JPH084758B2 - Induction magnetic drum type magnetic separator - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a magnetic separator that separates and collects magnetic substances contained in a fluid such as a slurry, and more particularly to a drum type magnetic separator that uses induction magnetism.

(Prior Art) As a wet magnetic separator for separating and collecting magnetic substances in a slurry, there is a wet drum type magnetic separator. In this type of magnetic separator, a permanent magnet or electromagnet is arranged as a magnetic generator in a rotating drum, and the magnetic substance is adsorbed on the drum surface, and the magnetic substance is adsorbed on the drum surface to separate the magnetic substance. It was being collected.

(Problems to be Solved by the Invention) However, in the above-described conventional magnetic separator, the magnetic force for adsorbing the magnetic material has to rely only on the magnetic force generated by the permanent magnet or the electromagnet inside the drum. For this reason, the magnetic force on the drum surface is not always sufficient, and in particular, a magnetic gradient sufficient to adsorb the fine magnetic substance could not be obtained. Therefore, the range of use is also specified,
Coarse selection, that is, only a slurry that is particularly susceptible to magnetic separation could be magnetically selected.

The present invention has been made in view of the above, and its purpose is to:
It is to obtain an induction magnetic drum type magnetic separator capable of easily performing slurry magnetic separation having a wide range of properties.

(Means for Solving the Problems) An induction magnetic drum type magnetic separator according to the present invention is a processing container that stores a fluid containing a magnetic material, and a magnetic material that is rotatably provided inside the processing container. Drum, an internal magnet provided in a stationary state in the internal space of the drum regardless of the rotation of the drum, and an external magnet provided outside the container, and the internal magnet, the drum, and a part of the processing container are provided. An external magnet that forms a magnetic field space facing each other so as to sandwich it, and the drum are rotated to magnetize a portion of the drum that passes through the magnetic field space to magnetize the magnetic substance in the fluid from the fluid. And a rotation drive device for removing and recovering the magnetic substance from the portion while the portion is removed from the magnetic field space.

(Operation) An internal magnet is provided inside the drum for removing magnetic material in the processing container. An external magnet is provided outside the processing container. These magnets face each other to form a magnetic field space. As a result, regarding a certain portion of the drum, it is magnetized as it passes through the magnetic field space as it rotates. The magnetic material is adsorbed by the magnetized portion of the drum and carried along with the rotation, and is separated from the fluid. Then, the magnetized portion becomes non-magnetized when it comes out of the magnetic field space, from which the magnetic substance is separated and collected.

(Embodiment) FIG. 1 is a sectional view of an embodiment of the present invention.

2 and 3 show the matrix as a part thereof in detail. This device rotates a drum (drum assembly) in which a matrix is planted on the surface, and along with the rotation, those arranged in the circumferential direction of each matrix are sequentially and continuously magnetized, then demagnetized and magnetized. The magnetic substance is adsorbed by the above-mentioned matrix, and the magnetic substance adsorbed thereto is dropped and collected from the non-magnetized matrix.

First, the structure of the device of the present invention will be described. A nonmagnetic tank (processing vessel) 2 is fixed to a frame 1 as a stationary system. The tank 2 is provided with a supply port 2a for charging the slurry S, a concentrate discharge port 2b for discharging the treated slurry PS, and a magnetic substance discharge port 2c for discharging and recovering the magnetic substance M separated from the slurry. ing.

A drum assembly 4 is rotatably arranged around the fixed shaft 3 in the tank 2. That is, both ends of the fixed shaft 3 are fixed to the frame 1 by the blocks 5, and the drum assembly 4 is rotatably supported around the fixed shaft 3 by the bearings 6 at both ends. The drum assembly 4 is rotationally driven by the drive motor 7 in the direction of the arrow. The drum assembly 4 includes a drum (drum body) 4A and a large number of matrix units 4B, 4 fixed on the entire circumferential surface thereof.
Having B, ... As shown in FIG. 2, each matrix unit 4B includes a plurality of ferromagnetic matrices 4b, 4
b, ... are planted in one matrix base 4a. As shown in FIG. 3, the ferromagnetic material matrix 4b is
The matrix base 4a is implanted at an angle of θ, that is, in a state of being inclined in a direction opposite to the rotation direction of the drum assembly 4. This matrix unit 4B is a drum
It is fixed to the surface of 4A with screws 8.

In order to form a magnetic field space 9A that magnetizes the matrices 4b, 4b, ..., An inner magnet 9 and outer magnets 10a, 10b are provided in a facing state. The internal magnet 9 functions as a fixed pole and is fixed to the fixed shaft 3 inside the drum assembly 4. That is, the internal magnet 9 is provided so as to maintain a stationary state regardless of the rotation of the drum assembly 4. The external magnets 10a and 10b are connected to the drum assembly 4
And, it is opposed to the internal magnet 9 across the tank 2. The inner magnet 9 and the outer magnets 10a and 10b are arranged so that their different poles face each other. This internal magnet 9 and external magnet
A magnetic field space 9A sandwiched between them is constituted by 10a and 10b. The matrix 4b is magnetized only when passing through this space 9A as the drum assembly 4 rotates,
Before and after passing, it is non-magnetized. The inner magnet 9 has a substantially fan-shaped cross section, and is fixed to the fixed shaft with a gap that does not contact the inner wall of the drum 4A.

A cleaning nozzle 11 is provided in front of the magnetic field space 9A in the tank 2 in the rotation direction. This nozzle 11 is a matrix
It is for washing away the magnetic substance attached to 4b.

Next, the magnetization and non-magnetization of the matrix 4b in this device will be described in more detail. The drum assembly 4 is rotated in the direction of the arrow by the drive motor 7. The direction of rotation coincides with the direction of slurry flow in the container. With this rotation, each matrix 4b of the drum 4A passes through the magnetic field space 9A. Each matrix 4b is efficiently magnetized while passing through the magnetic field space 9A, and is non-magnetized when passing through the magnetic field space 9A. At this time, there is a very high magnetic gradient near the surface of 4b of each matrix.

The processing of the slurry by this device will be described. The slurry is charged from the ore feeding port 2a, and the drum assembly 4 is rotated. The slurry charged from the mine mouth 2a is stored in the tank 2
Flows along the bottom of the. Since the rotating direction of the drum assembly 4 and the flowing direction of the slurry are the same, the relative speed between the slurry and the matrix 4b is small. Therefore, the slurry penetrates the magnetized matrix 4b at a relatively slow speed. As a result, the magnetic substance in the slurry is efficiently adsorbed on the surface of the magnetized matrix 4b,
Carried with the rotation of 4A. In this way, the magnetic substance is removed from the slurry. The slurry from which the magnetic material has been removed is discharged from the concentrate discharge port 2b to the outside of the tank. Magnetic field space
The magnetic substance adsorbed to the matrix 4b in 9A falls from the matrix when it leaves the magnetic field space 9A. This drop is promoted by the cleaning water from the cleaning nozzle 11. As can be seen from FIG. 4, the direction of the drop is along the direction inclined rearward of the matrix 4b, and is guided to the magnetic substance discharge port 2c.

 According to the embodiment of the present invention, the following effects can be obtained.

(1) Since the internal magnet 9 and the external magnets 10a and 10b are adopted,
It is possible to make the magnetic field distribution in the magnetic separation region uniform.

(2) Since the matrix 4b made of a ferromagnetic material is adopted, a very high magnetic gradient can be easily obtained, and a larger attraction force than that of the conventional drum type magnetic separator can be obtained.

(3) Since the matrix unit 4b is attached to and detached from the drum 4A without the use of ore, the matrix 4b can be selected according to the slurry, and various kinds of slurries can be processed.

(4) Since the drum 4A is rotated in the direction in which the slurry flows, the relative speed between the slurry and the matrix 4b made of a ferromagnetic material can be reduced, and a magnetic separation condition comparable to that of an electromagnetic filter can be obtained. Is.

〔The invention's effect〕

According to the present invention, not only the internal magnets but also the external magnets are adopted, and the portions opposed to each other are set as the magnetic field space, and the drum is magnetized in this magnetic field space. Therefore, the drum can be magnetized effectively. Thus, the magnetic substance can be efficiently extracted and separated from the fluid.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of the magnetic separator of the present invention, FIG.
FIG. 3 is a diagram showing a state where the matrix is planted, and FIG. 4 is a diagram showing a falling state of the magnetic material. 1 ... Frame, 2 ... Tank made of non-magnetic material, 2a ... Ore supply port, 2b ... Concentrate discharge port, 2c ... Magnetic substance discharge port, 3 ...
Fixed shaft, 4 ... drum assembly, 4A ... drum, 4B ... matrix unit, 4a ... matrix base, 4b ... ferromagnetic material matrix, 5 ... block,
6 ... Bearing, 7 ... Drive motor, 8 ... Screw,
9 ... Internal magnet, 10a, 10b ... External magnet, 11 ... Washing nozzle.

Claims (5)

[Claims] 1. A processing container for accommodating a fluid containing a magnetic material, a drum for removing a magnetic material rotatably provided in the processing container, an internal space of the drum, for rotating the drum. An internal magnet that is provided so as to maintain a stationary state regardless of the above, and an internal magnet that is provided outside the container and that opposes the internal magnet via the drum and a part of the processing container. An external magnet that forms a magnetic field space between the drum and the drum is rotated, and a portion of the drum that passes through the magnetic field space is locally magnetized to rotate the magnetic substance in the fluid. The magnetic substance is removed from the fluid by being adsorbed to the magnetized part, and when the part escapes from the magnetic field space and returns to the non-magnetized state, the magnetic substance is separated from the part and recovered to the outside. Equipped with a drive Magnetic separator characterized by Rukoto. 2. The drum has a cylindrical drum main body and a plurality of substantially flat plate-shaped matrices attached to the drum main body, and each matrix is magnetized in the magnetic field space to contain the magnetic substance. Each of the plurality of matrices is attached at a position along each of a plurality of generatrixes at predetermined intervals in the circumferential direction on the outer peripheral surface of the drum body. The magnetic separator according to claim 1. 3. The magnetic separator according to claim 1, wherein the rotation driving device rotates the drum in the same direction as the flowing direction of the fluid containing the magnetic material in the container. 4. The magnetic separator according to claim 2, wherein the matrix is removably provided on the surface of the drum body. 5. Each of the substantially flat plate-shaped matrices is obliquely attached to the outer peripheral surface of the drum main body in a state in which the free front end portion is tilted in the direction opposite to the rotation direction of the drum relative to the fixed base end portion. The magnetic separator according to claim 2, wherein the magnetic separator is a magnetic separator.