Power supply control method for electromagnetic column concentrator for fine particle iron ore concentration

Abstract

The present disclosure provides a power-on control method for an electromagnetic column-type concentrator for fine particle iron ore concentration, comprising: in the mth power-on period, simultaneously applying constant direct current and / or demagnetizing current to all coils in the first preset power-on coil group, the first preset power-on coil group comprising a first power-on coil and a second power-on coil, the first power-on coil being any one of all coils, and the second power-on coil being a coil located below and adjacent to the first power-on coil; in the m+1th power-on period, taking the second power-on coil in the mth power-on period as the first power-on coil in the first preset power-on coil group in the current power-on period, determining the second power-on coil in the current power-on period according to the first power-on coil, and simultaneously applying constant direct current and / or demagnetizing current to all coils in the adjusted first preset power-on coil group. The present disclosure solves the problem of magnetic flux inclusion while concentrating and sorting.

Description

Technical Field

[0001] This disclosure relates to the field of mineral processing technology, and in particular to an electrical control method, storage medium, and electronic equipment for an electromagnetic column-type fine-grained iron ore refining machine. Background Technology

[0002] Electromagnetic column separators have been widely used in the iron and silica reduction processes of iron ore beneficiation plants, playing a crucial role in ensuring the production of high-quality iron concentrate. Traditional electromagnetic column separators are effective for beneficiating conventional-sized iron ore (approximately 90% 0.074mm). However, with the deepening and widespread mining of iron ore, more and more finely intercalated iron ore particles are entering the grinding and beneficiation process. To achieve sufficient liberation of fine magnetite and gangue, iron ore beneficiation plants generally employ fine grinding technology to reduce the grinding fineness. Some iron ores even need to be ground to a minimum of -0.023mm (90%) to achieve individual liberation of iron ore particles. As the grinding particle size of iron ore decreases, the coercivity and remanence of the iron ore particles gradually increase. The remanence causes a large number of fine iron ore particles to agglomerate together to form magnetic bundles. These magnetic bundles are mechanically mixed with a large number of fine gangue and poor intergrowths. Even when the magnetic field is removed, the magnetic bundles will not disappear. Due to the strong remanence of the magnetic bundles formed by the attraction of fine iron ore particles, which are mixed with gangue and poor intergrowths, the traditional electromagnetic column separator has a poor refining effect on fine iron ore particles. Summary of the Invention

[0003] The purpose of this disclosure is to provide an energizing control method, storage medium, and electronic equipment for an electromagnetic column-type concentrator for refining fine-grained iron ore, in order to solve the problem in the prior art where the magnetic flux inclusions of gangue and poor intergrowths formed by the strong remanent magnetic attraction of fine-grained iron ore result in poor refining effect on fine-grained magnetite.

[0004] The embodiments of this disclosure adopt the following technical solution: an energizing control method for an electromagnetic column-type concentrator for refining fine-grained iron ore, the electromagnetic column-type concentrator including a column-type iron ore concentrator cylinder and a plurality of coils arranged sequentially from top to bottom around the outer peripheral sidewall of the column-type iron ore concentrator cylinder, the energizing control method including: in the m-th energizing cycle, simultaneously energizing all coils in a first preset energizing coil group, wherein the first preset energizing coil group includes a first energizing coil and a second energizing coil, the first energizing coil being any one of the coils, the second energizing coil being a coil located below and adjacent to the first energizing coil, and when the first energizing coil is the lowest coil among all coils, the second energizing coil is the highest coil among all coils; in the m-th energizing cycle, energizing all coils in a first preset energizing coil group simultaneously, the first preset energizing coil group including a first energizing coil and a second energizing coil, the first energizing coil being any one of the coils, the second energizing coil being a coil located below and adjacent to the first energizing coil, and when the first energizing coil is the lowest coil among all coils, the second energizing coil is the highest coil among all coils; in the m-th energizing cycle, energizing all coils in a first preset energizing coil group including a column-type iron ore concentrator cylinder and a plurality of coils arranged sequentially from top to bottom around the outer peripheral sidewall of the column-type iron ore concentrator cylinder; in the m-th energizing cycle, energizing all coils in a first preset energizing coil group simultaneously, the first energizing coil being a first energizing coil and a second energizing coil being a coil located below and adjacent to the first energizing coil, and when the first energizing coil is the lowest In m+1 energizing cycles, according to a preset demagnetizing logic sequence, the second energizing coil in the m-th energizing cycle is used as the first energizing coil in the first preset energizing coil group in the current energizing cycle. The second energizing coil in the first preset energizing coil group in the current energizing cycle is determined based on the first energizing coil. Energizing is then applied to all coils in the adjusted first preset energizing coil group simultaneously. When the coil to be energized is the first or second coil located at the top of all the coils, a constant DC current is input to the coil to be energized. When the coil to be energized is any coil other than the first and second coils, a demagnetizing current is input to the coil to be energized. The demagnetizing current is a current whose maximum current value changes with time and oscillates with unequal amplitude according to a sinusoidal curve.

[0005] This disclosure also provides a storage medium storing a computer program that, when executed by a processor, implements the steps of the above-described power-on control method for an electromagnetic column-type fine-grained iron ore refining machine.

[0006] This disclosure also provides an electronic device, including at least a memory and a processor. The memory stores a computer program, and when the processor executes the computer program in the memory, it implements the steps of the above-described power-on control method for an electromagnetic column-type fine iron ore refining machine.

[0007] The beneficial effects of this embodiment are as follows: by improving the energizing control method of the coil on the outer side of the electromagnetic column separator, during the energizing process of the coil from top to bottom, it is possible to achieve both refining and separation, and reduce the residual magnetism of magnetic particles during the separation process. This can reduce the magnetic flux caused by agglomeration, thereby reducing mechanical inclusions and effectively improving the refining effect of fine iron ore. Attached Figure Description

[0008] To more clearly illustrate the technical solutions in one or more embodiments of this specification or in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this specification. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0009] Figure 1 This is a schematic diagram of the electromagnetic column-type concentrator for refining fine-grained iron ore according to the first embodiment of this disclosure;

[0010] Figure 2 This is a flowchart of the power-on control method for an electromagnetic column-type fine iron ore refining machine in the first embodiment of this disclosure;

[0011] Figure 3 This is a schematic diagram of the decay oscillation period and current envelope of the demagnetizing current in the first embodiment of this disclosure;

[0012] Figure 4 This is a schematic diagram of the coordinated demagnetization and energization of adjacent coils in the first embodiment of this disclosure;

[0013] Figure 5 This is a schematic diagram of the coil design in the first embodiment of this disclosure;

[0014] Figure 6 This is a magnetic field strength cloud map in the first embodiment of this disclosure;

[0015] Figure 7 This is a graph showing the uniform magnetic field strength in the first embodiment of this disclosure;

[0016] Figure 8 This is a schematic diagram of the structure of the electronic device in the third embodiment of this disclosure. Detailed Implementation

[0017] To enable those skilled in the art to better understand the technical solutions in one or more embodiments of this specification, the technical solutions in one or more embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this specification, and not all of the embodiments. Based on one or more embodiments of this specification, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this document.

[0018] Electromagnetic column separators have been widely used in the iron and silica reduction processes of iron ore beneficiation plants, playing a crucial role in ensuring the production of high-quality iron concentrate. Traditional electromagnetic column separators are effective for beneficiating conventional-sized iron ore (approximately 90% 0.074mm). However, with the deepening and widespread mining of iron ore, more and more finely intercalated iron ore particles are entering the grinding and beneficiation process. To achieve sufficient liberation of fine magnetite and gangue, iron ore beneficiation plants generally employ fine grinding technology to reduce the grinding fineness. Some iron ores even need to be ground to a minimum of -0.023mm (90%) to achieve individual liberation of iron ore particles. As the grinding particle size of iron ore decreases, the coercivity and remanence of the iron ore particles gradually increase. The remanence causes a large number of fine iron ore particles to agglomerate together to form magnetic bundles. These magnetic bundles are mechanically mixed with a large number of fine gangue and poor intergrowths. Even when the magnetic field is removed, the magnetic bundles will not disappear. Due to the strong remanence of the magnetic bundles formed by the attraction of fine iron ore particles, which are mixed with gangue and poor intergrowths, the traditional electromagnetic column separator has a poor refining effect on fine iron ore particles.

[0019] To address the aforementioned issues, the first embodiment of this disclosure provides an energization control method for an electromagnetic column separator used for refining fine-grained iron ore. This method, combined with the coil design of the electromagnetic column separator, reduces the residual magnetism of the iron ore during the sorting process by applying different currents to coils at different positions and implementing a specific demagnetization logic sequence, thereby reducing mechanical inclusions and improving the iron ore refining effect.

[0020] Specifically, the structural schematic diagram of the electromagnetic column-type separator applied by the power-on control method in this embodiment is shown below. Figure 1 As shown, it includes at least a column-type iron ore concentrate drum 10 and a plurality of coils arranged sequentially from top to bottom around the outer peripheral sidewall of the column-type iron ore concentrate drum 10. The number of coils is typically determined based on the drum size. Figure 1 Taking eight coils as an example, from top to bottom they are C1 to C8. It should be noted that... Figure 1 Any one of the multiple coils shown should actually be a loop coil that wraps around the cylinder once. Figure 1 Only one schematic cross-section of the coil is shown. It should be understood that... Figure 1The image shown is a simplified structural diagram of an electromagnetic column separator, used only to illustrate the positional relationship between the coil and the cylinder, and does not represent the structure of an electromagnetic column separator in an actual industrial environment. Furthermore, the electromagnetic column separator should also include at least multiple PLC control units (not shown in the figure) for independently controlling the energization of each coil. Each PLC control unit corresponds one-to-one with a coil to achieve independent control of each coil. Additionally, the electromagnetic column separator should also include a feeding device, a discharging device, a power supply system, or other necessary devices or systems for realizing the functions of the electromagnetic column separator. These can be specifically configured and implemented with reference to existing technologies; this embodiment does not provide specific details.

[0021] Combination Figure 1 The coil setup shown is as follows. Figure 2 A flowchart of the power-on control method in this embodiment is shown, which includes at least steps S10 and S20:

[0022] S10, in the m-th energizing cycle, all coils in the first preset energizing coil group are energized simultaneously. The first preset energizing coil group includes a first energizing coil and a second energizing coil. The first energizing coil is any one of the coils. The second energizing coil is the coil located below and adjacent to the first energizing coil. When the first energizing coil is the lowest coil among all the coils, the second energizing coil is the highest coil among all the coils.

[0023] S20, in the (m+1)th energizing cycle, according to the preset demagnetizing logic sequence, the second energizing coil in the mth energizing cycle is used as the first energizing coil in the first preset energizing coil group in the current energizing cycle, and the second energizing coil in the first preset energizing coil group in the current energizing cycle is determined based on the first energizing coil, and all coils in the adjusted first preset energizing coil group are energized simultaneously.

[0024] In fact, the method in this embodiment should be a continuous and cyclical method, although Figure 2The diagram illustrates two steps, which essentially represent the demagnetization logic sequence used to adjust the coils to be energized within two adjacent energizing cycles. This sequence adjusts the energized coils over time, achieving both sorting and demagnetization of the iron ore. Specifically, the m-th energizing cycle can be any energizing cycle in the sorting process, and the (m+1)-th energizing cycle is the next cycle after the m-th cycle. The entire energizing process is continuous and cyclical. During this cycle, the currently energized coils are switched sequentially according to a preset demagnetization logic sequence. Alternatively, if the m-th energizing cycle is considered the current energizing cycle, and the (m+1)-th cycle is the next cycle to be energized, then after the current energizing cycle is completed, the next cycle to be energized is used as the current energizing cycle for energizing control. The energized coils in this next cycle are switched sequentially from top to bottom according to the preset demagnetization logic sequence based on the current energizing cycle.

[0025] Specifically, during the m-th energizing cycle, all coils in the first preset energizing coil group are energized simultaneously. In this embodiment, a preset energizing coil group mainly includes two adjacent coils. By energizing the two adjacent coils simultaneously, a magnetic field with uniform magnetic field strength can be formed to achieve a good demagnetization effect on the residual magnetism of the iron ore. The first preset energizing coil group includes a first energizing coil and a second energizing coil. The first energizing coil is any one of the coils. The second energizing coil is the coil located below and adjacent to the first energizing coil. However, if the first energizing coil is the lowest coil among all the coils (i.e., C8), then the corresponding second energizing coil is the highest coil among all the coils (i.e., C1).

[0026] In the (m+1)th energizing cycle, following a preset demagnetizing logic sequence, the second energizing coil from the m-th energizing cycle is used as the first energizing coil in the first preset energizing coil group for the current energizing cycle. Based on the newly determined first energizing coil in the current energizing cycle, its corresponding second energizing coil is determined, forming the first preset energizing coil group for the (m+1)-th energizing cycle. Then, all coils in the adjusted first preset energizing coil group are simultaneously energized. In effect, as the energizing cycle enters the next cycle, the coil requiring energization shifts downwards with one coil as a reference. This causes the magnetic field formed within the cylinder to also shift downwards. The iron ore distributed within the magnetic field moves with the changing position of the magnetic field. As the energizing cycle continues to change, the iron ore moves from top to bottom during the sorting process, completing the sorting.

[0027] by Figure 1Taking the example of eight coils C1 to C8 arranged from top to bottom on the outside of the cylinder, in the first energizing cycle, coils C1 and C2 are energized simultaneously, with coil C1 acting as the first energizing coil and C2 as the second energizing coil. In the second energizing cycle, according to the preset demagnetizing logic sequence, coil C2 acts as the first energizing coil and coil C3 as the second energizing coil. This continues in the third energizing cycle, with coils C3 and C4 energized simultaneously, until the eighth cycle. At this time, coils C8 and C1 are energized. The magnetic field generated by C8 continues to act on the iron ore near the bottom of the cylinder, while the magnetic field generated by C1 begins to sort and control the iron ore near the top of the cylinder, marking the end of the previous sorting process and the beginning of the next sorting process.

[0028] In the process of sorting by controlling the energizing sequence of the coils, this embodiment reduces the residual magnetism of magnetic particles by applying different currents to coils at different positions. Specifically, when the coil to be energized is the first or second coil located at the top of all coils, a constant DC current is input to the coil to be energized; when the coil to be energized is any coil other than the first and second coils, a demagnetizing current is input to the coil to be energized, wherein the demagnetizing current is a current whose maximum current value changes with time in a sinusoidal manner with unequal amplitude decay. Corresponding to Figure 1 In the case of the coil shown, when it is necessary to energize C1 and C2, a constant DC current is input to them. When it is necessary to energize C3 to C8, a demagnetizing current with unequal amplitude damping oscillation characteristics is input to reduce the internal remanence of the iron ore in a magnetic field with varying intensity.

[0029] In this embodiment, the maximum value of the demagnetizing current changes with time in a sinusoidal, oscillating manner with varying amplitudes, such as... Figure 3 As shown, its entire damped oscillation curve is symmetrically distributed along I=0, and one damped oscillation period T of the demagnetizing current is... j This is the time it takes for the demagnetizing current to decay from its maximum value to 1% of the maximum current in the entire oscillation curve. When one decaying oscillation period T... j At the end, the same damped oscillation cycle begins again from the maximum current value, and so on until the coil energizing cycle ends. Figure 4 The current envelope curve of the demagnetizing current is shown, as follows: Figure 4 As shown, in this embodiment, the envelope curve formed by connecting the current extrema within a complete unequal amplitude oscillation decay cycle of the demagnetizing current is linear. The envelope curve of the positive decay curve current extrema within the first cycle is as follows:

[0030]

[0031] Among them, I max T represents the maximum current value of the demagnetizing current within a non-uniform amplitude oscillation decay period. j For the damped oscillation period, I is a function used to characterize the extreme envelope of the positively damped curve current within the first period. Furthermore, the extreme envelope of the negatively damped curve current is symmetrical to the extreme envelope of the positively damped curve current, and so on for the remaining periods, shifting sequentially from the first period.

[0032] In some embodiments, to achieve a better demagnetizing effect, the demagnetizing current can be limited to oscillating and decaying more than 40 times per second. However, it should be noted that one oscillation decay refers to... Figure 3 The process of the demagnetizing current oscillating from one current peak to the next, as shown, can effectively improve the demagnetizing effect of iron ore by setting the number of oscillation decays per second to more than 40. The specific method to achieve the oscillation decay of the demagnetizing current more than 40 times per second can be implemented based on existing methods, and this embodiment does not impose specific limitations.

[0033] In some embodiments, the maximum current value of the demagnetizing current within a complete unequal amplitude oscillation decay cycle is determined based on the detected value of the coercivity Hc of the sorted fine-grained iron ore. To more efficiently reduce the remanence of the iron ore particles, this embodiment preferably uses a magnetic field H generated by the maximum demagnetizing current value that is 10 to 16 times the coercivity Hc of the fine-grained iron ore. Given that the coercivity of the fine-grained iron ore is known, the maximum current value I can be deduced from the required magnetic field H. max The value, in Taking the electromagnetic separator for separating fine-grained iron ore as an example, the maximum current value I for fine-grained iron ore with a content of -0.045mm is... max The preferred current is 4-7A, with the maximum current value I for 90% fine-grained iron ore containing -0.023mm particles. max 8 to 12A are preferred.

[0034] When the coil is energized in practice using a preset demagnetization logic sequence, the duration T of each energizing cycle is... d The setting can be based on the decay oscillation period T of the demagnetizing current. j The preferred method is to set the duration T of each coil's energizing cycle. d Greater than the decaying oscillation period T j 20 times that, that is, T d >20*T j Within one energizing cycle, the magnetic field of the demagnetizing current achieves a sufficient reduction of residual magnetism in fine-grained iron ore.

[0035] In practical implementation, in order to improve sorting and demagnetization efficiency, combined with the design of the number of coils, the coils in two different preset energizing groups can be energized simultaneously within one energizing cycle. For example, in the m-th energizing cycle, while energizing the first preset energizing coil group, all coils in the second preset energizing coil group are also energized simultaneously, so that the second magnetic field formed by the second preset energizing coil group has the same magnetic field uniformity characteristics as the first magnetic field formed by the first preset energizing coil group, and there is a non-magnetic field region between the first magnetic field and the second magnetic field.

[0036] Specifically, in the m-th energizing cycle, all coils in the second preset energizing coil group are simultaneously energized. The second preset energizing coil group includes a third energizing coil and a fourth energizing coil. The third energizing coil is located below the second energizing coil and is separated from the second energizing coil by two coils. The fourth energizing coil is located below and adjacent to the third energizing coil. When the third energizing coil is the lowest coil among all coils, the fourth energizing coil is the highest coil among all coils. In the (m+1)-th energizing cycle, according to a preset demagnetization logic sequence, the fourth energizing coil in the m-th energizing cycle is used as the third energizing coil in the second preset energizing coil group in the current energizing cycle. The fourth energizing coil in the second preset energizing coil group in the current energizing cycle is determined based on the third energizing coil, and all coils in the adjusted second preset energizing coil group are simultaneously energized.

[0037] Combination Figure 1 The coil setup shown indicates that the second preset energized coil group is separated from the first preset energized coil group by two coils. For example, if the first preset energized coil group includes C1 and C2, then the second preset energized coil group includes C4 and C5; if the first preset energized coil group includes C2 and C3, then the second preset energized coil group includes C5 and C6, and so on. Therefore, a complete cycle Tz is equivalent to four energizing cycles Td. The energizing sequence within the cycle Tz can be (C1, C2, C5, C6), (C2, C3, C6, C7), (C3, C4, C7, C8), or (C1, C4, C5, C8). During the sorting process, the energizer is cyclically switched on and off in the above order. After two cycles, the top-to-bottom sorting of iron ore can be completed during the demagnetization process. Figure 4 As shown.

[0038] In practical implementation, the multiple coils set outside the cylinder are parallel to each other and spaced at a certain distance. When using the electromagnetic column-type separator, the iron ore to be separated is injected into the opening at the top of the cylinder. The magnetic field generated by energizing the coils achieves the separation and demagnetization of the iron ore. To achieve a uniform magnetic field and ensure efficient demagnetization of a large number of iron ore particles simultaneously, this embodiment sets the spacing l between two adjacent coils to be the same as the center radius r of the coil thickness, i.e., l = r. When two adjacent coils are energized simultaneously, a uniform magnetic field can be generated. The corresponding coil design schematic diagram, magnetic field strength cloud diagram, and uniform magnetic field strength curve are shown below. Figures 5 to 7 As shown.

[0039] It should be noted that the number of coils set outside the cylinder should preferably be 8 or more. Especially when two sets of preset energized coils are energized at the same time in one energizing cycle, two sorting demagnetizing magnetic fields with uniform magnetic field characteristics can be formed at the same time inside the cylinder, thereby improving the sorting efficiency.

[0040] This embodiment utilizes a specific coil configuration of an electromagnetic column-type fine separator combined with an energizing control method. During the top-to-bottom energizing process of the equipment coil, it simultaneously achieves fine separation and reduces the residual magnetism of magnetic particles during the separation process. This reduces magnetic flux caused by agglomeration, thereby reducing mechanical inclusions and effectively improving the fine-grained iron ore refining effect.

[0041] Based on the same inventive concept, a second embodiment of this disclosure provides a storage medium that can be installed in the control device, control system, or control platform of the electromagnetic column-type sorting machine of the first embodiment of this disclosure. Specifically, it is a computer-readable medium storing a computer program. When executed by a processor, the computer program implements the method provided in any embodiment of this disclosure, including the following steps S21 and S22:

[0042] S21, in the m-th energizing cycle, all coils in the first preset energizing coil group are energized simultaneously. The first preset energizing coil group includes a first energizing coil and a second energizing coil. The first energizing coil is any one of the coils. The second energizing coil is the coil located below and adjacent to the first energizing coil. When the first energizing coil is the lowest coil among all the coils, the second energizing coil is the highest coil among all the coils.

[0043] S22, in the (m+1)th energizing cycle, according to the preset demagnetizing logic sequence, the second energizing coil in the mth energizing cycle is taken as the first energizing coil in the first preset energizing coil group in the current energizing cycle, and the second energizing coil in the first preset energizing coil group in the current energizing cycle is determined based on the first energizing coil, and all coils in the adjusted first preset energizing coil group are energized simultaneously; wherein, when the coil to be energized is the first or second coil located at the top of all coils, a constant DC current is input to the coil to be energized; when the coil to be energized is any coil other than the first and second coils, a demagnetizing current is input to the coil to be energized, and the demagnetizing current is a current whose maximum current value changes with time and oscillates in a sinusoidal manner with unequal amplitude.

[0044] The computer program is further executed by the processor in the following steps: In the m-th energizing cycle, all coils in the second preset energizing coil group are simultaneously energized, wherein the second preset energizing coil group includes a third energizing coil and a fourth energizing coil. The third energizing coil is located below the second energizing coil and is separated from the second energizing coil by two coils. The fourth energizing coil is located below the third energizing coil and is adjacent to the third energizing coil. When the third energizing coil is the lowest coil among all coils, the fourth energizing coil is the highest coil among all coils. In the (m+1)-th energizing cycle, according to a preset demagnetization logic sequence, the fourth energizing coil in the m-th energizing cycle is used as the third energizing coil in the second preset energizing coil group in the current energizing cycle. The fourth energizing coil in the second preset energizing coil group in the current energizing cycle is determined based on the third energizing coil, and all coils in the adjusted second preset energizing coil group are simultaneously energized.

[0045] Specifically, the demagnetizing current oscillates and decays more than 40 times per second.

[0046] Specifically, the duration of each energizing cycle is greater than 20 times the decay oscillation period of the demagnetizing current, wherein the decay oscillation period of the demagnetizing current is the time it takes for the demagnetizing current to decay from the maximum current value to 1% of the maximum current value.

[0047] Specifically, the maximum value of the demagnetizing current is based on the coercivity H of the fine-grained iron ore. C The detection value is determined so that the magnetic field H generated by the maximum current value of the demagnetizing current is 10 to 16 times the coercivity Hc of the fine-grained iron ore.

[0048] Specifically, the number of coils is greater than or equal to 8.

[0049] This embodiment utilizes a specific coil configuration of an electromagnetic column-type fine separator combined with an energizing control method. During the top-to-bottom energizing process of the equipment coil, it simultaneously achieves fine separation and reduces the residual magnetism of magnetic particles during the separation process. This reduces magnetic flux caused by agglomeration, thereby reducing mechanical inclusions and effectively improving the fine-grained iron ore refining effect.

[0050] The third embodiment of this disclosure provides an electronic device, which may be the control device, control system, or control platform of the electromagnetic column-type sorting machine of the first embodiment of this disclosure, as shown in the schematic diagram below. Figure 8 As shown, the system includes at least a memory 100 and a processor 200. The memory 100 stores a computer program, and the processor 200 implements the methods provided in any embodiment of this disclosure when executing the computer program in the memory 100. Exemplarily, the steps of the electronic device computer program are as follows: S31 and S32:

[0051] S31, in the m-th energizing cycle, all coils in the first preset energizing coil group are energized simultaneously. The first preset energizing coil group includes a first energizing coil and a second energizing coil. The first energizing coil is any one of the coils. The second energizing coil is the coil located below and adjacent to the first energizing coil. When the first energizing coil is the lowest coil among all the coils, the second energizing coil is the highest coil among all the coils.

[0052] S32, in the (m+1)th energizing cycle, according to the preset demagnetizing logic sequence, the second energizing coil in the mth energizing cycle is used as the first energizing coil in the first preset energizing coil group in the current energizing cycle, and the second energizing coil in the first preset energizing coil group in the current energizing cycle is determined based on the first energizing coil, and all coils in the adjusted first preset energizing coil group are energized simultaneously; wherein, when the coil to be energized is the first or second coil located at the top of all coils, a constant DC current is input to the coil to be energized; when the coil to be energized is any coil other than the first and second coils, a demagnetizing current is input to the coil to be energized, and the demagnetizing current is a current whose maximum current value changes with time and oscillates in a sinusoidal manner with unequal amplitude.

[0053] The processor also executes the following computer program stored in memory: In the m-th energizing cycle, simultaneously energize all coils in the second preset energizing coil group, wherein the second preset energizing coil group includes a third energizing coil and a fourth energizing coil, the third energizing coil is located below the second energizing coil and separated from the second energizing coil by two coils, the fourth energizing coil is located below the third energizing coil and adjacent to the third energizing coil, and when the third energizing coil is the lowest coil among all coils, the fourth energizing coil is the highest coil among all coils; In the (m+1)-th energizing cycle, according to a preset demagnetization logic sequence, the fourth energizing coil in the m-th energizing cycle is used as the third energizing coil in the second preset energizing coil group in the current energizing cycle, and the fourth energizing coil in the second preset energizing coil group in the current energizing cycle is determined based on the third energizing coil, and simultaneously energize all coils in the adjusted second preset energizing coil group.

[0054] Specifically, the demagnetizing current oscillates and decays more than 40 times per second.

[0055] Specifically, the duration of each energizing cycle is greater than 20 times the decay oscillation period of the demagnetizing current, wherein the decay oscillation period of the demagnetizing current is the time it takes for the demagnetizing current to decay from the maximum current value to 1% of the maximum current value.

[0056] Specifically, the maximum current value of the demagnetizing current is determined based on the detected value of the coercivity HC of the fine-grained iron ore, so that the magnetic field H generated by the maximum current value of the demagnetizing current is 10 to 16 times the coercivity Hc of the fine-grained iron ore.

[0057] Specifically, the number of coils is greater than or equal to 8.

[0058] This embodiment utilizes a specific coil configuration of an electromagnetic column-type fine separator combined with an energizing control method. During the top-to-bottom energizing process of the equipment coil, it simultaneously achieves fine separation and reduces the residual magnetism of magnetic particles during the separation process. This reduces magnetic flux caused by agglomeration, thereby reducing mechanical inclusions and effectively improving the fine-grained iron ore refining effect.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure, and are not intended to limit them. Although this disclosure has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this disclosure.

Claims

1. A power-on control method for an electromagnetic column concentrator for fine particle iron ore cleaning, characterized by, The electromagnetic column type concentrator comprises a column type iron ore concentrating cylinder and a plurality of coils arranged in sequence from top to bottom around the outer peripheral sidewall of the column type iron ore concentrating cylinder, and the energization control method comprises the following steps: In the mth energization cycle, all coils in a first preset energization coil group are simultaneously energized, wherein the first preset energization coil group comprises a first energization coil and a second energization coil, the first energization coil is any one of all the coils, and the second energization coil is a coil located below and adjacent to the first energization coil; when the first energization coil is the lowermost coil among all the coils, the second energization coil is the uppermost coil among all the coils; In the m+1th energization cycle, according to a preset demagnetization logic sequence, the fourth energization coil in the mth energization cycle is taken as the third energization coil in the second preset energization coil group in the current energization cycle, the fourth energization coil in the second preset energization coil group in the current energization cycle is determined according to the third energization coil, and all coils in the adjusted second preset energization coil group are simultaneously energized. Wherein, when the coil to be energized is the first coil or the second coil located at the top of all the coils, a constant direct current is input to the coil to be energized; When the coil to be energized is any one of the coils other than the first coil and the second coil among all the coils, a demagnetizing current is input to the coil to be energized, and the demagnetizing current is a current whose maximum current value attenuates and oscillates according to a similar sinusoidal curve over time.

2. The power supply control method according to claim 1, characterized by, Further comprising: In the mth energization cycle, all coils in a second preset energization coil group are simultaneously energized, wherein the second preset energization coil group comprises a third energization coil and a fourth energization coil, the third energization coil is located below the second energization coil and spaced two coils from the second energization coil, and the fourth energization coil is a coil located below and adjacent to the third energization coil; when the third energization coil is the lowermost coil among all the coils, the fourth energization coil is the uppermost coil among all the coils; In the m+1th energization cycle, according to a preset demagnetization logic sequence, the fourth energization coil in the mth energization cycle is taken as the third energization coil in the second preset energization coil group in the current energization cycle, the fourth energization coil in the second preset energization coil group in the current energization cycle is determined according to the third energization coil, and all coils in the adjusted second preset energization coil group are simultaneously energized.

3. The power supply control method according to claim 1, wherein The demagnetizing current oscillates and attenuates more than 40 times in one second.

4. The power supply control method according to claim 1, wherein The duration of each energization cycle is greater than 20 times the attenuation and oscillation period of the demagnetizing current, wherein the attenuation and oscillation period of the demagnetizing current is the time taken for the demagnetizing current to attenuate from the maximum current value to 1% of the maximum current value.

5. The power supply control method according to claim 1, wherein The maximum current value of the demagnetizing current is determined based on a detected value of the coercive force Hc of the fine-particle iron ore, so that a magnetic field H generated by the maximum current value of the demagnetizing current is 10 to 16 times the coercive force Hc of the fine-particle iron ore. C of the fine-particle iron ore, so that a magnetic field H generated by the maximum current value of the demagnetizing current is 10 to 16 times the coercive force Hc of the fine-particle iron ore.

6. The power supply control method according to claim 1, wherein The spacing between two adjacent coils is the same as the center radius of the coil thickness.

7. The power supply control method according to any one of claims 1 to 6, characterized by, The number of coils is greater than or equal to 8.

8. A storage medium storing a computer program, characterized by The computer program, which is executed by a processor, implements the steps of the energization control method of the electromagnetic column concentrator for fine-particle iron ore concentration according to any one of claims 1 to 6.

9. An electronic device comprising at least a memory, a processor, said memory having stored thereon a computer program, characterized in that, The processor, when executing the computer program on the memory, implements the steps of the energization control method of the electromagnetic column concentrator for fine-particle iron ore concentration according to any one of claims 1 to 6.

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