WO2011070682A1

WO2011070682A1 - Magnetic separation apparatus

Info

Publication number: WO2011070682A1
Application number: PCT/JP2009/070779
Authority: WO
Inventors: 隆浩古田
Original assignee: 日本磁力選鉱株式会社
Priority date: 2009-12-11
Filing date: 2009-12-11
Publication date: 2011-06-16
Also published as: KR20110095855A; JPWO2011070682A1; JP5503637B2; KR101231644B1

Abstract

Disclosed is a magnetic separation apparatus comprising a vertical and annular perforated rotating container consisting of a nonmagnetic material and having the internal space sectioned into a plurality of partitioned chambers, a magnetic medium housed in each divided chamber to move freely and gravitationally, rotary drive means for rotating the perforated rotating container about the horizontal axis of rotation, a magnet which generates an effective magnetic field, a material liquid supply means for supplying material liquid to each divided chamber which reached the effective magnetic field, and a cleaning means in ineffective magnetic field for cleaning off magnetic matters adhering to the surface of the magnetic medium in the divided chamber by supplying each divided chamber which reached the ineffective magnetic field from the effective magnetic field with cleaning medium, wherein cleanability of the magnetic medium to which magnetic matters are adhering is improved and collectability of magnetic matters from the material liquid is also improved.

Description

Magnetic separation device

The present invention relates to a magnetic separation device, and more particularly to a magnetic separation device that removes magnetic substances from a raw material liquid such as rolling oil or ore slurry containing iron powder or iron oxide powder using a magnetized magnetic medium.

As a device for removing magnetic substances from a raw material liquid, for example, a magnetic separation device disclosed in Patent Document 1 is known. The apparatus of Patent Document 1 has a cylindrical separator container as a main body, a magnet for generating a magnetic field in a part of the separator container is provided outside the separator container, and a horizontal plane around a vertical rotation axis. The main configuration is that an annular magnetic filter that can rotate inside is accommodated in a separator container, and a rotation driving means is provided in the magnetic filter. The magnetic filter has a large number of filaments made of a magnetic material. When the magnetic filter continuously passes through the effective magnetic field of the magnet, the magnetic filter magnetizes the magnetic substance (magnetic material) in the raw water (raw material liquid) passed through the effective magnetic field. To wear.

During operation, the raw water is passed through the effective magnetic field from the raw water inflow section provided in the separator vessel so that the flow direction of the raw water in the effective magnetic field is the rotation direction of the magnetic filter, and is discharged from the effective magnetic field. The treated water is discharged from the treated water discharge section provided in the separator container. After that, backwash water flows into the ineffective magnetic field from the backwash water inflow portion provided in the separator container, and the magnetic substance magnetized on the magnetic filter is removed, and the removed magnetic substance is put into the separator container. It discharges from the backwash water discharge part provided. Accordingly, the magnetic filter can be regenerated while continuously processing the raw water containing the magnetic substance with the magnetic filter. As a result, the amount of raw water purification can be increased, and the device can be simplified and made compact.

Japanese Unexamined Patent Publication No. 11-114326

However, when the magnetic separation apparatus described in Patent Document 1 is operated, if attention is paid to the magnetic substance in the raw water, the magnetic substance is magnetically attached to the magnetic filter with an effective magnetic field, and then the ineffective magnetic field is generated by the horizontal rotation of the magnetic filter. And then backwashed and discharged out of the apparatus. At this time, the magnetic substance adheres to the surface of each filament in the magnetic filter. Therefore, for example, it is difficult to remove the magnetic substance adhering to the filament (in the center) of the magnetic filter only by passing backwash water from one direction to the magnetic filter rotating in one direction. . As a result, the removal rate of the magnetic substance from the raw water was reduced.

Therefore, as a result of earnest research, the inventor, instead of the magnetic filter, the inner space is divided into a number of divided chambers in the circumferential direction and is made of a nonmagnetic material that can rotate around a horizontal rotation axis. It has been found that the above-mentioned problems can be solved by adopting an annular porous rotating container and movably storing a magnetic medium in each divided chamber, and the present invention has been completed. That is, the porous rotating container is rotated in the vertical plane around the rotation axis, and the magnetic medium in the divided chamber that has reached the effective magnetic field of the magnet is sequentially magnetized, and the magnetism in the raw material liquid supplied in the effective magnetic field is here. An object is magnetically attached to the surface of the magnetic medium. After that, the dividing chamber moves from the effective magnetic field to the ineffective magnetic field, and the magnetic material on the surface of the magnetic medium which has been demagnetized is cleaned and recovered, thereby improving the cleaning performance of the magnetic medium to which the magnetic material is attached. In addition, it has been found that the recoverability of the magnetic substance from the raw material liquid can be improved.

An object of the present invention is to provide a magnetic separation device that can improve the cleaning performance of a magnetic medium to which a magnetic material is adhered, and can also improve the recoverability of the magnetic material from the raw material liquid. .

According to the first aspect of the present invention, the inner space is partitioned into a plurality of divided chambers in the circumferential direction by a partition plate made of a non-magnetic material, and the center axis is horizontal or inclined and is a porous material made of a non-magnetic material. A rotary container, a magnetic medium accommodated in each of the divided chambers so as to be freely moved by its own weight, and a rotary axis disposed on the central axis line, the porous rotating container being placed in a vertical plane. A rotation driving means for rotating in an inner or inclined plane, a magnet that is arranged outside a part of the porous rotating container, and that generates an effective magnetic field that sequentially passes through each of the divided chambers as the porous rotating container rotates, Raw material liquid supply means for supplying a raw material liquid containing a magnetic material to each divided chamber that has reached the effective magnetic field, and each divided chamber that has passed the effective magnetic field and has reached an ineffective magnetic field that does not reach the magnetic force of the magnet. Supply cleaning media In a magnetic separation apparatus comprising a disabling field in the cleaning means for separating the washed magnetic substance attached to the surface of the invalid field to reach the portioning chambers of a magnetic medium.

According to the first aspect of the present invention, each of the magnets having reached the effective magnetic field of the magnet is obtained by rotating the porous rotating container in the vertical plane or the inclined plane around the rotation axis that is horizontal or inclined by the rotation driving means. The magnetic medium in the divided chamber is magnetized. At this time, the effective magnetic field is supplied with the raw material liquid containing the magnetic substance from the raw material liquid supply means through the hole of the porous rotating container. Thereby, in the divided chamber in the effective magnetic field, the magnetic substance is magnetically attached to the surface of the magnetic medium, while the processing liquid is discharged to the outside through another hole of the porous rotating container.
Thereafter, by continuing the rotation of the porous rotating container, the division chamber in the effective magnetic field moves to the invalid magnetic field, and the magnetization of the magnetic medium in the division chamber is released. Along with this, each magnetic medium rolls while continuously falling in each divided chamber. In this rolling state, the cleaning medium is supplied to each of the divided chambers that have reached the invalid magnetic field by the ineffective magnetic field cleaning means, and the magnetic material attached to the magnetic medium in the divided chamber is washed away. As a result, it is possible to improve the cleaning properties of the magnetic medium to which the magnetic material is adhered, and accordingly, it is possible to improve the recoverability of the magnetic material from the raw material liquid. Thereafter, the rotation of the porous rotating container further proceeds, so that the divided chamber containing the washed magnetic medium moves again to the effective magnetic field. These operations are repeated while the rotation of the porous rotating container is continued by the rotation driving means.

A magnetic separation device is a device that uses magnetism (magnetic field) to separate a raw material liquid containing a magnetic substance into a magnetic substance and a treatment liquid that is a liquid remaining after separating the magnetic substance from the raw material liquid. .
Examples of the raw material liquid include water, granular mineral slurry (mineral slurry), oil emulsified water (rolled oil), water containing sodium hydroxide, oil (including waste oil from metalworking machines), etc. Can be adopted.
Examples of the magnetic material include chips discharged from a metal processing machine, rolling oil, and powder (including wear powder) in silica sand slurry. As the material of the magnetic material, for example, iron, nickel, cobalt, and alloys or compounds thereof, or magnetic minerals such as chromite, ilmenite, and spinel can be employed.

Examples of the cleaning medium include water (cold water, hot water), petroleum-based cleaning oils such as second petroleums and third petroleums, organic solvents such as alcohol, alkaline solutions (such as aqueous caustic soda), compressed air, inert gas, or A mixed liquid of at least one of these and hot water may be used. Of these, if the surface of the magnetic medium is washed with an organic solvent washing medium, the organic solvent dissolves the oil adhering to the surface of the magnetic medium. Therefore, the removal rate of the magnetic substance adhering to the surface of the magnetic medium is increased.
The cleaning medium may be blown into the dividing chamber together with compressed air or an inert gas. As a result, the cleaning liquid uniformly penetrates all exposed surfaces of the magnetic medium stored in the division chamber, and the cleaning effect of the magnetic medium is further enhanced. The pressure of compressed air is preferably 0.5 kg / cm ² or more.
The cleaned cleaning medium may be reused if the liquid is extracted after separating the mixed magnetic substances.

The material of the partition plate is arbitrary as long as it is a non-magnetic material. For example, various non-magnetic metals (such as austenitic stainless steel and titanium alloy), various synthetic resins (such as vinyl chloride and fiber reinforced plastic (FRP)), and ceramics can be used. The number of partition plates used is 4 or 5 or more. As the number of partition plates is increased, the multi-hole rotating container is divided into more divided chambers. The positions of the partition plates in the circumferential direction of the porous rotating container may be arranged at a predetermined pitch or may be unevenly spaced. However, it is preferable that the partition plates are arranged at uniform intervals in the circumferential direction of the porous rotating container. The partition plate is not formed with a hole through which the raw material liquid or the like passes. Moreover, it is preferable that the length direction of the partition plate is aligned with the radial direction around the central axis of the porous rotating container.
The number of division chambers formed is determined by the number of partition plates used. Further, the size of the dividing chamber is also appropriately determined depending on the interval between the adjacent partition plates.
As the material of the porous rotating container, various nonmagnetic materials exemplified as the material of the partition plate can be adopted.

The shape of the porous rotating container is arbitrary as long as it has an annular shape. Specifically, it may be not only a perfect circular donut shape (hollow annular shape) when viewed from the front, but may also be a triangular or quadrangular or more polygonal hollow donut shape when viewed from the front.
The inclination angle when the “annular center line is inclined” is greater than 0 ° and less than or equal to 45 ° with respect to the horizontal line. The inclination angle here refers to the inclination angle when the annular center line has one end side directed downward (the other end side is directed upward) and the inclination angle when one end side is directed upward. And both. When the tilt angle is 0 °, the porous rotating container is not tilted. Further, if it exceeds 45 °, the raw material liquid supplied from the raw material liquid supply means to each of the dividing chambers tends to overflow from the opening on the supply side of each separation chamber. A preferable inclination angle of the center line is larger than 0 ° and not larger than 20 °. If it is within this range, among the many magnetized media stored in the separation chamber, the number of magnetized media (surface area on the supply side of the magnetic media group) arranged on the supply side surface increases. The amount of magnetic adhesion of the magnetic material in the raw material liquid increases.
The rotation speed of the porous rotating container is 0.1 to 30 rpm. If it is less than 0.1 rpm, the amount of magnetic material attached to the magnetic medium within the effective magnetic field per rotation of the porous rotating container increases, and it becomes difficult to clean the surface of the magnetic medium within the ineffective magnetic field. Moreover, if it exceeds 30 rpm, a porous rotating container will be high-speed rotation, and a raw material liquid will hit a partition plate and will be easily scattered outside. A preferable rotation speed of the porous rotating container is 0.3 to 2 rpm. Within this range, the raw material liquid is not scattered, and the magnetic deposit adhered to the surface of the magnetic medium can be sufficiently cleaned during cleaning in a non-cleaning magnetic field.

“Movement due to its own weight in the division chamber” means that the magnetic medium in the division chamber rolls and moves (rolls) under its own weight as the porous rotating container rotates.
The magnetic medium is magnetized by a magnet in an effective magnetic field and magnetically adheres a magnetic substance in the raw material liquid supplied from the raw material liquid supply means to the effective magnetic field.
As the material of the magnetic medium, for example, iron, nickel, cobalt, and alloys thereof exemplified as the material of the magnetic material can be employed. As the magnetic medium, a metal ball (iron ball), a metal rod (rebar), or the like can be employed. In addition, a magnetic metal wire or the like formed into a substantially spherical shape may be used.
The number of magnetic media used may be one or two or more. When there are a plurality of magnetic media, the size of each magnetic medium may be the same or different.

The filling rate of the magnetic medium into the dividing chamber is 50 to 90%. If it is less than 50%, the amount of magnetic adhesion (magnetic adherence) in the division chamber of the magnetic material is lowered, and the recovery rate of the magnetic material is lowered. If it exceeds 90%, the magnetic substance hardly rolls in the division chamber. A preferable filling rate of the magnetic medium into the dividing chamber is 70 to 80%. Within this range, a high recovery rate of the magnetic material can be obtained while the magnetic medium rolls smoothly in the dividing chamber.
As the rotational drive means, for example, various prime movers such as an electric motor and a hydraulic motor can be employed.
The “outside part of the porous rotating container” means, for example, not the inside of the part of the porous rotating container but the outside (near) of this part.
As the magnet, for example, a permanent magnet such as a ferrite magnet or a rare earth magnet, an electromagnet (including a superconducting magnet), or the like can be employed.

The effective magnetic field refers to a region affected by the magnetic field of the magnet. The ineffective magnetic field refers to a region that is not affected by the magnetic field of the magnet.
“The divided chambers sequentially pass with the rotation of the porous rotating container” means that the rotating rotating means rotates the porous rotating container so that each of the divided chambers in the porous rotating container sequentially reaches an effective magnetic field. Too much effective magnetic field.
As the raw material liquid supply means, for example, a raw material liquid pumping machine, a stirring tank for supplying the raw material liquid by overflow, and the like can be adopted.
As the ineffective magnetic field cleaning means, a spray device for spraying the cleaning medium from the nozzle, or a cleaning tank (container) for pouring the cleaning medium can be employed.

In the invention according to claim 2, the porous rotating container has a porous member disposed on at least the inner peripheral surface and the outer peripheral surface of the inner peripheral surface, the outer peripheral surface, and the side surfaces thereof. The magnet is disposed outside the upper part of the porous rotating container, the effective magnetic field is generated at the upper part of the porous rotating container, and the raw material liquid is supplied to the dividing chamber through the holes of the porous member on the outer peripheral surface side. 2. The magnetic separation device according to claim 1, wherein after being supplied, the magnetic separation device passes through each hole of the porous member on the inner peripheral surface side and is discharged out of the device.

According to the second aspect of the present invention, when each of the divided chambers reaches the effective magnetic field in the upper part of the porous rotating container sequentially, the magnetic medium in the divided chamber is magnetized. Moreover, the raw material liquid is supplied from the raw material liquid supply means to the dividing chamber in the effective magnetic field through each hole of the porous member on the outer peripheral surface side, and the magnetic substance in the raw material liquid is magnetized on the surface of the magnetic medium. On the other hand, the treatment liquid from which the magnetic material has been removed is at the center of the porous rotating container through the holes of at least the inner peripheral surface side porous member of the inner peripheral surface side and the side surface side in the upper part of the porous rotating container. It is discharged into the space. In this way, since the raw material liquid is supplied to each divided chamber through the outer peripheral surface of the porous rotating container having a larger surface area than the inner peripheral surface of the porous rotating container at the upper part of the porous rotating container, the raw material liquid from the inner peripheral surface side is supplied. As compared with the supply of the magnetic material, the amount of magnetic adhesion of the magnetic material increases, and the magnetic separation efficiency can be increased. This is because when the liquid containing the magnetic material is supplied to the magnetic medium group housed in the container, the amount of magnetic adhesion of the magnetic material increases in the upstream region compared to the downstream region of the magnetic medium group. In addition, each of the divided chambers has a funnel shape in which the discharge side (inner peripheral surface side) is narrower than the supply side (outer peripheral surface side) of the raw material liquid in this way. easy. Therefore, the magnetic material is easily magnetically attached to the surface of the magnetic medium.

Among the porous rotating containers, the surface composed of a porous member capable of passing a raw material liquid or the like is either two types of surfaces, an inner peripheral surface and an outer peripheral surface, or an inner peripheral surface, an outer peripheral surface, and a side surface. There are three types of surfaces. The side surface referred to here may be both side surfaces (end surfaces) or only one side surface. The other surface of the porous rotating container is not constituted by a porous member.
The material and shape of the porous member are arbitrary as long as a gap (hole) through which the magnetic medium does not pass is formed. For example, a rooster, a metal mesh, various perforated plates (expanded metal, punching metal, etc.) made of various metals can be employed.
The porous member on the outer peripheral surface side and the porous member on the inner peripheral surface side may be the same member or different members.

According to a third aspect of the present invention, in the porous rotating container, a porous member is disposed on at least the inner peripheral surface and the outer peripheral surface of the inner peripheral surface, the outer peripheral surface, and the side surfaces thereof, and the magnet Is arranged outside the lower part of the porous rotating container, the effective magnetic field is generated in the lower part of the porous rotating container, and the raw material liquid is supplied to the dividing chamber through the holes of the porous member on the inner peripheral surface side. 2. The magnetic separation device according to claim 1, after being discharged through the holes of the porous member on the outer peripheral surface side and discharged outside the device.

According to the third aspect of the present invention, when each of the divided chambers reaches the effective magnetic field in the lower part of the porous rotating container sequentially, the magnetic medium in the divided chamber is magnetized. Moreover, the raw material liquid is supplied from the raw material liquid supply means to the effective magnetic field dividing chamber through each hole of the porous member on the inner peripheral surface side. Thus, the magnetic material in the raw material liquid is magnetically attached to the surface of the magnetic medium, while the treatment liquid from which the magnetic material has been removed is at least of the outer peripheral surface side and the side surface side in the lower part of the porous rotating container. It is discharged to the lower space of the porous rotating container through each hole of the porous member on the outer peripheral surface side. As a result, it is not necessary to provide a raw material liquid supply means that is easily increased in size above the porous rotating container as in the case of the invention of claim 2, so that the magnetic separation device can be made compact. Moreover, even when a raw material liquid having a higher viscosity than water is employed, it is possible to prevent the time required for the raw material liquid to pass through the dividing chamber due to the decrease in fluidity due to the high viscosity. This is because the raw material liquid is supplied to the respective division chambers at the lower part of the multi-hole rotating container, so that after the raw material liquid passes through the upstream region of the magnetic medium group, the volume is larger than the upstream region and the liquid dispersibility is increased. This is because the raw material liquid is discharged outside through the region.

According to a fourth aspect of the present invention, in the effective magnetic field, the cleaning medium for washing away the liquid component adhering to the surface of the magnetic medium is supplied to a downstream portion of the effective magnetic field from the supply position of the raw material liquid. The magnetic separation device according to any one of claims 1 to 3, further comprising a cleaning unit.

According to the invention described in claim 4, by supplying the cleaning medium from the effective magnetic field cleaning means to the downstream portion of the effective magnetic field from the supply position of the raw material liquid, the raw material liquid adhered to the surface of the magnetic medium is supplied. Wash away only the liquid (treatment liquid). That is, the magnetic material magnetized on the surface of the magnetic medium is not washed away. As described above, since the magnetic medium is cleaned in the effective magnetic field, the recovery rate of the treatment liquid can be increased.

“A portion of the effective magnetic field downstream from the supply position of the raw material liquid” means that the effective magnetic field is supplied with the raw material liquid from the raw material liquid supply means, but is divided from the supply position with the rotation of the porous rotating container. The area portion of the effective magnetic field in the direction in which the chamber travels.
As the effective magnetic field cleaning means, for example, the same effective magnetic field cleaning means can be employed.

The invention according to claim 5 is the magnetic separation according to claim 1, wherein the cleaning medium is at least one of water, an aqueous alkali solution, surface-active water, water vapor, volatile oil, compressed air, and inert gas. Device.

The cleaning medium may be, for example, any one of water, alkaline aqueous solution, surface active water, water vapor, volatile oil, compressed air, inert gas, or any two or more selected from this group. .
As the aqueous alkali solution, for example, an aqueous caustic soda solution can be employed.
As the surface active water, for example, a synthetic detergent such as alkylbenzene sulfonate dissolved in water can be used.
As volatile oil, kerosene etc. are employable, for example.
As the inert gas, for example, nitrogen gas or argon gas can be employed.

In the invention according to claim 6, a plurality of the ineffective magnetic field cleaning means are arranged along at least one of the inner periphery and the outer periphery of the porous rotating container, and each of the ineffective magnetic field cleaning means is used. The magnetic separation apparatus according to claim 1, wherein different cleaning media are used.

According to the sixth aspect of the present invention, a plurality of ineffective magnetic field cleaning means are arranged along at least one of the inner periphery and the outer periphery of the porous rotating container, and are supplied from each ineffective magnetic field cleaning means. Since the cleaning media are different, different cleaning media are sequentially supplied to the magnetic media in the respective divided chambers that are passing through the reactive magnetic field. With this configuration, it is possible to select an optimal cleaning sequence using different cleaning media, the removability of magnetic substances magnetically attached to the surface of the magnetic medium, and the treatment liquid (foreign matter) adhering to this surface Can be improved.

The ineffective magnetic field cleaning means may be disposed on the inner periphery or the outer periphery of the porous rotating container. Moreover, you may arrange | position in both of these.
The number of ineffective magnetic field cleaning means used is arbitrary as long as it is two or three or more.
When three or more reactive magnetic field cleaning units are used, the same cleaning medium may be used by a plurality of reactive magnetic field cleaning units as long as the cleaning media are different in adjacent reactive magnetic field cleaning units. Of course, in all the ineffective magnetic field cleaning means, the cleaning medium may be different without exception. Each ineffective magnetic field cleaning means may be provided with only one supply unit (nozzle or the like) for supplying the cleaning medium to the division chamber, or two or more. When there are two or more supply units, the cleaning medium supplied from each supply unit possessed by one ineffective magnetic field cleaning means is one type (all the same).
“The cleaning media are different” means that there are two or more different cleaning media in the entire magnetic separation apparatus (a plurality of ineffective magnetic field cleaning units).

According to the first aspect of the present invention, the multi-rotation container is rotated in the vertical plane or the inclined plane around the rotation axis that is horizontal or inclined by the rotation driving means, so that each effective magnetic field of the magnetic medium is divided. The chambers reach sequentially, where the magnetic medium is magnetized. In this state, the raw material liquid is supplied from the raw material liquid supply means through the hole of the porous rotating container. Thereby, while the magnetic substance is magnetically attached to the surface of the magnetic medium, the treatment liquid from which the magnetic substance has been removed from the raw material liquid is discharged to the outside from another hole of the porous rotating container. Next, by further rotating the porous rotating container, the divided chambers in the effective magnetic field are sequentially moved to the ineffective magnetic field, and accordingly, each magnetic medium rolls while continuously collapsing in each divided chamber. In this rolling state, the cleaning medium is supplied from the ineffective magnetic field cleaning means toward each magnetic medium, so that the cleaning performance of the magnetic medium to which the magnetic material is attached can be improved. The recoverability of the magnetic material from the raw material liquid can also be improved.

Particularly, according to the second aspect of the present invention, when each divided chamber reaches the effective magnetic field in the upper part of the porous rotating container in sequence, the magnetic medium in the divided chamber is magnetized. Moreover, the raw material liquid is supplied from the raw material liquid supply means to the dividing chamber in the effective magnetic field through each hole of the porous member on the outer peripheral surface side, and the magnetic substance in the raw material liquid is magnetized on the surface of the magnetic medium. On the other hand, the processing liquid from which the magnetic material has been removed is discharged into the central space of the porous rotating container through the holes of the porous member on the inner peripheral surface side in the upper part of the porous rotating container. In this way, since the raw material liquid is supplied to each divided chamber through the outer peripheral surface of the porous rotating container having a larger surface area than the inner peripheral surface of the porous rotating container at the upper part of the porous rotating container, the raw material liquid from the inner peripheral surface side As compared with the supply of the magnetic material, the amount of magnetic adhesion of the magnetic material increases, and the magnetic separation efficiency can be increased. Moreover, since each dividing chamber has a funnel shape with a narrower discharge side than the supply side of the raw material liquid, the raw material liquid is easily stored in the dividing chamber, and the magnetic substance is easily magnetized on the surface of the magnetic medium. .

According to the third aspect of the present invention, when each of the divided chambers reaches the effective magnetic field in the lower part of the porous rotating container sequentially, the magnetic medium in the divided chamber is magnetized. Moreover, the raw material liquid is supplied from the raw material liquid supply means to the effective magnetic field dividing chamber through each hole of the porous member on the inner peripheral surface side. Thus, the magnetic material in the raw material liquid is magnetically attached to the surface of the magnetic medium, while the treatment liquid from which the magnetic material has been removed is at least of the outer peripheral surface side and the side surface side in the lower part of the porous rotating container. It is discharged to the lower space of the porous rotating container through each hole of the porous member on the outer peripheral surface side. As a result, since it is not necessary to provide a raw material liquid supply means that is easily increased in size above the porous rotating container, the magnetic separation device can be made compact. Moreover, even when a raw material liquid having a higher viscosity than water is used, it is possible to prevent the time for the raw material liquid from passing through the dividing chamber from being increased due to the high viscosity. This is because the raw material liquid is supplied to each division chamber at the lower part of the multi-hole rotating container, so that after the raw material liquid passes through the upstream area of the magnetic medium group, the downstream area has a larger volume than the upstream area and the dispersibility of the liquid is increased. This is because the raw material liquid is discharged outside.

According to the fourth aspect of the present invention, the cleaning medium is supplied from the effective magnetic field cleaning means to the downstream portion of the effective magnetic field from the supply position of the raw material liquid. Of the raw material liquid adhered to the substrate, only the liquid component excluding the magnetic substance can be washed away, so that the recovery rate of the treatment liquid can be increased.

According to the sixth aspect of the present invention, a plurality of ineffective magnetic field cleaning means are arranged along at least one of the inner periphery and the outer periphery of the porous rotating container, and each of the divided chambers that are passing through the ineffective magnetic field. Different cleaning media are sequentially supplied from each ineffective magnetic field cleaning means to the magnetic medium. With such a configuration, it is possible to select an optimal cleaning sequence using different cleaning media, the removal of magnetic substances magnetically attached to the surface of the magnetic medium, and the treatment liquid (foreign matter) adhering to the surface. Detergency can be improved.

It is a perspective view of the main structural body of the magnetic separation apparatus which concerns on Example 1 of this invention. It is a front view of the magnetic separation apparatus which concerns on Example 1 of this invention. It is a right view of the magnetic separation apparatus which concerns on Example 1 of this invention. It is a top view of the magnetic separation apparatus which concerns on Example 1 of this invention. It is a principal part expanded longitudinal cross-sectional view which shows the discharge system path | route of the process liquid which processed the raw material liquid supplied to the magnetic separation apparatus which concerns on Example 1 of this invention. It is a front view which shows schematic structure of the other magnetic separation apparatus which concerns on Example 1 of this invention. It is a principal part enlarged front view of the end plate in which the liquid drainage hole was formed among the porous rotation containers which comprise a part of magnetic separation apparatus concerning Example 1 of this invention. FIG. 3 is a perspective view showing each magnetic medium housed in a division chamber in an upward state (reference position) in the magnetic separation apparatus according to Embodiment 1 of the present invention. In the magnetic separation apparatus according to Embodiment 1 of the present invention, each is a perspective view showing each magnetic medium housed in a division chamber in a sideways state (90 ° rotation state). FIG. 3 is a perspective view showing each magnetic medium housed in a division chamber in a downward state (180 ° rotation state) in the magnetic separation device according to Embodiment 1 of the present invention. It is a front view which shows schematic structure of another magnetic separation apparatus which concerns on Example 1 of this invention. It is a right view of another magnetic separation apparatus which concerns on Example 1 of this invention. In the magnetic separation apparatus according to Embodiment 1 of the present invention, it is a front view showing a rolling locus of a magnetic medium in a division chamber.

Hereinafter, embodiments of the present invention will be described in detail. Here, for convenience of explanation, in FIG. 1, the front direction is the front (front) direction of the apparatus, the rear direction is the back (rear) direction of the apparatus, the left direction is the left direction of the apparatus, and the right direction is the right direction of the apparatus. To do.

In FIG. 1, reference numeral 10 denotes a magnetic separation apparatus according to Embodiment 1 of the present invention. This magnetic separation apparatus 10 has an inner space in a circumferential direction by a gantry 11 and a trapezoidal partition plate 12 made of stainless steel (nonmagnetic material). An annular porous rotating container 14 made of stainless steel whose center axis is horizontal and which is divided into 16 division chambers 13 toward the front, and each division chamber 13 can be moved by its own weight in the division chambers 13 freely. A drive motor (rotation drive means) that rotates the porous rotary container 14 in a vertical plane around the stored iron ball (magnetic medium) 15 and the rotary shaft 16 disposed on the central axis of the porous rotary container 14. 17, a magnet M that is arranged outside a part of the porous rotating container 14 and generates an effective magnetic field A that sequentially passes through each of the divided chambers 13 as the porous rotating container 14 rotates, and each of the divided parts that have reached the effective magnetic field A In chamber 13, The raw material liquid input part (raw material liquid supply means) 19 for supplying the rolling oil (raw material liquid) 18 containing the properties, and the respective divisions that have passed through the effective magnetic field A and reached the invalid magnetic field B that the magnetic force of the magnet M does not reach. By supplying a cleaning liquid (cleaning medium) to the chamber 13, three cleaning nozzles (invalid magnetic field) that separate the magnetic substances adhering to the surface of the iron balls 15 of the divided chamber 13 that have reached the reactive magnetic field B by cleaning. Inner cleaning means) 20.

Hereinafter, the magnetic separation device 10 will be described in more detail with reference to FIGS.
As shown in FIGS. 2 to 7, the frame 11 has a gantry 11 in which a support 22 is suspended from each corner of a horizontal rectangular frame 21. A portal frame 23 is erected on both corners of one long side frame 21 a of the rectangular frame 21, and a portal frame of the same shape is also formed on an intermediate portion of both short side frames 21 b of the rectangular frame 21. 23 is erected. The intermediate portions of the two support legs 23 a of the two-port frame 23 are connected by a reinforcing frame 24. On the double-gate frame 23, a horizontally-long rectangular frame-shaped yoke 25 made of a magnetic material is erected. On the inner surface of the intermediate portion in the longitudinal direction of the yoke 25, a pair of the magnets M are arranged such that the upper part of the porous rotating container 14 is spaced forward and backward, and an effective magnetic field A is generated on the upper part of the porous rotating container 14. Is arranged. Both magnets M are horizontally long rectangular parallelepiped neodymium magnets capable of obtaining about 0.5 Tesla.

In the yoke 25, the raw material liquid input part (raw material liquid supply means) 19 that is disposed immediately above the porous rotating container 14 and supplies the rolling oil 18 to each of the divided chambers 13 reaching the upper part of the porous rotating container 14 includes: It is fixed via a bracket 27. An effective magnetic field cleaning nozzle (effective magnetic field) for supplying a cleaning liquid for washing the rolling oil 18 adhering to the surface of the iron ball 15 to a part downstream of the supply position of the rolling oil 18 in the effective magnetic field A. Inner cleaning means) 28 is attached (FIGS. 1, 2, and 4). As described above, the cleaning liquid is sprayed to the downstream portion from the supply position of the rolling oil 18 using the cleaning nozzle 28 in the effective magnetic field, so that the magnetic material magnetized on the surface of each iron ball 15 remains, and the rolling oil Only 18 liquid components (treatment liquid 31) can be washed away. As a result, the recovery rate of the processing liquid 31 can be increased. In place of the rolling oil 18, for example, ore slurry may be used as the raw material liquid.

The intermediate portion in the length direction of the front portal frame 23 receives the treatment liquid 31 discharged through the slant 33 having a hook shape via the inclined bracket 29 at the upper portion, and discharges it to the front of the apparatus. The drainage chute 32 is fixed (FIGS. 1 to 5). Further, in the vicinity of the middle portion in the length direction of the front portal frame 23, a position of 100 ° toward the rotation direction of the porous rotating container 14 with respect to the charging position of the rolling oil 18 of the porous rotating container 14, and 140 A cleaning liquid (cleaning medium, cleaning medium, cleaning medium, and the like) is passed from the center of the porous rotating container 14 toward each of the dividing chambers 13 through a rooster 33 that closes the opening on the inner peripheral side of each of the dividing chambers 13 at three positions: Here, the three ineffective magnetic field cleaning nozzles 20A to 20C for injecting tap water are sequentially arranged. By spraying the cleaning liquid from each of the ineffective magnetic field cleaning nozzles 20A to 20C into each of the divided chambers 13, the magnetic material adhering to each iron ball 15 of each of the divided chambers 13 is washed away, and the used cleaning liquid containing the magnetic material is washed away. It falls onto the magnetic substance collecting chute 35 directly below through the wire mesh 34. The magnetic material recovery chute 35 has a rectangular opening that is long in the lateral direction on the upper end surface, and both end portions in the length direction are fixed to the reinforcing frames 24. The magnetic substance recovery chute 35 wraps the entire lower part of the porous rotating container 14 from below.

Note that different cleaning media may be ejected from the three ineffective magnetic field cleaning nozzles 20A to 20C (FIG. 6). For example, water is ejected from the most upstream ineffective magnetic field cleaning nozzle 20A, surface active water (soap water, etc.) is ejected from the second ineffective magnetic field cleaning nozzle 20B, and from the third ineffective magnetic field cleaning nozzle 20C. Volatile oil (such as kerosene) may be injected. Of these, the injection of the surface active water and the volatile oil is advantageous for cleaning the oil adhering to the surface of each iron ball 15. In this way, when different cleaning liquids are sequentially sprayed for each area, the internal space 35a is replaced with the cleaning liquid instead of the magnetic substance recovery chute 35 so that the respective cleaning liquids are generally individually recovered and the subsequent waste liquid processing becomes easy. It is preferable to use a three-tank chute 35A having three drains according to the type (three here) and having a dedicated drain 35b for each section.

In addition, a rectangular scaffolding frame base 36 having a height lower than that of the double-gate frame 23 and long in the lateral direction in plan view is provided on the other long side portion of the rectangular frame body 21. A scaffold plate (step) 37 made of metal is provided on the scaffold frame base 36. On one end of the scaffolding frame 36 in the length direction, the drive motor 17 with a speed reducer 17A is fixed with the length direction of the output shaft 17a facing forward. The drive motor 17 is a transmission motor, and a small-diameter sprocket 38 is fixed to the output shaft 17a.
A pair of bearings 39 are disposed in the middle portion in the length direction of the two-port frame 23, and both end portions of the rotating shaft 16 are supported by the two bearings 39. The rotary shaft 16 has a rear end protruding outward from the rear bearing 39, and a large-diameter sprocket 40 is fixed to the protruding portion. An endless chain 41 is bridged between the

sprockets

38 and 40. Both

sprockets

38 and 40 are covered with a horizontally long metal cover 42 fixed to the scaffold frame 36 so that the scattered rolling oil 18 and the like do not adhere. By rotating the output shaft 17a of the drive motor 17, the rotating shaft 16 rotates through both the

sprockets

38 and 40 and the endless chain 41, whereby the porous rotating container 14 rotates counterclockwise.
The two-port frame 23 is provided with a total of two pairs of pivot rollers 43 that are in contact with the annular end plates 14a on the outer peripheral portion of the multi-hole rotating container 14. By these shaft support rollers 43, it is possible to prevent the shake during rotation of the porous rotating container 14 rotating around the rotation shaft 16 and to rotate the porous rotating container 14 while suppressing noise caused by the shake.

Next, the porous rotary container 14 will be described in detail with reference to FIGS.
As shown in FIGS. 1 to 5, each divided chamber 13 of the multi-hole rotating container 14 is mainly partitioned by both end plates 14 a and the respective partition plates 12. Each of the divided chambers 13 is arranged in the inner space of the outer peripheral portion of the porous rotating container 14 at a predetermined pitch (here, 22.5 °) in the circumferential direction. The central portion of the porous rotating container 14 is constituted by a central disk 44 made of stainless steel. The rotating shaft 16 is fixed to the central portion of the central disk 44. Both end plates 14a are non-porous ring-shaped plates made of stainless steel. A large number of drain holes 14b having a diameter (for example, 5 to 8 mm) through which the iron balls 15 do not pass may be formed in the inner peripheral portion of the both end plates 14a (FIG. 7).
A rooster 33 is fixed on the inner peripheral surface of the porous rotating container 14 so as to cover the opening on the inner peripheral side of each divided chamber 13. Further, a metal mesh 34 is stretched on the outer peripheral surface of the porous rotating container 14 so as to cover the opening on the outer peripheral side of each divided chamber 13. The gap (9 mm) of the rooster 33 and the mesh (6.47 mm) of the wire net 34 are sized so that the iron balls 15 having a diameter of 12.7 mm do not pass through. The number of iron balls 15 that occupies 75% of the internal space in each divided chamber 13 is stored.

Next, with reference to FIGS. 1 to 5 and FIGS. 8 to 10, a magnetic separation method of the rolling oil 18 containing magnetic material by the magnetic separation apparatus 10 according to the first embodiment of the present invention will be described.
As shown in FIGS. 1 to 5, the effective magnetic field A of the magnet M is obtained by rotating the porous rotating container 14 counterclockwise at 0.5 rpm around the rotation axis 16 by the drive motor 17. Each division chamber 13 arrives sequentially, and the iron ball 15 in each division chamber 13 that has reached is magnetized. At this time, the effective magnetic field A is supplied with the rolling oil 18 containing the magnetic material supplied from the raw material liquid input unit 19 through the wire mesh 34 of each division chamber 13. Thereby, in the divided chamber 13 in the effective magnetic field A, a magnetic material is magnetically attached to the surface of the iron ball 15. At that time, since each rolling ball 18 is supplied to each iron ball 15 accommodated in each division chamber 13 from only one direction (above), in each division chamber 13, the upper part of the surface of each iron ball 15. The amount of magnetic material attached to the side region increases. On the other hand, the processing liquid 31 is discharged to the outside through the rooster 33. That is, the processing liquid 31 is discharged to the outside at the center of the porous rotating container 14, and then discharged to the lower front of the magnetic separation device 10 by the draining chute 32, and then placed on the floor (not shown). It is recovered in the liquid recovery tank. Further, in the effective magnetic field A, in the downstream portion from the supply position of the rolling oil 18, a cleaning liquid for washing the rolling oil 18 adhering to the surface of the iron ball 15 is passed from the cleaning nozzle 28 in the effective magnetic field through the wire mesh 34 to each divided chamber. It is always sprayed toward each iron ball 15 in 13. In this way, by jetting the cleaning liquid from the effective magnetic field cleaning nozzle 28 to the downstream portion from the supply position of the rolling oil 18, among the raw material liquid adhering to the surface of each iron ball 15 at the same time as the magnetic separation of the magnetic material, Only the liquid (the processing liquid 31) excluding the magnetic material can be washed away, and the recovery rate of the processing liquid 31 can be increased.

After that, the rotation of the porous rotating container 14 by the drive motor 17 is continued, so that the divided chambers 13 in the effective magnetic field A sequentially move to the invalid magnetic field B, and the magnetization of each iron ball 15 in the divided chamber 13 is solved. It is burned. Along with this, each iron ball 15 rolls in each divided chamber 13 while being continuously crushed (FIGS. 8 to 10). As described above, each iron ball 15 accommodated in each divided chamber 13 is supplied with the rolling oil 18 only from above, so that the magnetic substance adheres to the upper region of the surface. Although the amount is large, the magnetic material is dispersed over the entire surface of each iron ball 15 by this rolling. Moreover, each of the divided chambers 13 sequentially reaches the 100 ° position, the 140 ° position, and the 200 ° position in the rotation direction of the porous rotating container 14 with reference to the charging position of the rolling oil 18 of the porous rotating container 14. At this time, the cleaning liquid being continuously jetted from the three ineffective magnetic field cleaning nozzles 20A to 20C passes from the central side of the porous rotating container 14 to the numerous iron balls 15 that are rolling in the divided chambers 13 through the wire meshes 34. Be sprayed. Thereby, the magnetic substance adhering to each iron ball 15 of each division chamber 13 is washed away. As a result, the magnetic material and the used cleaning liquid flow down to the magnetic material recovery chute 35 directly below through the wire mesh 34 of each divided chamber 13.
Subsequently, the magnetic material after cleaning and the used cleaning liquid are dropped and recovered in a magnetic material recovery tank (not shown) placed on the floor immediately below the magnetic material recovery chute 35. Thereafter, the rotation of the porous rotating container 14 further proceeds, so that the divided chamber 13 in which the cleaned iron ball 15 is accommodated reaches the effective magnetic field A again. The above operation is repeated while the rotation of the porous rotating container 14 is continued by the drive motor 17.

As described above, in the magnetic separation device 10 according to the first embodiment, the magnetic material is removed from the rolling oil 18 introduced into each division chamber 13 and the inside of each division chamber 13 while the porous rotary container 14 rotates once. Since the magnetic substance adhering to the large number of iron balls 15 is cleaned, the separation and recovery of the rolling oil 18 and the magnetic substance can be performed continuously and efficiently.
Further, when the multi-rotary container 14 is rotated in the vertical plane around the rotation axis 16 by the drive motor 17 and each divided chamber 13 sequentially reaches the effective magnetic field A, the iron ball 15 in each divided chamber 13 is magnetized. In this state, when the rolling oil 18 is supplied to the effective magnetic field A, the magnetic material is magnetically attached to the surface of the iron ball 15, while the processing liquid 31 is discharged to the outside. Thereafter, by further rotation of the porous rotating container 14, the divided chambers 13 sequentially move from the effective magnetic field A toward the ineffective magnetic field B, and each iron ball 15 rolls while continuously collapsing in each divided chamber 13. . Since the cleaning liquid is sprayed onto each iron ball 15 during the rolling, the magnetic material attached to the surface of each iron ball 15 is easily washed away. As a result, it is possible to improve the cleaning performance of the iron ball 15 to which the magnetic material is adhered, and accordingly, it is possible to improve the recoverability of the magnetic material from the rolling oil 18.

Further, when each divided chamber 13 reaches the effective magnetic field A in the upper part of the porous rotating container 14 in sequence, each iron ball 15 in the divided chamber 13 is magnetized. Moreover, the rolling oil 18 is supplied from the raw material liquid inlet 19 to the dividing chamber 13 in the effective magnetic field A through the holes of the wire mesh 34 disposed on the outer peripheral surface of the porous rotating container 14, and the magnetic material in the rolling oil 18 is changed. The treatment liquid 31 from which the magnetic material has been removed while being magnetically attached to the surface of the iron ball 15 is a long hole of each of the roosters 33 disposed on the inner peripheral surface of the porous rotating container 14 at the upper part of the porous rotating container 14. It is discharged to the central space of the multi-hole rotating container 14.

Thus, since the rolling oil 18 is supplied to each division chamber 13 through the outer peripheral surface (metal mesh 33) having a larger surface area than the inner peripheral surface (rooster 34) in the upper part of the porous rotating container 14, from the inner peripheral surface side. Compared with the supply of the rolling oil 18, the amount of magnetic material deposited increases, and the magnetic separation efficiency can be increased. This is because when the liquid containing the magnetic material is supplied to the magnetic medium group housed in the container, the amount of magnetic adhesion of the magnetic material increases in the upstream region compared to the downstream region of the magnetic medium group. And since each division | segmentation chamber 13 becomes a funnel shape with the discharge | emission side (inner peripheral surface side) narrow compared with the supply side (outer peripheral surface side) of the rolling oil 18 in this way, it rolls in each division | segmentation chamber 13. Oil 18 is easy to store. Therefore, the magnetic material is easily magnetically attached to the surface of each iron ball 15.

As shown in FIG. 11, the magnet M is arranged outside the lower part of the porous rotating container 14, an effective magnetic field A is generated at the lower part of the porous rotating container 14, and the rolling oil 18 is passed through each hole of the rooster 33. After being put into the dividing chamber 13, the processing liquid 31 may pass through each hole of the wire mesh 34 and be discharged out of the apparatus. In this case, if each divided chamber 13 reaches the effective magnetic field A below the porous rotating container 14 in sequence, the iron ball 15 in the divided chamber 13 is magnetized. As a result, the magnetic separation device 10 can be made more compact as compared with the case where the large raw material liquid charging unit 19 is provided above the porous rotating container 14. Moreover, even when the rolling oil 18 having a higher viscosity than water is used as the raw material liquid, it takes a long time for the rolling oil 18 to pass through each of the divided chambers 13 due to a decrease in fluidity due to the high viscosity. Can be suppressed. This is because the rolling oil 18 is supplied to the respective divided chambers 13 at the lower part of the multi-hole rotating container 14, so that the rolling oil 18 is a group of iron balls (a large number of iron balls 15 filled in the respective divided chambers 13). This is because after passing through the upstream region, the liquid passes through the downstream region where the volume is larger than the upstream region and the dispersibility of the liquid is increased, and the processing liquid 31 is discharged to the outside.
In FIG. 11, reference numeral 20 denotes a flushing chute of cleaning liquid that can be used in place of the ineffective magnetic field cleaning nozzle 20A.

Further, as shown in another magnetic separation device 10A in FIG. 12, the gantry 11A is gradually inclined downward toward the rear, so that the rotation axis 16 of the porous rotating container 14 is at an angle θ (about 15 ° with respect to the horizontal). ). By tilting the porous rotating container 14 in this way, the number of iron balls 14 in the dividing chamber 13 that can come into contact with the rolling oil 18 at the beginning of supply increases in each dividing chamber 13. The magnetic adhesion rate (removal rate) can be increased. This is because most of the magnetic material in the rolling oil 18 charged into the division chamber 13 is magnetically attached in the upstream region of the iron ball group, and in particular, the magnetic material on the upper surface (the uppermost iron ball 15) of the iron ball group. This is due to the largest amount of magnetic adhesion.

Here, referring to FIG. 13, when the porous rotating container 14 of the magnetic separation apparatus 10 is actually rotated five times, a test for confirming the position change of the iron ball 15 in the divided chamber 13 at each rotation is performed. Report the results. In addition, the number attached | subjected to the vicinity of the iron ball 15 shows the rotation speed (number of rounds) of the porous rotating container 14. Here, two tests (A, B) were performed. Therefore, there are numbers (2A, 2B, 5A, 5B) indicating the same number of rotations.
By rotating the porous rotating container 14, the iron ball 15 circulates in the division chamber 13 while drawing a substantially circular orbit. However, the distance and direction of movement are not constant, and the movement locus of the iron ball 15 is disturbed. This can be understood from the fact that the position of the iron ball 15 after one rotation and the position of the iron ball 15 after five rotations deviate from the two tests. In any case, it is clear that each iron ball 15 moves in the dividing chamber 13 by rotating the porous rotating container 14 in a state where the occupation ratio of the iron balls 15 in the dividing chamber 13 is 75%. .

The magnetic separation device of the present invention is useful when magnetically separating a magnetic substance from a raw material liquid such as rolling oil or ore slurry containing iron powder or iron oxide powder.

10, 10A magnetic separation device,
12 partition plate,
13 Division room,
14 porous rotating container,
15 Iron ball (magnetic medium),
16 axis of rotation,
17 drive motor (rotation drive means),
18 Rolling oil (raw material liquid),
19 Raw material liquid input part (raw material liquid supply means),
20A to 20C Invalid magnetic field cleaning nozzle (effective magnetic field cleaning means),
28 Effective magnetic field cleaning nozzle (effective magnetic field cleaning means),
33 Rooster (porous member),
34 Wire mesh (porous member),
A effective magnetic field,
B Invalid magnetic field,
M magnet.

Claims

A porous rotating container made of a nonmagnetic material in an annular shape in which the inner space is partitioned into a plurality of divided chambers in the circumferential direction by a partition plate made of a nonmagnetic material, and the central axis is horizontal or inclined;
In each of the divided chambers, a magnetic medium that is freely moved by its own weight in the divided chambers, and
Rotation driving means for rotating the porous rotating container in a vertical plane or an inclined plane around a rotation axis arranged on the central axis,
A magnet that is disposed outside a part of the porous rotating container and generates an effective magnetic field that sequentially passes through each of the divided chambers as the porous rotating container rotates;
Raw material liquid supply means for supplying a raw material liquid containing a magnetic substance to each of the divided chambers that have reached the effective magnetic field;
Magnetic material attached to the surface of the magnetic medium in the division chamber that has reached the invalid magnetic field by supplying a cleaning medium to each of the division chambers that has passed through the effective magnetic field and has reached the invalid magnetic field that the magnetic force of the magnet does not reach Separation apparatus comprising: an ineffective magnetic field cleaning unit that separates the substrate by cleaning.
The porous rotating container has a porous member disposed on at least the inner peripheral surface and the outer peripheral surface of the inner peripheral surface, the outer peripheral surface, and the side surfaces thereof,
The magnet is disposed outside the upper part of the porous rotating container, and the effective magnetic field is generated at the upper part of the porous rotating container;
The said raw material liquid is discharged | emitted out of an apparatus through each hole of the porous member of the said inner peripheral surface side after being supplied to the said division chamber through each hole of the porous member of the said outer peripheral surface side. The magnetic separation apparatus as described.
The porous rotating container has a porous member disposed on at least the inner peripheral surface and the outer peripheral surface of the inner peripheral surface, the outer peripheral surface, and the side surfaces thereof,
The magnet is disposed outside the lower part of the porous rotating container, and the effective magnetic field is generated at the lower part of the porous rotating container;
The said raw material liquid is discharged | emitted outside the apparatus through each hole of the porous member of the said outer peripheral surface side, after being supplied to the said division chamber through each hole of the porous member of the said inner peripheral surface side. The magnetic separation apparatus as described.
An effective magnetic field cleaning means for supplying the cleaning medium for washing away the liquid component adhering to the surface of the magnetic medium to a downstream portion of the effective magnetic field from the supply position of the raw material liquid. The magnetic separation device according to claim 1.
The magnetic separation device according to claim 1, wherein the cleaning medium is at least one of water, an aqueous alkali solution, surface active water, water vapor, volatile oil, compressed air, and inert gas.
A plurality of the ineffective magnetic field cleaning means are disposed along at least one of the inner periphery and the outer periphery of the porous rotating container,
The magnetic separation apparatus according to claim 1, wherein each of the ineffective magnetic field cleaning units uses a different cleaning medium.