CN114210545A

CN114210545A - Complicated ore dressing system containing magnetite

Info

Publication number: CN114210545A
Application number: CN202111420247.5A
Authority: CN
Inventors: 芦佳骏; 刘浩
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-11-26
Filing date: 2021-11-26
Publication date: 2022-03-22

Abstract

The invention relates to the technical field of mineral processing equipment, in particular to a complex ore mineral processing system containing magnetite, which comprises a screening box, a feeding frame, a first discharge port, a second discharge port and screening mechanisms, wherein the feeding frame is arranged on the outer surface of the upper end of the screening box, the inner surface of the screening box is communicated with the inner surface of the feeding frame, the number of the screening mechanisms is three, the three screening mechanisms are equidistantly arranged in the screening box, the first discharge port is arranged at the position, corresponding to the screening box, of the outer surface of one side of the screening box, the second discharge port is arranged at the position, close to the bottom end, of the outer surface of one side of the screening box, each screening mechanism comprises a screening plate, a connecting plate, an elastic assembly, a connecting ring, a supporting rod and a spherical block, and one end of the screening plate is hinged with the inner surface of the screening box. The ore sorting device is simple in structure, convenient to operate and low in production cost, and by arranging the screening mechanism, multi-stage sorting screening and collection can be performed according to the size of the ore, so that the fineness in the screening process is improved.

Description

Complicated ore dressing system containing magnetite

Technical Field

The invention relates to the technical field of mineral processing equipment, in particular to a complex ore processing system containing magnetite.

Background

Throughout the magnetite concentration plant in China, from the middle of the 70's of the 20 th century, the nylon fine screen regrinding process is one of the most important means for ensuring the implementation of the fine material policy, and almost all large-scale magnetic separation plants adopt the process without exception, but the process flow structure is different from one plant to another. The fine screening and regrinding process is implemented to generally increase the grade of the iron ore concentrate from 60 to 63 percent to 65 to 67 percent, and some factories and mines reach the international advanced level of more than 68 percent. The appearance of the process promotes the remarkable improvement of the crystal position of magnetite concentrate in China.

Need screen so that follow-up processing or smelting to the ore of different size of volume in the fine screen regrinding technology, but current sieving mechanism structure is complicated, and operation process is comparatively complicated, and can not carry out multistage categorised fine screening simultaneously according to the volume of ore, and the suitability is lower, can produce a large amount of dusts in the ore screening process simultaneously, influences mineral operation operational environment.

Therefore, a complex ore beneficiation system containing magnetite is provided.

Disclosure of Invention

The invention aims to provide a complex ore dressing system containing magnetite, which has the advantages of simple structure, convenience in operation and low production cost, and can perform multi-stage classification screening and collection according to the volume of ores by arranging a screening mechanism, thereby improving the fineness in the screening process and solving the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: the complex ore beneficiation system containing the magnetite comprises a screening box, a feeding frame, a first discharge port, a second discharge port and screening mechanisms, wherein the feeding frame is arranged on the outer surface of the upper end of the screening box, the inner surface of the screening box is communicated with the inner surface of the feeding frame, the screening mechanisms are three in number, the three screening mechanisms are equidistantly arranged in the screening box, the first discharge port is formed in the position, corresponding to the screening box, of the outer surface of one side of the screening box, and the second discharge port is formed in the position, close to the bottom end, of the outer surface of one side of the screening box;

the screening mechanism comprises a screening plate, a connecting ring, a supporting rod and a spherical block, one end of the screening plate is hinged with the inner surface of the screening box, the other end of the screening plate penetrates into the discharge port I and is fixedly connected with the connecting plate, the screening plate inclines towards the discharge port I at 30 degrees, and the outer surface of the connecting plate is tightly attached to the inner surface of the discharge port I;

the outer surface of the upper end of the screening box is respectively provided with two groups of motors close to the front end and the rear end, the motors and the discharge port are positioned on the same side, one end of the output shaft of each motor penetrates into the screening box and is fixedly connected with a rotating rod, the lower end of the rotating rod sequentially penetrates through the screening plates and is not contacted with the rotating rod, the connecting ring is fixedly connected at the joint of the outer surface of the lower end of the screening plates and the rotating rod, the outer surface of the rotating rod is positioned below the connecting ring and is fixedly connected with connecting blocks, the connecting blocks are in one-to-one correspondence with the connecting ring, one side of the outer surface of the upper end of each connecting block is fixedly connected with a supporting rod, one end of the supporting rod, far away from the connecting block, is fixedly connected with a spherical block, a rotating groove is formed in the position of the outer surface of the lower end of the connecting ring, which corresponds to the spherical block, the cross section of the rotating groove is spiral, and the height difference between the tail end of the rotating groove and the starting end is 2CM, and the screening apertures of the three groups of screening plates are sequentially reduced from top to bottom.

By adopting the technical scheme, the screening mechanism can be used for carrying out multistage classified screening and collection according to the volume of ores, the fineness in the screening process is improved, in the screening process, an operator guides the ores into the screening box through the feeding frame and simultaneously turns on the motor, the ores firstly fall into the surface of the uppermost screening plate, meanwhile, the motor output shaft drives the rotating rod and the connecting block on the surface of the rotating rod to rotate, the spherical block rotates along the rotating groove along with the connecting block, because the screening plate inclines towards the direction of the discharging port by 30 degrees, when the spherical block rotates around the spiral rotating groove, the screening plate upwards turns around one end far away from the feeding port, when the spherical block rotates to the tail end of the rotating groove, because the height difference between the tail end and the starting end of the rotating groove is 2CM, one end of the screening plate connected with the connecting plate instantly moves downwards, make the screening board produce the shake to make the part ore that drops on screening board surface along screening board to discharge gate one, the less ore of volume gets into next screening board and screens, and the ore through below screening board gets into the inside of screening case, and operating personnel collects it through the discharge gate two pairs of its, so operate repeatedly, thereby can filter and collect it according to the difference of ore size of volume, and the device simple structure, the operation is convenient, low in production cost.

Preferably, fixedly connected with shaft coupling between dwang and the motor output shaft, and the lower extreme external surface fixedly connected with connecting cylinder of dwang, the internal surface of screening case and the position fixedly connected with gag lever post that the connecting cylinder corresponds, and the gag lever post runs through to the inside of connecting cylinder, the transversal T type of personally submitting of gag lever post, and the upper end external surface fixedly connected with spring of gag lever post.

Through adopting above-mentioned technical scheme, can prevent that dwang and motor output shaft from bearing too big load, play overload protection's effect, carry out displacement compensation to both simultaneously, and the stability and the antidetonation effect of effectual increase dwang, receive ore striking or external when rocking the influence when the dwang, the dwang has the trend that reciprocates, when the dwang has the trend of lapse, the dwang promotes the connecting cylinder and extrudes the spring downwards along the gag lever post, consequently, utilize the high elasticity of spring can effectively slow down the trend that reciprocates of dwang, make it reset and tend to be stable, thereby improve the life of dwang.

Preferably, a cavity is formed in the connecting ring, a plurality of groups of impact blocks are arranged in the cavity, and the cross section of each impact block is triangular.

Through adopting above-mentioned technical scheme, in the screening process, when spherical piece rotates to the end that rotates the groove because the end that rotates the groove is 2CM with the difference in height of initiating terminal, the screening board is connected with the one end of connecting plate and moves down in the twinkling of an eye, spherical piece and go-between produce the striking, make the screening board produce the shake, thereby improve the homogeneity that screening board surface ore distributes, simultaneously through setting up a plurality of groups striking piece in the cavity of go-between inside, spherical piece and go-between produce when striking, the striking piece rocks and collides mutually in the inside of cavity, thereby improve the vibration dynamics on screening board surface, improve the screening effect, personally submit the triangle-shaped through the transversal that sets up striking piece, can guarantee the collision dynamics between the striking piece.

Preferably, the lower extreme surface fixed connection of connecting plate has the fly leaf, and the lower extreme of fly leaf runs through to the inside of screening case, the movable chamber has been seted up with the junction of fly leaf in the inside of screening case, and the inside in activity chamber is provided with the water storage bag, the one end of water storage bag is connected with the internal surface fixed in activity chamber, the T type is personally submitted to the transversal of fly leaf.

Through adopting above-mentioned technical scheme, in the screening process, the screening plate overturns about its articulated one end with the screening case, simultaneously through setting up the water storage bag in the inside in activity chamber, increase the frequency of vibration of connecting plate and screening plate, thereby guaranteeing the screening effect, when the connecting plate is along with the screening plate whereabouts, the connecting plate promotes the fly leaf and moves down and extrude the water storage bag, and the fly leaf upwards rebounds under water storage bag spring action, thereby when moving down the striking that the in-process produced to the connecting plate and cushion, the frequency of vibration of connecting plate and screening plate has been increased, thereby improve the ore and at screening plate surface evenly distributed and get into the probability of next screening plate.

Preferably, the inside storage of water storage bag has the water, the inlet opening has been seted up to one side of water storage bag, and the inlet opening communicates with each other with external water supply equipment, the internal surface of screening case is provided with a plurality of groups shower nozzles with the position that the activity chamber corresponds, one side of shower nozzle is provided with the connecting pipe, and the one end that the shower nozzle was kept away from to the connecting pipe runs through to the inside in activity chamber and communicates with each other with the water storage bag.

By adopting the technical scheme, the water storage bag is arranged in the movable cavity, the vibration frequency of the connecting plate and the screening plate is increased, so that the screening effect is ensured, but in the actual screening process, a certain amount of dust is attached to the surface of the ore, particularly, the ore which is screened after being crushed is attached to a large amount of scraps and dust generated in the crushing process, so that when the ore falls and is influenced by the shaking of the screening plate to move on the surface of the screening plate, the dust on the surface of the ore can be diffused in the screening box and is attached to the surface of a device component or is diffused outwards through the first discharge port and the second discharge port, the normal operation of the device is easily influenced, the air can be polluted, the environmental protection performance of the device is reduced, and therefore, by arranging the spray head which is communicated with the water storage bag through the connecting pipe, in the process that the movable plate moves up and down along with the connecting plate, the fly leaf extrudees the water storage bag repeatedly to make the inside water of water storage bag spout the inside to the screening case through the shower nozzle, thereby effectively fall the dust to screening incasement portion, reduce the probability of ore surface dust diffusion everywhere, improve the feature of environmental protection of device.

Compared with the prior art, the invention has the beneficial effects that:

the device utilizes the screening mechanism, can carry out multi-stage classification screening and collection according to the volume of ores, improves the fineness in the screening process, and has simple structure, convenient operation and low production cost; during the screening process, an operator guides ores into the screening box through the feeding frame and simultaneously turns on the motor, the ores firstly fall into the surface of the uppermost screening plate, meanwhile, the motor output shaft drives the rotating rod and the connecting block on the surface of the rotating rod to rotate, the spherical block rotates along the rotating groove forward direction along with the connecting block, the screening plate inclines towards the direction of the discharge port by 30 degrees, so that when the spherical block rotates around the spiral rotating groove, the screening plate is upwards overturned around one end far away from the feeding port, when the spherical block rotates to the tail end of the rotating groove, because the height difference between the tail end and the starting end of the rotating groove is 2CM, one end of the screening plate connected with the connecting plate instantly moves downwards, the screening plate is shaken, so that part of the ores falling on the surface of the screening plate move towards the discharge port along the screening plate, and ores with smaller volume enter the next screening plate to be screened, the ore through the below screening board gets into the inside of screening case, and operating personnel collects it through the discharge gate two pairs of it, so operates repeatedly to can filter and collect it according to the difference of ore size of volume.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view of A of FIG. 1 in accordance with the present invention;

FIG. 3 is an enlarged view of B of FIG. 1 in accordance with the present invention;

FIG. 4 is a structural view of the connection ring and the connection block of the present invention;

fig. 5 is a combination view of the coupling ring and the rotation groove of the present invention.

In the figure: 1. a screening box; 11. a motor; 12. rotating the rod; 13. a connecting cylinder; 14. a limiting rod; 15. a spring; 2. a feeding frame; 3. a first discharge hole; 4. a screening mechanism; 41. screening the plate; 42. a connecting plate; 421. a movable plate; 422. a movable cavity; 423. a water storage bag; 424. a water inlet hole; 425. a spray head; 426. a connecting pipe; 43. a connecting ring; 431. a cavity; 432. an impact block; 44. a support bar; 45. a spherical block; 46. connecting blocks; 47. a rotating groove; 48. a coupling; 5. and a second discharge hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 5, the present invention provides a technical solution:

a complex ore beneficiation system containing magnetite, as shown in figures 1 and 4, comprises a screening box 1, a feeding frame 2, a first discharge port 3, a second discharge port 5 and screening mechanisms 4, wherein the feeding frame 2 is arranged on the outer surface of the upper end of the screening box 1, the inner surface of the screening box 1 is communicated with the inner surface of the feeding frame 2, the screening mechanisms 4 are three groups, the three groups of screening mechanisms 4 are equidistantly arranged in the screening box 1, the first discharge port 3 is arranged at the position, corresponding to the screening box 1, of the outer surface of one side of the screening box 1, and the second discharge port 5 is arranged at the position, close to the bottom end, of the outer surface of one side of the screening box 1;

the screening mechanism 4 comprises a screening plate 41, a connecting plate 42, a connecting ring 43, a supporting rod 44 and a spherical block 45, one end of the screening plate 41 is hinged to the inner surface of the screening box 1, the other end of the screening plate penetrates into the discharge port I3 and is fixedly connected with the connecting plate 42, the screening plate 41 inclines towards the discharge port I3 at an angle of 30 degrees, and the outer surface of the connecting plate 42 is tightly attached to the inner surface of the discharge port I3;

the outer surface of the upper end of the screening box 1 is respectively provided with two groups of motors 11 near the front end and the rear end, the motors 11 and the discharge port I3 are positioned on the same side, one end of an output shaft of each motor 11 penetrates into the screening box 1 and is fixedly connected with a rotating rod 12, the lower end of the rotating rod 12 sequentially penetrates through the screening plate 41, the screening plate 41 is not contacted with the rotating rod 12, the connecting ring 43 is fixedly connected at the joint of the outer surface of the lower end of the screening plate 41 and the rotating rod 12, the outer surface of the rotating rod 12 is positioned below the connecting ring 43 and is fixedly connected with connecting blocks 46, the connecting blocks 46 are in one-to-one correspondence with the connecting rings 43, one side of the outer surface of the upper end of each connecting block 46 is fixedly connected with a supporting rod 44, one end of each supporting rod 44, which is far away from the corresponding connecting block 46, and the outer surface of the lower end of each connecting ring 43 is provided with a rotating groove 47 corresponding to the corresponding spherical block 45, and the cross section of the rotating groove 47 is spiral, the height difference between the tail end and the starting end of the rotating groove 47 is 2CM, and the screening apertures of the screening plates 41 are sequentially reduced from top to bottom.

By utilizing the screening mechanism 4, the ore can be classified, screened and collected in multiple stages according to the size of the ore, the fineness in the screening process is improved, in the screening process, an operator guides the ore into the screening box 1 through the feeding frame 2 and simultaneously turns on the motor 11, the ore firstly falls into the surface of the uppermost screening plate 41, meanwhile, the output shaft of the motor 11 drives the rotating rod 12 and the connecting block 46 on the surface of the rotating rod 12 to rotate, the spherical block 45 rotates along the rotating groove 47 along with the connecting block 46 in the forward direction, because the screening plate 41 inclines towards the first discharging port 3 at 30 degrees, when the spherical block 45 rotates around the spiral rotating groove 47, the screening plate 41 upwards overturns around the end far away from the first feeding port, when the spherical block 45 rotates to the tail end of the rotating groove 47, because the height difference between the tail end of the rotating groove 47 and the starting end is 2CM, the end of the screening plate 41 connected with the connecting plate 42 instantly downwards moves, make screening plate 41 produce the shake, thereby the messenger drops at the partial ore on screening plate 41 surface along screening plate 41 to discharge gate one 3, the less ore of volume gets into next screening plate 41 and screens, the ore through below screening plate 41 gets into the inside of screening case 1, operating personnel collects it through discharge gate two 5, so operate repeatedly, thereby can filter and collect it according to the difference of ore volume size, and the device simple structure, the operation is convenient, low in production cost.

As an embodiment of the present invention, as shown in fig. 1 and 2, a coupling 48 is fixedly connected between the rotating rod 12 and the output shaft of the motor 11, a connecting cylinder 13 is fixedly connected to the outer surface of the lower end of the rotating rod 12, a position corresponding to the connecting cylinder 13 on the inner surface of the screening box 1 is fixedly connected with a limiting rod 14, the limiting rod 14 penetrates into the connecting cylinder 13, the cross section of the limiting rod 14 is T-shaped, and a spring 15 is fixedly connected to the outer surface of the upper end of the limiting rod 14.

Through setting up spring 15 and shaft coupling 48, can prevent that

dwang

12 and 11 output shafts of motor from bearing too big load, play overload protection's effect, carry out displacement compensation to both simultaneously, and effectual stability and the antidetonation effect that increases dwang 12, receive ore striking or when the external world rocks the influence when dwang 12, dwang 12 has the trend of reciprocating, when dwang 12 has the trend of lapse, dwang 12 promotes connecting cylinder 13 and pushes down spring 15 along gag lever post 14, consequently, utilize spring 15's high elasticity can effectively slow down the trend of reciprocating of dwang 12, make it reset and tend stably, thereby improve dwang 12's life.

As an embodiment of the present invention, as shown in fig. 4 and 5, a cavity 431 is formed in the connecting ring 43, and a plurality of groups of striking blocks 432 are disposed in the cavity 431, and the cross section of each striking block 432 is triangular.

In the screening process, when the spherical block 45 rotates to the tail end of the rotating groove 47, the height difference between the tail end and the starting end of the rotating groove 47 is 2CM, one end of the screening plate 41 connected with the connecting plate 42 moves downwards instantly, the spherical block 45 collides with the connecting ring 43, the screening plate 41 shakes, the ore distribution uniformity on the surface of the screening plate 41 is improved, meanwhile, a plurality of groups of striking blocks 432 are arranged in the cavity 431 inside the connecting ring 43, when the spherical block 45 collides with the connecting ring 43, the striking blocks 432 shake and collide with each other inside the cavity 431, the vibration force on the surface of the screening plate 41 is improved, the screening effect is improved, the cross section of the striking block 432 is triangular, and the collision force between the striking blocks 432 can be ensured.

As an embodiment of the present invention, as shown in fig. 3, a movable plate 421 is fixedly connected to an outer surface of a lower end of the connecting plate 42, the lower end of the movable plate 421 penetrates into the screening box 1, a movable cavity 422 is formed at a connection position between the inside of the screening box 1 and the movable plate 421, a water storage bag 423 is disposed in the movable cavity 422, one end of the water storage bag 423 is fixedly connected to an inner surface of the movable cavity 422, and a cross section of the movable plate 421 is T-shaped.

In the screening process, the screening plate 41 is turned over up and down around the hinged end of the screening plate 41 and the screening box 1, meanwhile, the water storage bag 423 is arranged in the movable cavity 422, the vibration frequency of the connecting plate 42 and the screening plate 41 is increased, the screening effect is guaranteed, when the connecting plate 42 falls along with the screening plate 41, the connecting plate 42 pushes the movable plate 421 to move downwards and extrude the water storage bag 423, and the movable plate 421 rebounds upwards under the elastic action of the water storage bag 423, so that the vibration frequency of the connecting plate 42 and the screening plate 41 is increased while the impact generated in the downward moving process of the connecting plate 42 is buffered, and the probability that the ore is uniformly distributed on the surface of the screening plate 41 and enters the next screening plate 41 is improved.

As an embodiment of the present invention, as shown in fig. 3, a water body is stored in the water storage bag 423, a water inlet 424 is formed in one side of the water storage bag 423, the water inlet 424 is communicated with an external water supply device, a plurality of groups of spray heads 425 are disposed at positions of the inner surface of the screening box 1 corresponding to the movable chamber 422, a connection pipe 426 is disposed at one side of the spray heads 425, and one end of the connection pipe 426, which is far away from the spray heads 425, penetrates into the movable chamber 422 and is communicated with the water storage bag 423.

By adopting the above technical scheme, the water storage bag 423 is arranged in the movable cavity 422, and the vibration frequency of the connecting plate 42 and the screening plate 41 is increased, so that the screening effect is ensured, but in the actual screening process, a certain amount of dust is attached to the surface of the ore, especially, when the ore is screened after being crushed, a large amount of scraps and dust generated in the crushing process are attached to the surface of the ore, so that when the ore falls down and moves on the surface of the screening plate 41 under the influence of the shaking of the screening plate 41, the dust on the surface of the ore is diffused in the screening box 1 and is attached to the surface of the device component or is diffused outwards through the first discharge port 3 and the second discharge port 5, the normal operation of the device is easily affected, air pollution is caused, the environmental protection performance of the device is reduced, and therefore, by arranging the spray head 425 communicated with the water storage bag 423 through the connecting pipe 426, the in-process that fly leaf 421 reciprocated along with connecting plate 42, fly leaf 421 repeatedly extrudees water storage bag 423 to make the inside water of water storage bag 423 spout the inside to screening case 1 through shower nozzle 425, thereby effectively fall the dust to screening case 1 inside, reduce the probability of ore surface dust diffusion everywhere, improve the feature of environmental protection of device.

The working principle is as follows: by utilizing the screening mechanism 4, the ore can be classified, screened and collected in multiple stages according to the size of the ore, the fineness in the screening process is improved, in the screening process, an operator guides the ore into the screening box 1 through the feeding frame 2 and simultaneously turns on the motor 11, the ore firstly falls into the surface of the uppermost screening plate 41, meanwhile, the output shaft of the motor 11 drives the rotating rod 12 and the connecting block 46 on the surface of the rotating rod 12 to rotate, the spherical block 45 rotates along the rotating groove 47 along with the connecting block 46 in the forward direction, because the screening plate 41 inclines towards the first discharging port 3 at 30 degrees, when the spherical block 45 rotates around the spiral rotating groove 47, the screening plate 41 upwards overturns around the end far away from the first feeding port, when the spherical block 45 rotates to the tail end of the rotating groove 47, because the height difference between the tail end of the rotating groove 47 and the starting end is 2CM, the end of the screening plate 41 connected with the connecting plate 42 instantly downwards moves, make screening plate 41 produce the shake, thereby the messenger drops at the partial ore on screening plate 41 surface along screening plate 41 to discharge gate one 3, the less ore of volume gets into next screening plate 41 and screens, the ore through below screening plate 41 gets into the inside of screening case 1, operating personnel collects it through discharge gate two 5, so operate repeatedly, thereby can filter and collect it according to the difference of ore volume size, and the device simple structure, the operation is convenient, low in production cost.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a contain complicated ore dressing system of magnetite, includes screening case (1), feeding frame (2), discharge gate (3), discharge gate two (5) and screening mechanism (4), its characterized in that: the feeding frame (2) is arranged on the outer surface of the upper end of the screening box (1), the inner surface of the screening box (1) is communicated with the inner surface of the feeding frame (2), the number of the screening mechanisms (4) is three, the three screening mechanisms (4) are equidistantly arranged in the screening box (1), a first discharge port (3) is formed in the position, corresponding to the screening box (1), of the outer surface of one side of the screening box (1), and a second discharge port (5) is formed in the position, close to the bottom end, of the outer surface of one side of the screening box (1);

the screening mechanism (4) comprises a screening plate (41), a connecting plate (42), a connecting ring (43), a supporting rod (44) and a spherical block (45), one end of the screening plate (41) is hinged to the inner surface of the screening box (1), the other end of the screening plate penetrates into the discharge port I (3) and is fixedly connected with the connecting plate (42), the screening plate (41) inclines towards the discharge port I (3) at 30 degrees, and the outer surface of the connecting plate (42) is tightly attached to the inner surface of the discharge port I (3);

the screening box is characterized in that two groups of motors (11) are respectively arranged on the outer surface of the upper end of the screening box (1) close to the front end and the rear end, the motors (11) and the discharge port I (3) are located on the same side, one end of an output shaft of each motor (11) penetrates into the screening box (1) and is fixedly connected with a rotating rod (12), the lower end of each rotating rod (12) sequentially penetrates through a screening plate (41), the screening plates (41) are not in contact with the rotating rods (12), the connecting rings (43) are fixedly connected to the connecting positions of the outer surfaces of the lower ends of the screening plates (41) and the rotating rods (12), the outer surfaces of the rotating rods (12) are located below the connecting rings (43) and are fixedly connected with connecting blocks (46), the connecting blocks (46) correspond to the connecting rings (43) one to one, supporting rods (44) are fixedly connected to one side of the outer surface of the upper end of the connecting blocks (46), and spherical blocks (45) are fixedly connected to one end, far away from the supporting rods (44), the position that the lower extreme surface of go-between (43) corresponds with spherical piece (45) has been seted up and has been rotated groove (47), and rotates the transversal heliciform that personally submits of groove (47), the end of rotating groove (47) is 2CM with the difference in height of initiating terminal, three groups the screening aperture of screening board (41) reduces from last to lower in proper order.

2. The complex ore beneficiation system containing magnetite according to claim 1, wherein: fixedly connected with shaft coupling (48) between dwang (12) and motor (11) output shaft, the lower extreme surface fixedly connected with connecting cylinder (13) of dwang (12), the internal surface of screening case (1) and position fixedly connected with gag lever post (14) that connecting cylinder (13) correspond, and gag lever post (14) run through to the inside of connecting cylinder (13), the transversal T type of personally submitting of gag lever post (14), and the upper end surface fixedly connected with spring (15) of gag lever post (14).

3. The complex ore beneficiation system containing magnetite according to claim 1, wherein: the cavity (431) is formed in the connecting ring (43), the plurality of groups of impact blocks (432) are arranged in the cavity (431), and the cross sections of the impact blocks (432) are triangular.

4. The complex ore beneficiation system containing magnetite according to claim 1, wherein: the lower extreme external surface fixed connection of connecting plate (42) has fly leaf (421), and the lower extreme of fly leaf (421) runs through to the inside of screening case (1), movable chamber (422) have been seted up with the junction of fly leaf (421) in the inside of screening case (1), and the inside in movable chamber (422) is provided with water storage bag (423), the one end of water storage bag (423) is connected with the internal surface fixed in movable chamber (422), the transversal T type of personally submitting of fly leaf (421).

5. The complex ore beneficiation system containing magnetite according to claim 4, wherein: the inside storage of water storage bag (423) has the water, inlet opening (424) have been seted up to one side of water storage bag (423), and inlet opening (424) communicate with each other with external water supply equipment, the internal surface of screening case (1) is provided with a plurality of shower nozzles (425) with the position that activity chamber (422) correspond, one side of shower nozzle (425) is provided with connecting pipe (426), and connecting pipe (426) keep away from the one end of shower nozzle (425) and run through to the inside and the water storage bag (423) of activity chamber (422) and communicate with each other.