WO2011049217A1 - 強磁性体の分離装置 - Google Patents
強磁性体の分離装置 Download PDFInfo
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- WO2011049217A1 WO2011049217A1 PCT/JP2010/068768 JP2010068768W WO2011049217A1 WO 2011049217 A1 WO2011049217 A1 WO 2011049217A1 JP 2010068768 W JP2010068768 W JP 2010068768W WO 2011049217 A1 WO2011049217 A1 WO 2011049217A1
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- iron
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- 238000000926 separation method Methods 0.000 title claims abstract description 51
- 239000003302 ferromagnetic material Substances 0.000 title claims abstract description 46
- 230000005291 magnetic effect Effects 0.000 claims abstract description 101
- 230000005294 ferromagnetic effect Effects 0.000 claims abstract description 93
- 239000011812 mixed powder Substances 0.000 claims description 45
- 230000004907 flux Effects 0.000 claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 122
- 239000002245 particle Substances 0.000 abstract description 114
- 229910052742 iron Inorganic materials 0.000 abstract description 61
- 239000002893 slag Substances 0.000 abstract description 51
- 239000012530 fluid Substances 0.000 abstract description 50
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- 239000007788 liquid Substances 0.000 description 3
- 238000007885 magnetic separation Methods 0.000 description 3
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- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
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- -1 ferrous metals Chemical class 0.000 description 2
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Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
- B03C1/30—Combinations with other devices, not otherwise provided for
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
- B03C1/025—High gradient magnetic separators
- B03C1/031—Component parts; Auxiliary operations
- B03C1/033—Component parts; Auxiliary operations characterised by the magnetic circuit
- B03C1/0335—Component parts; Auxiliary operations characterised by the magnetic circuit using coils
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
- B03C1/26—Magnetic separation acting directly on the substance being separated with free falling material
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B5/00—Treatment of metallurgical slag ; Artificial stone from molten metallurgical slag
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C2201/00—Details of magnetic or electrostatic separation
- B03C2201/16—Magnetic separating gases form gases, e.g. oxygen from air
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C2201/00—Details of magnetic or electrostatic separation
- B03C2201/20—Magnetic separation whereby the particles to be separated are in solid form
Definitions
- the present invention relates to a technology for separating a ferromagnetic material from a heterogeneous mixed powder containing a ferromagnetic material, and is applied to, for example, the technical field of separating iron from slag produced in an iron making process.
- Enormous slag (iron slag) is generated in the iron making process (especially hot metal pretreatment and converter process). These slags are produced by the reaction of calcium additives added to remove impurities and unnecessary elements in hot metal and molten steel. Of course, the slag contains a large amount of iron as well as the removed elemental compounds. It is. ⁇ Many slag forms are massive, and the size is large and some are several hundred mm.
- a large slag lump of several hundred mm is shaped with a sieve called a grind (grid-type sieve) Sort out.
- the small slag block that has passed through the grind-type sieve has an iron block and a non-ferrous block fixed to each other. Therefore, the slag block is crushed with a hammer crusher or a rod mill for several hundreds.
- the size of ⁇ m to several tens of mm is promoted to promote liberation of iron and non-ferrous components.
- iron and non-ferrous components are separated by a magnetic separator.
- a suspended type sustained electro magnets
- a drum type magnetic drum separators
- a pulley type magnetic pully
- ⁇ ⁇ ⁇ As a means for separating iron, it may be crushed by heating the slag and controlling the subsequent cooling time. Depending on the cooling time, it is possible to crush and separate only the fixed non-ferrous block without crushing the iron block. Or it can be atomized to about several tens of ⁇ m.
- Patent Document 1 and Patent Document 2 describe a technique for separating metal particles from slag.
- JP 2006-142136 A Japanese Patent Laid-Open No. 10-130041
- the separation concentration of iron from steelmaking slag it is necessary to promote the separation of iron and non-ferrous metals.
- the separation of the simple substance progresses, so that the particle size is reduced by repeating mechanical crushing of the slag lump.
- the particle size may be reduced by heat treatment.
- non-ferrous particles non-magnetic particles 102
- iron particles magnetic particles 101
- Embracing phenomenon 107 and agglomeration phenomenon 108 due to dry atomization easily occur. These phenomena can easily cause the non-magnetic particles 102 to be separated on the magnetized side 105, and conversely, the magnetic particles 101 can be separated on the non-magnetized side 104, thereby improving the separation concentration (separation accuracy). It becomes difficult to make. Therefore, the speed of the supply 103 of the different kind mixed powder 111 (mixed powder of the magnetic particles 101 and the non-ionic particles 102 in FIG.
- Patent Document 1 discloses a technique for separating iron and non-ferrous components without crushing the slag lump, but the separation process becomes complicated and causes an increase in processing costs.
- the present invention has been made in view of the circumstances as described above. For example, as in the case of separating iron from atomized iron slag, the ferromagnetic material is separated from the heterogeneous mixed powder containing the ferromagnetic material. It is an object of the present invention to provide a ferromagnetic separator that can efficiently separate a ferromagnetic.
- iron and non-ferrous components will be separated from atomized iron slag, but iron slag is premised on mass processing (several to several tens of tons per hour).
- mass processing severe to several tens of tons per hour.
- general magnetic sorting cannot be applied to such a case where a large amount of processing is assumed, because the processing speed has to be slowed down due to particle embedding phenomenon and particle aggregation phenomenon.
- the present inventors solve the problems that occur when separating a ferromagnetic material from a heterogeneous mixed powder containing a ferromagnetic material, such as when separating iron from atomized iron slag as described above.
- we conducted an intensive study As a result, when separating a ferromagnetic material from a heterogeneous mixed powder containing a ferromagnetic material, an air flow or water flow in which the heterogeneous mixed powder is dispersed is subjected to a force that changes the magnitude depending on the mass of the powder.
- centrifugal force is used for separation into a separation chamber (mass difference separation chamber) that performs separation, and in the mass difference separation chamber, magnetic force is applied to the ferromagnetic material in the mixed powder of different types in addition to centrifugal force. I came up with the idea of making it work.
- the mass difference separation position T it is conceivable to move the mass difference separation position T by ⁇ M to the side with larger mass as shown in FIG.
- the slag in the region S1 in the figure is also collected on the smaller mass side and the amount of slag collected is increased.
- the iron in the region S2 in the diagram is also collected on the smaller mass side. End up. As a result, the purity of the slag collected on the smaller mass side is greatly reduced.
- the mass difference separation position T is set as the boundary between M2 and M3, and the magnetic force is applied in the same manner, so that at least a part of the iron of M2 has a large mass. You can collect it on the side.
- the mass difference separation position T is at the boundary between M2 and M3 and all the iron in the range of M2 can be separated to the side with the larger mass, all the slag will be purified with a purity of 100. %, And all iron can be recovered on the higher mass side.
- An example of a method based on the above-described concept is a method of applying a magnetic force to a centrifugal separation using a swirl of an air current or a water flow.
- different types of mixed powders are dispersed in an air flow or water flow, and the air flow or water flow swirls to form a flow path that applies centrifugal force to the powder, and the ferromagnetic material is magnetized in the direction of the centrifugal force.
- one or more magnetic field generators are arranged along the flow path so that centrifugal force and magnetic force act on the ferromagnetic material.
- the heterogeneous mixed powder containing the ferromagnetic material is conveyed by a fluid (air flow or water flow), thereby making the heterogeneous mixed powder dispersed.
- a fluid air flow or water flow
- the dispersion effect is large simply by administering the different types of mixed powder into the water stream.
- the fluid is an air current
- the dispersion state is realized by using a diffusion plate or diffusion compressed air.
- the shearing force acts on the transport particles (mixed powders of different types) due to the turbulent flow effect in the fluid (air flow or water flow) during transport, realizing a single separated state where aggregation is solved.
- the present invention has made it possible to dramatically improve the separation efficiency of the ferromagnetic component by applying the magnetic force only to the ferromagnetic component together with the magnetic force.
- the present invention has the following features.
- a ferromagnetic separation device for separating a ferromagnetic material from a heterogeneous mixed powder containing a ferromagnetic material, wherein an air flow or a water flow in which the heterogeneous mixed powder is dispersed is swirled to dissimilar mixed powder
- a separator for separating a ferromagnetic material, wherein centrifugal force and magnetic force are applied.
- the magnetic force acting only on the ferromagnetic material is caused to act in the direction of the centrifugal force.
- the separation accuracy of the ferromagnet is greatly improved, and the ferromagnet can be separated more efficiently than in the conventional case where the ferromagnet is separated by magnetic separation.
- the ferromagnetic material can be recycled in large quantities and at high speed.
- FIG. 1 is a diagram showing Embodiment 1 of the present invention.
- FIG. 2 is a diagram showing Embodiment 2 of the present invention.
- FIG. 3 is a diagram showing Embodiment 3 of the present invention.
- FIG. 4 is a diagram showing Embodiment 4 of the present invention.
- FIG. 5 is a diagram showing a variation of the fourth embodiment of the present invention.
- FIG. 6 is a diagram showing another variation of Embodiment 4 of the present invention.
- FIG. 7 is a diagram showing Example 1 of the present invention.
- FIG. 8 is a diagram showing the basic concept of the present invention.
- FIG. 9 is a diagram showing a problem of the prior art (general magnetic sorting).
- the ferromagnetic material is separated from the mixed powder containing the ferromagnetic material, as in the case of separating iron from atomized iron slag.
- a method of obtaining a mixed powder containing different types of iron will be described by taking as an example the case of atomizing iron slag.
- the first method of atomization is mechanical pulverization.
- the mechanical pulverization of iron slag is performed by roughly crushing with a rough crusher such as a Hanmark crusher or jaw crusher and then for ball atomization, ball mill, rod mill, jet mill, pin mill (for milling). pin mill).
- the second atomization method is thermal pulverization (heat treatment pulverization).
- the iron slag is heated to about 1000 to 1300 ° C. and then slowly cooled.
- a heterogeneous mixed powder (a mixture of ferromagnetic particles and nonmagnetic particles) containing a ferromagnetic material can be obtained.
- particles that can be separated by appropriate magnetic separation may be regarded as ferromagnetic particles, and the particles other than the ferromagnetic particles may be regarded as substantially non-magnetic particles.
- the separation of the ferromagnetic particles from the heterogeneous mixed powder (mixture of ferromagnetic particles and nonmagnetic particles) containing the ferromagnetic material obtained as described above is performed.
- the ferromagnetic particles have a larger mass than the non-magnetic particles.
- the direction of the magnetic force may be appropriately changed, for example, the position of the magnetic field generator is set inside the swirl flow path with reference to the following embodiment.
- Embodiment 1 of the present invention is shown in FIG.
- the ferromagnetic separator 11 includes a different kind of mixed powder (ferromagnetic particles).
- Cylindrical swirl in which a fluid (airflow or water stream) carrying a mixture of 1 and nonmagnetic particles 2 swirls to apply a centrifugal force to the ferromagnetic particles 1 and the nonmagnetic particles 2
- a flow path 12 and a magnetic field generator 13 disposed at a plurality of locations along the cylindrical swirl flow path 12 are provided so that the ferromagnetic particles 1 receive a magnetic force in the direction of the centrifugal force.
- cylindrical swirl flow path 12 a generally known cyclone separator can be used.
- it may be a swirling channel having a shape similar to that.
- the magnetic field generator 13 uses a permanent magnet or an electromagnet.
- the magnetic field may be generated at a plurality of locations along the cylindrical swirl flow path 12, and the larger the number, the greater the effect. For example, about 2 to 6 locations are arranged.
- the strength of the magnetic field may be selected from about 100 G (Gauss) to 20000 G (Gauss) depending on the separated particle size.
- the different kind mixed powder (mixture of the ferromagnetic particles 1 and the non-magnetic particles 2) is conveyed by a fluid (air flow or water flow). Therefore, the mixed powder of different types is in a dispersed state. In other words, the shear force acts on the mixed powders of different types due to the turbulent effect of the fluid during conveyance, realizing a single separated state in which aggregation is solved.
- the fluid flowing through the cylindrical swirl flow path 12 swirls to apply a centrifugal force to the ferromagnetic particles 1 and the non-magnetic particles 2, and a magnetic field generator 13 in the same direction as the centrifugal force acts.
- a magnetic force acts on the ferromagnetic particles 1.
- the ferromagnetic particles 1 and the non-magnetic particles 2 in a single separated state move to the outside of the swirl by centrifugal force, and finally come into contact with the wall 12a of the cylindrical swirl flow path 12 and are captured.
- the magnetic force is selectively applied only to the ferromagnetic particles 1 due to the magnetic force from the magnetic field generator 13 acting on the centrifugal force.
- the ferromagnetic particles 1 Since the ferromagnetic particles 1 have a large mass, the acting centrifugal force becomes large, so that the ferromagnetic particles 1 are likely to approach the wall 12 a of the cylindrical swirl flow path 12. On the other hand, since the non-magnetic particles 2 have a small mass, the acting centrifugal force is small, and therefore, the non-magnetic particles 2 are positioned relatively on the central side of the cylindrical swirling flow path 12.
- the ferromagnetic particles 1 on which both centrifugal force and magnetic force (16) act are decelerated in contact with the walls of the flow path (state 1a), and are provided at the lower part of the cylindrical swirl flow path 12. It is separated and collected in the weight side collection box 14 (state 1b).
- the non-magnetic particles 2 on which only the centrifugal force (15) acts are carried on the fluid as they are and discharged from the upper part of the cylindrical swirl flow path 12 to the light side (state 2a).
- the centrifugal force is determined by the flow velocity and the swirl diameter only by normal centrifugation, and the separation particle size is determined. For this reason, if the flow rate is increased in order to increase the separation / recovery amount of the ferromagnetic particles 1 captured by the wall 12a, the separation / recovery amount of the non-magnetic particles 2 including the ferromagnetic particles 1 also increases. The recovery concentration (separation accuracy) of the ferromagnetic particles 1 is not improved. On the other hand, in the first embodiment, the recovery amount of the ferromagnetic particles 1 can be improved by adjusting the strength of the magnetic field, so that the recovery concentration of the ferromagnetic particles 1 can be improved. It becomes.
- FIG. 2 A second embodiment of the present invention is shown in FIG.
- the basic concept of the second embodiment is the same as that of the first embodiment.
- a swirl flow path 22 using a spiral pipe is used, and gas is used as the fluid.
- the fluid in this case, the airflow
- the spiral piping swirl flow path 22 and the magnetic field generators 23 arranged at a plurality of locations along the spiral piping swirl flow path 22 are provided so that the ferromagnetic particles 1 receive a magnetic force in the direction of the centrifugal force. .
- the magnetic field generator 23 uses a permanent magnet or an electromagnet.
- the magnetic field may be generated at a plurality of locations along the spiral piping swirl flow path 22, and the larger the number, the greater the effect. For example, about 2 to 6 locations are arranged.
- the strength of the magnetic field may be selected from about 100 G (Gauss) to 20000 G (Gauss) depending on the separated particle size.
- the different types of mixed powder (mixture of the ferromagnetic particles 1 and the non-magnetic particles 2) is conveyed by an air flow.
- the mixed powder becomes dispersed. That is, a shearing force acts on the mixed powder of different types due to the turbulent effect of the air flow during conveyance, and a single separated state in which aggregation is solved is realized.
- the airflow flowing through the spiral piping swirl passage 22 swirls and centrifugal force acts on the ferromagnetic particles 1 and the nonmagnetic particles 2, and the magnetic field generator 23 extends in the same direction as the centrifugal force acts.
- a magnetic force acts on the ferromagnetic particles 1.
- the ferromagnetic particles 1 and the non-magnetic particles 2 that are in a single separated state move to the outside of the swirl due to centrifugal force, and finally come into contact with the wall 22a of the spiral piping swirl flow path 22 and are captured.
- the magnetic force is selectively applied only to the ferromagnetic particles 1 due to the magnetic force from the magnetic field generator 23 acting on the centrifugal force.
- the ferromagnetic particles 1 on which both the centrifugal force and the magnetic force (26) act are decelerated in contact with the walls of the flow path (state 1c), and are provided at the outlet of the spiral piping swirl flow path 22.
- the non-magnetic particles 2 separated and collected in the collection box 24 (in the state 1d) and subjected only to the centrifugal force (25) are transported as they are on the air stream (in the states 2c and 2d).
- the centrifugal force is determined by the flow velocity and the swirl diameter only by normal centrifugation, and the separation particle size is determined. For this reason, if the flow rate is increased in order to increase the separation / recovery amount of the ferromagnetic particles 1 trapped by the wall 22a, the separation / recovery amount of the non-magnetic particles 2 including the ferromagnetic particles 1 also increases. The recovery concentration of the ferromagnetic particles 1 is not improved.
- the recovery amount of the ferromagnetic particles 1 can be improved by adjusting the strength of the magnetic field, so that the recovery concentration of the ferromagnetic particles 1 can be improved. It becomes.
- a liquid may be used as the fluid.
- Embodiment 3 of the present invention is shown in FIG.
- the magnetic field generator can adjust the magnitude of the magnetic flux density acting on the space through which the ferromagnetic particles pass (the magnetic flux density in the ferromagnetic particle passage space).
- the size of is repeated to be larger and smaller at regular intervals.
- first electromagnet 301 to fifth electromagnet 305 are arranged as the magnetic field generators 13 and 23. Has been.
- the ferromagnetic material when electromagnets are used as the magnetic field generators 13 and 23, the ferromagnetic material attracted and adhered to the wall of the magnetic field generation unit by repeating excitation (ON) and non-excitation (OFF) of the electromagnet at regular intervals.
- the body particles 1 can be removed (1e) at the time of non-excitation.
- FIG. 3B magnetic field operation schedule
- the magnitude of the magnetic flux density in the space passing through the ferromagnetic particles is repeated at certain intervals by repeating excitation (ON) and non-excitation (OFF) of the electromagnet at certain intervals.
- excitation ON
- non-excitation OFF
- it is not limited to complete de-excitation (OFF).
- the magnitude of the magnetic flux density in the ferromagnetic particle passage space may be repeatedly increased and decreased every predetermined period. Good. The same applies to the following forms and examples.
- the electromagnet may be AC driven for the same effect.
- the frequency is arbitrary, depending on the characteristics of the electromagnet and the driving device, the magnetic field strength may be insufficient in the high frequency region. Therefore, in the case of an electromagnet having about 1000 turns with a driving power source of about 2 kW, about 50 Hz. And it is sufficient.
- a driving power source of about 2 kW, about 50 Hz.
- several electromagnets can always generate a sufficiently large magnetic field at a certain moment.
- the same may be performed using permanent magnets as the magnetic field generators 13 and 23.
- a mechanism capable of adjusting the position of the permanent magnet is provided, and the position of the permanent magnet is moved closer to or away from the wall of the magnetic field generation unit, so that the magnetic flux density in the ferromagnetic particle passage space is large. And the magnitude of the magnetic flux density can be repeated at regular intervals.
- the excitation and de-excitation periods do not have to be the same length, and the excitation and de-excitation periods may be different for each electromagnet.
- the magnetic field generator has a storage means for storing an operation schedule as shown in FIG. 3B, for example, and the magnetic field generator according to the schedule. It is preferable to have control means for controlling (for example, controlling the current flowing through each electromagnet or controlling the position of each permanent magnet).
- FIGS. 1 A fourth embodiment of the present invention is shown in FIGS.
- the magnitude of the magnetic flux density in the ferromagnetic particle passage space is repeatedly increased and decreased at regular intervals.
- the magnetic flux density is reduced in a state where a fluid (water flow, air flow) in which different types of mixed powders are dispersed flows at a predetermined flow velocity, the ferromagnetic particles in which the adhesion force due to the magnetic force stops working.
- the fluid will soar into the fluid and be collected on the lightweight side of the centrifuge.
- the fourth embodiment has a configuration in which the flow rate of the fluid (water flow, air flow) in which the different types of mixed powders are dispersed is once reduced, and then the magnetic flux density in the ferromagnetic particle passage space is reduced. I have to.
- the magnetic flux density in the ferromagnetic particle passage space is increased (returned to the original size) before the flow velocity of the fluid (water flow, airflow) is increased again (returned to the original size). Is prepared.
- excitation is turned on before fluid is turned on again.
- the fluid is turned on after the excitation is turned on.
- a threshold value is provided for the flow velocity of the fluid, and the fluid flow velocity is equal to or higher than the threshold value. It is also possible to turn on, turn off the fluid when the fluid flow rate is less than the threshold value, and turn off the fluid before turning off the fluid.
- a threshold value is also provided for excitation, and excitation ON and excitation OFF (including a case where excitation is not equal to the threshold value but not excitation) are determined based on the threshold value.
- the excitation may be turned off after turning it off.
- switching between the fluid ON and the fluid OFF can be performed by adjusting the thrust of the fluid (pump, blower) or adjusting the opening of the damper provided in the fluid flow path.
- the fourth embodiment even if the braking force due to the magnetic force is less likely to act on the ferromagnetic particles by reducing the size of the magnetic flux density in the ferromagnetic particle passage space, Since the fluid force to be reduced is reduced, the ferromagnetic particles are prevented from flying into the fluid, and the ferromagnetic particles are reliably recovered on the weight side of the centrifuge.
- the ferromagnetic separation device controls the magnetic field generator according to the storage means for storing the operation schedule (fluid and magnetic field) and the schedule.
- Control means for example, controlling the current flowing through each electromagnet, or controlling the position of each permanent magnet, and controlling the flow velocity of the fluid according to the schedule (for example, controlling the thrust and damper opening of the aforementioned pump or the like) )
- Control means for example, controlling the current flowing through each electromagnet, or controlling the position of each permanent magnet
- controlling the flow velocity of the fluid according to the schedule for example, controlling the thrust and damper opening of the aforementioned pump or the like
- the ferromagnetic particles 1 when the ferromagnetic particles 1 are separated (centrifugated) from the different types of mixed powder containing the ferromagnetic particles 1, they act only on the ferromagnetic particles 1.
- the magnetic force is applied in the direction of centrifugal force. For this reason, the separation accuracy of the ferromagnetic particles 1 is remarkably improved, and the ferromagnetic particles 1 can be separated efficiently as compared with the conventional case of separating by magnetic separation. As a result, the ferromagnetic material can be recycled in large quantities and at high speed.
- both gas and liquid are suitable as the fluid.
- a water flow in the case where many fine powders of 30 microns or less are contained, it is preferable to use a water flow.
- the present invention there are no particular limitations on the type and particle size of the ferromagnetic material or non-magnetic material, and the blending ratio in the different types of mixed powder.
- the present invention is not particularly limited as long as it is a powder that can be subjected to centrifugation.
- ferromagnetic particles are separated and removed from a mixture of ferromagnetic particles (iron) and nonmagnetic particles (slag), Non-magnetic particles (slag) were collected.
- Steel slag iron average: about 10 to 20% by mass
- the apparatus used was the ferromagnetic separator 11 shown in FIG.
- a threshold value is set for the flow rate of the fluid.
- the fluid is turned on when the flow rate of the fluid is 5 m / s or more.
- the state of less than 5 m / s was defined as fluid OFF.
- the 2000G state is excitation ON
- the excitation stop state is excitation OFF.
- the excitation is turned off after the fluid is turned off.
- the order of fluid ON and excitation ON was the same as in FIG.
- a conventional centrifugal separator without a magnetic field generator is used to change a ferromagnetic particle from a mixture of ferromagnetic particles (iron) and nonmagnetic particles (slag). (Iron content) was separated and removed to recover non-magnetic particles (slag).
- the apparatus configuration of the comparative example was the same as that of the ferromagnetic separator 11 shown in FIG. 1 except for the magnetic field generator.
- the mixing ratio of the ferromagnetic particles (iron) to the non-magnetic particles (slag) in the light-weight side recovery unit was 0.5% by mass
- the present invention example In this case, the rate at which the ferromagnetic particles (iron) are recovered on the light side is greatly reduced, and the mixing ratio of the ferromagnetic particles (iron) to the non-magnetic particles (slag) on the light side is 0% by mass.
- the separation efficiency improved dramatically by 2%.
- the present invention it is possible to remarkably improve the separation accuracy when separating a ferromagnetic material from a heterogeneous mixed powder containing a ferromagnetic material, and to perform separation in a large amount and at a high speed. Therefore, it is possible to increase the efficiency of recovery / recycling of ferromagnetic and non-ferromagnetic components from different mixtures.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
- Combined Means For Separation Of Solids (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
Description
本発明の実施形態1を図1に示す。
本発明の実施形態2を図2に示す。この実施形態2は、上記の実施形態1と基本的な考え方は同じである。 ただし、実施形態1における円筒形状の旋回流路12に替えて、螺旋配管による旋回流路22を用い、流体として気体を用いている。
本発明の実施形態3を図3に示す。
本発明の実施形態4を図4~図6に示す。
1a 壁に捕捉された強磁性体粒子
1b 回収された強磁性体粒子
1c 壁に捕捉された強磁性体粒子
1d 捕捉され分離・回収された強磁性体粒子
1e 捕捉(堆積)が解消された強磁性体粒子
2 非磁性体粒子
2a 排出された非磁性体粒子
2c 気流に搬送されている非磁性体粒子
2d 気流に搬送されている非磁性体粒子
11 強磁性体分離装置
12 円筒形状の旋回流路(円筒形状旋回流路)
12a 円筒形状旋回流路の壁
13 磁場発生装置
14 重量側回収ボックス
21 強磁性体分離装置
22 螺旋配管による旋回流路(螺旋配管旋回流路)
22a 螺旋配管旋回流路の壁
23 磁場発生装置
24 回収ボックス
100 従来の磁力選別装置
101 磁性粒子
102 非磁性粒子
103 異種混合粉体の供給
104 非磁着側回収部
105 磁着側回収部
106a 粒子の浮き現象
106b 粒子が浮き状態から外れたもの
107 粒子の抱き込み現象
108 粒子の凝集現象
109 粒子の静電付着
110 磁石
111 異種混合粉体
301 第1電磁石
302 第2電磁石
303 第3電磁石
304 第4電磁石
305 第5電磁石
T 質量差分離位置
Claims (5)
- 強磁性体を含んだ異種混合粉体から強磁性体を分離するための強磁性体の分離装置であって、
異種混合粉体を分散させた気流あるいは水流が旋回して異種混合粉体に遠心力を作用させる流路と、
前記遠心力の向きに強磁性体が磁力を受けるように前記流路に沿って1箇所以上配設された磁場発生装置と
を備え、強磁性体に遠心力と磁力が作用するようにしている、強磁性体の分離装置。 - 磁場発生装置が、強磁性体が通過する空間に作用する磁束密度の大きさを調節可能な構成を備えている、請求項1に記載の強磁性体の分離装置。
- 磁場発生装置が、強磁性体が通過する空間に作用する磁束密度の大きさを一定期間ごとに大小を繰り返すように構成されている、請求項2に記載の強磁性体の分離装置。
- 分離室に導く異種混合粉体を分散させた気流あるいは水流の流速を小さくした後に、磁束密度の大きさを小さくする、請求項3に記載の強磁性体の分離装置。
- 気流あるいは水流の流速を大きくする前に、磁束密度の大きさを大きくする、請求項4に記載の強磁性体の分離装置。
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CN109663665A (zh) * | 2019-01-14 | 2019-04-23 | 山东省物化探勘查院 | 螺旋式实验室磁性铁自动电磁选仪及磁选方法 |
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JP5246515B2 (ja) * | 2009-12-18 | 2013-07-24 | 株式会社日立プラントテクノロジー | 廃水処理装置 |
US9370782B2 (en) | 2011-12-12 | 2016-06-21 | Osaka University | Method and apparatus for separation of mixture |
DE102012002528B4 (de) * | 2012-02-09 | 2017-04-20 | Akai Gmbh & Co. Kg | Verfahren und Vorrichtung zur Absonderung aller nichtmagnetischen Bestandteile aus einem Gemenge von Metallschrott zur Gewinnung von reinem Eisenschrott |
US9016477B2 (en) * | 2012-03-19 | 2015-04-28 | Mid-American Gunite, Inc. | Method and system for processing slag material |
IN2015MN00483A (ja) * | 2012-10-16 | 2015-09-11 | Jfe Steel Corp | |
KR102084241B1 (ko) * | 2013-05-16 | 2020-03-03 | 대우조선해양 주식회사 | 배관 감육 방지방법 및 그 시스템 |
CN104658737B (zh) * | 2013-11-22 | 2018-07-06 | 海洋王(东莞)照明科技有限公司 | 磁铁分离装置 |
WO2018112509A1 (en) * | 2016-12-20 | 2018-06-28 | Cyclomag Pty Limited | Planar magnetic separator |
WO2019102355A1 (en) * | 2017-11-21 | 2019-05-31 | Dh Technologies Development Pte. Ltd. | 3-d mixing and particle delivery via movable electromagnets assemblies |
KR102237818B1 (ko) * | 2019-09-02 | 2021-04-09 | 한국에너지기술연구원 | 듀얼 코일을 이용한 전자기 유도 사이클론 |
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JPS53138582A (en) * | 1977-05-10 | 1978-12-04 | Nippon Steel Corp | Device for separating dust including magnetic particles |
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