WO2014026444A1

WO2014026444A1 - High-field-strength magnetic roller and magnetic separator

Info

Publication number: WO2014026444A1
Application number: PCT/CN2012/084649
Authority: WO
Inventors: 袁友烈; 丁磷青; 肖龙海
Original assignee: 连云港宝相机械有限公司
Priority date: 2012-08-14
Filing date: 2012-11-15
Publication date: 2014-02-20
Also published as: CN102773157B; CN102773157A

Abstract

A high-field-strength magnetic roller and a magnetic separator thereof. The magnetic roller comprises a magnetic barrel (2) and a magnetic coil (1). The magnetic coil (1) is installed on the magnetic barrel (2), and the magnetic coil (1) comprises a magnetic ring (101) and a magnetism reinforcing plate (102). The magnetic ring (101) is a ring form formed by a magnetic block (103), and the magnetism reinforcing plate (102) is sandwiched between adjacent magnetic rings (101). The magnetic block (103) is manufactured by a permanent magnet material, and the magnetism reinforcing plate (102) is manufactured by a magnetic conductive material. Magnetic field directions are opposite between adjacent magnetic rings (101), and an angle exists between the axial direction of the magnetic ring (101) and the axial direction of the magnetic barrel (2).

Description

High field strength magnetic roller and magnetic separator

The invention relates to a magnetic roller for a magnetic separator and a magnetic separator. Background technique

Magnetic separators are widely used in various fields of industry. The magnetic separator includes a magnetic roller, wherein the magnetic roller is a key device of the magnetic separator. The high field strength magnetic roller in the prior art is generally a flat ring magnetic roller, that is, the magnetic roller includes a magnetic ring and a magnetizing plate, wherein the magnetic ring of the magnetic roller is aligned with the axial direction of the magnetic roller or the magnetic ring surface It is perpendicular to the axial direction of the magnetic roller. The magnetizing plate is sandwiched between adjacent magnetic rings, and the magnetic fields of adjacent magnetic rings are opposite to each other. Since the magnetic fields of the adjacent magnetic rings are opposite in direction, a strong repulsive magnetic field is generated when combined, and the magnetic force repulsed to the inner ring is forced to push the outer ring through the magnetizing plate due to the magnetic shielding effect of the stainless steel sealing cylinder. The magnetization plate is made of a magnetic permeability material with high magnetic permeability, and guides the magnetic direction to the outer surface of the magnetic roller, so that the outer surface of the magnetic roller forms an N and S phase between the adjacent magnetic rings. The pole, and a plurality of N, S closed magnetic field loops are formed outside the magnetic roller. Under the premise of constant magnetic flux, the smaller the thickness of the magnetizing plate, the higher the magnetic field strength of the 1^ and S poles at the magnetizing plate. Under the existing technical conditions, the magnetic field strength of the N and S poles of the magnetizing plate can be achieved. Above 15000GS, it can be applied to magnetic separation of weak magnetic ore, such as magnetic separation of limonite and hematite. Since the magnetic ring surface is perpendicular to the axial direction of the magnetic roller, the magnetic field strength in the space around the magnetic roller is statically constant when the magnetic roller rotates, and the high field strength magnetic field region is limited to the N and S poles of the annular magnetizing plate. The high-field strong magnetic field has a small sweeping surface, and the field strength acting on the ore particles is fixed and does not have a magnetic field gradient. Summary of the invention

The problem to be solved by the present invention is

1. Increase the sweeping area of the high field magnetic roller and increase the magnetic separation efficiency.

2. Construct a magnetic field gradient of the high field magnetic roller to increase the magnetic separation efficiency.

In order to solve the above problems, the solution adopted by the present invention is as follows:

A high field strength magnetic roller comprises a magnetic cylinder and a magnetic ring, the magnetic ring is mounted on the magnetic cylinder, the magnetic ring comprises a magnetic ring and a magnetization plate; the magnetic ring is an annular body composed of a magnetic block; The plate is made of a magnetically permeable material and sandwiched between adjacent magnetic rings; the direction of the magnetic field between adjacent magnetic rings is opposite; the axial direction of the magnetic ring is at an angle to the axial direction of the magnetic cylinder.

The magnetic block may be made of a permanent magnet material or an electromagnetic block composed of an exciting helical coil and an iron yoke.

The technical effects of the present invention include: The axial direction of the magnetic ring has an angle with the axial direction of the magnetic cylinder, and the poles of the annular magnetizing plates N and S form a slope on the surface of the magnetic roller. When the magnetic roller rotates, the strong magnetic field of the N and S poles of the magnetizing plate can be scanned into the magnetic separator of the magnetic separator, thereby increasing the scanning area, and the magnetic field of the selected ore in the magnetic separator of the magnetic separator is constantly changing. The gradient magnetic field is formed, and even alternating polarity changes occur, and the selected ore particles generate electromagnetic induction, which produces magnetic stirring, thereby improving the beneficiation efficiency. The invention has simple structure and is easy to manufacture and convenient for maintenance under the existing process conditions. DRAWINGS

Figure 1 is a schematic view showing the structure of a magnetic roller of the present invention.

2 is a schematic structural view of a magnetic ring of the present invention. 101 is a magnetic ring, 102 is a magnetization plate, 103 is a magnetic block, 104 is a positioning hole on the magnetic block, Y is the axial direction of the magnetic cylinder or the magnetic roller, Z is the axial direction of the magnetic ring, and A is Y and The angle between Z.

Figure 3 is a schematic diagram of a high field strength magnetic roller under the prior art conditions.

Fig. 4 is a view showing the distribution of the magnetic field strength of the high field strength magnetic roller of the present invention in the axial direction of the magnetic cylinder. The solid curve is the magnetic field strength at the rotational position shown in the magnetic roller diagram, and the virtual curve is the magnetic field intensity distribution after the magnetic roller rotates at a certain angle.

Fig. 5 is a dimensional view showing the axial angle between the magnetic ring and the axial direction of the magnetic cylinder of the present invention. Wherein, 101 is a magnetic ring, 102 is a magnetizing plate, Y is an axial direction of the magnetic cylinder, Z is an axial direction of the magnetic ring, U is an axial vertical surface of the magnetic cylinder, V is a magnetic annular surface, and A is Y and The angle between Z, B is the angle between U and V, W is the thickness of the magnetization plate, H is the thickness of the magnetic ring, Y and U are vertical, Z and V are perpendicular, so the angle A is equal to the angle 8 . detailed description

The invention will be further described in detail below with reference to the accompanying drawings.

As shown in FIG. 1, a high field strength magnetic roller includes a magnetic ring 1 and a magnetic cylinder 2, and a magnetic ring 1 is mounted on the magnetic cylinder 2, and a flange 4 is disposed at both ends of the magnetic cylinder 2, and the magnetic body is The ring 1 is installed between the flanges 4 at both ends, and a wedge-shaped substrate 5 is disposed between the two ends of the magnetic ring 1 and the flange 4; the magnetic ring 1 includes a through hole, and the screw 6 is arranged in the through hole, the screw 6 ends are fixedly connected to the flanges 2 at both ends of the magnetic cylinder 2; thereby fixing the magnetic ring 1 to the magnetic cylinder 2. The magnetic cylinder 2 includes a rotating shaft 3. The structure of the magnetic ring 1 is as shown in FIG. 2, and includes a magnetic ring 101 and a magnetization plate 102. The magnetic ring 101 and the magnetization plate 102 are arranged along the axial direction of the magnetic cylinder, that is, the magnetization plate 102 is sandwiched between adjacent ones. The magnetic ring 101 or the magnetic ring 101 is sandwiched between adjacent magnetizing plates 102, and those skilled in the art can understand the same meaning. The number of the magnetic ring 101 and the magnetizing plate 102 is determined by the thickness of the magnetic ring 101 magnetizing plate 102 and the length of the magnetic roller. The magnetic ring 101 is composed of a magnetic block 103 including a positioning hole 104, and the number of magnetic ring magnetic blocks may be 4 pieces, 5 pieces, 6 pieces or 8 pieces, 10 blocks or the like. Magnetic block It may be a permanent magnet made of a permanent magnet material, or an electromagnet composed of a spiral excitation coil and an iron yoke. The magnetizing plate 102 includes a hole corresponding to the positioning hole 104 of the magnet block 103. The hole in the magnetizing plate 102 and the positioning hole on the magnet block 103 constitute a through hole in the magnetic ring 1. The screw can be installed in the through hole. The magnetic ring, the magnetizing plate, and the aforementioned manner of fixing the magnetic ring and the magnetic cylinder have other forms, and those skilled in the art understand that how to fix and install does not constitute a limitation of the claims of the present invention. The magnetic field direction of the magnetic ring 101 is along the axial direction Z of the magnetic ring, or the two magnetic poles of the magnetic ring 101 are respectively located on the upper ring surface and the lower ring surface of the magnetic ring 101, and the magnetic field directions between adjacent magnetic rings are opposite, or Said that the magnetic field polarity between adjacent magnetic rings is opposite. Z is the axial direction of the magnetic ring 101, and Y is the axial direction of the magnetic cylinder or the magnetic roller. Since the axial direction of the magnetic cylinder is the same as the axial direction of the magnetic roller, Y may indicate the axial direction of the magnetic cylinder, and may also indicate the axial direction of the magnetic roller. The angle between the Z and the Y is included, or the magnetic ring surface of the magnetic ring 101 is not perpendicular to the axial direction of the magnetic cylinder or the magnetic cylinder, so that the magnetization plate shows a diagonal line on the surface of the magnetic roller. .

The principle of high field strength magnetic field generation is shown in Figure 3. Figure 3 is a schematic diagram of the conventional high field strength magnetic field generation under the prior art conditions. As shown in FIG. 3, the magnetic ring 101 and the magnetization plate 102 are alternately arranged along the axial direction of the magnetic cylinder 2, wherein the magnetic field directions between adjacent magnetic rings are opposite, or the magnetic field polarity between adjacent magnetic rings. Relatively, it produces repulsive force. As shown in Fig. 3, the magnetic lines of repulsive force are guided to the outside of the magnetic roller along the magnetizing plate due to the magnetic separation of the magnetic cylinder and the magnetic permeability of the magnetizing plate. A magnetic pole is formed on the magnetization plate. The magnetic poles of adjacent magnetizing plates are different, and a closed loop of magnetic lines is formed between adjacent magnetizing plates. Under the premise of constant magnetic flux, the smaller the thickness of the magnetizing plate, the higher the magnetic field strength of the 1^ and S poles at the magnetizing plate, and the denser the magnetic lines. Under the existing technical conditions, the magnetic field strength of the N and S poles of the magnetizing plate can be more than 15000 GS.

The principle of high field strength magnetic field generation of the present invention is the same as in the prior art. As shown in Fig. 4, the magnetic ring face of the magnetic ring 101 is not perpendicular to the axial direction of the magnetic cylinder 2 or the magnetic cylinder. The directions of the magnetic fields between adjacent magnetic rings 101 are opposite such that magnetic poles are formed at the magnetization plate 102. And there is a high field strength at the magnetic pole of the magnetization plate, and the magnetic field intensity distribution of the space outside the magnetic roller is shown by the solid curve in the graph of Fig. 4. After the magnetic roller rotates at a certain angle, since the magnetic ring surface of the magnetic ring 101 is not perpendicular to the axial direction of the magnetic cylinder 2 or the magnetic cylinder, the magnetic field intensity distribution of the magnetic roller outer space is as shown by the dashed curve in the graph of FIG. . When the magnetic roller rotates 360 degrees, the strong magnetic field of the N and S poles of the magnetizing plate can sweep through all the outer space of the magnetic roller, thereby increasing the scanning area. Moreover, as the selected ore particles rotate with the magnetic roller, the magnetic field is constantly changed, and even the polarity changes alternately. The selected ore particles generate electromagnetic induction, which produces magnetic stirring, thereby improving the beneficiation efficiency.

In order to realize that when the magnetic roller rotates 360 degrees, the strong magnetic field of the magnetizing plates N and S can sweep through all the outer space of the magnetic roller, and the angle between Z and Y needs to meet certain conditions. After the magnetic roller rotates 360 degrees, the conversion of the NSN or SNS magnetic pole is completed. As shown in FIG. 5, the angle between the axial direction Z of the magnetic ring 101 and the axial direction Y of the magnetic cylinder is equal to the vertical plane of the magnetic cylinder. The angle B between U and the magnetic ring surface V. The angle B meets:

. W + H _D . (W + Η λ

Sin 15 ) = , or B = arcsin

' D I D ) wherein W is the thickness of the magnetization plate 102, H is the thickness of the magnetic ring 101, and D is the diameter of the magnetic roller.

That is, the angle A between the axial direction Z of the magnetic ring 101 and the axial direction Y of the magnetic cylinder satisfies:

, [W + Η λ

A = arcsin

DJ Since the thickness W of the magnetizing plate is small, W in the above formula can be ignored. Then the above formula becomes:

If the thickness of the magnetic ring is 12 cm, when the diameter of the magnetic roller is 100 cm, the appropriate angle of the angle A is about 7 degrees.

If the thickness of the magnetic ring is 12 cm, when the diameter of the magnetic roller is 70 cm, the appropriate angle of the angle A is about 10 degrees.

Due to manufacturing reasons, the angle A cannot be too large, typically 7-10°.

The magnetic roller is a key device of the magnetic separator. The invention protects the axial angle between the magnetic ring of the magnetic roller and the axial direction of the magnetic cylinder. Therefore, the magnetic roller of the magnetic separator meets the above conditions. It belongs to the scope of protection of the present invention. Those skilled in the art will appreciate that the assembly of other components of the magnetic separator does not constitute a limitation of the claims of the present invention.

Claims

The invention provides a high field strength magnetic roller, comprising a magnetic cylinder and a magnetic ring, wherein the magnetic ring is mounted on the magnetic cylinder, the magnetic ring comprises a magnetic ring and a magnetization plate; and the magnetic ring is a ring composed of a magnetic block. The magnetizing plate is made of a magnetically permeable material and sandwiched between adjacent magnetic rings; the direction of the magnetic field between adjacent magnetic rings is opposite; characterized in that: the axial direction of the magnetic ring and the magnetic cylinder There is an angle in the axial direction. The high field strength magnetic roller according to claim 1, wherein an axial direction of said magnetic ring is 7 to 10 degrees from an axial direction of said magnetic cylinder.

A high field strength magnetic roller according to claim 1, wherein said magnetic block is made of a permanent magnet material.

The high field strength magnetic roller according to claim 1, wherein the magnetic block comprises a positioning hole, and the magnetization plate comprises a positioning hole, a positioning hole of the magnetic block and a positioning of the magnetization plate. The hole is formed with a through hole along the axial direction of the magnetic cylinder, and a screw is arranged in the through hole, and both ends of the screw are fixed at both ends of the magnetic cylinder.

A high field strength magnetic separator characterized by comprising the high field strength magnetic roller of claim 1.

A high field strength magnetic separator characterized by comprising the high field strength magnetic roller of claim 2.

A high field strength magnetic separator characterized by comprising the high field strength magnetic roller of claim 3.

A high field strength magnetic separator characterized by comprising the high field strength magnetic roller of claim 4.