Magnetic particle removal device

Abstract

The present invention provides a magnetic particle removal device that prevents malfunctions in the device and avoids harm to those operating the device, even when high-temperature raw materials containing magnetic particles are passed through the passageway. [Solution] A passage 104 through which a high-temperature raw material containing magnetic particles flows, the passage 104 having an adsorption part 105 for adsorbing magnetic particles contained in the raw material, a heat conductive member through which heat is transferred in the passage 104, a cooling means for cooling the passage 104, and a heat transfer means with high thermal conductivity for transferring heat in the passage 104, which is connected to the cooling means and reduces the temperature of the heat transferred from the passage 104.

Description

Technical Field

[0001] This invention relates to a device for removing magnetic particles.

Background Art

[0002] Regarding the device for removing magnetic particles, there is one described in Patent Document 1 filed by the inventors of the present application. This invention is to bias or hold a pair of magnetic pole bodies made of an electromagnet or a permanent magnet with opposite polarities and arrange them opposite to each other, and form a passage through which a fluid containing fine magnetic particles flows between the opposing surfaces of the pair of magnetic pole bodies, and arrange a magnetic body for adsorbing fine magnetic particles regularly or irregularly spaced at a required interval within the passage, which is a device for separating and removing fine magnetic particles.

[0003] In this separation and removal device, the magnetic body arranged between the opposing surfaces of the pair of magnetic pole bodies is provided with a plurality of rod-shaped bodies made of a magnetic material spaced apart at a predetermined angle with respect to the opposing surface side of the magnetic pole body, and one end, both ends or an intermediate portion of the rod-shaped body is held by a support plate to form a rod-shaped body unit. <着

[0004] Also, in this separation and removal device, the rod-shaped body unit is made to be insertable and removable between the opposing surfaces of the pair of magnetic pole bodies, and is housed and arranged in a holder provided with an inlet and an outlet for the fluid in the flowing direction of the fluid containing fine magnetic particles.

[0005] Furthermore, this device for separating and removing fine magnetic particles is characterized in that a heating device for heating the fluid flowing through the passage is disposed on the inner surface side of the passage.

[0006] This section describes an example of a separation and removal process using a fine magnetic particle separation and removal apparatus, in which a sample consisting of a mixture of Ni powder with a Curie temperature of approximately 358°C and Fe powder with a Curie temperature of approximately 771°C is used as the target for separation and removal of fine magnetic particles. Specifically, the heating device 40 is set to a temperature of 400-450°C, and the magnetic material 18 for adsorbing and separating magnetic particles, which is placed in the passage through which the above sample passes, is made of a magnetic material (for example, Fe) having a Curie temperature of 450°C or higher.

[0007] With the fine magnetic particle separation and removal device configured in this way, when the above sample is passed through the passage, the Ni powder becomes paramagnetic, but the Fe powder remains ferromagnetic. Therefore, the Ni powder passes through the magnetic material and is collected in the required collection container, while the Fe powder is adsorbed and separated from the magnetic material. Furthermore, when stainless steel powder (SUS304 that has become magnetic due to stress applied to it, resulting in a change in composition) is used instead of Fe powder, this stainless steel powder can be adsorbed and separated from the magnetic material mentioned above.

[0008] Furthermore, we will explain an example of a separation and removal process using this fine magnetic particle separation and removal device, where the target of separation and removal of fine magnetic particles is a sample consisting of a mixture of Fe powder with a Curie temperature of approximately 771°C and Co powder with a Curie temperature of approximately 1117°C.

[0009] In this case, the heating device is set to a temperature of 800-850°C, and the magnetic material used to adsorb and separate magnetic particles in the passage through which the sample passes is made of a magnetic material (for example, Co) having a Curie temperature of 1117°C or higher. When the sample is passed through the passage using this fine magnetic particle separation and removal device, the Fe powder becomes paramagnetic, but the Co powder remains ferromagnetic. Therefore, the Fe powder passes through the magnetic material and is collected in the required collection container, while the Co powder is adsorbed and separated from the magnetic material.

[0010] As described above, it is evident that the fine magnetic particle separation and removal device can appropriately adsorb and separate fine magnetic particles when removing magnetic foreign matter from high-temperature raw materials.

[0011] When removing magnetic foreign matter from high-temperature raw materials in this manner, the temperature of the adsorption part (magnetic pole) rises, and the temperature of the electromagnet and the main body of the separation and removal device also rises. If the temperature of the electromagnet rises, there is a risk of deterioration of the insulation in the electrical wiring and faulty wiring connections. If the temperature of the device used to separate and remove fine magnetic particles rises, there is a risk of burns if a person (such as an operator) touches it. Therefore, it is necessary to prevent heat from the adsorption section from being transferred to the electromagnets within the fine magnetic particle separation and removal device, as well as to the main body of the fine magnetic particle separation and removal device. [Prior art documents] [Patent Documents]

[0012] [Patent Document 1] Japanese Patent Publication No. 2008-018422 [Overview of the Initiative] [Problems that the invention aims to solve]

[0013] The present invention was made to solve the problems of magnetic particle removal devices described above, and its objective is to provide a magnetic particle removal device that does not cause malfunctions to the device or harm to those operating the device, even when high-temperature raw materials containing magnetic particles are passed through the passage. [Means for solving the problem]

[0014] The magnetic particle removal apparatus according to this embodiment is characterized by comprising: a passage for passing a high-temperature raw material containing magnetic particles through, the passage having an adsorption section for adsorbing magnetic particles contained in the raw material; a heat conductive member through which heat is transferred in the passage; a cooling means for cooling the passage; and a heat transfer means with high thermal conductivity for transferring heat in the passage, which is connected to the cooling means and reduces the temperature of the heat transferred from the passage.

[0015] In the magnetic particle removal device according to the embodiment, as the heat conduction member, a pair of magnet bodies provided opposite to each other are provided, and the passage is provided between the pair of magnet bodies.

[0016] In the magnetic particle removal device according to the embodiment, the heat transfer means is a plate with high thermal conductivity, and the cooling means is configured by flowing a cooling medium through a tube body to cool the plate with high thermal conductivity.

[0017] In the magnetic particle removal device according to the embodiment, the plate with high thermal conductivity is inserted between the passage and the magnet body.

[0018] In the magnetic particle removal device according to the embodiment, the cooling means is created by heat dissipation fins.

[0019] In the magnetic particle removal device according to the embodiment, the heat transfer means is a plate with high thermal conductivity, and the plate with high thermal conductivity is made of copper or aluminum.

[0020] The magnetic particle removal device according to the embodiment includes a passage through which a high-temperature raw material containing magnetic particles flows, the passage having an adsorption portion that adsorbs magnetic particles contained in the raw material, a heat conduction member to which the heat of the passage is transferred, and a heat insulating material provided in a heat transfer path through which the heat of the passage is transferred to the heat conduction member, the heat insulating material blocking the transfer of heat.

[0021] In the magnetic particle removal device according to the embodiment, the heat insulating material is an epoxy resin plate. The heat insulating material is an epoxy resin plate.

Brief Description of the Drawings

[0022] [Figure 1] Side view of the main part of the magnetic particle removal device according to the first embodiment of the present invention. [Figure 2] Perspective view of the configuration of the main part of the magnetic particle removal device according to the embodiment of the present invention. [Figure 3] Front view of the first configuration example of the cooling means in the magnetic particle removal device according to an embodiment of the present invention. [Figure 4] Front view of the second configuration example of the cooling means in the magnetic particle removal device according to an embodiment of the present invention. [Figure 5] Side view of the main part in the magnetic particle removal device according to the second embodiment of the present invention. [Figure 6] Perspective view of the heat radiation fins used in the magnetic particle removal device according to the third embodiment of the present invention. [Figure 7] Side view of the main part in the magnetic particle removal device according to the fourth embodiment of the present invention.

Embodiments for Carrying Out the Invention

[0023] Hereinafter, a magnetic particle removal device according to an embodiment of the present invention will be described with reference to the accompanying drawings. In each figure, the same reference numerals are assigned to the same components, and duplicate explanations are omitted. FIG. 1 shows a side view of the main part of the magnetic particle removal device according to the first embodiment of the present invention. The magnetic particle removal device according to the embodiment has a yoke 101. The yoke 101 is formed in a planar "U" shape as shown in FIG. 2. Electromagnetic coils 102A and 102B are wound at positions close to both tip ends of the yoke 101, and both tip ends of the yoke 101 are magnetic pole bodies 103A and 103B. The end face of the magnetic pole body 103A and the end face of the magnetic pole body 103B are opposing different-pole portions, and magnetic flux lines are generated. A similar configuration can also be obtained by using permanent magnets instead of the electromagnetic coils 102A and 102B.

[0024] A passage 104 extending in the vertical direction of the figure is provided in the space where the end face of the magnetic pole body 103A and the end face of the magnetic pole body 103B face each other. This passage 104 is a passage through which a high-temperature raw material containing magnetic particles flows, and the passage 104 includes an adsorption portion 105 that adsorbs the magnetic particles contained in the raw material.

[0025] The passage 104 can be made of a tube and can extend vertically through the yoke 101 in the diagram. The adsorption section 105 is provided with a magnetic material 106, which can adsorb magnetic particles contained in the raw material. The magnetic material 106 is rod-shaped and extends straight from the front to the back of the paper in the diagram. Therefore, the raw material passes through the passage 104 and comes into contact with multiple linear magnetic material 106 extending horizontally from the top, causing magnetic particles to be adsorbed.

[0026] In this example, the passage 104 is cylindrical, and the yoke 101 is rectangular. The tip of the yoke 101 is cut to reveal a square shape, and this part becomes the magnetic poles 103A and 103B.

[0027] The passage 104 is in contact with the outer wall of the passage 104 at a portion corresponding to the square at the tip of the yoke 101, and the inside of this contact portion is the adsorption portion 105. When a sample containing a small amount of Fe powder to be removed mixed with high-temperature Ni powder is passed through the passage 104 at a temperature of 400-450°C, the Ni powder becomes paramagnetic, but the Fe powder remains ferromagnetic. Therefore, the Ni powder passes through the magnetic material and is collected in the required collection container, while the Fe powder can be adsorbed and separated from the magnetic material.

[0028] In this structure, in which a thermally conductive plate 107 is interposed between the passage 104 and the magnetic pole bodies 103A and 103B, the plate 107, which is a heat transfer means with high thermal conductivity, is connected to a cooling means to lower the temperature of the heat transferred from the passage 104, as will be described below.

[0029] The heat from the high-temperature raw material flowing from above through the passage 104 is conducted to the yoke 101 via the magnetic poles 103A and 103B. Therefore, the magnetic poles 103A and 103B and the yoke 101 are heat-conducting members through which the heat from the passage is transferred. In this embodiment, a cooling means is provided to cool the passage 104. This cooling means is constructed by flowing a cooling medium through the pipe 110 and cooling a plate with high thermal conductivity. Water can be used as the cooling medium.

[0030] In this embodiment, a heat transfer means with high thermal conductivity is provided to transfer heat from the passage 104, and is connected to the cooling means to lower the temperature of the heat transferred from the passage 104. A plate 107 with high thermal conductivity can be used as the heat transfer means with high thermal conductivity, and this plate 107 with high thermal conductivity can be made of copper or aluminum. The structure includes a plate 107 with high thermal conductivity interposed between the passage 104 and the magnetic poles 103A and 103B.

[0031] As shown in Figure 1, the plate 107 with high thermal conductivity can be cooled by surrounding it with a tube 110 and flowing water through it. Also, as shown in Figure 3, the plate 107 with high thermal conductivity can be cooled by attaching a tube 110 in a circular shape to the outer area 107G of the plate 107 that does not come into contact with the magnetic poles 103A and 103B and flowing water through it. In this case, the circle may be double, triple, or even more. Furthermore, as shown in Figure 4, the plate 107 with high thermal conductivity can be cooled by attaching a tube 110 in a zigzag pattern in a circular shape to the outer area 107G of the plate 107 that does not come into contact with the magnetic poles 103A and 103B and flowing water through it. In short, by attaching the tubes 110 to the area where they can be attached in the outer area 107G of the plate 107 with high thermal conductivity that does not come into contact with the magnetic poles 103A and 103B, at the highest possible density, and then flowing water through it, the cooling effect can be increased.

[0032] Figure 5 shows a magnetic particle removal device according to the second embodiment. In the first embodiment described above, a plate 107 with high thermal conductivity was interposed between the passage 104 and the magnetic poles 103A and 103B. However, in this embodiment, the magnetic poles 103A and 103B are connected to the plate 107 with high thermal conductivity by penetrating the plate 107 with high thermal conductivity. In this case as well, the tube 110 is attached as shown in Figure 3 or Figure 4. In this embodiment, the plate 107 with high thermal conductivity comes into contact with the outer periphery of the magnetic poles 103A and 103B, and cooling occurs.

[0033] In the third embodiment, the heat dissipation fins 200 shown in Figure 6 are used. The heat dissipation fins 200 have a shape in which a plurality of plate-shaped fins 202 are embedded on one side of the mounting base 201. The side of the mounting base 201 that does not have fins 202 is attached to the outer area 107G of the plate 107 with high thermal conductivity shown in Figure 3, which does not come into contact with the magnetic poles 103A and 103B. Cooling is performed by heat dissipation from the plurality of plate-shaped fins 202. Alternatively, a fan may be provided to blow air onto the plurality of plate-shaped fins 202 to enhance the cooling effect.

[0034] Figure 7 shows the configuration of the fourth embodiment. In the fourth embodiment, instead of the plate 107 with high thermal conductivity of the first embodiment, an insulating material 307 that blocks heat transfer is used. The structure includes an insulating material 307 interposed between the passage 104 and the magnetic pole bodies 103A and 103B. In the fourth embodiment, there is no cooling means as used in the first embodiment, and the heat transmitted from the passage 104 is blocked by the insulating material 307. Except for the above configuration, the configuration of this fourth embodiment is the same as that of the first embodiment. The insulating material 307 can be, for example, an epoxy resin plate. This configuration also prevents temperature rise in the yoke 101, the magnetic pole bodies 103A and 103B, and furthermore, in the electromagnetic coils 102A and 102B, prevents deterioration of the insulation of the electrical wiring, and reduces the risk of wiring connection failure.

[0035] Thus, with the magnetic particle removal apparatus of this embodiment, even when high-temperature raw materials containing magnetic particles are passed through the passage, it is possible to appropriately adsorb and separate fine magnetic particles while preventing malfunctions in the apparatus or harm to those handling the apparatus. [Explanation of Symbols]

[0036] 101 York 102A Electromagnetic Coil 102B Electromagnetic Coil 103A magnetic pole body 103B Magnetic pole body 104 Passage 105 Adsorption part 106 Magnetic material 107 board 107G Outer Area 110 Tube Body 200 heat dissipation fins 201 Mounting base 202 Fins

Claims

1. A passage for passing a high-temperature raw material containing magnetic particles, the passage comprising an adsorption section for adsorbing magnetic particles contained in the raw material, A heat-conducting member through which heat is transferred in the aforementioned passage, A cooling means for cooling the aforementioned passage, A heat transfer means with high thermal conductivity that transfers heat through the passage, and a heat transfer means connected to the cooling means that lowers the temperature of the heat transferred from the passage, A magnetic particle removal device characterized by comprising the following:

2. The heat conducting member comprises a pair of magnetic poles provided opposite each other, The magnetic particle removal device according to claim 1, characterized in that the passage is provided between the pair of magnetic pole bodies.

3. The heat transfer means is a plate with high thermal conductivity, The magnetic particle removal device according to claim 1, characterized in that the cooling means is constructed by flowing a cooling medium through a tubular body to cool the plate with high thermal conductivity.

4. The magnetic particle removal device according to claim 3, characterized in that the plate with high thermal conductivity is interposed between the passage and the magnetic pole body.

5. The magnetic particle removal apparatus according to claim 1, characterized in that the cooling means is made of heat dissipation fins.

6. The heat transfer means is a plate with high thermal conductivity, The magnetic particle removal device according to claim 1, characterized in that the plate with high thermal conductivity is made of copper or aluminum.

7. A passage for passing a high-temperature raw material containing magnetic particles, the passage comprising an adsorption section for adsorbing magnetic particles contained in the raw material, A heat-conducting member through which heat is transferred in the aforementioned passage, A heat transfer path is provided in which the heat from the passage is transferred to the heat conduction member, and an insulating material is provided to block the transfer of heat. A magnetic particle removal device characterized by comprising the following:

8. The magnetic particle removal device according to claim 7, characterized in that the thermal insulation material is an epoxy resin board.

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