KR101136567B1 - Magnetic separator - Google Patents

Abstract

The present invention relates to a magnetic separator. The magnetic separator according to the present invention includes a feeder that receives and feeds the raw material to be sorted and discharged from the feeder, and includes a transfer belt circulated in one direction, and a cylindrical magnet in contact with the inner peripheral surface of one end of the transfer belt, Some of the raw materials that were transferred in one direction from the upper part of the conveying belt are separated from the conveying belt without being attached by the magnetic force of the magnet at the end of the conveying belt, and some of the raw materials are attached and conveyed by the magnetic force of the magnet at the end of the conveying belt. It comprises a separation unit which is transported to the lower portion of the belt and separated from the conveying belt, the separation unit is arranged in plurality, separated into two parts by a magnetic force in the conveying belt of the separating unit disposed at the leading end on the progress path of the raw material The separation unit disposed at the rear end of the raw material of any part of the raw material separated by Magnetic separator characterized in that separated by magnetic force in a hurry again.

Description

Magnetic separator {Magnetic separator}

The present invention relates to a magnetic separator that separates raw materials by magnetic force, and more particularly, to separate and recover useful minerals such as rare earths in the seawater by using magnetic size differences of various useful minerals contained in the seawater. It is about a magnetic separator.

Useful minerals such as ilmenite, rutile, zircon, silimanite, and monazite are used as essential raw materials in various industries. That is, titanium iron is used as a welding rod, a special magnetic material or a sunscreen pigment, zircon is used in ceramics, high-quality bearings, ball mills, and monazite contains a large amount of rare earth elements necessary for high-tech industries.

However, in the case of the above-mentioned minerals, almost all of them depend on imports in Korea, and in recent years, the price of raw minerals soared in the world, and the price has been increasing significantly. For example, rutile and silimite are priced at $ 200 / tonne and zircon at $ 900 / tonne. In addition, with the recent proliferation of resource weaponization by resource-holding countries, resource-holding countries are seeking to prevent the leakage of their resources by expanding export suppression policies, such as increasing export taxes and regulating foreign investment in resource development.

On the other hand, in Korea, since rare minerals, which are widely used in high value-added industries, do not exist on land, almost all of the core materials and parts are imported from abroad. May be affected.

As a result, it is requested to develop the extraction technology for rare minerals in Korea, and as part of this, interest in maritime is increasing.

It is investigated that sand on the coast of Korea, ie sea sand, contains useful minerals such as titanium iron and monazite. In other words, 1.5% of the sea sand consists of the above useful minerals. According to the 2007 Ministry of Construction data, 23 million tons of seawater is reported to be developed and used as construction materials, and 23 million tons contain approximately 500,000 tons of useful minerals, and the economic value of these useful minerals is almost 1 in 2008. That's trillion.

Techniques for recovering useful minerals from seawater have not been actively studied, but recovery techniques using specific gravity screening, magnetic screening, and electrostatic screening are considered to be efficient and economical. Specific gravity screening is to separate by the difference in specific gravity of various minerals contained in the maritime, magnetic screening is to separate according to the magnetic size of the minerals, electrostatic screening is to separate the minerals due to the difference in electrical properties such as electrical conductivity. It is a technique of separation.

Magnetic separators commercialized in Korea are mainly used only in industrial waste, construction waste, and food and chemical powder manufacturing industries.In the case of these magnetic separators, only one magnetic and one nonmagnetic substance is separated by using a single magnet. There is a limit that can not be classified only according to the magnitude of the magnetic force but only works.

That is, in the case of useful minerals extracted from the sea sand, since the magnitude of the magnetic force is varied, the desired degree of mineral recovery cannot be achieved by the simple magnetic separator as described above.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and an object thereof is to provide a magnetic separator having an improved structure to finely separate useful minerals included in the maritime according to the strength of magnetic force.

The magnetic separator according to the present invention for achieving the above object is a feeder in which the raw material to be sorted is received and discharged, a feed belt circulated in one direction while receiving the feed material from the feeder, and a cloud on one end of the feed belt. With a cylindrical magnet in contact, some of the raw material that was transferred in one direction from the top of the conveying belt is separated from the conveying belt without being attached by the magnetic force of the magnet at the end of the conveying belt, the remaining part of the raw material Is attached to the end of the conveying belt by the magnetic force of the magnet is made to include a separating unit which is separated from the conveying belt after being conveyed to the lower portion of the conveying belt, the separation unit is disposed a plurality of, In two parts by the magnetic force of the conveyance belt of the separation unit arranged at the tip of the traveling path It is characterized in that the raw material of any part of the separated and separated raw material is supplied by a separation unit arranged at a rear end on the traveling path of the raw material and separated by magnetic force again.

According to the present invention, three separation units are disposed, and the magnetic force of the magnet of the first separation unit disposed in the progress path of the raw material among the three separation units is 10,000G ~ 11,500 (Gauss) or more, the second arrangement The magnetic force of the magnet of the separation unit is 2,500 ~ 4,000G, the magnetic force of the magnet of the separation unit disposed last is preferably 5,000 ~ 7,000G.

In addition, according to the present invention, a cross-transfer belt which is disposed and circulated in a direction intersecting with the transfer belt of the separation unit on the second separation unit disposed on the advancing path of the raw material, and disposed inside the cross-transfer belt and It is preferable to further include a cross-separation unit having a magnet to suck the raw material conveyed along the transfer belt of the separation unit facing the cross-feed belt by magnetic force to be attached to the cross-feed belt.

In addition, according to the present invention, the magnet installed in the cross-separation unit is an electromagnet that can adjust the magnitude of the magnetic force, the magnitude of the magnetic force of the electromagnet is preferably adjustable in the range of 1,000 ~ 4,000G.

In addition, according to the present invention, the largest on the moving path of the raw material to remove the residual magnetic material of the raw material separated from the conveying belt after being attached by a magnet having the greatest strength of the plurality of separation units It is preferable that a demagnetizer is installed at the rear end of the magnet having magnetic force.

Magnetic separator according to the present invention can be separated according to the strength of the magnetic bar, there is an advantage that can be separated and recovered in detail the useful minerals contained in the sea according to the strength of the magnetic force.

In addition, the magnetic separator according to an embodiment of the present invention has the advantage of being economical and durable by appropriately combining the permanent magnet and the electromagnet.

In addition, the magnetic separator according to an embodiment of the present invention has an advantage that separation efficiency is improved by removing a residual magnetic remaining in the sea by installing a demagnetizer at a rear end of a magnet having a high magnetic force.

The magnetic separator according to the present invention can perform magnetic screening on raw materials in which materials having various magnetic properties are mixed, and in this embodiment, processing of the raw materials is carried out.

In particular, the nautical nautical mileage subject to narrative selection is targeted, not the nautical nautical tract, which has not undergone any treatment in its natural state. That is, relatively light sand components such as siliceous sand are removed from the seawater, and the seawater is treated only with relatively heavy minerals such as ilmenite, rutile, monazite and magnetite. After specific gravity screening, about 96% of the sea sand is classified as sand and removed, and about 4% is classified as useful minerals. However, some useful minerals are contained within 96%, and sand components of about 30-40% are contained within 4% classified as useful minerals.

Hereinafter, with reference to the accompanying drawings, a magnetic separator according to a preferred embodiment of the present invention will be described in more detail.

1 is a side view showing a schematic configuration of a magnetic separator according to a preferred embodiment of the present invention, Figure 2 is a plan view of the magnetic separator shown in Figure 1, Figure 3 is a front view of the magnetic separator shown in Figure 1.

1 to 3, the magnetic separator 100 according to a preferred embodiment of the present invention includes a feeder 10, first to third separation units 20, 30, and 40, and a cross separation unit 50. It is done by

The feeder 10 temporarily receives raw materials, that is, seaweeds, to be sorted, and supplies them to the first separation unit 20 to be described later. Inside the feeder 10 is formed a receiving portion for temporarily receiving the sea s (s). A discharge part is formed in the lower part of the accommodation part, and the discharge part can be discharged from the feeder 10 by opening and closing by a stopper (not shown). The feeder 10 supplies a constant speed and a certain amount of sea sand s to the first separation unit 20 which will be described later.

The sea sand s discharged from the feeder 10 is guided by the discharge guide 11 and is transferred to the first separation unit 20. The discharge guide 11 is inclined downward in a plate shape. In addition, the discharge guide 11 is oscillated in the left and right direction, so that the sea sand s placed on the upper surface of the discharge guide 11 can spread widely in the left and right width directions.

In the present invention, a plurality of separation units are provided to finely separate the sea sand according to the strength of the magnetic force. In this embodiment, three separation units, that is, the first separation unit 20, the second separation unit 30 and the first separation unit Three separation units 40 are provided. Three separation units are arranged along the vertical direction. That is, the first separation unit 20 is disposed at the highest position, and the second separation unit 30 is disposed at the lowest position of the third separation unit 40 in the middle.

The sea s discharged from the feeder 10 forms a path that proceeds from the first separation unit 20 to the third separation unit 30 through the second separation unit 30, and passes through each separation unit. Whenever, depending on the size of the magnetic force is divided into parts of the maritime. That is, part of the sea sand separated into two parts according to the size of the magnetic in the first separation unit 20 is collected by the collector 29, the remaining part is supplied to the second separation unit 30 again. In the second separation unit 30, the sea ash is divided into two parts again according to the magnetic strength, a part of which is collected by the collector 39, and the other part is supplied to the third separation unit 40. Finally, the third separation unit 40 is collected in separate collectors 48 and 49, respectively, according to the magnetic strength. In the present embodiment, three separation units are installed, but in another embodiment, the separation units may be installed in various numbers such as two, four, five, and the like.

The first separation unit 20, the second separation unit 30 and the third separation unit 40 are called differently, but have substantially the same configuration, only the strength of the magnet is different.

That is, the first to third separation units 20, 30, and 40 are provided with conveying belts (21, 31, 41), respectively. Cylindrical magnets 22, 32 and 42 are in rolling contact with one end of the conveyance belts 21, 31 and 41, and pulleys 23, 33 and 43 on the inner circumferential surface of the other end of the conveyance belts 21, 31 and 41. ) Is cloud contact. That is, each of the conveying belts 21, 31, 41 is wound around two pulleys installed at both ends thereof, and circulated by rolling contact with the pulleys when the pulley is rotated. Here, the pulley disposed at one end of the conveying belt (21, 31, 41) is made of a cylindrical magnet (22, 32, 42), the pulley (23, 33, 43) disposed at the other end is purely of the pulley Only play a role.

A motor (not shown) is connected to the pulleys 23, 33, and 43 disposed at the other end of each separation unit, and the driving force for circulating the conveying belts 21, 31, and 41 by rotating the pulleys 23, 33, and 43. To provide. On the other hand, the cylindrical magnets 22, 32, and 42, which serve as pulleys, are not fixedly installed but can be replaced with cylindrical magnets having different magnetic strengths.

In addition, the first and second separation units 20 and 30 have one collector 29 and 39, respectively, but the third separation unit 40 disposed at the end of the traveling path of the maritime has two collectors 48. 49).

Between each separation unit and the collector is provided with a guide for guiding the discharged from each separation unit to the collector or other separation unit. For example, a collector 29 and a second separation unit 30 are disposed below the first separation unit 20, between the transfer belt 21 and the collector 29 of the first separation unit 20, and the first separation unit 20. Guide bars 25 and 26 are installed between the transfer belt 21 of the separation unit 20 and the transfer belt 31 of the second separation unit 30, respectively. The guides 25 and 26 are inclined downward in a plate shape to guide the sea discharges discharged from the isolator belt 21 of the first separation unit 20 to the collector 29 and the second separation unit 30, respectively. do.

Similarly, in the second separation unit 30, the second separation unit 30 is inclined downwardly between the conveyance belt 31, the collector 39, and the isolbel 41 of the third separation unit 40. Stands 35 and 36 are installed. Since the third separation unit 40 is disposed at the end of the traveling path of the sea, two collectors 48 and 49 are provided below the transfer belt 41 of the third separation unit 40. Guide bars 45 and 46 are also provided between the conveyance belt 41 of the 40 and the two collectors 48 and 49.

The sea s (s) transferred along the transfer belt of each separation unit passes through the upper side of the cylindrical magnet located at the end of the transfer belt, which is not affected by the magnetic force of the magnet, leaving the separation unit at the end of the transfer belt. Done. However, the sea responsive to the magnetic force of the magnet is continuously attached to the transfer belt to move downwards, and when it is out of the influence of the magnetic force it will fall down from the transfer belt. That is, the seas attached to the magnets installed in each separation unit are separated from the transport belt after the transport belt is moved downward while the transport belt is attached to the transport belt, but the seas not attached to the magnet are transported from the top to the bottom. By being separated from the feed belt, the sea splits into two parts depending on the degree of magnetism.

Meanwhile, a demagnetizer 70 is installed at the lower end of the guide stand 26 installed between the transfer belt 21 of the first separation unit 20 and the transfer belt 31 of the second separation unit 30. . As will be described later, in this embodiment, the magnetic force of the magnet 22 installed in the first separation unit 20 is 11,000 gauss, which is much greater than the magnetic force (1,000 to 7,000 gauss) of the magnet installed in the other separation units.

That is, the seawater supplied to the second separation unit 30 after being attached to the magnet 22 installed in the first separation unit 20 once is retained by the magnet 22 of the first separation unit 20. Remaining, thus remaining residual magnetic in the sea will interfere with the correct separation action by the magnet of the second separation unit (30).

In the process of being transferred from the first separation unit 20 to the second separation unit 30, a known demagnetizer 70 is installed below the guide stand 26 to remove residual magnetic residue in the sea sand. In the present embodiment, a demagnetizer is installed between the first separation unit and the second separation unit, but the demagnetizer may be disposed at the rear end of the magnet having the largest magnetic force in the traveling path of the sea.

On the other hand, the magnetic separator 100 according to the present invention is provided with a cross separation unit (50). The cross separation unit 50 is installed on the transfer belt 31 of the second separation unit 30, and has a cross transfer belt 51 and two pulleys 52 and 53. The cross transfer belt 51 is disposed orthogonally to the transfer belt 31 of the second separation unit 30, and the two pulleys 52 and 53 are wound around both ends of the cross transfer belt 51 to cross the transfer belt. Cloud contact with (51). The cross feed belt 51 is circulated by the pulley 52 which is rotated by a motor (not shown).

The magnet 54 is also installed inside the cross separation unit 50. The lower surface of the magnet 54 is disposed to face the lower surface of the cross transfer belt 51. Accordingly, some of the sea sand isotropic along the transfer belt 31 of the second separation unit 30 is attracted by the magnetic force of the magnet 54 installed in the cross separation unit 50 and attached to the cross transfer belt 51. .

As described so far, the magnetic separator 100 having the above-described configuration is provided with the first to third separation units 20, 30 and 40 and the cross separation unit 40 to perform four separate actions for the maritime. In order to finely sort the useful minerals mixed in the sea sand by four separation operations, the magnetic force of the magnets attached to each separation unit 20 to 50 needs to be set according to the characteristics of the useful minerals. That is, it is possible to set the magnetic force of the magnet to be installed in each separation unit only when technical and chisel data about the degree to which each useful mineral recoverable from the sea is affected by the magnetic force is obtained.

First, the magnetic properties are briefly described.

Magnetism is expressed by the amount of magnetic and magnetic moment, and the strength of the magnet is generally expressed by the magnitude of the magnetic moment rather than the magnetic amount. Magnetic moment is a vector quantity of magnitude and direction, and the direction is from the S (-) pole to the N (+) pole. In general, they are classified into ferro-magnetism, antiferro-magnetism, para-magnetism, and dia-magnetism according to the arrangement of magnetic moments. If the magnetic moments are arranged in one direction, the force is very strong, and it is called Ferro-Magnetism. The magnetic moments of the magnetic spins are arranged in opposite directions to the neighboring magnetic moments, but the magnetisms that are magnetized by the difference due to the magnitude of the magnetic moments are classified as Ferri Magnetism. In addition, the magnetic moment of magnetic spin is the same size as the neighbor but the direction is reversed so that the overall magnetic moment becomes zero. It is called antiferro-magnetism. However, the material having the property of increasing the strength of the internal magnetic field by aligning in the same direction as the direction of the external magnetic field is para-magnetism, and has a weak negative autonomy with no spin as dia-magnetism. Classify. In addition, the magnetic moment may be obtained by a constant equation based on magnetic sensitivity, magnetic field strength and particle diameter.

Table 4 shows the classification of useful minerals in the sea by the above classification system. 4 is a table showing the content and magnetic sensitivity of the rare minerals contained in the sea sand. Referring to FIG. 4, the useful minerals in the sea sand contain the most of ilmenite and magnetite, and also include a large number of silica sand and silimite that can be classified as sand. Magnetically, magnetite and ilmenite have the highest magnetic sensitivity, and zircon is almost nonmagnetic.

Considering the content in the sea sand, the main useful minerals to be recovered from the sea sand are magnetite, ilmenite, rutile and monazite.

The applicant determines the strength of the magnetic force to be applied to the target mineral to be screened from the sea (based on the determination of the strength of the magnet installed in each separation unit) The same). After specific gravity screening of the sea samples collected from Yeongjong Island, four magnets (one 200g and three 50g) were used to obtain high magnetic force sequentially from low-magnetism magnets using several magnets with magnetic force from 1,000G to 11,000G. Branches were arranged in magnet order to sort seawater, and the strongest magnets were placed first and then the magnets were placed in descending order. Magnets used were 1,500G, 3,000G, 5,000G, 7,000G and 10,000G.

Useful mineral photographs selected by this experiment are shown in FIGS. 5 and 6. The left picture of FIG. 5 is ilmenite as a specifically selected mineral at a magnetic force in the range of approximately 3,000 G, and the right picture is rutile as a mineral that can be specifically obtained at a magnetic force of 10,000 G or more. 6 is a non-magnetic material, rutile (magnetic force of 10,000G or more), ilmenite (about 4,000G), and epidot (about 7,000G) clockwise from the upper left.

Based on the above empirical considerations, the target mineral to be finally selected from the maritime was determined, and the strength of the magnet for selecting this target mineral was also determined. The results are shown in FIG.

Referring to FIG. 7, the main target minerals to be separated through the magnetic separator according to the present invention are largely classified into five categories, the ferromagnetic magnetite, the heavy magnetic ilmenite, the weak magnetic epidot, horn blend and hematite, and Rutile and monazite, which are the weak magnetic, and zircon, which are nonmagnetic.

Magnetite is a ferromagnetic material attached to magnets even in weak magnetic forces of 1,000G to 2,000G. Therefore, it is not necessary to use a magnet higher than 2,000G, but less than 1,000G may have a weak magnetic force, which may reduce the separation efficiency. The magnetite is screened with a magnetic force of 1,500 G.

Ilmenite, a magnetic material, is screened with magnetic force of 3,000G and can be expanded to 2,500G to 4,000G. However, magnetic force less than 2,500G will reduce the magnet adhesion rate of ilmenite, and if it exceeds 4,000G, it is not preferable to use higher magnetic force than necessary.

The weak magnetic epidots, horn blends, and hematites can be separated from 5,500 G and from 5,000 to 7,000 G. However, if less than 5,000G, the weak magnetic material is not easy to separate, and exceeding 7,000G is unnecessary because it is excessive magnetic force.

Likewise, rutile and monazite have very low magnetic sensitivity and can be separated using high magnetic force of 8,000 ~ 10,000G. Zircon, which is a nonmagnetic material, is not attached to a magnet, so it will behave together with the sand component in the magnetic separator, and can be separated from the sand later in the electrostatic screening.

As described above, in the state where the target minerals and the strength of the magnetic force required to select the target minerals are determined, a magnet is installed in each separation unit 20, 30, 40, 50 of the magnetic separator 100 according to the present invention. Can be.

The magnet 22 of the first separation unit 20, which is first disposed on the path of the hat, has a magnetic force of 11,000G. Therefore, all of the magnetic material during the maritime is attached to the magnet 22 of the first separation unit 20 and supplied to the second separation unit 30, and the zircon and sand components, which are nonmagnetic materials, are not attached to the magnet 22 and are collected without the collector ( 29) are collected. In the first separation unit, the target mineral zircon is separated by separating the magnetic material and the nonmagnetic material.

Maritime supplied to the transfer belt 31 of the second separation unit 30 meets the transfer belt 51 of the cross separation unit 50, the magnet 54 of the cross separation unit 50 is 1,000 ~ as an electromagnet The magnetic force can be changed in the range of 4,000G, which is set to 1,500G in this embodiment. Accordingly, magnetite, a ferromagnetic material, is transported by the magnetic force of 1,500 G among the seaweeds being transferred from the transport belt 31 of the second separation unit 30, and is attached to the cross transport belt 51 of the cross separation unit 50. Maritimes continue to move toward the magnet 32 of the second separation unit 30. The magnetite attached to the cross transfer belt 51 by the magnet 54 of the cross separation unit 50 is separated from the cross transfer belt 51 and freely falls after leaving the area of the magnet 54 and the collector 59. To be collected.

That is, in the cross-separation unit, magnetite, which is a target mineral, is selected, and when the first separation unit 20 and the cross-separation unit 50 pass through, almost non-magnetic and ferromagnetic substances are selected. Thereafter, the second separation unit 30 and the third separation unit 40 select the neutral magnetic material and the weak magnetic material.

The magnet 32 of the second separation unit 30 is set to 3,000 G, and selects the ilmenite, which is a heavy magnetic material. That is, the magnetic magnetic ilmenite is attached to the magnet 32 of the second separation unit 30 is moved to the lower side of the conveying belt 31 and then collected in the collector 39, the weak magnetic material of rutile, monazite, Epidots, horn blends, and hematite are not attached to the magnet 32 and are immediately separated from the transfer belt 31 of the second separation unit 30 and supplied to the third separation unit 40.

In the third separation unit 40, a magnet 42 having a magnetic force of 5,500 G is installed, and epidots, horn blends, and hematites among the weak magnetic bodies are attached to the magnets 42 to the lower portion of the transfer belt 41. After being transported, it is collected in the collector 48, and rutile and monazite, which are weaker than these, are not attached to the magnet 42 and are immediately separated from the transport belt 41 and collected in another collector 49. That is, the third separation unit 40 selects the minerals having relatively strong magnetism and the minerals having relatively weak magnetism in the weak magnetic body.

As described above, after the specific gravity screening, the seaweed (corresponding to 4% before the specific gravity screening) is supplied from the feeder 10 and then separated from the zircon, which is a nonmagnetic material, in the first separation unit 20, and then the cross separation unit. The ferromagnetic magnetite is screened at 50 and the neumenite at the second separation unit 30 is screened. Finally, the rutile and monazite are screened at a third separation unit 40 in one classification, and epitaxial. Dots, hematite and horn blends are sorted into one category.

Each collector 29, 39, 48, 49, 59 has a collection of minerals separated by magnets 22, 32, 42, and 52, but they do not contain purely the target minerals and some other minerals. have. That is, in the collector 39 in which ilmenite, which is a magnetic substance, is collected, a part of the magnetite, which is a ferromagnetic substance, and an epidot, which is a weak magnetic substance, are mixed. This is not only a matter of magnetism, but also various variables such as the size and weight of each mineral particle. However, the minerals collected in each collector may increase purity through electrostatic screening or separate magnetic screening.

On the other hand, in the present embodiment it is possible to change the strength of the magnetic force as needed by using an electromagnet in the cross-separation unit 50, it is also possible to replace the cylindrical magnets of the first to third separation units (20, 30, 40) Designed as a structure, there is an advantage that the strength of the magnet can be changed according to the characteristics of the maritime.

And the magnets of the first to third separation unit is reinforced by using a permanent magnet, and the durability is enhanced by using an electromagnet only to screen the magnetite (ferromagnetic material) that can be selected even if the strength of the magnetic force is weakest. For example, in order to select the weak magnetic material with the electromagnet, the strength of the magnetic force must be increased, so that not only the power consumption of the electromagnet is high but also the heat generation of the electromagnet reduces the sorting efficiency.

Although the present invention has been described with reference to one embodiment shown in the accompanying drawings, this is merely exemplary, and various modifications and equivalent other embodiments are possible to those skilled in the art. I can understand. Accordingly, the true scope of protection of the present invention should be determined only by the appended claims.

1 is a side view showing a schematic configuration of a magnetic separator according to a preferred embodiment of the present invention.

FIG. 2 is a plan view of the magnetic separator shown in FIG. 1.

FIG. 3 is a front view of the magnetic separator shown in FIG. 1.

4 is a table showing the content and magnetic sensitivity of the rare minerals contained in the sea sand.

5 and 6 are photographs of rare minerals separated by magnetic screening experiments.

7 is a table showing the target minerals to be screened from the sea by the magnetic separator according to the present invention, and the size of the magnet for selecting the target minerals.

<Explanation of symbols for the main parts of the drawings>

100 ... magnetic separator 10 ... feeder

20 ... 1st separation unit 30 ... 2nd separation unit

40 ... third separation unit 50 ... cross separation unit

Claims (10)

A feeder in which sea sand, which is a raw material, to be sorted is accommodated and discharged; The feed belt is supplied with the raw material from the feeder and is circulated in one direction, and a cylindrical magnet in contact with the rolling on the inner peripheral surface of one end of the conveying belt, some of the raw material was transferred in one direction from the upper portion of the conveying belt is the conveying belt It is separated from the conveyance belt without being attached by the magnetic force of the magnet at the end of, the remaining portion of the raw material is attached by the magnetic force of the magnet at the end of the conveyance belt is transferred to the lower portion of the conveying belt and then conveyed It comprises a; separating unit that is separated from the belt, At least three separation units are disposed, and the raw material of any part of the raw material separated and separated from the two parts by magnetic force in the transfer belt of the separating unit disposed at the leading end of the raw path on the raw path of the raw material on the moving path of the raw material. The separation unit arranged at the rear end is supplied and separated again by magnetic force, The magnetic force of the magnet of the first separation unit in the progress path of the raw material is 10,000G ~ 11,500 (Gauss) or more, the magnetic force of the magnet of the second separation unit is 2,500 ~ 4,000G, the third separation unit Magnetic separator of the magnet is characterized in that 5,000 ~ 7,000G. delete delete delete The method of claim 1, A cross-feed belt disposed in a direction crossing the transfer belt of the separation unit and circulated on the second separation unit disposed on the traveling path of the raw material, and disposed inside the cross-feed belt to face the cross-feed belt; And a cross-separation unit having a magnet to suck the raw material transferred along the transfer belt of the separation unit by magnetic force to be attached to the cross-transfer belt. The method of claim 5, Magnets installed in the cross-separation unit is a magnetic separator, characterized in that the electromagnet that can adjust the size of the magnetic force. The method of claim 6, Magnetic force sorter, characterized in that the size of the magnetic force of the electromagnet is adjustable in the range of 1,000 ~ 4,000G. The method of claim 1, Cross transfer belt circulated and disposed in the direction crossing the transfer belt of the separation unit on any one of the separation unit of the plurality of separation units; A cross-separation unit having a magnet disposed inside the cross-transfer belt and attracting the raw material transferred along the transfer belt of the separation unit facing the cross-transfer belt by magnetic force to be attached to the cross- transfer belt. Magnetic separator characterized in that it further comprises. The method of claim 1, To remove the residual magnetic material of the raw material separated from the conveying belt after being attached by a magnet having the greatest strength of the plurality of separation units, And a demagnetizer is installed at a rear end of the magnet having the largest magnetic force on the moving path of the raw material. The method of claim 1, The cylindrical magnet is a pulley for rotating the transfer belt, And said cylindrical magnet is replaceable with a cylindrical magnet having a different strength of magnetic force.

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