KR102117408B1 - Stainless steel magnetic separator for wood waste - Google Patents

Abstract

The present invention relates to a stainless steel sorter for wood chips. The sorter includes: a support frame; a rotating drum rotatably installed at one end of the support frame; a high-magnetic sorting unit rotatably installed at the other end of the support frame; and a belt member formed so as to surround the rotating drum and the high-magnetic sorting unit and unidirectionally moving the wood chips supplied to an upper surface when at least one among the rotating drum and the high-magnetic sorting unit rotates. The high-magnetic sorting unit includes: a shaft having both side ends rotatably installed on one side of the support frame; magnets having middle passage holes into which one side of the shaft is inserted and coupled to the outer surface of the shaft such that the same poles face each other; and a steel plate interposed between the magnets. The sorter generates a magnetic force of 12,000 gauss to 14,000 gauss while rotating. According to the present invention, the magnetic sorting unit can be simple in configuration and minimized in volume. In addition, an ultra-high magnetism of 12,000 gauss to 14,000 gauss is provided. As a result, the efficiency of sorting of the stainless steel contained in the wood chips can be significantly increased and the reliability of the stainless steel sorting can be improved.

Description

Stainless steel magnetic separator for wood waste {Stainless steel magnetic separator for wood waste}

The present invention relates to a stainless steel sorting device for wood chips, and more specifically, by configuring the magnetic separation unit only with a simple configuration, it is possible to minimize the volume while providing ultra-high magnetic force of 12,000G (gauss) to 14,000G. The present invention relates to a stainless steel sorting device for wood chips capable of improving the sorting reliability of stainless steel by greatly increasing the sorting efficiency of the stainless steel included therein.

Many structures, such as bridges, roads, and various structures created during the process of urbanization and industrialization are gradually deteriorating over the years, and especially in recent years, reconstruction and redevelopment have been actively promoted in many areas to improve residential culture. have.

A large amount of construction waste is generated in the process of dismantling, reconstruction, and redevelopment of these old structures, and if you want to reclaim such construction waste, it requires not only an extensive landfill area but also a considerable amount of landfill cost, and the environmental part There are also harmful effects, and various measures for recycling construction waste have been devised in terms of protection of the natural environment and efficiency of resources, and various devices for recycling have been developed and used therefrom.

Accordingly, waste generated during the dismantling of construction and building structures is collected through a predetermined place, and then through a series of intermediate treatment processes, such as a crushing process, a foreign material sorting process, a recycled aggregate and mortar sorting process, and a mortar peeling process attached to the recycled aggregate surface It is produced with quality resources.

On the other hand, construction waste contains mixed impurities including wood chips, waste synthetic resins such as styrofoam, metals such as reinforcing bars, waste papers, and waste fibers used as cement enhancers, and various impurities are mixed. Construction wastes are separated for incineration and recycling through treatment.

In particular, the wood chip can be reused in various industrial fields such as biomass fuel such as particle board, pet litter, crop soil cover (mulching), and wood chip through the above intermediate treatment process.

Here, looking at the intermediate process for recycling the wood chips, the iron chips are sorted while passing through the iron magnetic separator during the process where the wood chips are conveyed by the conveyor. After being transferred to the non-ferrous metal contained in the wood chip is sorted by a non-ferrous metal sorter.

However, in the case of a metal made of non-magnetic or very low magnetic, such as austenitic stainless steel, there is a problem in that it is very difficult to select this because the screening efficiency is very low only by the magnetic force of the steel magnetic separator.

On the other hand, in the case of the austenitic stainless steel, which is a non-magnetic structure, when the steel is subjected to plastic deformation in the process of being crushed by a jaw crusher, a part of the austenite structure is transformed into martensite, resulting in very slight magnetism. Efforts have been made to screen stainless steel using permanent magnets.

However, as the stainless steel is plastically deformed, the magnetism generated in some areas of stainless steel not only has very little magnetism, but also requires substantial volume, weight, and area to increase the Gaussian value of the actual permanent magnet. In a narrow interior space, it is difficult to realize a high Gauss of 10,000 G (gouss) or more with a permanent magnet alone. In fact, there is a problem that the selection efficiency of stainless steel is extremely low.

The present invention has been devised to solve the above problems, and the object of the present invention is to provide an ultra-high magnetic force of 12,000G (gauss) to 14,000G while minimizing the volume by configuring the magnetic separation unit with a simple configuration. Accordingly, the present invention provides a stainless steel sorting apparatus for wood chips that can improve the sorting reliability of stainless steel by greatly increasing the sorting efficiency of stainless steel included in the wood chip.

According to an aspect of the present invention for achieving the above object, in a stainless steel sorting apparatus for wood chips for sorting stainless steel from wood chips, a support frame and a rotating drum rotatably installed at one end of the support frame And, a high magnetic force selecting portion rotatably installed on the other end of the support frame, and formed to surround the rotating drum and the high magnetic force selecting portion, at least one of the rotating drum or the high magnetic force selecting portion rotates If the case includes a belt member for moving the wood chip supplied to the upper surface in one direction, the high magnetic force selector is a shaft on which both ends are rotatably installed on one side of the support frame, a through hole is formed in the center of the shaft One side is inserted into the through hole and coupled to the outer surface of the shaft, interposed between a plurality of magnets coupled to the shaft so that the same poles face each other, and the outer periphery in the inner region of the outer periphery. Provided is a stainless steel sorting device for wood chips comprising a steel plate in which a plurality of holes are formed along a direction, and generating 12,000G (gauss) to 14,000G of magnetic force while rotating.

In addition, the steel plate is preferably formed with a plurality of irregularities on the outer surface.

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In addition, it is preferable that the horizontal width is relatively longer than the vertical width.

In addition, a plurality of steel plates may be installed on one side of the outer surface of the shaft according to the number of installations of the magnets, and an area between the holes and the holes may be misaligned.

According to the present invention as described above, it is possible to minimize the volume by configuring the configuration of the magnetic force selection unit only with a simple configuration, while providing ultra high magnetic force of 12,000G (gauss) to 14,000G to select the stainless steel contained in the wood chip. By greatly increasing, there is an effect that can improve the reliability of the sorting operation of stainless steel.

1 schematically shows a stainless steel sorting device for wood chips according to an embodiment of the present invention,
Figure 2 is a perspective view of the magnetic force selection unit according to an embodiment of the present invention,
Figure 3 is an exploded perspective view of the magnetic force selection unit according to an embodiment of the present invention
Figure 4 is a view showing a state in which the magnet of the magnet is moved to the steel plate according to an embodiment of the present invention,
5 is a view showing the operation of the stainless steel is sorted from the wood chip by a stainless steel sorting apparatus for wood chips according to an embodiment of the present invention,
Figures 6a and 6b is a view showing the shape of a steel plate according to another embodiment of the present invention,
7 is a view showing a coupling structure between two magnetic bodies depending on whether a hole is formed,
8 is a diagram showing a model for calculating the coupling force between magnetic bodies using electromagnetic force;
9 is a view showing a state in which the magnetic force in the steel plate is moved according to another embodiment of the present invention,
10 is a view showing the installation state of the steel plate according to another embodiment of the present invention.

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

1 is a view schematically showing a stainless steel sorting device for wood chips according to an embodiment of the present invention, Figure 2 is a perspective view of a magnetic force selector according to an embodiment of the present invention, Figure 3 is an embodiment of the present invention It is an exploded perspective view of the magnetic force selector according to an example.

1 to 3, the wood chip stainless steel sorting device 1 according to an embodiment of the present invention includes a support frame 10, a rotating drum 20, a high magnetic force selector 30 and a belt It comprises a member 40.

The support frame 10 is formed in a substantially table shape, and is installed in an installation target area, and provides an installation area of the rotating drum 20 and the high magnetic force selection part 30 and the belt member 40, which will be described later. It supports and serves to facilitate the selection of stainless steel by them.

The rotating drum 20 is formed in a substantially cylindrical shape, and is rotatably installed at one end of the support frame 10 to support one side of the belt member 40 to be described later, and the high magnetic force selection section 30 to be described later When rotating, the belt member 40 is stably rotated so that the wood chip supplied to the upper surface of the belt member 40 can be easily moved in one direction.

The high magnetic force selection part 30 has a shaft 31 in which both ends are rotatably installed at one side of the other end of the support frame 10, and one side is connected to the shaft 31 to provide rotational force to the shaft 31 It comprises a power supply means (32), a plurality of magnets (33) coupled to the outer surface of the shaft (31), and a steel plate (34) interposed between the magnets (33) and the magnets (33).

The high magnetic force selection unit 30 serves to provide rotational force to the belt member 40, which will be described later, while rotating, and to generate high magnetic force of 12,000G (gauss) to 14,000G to select stainless steel included in the wood chip. do.

The shaft 31 is formed in a substantially circular rod shape, and as described above, both side ends are rotatably installed on one side of the other end of the support frame 10, respectively, and supported by a magnet 33 coupled to the outer surface. When the rotational force is provided as a power means to serve to transmit the rotational force to the magnet (33).

As the power means, a general motor can be used, and the motor shaft is connected to one side of the shaft 31 to serve to provide rotational force to the shaft 31. Such power means are commonly used for those skilled in the art. As it is obvious that it is known to be able to purchase and use what is supplied, specific configuration descriptions will be omitted.

The magnet 33 is formed in a disk shape in which a through hole 33a is formed in a mass center, and one side of the shaft 31 is inserted into the through hole 33a described above, and is coupled to the outer surface of the shaft 31. The same poles are coupled to the shaft 31 so that the same poles face each other, and such a magnet 33 serves to generate a magnetic force applied to the steel plate 34.

The steel plate 34 is formed in the shape of a hollow disc corresponding to the magnet 33, interposed between the magnet 33 and the magnet 33, and provides a magnetic line path of the magnets 33 located on both sides to provide a narrow space. By generating a magnetic force on the outer surface, it plays a role of generating a high magnetic force of 12,000G (gauss) to 14,000G.

Figure 4 is a view showing a state in which the magnet of the magnet is moved to the steel plate according to an embodiment of the present invention, Figure 5 is stainless steel from a wood chip by a stainless steel sorting device for wood chips according to an embodiment of the present invention This is a view showing an operation in which steel is sorted.

The operation of the stainless steel sorting apparatus for wood chips 1 according to an embodiment of the present invention having such a configuration will be described with reference to FIGS. 4 and 5 as follows.

First, when the crushed wood chip is supplied to the upper surface of the belt member 40, the magnetic force selector rotates, and thus the wood member transfers the wood chip in the direction of the magnetic force selector while the belt member 40 rotates.

At this time, the magnetic force generated in the magnet 33 is moved in the direction of the steel plate 34, which is a magnetic material, because the magnetic forces of the magnets 33 located at both sides of the steel plate 34 are moved to the steel plate 34. Accordingly, the steel plate 34 has a polarity corresponding to the polarity of the magnets 33 located on both sides.

And, as the magnetic force moved to the steel plate 34 is emitted to the outside through the narrow outer surface of the steel plate 34, it may generate ultra-high magnetic force of 12,000G (gauss) to 14,000G.

Accordingly, the stainless steel having the slightest magnetism rotates together with the magnetic force selector on the surface of the belt member 40 by the ultra-high magnetic force generated from the steel plate 34, and at a position where gravity is greater than the attraction force of the magnetic force selector for pulling stainless steel. It is eliminated from the belt member 40, falls downward, is collected in a collection container prepared in advance, and then taken out.

The other wood chips fall downward by gravity while passing through the other end of the belt member 40, but fall at a position spaced apart from the falling point of stainless steel by the inertia by the moving speed.

Wood chips from which stainless steel is selected may be supplied by falling to the upper surface of a belt conveyor for sorting non-ferrous metals according to the working environment, or collected separately from stainless steel and transferred to the next process.

6A and 6B are views showing the shape of a steel plate according to another embodiment of the present invention, FIG. 7 is a view showing a coupling structure between two magnetic bodies depending on whether holes are formed, and FIG. 8 is using electromagnetic force FIG. 9 is a diagram illustrating a model for calculating the coupling force between magnetic bodies, and FIG. 9 is a diagram illustrating a state in which magnetic forces in a steel plate are moved according to another embodiment of the present invention.

In order to generate ultra-high magnetic force of 12,000G (gauss) to 14,000G, a very large magnet 33 and a thin steel plate 34 are required. Accordingly, the manufacturing cost of the magnet 33 increases and the magnetic flux steel plate ( The disadvantage of being concentrated in a very narrow width section of 34) may occur.

6A and 6B, the basic configuration is the same as that of FIGS. 1 to 5, but is formed in a structure capable of effectively increasing the surface magnetic flux density of the steel plate 34.

6A and 6B, this embodiment forms a plurality of irregularities Y on the outer surface of the steel plate 34, unlike the previous embodiment, or the outer circumferential direction in the inner region of the outer periphery of the steel plate 34. A plurality of holes H are formed.

Here, the number of holes H formed in the steel plate 34 and the area of the holes H are preferably set in a range in which the magnetic flux due to the magnet 33 is not saturated, where the magnetic flux is saturated. Means a state in which the magnetic flux does not increase any more even though the area of actual contact between the magnet 33 and the steel plate 34 becomes less than a certain level.

Further, the hole H according to FIG. 6B is shown to be formed in a spherical shape, but may be formed in various shapes such as a long hole shape having a length, a sprite shape, and the like.

7 shows a structure in which the magnet 33 and the steel plate 34 are combined, (a) shows a case in which a hole is not formed in the steel plate, and (b) a hole in the steel plate It shows a case made of this formed structure.

As shown in FIG. 7, the steel plate 34 and the magnets 33 located on both sides of the steel plate 34 are magnetized in a space where a parallel magnetic field exists, and the magnetic force may be generated in the steel plate 34. have.

In the case of (a) in an ideal parallel magnetic field, a mutual pulling force acts between the steel plate 34 and the magnet 33. At this time, mechanical stress is generated between the steel plate 34 and the magnet 33 by the force to be attached to each other, and this mechanical stress can be mathematically calculated through the Maxwell stress equation to which the virtual void is applied.

The virtual void is a concept that enables the calculation of magnetic force between magnetic bodies in contact, and is applied to a technique for accurately calculating the magnetic force between magnetic bodies by placing a very thin air layer between the magnetic bodies in contact.

That is, as shown in FIG. 8, an air layer having a thickness of “0 mm” is placed between two magnetic bodies that are in contact with each other, and the permeability is set to μ ₀ to form a field in virtual air-gap from the boundary conditions of the field. You can calculate the value.

On the other hand, in the structure shown in FIG. 7, since the magnetic flux passing through the magnetic body in the parallel magnetic field only has a vertical component, applying the Maxwell stress equation to the structure of FIG. 7 can be expressed as Equation (1).

At this time, in the structure of FIG. 7, when the surfaces in which the two magnetic bodies are in contact are integrated by the Maxwell stress equation, it is possible to calculate the total force of each of the two magnetic bodies at the contact surface.

On the other hand, in Figure 7, when the magnetic material is not saturated, the total magnetic flux that passes through the magnetic material in the structures (a) and (b) is the same. When the total magnetic flux (Φ) in the structures (a) and (b) of FIG. 7 is the same, the magnetic flux is the magnetic flux density multiplied by the area, so the product of the magnetic flux density (B _vgn ) and the area (S) in the structure (a) is (b) Same as the product of magnetic flux density (B ' _vgn ) and area (S') in the structure.

At this time, as shown in Equation 2, the area (S) of the contact surface in the structure (a) is twice the area (S ') of the contact surface in the structure (b), and the magnetic flux density (B _vgn ) of the structure (a) is (b ) It should be 1/2 times the magnetic flux density (B ' _vgn ) of the structure.

That is, the magnetic force formed on the contact surface between the two magnetic bodies of the structure (a) and the magnetic force formed on the contact surface between the two magnetic bodies of the structure (b) have the same condition as in Equation (3).

Through Equation 3, it can be seen that the difference in area between the two magnetic bodies that are actually in contact with each other changes the bonding force between the two magnetic bodies due to the magnetic force between the two magnetic bodies.

That is, when a groove is formed in the magnetic field environment as shown in FIG. 8 (b), and the contact surface area between the two magnetic bodies is reduced by 50% compared to the structure (a), the coupling force due to the magnetic force between the two magnetic bodies is compared to the structure (a) ) 2 times in structure.

In other words, when the contact area between the magnet 33 and the steel plate 34 is reduced by the uneven (Y) shape or the hole (H), the magnetic force transmitted to the steel plate 34 is proportionally improved.

On the other hand, in the case of the uneven structure, since the concave portion is exposed to the outside, problems such as interfering with foreign matter may occur, so it is preferable that the hole (H) structure is used.

In addition, as shown in FIG. 9, in the case of the hole (H) structure, the bar hole (H) and the hole (the magnetic force transferred to the steel plate 34 is emitted to the outside through the region between the hole (H) and the hole (H) ( H) As the branch force is diverged in a more focused state through the interregion, the surface magnetic flux density of the steel plate 34 is increased, and thus, the screening efficiency of stainless steel can be further improved.

Other structures are the same as the above-described basic embodiment, and the rest of the description will be omitted.

10 is a view showing the installation state of the steel plate according to another embodiment of the present invention.

The basic configuration of the embodiment of FIG. 10 is the same as that of FIGS. 2 to 9, but is formed in a structure capable of further improving the surface magnetic force of the high magnetic force selection unit 30.

10, in the present embodiment, in the installation of the steel plate 34 on the outer surface of the shaft 31, it is installed between the magnet 33 and the magnet 33, a plurality of magnets 33 When the plurality of steel plates 34 are installed according to the installation, the regions between the adjacent steel plates 34 and the steel plates 34 holes H and holes H are installed to be displaced from each other.

In other words, when the outer peripheral surface area corresponding to the area between the hole H and the hole H of the steel plate 34 is defined as the S area S, the neighboring steel plates 34 and S of the steel plate 34 As the 'areas S' are installed to be deviated from each other at a certain angle (θ), it is possible to further improve the surface magnetic force of the high magnetic force selection unit 30 while forming a uniform magnetic flux density across the entire surface.

Other structures are the same as the above-described basic embodiment, and the rest of the description will be omitted.

Although the invention has been described in connection with the preferred embodiments mentioned above, it is possible to make various modifications or variations without departing from the spirit and scope of the invention. Accordingly, the scope of the appended claims will include such modifications or variations that fall within the gist of the present invention.

10: support frame 20: rotating drum
30: high magnetic force selection section 31: shaft
32: power supply means 33: magnet
33a: through hole 34: steel plate

Claims (5)

In the stainless steel sorting device for wood chips for sorting stainless steel from wood chips,
A support frame;
A rotating drum rotatably installed at one end of the support frame;
A high magnetic force selection part rotatably installed at the other end of the support frame;
It is formed to surround the rotating drum and the high magnetic force selection portion, and includes a belt member for moving the wood chip supplied to the upper surface in one direction when at least one of the rotating drum or the high magnetic force selection portion rotates,
The high magnetic force selection unit
A shaft on which both end portions are rotatably installed on one side of the support frame;
A plurality of magnets having a through-hole formed in the center and one side of the shaft being inserted into the through-hole to be coupled to the outer surface of the shaft, and coupled to the shaft with opposite poles facing each other;
It is interposed between the magnet and the magnet, and includes a steel plate in which a plurality of holes are formed along the outer circumferential direction in the inner region of the outer periphery.
Stainless steel sorting device for wood chips, characterized by generating a magnetic force of 12,000G (gauss) to 14,000G while rotating.
According to claim 1,
The steel plate is a stainless steel sorting device for wood chips, characterized in that a plurality of irregularities are formed on the outer surface.
delete According to claim 1,
The hole is a stainless steel sorting device for wood chips, characterized in that the horizontal width is formed relatively longer than the vertical width.
According to claim 1,
The steel plate is a stainless steel sorting device for wood chips, characterized in that a plurality of magnets are installed on one side of the outer surface of the shaft according to the number of installations of the magnet, and an area between the holes and the holes is shifted.

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