CN214515254U

CN214515254U - Magnetic separation device and movable magnetic separator comprising same

Info

Publication number: CN214515254U
Application number: CN202023045834.4U
Authority: CN
Inventors: 杭超; 李平妮; 杭淑娟
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-12-16
Filing date: 2020-12-16
Publication date: 2021-10-29
Anticipated expiration: 2030-12-16

Abstract

The utility model discloses a magnetic separation device and portable magnet separator that constitutes thereof, its characterized in that: including magnet fixed frame plate, pivot, feed tank, collecting box and collection belt, magnet fixed frame plate is the platelike body, and is vertical setting, and the top at magnet fixed frame plate is established to the feed tank, and the collecting box setting is in the below of magnet fixed frame plate, and at least one side of magnet fixed frame plate is equipped with the magnet, and does not set up the magnet on the magnet fixed frame plate of collecting box top, the pivot sets up the both ends at magnet fixed frame plate, and the collection belt can set up between the pivot, and the pivot rotates, can drive and collect the belt and rotate on magnet fixed frame plate, be equipped with the baffle on the collection belt, the bottom of feed tank is equipped with the gap, the baffle side at the collection belt is established to the gap, and the material in the feed tank spills the back can be in collection belt baffle side whereabouts from the gap promptly.

Description

Magnetic separation device and movable magnetic separator comprising same

Technical Field

The utility model belongs to the mineral processing equipment field, concretely relates to magnetic separation device and portable magnet separator that constitutes thereof.

Background

The magnetic separator has important functions in the fields of ore dressing, garbage classification and the like.

The steel-making industry in China is developed, the demand of iron ore is huge, but the traditional iron ore resource is insufficient; in 2019, the consumption of iron ore is 18.99 hundred million tons, the yield is 8.4 hundred million tons, the import amount is 10.69 hundred million tons, and the import amount is 1014.6 hundred million dollars; the traditional iron ore resources in China are insufficient and cannot meet the existing requirements, and the development of the non-traditional iron ore resources is one direction for promoting the internal circulation of the economy.

The desert area in China is large, and the sand resources are rich; the content of the concentrate iron ore powder in the sand of the desert is 0.282 percent, so the iron ore powder is screened from the sand of the desert, and the defects of the traditional iron ore can be made up to a certain degree.

Chinese patents CN201223825, CN208098369U, CN204294356U, CN211495597U, CN207119462U, CN102614985A, CN206567088U, CN103977887A, CN201644398U, and CN201052476 disclose apparatuses for screening iron ore from sand. However, the method has the problems of low efficiency and low economy.

The applicant also provides a magnetic separation device for economically and effectively separating iron ores in sand and a mobile magnetic separator formed by the same.

Disclosure of Invention

The utility model aims to solve the technical problem that the ore dressing of current equipment from the desert sand is inefficient, uneconomic problem.

Therefore, the utility model provides an economical and efficient magnetic separation device and a movable magnetic separator comprising the same.

In order to achieve the above object, the present invention provides the following technical solutions:

the magnetic separation device is characterized in that: including magnet fixed frame plate (4), pivot (2), feed tank (6), collecting box (1) and collection belt (3), magnet fixed frame plate (4) are the platelike body, and are vertical setting, and the top at magnet fixed frame plate (4) and collection belt (3) is established in feed tank (6), and collecting box (1) sets up in the below of magnet fixed frame plate (4) and collection belt (3).

The bottom of the feed box (6) is provided with a gap (9), the materials in the feed box (6) can be discharged from the gap (9) and fall freely to form material flow,

at least one side surface of the magnet fixing frame plate (4) is provided with a magnet (7), the magnet fixing frame plate (4) above the collecting box (1) is not provided with the magnet (7),

the collecting belt (3) is vertically arranged, a baffle (8) is arranged on the surface of the collecting belt, the magnet (7) and the gap (9) are respectively arranged on two sides of the collecting belt (3), the gap (9) is arranged on one side with the baffle (8), and material flow can fall from one side, provided with the baffle (8), of the collecting belt (3).

Namely, when the baffle (8) is positioned at the outer side of the collecting belt (3), the magnet fixing frame plate (4) is arranged at the inner side of the collecting belt (3), and the gap (9) is arranged at the outer side of the collecting belt (3); when the baffle (8) is positioned at the inner side of the collecting belt (3), the magnet fixing frame plate (4) is arranged at the outer side of the collecting belt (3), and the gap (9) is arranged at the inner side of the belt.

As an improvement, the bottom of the feeding box (6) is funnel-shaped, and the gap (9) is arranged at the lowest part of the funnel shape.

As an improvement, a driving mechanism (5) is arranged, the driving mechanism (5) can drive the rotating shaft (2) to rotate, and the driving mechanism (5) is one of an electric motor, a diesel engine, a gasoline engine or a hydraulic motor.

As an improvement, magnets (7) are arranged on two sides of the magnet fixing frame plate (4); alternatively, the magnet (7) penetrates the magnet fixing frame plate (4).

As the improvement, the below of feed tank (6) is equipped with sand blocking plate (10), sand blocking plate (10) set up and collect between belt (3) in gap (9), and be the slope form setting or vertical form setting, and sand blocking plate (10) can block the unloading entering of feed tank (6) and collect the region between belt (3) and the fixed frame plate of magnet (4), get into promptly and collect and form the intermediate layer between belt (3) and the fixed frame plate of magnet (4), and sand blocking plate (10) can block interbedded upper portion opening, prevent that the object of top whereabouts from getting into in this intermediate layer.

When the sand blocking plate (10) is obliquely arranged: the upper end of the sand baffle inclines towards the direction of the magnet fixing frame plate (4), and the lower end inclines towards the outer side of the collecting belt.

When the sand blocking plate (10) is vertically arranged: the lower end of the sand baffle (10) is lower than the uppermost end of the collecting belt (3).

As a modification, a discharge belt (12) is also provided, and the discharge belt (12) is arranged below the magnet (7).

As an improvement, a gauze (13) is arranged at the upper part of the feed box (6).

The movable magnetic separator is characterized by comprising a travelling mechanism (11), wherein a magnetic separation device is arranged on the travelling mechanism, the magnetic separation device comprises a magnet fixing frame plate (4), a rotating shaft (2), a feeding box (6), a collecting box (1) and a collecting belt (3), the magnet fixing frame plate (4) is a plate-shaped body and is vertically arranged, the feeding box (6) is arranged above the magnet fixing frame plate (4) for collecting the belt (3), the collecting box (1) is arranged below the magnet fixing frame plate (4) for collecting the belt (3), the magnet (7) is at least arranged on one side face of the magnet fixing frame plate (4), the magnet (7) is not arranged on the magnet fixing frame plate (4) above the collecting box (1), the rotating shaft (2) is arranged at two ends of the magnet fixing frame plate (4), the collecting belt (3) can be arranged between the rotating shaft (2), and pivot (2) rotate, can drive and collect belt (3) and rotate, be equipped with baffle (8) on collecting belt (3), the bottom of feed box (6) is equipped with gap (9), establish respectively in the both sides of baffle (8) gap (9) and magnet fixed frame board (4), material in feed box (6) leaks the back can be in collecting belt (3) baffle side whereabouts from gap (9) promptly.

The bottom of the feeding box (6) is funnel-shaped, and the gap (9) is arranged at the lowest funnel-shaped part.

The device is provided with a driving mechanism (5), the driving mechanism (5) can drive the rotating shaft (2) to rotate, and the driving mechanism (5) is one of an electric motor, a diesel engine, a gasoline engine or a hydraulic motor.

Magnets (7) are arranged on both sides of the magnet fixing frame plate (4); alternatively, the magnet (7) penetrates the magnet fixing frame plate (4).

The below of feed tank (6) is equipped with sand blocking plate (10), sand blocking plate (10) set up between gap (9) and collection belt (3), and be the setting of slope form or vertical form, and sand blocking plate (10) can block the unloading entering of feed tank (6) and collect the region between belt (3) and the fixed frame plate of magnet (4).

When the sand blocking plate (10) is obliquely arranged: the upper end of the sand baffle inclines towards the direction of the magnet fixing frame plate (4), and the lower end inclines towards the outer side of the collecting belt;

As a modification, a discharge belt (12) is provided, and the discharge belt (12) is arranged below the magnet (7).

The upper part of the feeding box (6) is provided with a gauze (13).

As an improvement, a material taking mechanism is arranged, and the material taking mechanism is a conveying belt and/or a bucket.

As the improvement, a plurality of groups of magnetic separation devices are arranged, and the magnetic separation devices are arranged in a stacked mode, namely, are arranged on different horizontal planes.

In actual use: the materials to be selected are placed into the feeding box (6), the materials can leak from a gap (9) at the lower part of the feeding box (6) due to sand particles, and iron ores in the materials or objects capable of being adsorbed by magnetic bodies can be adsorbed on the surface of the collecting belt (3) under the action of magnetic adsorption because the materials are arranged on the baffle side of the belt and the other side of the belt is provided with a magnet (7) in the falling process, so that the unadsorbed materials fall downwards and are removed; along with the rotation of the belt, when the materials rotate to the part without the magnet (7), the collected materials fall into the collection box (1) under the influence of gravity.

The beneficial effects of the utility model reside in that:

the magnetic separation efficiency is improved: the material of the utility model falls freely, and after the magnetic particles are absorbed on the collecting belt (3), the magnetic particles are not impacted and wrapped by the material flow; and traditional device carries out the transportation of material and magnetic separation result with same belt, and the material can wrap up in and carry the magnetic separation result and reduce magnetic separation efficiency.

The utilization efficiency of the magnetic field of the magnet is high: the traditional magnetic separator uses a collecting belt to convey raw materials, and uses the magnetic field of a magnet in a roller to carry out magnetic separation, such as CN 201223825; some magnetic separators place the magnet inside the non-roller section of the collecting belt, the magnet is close to one section of the non-roller section of the collecting belt and far away from the other section, and magnetic separation operation is carried out, such as CN 208098369U; the structure of the magnetic separator can only use one surface of the magnet to carry out magnetic separation operation, and the utilization rate of the magnetic field of the magnet is low; meanwhile, as the collecting belt is used for conveying materials, the materials which can be adsorbed can be taken away from the belt by the materials which are not adsorbed, and the adsorption can not be finished or the adsorption rate can not be reduced.

Because the collecting belts (3) are vertically arranged, the magnets (7) are arranged on the inner sides of the collecting belts (3), the two sides of each magnet are respectively close to the inner sides of the non-rotating shaft sections of the two collecting belts (3) (or the magnets (7) are arranged on the outer sides of the collecting belts (3), the collecting belts (3) are respectively distributed on the two sides of each magnet (7), when n magnets (7) exist, the two-side magnetic force of each magnet (7) can be exerted by n +1 collecting belts (3), the magnetic fields on the two sides of each magnet (7) can participate in magnetic separation operation, and the utilization efficiency of the magnetic fields of the magnets is improved by nearly one time compared with the traditional arrangement mode.

The amount of the collecting belt (3) is reduced; the magnetic field is supplied with through the whereabouts to the material among the magnetic separation device and magnetic separation is carried out, need not collect belt (3) and transports, and only product need collect belt (3) transportation to the material of getting rid of can directly discharge, and need not to use the conveyer belt again to carry the non-magnetic material and discharge.

The utilization efficiency of the collecting belt (3) is high; because the vertical range of belt (3) is collected to the magnetic separation device, and the direction of motion of collecting belt (3) non-rotation axle section is perpendicular with the direction of motion of raw materials, and magnet (7) are in collect belt (3) non-magnet (7) side and all formed magnetic field, so work as when all there is the material to pass through in the magnetic field of collecting belt (3) non-magnet side, magnetic particle wherein is attracted corresponding magnetic adsorption region respectively (collect on belt (3) non-magnet side surface), consequently collect two non-rotation axle sections of belt (3) and can transport corresponding magnetic separation product respectively, improve nearly one time to the utilization ratio of collecting belt (3).

The design flexibility of the magnetic separation system is improved. The raw material supply is more independent, so that the design of a system for the raw material with larger iron content variation range is easier; since the material flow is not in contact with the belt surface of the collecting belt (3), the velocity (the feeding amount of the material per unit time) of the material flow is not limited by the transmission velocity of the collecting belt (3), so that the velocity of the material flow can be independently increased within a certain range; so that the raw material with lower iron content can be separated by magnetic separation more economically.

The density is high; because the magnets (7), the magnet fixing frame plate (4), the collecting belt (3) and the material flow are all in a narrow strip shape, a repeatable unit is formed, the dense arrangement is convenient, the flux of the raw materials per unit area per unit time is improved, and the magnetic separation products per unit time are also improved.

The energy consumption is low; since the collecting belt (3) in the magnetic separation device is only used for carrying the product, the transmission rate of the collecting belt (3) can be determined according to the product rate. Because the collection belt (3) is not directly contacted with the sand flow, the separation of the product and the raw material can be realized only by overcoming the attraction of the magnetic field to the product and the friction force between the collection belt (3) and the magnet (7). When the magnetic separation vehicle magnetically separates a high sand dune, the multiple sand processing modules can form the magnetic separation vehicle with the same height as the sand dune, so that sand taking and sand discharging are carried out at the similar height, and the energy consumed for transporting sand by overcoming gravity is reduced.

Drawings

FIG. 1 is a schematic front view of a magnetic separation device.

FIG. 2 is a schematic left-view structural diagram I of the magnetic separation device.

Fig. 3 is a schematic view of another feeding bin structure.

Fig. 4 is a schematic view of a part a of the silo of fig. 1.

FIG. 5 is a schematic front view of a mobile magnetic separator I.

FIG. 6 is a schematic left-side view of a mobile magnetic separator I.

FIG. 7 is a schematic front view of a mobile magnetic separator II.

FIG. 8 is a schematic left-side view of a mobile magnetic separator II.

FIG. 9 is a schematic left-side view of a mobile magnetic separator III.

Fig. 10 is a schematic view of the structure when the material is fed from the outside.

Fig. 11 is a schematic view of the structure when the material is fed from the inside.

FIG. 12 is a schematic left view of the magnetic separator II

Shown in the figure: the device comprises a collecting box 1, a rotating shaft 2, a collecting belt 3, a magnet fixing frame plate 4, a driving mechanism 5, a feeding box 6, a magnet 7, a baffle 8, a gap 9, a sand baffle 10, a traveling mechanism 11, a discharging belt 12 and a gauze 13.

Detailed Description

The preferred embodiments of the present invention will be described in detail below.

Example 1: referring to fig. 1, fig. 2 and fig. 12, for the structural schematic diagram of embodiment 1 of the present invention, this embodiment discloses a magnetic separation device, which is characterized in that: comprises a magnet fixing frame plate 4, a rotating shaft 2, a feeding box 6, a collecting box 1 and a collecting belt 3, wherein the magnet fixing frame plate 4 is a plate-shaped body, and is vertically arranged, the feeding box 6 is arranged above the magnet fixing frame plate 4, the collecting box 1 is arranged below the magnet fixing frame plate 4, at least one side surface of the magnet fixing frame plate 4 is provided with a magnet 7, and the magnet fixing frame plate 4 above the collecting box 1 is not provided with the magnet 7, the rotating shafts 2 are arranged at the two ends of the magnet fixing frame plate 4, the collecting belt 3 can be arranged between the rotating shafts 2, and the rotating shaft 2 rotates to drive the collecting belt 3 to rotate on the magnet fixing frame plate 4, the collecting belt 3 is provided with a baffle plate 8, the bottom of feed box 6 is equipped with gap 9, gap 9 is established in the outside of collecting belt 3, and the material in feed box 6 can fall outside of collecting belt 3 after leaking from gap 9 promptly.

The magnet fixing frame plate 4 is formed by processing a plate, and is provided with square holes and/or round holes for mounting the magnets 7, and the round holes are used for mounting the rotating shaft 2; a driving mechanism is arranged above the rotating shaft 2.

Two groups of rotating shafts 2 are respectively arranged at two end parts of the magnet fixing frame plate 4; the collecting belt 3 is connected between the two rotating shafts 2; the surface of the collecting belt 3 is provided with a baffle 8, and the baffle 8 is in a sheet strip shape and is vertically arranged on the surface of the collecting belt 3.

When a plurality of magnet holder plates 4 are provided, the plurality of magnet holder plates 4 may share one feed tank 6 and one collection tank 1.

As the improvement scheme, the pivot one at 4 both ends of magnet fixed frame plate is initiative pivot, and one is passive pivot, the square hole on the magnet fixed frame plate 4 is partial to passive pivot 2 and arranges, and is equipped with magnet 7 with the same horizontal position in square hole on the passive pivot 2, and the magnetic separation result can not drop when passive pivot 2, concentrates on the 2 ventral sides of initiative pivot and falls.

As an improvement, the magnet 7 arranged on the driven rotating shaft is in a circular ring shape with the diameter equal to that of the rotating shaft.

As a modification, a driving mechanism 5 is provided, the driving mechanism 5 can drive the rotating shaft 2 to rotate, and the driving mechanism 5 is one of an electric motor, a diesel engine, a gasoline engine or a hydraulic motor.

As a modification, magnets 7 are provided on both sides of the magnet holder plate 4.

As a modification, a discharge belt 12 is also provided, the discharge belt 12 being disposed below the magnet 7.

Example 2: the present embodiment differs from embodiment 1 in that: the below of feed tank 6 is equipped with sand board 10, sand board 10 sets up and collects between the belt 3 at gap 9, and is the slope form setting or vertical form setting, and sand board 10 can block the unloading entering of feed tank 6 and collect the region between belt 3 and the fixed frame plate 4 of magnet.

The sand baffle 10 can block falling materials from entering the middle of the collecting belt 3 and the magnet fixing frame plate 4, if the falling materials enter the interlayer, iron ores contained in the falling materials can be adsorbed on the surface of the magnet, and the magnet is influenced to adsorb the iron ores on the collecting belt.

Example 3: referring to fig. 3, which is a schematic structural diagram of embodiment 3 of the present invention, compared with embodiment 1, the present embodiment is different in that: the bottom of the feed tank 6 is funnel-shaped, and the gap 9 is arranged at the lowest funnel-shaped part.

Example 4: referring to fig. 4, which is a schematic structural diagram of embodiment 4 of the present invention, compared with embodiment 1, the present embodiment is different in that: a gauze 13 is provided on the upper part of the feed box 6.

During the in-service use, when feeding for feed tank 6, can sieve out big impurity or some branch, the bold material of doping in the sand, prevent to get into and block up gap 9 of lower part behind the feed tank 6.

A gauze is arranged above the feeding box 6, a vibrator and a spring (not shown in the figure, the mechanism belongs to the conventional means) can be arranged on the upper edge of the gauze, the magnet fixing frame plate 4 is fixed below the feeding box 6, and the collecting box 1 is arranged below the rotating shaft 2; the bottom surface of the feeding box 6 is provided with a gap parallel to the non-roller section of the collecting belt 3.

Example 5: referring to fig. 5 to 8, which are schematic structural diagrams of embodiment 5 of the present invention, the present embodiment discloses a mobile magnetic separator, which includes a traveling mechanism 11, the traveling mechanism 11 is provided with a magnetic separation device as described in embodiments 1 to 4, a material taking mechanism is provided in front of the magnetic separation device, and a material discharging device is also provided, and the three components form a processing module; the material taking mechanism is composed of a conveying belt which inclines downwards, the lower end of the conveying belt is in contact with ground sand, the conveying belt rotates to convey the sand to a gauze on the feeding box 6, the gauze is vibrated by a vibrator and a spring, and fine sand falls into the feeding box 6; the discharging device comprises two parts, wherein the front part is horizontally arranged and is positioned below the magnetic separation device, and the rear part is obliquely arranged at the rear upper part.

During the operation of the sand processing module, the material taking mechanism sends sand to the upper part of the material feeding box 6, fine sand passing through the gauze falls into the material feeding box 6, and impurities fall onto the inclined plane at the rear part of the discharging device from the lower end of the gauze; the sand in the feed box 6 vertically falls through the gap to form a sand flow outside the collection belt 3; the magnetic substance is attracted by the magnetic field, the magnetic substance in the magnetic substance is attracted to the surface of the collecting belt 3, the magnetic substance is carried away from the magnetic field by the belt along with the rotation of the collecting belt 3, the magnetic substance cannot slide to the magnet 7 due to the existence of the baffle 8, and when the magnetic substance runs to a part without the magnet 7, the magnetic substance attracted to the surface of the collecting belt 3 falls into the collecting box 1 below to realize collection; the non-magnetic part in the sand flow falls to the horizontal part of the discharging device, the discharging device is a discharging belt, and the discharging belt can be horizontally conveyed to the rear or the side along with the rotation of the discharging device, and also can be lifted and conveyed to a certain height to fall to the rear of the discharging device.

The walking mechanism is arranged on a crawler chassis or a wheel chassis.

Example 6: the difference of the embodiment is that: before a higher sand dune, a plurality of sand treatment modules are longitudinally arranged in a multi-layer manner to form a sand treatment unit; a plurality of husky processing unit horizontal arrangement to fixed a whole that forms through vertical steel column and horizontally girder steel, top and lateral wall are wrapped with panel again, sharing crawler chassis.

As a preferred scheme of the embodiment, the magnetic separation modules on the same layer share one iron sand discharging mechanism to convey iron sand to the side surface of the magnetic separator; the iron sand from different layers is collected together through an inclined pipeline.

During the operation of the magnetic separation vehicle, the caterpillar tracks on the chassis rotate, the vehicle body approaches to a sand dune, the material taking mechanism on the first layer firstly contacts with sand at the bottom of the sand dune and conveys the sand to the magnetic separation device on the first layer, and the sand is discharged from the discharging device on the first layer after magnetic separation; the second layer of sand taking device is contacted with sand with the height corresponding to the sand dune, and the sand is discharged from the second layer of discharging device through magnetic separation and falls on the sand discharged from the first layer; the operation processes of the sand treatment modules on the third layer and above are analogized in turn. When the magnetic separation operation is carried out on sand dunes with the height of dozens of meters, the sand conveying distance of the magnetic separation vehicle in the vertical direction is only twice of the layer height and is not more than 2 meters; the structure can reduce the length of vertical material transportation in the sand transporting process, and energy consumption can be reduced because the energy consumed by the collecting belt 3 during horizontal material transportation is less and the energy consumed by overcoming gravity during vertical material transportation is more.

Example 7: referring to fig. 10, the structure of embodiment 7 of the present invention is schematically illustrated, in this embodiment, the material flow falls from the outside of the collection belt, and the magnet is disposed inside the belt.

Example 8: referring to fig. 11, the structure of embodiment 8 of the present invention is schematically illustrated, in this embodiment, the material flows from the inner side of the outer side of the collecting belt, and the magnet is disposed on the falling side of the belt.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.

Claims

1. The magnetic separation device is characterized in that: comprises a magnet fixing frame plate (4), two groups of rotating shafts (2), a feeding box (6), a collecting box (1) and a collecting belt (3), wherein the magnet fixing frame plate (4) is a plate-shaped body and is vertically arranged, the collecting belt (3) is vertically arranged and can be wound between the two rotating shafts (2), a baffle (8) is arranged on the surface of the collecting belt, the feeding box (6) is arranged above the magnet fixing frame plate (4) and the collecting belt (3), the collecting box (1) is arranged below the magnet fixing frame plate (4) and the collecting belt (3),

at least one side surface of the magnet fixing frame plate (4) is provided with a magnet (7), the magnet (7) is not arranged on the magnet fixing frame plate (4) above the collecting box (1), the magnet (7) and the gap (9) are respectively arranged on two sides of the collecting belt (3), and the gap (9) is arranged on one side with the baffle (8), namely material flow can fall from one side of the collecting belt (3) with the baffle (8).

2. The magnetic separation apparatus of claim 1 wherein: the bottom of the feeding box (6) is funnel-shaped, and the gap (9) is arranged at the lowest funnel-shaped part.

3. The magnetic separation apparatus of claim 1 wherein: the utility model discloses a magnetic separation device, including power pivot (2), magnet fixed frame plate (4), magnet fixed frame plate (2) and passive pivot, pivot (2) divide into the passive pivot of initiative pivot, be equipped with the square hole on magnet fixed frame plate (4), just the square hole is partial to passive pivot and arranges, and is equipped with magnet (7) with the same horizontal position in square hole on passive pivot (2), and the magnetic separation result can not drop when passive pivot (2), concentrates on the one end of power pivot (2) and falls down, and the collecting box is established in power pivot one side promptly.

4. The magnetic separation apparatus of claim 3 wherein: magnets (7) are arranged on both sides of the magnet fixing frame plate (4); alternatively, the magnet (7) penetrates the magnet fixing frame plate (4).

5. The magnetic separation apparatus of claim 1 wherein: the below of feed tank (6) is equipped with sand blocking plate (10), sand blocking plate (10) set up and collect between belt (3) in gap (9), and be the slope form setting or vertical form setting, and sand blocking plate (10) can block the unloading entering of feed tank (6) and collect the region between belt (3) and the fixed frame plate of magnet (4).

6. The magnetic separation apparatus of claim 1 wherein: the magnetic iron is also provided with a discharging belt (12), and the discharging belt (12) is arranged below the magnet (7).

7. The magnetic separation apparatus of claim 1 wherein: the upper part of the feeding box (6) is provided with a gauze (13).

8. A mobile magnetic separator, characterized by comprising a traveling mechanism (11), wherein the traveling mechanism is provided with the magnetic separation device as claimed in claims 1-7.

9. The mobile magnetic separator recited in claim 8 wherein: the material taking mechanism is arranged and is a conveying belt and/or a bucket.

10. The mobile magnetic separator recited in claim 8 wherein: the magnetic separation device is provided with a plurality of groups of magnetic separation devices, and the magnetic separation devices are arranged in a stacked mode and are arranged on different horizontal planes.