Dry drum magnetic separator

Abstract

The application discloses a dry type drum magnetic separator and relates to the technical field of mining equipment. The dry type magnetic separation of the iron ore raw material is carried out in one rough and one fine mode on the basis of the two-stage closed-circuit fine crushing process, the iron grade of the final concentrate can be effectively improved, a plurality of rotating drums which are mutually sleeved are rotatably arranged between the inner end wall of the cylinder and the arc-shaped permanent magnet, a magnetic isolation plate is arranged on the rotating drum, the number of the magnetic isolation plates which are arranged between the inner end wall of the cylinder and the arc-shaped permanent magnet can be adjusted, the magnetic attraction strength of the arc-shaped permanent magnet which acts on the cylindrical surface of the cylinder can be flexibly controlled, the universality of a single dry type drum magnetic separator can be effectively improved, a plurality of dry type drum magnetic separators with different magnetic attraction strengths do not need to be customized for the rough and fine multi-working-condition magnetic separation operation, the convenience of the magnetic separation process implementation is effectively improved, and thus the production cost is reduced, and the production efficiency is improved to a certain extent.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mining equipment, and particularly relates to a dry drum magnetic separator. BACKGROUND

[0002] In iron ore mining and processing, the dry drum magnetic separator is a core equipment for realizing mineral separation and is widely applied to multi-link combined screening processes such as roughing and cleaning. The mainstream dry drum magnetic separator for iron ore magnetic separation currently adopts a permanent magnet structure, which has the advantages of stable magnetic field, no external power supply and low energy consumption.

[0003] In the prior art, the magnetic field strength of the permanent magnet is fixedly determined by the material, specification and arrangement mode of the permanent magnet, which makes it impossible to dynamically adjust the magnetic force of the magnetic separator with the permanent magnet structure after the equipment is delivered. In actual iron ore processing, a stronger magnetic field is required in the roughing link to efficiently adsorb a large number of magnetic minerals and reduce the missed selection, and a weaker magnetic field is required in the cleaning link to remove impurities such as gangue and improve the concentrate grade. Since the magnetic force of the permanent magnet magnetic separator is not adjustable, enterprises need to separately configure special equipment for different separation links, which not only increases the cost of equipment procurement and land area, but also requires frequent adjustment of the production line layout to switch the roughing and cleaning processes, resulting in poor flexibility of the equipment, difficulty in adapting to multi-working-condition continuous production requirements, and affecting the production efficiency. SUMMARY

[0004] The present application aims to solve the problem in the prior art that the magnetic attraction strength of the permanent magnet magnetic separator is difficult to flexibly adjust in actual use, and provides a dry drum magnetic separator.

[0005] In order to solve the problems in the prior art, the present application adopts the following technical solutions:

[0006] The utility model provides a dry type drum magnetic separator, which comprises a frame, a cylinder rotatably installed in the frame, a first groove body fixedly installed at the bottom of the frame, a second groove body fixedly installed at the front of the cylinder in the frame, a first servo motor fixedly installed on the frame and used for driving the cylinder to rotate, a shaft rod penetrating through the central axis of the cylinder and fixedly installed on the shaft rod, a sector frame fixedly installed in the cylinder, an arc-shaped permanent magnet fixedly installed on the sector frame and facing the second groove body, a magnetic separation mechanism arranged between the cylinder and the arc-shaped permanent magnet, a plurality of rotating drums coaxially arranged in the magnetic separation mechanism, a first shaft drum fixedly installed at the left end center position of the rotating drum, a plurality of first shaft drums telescopically connected with each other, a second shaft drum fixedly installed at the right end center position of the rotating drum, a magnetic separation plate arranged on the cylindrical surface of the rotating drum, and a non-magnetic plate arranged on the cylindrical surface of the rotating drum.

[0007] Preferably, the shaft rod is rotatably connected with the frame, a first lever is fixedly installed at the end position of the shaft rod, and a hydraulic telescopic rod is hingedly connected between the end of the first lever and the frame.

[0008] Preferably, the thickness of the magnetic separation plate on the plurality of rotating drums decreases layer by layer from the inside to the outside.

[0009] Preferably, the cylinder wall of the outermost rotating drum is slidably attached to the inner end wall of the cylinder, and the cylinder wall of the innermost rotating drum is slidably attached to the arc-shaped permanent magnet.

[0010] Preferably, the driving mechanism comprises a first gear fixedly installed at the end position of the first shaft drum, a plurality of coaxially arranged first spline barrels rotatably installed on the frame, a second gear fixedly installed on each first spline barrel, a plurality of second gears corresponding to the plurality of first gears and being meshed with each other, a second spline barrel coaxially arranged with the first spline barrel and fixedly installed on the frame, a spline shaft slidably inserted into the second spline barrel, the outer dimension of the spline shaft being adapted to the inner dimension of the first spline barrel, a plurality of insertion holes uniformly distributed in the spline shaft, a plug inserted into the insertion hole and fixedly installed at the end position of the second spline barrel, and a second servo motor fixedly installed on the frame.

[0011] Preferably, a worm gear is fixedly installed on the second spline barrel, and a worm is meshingly connected to the outer side of the worm gear and fixedly installed on the driving shaft of the second servo motor.

[0012] Preferably, the teeth on the first gear are provided with only half a circle, the right side of the plurality of rotating drums is provided with a reset mechanism, the reset mechanism comprises a movable sleeve arranged on the outer side of the right end of the shaft and a shaft sleeve rotatably arranged in the cylinder, the shaft sleeve is fixedly connected with the rack, a fixed plate corresponding to the plurality of rotating drums is fixedly arranged on the shaft sleeve, and a tension spring is fixedly connected between the fixed plate and the corresponding rotating drum.

[0013] Preferably, a clamping groove is formed in the second shaft cylinder, and a positioning pin arranged in the inner side of the clamping groove is fixedly arranged on the shaft sleeve.

[0014] Preferably, a rotating shaft is rotatably arranged in the rack, the rotating shaft is fixedly connected with the guide plate, a second lever is fixedly arranged at the end position of the rotating shaft, and a fastening bolt is arranged at the end position of the second lever.

[0015] Preferably, the left and right sides of the cylindrical surface of the cylinder are fixedly provided with surrounding baffles, the left baffle is located to the right of the left edge of the arc-shaped permanent magnet, and the right baffle is located to the left of the right edge of the arc-shaped permanent magnet.

[0016] Compared with the prior art, the present application has the following beneficial effects:

[0017] 1. In the present application, the iron ore raw material is subjected to dry magnetic separation of one rough and one fine through the use of the device on the basis of two-stage closed-circuit fine crushing process, which can effectively improve the iron grade of the final concentrate. Meanwhile, the plurality of rotating drums are rotatably arranged between the inner end wall of the cylinder and the arc-shaped permanent magnet, and the magnetic separation plates are arranged on the rotating drums, which enables the device to flexibly control the magnetic attraction strength of the arc-shaped permanent magnet acting on the cylindrical surface of the cylinder by adjusting the number of magnetic separation plates arranged between the inner end wall of the cylinder and the arc-shaped permanent magnet, effectively improves the versatility of a single dry drum magnetic separator, and effectively improves the convenience of the magnetic separation process implementation without the need for targeted customization of a plurality of dry drum magnetic separators with different magnetic attraction strengths in rough and fine multi-condition magnetic separation operations, thereby being conducive to reducing production costs and improving production efficiency to a certain extent.

[0018] 2. In the present application, the cylinder bodies of the adjacent two rotating drums are arranged in sliding fit, which enables the rotating drum on the inner side to support the rotating drum arranged on the outer side, and the outermost rotating drum is arranged in sliding fit with the inner end wall of the cylinder, so that the plurality of rotating drums can stably support the cylinder body in all directions, which is conducive to reducing the probability of damage to the cylindrical surface of the cylinder due to the impact of iron ore and prolonging the service life of the device to a certain extent. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and serve to explain the principles of the application. In the drawings:

[0020] Figure 1 isometric view of the structure of the present application;

[0021] Figure 2 isometric view of the cylinder and baffle of the present application;

[0022] Figure 3 isometric view of the arc-shaped permanent magnet, first lever and hydraulic telescopic rod of the present application;

[0023] Figure 4 isometric view of the rotating cylinder and driving mechanism of the present application;

[0024] Figure 5 exploded view of the first spline cylinder, second spline cylinder and spline shaft of the present application;

[0025] Figure 6 exploded view of the multiple rotating cylinders and reset mechanism of the present application;

[0026] Figure 7 isometric view of the shaft sleeve, fixed plate and positioning pin of the present application;

[0027] Figure 8 isometric view of the structure of the present application; Figure 1 top view of the structure of the present application;

[0028] Figure 9 isometric view of the structure of the present application; Figure 8 sectional view of the structure of the present application at A-A;

[0029] Figure 10 sectional view of the structure of the present application at B-B; Figure 8

[0030] left view of the structure of the present application; Figure 11 Figure 1 sectional view of the structure of the present application at C-C.

[0031] Figure 12 Figure 11 sectional view of the structure of the present application at C-C.

[0032] in the figure:

[0033] 1, frame; 11, cylinder; 12, first slot body; 13, second slot body; 14, first servo motor;

[0034] 2, shaft; 21, fan-shaped frame; 22, arc-shaped permanent magnet; 23, first lever; 24, hydraulic telescopic rod;

[0035] 3, rotating cylinder; 31, first shaft cylinder; 32, second shaft cylinder; 33, magnetic isolation plate; 34, non-magnetic plate;

[0036] ​​4, first gear; 41, first spline barrel; 42, second gear; 43, second spline barrel; 44, spline shaft; 45, jack; 46, plug; 47, second servo motor; 48, worm gear; 49, worm;

[0037] 5, shaft sleeve; 51, fixed plate; 52, tension spring; 53, clamping groove; 54, positioning pin;

[0038] 6, guide plate; 61, rotating shaft; 62, second lever; 63, fastening bolt;

[0039] 7, baffle. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all.

[0041] Embodiment: The embodiment provides a dry drum magnetic separator, referring to Figure 1 - Figure 12 Specifically, it comprises a rack 1, a drum 11 is rotatably installed in the rack 1, a first groove body 12 is fixedly installed at the bottom of the rack 1, a second groove body 13 is fixedly installed in the rack 1 and faces the drum 11, a first servo motor 14 is fixedly installed on the rack 1 and used to drive the drum 11 to rotate, a shaft rod 2 is installed in the rack 1 and penetrates the center axis of the drum 11, a fan-shaped frame 21 is fixedly installed on the shaft rod 2 and located in the drum 11, an arc-shaped permanent magnet 22 is fixedly installed on the fan-shaped frame 21 and faces the second groove body 13, a magnetic isolation mechanism is arranged between the drum 11 and the arc-shaped permanent magnet 22, the magnetic isolation mechanism comprises a plurality of rotating drums 3 which are coaxially arranged, a first shaft cylinder 31 is fixedly installed at the left end center position of the rotating drum 3, a plurality of first shaft cylinders 31 are sleeved with each other, a second shaft cylinder 32 is fixedly installed at the right end center position of the rotating drum 3, a magnetic isolation plate 33 is arranged on the cylindrical surface of the rotating drum 3, a non-magnetic plate 34 is arranged on the cylindrical surface of the rotating drum 3 and is located in the area other than the magnetic isolation plate 33, a driving mechanism is installed on the rack 1 and used to drive the plurality of rotating drums 3 to rotate, a guide plate 6 is installed in the rack 1 and arranged between the first groove body 12 and the second groove body 13, and the end of the guide plate 6 close to the second groove body 13 is arranged in a downwardly inclined structure.

[0042] The device is used in the dry separation process of iron ore. In the implementation process, low-grade iron-containing rocks are transported to the raw ore storage bin by car, transported to the medium crushing buffer bin by the vibrating feeder and the belt conveyor, and then fed into the cone crusher for medium crushing. The medium crushing products are transported to two circular vibrating screens for screening operation. The screened materials are transported to the fine crushing buffer bin, and then fed into two cone crushers for fine crushing. The fine crushing products are transported to the circular vibrating screen for screening operation, realizing a two-stage closed-circuit fine crushing process. The process can efficiently and stably deal with uncertain incoming material properties and quantities, control the particle size of the crushed products below 8mm, and create good conditions for improving the quality of dry magnetic separation of iron ore.

[0043] The undersize products are fed into a device by a belt conveyor for rough separation, the rough concentrate is transported to another device for fine separation, and the finally separated iron ore is transported to the ore yard, then loaded and unloaded by the front loader and transported by car. The remaining waste rock from rough and fine separation is stacked in the dump yard. The dry magnetic separation process of one rough and one fine can ensure that the final concentrate iron grade is above 25%. Based on this process, the dry drum magnetic separator in the present application is used for magnetic separation of iron ore. During use, one belt conveyor is connected above the cylinder 11 for feeding iron ore, one belt conveyor is connected below the first tank 12 for outputting screened ore, and one belt conveyor is connected below the second tank 13 for outputting waste rock.

[0044] During use of the device, the first servo motor 14 is powered on to drive the cylinder 11 to rotate continuously. Figure 9 The cylinder 11 is driven to rotate clockwise, and the iron ore raw material with a particle size below 8mm falls uniformly from the front position above the cylinder 11 and is dispersed on the cylindrical surface of the cylinder 11. Under the action of gravity and the rotation of the cylinder 11, the iron ore raw material slides down along the cylindrical surface of the front of the cylinder 11. In this process, the arc-shaped permanent magnet 22 installed inside the cylinder 11 performs magnetic separation on the iron ore raw material. With the magnetic attraction of the arc-shaped permanent magnet 22 to the iron ore, the high-iron-content ore adheres to the cylindrical surface of the cylinder 11. Under the continuous rotation of the cylinder 11, the high-iron-content ore is transported to the upper side of the first tank 12. When the high-iron-content ore passes over the arc-shaped permanent magnet 22, the magnetic attraction of the arc-shaped permanent magnet 22 to the iron ore is greatly weakened. At this time, under the action of gravity, the high-iron-content ore falls into the first tank 12, while the low-iron-content ore cannot be attracted and falls vertically downward into the second tank 13 under the guidance of the guide plate 6, completing the magnetic separation of the iron ore.

[0045] When the device is installed in different links, respectively, roughing or cleaning, the magnetic separation plate 33 can be made of ferrite or nickel-zinc ferrite according to actual needs, the non-magnetic plate 34 can be made of austenitic stainless steel, and the magnetic attraction strength of the arc-shaped permanent magnet 22 acting on the cylindrical surface of the cylinder 11 needs to be adjusted adaptively. At this time, the staff only needs to rotate the plurality of rotating drums 3 by driving mechanism, when the magnetic separation plate 33 arranged on the cylindrical surface of the rotating drum 3 rotates to the inner end wall of the cylinder 11 and the arc-shaped permanent magnet 22, the magnetic attraction strength of the arc-shaped permanent magnet 22 acting on the cylindrical surface of the cylinder 11 can be weakened, when the non-magnetic plate 34 arranged on the cylindrical surface of the rotating drum 3 rotates to the inner end wall of the cylinder 11 and the arc-shaped permanent magnet 22, it will not affect the magnetic attraction strength of the arc-shaped permanent magnet 22 acting on the cylindrical surface of the cylinder 11.

[0046] This makes the device can realize flexible control of the magnetic attraction strength of the arc-shaped permanent magnet 22 acting on the cylindrical surface of the cylinder 11 by adjusting the number of magnetic separation plates 33 blocked between the inner end wall of the cylinder 11 and the arc-shaped permanent magnet 22. When the number of magnetic separation plates 33 blocked between the inner end wall of the cylinder 11 and the arc-shaped permanent magnet 22 increases, the magnetic attraction strength of the arc-shaped permanent magnet 22 acting on the cylindrical surface of the cylinder 11 decreases, and when the number of magnetic separation plates 33 blocked between the inner end wall of the cylinder 11 and the arc-shaped permanent magnet 22 decreases, the magnetic attraction strength of the arc-shaped permanent magnet 22 acting on the cylindrical surface of the cylinder 11 increases. Without the need to customize a plurality of dry drum magnetic separators with different magnetic attraction strengths, the above structure setting greatly improves the versatility of a single dry drum magnetic separator, effectively improving the operation convenience.

[0047] In the specific implementation process, as shown in Figure 3 and Figure 11 , the shaft rod 2 is rotationally connected with the rack 1, and the end position of the shaft rod 2 is fixedly installed with the first lever 23, and the end of the first lever 23 is hingedly connected with the hydraulic telescopic rod 24 between the rack 1. When the device is used, the piston rod of the hydraulic telescopic rod 24 can be adjusted by being energized and started. Since the hydraulic telescopic rod 24 is hingedly connected between the first lever 23 and the rack 1, the first lever 23 can be pulled to control the rotation of the shaft rod 2 by the extension and retraction of the piston rod of the hydraulic telescopic rod 24, so as to rotate and adjust the position of the arc-shaped permanent magnet 22 by a small amplitude. By changing the relative position of the arc-shaped permanent magnet 22 and the cylindrical surface of the cylinder 11, the magnetic system deviation angle is adjusted, the magnetic field strength is locally optimized, and the effect of the staff using the device to magnetically select iron ore is ensured.

[0048] In the specific implementation process, as shown in Figure 9 and Figure 10As shown, the thickness of the magnetic separation plates 33 on the plurality of rotating drums 3 decreases layer by layer from the inside to the outside. When the plurality of rotating drums 3 are rotated, the magnetic separation plates 33 arranged on the cylindrical surface of the rotating drums 3 are sequentially rotated into or out of the space between the inner end wall of the cylinder 11 and the arc-shaped permanent magnet 22. When the thickness of the magnetic separation plates 33 in the space between the inner end wall of the cylinder 11 and the arc-shaped permanent magnet 22 gradually increases, the magnetic attraction strength of the arc-shaped permanent magnet 22 acting on the cylindrical surface of the cylinder 11 will decrease sharply. In the device, the thickness of the arc-shaped permanent magnet 22 arranged on the cylindrical surface of the plurality of rotating drums 3 is different, and the thickness decreases layer by layer from the inside to the outside. By controlling the thickness of the magnetic separation plates 33, the magnetic attraction strength of the arc-shaped permanent magnet 22 acting on the cylindrical surface of the cylinder 11 decreases at the same rate when one magnetic separation plate 33 is sequentially added, and the magnetic attraction strength of the arc-shaped permanent magnet 22 acting on the cylindrical surface of the cylinder 11 increases at the same rate when one magnetic separation plate 33 is sequentially removed. Therefore, the device can realize linear control of the magnetic attraction strength of the arc-shaped permanent magnet 22 acting on the cylindrical surface of the cylinder 11 by rotating the plurality of rotating drums 3, and the convenience of operation of the device during actual use is improved to a certain extent.

[0049] In the specific implementation process, as shown in Figure 9 and Figure 10 , the cylinder walls of adjacent two rotating drums 3 are in sliding fit, the cylinder wall of the outermost rotating drum 3 is in sliding fit on the inner end wall of the cylinder 11, and the cylinder wall of the innermost rotating drum 3 is in sliding fit with the arc-shaped permanent magnet 22. When the device is used, the plurality of rotating drums 3 are sleeved with each other, and the cylinder bodies of adjacent two rotating drums 3 are in sliding fit. This makes the rotating drum 3 on the inside support the rotating drum 3 sleeved on the outside, and the outermost rotating drum 3 supports the cylinder body of the cylinder 11. Through mutual cooperation, the stability of the cylinder body of the cylinder 11 supported can be effectively improved, which is beneficial to reducing the probability of the cylindrical surface of the cylinder 11 being dented and damaged by collision and knocking of iron ore, and prolonging the service life of the device to a certain extent.

[0050] In the specific implementation process, as shown in Figure 4 - Figure 7 , Figure 10 and Figure 12As shown, the driving mechanism comprises a first gear 4 fixedly installed at the end position of the first shaft cylinder 31, a plurality of coaxially arranged first spline cylinders 41 are rotationally installed on the rack 1, a second gear 42 is fixedly installed on each first spline cylinder 41, a plurality of second gears 42 are correspondingly arranged with a plurality of first gears 4 and are in meshing relationship with each other, a second spline cylinder 43 coaxially arranged with the first spline cylinder 41 is fixedly installed on the rack 1, and a spline shaft 44 is slidingly inserted into the second spline cylinder 43, the outer dimension of the spline shaft 44 is adapted to the inner dimension of the first spline cylinder 41, a plurality of insertion holes 45 are formed in the spline shaft 44, an insertion pin 46 adapted to the insertion hole 45 is inserted into the end position of the second spline cylinder 43, and a second servo motor 47 is fixedly installed on the rack 1.

[0051] The teeth on the first gear 4 are arranged only in half a circle, a plurality of reset mechanisms are installed on the right side of the plurality of rotating cylinders 3, and each reset mechanism comprises an axle sleeve 5 movably sleeved on the outer side of the right end of the shaft 2 and rotationally installed in the cylinder 11, the axle sleeve 5 is fixedly connected with the rack 1, a fixed plate 51 correspondingly arranged with the plurality of rotating cylinders 3 is fixedly installed on the axle sleeve 5, and a tension spring 52 is fixedly connected between the fixed plate 51 and the corresponding rotating cylinder 3.

[0052] When the device is in use, the rotating driving of the plurality of rotating cylinders 3 is from inside to outside in the process of using the driving mechanism to rotationally drive the plurality of rotating cylinders 3, when it is needed to control the rotation of the rotating cylinder 3 at the innermost side, the staff member pushes the spline shaft 44 into the first spline cylinder 41, so that the spline shaft 44 inserted into the second spline cylinder 43 is inserted into the first first spline cylinder 41, when the second spline cylinder 43 is rotationally driven by the energization of the second servo motor 47, the first first spline cylinder 41 can be rotationally driven through the transmission connection of the spline shaft 44, so as to synchronously rotate the second gear 42 fixedly installed thereon, and then the rotating cylinder 3 connected therewith is rotationally driven through the meshing of the second gear 42 and the corresponding first gear 4, since the teeth on the first gear 4 are arranged only in half a circle, when the second gear 42 is out of engagement with the teeth on the corresponding first gear 4, the first gear 4 cannot be rotationally driven in the process of the second gear 42 being continuously rotationally driven, at this time, the magnetic shielding plate 33 is just moved to between the inner end wall of the cylinder 11 and the arc-shaped permanent magnet 22, so as to block the magnetic attraction strength of the arc-shaped permanent magnet 22 acting on the cylindrical surface of the cylinder 11, when it is needed to control the rotation of the two rotating cylinders 3 at the inner side, the staff member only needs to further push the spline shaft 44, so that the spline shaft 44 is inserted into the first and second first spline cylinders 41, to rotationally drive the two second gears 42, so as to control the rotation of the two rotating cylinders 3 at the inner side, and the magnetic shielding plate 33 arranged on the cylindrical surface thereof is rotated to between the inner end wall of the cylinder 11 and the arc-shaped permanent magnet 22, therefore, the device only needs to gradually push the spline shaft 44 to be inserted into the plurality of first spline cylinders 41, so as to realize the rotation control of the plurality of rotating cylinders 3, and the magnetic shielding plates 33 on the cylindrical surfaces of the plurality of rotating cylinders 3 are gradually moved to between the inner end wall of the cylinder 11 and the arc-shaped permanent magnet 22.

[0053] When it is necessary to enhance the magnetic attraction strength of the arc-shaped permanent magnet 22 acting on the cylindrical surface of the cylinder 11, the staff only needs to pull the spline shaft 44 outward, gradually reducing the number of the first spline barrels 41 inserted with the spline shaft 44, and when the spline shaft 44 is no longer inserted in the first spline barrel 41, the second gear 42 is no longer driven to rotate, at this time, the corresponding rotating drum 3 can be reversely rotated by the elastic pulling of the tension spring 52 on the fixed plate 51 to the rotating drum 3, so as to restore the initial state, so that the magnetic separation plate 33 moves away, and the non-magnetic plate 34 rotates to the inner end wall of the cylinder 11 and the arc-shaped permanent magnet 22, no longer blocking the magnetic attraction strength of the arc-shaped permanent magnet 22 acting on the cylindrical surface of the cylinder 11, so that the magnetic attraction strength of the arc-shaped permanent magnet 22 acting on the cylindrical surface of the cylinder 11 is increased. The cooperation of the driving mechanism and the reset mechanism makes the staff can flexibly and stably rotate and reverse rotate and reset the multiple rotating drums 3 that are sleeved with each other, which is convenient for controlling the positions of the magnetic separation plates 33 and the spline shafts 44 on the cylindrical surfaces of the multiple rotating drums 3 according to the needs, and the staff can judge the position state of the multiple magnetic separation plates 33 according to the insertion condition of the spline shafts 44, which can effectively improve the use convenience of the device.

[0054] In the specific implementation process, as shown in Figure 4 , Figure 5 and Figure 12 , the second spline barrel 43 is fixedly installed with a worm gear 48, and the outer side of the worm gear 48 is meshingly connected with a worm 49, and the worm 49 is fixedly installed on the driving shaft of the second servo motor 47. When the device is in use, the worm gear 48 is fixedly installed on the second spline barrel 43, and the worm 49 meshing with the worm gear 48 is fixedly installed on the driving shaft of the second servo motor 47, so that when the second servo motor 47 is energized and started, the worm 49 is first driven to rotate, and then the worm gear 48 is driven to rotate the second spline barrel 43 under the meshing of the teeth. The self-locking formed by the meshing transmission between the worm 49 and the worm gear 48 makes the second spline barrel 43 unable to rotate when the second servo motor 47 is not started, so that the rotating drum 3 is automatically kept in a position-stable state after being rotated and adjusted by the driving mechanism, which can effectively ensure the stability of the device in use.

[0055] In the specific implementation process, as shown in Figure 6 and Figure 7As shown, the second shaft cylinder 32 is provided with a clamping groove 53, and the shaft sleeve 5 is fixedly provided with a positioning pin 54 arranged in the clamping groove 53. When the device is used, the clamping groove 53 and the positioning pin 54 can control the amplitude of the rotation of the rotating cylinder 3, so that the rotating cylinder 3 can be controlled to be accurately blocked between the inner end wall of the cylinder 11 and the arc-shaped permanent magnet 22, which is beneficial to guarantee the accuracy of the magnetic attraction strength of the arc-shaped permanent magnet 22 acting on the cylindrical surface of the cylinder 11, and further beneficial to guarantee the stability of the device in actual use.

[0056] In the specific implementation process, as shown in Figure 1 、 Figure 8 、 Figure 9 and Figure 11 , the rotating shaft 61 is rotatably installed in the rack 1, and the rotating shaft 61 is fixedly connected with the guide plate 6. The end position of the rotating shaft 61 is fixedly provided with a second lever 62, and the end position of the second lever 62 is provided with a fastening bolt 63. When the device is used, the operator can rotate the rotating shaft 61 by pulling the second lever 62, so as to adjust the inclination angle of the guide plate 6. By rotating and adjusting the guide plate 6, the gap between the guide plate 6 and the cylindrical surface of the cylinder 11 can be flexibly adjusted, so as to adapt to the guidance of different specifications of ore particles, which is beneficial to improve the application range of the device. By installing the fastening bolt 63 at the end position of the second lever 62, the position of the guide plate 6 can be fixed after the inclination angle is adjusted, which is flexible and convenient to operate, and guarantees the stability of the guide plate 6 in use.

[0057] In the specific implementation process, as shown in Figure 1 、 Figure 2 、 Figure 10 and Figure 12 , the left and right sides of the cylindrical surface of the cylinder 11 are fixedly provided with the surrounding baffles 7. The left baffle 7 is located to the right of the left edge position of the arc-shaped permanent magnet 22, and the right baffle 7 is located to the left of the right edge position of the arc-shaped permanent magnet 22. When the device is used, the baffle 7 is made of magnetic material. By installing the surrounding baffles 7 on the left and right sides of the cylindrical surface of the cylinder 11, the actual working area of the device can be marked. By separating the edge positions on the left and right sides of the arc-shaped permanent magnet 22 with the baffle 7, the interference of uneven magnetic attraction strength of the edge position of the arc-shaped permanent magnet 22 on the magnetic separation of iron ore can be avoided, which is beneficial to guarantee the stability of the device in operation.

[0058] Specifically, the working principle of the present application is as follows:

[0059] The position of the magnetic isolation plate 33 on the cylindrical surface of the plurality of rotating drums 3 is adjusted by the cooperation of the driving mechanism and the reset mechanism, the number of rotating drums 3 is controlled as required, the number of spline shafts 44 inserted into the first spline barrels 41 is adjusted, after the second servo motor 47 is energized and started, the second spline barrel 43 and the spline shaft 44 are driven to rotate by the meshing transmission of the worm 49 and the worm gear 48, and then the plurality of first spline barrels 41 connected with the spline shaft 44 are driven to rotate, the rotating drums 3 connected with the first spline barrels 41 are driven to rotate by the meshing of the second gear 42 and the corresponding first gear 4, since only half a circle of teeth is arranged on the first gear 4, when the second gear 42 meshes with the teeth on the corresponding first gear 4, the second gear 42 continues to rotate, the first gear 4 cannot be driven to rotate, at this time, the magnetic isolation plate 33 on the corresponding rotating drum 3 moves to between the inner end wall of the cylinder 11 and the arc-shaped permanent magnet 22, the magnetic attraction strength of the arc-shaped permanent magnet 22 acting on the cylindrical surface of the cylinder 11 is weakened, and the rotating drum 3 corresponding to the first spline barrel 41 not inserted by the spline shaft 44 keeps a stable state under the elastic pulling of the tension spring 52, in this state, the non-magnetic plate 34 on the corresponding rotating drum 3 is between the inner end wall of the cylinder 11 and the arc-shaped permanent magnet 22, and the magnetic attraction strength of the arc-shaped permanent magnet 22 acting on the cylindrical surface of the cylinder 11 does not constitute an influence, by adjusting the number of magnetic isolation plates 33 moving to between the inner end wall of the cylinder 11 and the arc-shaped permanent magnet 22, the magnetic attraction strength of the arc-shaped permanent magnet 22 acting on the cylindrical surface of the cylinder 11 is flexibly adjusted according to the working condition requirements, and the device is used to select appropriate magnetic attraction strength in different working links to perform roughing and cleaning operations on iron ore.

[0060] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can make equivalent replacement or change according to the technical solution and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A dry drum magnetic separator comprising a frame (1), characterized in that: The frame (1) is rotatably installed with a cylinder (11), the bottom of the frame (1) is fixedly installed with a first groove body (12), the frame (1) is fixedly installed with a second groove body (13), the frame (1) is fixedly installed with a first servo motor (14), the frame (1) is installed with a shaft rod (2) penetrating through the central axis of the cylinder (11), and the shaft rod (2) is fixedly installed with a sector frame (21) located in the cylinder (11), the sector frame (21) is fixedly installed with an arc-shaped permanent magnet (22), a magnetic separation mechanism is arranged between the cylinder (11) and the arc-shaped permanent magnet (22), and the magnetic separation mechanism comprises a plurality of rotating cylinders (3) which are coaxially arranged, a first shaft cylinder (31) is fixedly installed at the left end center position of the rotating cylinder (3), the first shaft cylinders (31) are sleeved with each other, a second shaft cylinder (32) is fixedly installed at the right end center position of the rotating cylinder (3), a magnetic separation plate (33) is arranged on the cylindrical surface of the rotating cylinder (3), the non-magnetic plate (33) area of the cylindrical surface of the rotating cylinder (3) is arranged as a non-magnetic plate (34), the frame (1) is installed with a driving mechanism for driving the plurality of rotating cylinders (3) to rotate, the frame (1) is installed with a guide plate (6) arranged between the first groove body (12) and the second groove body (13), and the end of the guide plate (6) close to the second groove body (13) is arranged in a downwardly inclined structure. The thickness of the magnetic separation plate (33) on the plurality of rotating cylinders (3) decreases layer by layer from inside to outside, the magnetic attraction strength of the arc-shaped permanent magnet (22) acting on the cylindrical surface of the cylinder (11) decreases by the same amplitude every time the magnetic separation plate (33) is sequentially increased on the outer side of the arc-shaped permanent magnet (22), the magnetic attraction strength of the arc-shaped permanent magnet (22) acting on the cylindrical surface of the cylinder (11) increases by the same amplitude every time the magnetic separation plate (33) is sequentially reduced on the outer side of the arc-shaped permanent magnet (22), and the magnetic attraction strength of the arc-shaped permanent magnet (22) acting on the cylindrical surface of the cylinder (11) is stepwise and quantitatively adjusted by controlling the rotation of the plurality of rotating cylinders (3).

2. A dry drum magnetic separator according to claim 1, characterized in that: The shaft rod (2) is rotatably connected with the frame (1), and a first shifting rod (23) is fixedly installed at the end position of the shaft rod (2), and a hydraulic telescopic rod (24) is hinged between the end of the first shifting rod (23) and the frame (1).

3. A dry drum magnetic separator as claimed in claim 1, wherein: The cylinder walls of two adjacent rotating cylinders (3) are slidably attached, the cylinder wall of the outermost rotating cylinder (3) is slidably attached to the inner end wall of the cylinder (11), and the cylinder wall of the innermost rotating cylinder (3) is slidably attached to the arc-shaped permanent magnet (22).

4. A dry drum magnetic separator as claimed in claim 1, wherein: The driving mechanism comprises a first gear (4) fixedly installed at the end position of the first shaft cylinder (31), a plurality of coaxially arranged first spline cylinders (41) are rotationally installed on the frame (1), a second gear (42) is fixedly installed on each of the first spline cylinders (41), a plurality of the second gears (42) are correspondingly arranged with the plurality of first gears (4) and are in meshing engagement with each other, a second spline cylinder (43) coaxially arranged with the first spline cylinder (41) is fixedly installed on the frame (1), and a spline shaft (44) is slidingly inserted into the second spline cylinder (43), the outer dimension of the spline shaft (44) is adapted to the inner dimension of the first spline cylinder (41), a plurality of insertion holes (45) are uniformly arranged in the spline shaft (44), a plug (46) adapted to the insertion hole (45) is inserted into the end position of the second spline cylinder (43), and a second servo motor (47) is fixedly installed on the frame (1).

5. A dry drum magnetic separator according to claim 4, characterised in that: A worm gear (48) is fixedly installed on the second spline cylinder (43), and a worm (49) is in meshing connection with the outer side of the worm gear (48), and the worm (49) is fixedly installed on the driving shaft of the second servo motor (47).

6. A dry drum magnetic separator according to claim 4, wherein: Only half a circle of teeth is arranged on the first gear (4), a reset mechanism is installed on the right side of the plurality of rotating cylinders (3), the reset mechanism comprises an axle sleeve (5) movably sleeved on the outer side of the right end of the shaft rod (2) and rotationally installed in the cylinder (11), the axle sleeve (5) is fixedly connected with the frame (1), a fixed plate (51) correspondingly arranged with the plurality of rotating cylinders (3) is fixedly installed on the axle sleeve (5), and a tension spring (52) is fixedly connected between the fixed plate (51) and the corresponding rotating cylinder (3).

7. A dry drum magnetic separator according to claim 6, characterised in that: A clamping groove (53) is arranged on the second shaft cylinder (32), and a positioning pin (54) fixedly installed on the axle sleeve (5) is arranged on the inner side of the clamping groove (53).

8. A dry drum magnetic separator as claimed in claim 1, wherein: A rotating shaft (61) is rotationally installed in the frame (1) and fixedly connected with the guide plate (6), a second lever (62) is fixedly installed at the end position of the rotating shaft (61), and a fastening bolt (63) is installed at the end position of the second lever (62).

9. A dry drum magnetic separator as claimed in claim 1, wherein: The left and right sides of the cylindrical surface of the cylinder (11) are fixedly installed with the circumferentially arranged baffles (7), the left baffle (7) is located to the right of the left edge position of the arc-shaped permanent magnet (22), and the right baffle (7) is located to the left of the right edge position of the arc-shaped permanent magnet (22).

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