WO2023151347A1 - Machine de concentration électromagnétique de type à excitation partitionnée et son procédé d'enrichissement - Google Patents

Machine de concentration électromagnétique de type à excitation partitionnée et son procédé d'enrichissement Download PDF

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Publication number
WO2023151347A1
WO2023151347A1 PCT/CN2022/134457 CN2022134457W WO2023151347A1 WO 2023151347 A1 WO2023151347 A1 WO 2023151347A1 CN 2022134457 W CN2022134457 W CN 2022134457W WO 2023151347 A1 WO2023151347 A1 WO 2023151347A1
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WIPO (PCT)
Prior art keywords
coil
coils
tail
control
selection
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PCT/CN2022/134457
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English (en)
Chinese (zh)
Inventor
冉红想
王晓明
魏红港
孙鹏健
吕沛超
冯天然
郝业飞
赵瑞敏
孟玮
刘国荣
张明伟
殷武
高自然
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北矿机电科技有限责任公司
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Priority to AU2022440049A priority Critical patent/AU2022440049A1/en
Publication of WO2023151347A1 publication Critical patent/WO2023151347A1/fr

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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
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
    • 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

Definitions

  • the invention relates to the technical field of iron ore sorting equipment, in particular to a zone-excited electromagnetic concentrator.
  • the mined ore generally needs to be finely ground and then processed through the beneficiation process before it can be used as raw material for blast furnace ironmaking.
  • High-quality iron concentrate is of great significance for ironmaking.
  • the magnetic separation column has an obvious effect on increasing the iron content and reducing the silicon content of iron ore.
  • the magnetic system coil When the magnetic separation column is working, the magnetic system coil generates an alternating magnetic field that sometimes does not exist, and passes through the rotating and rising flushing water flow. When the coil is energized, the magnetic particles are clustered under the action of the magnetic field. When the coil is powered off, the magnetic clusters become loose, and the gangue and poor intergrowth are washed out under the action of the rotating upward water flow, and move to the top under the action of the drag force of the water flow.
  • the overflow forms tailings.
  • the magnetic aggregates are discharged from the bottom concentrate port to become concentrate.
  • the application of this equipment has greatly improved the quality of iron ore concentrate, but there are still some problems in the following aspects in terms of its equipment structure and working performance: the tailing effect is insufficient, and the electrified coil of the magnetic separation column has a magnetic field cavity , especially the uppermost excitation coil, without the balance column in the middle of the lower coil to occupy the empty magnetic field area, the magnetic field cavity area is larger, and the magnetic field cavity area is easy to cause the escape of magnetic particles and be discharged with the tailings. For some minerals, the selection effect is not obvious.
  • the current coils of the existing magnetic separation column are all fed with constant direct current in the same direction, resulting in a single force on the magnetic particles, no movement such as vibration and flipping of the magnetic particles, and it is difficult for the washing water to wash out the gangue and poor intergrowth in the magnetic agglomeration , so that the actual sorting efficiency is low.
  • the coil excitation method of the magnetic separation column is generally energized alternately from top to bottom, which easily causes some ore particles to circulate back and forth between the two coils, neither entering the concentrate or tailings, resulting in the actual separation of the equipment. low efficiency.
  • the purpose of the present invention is to provide a zoned excitation type electromagnetic concentrator.
  • the present invention provides a partition excitation type electromagnetic concentrator, the partition excitation type electromagnetic concentrator includes a sorting cylinder, the bottom of the sorting cylinder is provided with a concentrate port; the ore feeder, the The mine feeder is arranged on the top of the sorting cylinder; the water separator, the water divider includes a water spray pipe, and the water spray pipe is provided at the end of the inner wall of the separation cylinder near the A water outlet, the water spray pipe can spray water tangentially to the inner cylinder wall of the sorting cylinder.
  • the partition excitation type electromagnetic concentrator also includes: an inner coil for controlling the tail, the inner coil for controlling the tail is installed on the outer wall of the ore delivery pipe of the mine feeder; an outer coil for controlling the tail, the outer coil for controlling the tail is arranged On the outer wall of the tail control area of the sorting cylinder; the sweeping coil, the sweeping coil is arranged on the outer wall of the sweeping area of the sorting cylinder; the selection coil, the selection coil is arranged on the sorting On the outer wall of the selected area of the cylinder, the inner coil for tail control, the outer coil for tail control, the scanning coil and the selected coil are respectively connected to the electric control cabinet.
  • the tail control inner coil includes coil B1 and coil B2
  • the tail control outer coil includes coil A1 and coil A2
  • the coil A1 and coil B1 form a first group of coils
  • the coil A2 and coil B2 form
  • the electric control cabinet controls the alternate power supply of the first group of coils and the second group of coils.
  • the energization form of the tail control inner coil is positive constant direct current
  • the energization form of the tail control outer coil is negative constant direct current
  • the sweeping coil and the selecting coil are arranged on the outer wall of the sorting cylinder in a top-down order, and the sweeping coil and the selecting coil are arranged outside the control tail below the coil.
  • the scanning coils include coils C1, coils C2, and coils C3 arranged in sequence from top to bottom, and the selected coils include coils C4, coil C5, coil C6, coil C7, coils arranged in sequence from top to bottom Coil C8, the electric control cabinet sequentially turns on and off the coils C1-C8 alternately at intervals of two coils from top to bottom, and the power-on sequence is according to coils C1, C4, C7 ⁇ coils C2, C5, C8 ⁇ Coils C3, C6 ⁇ coils C1, C4, C7 ⁇ ... are energized in sequence.
  • the energization form of the scanning coil is a positive constant direct current;
  • the energization form of the coils C4, C6, and C8 in the selection coil is a negative low-frequency pulsating direct current, and the coil C5 in the selection coil ,
  • the power-on form of C7 is positive low-frequency pulsating direct current.
  • the winding directions of the tail-controlling inner coil, the tail-controlling outer coil, the sweeping coil and the selected coil are all consistent, that is, the tail-controlling inner coil, the tail-controlling outer coil, and the tail-controlling outer coil
  • the direction of the magnetic lines of force generated when the same direction of current is passed through the scanning coil and the selection coil is the same, and the direction of the magnetic force lines generated by the reverse current is opposite.
  • two layers of water spray pipes are provided, and the water outlets of the two layers of water spray pipes are respectively arranged corresponding to the upper and lower parts of the selection coil.
  • an outer coil protective cover is provided on the outside of the tail control outer coil, the sweep coil and the selection coil, the outer coil protective cover is made of non-magnetic material, and the outer coil protects The hood has vents.
  • an inner coil protective cover is provided outside the inner coil of the control tail, and the inner coil protective cover is made of non-magnetic material, and the inner coil protective cover completely seals the inner coil of the control tail in a closed space .
  • the present invention provides an ore beneficiation method using the partition excitation electromagnetic concentrator according to the present invention for ore beneficiation.
  • the technical scheme of the invention can realize good tail control effect.
  • a superimposed magnetic field can be formed in the flow space, avoiding the magnetic field cavity area generated when only a single coil is installed, so that the overflow tailings can all pass through the magnetic force area, and the capture of magnetic particles can be increased. Increase the probability of recovery and avoid the loss of concentrate caused by the magnetic field cavity.
  • the scanning coil is supplied with steady and constant direct current, the excited magnetic field is stable, the scanning effect is good, there is no vibration and flipping phenomenon during the movement of the magnetic particles, and the scanning efficiency is high. Adjacent selected coils pass reverse pulsating direct current, and the magnetic particles vibrate and turn over continuously during the movement in the selected coils.
  • the vibration and flip of the magnetic particles achieve a good selection effect.
  • the operation mode of the control energization of the sweeping coil and the selection coil makes the magnetic particles move downward steadily and smoothly during the sorting process, avoiding the magnetic attraction of the magnetic particles upward during the movement process, and can only move downward sequentially. High sorting efficiency.
  • Fig. 1 is the structural representation of the electromagnetic concentrating machine of the embodiment of the present invention
  • Fig. 2 is a schematic diagram of the cycle power-on and power-off sequence of the scanning coil and the selected coil according to the embodiment of the present invention
  • Fig. 3 is a schematic diagram of the energization sequence of the tail control inner coil and the tail control outer coil according to the embodiment of the present invention
  • Fig. 4 is the current form diagram of the positive low-frequency pulsating direct current passed through the coils C5 and C7 in the selected coil of the embodiment of the present invention
  • Fig. 5 is the current form diagram of the negative low-frequency pulsating direct current passed through the coils C4, C6, and C8 in the selected coil of the embodiment of the present invention
  • Fig. 6 is the current form diagram of the forward steady direct current passed through the inner coil of the tail control in the embodiment of the present invention.
  • Fig. 7 is the current form diagram of the negative steady direct current passed through the outer coil of the tail control in the embodiment of the present invention.
  • Fig. 8 is the current form diagram of the forward steady direct current passed through the scanning coil according to the embodiment of the present invention.
  • Fig. 9 is the distribution of magnetic lines of force when a single outer coil for tail control is set
  • Fig. 10 is the distribution of magnetic field lines of nested tail control coils with different energization directions according to the embodiment of the present invention.
  • Fig. 11 is a schematic diagram of the flipping of magnetic particles caused by different energization directions of coils C4-C8 according to the embodiment of the present invention.
  • first and second are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as “first” or “second” may explicitly or implicitly include one or more of said features.
  • plural means two or more, unless otherwise specifically defined.
  • installation”, “connection” and “connection” should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be It can be directly connected, or indirectly connected through an intermediary, or it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.
  • a partition excitation type electromagnetic concentrator includes a control tail inner coil 1, a tail control outer coil 2, a sweep coil 3, a selection coil 4, a mine feeder 5, a sorting cylinder 6, a sorting Water tank 8, outer coil shield 9 and electric control cabinet 11.
  • the ore feeder 5 is arranged in the upper part inside the sorting drum 6 .
  • the bottom of the sorting drum 6 is provided with a concentrate port 10 .
  • the tail control outer coil 2 is arranged in the tail control area of the sorting cylinder 6, and the tail control inner coil 1 is nested in the center of the sorting tube 6 in the tail control area of the sorting tube 6.
  • Tail control inner coil 1 is installed on the outer wall of the ore delivery pipe of mine feeder 5, and tail control inner coil 1 includes coil B1 and coil B2; tail control outer coil 2 is installed on the outer wall of sorting cylinder 6, and tail control outer coil 2 includes coil A1 and coil A2.
  • the coil A1 of the tail control inner coil 1 and the coil B1 of the tail control outer coil 2 are the first group of coils, and the coil A2 of the tail control inner coil 1 and the coil B2 of the tail control outer coil 2 are the second group of coils.
  • the electric control cabinet 11 controls two groups of coils to alternately energize and de-energize (as shown in Figure 3 ), and the energization time is adjustable, preferably, the energization time is 8T.
  • 8T is the time required for the coil magnetic field to complete a complete scan and selection of magnetic particles, that is, the theoretical movement time of magnetic particles from C1 to C8, as shown by the longest oblique arrow in Figure 2, where T is the coil C1 ⁇ The duration of each power-on and power-off of C8.
  • the sweeping coil 3 is arranged in the sweeping area of the sorting cylinder 6, which includes coil C1, coil C2, and coil C3;
  • the selection coil 4 is arranged in the selection area of the sorting cylinder 6, and the selection coil 4 includes coil C4, coil C5 , coil C6, coil C7, coil C8, coils C1-C8 are arranged on the outer wall of the sorting cylinder 6 in order from top to bottom, and coils C1-C8 are arranged below the outer coil 2 for tail control.
  • the electric control cabinet 11 alternately turns on and off power to the coils C1-C8 at intervals of two coils sequentially from top to bottom.
  • the coils C1 ⁇ C8 are divided into three groups, the coils C1, C4, and C7 are the third group, the coils C2, C5, and C8 are the fourth group, and the coils C3 and C6 are the fifth group.
  • the coils C1, C2 and C3 of the scanning coil 3 are energized in the form of positive and constant direct current; Pulsating direct current; as shown in Figure 4, the coils C5 and C7 pass forward low-frequency pulsating direct current; the electric control cabinet can control the duration of each power-on and power-off of coils C1-C8 to be T, and the magnitude of the energizing current is I.
  • Electric control cabinet 11 of the present invention can adopt PLC controller to control tail inner coil 1, control tail outer coil 2, scanning coil 3 and selected coil 4 to control, and the outside of sorting cylinder 6 is provided with junction box 13, through The junction box 13 realizes the connection between the electric control cabinet 11 and the inner coil 1 of the tail control, the outer coil 2 of the tail control, the scanning coil 3 and the selection coil 4 .
  • Tail control inner coil 1, tail control outer coil 2, sweep coil 3 and selected coil 4 have the same winding direction, that is, as long as the coils are energized in the same direction, tail control inner coil 1, tail control outer coil 2, sweep coil 3 and the selected coil 4 have the same direction of the magnetic force lines generated when the same direction of current is passed, and the direction of the magnetic force lines is opposite when the electrification direction is opposite.
  • the water separator 8 includes a water spray pipe 7 .
  • the water spray pipe 7 is made of nonmagnetic stainless steel, and the water spray pipe 7 is provided with a water outlet near the end of the inner cylinder wall of the sorting cylinder 6, and the water spray pipe 7 can flow toward the inner cylinder wall of the sorting cylinder 6. Perform tangential spraying. Two layers of water spray pipes 7 are provided, and the positions of the water outlets of the water spray pipes 7 correspond to the upper and lower parts of the selection coil 4 respectively. Swirl water spray.
  • the swirling water spray causes the direction of the flux chain formed by the magnetic particles to deviate, forming an angle with the direction of the magnetic field, thereby reducing the mechanical strength inside the flux chain, making it easier to break up the flux chain, and thus easier to break out of the flux chain attached tailings.
  • the outside of the control tail outer coil 2, the scanning coil 3 and the selection coil 4 are provided with an outer coil protective cover 9, the outer coil protective cover 9 is made of non-magnetic material, and the outer coil protective cover 9 is provided with an air vent, and the outer coil protective cover 9
  • the coil protective cover 9 can play a protective role to the tail control outer coil 2, the sweeping coil 3 and the selected coil 4.
  • An inner coil protective cover 12 is arranged on the outer side of the tail control inner coil 1 .
  • the inner coil protective cover 12 is made of non-magnetic material.
  • the inner coil protective cover 12 completely seals the inner coil 1 of the control tail in the confined space.
  • the inner coil protective cover 12 cooperates with the outer wall of the ore delivery pipe of the ore feeder 5 to completely seal the inner coil 1 of the control tail in the confined space. In order to avoid the control tail inner coil 1 from being eroded by the slurry.
  • the invention can realize good tail control effect.
  • a nested tail control coil with a tail control inner coil 1 and a tail control outer coil 2 is arranged in the upper tail control area of the sorting cylinder 6, and the inner tail control coil 1 and the tail control outer coil 2 are connected in different directions.
  • Direct current so that a superimposed magnetic field can be formed in the overcurrent space (as shown in FIG. 10 ), thereby avoiding the magnetic field hole region of a single coil magnetic field (as shown in FIG. 9 ).
  • Such setting can make the overflow tailings all pass through the magnetic force area, increase the probability of collecting magnetic particles, and avoid the loss of concentrate caused by the magnetic field cavity.
  • the magnetic particles are distributed stably and flow smoothly during the sorting process.
  • the coils C1-C8 in the scanning area and the selected area are energized alternately by two coils (as shown in Figure 2). Since the two coils are spaced apart, when the energized coils are changed downward, only the upper part of the energized coils will be energized.
  • the magnetic particles have no magnetic particles in the lower part, so there is no upward magnetic attraction for the magnetic particles during the movement process, and they can only move downward in sequence, and the sorting efficiency is high.
  • the energized coil can not only attract the magnetic particles in the upper adjacent coil, but also attract the magnetic particles in the lower adjacent coil, it is easy to cause the problem of confusion in the direction of movement of the magnetic particles (for example, when a coil is energized at intervals),
  • the technical solution of the present invention can solve the problem of the chaotic movement direction of the magnetic particles through the arrangement of energizing two coils at intervals, and the magnetic particles can only move downward sequentially, so the sorting efficiency is high.
  • the present invention can realize a good selection effect, and the electrified current of the selection coils (C4-C8) is a low-frequency pulsating direct current.
  • the low-frequency pulsating direct current makes the magnetic particles adsorbed inside the coil vibrate all the time. During the vibration of the magnetic particles, the washing water can easily wash away the gangue and poor intergrowth in the magnetic particles. Due to the different energization directions of two adjacent energized coils (as shown in Figure 4 and Figure 5), the directions of the generated magnetic fields are also different, so the magnetic particles are constantly turned over during the movement from coil C4 to C8 in the sorting cylinder 6 (As shown in FIG.
  • the selected coil of the present invention can achieve the following beneficial effects: when the coil is energized, the magnetic particles are vibrated and turned over.

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Abstract

L'invention concerne une machine de concentration électromagnétique de type à excitation partitionnée, comprenant un cylindre de séparation, une bobine intérieure de contrôle des résidus et une bobine extérieure de contrôle des résidus. La bobine intérieure de contrôle des résidus est montée sur une paroi extérieure d'un tuyau de transport de minerai d'un dispositif d'alimentation en minerai ; la bobine extérieure de contrôle des résidus est disposée sur une paroi extérieure d'une région de contrôle des résidus du cylindre de séparation ; les bobines de balayage sont disposées sur une paroi extérieure d'une région de balayage du cylindre de séparation ; les bobines de concentration sont disposées sur une paroi extérieure d'une région de concentration du cylindre de séparation ; et la bobine intérieure de contrôle des résidus, la bobine extérieure de contrôle des résidus, les bobines de balayage et les bobines de concentration sont respectivement connectées à une armoire de commande électrique. La bobine interne de contrôle des résidus et la bobine externe de contrôle des résidus peuvent former un champ magnétique superposé dans un espace de débordement, de sorte que tous les résidus de débordement peuvent passer par une région d'action magnétique, que la probabilité de capture des particules magnétiques est accrue et que le problème de fuite des particules magnétiques causé par une région où il n'y a pas de champ magnétique est évité. Le courant continu de même direction est fourni aux bobines de balayage, de sorte que les particules magnétiques ne vibrent pas et ne se retournent pas dans un processus de déplacement, et l'efficacité du balayage est élevée ; et le courant continu pulsé de différentes directions est fourni aux bobines de concentration adjacentes, de sorte que les particules magnétiques vibrent et se retournent continuellement sous l'action du champ magnétique des bobines de concentration, et l'effet de concentration est bon.
PCT/CN2022/134457 2022-02-09 2022-11-25 Machine de concentration électromagnétique de type à excitation partitionnée et son procédé d'enrichissement WO2023151347A1 (fr)

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AU2022440049A AU2022440049A1 (en) 2022-02-09 2022-11-25 Partitioned excitation type electromagnetic concentration machine and beneficiation method thereof

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CN202210121585.7A CN114433349B (zh) 2022-02-09 2022-02-09 一种分区激磁型电磁精选机
CN202210121585.7 2022-02-09

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CN117548227A (zh) * 2024-01-11 2024-02-13 山东华特磁电科技股份有限公司 一种用于干粉物料除杂的除铁器及多级排杂控制系统

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CN114433349B (zh) * 2022-02-09 2024-04-05 北矿机电科技有限责任公司 一种分区激磁型电磁精选机

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DE102008047852A1 (de) * 2008-09-18 2010-04-22 Siemens Aktiengesellschaft Trenneinrichtung zum Trennen eines Gemischs von in einer in einem Trennkanal geführten Suspension enthaltenen magnetisierbaren und unmagnetisierbaren Teilchen
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Publication number Priority date Publication date Assignee Title
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