CN212524537U - Medium magnetic separator for screening iron ore - Google Patents

Abstract

The utility model relates to a well magnetic separator is selected for use in iron ore screening, it includes the organism, and the organism is kept away from the position fixedly connected with that ground one end is close to the lateral wall and is given the ore device, is provided with the separation subassembly for the ore device below, selects separately the subassembly and rotates with the organism to be connected, selects separately the subassembly below and is provided with the recovery subassembly, retrieves the subassembly below and is provided with conveying assembly, retrieves the subassembly and has the overlap section with the vertical direction of conveying assembly. The mineral aggregate that treats the screening gets into the organism from advancing the ore device, carries out preliminary separation through sorting module, and most iron ore are adsorbed on sorting module, and iron ore drops on retrieving the subassembly under sorting module's drive. And the rest materials continuously fall onto the conveying assembly under the action of gravity, the rest materials are driven by the conveying assembly to move towards the lower part of the recovery assembly, and when the rest materials move to the lower part of the recovery assembly, the recovery assembly screens the rest materials again. The utility model discloses the effect that the concentrate rate of recovery is high, the precision is high has.

Description

Medium magnetic separator for screening iron ore

Technical Field

The utility model belongs to the technical field of the technique of magnet separator and specifically relates to a middle magnetic separator is used in iron ore screening.

Background

The magnetic separator is a screening device for removing iron powder and the like used in the reuse of powdery granules. After the ore pulp flows into the tank body through the ore feeding box, under the action of water flow of the ore feeding spray pipe, ore particles enter an ore feeding area of the tank body in a loose state. Under the action of the magnetic field, magnetic particles are magnetically aggregated to form magnetic groups or magnetic chains, and the magnetic groups or the magnetic chains are moved to the magnetic poles under the action of magnetic force in the ore pulp and are adsorbed on the cylinder. Because the polarities of the magnetic poles are alternately arranged along the rotating direction of the cylinder and are fixed during working, when the magnetic groups or the magnetic chains rotate along with the cylinder, the magnetic stirring phenomenon is generated due to the alternation of the magnetic poles, the nonmagnetic minerals such as gangue and the like which are mixed in the magnetic groups or the magnetic chains are separated during turning, and finally the magnetic groups or the magnetic chains which are absorbed on the surface of the cylinder are concentrate.

At present, the utility model with the publication number of CN203540699U discloses an improved permanent magnetic drum type middle magnetic separator, which comprises a feeding hopper, a permanent magnetic system, a drum and a separation groove, wherein the permanent magnetic system is arranged in the drum, the separation groove is arranged below the drum, the middle part of the bottom surface of the separation groove is provided with a tailing discharge port, one side of the separation groove is provided with a concentrate hopper, the feeding hopper is arranged above the other side of the separation groove, a plurality of water pipes for flushing and dispersing are distributed on the bottom surface of the separation groove close to the feeding hopper, and the pipe orifices of the water pipes for flushing and dispersing face the surface of the drum positioned above; and a washing water pipe is arranged above the concentrate hopper, and the pipe orifice of the washing water pipe faces the surface of the roller positioned on one side of the concentrate hopper.

The above prior art solutions have the following drawbacks: the ore material falls to the cylinder probably because of the momentum is great, leads to on magnetic force is not enough with its absorption cylinder, perhaps will adsorb the iron ore thing on the cylinder originally and hit down, leads to partial iron ore can not be screened out, and the rate of recovery is low.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a well magnetic separator is selected for use to iron ore, and it has the characteristics that the concentrate rate of recovery is high, the precision is high to the not enough of prior art existence.

In order to achieve the above purpose, the utility model provides a following technical scheme: a middle magnetic separator for screening iron ores comprises a machine body, wherein the machine body is a cuboid shell, one end of the machine body close to the ground is fixedly connected with a rack, one end of the machine body far away from the ground is close to a position fixedly connected with ore feeding device of a side wall, the ore feeding device is communicated with the machine body, a separation assembly is rotationally connected in the machine body and is located below the ore feeding device, a recovery assembly is vertically and fixedly connected between two side walls of the machine body and comprises two rotating rollers which are horizontally arranged, the two rotating rollers are respectively a first rotating roller and a second rotating roller, the first rotating roller and the second rotating roller are respectively rotationally connected with two side walls of the machine body, the outer wall of the first rotating roller is coated with a first magnetic system, the first rotating roller is located below the separation assembly, and a first belt is sleeved between the two rotating rollers in a transmission manner, a second magnetic system is arranged in a ring surrounded by the first belt and fixedly connected with two side walls of the machine body, the second magnetic system is close to the upper end of the first belt, a conveying assembly is rotatably connected between the two side walls of the machine body at a position close to the ground and comprises a third rotating roller and a fourth rotating roller which are horizontally arranged, the third rotating roller and the fourth rotating roller are respectively rotatably connected with the two side walls of the machine body in the width direction, the third rotating roller is positioned at the connecting position of the side wall of the machine body close to the separation assembly and one end of the machine body close to the ground, the fourth rotating roller is positioned below the middle position of the recovery assembly, a second belt is sleeved between the third rotating roller and the fourth rotating roller in a transmission manner, one end of the machine body close to the ground is fixedly connected with a concentrate discharging assembly, and the concentrate discharging assembly is positioned at one side of the second rotating roller far away from the first rotating roller, one end of the machine body, which is close to the ground, is fixedly connected with a tailing discharging assembly, and the tailing discharging assembly is positioned on one side, which is far away from the third rotating roller, of the fourth rotating roller.

Through adopting above-mentioned technical scheme, the mineral aggregate that treats the screening gets into the organism from the ore feeding device, carries out preliminary separation through sorting assembly, and most iron ore is adsorbed on sorting assembly, and iron ore drops on first belt under sorting assembly's drive. All the other materials continue to fall to the second belt of conveying component under the action of gravity, the third rotating roller and the fourth rotating roller rotate to drive the first belt to rotate, all the other materials move to the lower side of the recovery component under the drive of the second belt, when the lower side of the recovery component is moved, the iron ores in all the other materials are adsorbed on the first belt under the magnetic action of the second magnetic system and the third magnetic system, the first belt drives the primarily selected iron ores and the iron ores adsorbed from the conveying component to move towards the direction of the concentrate discharging component, and the iron ores leave the magnetic separator through the concentrate discharging component. The rest materials are driven by the conveying assembly to leave the magnetic separator through the tailing discharging assembly.

The utility model discloses further set up to: the sorting assembly comprises a rotary drum which is rotatably connected with the machine body, a third magnetic system is arranged in the rotary drum, the third magnetic system is fixedly connected with two side walls of the machine body, and the third magnetic system and the rotary drum rotate relatively.

Through adopting above-mentioned technical scheme, treat that the mineral aggregate of screening drops on the rotary drum, and iron ore in the mineral aggregate is adsorbed on the rotary drum with the coincidence of third magnetism system on the surface, and the rotary drum rotates and drives the iron ore removal, when iron ore leaves the rotary drum and the coincidence of third magnetism system region, iron ore breaks away from the rotary drum surface.

The utility model discloses further set up to: the conveying direction of one end, far away from the ground, of the recovery assembly is the horizontal direction from the first rotating roller to the second rotating roller.

Through adopting above-mentioned technical scheme, the iron ore that the separation subassembly was selected separately directly moves to the direction of concentrate ejection of compact subassembly through the terminal surface that first belt kept away from ground, has improved the separation efficiency of magnet separator.

The utility model discloses further set up to: and a fourth magnetic system is arranged in a ring surrounded by the first belt and fixedly connected with two side walls of the machine body, and the fourth magnetic system is close to the lower end of the first belt.

Through adopting above-mentioned technical scheme, the inner wall of keeping away from ground one end at first belt is provided with the fourth magnetic system, makes the process of first belt transport iron ore more steady, and the appeal is applyed to the iron ore of sorting the completion through sorting the subassembly to the fourth magnetic system simultaneously, makes the iron ore of sorting the completion accurately fall on first belt, has improved the efficiency of magnet separator.

The utility model discloses further set up to: the feeding device comprises an ore feeding pipe, the ore feeding pipe is fixedly connected with the machine body, the ore feeding pipe is fixedly connected with an ore discharging pipe, the longitudinal section of the ore discharging pipe is isosceles trapezoid, and the small end face of the ore discharging pipe is fixedly connected with the ore feeding pipe.

Through adopting above-mentioned technical scheme, it is more convenient when making the ore drawing, improves the pressure in advancing the ore pipe simultaneously, makes and advances the ore more smooth and easy.

The utility model discloses further set up to: the inner wall of the upper end of the machine body is fixedly connected with a guide plate, one end of the guide plate is fixedly connected with the inner wall of the machine body, and the other end of the guide plate points to the axis of the rotary drum.

Through adopting above-mentioned technical scheme, utilize the deflector guide to treat that the mineral aggregate of screening flows to the direction of selecting separately the subassembly, avoids treating that the mineral aggregate of screening directly falls on conveying component under the action of gravity, further improves the separation efficiency of magnet separator.

The utility model discloses further set up to: the concentrate discharging assembly comprises a collecting tank, the cross section of the collecting tank is trapezoidal, the large trapezoidal end face is close to the second rotating roller, the small trapezoidal end face is close to the ground, the small end face of the trapezoidal groove is close to one end, close to the ground, of the collecting pipe, the collecting pipe is fixedly connected with one end, close to the ground, of the machine body in a perpendicular mode, and the collecting pipe is communicated with the outside of the machine body.

Through adopting above-mentioned technical scheme, the cross-section of collecting vat is trapezoidal, has increased the receiving area that the collecting vat received iron ore, and iron ore can be accurate must be followed first belt and is close to second live-rollers one end and fall into concentrate ejection of compact subassembly.

The utility model discloses further set up to: the tailing ejection of compact subassembly includes the ore blocking plate that is close to the perpendicular fixed connection of inner wall of ground one end with the organism, ore blocking plate is located the fourth live-rollers and keeps away from third live-rollers one side, the organism is close to ground one end and has seted up the ore outlet, the ore outlet is located the intermediate position of fourth live-rollers and ore blocking plate horizontal direction.

Through adopting above-mentioned technical scheme, utilize the ore blocking board to make and can all fall into out the ore mouth through the tailing that output assembly carried, avoid the tailing to be detained at the condition that the organism is close to ground one end.

The utility model discloses further set up to: one end of the frame, which is close to the ground, is fixedly connected with a rubber shock pad.

Through adopting above-mentioned technical scheme, the rubber shock pad has good inhaling the shake effect, has avoided producing great noise because the base is direct to contact with ground.

To sum up, the utility model discloses a following beneficial technological effect:

1. the mineral aggregate to be screened drops on the conveying assembly after the primary sorting of the sorting assembly, and is screened again through the recovery assembly, so that the waste of raw materials is reduced, and the screening efficiency is improved.

2. The iron ores sorted for the first time and the iron ores sorted for the second time are conveyed in the same direction of the concentrate discharging assembly through the recycling assembly, and the inner space of the machine body is saved.

3. Through being close to ground one end fixed connection rubber shock pad at the frame, utilize rubber shock pad to have good shock absorption effect, avoided producing great noise because the frame is direct and ground contact.

Drawings

FIG. 1 is a schematic view of the overall structure of the present embodiment;

FIG. 2 is a schematic view of the internal structure of the present embodiment;

FIG. 3 is an enlarged partial schematic view of portion A of FIG. 2;

fig. 4 is a schematic cross-sectional structure diagram of the present embodiment.

Reference numerals: 100. a body; 200. a frame; 210. a rubber shock pad; 300. a feeding device; 310. an ore inlet pipe; 320. placing an ore tube; 400. a sorting assembly; 410. a rotating drum; 420. a third magnetic system; 430. a first motor; 500. a recovery assembly; 510. a first rotating roller; 520. a second rotating roller; 530. a first magnetic system; 540. a first belt; 550. a second magnetic system; 560. a fourth magnetic system; 570. a second motor; 600. a delivery assembly; 610. a third rotating roller; 620. a fourth rotating roller; 630. a second belt; 640. a third motor; 700. a concentrate discharge assembly; 710. collecting tank; 720. a collection pipe; 800. a tailing discharging assembly; 810. a mineral baffle; 820. an ore outlet; 900. a guide plate.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

A middle magnetic separator for screening iron ores, as shown in fig. 1 and 2, comprises a machine body 100, wherein one end, close to the ground, of the machine body 100 is fixedly connected with a machine frame 200, and one end, close to the ground, of the machine frame 200 is fixedly connected with a rubber shock pad 210. An ore feeding device 300 is fixedly connected to one side of the upper end of the machine body 100. The machine body 100 is a rectangular parallelepiped case, and as shown in fig. 1, the feeder 300 is located at the right side of the machine body 100 in the length direction. The ore feeding device 300 is provided with below and selects separately the subassembly 400, selects separately the subassembly 400 and is connected with the organism 100 rotation, selects separately the subassembly 400 and is used for carrying out the screening for the mineral for the first time. Sorting module 400 below is provided with retrieves subassembly 500, and sorting module 400 is connected with organism 100 width direction's both sides wall, and it is used for the second time screening to mineral, retrieves subassembly 500 below and is provided with conveying component 600, and the one end that retrieves subassembly 500 is close to sorting module has the overlap with the vertical direction of conveying component 600. The side of the recovery assembly 500 far away from the separation assembly 400 is provided with a concentrate discharging assembly 700, and the side of the conveying assembly 600 near the concentrate discharging assembly 700 is provided with a tailing discharging assembly 800. The mineral aggregate that treats the screening gets into organism 100 from the ore feeding device, selects separately the subassembly 400 through selecting separately and carries out preliminary sorting, and most iron ore is adsorbed on selecting separately the subassembly 400, and iron ore drops on retrieving the subassembly 500 under the drive of selecting separately the subassembly 400. All the other materials continue to fall to the conveying assembly 600 under the action of gravity, all the other materials move to the lower part of the recovery assembly 500 under the driving of the conveying assembly 600, when the materials move to the lower part of the recovery assembly 500, the recovery assembly 500 screens the materials again, the recovery assembly 500 drives the primarily selected iron ores and the iron ores screened again from the conveying assembly 600 to move towards the concentrate discharging assembly 700, and the iron ores leave the magnetic separator through the concentrate discharging assembly 700. The rest materials are driven by the conveying assembly 600 to leave the magnetic separator through the tailing discharging assembly 800.

As shown in fig. 2, the feeding device 300 includes an ore feeding pipe 310, the ore feeding pipe 310 is fixedly connected to the upper end of the machine body 100, and the ore feeding pipe 310 is communicated with the interior of the machine body 100. One end of the ore feeding pipe 310, which is far away from the machine body 100, is fixedly connected with an ore placing pipe 320, the longitudinal section of the ore placing pipe 320 is isosceles trapezoid, and the small end face of the ore placing pipe 320 is fixedly connected with the ore feeding pipe 310. Through the longitudinal section design that will put ore pipe 320 for isosceles trapezoid, increased the area of ore drawing, it is more convenient when making the ore drawing, make and advance the ore deposit more smoothly.

As shown in fig. 2, the sorting assembly 400 includes a drum 410, and the drum 410 is rotatably connected to both side walls in the width direction of the body 100. The side wall of the machine body 100 is fixedly connected with a first motor 430 (see fig. 1), the first motor 430 drives the rotary drum 410 to rotate, a third magnetic system 420 is arranged in the rotary drum 410, the third magnetic system 420 is formed by arranging high-performance neodymium-iron-boron magnetic blocks, the third magnetic system 420 is arranged at a position, close to the ore feeding device 300, of the rotary drum 410, the third magnetic system 420 is fixedly connected with the side wall of the machine body 100 in the width direction, and the third magnetic system 420 and the rotary drum 410 rotate relatively. After the mineral aggregate enters the machine body 100, the iron ore in the mineral aggregate is adsorbed on the rotary drum 410 through the third magnetic system 420, the iron ore is driven to move towards the recovery assembly 500 through the rotation of the rotary drum 410, the attraction force of the third magnetic system 420 to the iron ore is gradually reduced along with the movement of the iron ore, and the iron ore falls off from the outer wall of the rotary drum 410 and falls onto the recovery assembly 500.

As shown in fig. 2, a guide plate 900 is fixedly connected to an inner wall of the machine body 100 at an end far from the ground, and one end of the guide plate 900 is fixedly connected to the inner wall of the machine body 100; the other end is directed toward the axis of the drum 410. The guide plate 900 is used for guiding the mineral aggregate to be screened to flow towards the sorting assembly 400, so that the mineral aggregate to be screened is prevented from directly falling onto the conveying assembly 600 under the action of gravity, and the sorting efficiency of the magnetic separator is further improved.

As shown in fig. 2 and 3, the recycling assembly 500 includes two horizontally disposed rotating rollers, the two rotating rollers are respectively a first rotating roller 510 and a second rotating roller 520, the first rotating roller 510 and the second rotating roller 520 are respectively rotatably connected with two side walls of the machine body 100 in the width direction, the outer wall of the first rotating roller 510 is wrapped with a first magnetic system 530, the first rotating roller 510 is located below the sorting assembly 400, the second rotating roller 520 is located in the direction in which the first rotating roller 510 is far away from the sorting assembly 400, and a first belt 540 is sleeved between the two rotating rollers in a transmission manner. A second motor 570 (see fig. 1) is fixedly connected to a sidewall of the machine body 100, and the second motor 570 drives the first rotating roller 510 to rotate. Recovery assembly 500 further includes a second magnetic system 550 and a fourth magnetic system 560, both of which are plate-shaped and both of which are located within the loop defined by first belt 540, second magnetic system 550 being located proximate to the upper portion of first belt 540 and fourth magnetic system 560 being located proximate to the lower portion of first belt 540. The second magnetic system 550 is formed by arranging high-performance neodymium iron boron magnetic blocks, and the second magnetic system 550 is fixedly connected with two side walls of the machine body 100 in the width direction. The second magnetic system 550 performs secondary screening on the ore material on the lower conveying assembly 600, and adsorbs the iron ore in the ore material onto the surface of the end, close to the ground, of the first belt 540. The first rotating roller 510 and the second rotating roller 520 rotate to drive the first belt 540 to move, thereby driving the iron ores on the first belt 540 to move toward the concentrate recovery assembly 500. The conveying direction of the end of the recovery unit 500 away from the ground is a horizontal direction from the first rotating roller 510 to the second rotating roller 520. The end face of the iron ore separated by the separation component 400 and directly far away from the ground through the first belt 540 moves towards the direction of the concentrate discharging component 700, so that the separation efficiency of the magnetic separator is improved. Fourth magnetic system 560 and organism 100 width direction's both sides wall fixed connection, through set up fourth magnetic system 560 in the position that is close to first belt 540 lower part, make the process that first belt 540 carried iron ore more steady, fourth magnetic system 560 exerts the appeal to the iron ore of sorting the completion through sorting subassembly 400 simultaneously, makes the iron ore of sorting the completion accurately fall onto first belt 540, has improved the efficiency of magnet separator.

As shown in fig. 4, the conveying assembly 600 includes a third rotating roller 610 and a fourth rotating roller 620 horizontally disposed, the third rotating roller 610 and the fourth rotating roller 620 are respectively rotatably connected to two side walls of the machine body 100 in the width direction, the third rotating roller 610 is located at a connection position between the side wall of the machine body 100 close to the sorting assembly 400 and one end of the machine body 100 close to the ground, the fourth rotating roller 620 is located below the middle position of the recovery assembly 500, and a second belt 630 is sleeved between the third rotating roller 610 and the fourth rotating roller 620 in a transmission manner. A third motor 640 (see fig. 1) is fixedly connected to a sidewall of the machine body 100, and the third motor 640 drives the third rotating roller 610 to rotate. The mineral aggregate sorted by the sorting assembly 400 falls onto the second belt 630, and the third rotating roller 610 and the fourth rotating roller 620 rotate to drive the belt to move, so that the mineral aggregate is driven to move towards the tailing discharging assembly 800.

As shown in fig. 4, the concentrate discharging assembly 700 includes a collecting tank 710, the collecting tank 710 has a trapezoidal cross section, a large end surface of the trapezoid is close to the second rotating roller 520, a small end surface of the trapezoid is close to the ground, one end of the small end surface of the collecting tank 710 close to the ground is fixedly connected to a collecting pipe 720, the collecting pipe 720 is vertically and fixedly connected to the lower end of the machine body 100, and the collecting pipe 720 is communicated with the outside of the machine body 100. The cross-section of the collecting tank 710 is trapezoidal, so that the receiving area of the collecting tank 710 for receiving the iron ore is increased, and the iron ore can accurately fall into the concentrate discharging assembly 700 from one end of the first belt 540 close to the second rotating roller 520.

As shown in fig. 4, the tailing discharging assembly 800 includes an ore blocking plate 810 vertically and fixedly connected to an inner wall of one end of the machine body 100 close to the ground, the ore blocking plate 810 is located on one side of the fourth rotating roller 620 far away from the third rotating roller 610, one end of the machine body 100 close to the ground is provided with an ore outlet 820, and the ore outlet 820 is located in a middle position of the fourth rotating roller 620 and the ore blocking plate 810 in the horizontal direction. The mineral material screened by the recovery assembly 500 is transported by the conveyor assembly 600 to exit the magnetic separator entirely through the ore exit 820.

The implementation principle of the embodiment is as follows: mineral materials to be screened enter the machine body 100 of the magnetic separator through the feeding device, the mineral materials automatically fall under the action of gravity, the guide plate 900 guides the automatically falling mineral materials to the rotary drum 410 of the separation assembly 400, the third magnetic system 420 adsorbs most of iron ores in the mineral materials onto the rotary drum 410, the iron ores adsorbed onto the rotary drum move towards the recovery assembly 500 through the rotation of the rotary drum 410, the rotary drum 410 and the third magnetic system 420 rotate relatively, and the magnetic force is reduced along with the gradual increase of the distance between the iron ores on the rotary drum 410 and the third magnetic system 420, and the iron ores fall onto the recovery assembly 500 from the rotary drum 410. The recovery assembly 500 transports the iron ore in the direction of the concentrate discharge assembly 700. The mineral aggregate that is not adsorbed by third magnetic system 420 drops to conveying assembly 600 under the action of gravity, and conveying assembly 600 removes the mineral aggregate to tailing ejection of compact subassembly 800 direction, and when the mineral aggregate passed through recovery subassembly 500 below, second magnetic system 550 screened the mineral aggregate once more, adsorbs the iron ore in the mineral aggregate to first belt 540 near the surface on ground, and recovery subassembly 500 carries the iron ore to the direction of ore concentrate ejection of compact subassembly 700. The iron ore falls at the second turning roll 520 into a collection trough 710 and leaves the magnetic separator through a collection pipe 720. The conveyor assembly 600 conveys the unscreened mineral material out of the magnetic separator through the ore outlet 820.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

Claims (9)

1. The utility model provides a well magnetic separator is used in iron ore screening, includes organism (100), organism (100) are the cuboid casing, one end fixedly connected with frame (200) that organism (100) are close to ground, organism (100) are kept away from the position fixedly connected with that ground one end is close to the lateral wall and are given ore device (300), give ore device (300) and organism (100) intercommunication, its characterized in that: the ore feeding device is characterized in that a separation assembly (400) is rotationally connected in the machine body (100), the separation assembly (400) is located below the ore feeding device (300), a recovery assembly (500) is vertically and fixedly connected between two side walls of the machine body (100), the recovery assembly (500) comprises two horizontally arranged rotating rollers, the two rotating rollers are respectively a first rotating roller (510) and a second rotating roller (520), the first rotating roller (510) and the second rotating roller (520) are respectively rotationally connected with the two side walls of the machine body (100), the outer wall of the first rotating roller (510) is coated with a first magnetic system (530), the first rotating roller (510) is located below the separation assembly (400), a first belt (540) is sleeved between the two rotating rollers in a transmission manner, a second magnetic system (550) is arranged in a ring surrounded by the first belt (540), and the second magnetic system (550) is fixedly connected with the two side walls of the machine body (100), the second magnetic system (550) is close to the upper end of the first belt (540), the position close to the ground between the two side walls of the machine body (100) is rotated to connect the conveying assembly (600), the conveying assembly (600) comprises a third rotating roller (610) and a fourth rotating roller (620) which are horizontally arranged, the third rotating roller (610) and the fourth rotating roller (620) are respectively and rotatably connected with the two side walls of the machine body (100) in the width direction, the third rotating roller (610) is positioned at the connecting position of the side wall of the machine body (100) close to the sorting assembly (400) and the end of the machine body (100) close to the ground, the fourth rotating roller (620) is positioned below the middle position of the recovery assembly (500), a second belt (630) is sleeved between the third rotating roller (610) and the fourth rotating roller (620), and the end of the machine body (100) close to the ground is fixedly connected with a concentrate discharging assembly (700), the concentrate discharging assembly (700) is located on one side, far away from the first rotating roller (510), of the second rotating roller (520), the machine body (100) is close to one end of the ground and fixedly connected with a tailing discharging assembly (800), and the tailing discharging assembly (800) is located on one side, far away from the third rotating roller (610), of the fourth rotating roller (620).

2. The medium magnetic separator for screening iron ore according to claim 1, characterized in that: the sorting assembly (400) comprises a rotating drum (410) which is rotatably connected with the machine body (100), a third magnetic system (420) is arranged in the rotating drum (410), the third magnetic system (420) is fixedly connected with two side walls of the machine body (100), and the third magnetic system (420) and the rotating drum (410) rotate relatively.

3. The medium magnetic separator for screening iron ore according to claim 1, characterized in that: the conveying direction of one end of the recovery assembly (500) far away from the ground is the horizontal direction from the first rotating roller (510) to the second rotating roller (520).

4. The medium magnetic separator for screening iron ore according to claim 1, characterized in that: a fourth magnetic system (560) is arranged in a ring surrounded by the first belt (540), the fourth magnetic system (560) is fixedly connected with two side walls of the machine body (100), and the fourth magnetic system (560) is close to the lower end of the first belt (540).

5. The medium magnetic separator for screening iron ore according to claim 1, characterized in that: the ore feeding device (300) comprises an ore feeding pipe (310), the ore feeding pipe (310) is fixedly connected with the machine body (100), the ore discharging pipe (320) is fixedly connected with the ore feeding pipe (310), the longitudinal section of the ore discharging pipe (320) is isosceles trapezoid, and the small end face of the ore discharging pipe (320) is fixedly connected with the ore feeding pipe (310).

6. The medium magnetic separator for screening iron ore according to claim 1, characterized in that: the inner wall of the upper end of the machine body (100) is fixedly connected with a guide plate (900), one end of the guide plate (900) is fixedly connected with the inner wall of the machine body (100), and the other end of the guide plate points to the axis of the rotary drum (410).

7. The medium magnetic separator for screening iron ore according to claim 1, characterized in that: the concentrate discharging assembly (700) comprises a collecting tank (710), the cross section of the collecting tank (710) is trapezoidal, the large trapezoidal end face is close to the second rotating roller, the small trapezoidal end face is close to the ground, one end, close to the ground, of the small end face of the collecting tank (710) is fixedly connected with a collecting pipe (720), the collecting pipe (720) is vertically and fixedly connected with one end, close to the ground, of the machine body (100), and the collecting pipe (720) is communicated with the outside of the machine body (100).

8. The medium magnetic separator for screening iron ore according to claim 1, characterized in that: tailing ejection of compact subassembly (800) include with organism (100) be close to the perpendicular fixed connection's of inner wall of ground one end ore blocking board (810), ore blocking board (810) are located fourth live-rollers (620) and keep away from third live-rollers (610) one side, organism (100) are close to ground one end and have been seted up ore outlet (820), ore outlet (820) are located fourth live-rollers (620) and ore blocking board (810) horizontal direction's intermediate position.

9. The medium magnetic separator for screening iron ore according to claim 1, characterized in that: one end of the frame (200) close to the ground is fixedly connected with a rubber shock pad (210).

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