JPH04161258A - Magnetic separator - Google Patents

Abstract

PURPOSE:To enhance magnetic separation efficiency and to reduce power consumption by arranging parmanent magnets to the inside half of a rotary cylindrical body in parallel to the axial direction thereof so that N-poles and S-poles are alternately arranged in the circumferential direction and setting the surface magnetic flux density of the cylindrical body to a specific value or more. CONSTITUTION:Permanent magnets 15 are arranged to the inside half of a rotary cylindrical body 20 and separate the raw material falling from the upper part into a magnetic component and a non-magnetic component. The permanent magnates 15 are arranged in parallel to the direction of a shaft 11 so that N-poles and S-poles become alternate in the circumferfential direction and the surface magnetic flux density of the cylindrical body 20 is set to 300 gauss or more. As a result, a magnetic separator improved in magnetic separation efficiency, reduced in power consumption and having a simple structure can be obtained.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention places a permanent magnet in the inner half of a cylindrical body (also called a drum), and separates the raw material falling from the top into magnetized bones and magnetized parts. Concerning magnetic separator for separation.

[Conventional technology]

Conventional magnetic separators using permanent magnets have semicircular magnetic poles placed inside a rotating cylindrical body at predetermined intervals in the axial direction so that adjacent magnetic poles have different polarities, and the raw material falling from the top is The magnetized part of the cylinder was attracted to the cylinder and sent to the opposite side, and the magnetized part slid on the cylinder and fell to the bottom, separating the magnetized bone and the magnetized part. .

[Problem to be solved by the invention]

However, in conventional magnetic separators using permanent magnets, the magnetic flux density on the surface of the cylinder is as low as 800 to 1900 Gauss, and furthermore, the magnetic poles are arranged alternately in the axial direction, so the surface of the cylinder However, a problem arises in that slightly weaker parts of the magnetic poles occur at regular intervals, and raw materials passing through these parts cannot be adequately sorted.

In particular, when crushing cathode ray tubes and recycling them as raw materials,
It is necessary to sort and remove the anode buttons wrapped in glass, but it is extremely difficult to separate them sufficiently using a conventional magnetic separator.
Although it is theoretically possible to obtain a high magnetic flux density by using l, there are problems in that it requires electric power and the structure becomes complicated.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a magnetic separator that has good magnetic separator efficiency, consumes little power, and has a simple structure.

[Means to solve the problem]

A magnetic separator according to the present invention in accordance with the above object is a magnetic separator in which a permanent magnet is arranged in the inner half of a rotating cylindrical body, and the raw material falling from the upper part is separated into magnetized bones and magnetized parts. are arranged parallel to the axial direction and with north and south poles alternating in the circumferential direction, and the surface magnetic flux density of the cylinder is 35
00 Gauss or more.

[Effect]

In the magnetic separator according to the present invention, the permanent magnets are arranged parallel to the axial direction and with north and south poles alternating in the circumferential direction, so there are strong and weak magnetic flux areas in the circumferential direction. However, since the raw material passing over the cylinder always passes through areas with strong magnetic flux, it is possible to separate the magnetized bones from the magnetized parts.

The magnets are selected so that the surface magnetic flux density of the cylindrical body is 3,500 Gauss or higher, so conventional permanent magnets can be used, for example, from crushed cathode ray tubes to anode buttons with glass around them. It can even sort things that cannot be sorted with magnetic separators.

〔Example〕

Next, embodiments embodying the present invention will be described with reference to the attached drawings to provide an understanding of the present invention.

Here, FIG. 1 is a longitudinal cross-sectional view of the main components of an M1 separator according to an embodiment of the present invention, FIG. 2 is a cross-sectional view of the same, and FIG. 3 is a schematic side view of the magnetic separator.

As shown in FIGS. 1 to 3, a selection 1110 according to an embodiment of the present invention has a central fixed shaft 11 and a magnet attached to the fixed shaft 11 via a support plate 12.13. Board 1
4, the magnet mounting includes a plurality of permanent magnets 15 fixed to the plate 14, bearings 16 and 17 to the fixed shaft 11, and a side plate 18.
．． A cylindrical body 20 is rotatably attached via 19.
and a sprocket 2 attached to an example of the cylindrical body 20.
1. These will be explained in detail below.

The fixed shaft 11 is supported on both sides by fixed bearings 22, 23, and is supported in a fixed state such that the permanent magnet 15 is disposed from the upper part to the lower part, as shown in FIG. An angle adjustment device (not shown) is attached to the fixed shaft 11 to adjust the angle of the permanent magnet 15.

A bearing 24, 25 is provided inside the fixed shaft 11 in the middle part.
A bearing 16.17 is provided, the bearing 16.17 comprising:
A side plate 18, 19 is attached to each side plate 18, 19.
．． 19 are connected to form a cylindrical body 20. This cylindrical body 20 is made of a non-magnetic material such as stainless steel, and has a small gap with the internal permanent magnet 15.
is fixed, but the cylindrical body 20 can freely rotate.

The permanent magnet 15 is made of a strong magnet containing rare earth elements, and the magnetic flux density near the surface of the cylindrical body 20 is 35.
00 to 6,000 Gauss and of appropriate length are installed in series and parallel in the axial direction, and the N and S poles of magnetic poles adjacent in the circumferential direction alternate in the radial direction (i.e., in the direction of the cylinder). ).

Cylindrical covers 26 and 27 are attached to the sides of the side plates 18 and 19, and a sprocket 21 is attached to one of the cylindrical covers 26 so as to be rotationally driven by a motor, which is an example of a rotational drive source (not shown). It has become.

Therefore, FIG. 3 shows the overall configuration of the i11 sorting machine 10. In the figure, 10a is an outer case, 28 is an inspection window, 29 is a feeding point adjustment device, 30 is a feeding hopper, and 31 indicates a divider. Therefore, the raw material supplied from the hopper 30 moves along the cylindrical body rotating clockwise, but the magnetized bone 32 is moved by the permanent magnet 1 disposed inside.
5 and moves downward while adhering to the cylindrical body 20, but the magnetized bone 32 and the magnetized component 33 fall as they are, so that the magnetized bone 32 and the magnetized component 33 can be separated from the raw material.

In particular, in the magnetic separator 8110, the magnetic flux density on the surface of the cylindrical body 20 is 3500 Gauss or more, and the internal permanent magnet 15 is installed parallel to the axial direction.
The raw material is necessarily exposed to a strong magnetic field, and this makes it possible to separate the anode buttons of cathode ray tubes, etc., which were difficult to separate in the past. In this way, the permanent magnets placed inside the cylinder are made of strong magnets, and the magnetic flux density on the surface of the cylinder is 3500 Gauss or more, and each permanent magnet is placed parallel to the axial direction. Because of this, it is now possible to separate raw materials that were previously difficult to separate by magnetization.

Therefore, it has become possible to provide a magnetic separator that consumes little power and has a simple structure, instead of an electromagnetic type.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of the main components of a magnetic separator according to an embodiment of the present invention, FIG. 2 is a cross-sectional view of the same, and FIG. 3 is a schematic side view of the magnetic separator. [Explanation of symbols] 10-------- M1 selection machine, l 1--------
Fixed shaft, 12.13-----1 support plate, 14----1-
---Magnet mounting is on a plate, 15-------1 permanent magnet, 1
6, l 7----Bearing, 18, l 9-------One side plate, 20--------1 Cylindrical body, 21-Sprocket, 22.23--1---- Fixed bearing, 24.2
5----Bearing, 26.27---- Cylindrical cover, 2 El----Inspection window, 29-----
Supply point adjustment device, 30----- Homper, 3
1-------Divider-132----Magnetic bone, 33
−−−−1 Non-magnetic bone

Claims (1)

[Claims] In a magnetic separator that places a permanent magnet in the inner half of a rotating cylindrical body and separates the raw material that falls from the top into magnetized and non-magnetized components, the permanent magnet is parallel to the axial direction and has an N pole in the circumferential direction. A magnetic separator characterized in that the cylindrical body is arranged so that the and S poles are alternately arranged, and the surface magnetic flux density of the cylindrical body is 3500 Gauss or more.