JPS59242B2 - Jikibunriki - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates generally to magnetic separation techniques, and more particularly to apparatus useful for magnetically removing magnetically attractable components from solutions and slurries.

No. 19,169 (filed March 13, 1970), assigned to the assignee of the present applicant, describes a magnetic separator that overcomes many of the problems of the prior art.

Specifically, a magnetic separation device is disclosed that includes a non-magnetic metal container having an inlet and an outlet for flow of a process slurry therethrough.

The metal container contains a fibrous ferromagnetic material or the like as a collection matrix, and may be provided with partitioning means to impart a suitable pattern to the flow-through movement.

The metal container is surrounded by a suitable wire coil to provide a strong magnetic field in the vicinity of the collection matrix.

According to conventional magnetic technology, a solid ferromagnetic yoke surrounds both the metal container and the coil to form a low reluctance return path in a closed magnetic circuit connecting the container, the magnet, and the solid portion of the yoke. do.

Although the structure described above is particularly useful for applying a strong magnetic field to the magnet space of the metal container, the volume in which slurry treatment is actually performed is extremely limited compared to the total volume of the separator.

Although the magnetic field will be extremely strong within this narrow separation area, the total magnetic field (this term includes the return path of the magnetic circuit) will in practical terms extend far beyond the metal enclosure space, and most of the magnetic field established will be The return route passes through the yoke.

This return section does not perform an effective separation function.

SUMMARY OF THE INVENTION An object of the present invention is to provide a magnetic separator in which the magnet volume for separating magnetic substances from a solution or slurry is extremely large and includes almost all parts of the magnetic closed circuit that performs the separation function. .

Another object of the invention is to provide a suitable enclosure for a magnetic separation device, ideally configured to accommodate all of the magnetic field established by the associated coils and configured to efficiently flow through the processing solution or slurry. To provide a shape body.

Yet another object of the present invention is to provide a matrix arrangement comprising means for twisting the flow of slurry flowing therethrough and for concentrating the magnetic flux at numerous collection points in this channel to increase the efficiency of the collection action. The present invention provides a magnetic separation device with the following features.

Yet another object is to provide a magnetic separator in which the collection matrix and return path are indistinguishable from each other, thus providing a significantly increased effective volume for magnetic separation over conventional iron yoke return magnets.

The objects of the invention described above are achieved by a magnetic separation device having a closed magnetic space with an inlet and an outlet through which a solution and slurry of clay or similar material to be treated by separation action flows.

The electromagnetic means is arranged with respect to the closed space such that a magnetic closed circuit is established within the space, and all of the magnetic field lines defining the magnetic field are contained within the space.

In an embodiment of the invention, the hermetic intermediate is defined by a hollow toroid body, and the magnetic field source is obtained by a coil continuously wound around this toroid body.

A non-magnetic partition means is disposed transversely to the direction of flow through the toroid body, and an inlet and an outlet are positioned on opposite sides of the partition means.

In this way, a flow is formed around the entire toroid body.

The toroidal container is filled with a suitable porous ferromagnetic material, such as various forms of steel wool.

In order to correctly recognize the novel features of the present invention, first
DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring now to the figure, a prior art apparatus using a filled vessel for separating magnetic material from a clay slurry or similar slurry or solution is shown.

The container 10 of FIG. 1 is a closed hollow body defined by a wall 18 and provided with an inlet 12 and an outlet 14 through which a slurry or the like to be processed can flow through the container.

The container has a magnetic space 16 inside which is filled with porous ferromagnetic material 20, such as steel wool, stainless steel wool, porous ferrite, etc.

According to the principles of the prior art, for example according to the above-mentioned Ianninicelli application, as illustrated, the container is first surrounded by a coil 22 (which serves as the source of the magnetic field used for the separation); It is surrounded by a solid ferromagnetic yoke 24.

According to the well-known principles of electromagnetic testing, an electromagnetic field is created by passing an electric current through the coil 22. This creates a strong magnetic field within the axial extent of the coil, in particular within the magnet space 16.

The yoke 24 forms a return path and thus the porous ferromagnetic material 2
0 and both ends of the container and a portion of the yoke 24 surrounding both ends result in a complete magnetic closed circuit.

Such a closed circuit is indicated by magnetic field lines, designated by the reference numeral 26, representing the magnetic flux present within the device.

As shown in FIG. 1, the strongest magnetic field is established within the magnet space 16 by the above configuration, and the magnetic field is
Although it functions to efficiently separate magnetic impurities from the slurry or solution, the space actually available for processing the slurry is relatively limited.

In fact, the surrounding yoke usually forms a large part of the device and the processing area itself is correspondingly small.

The perspective view shown in FIG. 2 shows a specific example of a magnetic separator according to the invention.

The illustrated separator 41 includes a hollow toroid body 42 provided with partition means or baffles 44 across its body volume.

The inlet 46 and outlet 48 are each connected to the toroid body on opposite sides of the baffle 44 so that the solution or slurry enters through the inlet 46, travels around the toroid body, and exits the outlet 4.
By exiting from 8, the flow completely passes through the toroid body.

In this example, toroid body 42 may be formed by a shell of non-magnetic material, such as copper, stainless steel, plastic, or the like.

According to the invention, the toroid body has a winding 50 completely wrapped around it.

This winding acts as a magnetic field source.

The hollow toroid body 42 is filled with a porous ferromagnetic material 52, such as steel wool or porous ferrite.

Under such conditions, those skilled in the art will appreciate that when current is applied to winding 50, the magnetic field represented by field lines 54 is almost completely enclosed within the toroid body.

That is, the magnetic flux travels in a single closed circuit within the toroid body.

Of course, a small amount of magnetic flux leaks from the main magnetic field within the toroid due to return path reluctance, close winding spacing, and other factors.

However, such leakage is of no practical importance.

If it is considered that it is better to employ the above-mentioned leakage magnetic field for separation, this can be realized as shown in FIG. 3.

That is, in FIG. 3, the toroid body 42 and the coil 50 are surrounded by a larger concentric toroid body 60 made of non-magnetic material 62,
The inside of this outer toroid body 60 is filled with a porous ferromagnetic material 64 .

Of course, appropriate inlets, outlets and baffles as shown in FIG. 2 are also required in the outer toroid body.

In each of the device embodiments described above, either the slurry material flows through the toroid body 42 as shown, or the slurry is subjected to a magnetic field throughout its flow through the device 41.

Device 41 therefore has a significantly larger separation volume compared to conventional devices.

The embodiments of the present invention are as follows.

(1) the enclosed space is defined by a hollow container, the walls of the container are made of non-magnetic material, the container is entirely filled with porous ferromagnetic material, and the electromagnetic means for establishing the magnetic field are located within the container; 2. A magnetic separator according to claim 1, comprising a coil installed in a container and surrounded by a ferromagnetic material, and generating a magnetic field in a container by passing an electric current through the coil.

(2) The magnetic separator according to the above item 1, wherein the container has an inlet and an outlet at both ends thereof for allowing the slurry to flow through.

(3) The magnetic separator according to item 2, wherein the ferromagnetic material is selected from the group of materials consisting of steel wool and porous ferrite.

(4) the toroid body includes a transverse baffle and an inlet and an outlet respectively connected to the interior of the toroid body on each side of the baffles, such that the slurry enters the toroid body through the inlet, passes around the toroid body and exits the toroid body, thereby causing the toroid body to flow through the toroid body; A magnetic separator as claimed in the claims, with flow passing through the entire volume of the body.

(5) A magnetic separator according to claim 1, wherein the coil is enclosed within a second concentric toroid body filled with a ferromagnetic material.

[Brief explanation of drawings]

FIG. 1 is a diagrammatic cross-sectional view of a conventional magnetic separator based on the ferromagnetic filling volume, FIG. 2 is a perspective view showing an embodiment of the magnetic separator of the present invention based on a toroid structure, and FIG. The figure is a diagrammatic sectional view showing still another embodiment of a magnetic separator having a toroid structure. 20.52...Ferromagnetic material, 42...Troid body, 44...Baffle, 46...
- Inlet, 48... Outlet, 50... Coil.

Claims (1)

[Claims] 1. A magnetic separator for removing mixed magnetic substances from clay slurry, etc., which has an airtight space with an inlet and an outlet for the slurry, etc., and a space in which almost all the magnetic lines of force of the magnetic closed circuit are contained within the airtight space. The closed space comprises a hollow toroid filled with a ferromagnetic material, and the electromagnetic means is a toroidal coil wound around the toroid. A magnetic separator characterized in that the coil generates a magnetic field that circulates inside the toroid body when a current is passed through the coil.