driving member E2 is hingedly connected to the middle of the lower segment of the C segment; and

[0055] The other end of the driving member E2 is detachably connected to the central rotating shaft;

[0056] The driving member E2 is configured to drive the magnetic area sleeved by the limiting ring to displace along the track; and

[0057] The two ends of the driving member E3 are detachably connected to the connecting parts N1 at the two ends of the magnetic system in the length direction;

[0058] The driving member E3 is configured to drive the connecting parts N1 at the two ends of the magnetic system in the length direction to relatively displace;

[0059] A red mud magnetic separation device comprises:

[0060] The drum adopts the variable-distance strong magnetic force adjusting system.

[0061] A feed inlet, a tailing outlet, a fine material outlet and a mine discharge water pipe.

[0062] End caps with through holes; driving devices.

[0063] Groove bodies with first end faces, second end faces and third end faces; bases.

[0064] The diameter of the through hole is the same as the diameter of the cross section of the central shaft; and,

[0065] After the through hole is sleeved on the central shaft, displacement along the central shaft occurs until the end cap and the two ends of the drum are connected and stopped; and,

[0066] After the two end caps are connected with the two ends of the drum, the drum becomes a closed cavity.

[0067] The driving device is installed on one end of the central shaft; and,

[0068] The driving device is used to drive the drum to rotate in the circumferential direction.

[0069] The drum is axially placed inside the groove body.

[0070] The mine discharge water pipe is detachably connected with the first end face.

[0071] The fine material outlet is fixedly connected with the first end face; and,

[0072] The position of the fine material outlet is lower than that of the mine discharge water pipe.

[0073] The feed inlet is fixedly connected with the second end face.

[0074] The tailing outlet is located on the third end face; and,

[0075] The tailing outlet is below the drum.

[0076] The groove body is detachably connected with the base.

[0077] The beneficial effects of the present application are embodied in the provision of a variable-distance strong magnetic force adjusting system and a red mud magnetic separation device, which can divide the magnetic system into different magnetic zones through the setting of the partition module, the distance adjusting module and the driving module, the size of the magnetic zone is adjustable, and the magnetic field strength of the region corresponding to the drum wall of different magnetic zones is adjustable. BRIEF DESCRIPTION OF DRAWINGS

[0078] Figure 1 It is a schematic diagram of the variable-distance strong magnetic force adjusting system of the embodiment of the present application.

[0079] Figure 2 A side view of a variable distance strong magnetic force adjusting system according to an embodiment of the present application;

[0080] Figure 3 A sectional view of a roller according to an embodiment of the present application;

[0081] Figure 4 A schematic view of a limiting ring according to an embodiment of the present application;

[0082] Figure 5 A schematic view of a red mud magnetic separation device according to an embodiment of the present application. DETAILED DESCRIPTION

[0083] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0084] Please refer to Figures 1-5 The specific embodiments provided by the present application are as follows:

[0085] Embodiment 1

[0086] A variable distance strong magnetic force adjusting system is applied to a roller 1 of a magnetic separation device, and comprises:

[0087] a magnetic system 2;

[0088] a partition module;

[0089] a distance adjusting module;

[0090] a driving module;

[0091] The magnetic system 2 is composed of multiple columns of magnetic strips 3.

[0092] The partition module is configured to divide the magnetic system 2 into multiple magnetic zones 4.

[0093] The distance adjusting module is configured to adjust the distance between the magnetic zones 4 and the wall of the roller 1.

[0094] The driving module is configured to drive the distance adjusting module and the partition module to operate.

[0095] The magnetic system arranged inside the existing magnetic separation device drum determines the magnetic field intensity at the drum wall during magnetic separation. The magnetic system is usually electromagnetic. In order to make the adsorption effect of the area slightly higher than the lowest part of the drum wall the same, and the adsorption effect of the area close to the ore unloading water pipe of the drum wall can realize that the material falls from the drum wall into the concentrate outlet under the action of the impact force of the ore unloading water pipe and its own gravity, different magnetic field intensities need to be arranged in different areas of the drum wall.

[0096] In the embodiment, a variable-distance strong magnetic force adjusting system applied to a drum of a magnetic separation device includes a magnetic system, a partition module, a distance adjusting module, and a driving module. The magnetic system in the drum of the magnetic separation device is composed of multiple rows of magnetic strips. The partition module is arranged to enable a user to divide the magnetic system into different magnetic zones according to requirements during use. Each magnetic zone contains at least one row of magnetic strips. The distance adjusting module is arranged to control the magnetic field intensity at the drum wall by adjusting the distance between the magnetic zones divided by the partition module and the drum wall. The driving module is arranged to drive the partition module and the distance adjusting module to operate. This arrangement enables the magnetic field intensity of the area of the drum wall having an adsorption function to be arbitrarily adjusted, and the magnetic field intensity can be the same or different, thereby meeting the higher-level use requirements of the user.

[0097] Embodiment 2

[0098] The partition module includes:

[0099] a short shaft 5 arranged at both ends in the length direction of each row of magnetic strips 3;

[0100] a limiting ring 6;

[0101] The limiting ring 6 can be sleeved into one or more short shafts 5 on the same side of the magnetic system 2.

[0102] The limiting ring 6 is movably connected with the driving module.

[0103] In the embodiment, the partition module includes a short shaft arranged at both ends in the length direction of each row of magnetic strips and a limiting ring. The limiting ring can be sleeved into one or more short shafts on the same side of the magnetic system, and the limiting ring is movably connected with the driving module. Through such arrangement of the limiting ring, the magnetic strips in which the short shafts sleeved by the same limiting ring are divided into the same magnetic zone, and the same magnetic zone has the same magnetic field intensity.

[0104] Embodiment 3

[0105] The limiting ring 6 is three-sectioned and includes:

[0106] A section;

[0107] B section;

[0108] C section;

[0109] The C section is movably connected with the driving module;

[0110] The B section is movably connected with the A section; and

[0111] The B section is movably connected with the C section;

[0112] The A section and the C section can move towards or away from each other along the B section;

[0113] Preferably, when the A section and the C section move along the B section, the distance of movement along the B section is the same.

[0114] In this embodiment, the limiting ring is three-sectioned, the B section is movably connected with the A section, the B section is movably connected with the C section, the A section and the C section can move towards or away from each other along the B section, and the distance of movement along the B section is the same. With such a design, when the A section and the C section move along the B section, the length of the limiting ring changes, so that the length of the limiting ring is adjustable, the number of short shafts that can be sleeved by the limiting ring is adjustable, and the size of the magnetic area fixed by the limiting ring is adjustable. After adjustment, the C section is always located at the middle position in the length direction of the limiting ring, and the driving module can better exert force when driving the limiting ring to move. Preferably, the A section, the B section, and the C section are all racks, the A section and the B section have a gear D1 therebetween, the C section and the B section have a gear D2 therebetween, and the D1 and the D2 can be engaged with the racks.

[0115] Embodiment 4:

[0116] The partition module comprises:

[0117] a U-shaped support member 7;

[0118] The C section comprises an upper section 8 and a lower section 9.

[0119] One end of the U-shaped support member 7 is fixedly connected with the middle part of the upper section 8 of the C section; and

[0120] The other end of the U-shaped support member 7 is fixedly connected with the middle part of the lower section 9 of the C section.

[0121] In the embodiment, the partition module comprises a U-shaped support member, and the C-shaped segment comprises an upper segment and a lower segment; one end of the U-shaped support member is fixedly connected with the middle part of the upper segment of the C-shaped segment, and the other end is fixedly connected with the middle part of the lower segment of the C-shaped segment. When the distance between the driving limiting ring and the drum wall changes, the upper segment of the C-shaped segment has a trend of deviating from the driving direction of the driving module due to the three-segment type of the limiting ring. The U-shaped support member is arranged to fixedly connect the upper segment and the lower segment, and the U-shaped support member can balance the trend of the upper segment deviating from the driving direction of the driving module when the driving module drives the limiting ring, so that the magnetic area sleeved by the limiting ring can be displaced as a whole under the action of the driving module.

[0122] Embodiment 5

[0123] The variable-distance strong magnetic force adjusting system comprises a central shaft 10;

[0124] The partition module has a track 11.

[0125] The two ends of the limiting ring 6 in the length direction are each slidably connected with one end of a track 11.

[0126] The other end of the track 11 is detachably connected with a connecting part N1 arranged on the central shaft 10.

[0127] In the embodiment, the partition module has a track, the two ends of the limiting ring in the length direction are each slidably connected with one end of a track, and the other end of the track is detachably connected with a connecting part N1 arranged on the central shaft. Through the arrangement of the track, when the distance between the magnetic area and the drum wall is adjusted, the limiting ring only needs to be displaced along the track under the action of the driving module and gravity.

[0128] Preferably, the included angle between the two tracks connected with the two ends of the same limiting ring 6 is adjustable.

[0129] In the preferred scheme of the embodiment, the included angle between the two tracks connected with the two ends of the same limiting ring is adjustable. Since the two tracks are slidably connected with the two ends in the length direction of the limiting ring, the number of short shafts sleeved by the limiting ring can be adjusted by adjusting the included angle between the two tracks, so as to adjust the size of the magnetic area limited by the limiting ring.

[0130] Embodiment 6

[0131] The adjusting member comprises a slide rod 12 and a tension spring 13.

[0132] One end of the slide rod 12 penetrates the magnetic stripe 3; and

[0133] The magnetic stripe 3 is slidably connected with the slide rod 12.

[0134] The other end of the slide rod 12 is fixedly connected with the connecting part N2 arranged on the central shaft 10.

[0135] The slide rod 12 is sleeved with the tension spring 13, one end of the tension spring 13 is fixedly connected with the magnetic strip 3, and the other end of the tension spring 13 is fixedly connected with the connecting part N2.

[0136] The slide rod 12 is sleeved with the tension spring 13, one end of the tension spring 13 is fixedly connected with the magnetic strip 3, and the other end of the tension spring 13 is fixedly connected with the connecting part N2.

[0137] Each magnetic strip 3 is provided with at least two adjusting members.

[0138] In the embodiment, the distance adjusting module comprises the adjusting member, the adjusting member comprises the slide rod and the tension spring, one end of the slide rod penetrates through the magnetic strip, the magnetic strip is in sliding connection with the slide rod, the other end of the slide rod is fixedly connected with the connecting part N2 arranged on the central shaft, the slide rod is sleeved with the tension spring, one end of the tension spring is fixedly connected with the magnetic strip, the other end of the tension spring is fixedly connected with the connecting part N2, and each magnetic strip is provided with at least two adjusting members. Through the adjusting member, the size of a certain magnetic area can be adjusted while the magnetic strip is supported by the slide rod, and the adjustment of the distance between the magnetic area and the drum wall can be realized by adjusting the state of the tension spring on all the magnetic strips in the magnetic area.

[0139] Embodiment 7

[0140] The driving module comprises:

[0141] The driving member E1;

[0142] The driving member E2;

[0143] The driving member E3;

[0144] The two ends of the driving member E1 are respectively detachably connected with the two tracks 11 connected with the same limiting ring 6.

[0145] The driving member E1 is configured to adjust the included angle between the two tracks 11 connected with the two ends of the limiting ring 6 in the length direction.

[0146] One end of the driving member E2 is hingedly connected with the middle part of the lower section 9 of the C section.

[0147] The other end of the driving member E2 is detachably connected with the central rotating shaft.

[0148] The driving member E2 is configured to drive the magnetic area 4 sleeved with the limiting ring 6 to displace along the track 11.

[0149] The two ends of the driving member E3 are respectively detachably connected with the connecting parts N1 at the two ends of the magnetic system 2 in the length direction.

[0150] The driving member E3 is configured to drive the relative displacement of the connecting portions N1 at the two ends of the magnetic system 2 in the length direction.

[0151] In the embodiment, the angle between the two tracks connected at the two ends of the limiting ring in the length direction is adjusted by the driving member E1; the magnetic region in the track driven by the limiting ring is displaced by the driving member E2; the relative displacement of the track connected to the connecting portion N1 and the limiting ring connected to the track is caused by the relative displacement of the connecting portions N1 at the two ends of the driving member E3, so that the limiting ring at the two ends of the magnetic system in the length direction is sleeved into the short shaft, and the size of the magnetic region is adjusted by only placing the connecting portion N1 at the initial position, and the size adjustment of the magnetic region is completed by sleeving the limiting ring into the short shaft by the driving member E3 after the adjustment is completed.

[0152] Embodiment 8:

[0153] A red mud magnetic separation device, comprising:

[0154] The drum 1 adopts the variable-distance strong magnetic force adjustment system described above;

[0155] The feeding port 14, the tailing port 15, the fine material port 16, and the ore unloading water pipe 17;

[0156] The end cover 19 with the through hole 18; the driving device 20;

[0157] The groove body 24 with the first end face 21, the second end face 22, and the third end face 23; the base 25;

[0158] The diameter of the through hole 18 is the same as the diameter of the cross section of the central shaft 10; and,

[0159] After the through hole 18 is sleeved into the central shaft 10, displacement occurs along the central shaft 10 until the end cover 19 is connected to the two ends of the drum 1; and,

[0160] After the two end covers are connected to the two ends of the drum 1, the drum 1 becomes a closed cavity;

[0161] The driving device 20 is installed on one end of the central shaft 10; and,

[0162] The driving device 20 is used to drive the drum 1 to rotate in the circumferential direction;

[0163] The drum 1 is placed axially inside the groove body 24;

[0164] The ore unloading water pipe 17 is detachably connected to the first end face 21;

[0165] The fine material port 16 is fixedly connected to the first end face 21; and,

[0166] The position of the concentrate outlet 16 is lower than the discharge water pipe;

[0167] The feed inlet 14 is fixedly connected with the second end surface 22.

[0168] The tailing outlet 15 is located on the third end surface 23.

[0169] The tailing outlet 15 is located below the roller.

[0170] The groove body 24 is detachably connected with the base 25.

[0171] In the embodiment, about 70% of the components in the red mud are diiron trioxide, and the most important step in the red mud treatment is to extract the diiron trioxide, and the commonly used method for extracting the iron element is to oxidize the diiron trioxide in the red mud into triiron tetroxide, the triiron tetroxide contains magnetism, and the triiron tetroxide is extracted through the magnetic separation device, and after subsequent drying and electric selection, the triiron tetroxide is refined iron powder, but in actual application, according to different effects of the refined iron powder, the taste of the extracted refined iron powder is different, the higher the taste is, the greater the magnetic field strength of the magnetic separation is, and the less the extracted refined iron powder is, usually, the magnetic system arranged in the roller of the magnetic separation device determines the magnetic field strength of the magnetic separation, in order to make the adsorption effect of the area slightly higher than the roller wall and the lowest part of the roller wall be the same, and the adsorption effect of the area close to the discharge water pipe of the roller wall can realize that the material falls from the roller wall into the concentrate outlet under the action of the impact force of the discharge water pipe and the gravity of the material, the setting of the embodiment can realize that different magnetic field strengths are arranged in different areas of the roller wall to meet the magnetic separation requirement.

[0172] In the description of the embodiments of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "center", "top", "bottom", "top", "bottom", "inner", "outer", "inner side", "outer side" and the like indicate the orientation or positional relationship.

[0173] In the description of the embodiments of the present application, it should be noted that unless otherwise specifically defined and limited, the terms "mounting", "connecting", "connecting", "assembling" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0174] In the description of the embodiments of the present application, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0175] In the description of the embodiments of the present application, it needs to be understood that "-" and "~" represent the range of the same of two numerical values, and the range includes the end points. For example: "A-B" represents the range of greater than or equal to A, and less than or equal to B. "A~B" represents the range of greater than or equal to A, and less than or equal to B.

[0176] In the description of the embodiments of the present application, the term "and / or" herein is only to describe the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can represent three cases of A alone, A and B together, and B alone. In addition, the character " / " herein generally represents that the associated objects before and after are an "or" relationship.

[0177] Although the embodiments of the present application have been shown and described, it can be understood by those of ordinary skill in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the present application.

Claims

1. A variable-pitch, high-intensity magnetic force adjustment system, applied in the drum of a magnetic separation device, characterized in that, include: Magnetic system; Partitioning module; Adjustable distance module; Driver module; The magnetic system is composed of multiple rows of magnetic strips; The partitioning module is configured to divide the magnetic system into multiple magnetic regions; The distance adjustment module is configured to adjust the distance between the magnetic zone and the drum wall; The drive module is configured to drive the distance adjustment module and the partition module to operate. The partitioning module includes: Short axes are set at both ends of the length direction of each column of magnetic strips; Limiting ring; The limiting ring can be fitted into one or more short shafts on the same side of the magnetic system; The limiting ring is movably connected to the drive module; The limiting ring is a three-segment type, including: Section A; Section B; Section C; The middle part of segment C is movably connected to the drive module; Wherein, segment B is slidably connected to segment A; and, Segment B and segment C are slidably connected; Among them, segments A and C can be displaced in opposite directions or in opposite directions along segment B.

2. The variable-pitch strong magnetic force adjustment system according to claim 1, characterized in that, When segments A and C are displaced along segment B, the distance of displacement along segment B is the same.

3. The variable-pitch strong magnetic force adjustment system according to claim 2, characterized in that, The partitioning module includes: U-shaped support components; The C segment includes an upper segment and a lower segment; One end of the U-shaped support member is fixedly connected to the middle of the upper section of segment C; and... The other end of the U-shaped support member is fixedly connected to the middle of the lower section of segment C.

4. The variable-pitch strong magnetic force adjustment system according to claim 3, characterized in that, include: Central axis; The partitioning module has tracks; The limiting ring is slidably connected to one end of a track at both ends along its length. The other end of the track is detachably connected to the connecting part N1 located on the central shaft.

5. The variable-pitch strong magnetic force adjustment system according to claim 4, characterized in that, The included angle between the two tracks connected to both ends of the same limiting ring is adjustable.

6. The variable-pitch strong magnetic force adjustment system according to claim 5, characterized in that, The distance adjustment module includes: Adjustment components; The adjusting component includes a slide rod and a tension spring; Wherein, one end of the slide rod passes through the magnetic strip; and, The magnetic strip is slidably connected to the slide bar; The other end of the slide rod is fixedly connected to the connecting part N2 provided on the central shaft; The tension spring is fitted into the slide rod, and one end of the tension spring is fixedly connected to the magnetic strip; and, The other end of the tension spring is fixedly connected to the connecting part N2; Each of the magnetic strips has at least two adjustment components.

7. The variable-pitch strong magnetic force adjustment system according to claim 6, characterized in that, The driving module includes: Drive component E1; Drive component E2; Drive component E3; The driving component E1 is detachably connected at both ends to two rails that are connected to the same limiting ring; and... The driving component E1 is configured to adjust the included angle between two tracks connected to both ends of the same limiting ring along its length direction. Wherein, one end of the driving component E2 is hinged to the middle of the lower section of segment C; and, The other end of the driving component E2 is detachably connected to the central rotating shaft; The driving component E2 is configured to drive the magnetic region, into which the limiting ring is fitted, to displace along the track; and, The two ends of the driving component E3 are detachably connected to the connecting parts N1 at both ends of the magnetic system length direction; The driving component E3 is configured to drive the connection portions N1 at both ends of the magnetic system to undergo relative displacement in the length direction.

8. A red mud magnetic separation device, characterized in that, include: A drum employing the variable-pitch strong magnetic force adjustment system as described in any one of claims 1-7; Feed inlet; Tailings outlet; concentrate outlet; ore unloading water pipe; End cap with through-hole; drive mechanism; A groove having a first end face, a second end face, and a third end face; a base; Wherein, the diameter of the through hole is the same as the diameter of the cross-section of the central shaft; and, After the through hole is fitted into the central shaft, it will displace along the central shaft until the end cap is connected to both ends of the roller and stops; and, After the two end caps are connected to both ends of the roller, the roller becomes a closed cavity; The drive device is mounted on one end of the central shaft; and, The driving device is used to drive the drum to rotate in the circumferential direction; The roller is axially placed inside the groove. The ore unloading water pipe is detached from the first end face; The feed inlet is fixedly connected to the first end face; and, The position of the concentrate inlet is lower than that of the ore unloading water pipe; The feed inlet is fixedly connected to the second end face; Wherein, the tail outlet is located on the third end face; and, The tail outlet is located below the roller; The groove is detachably connected to the base.

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