Self-flowing demagnetizing spiral chute device and control method

Abstract

The present application relates to a self-flowing demagnetization spiral chute device and a control method. The self-flowing demagnetization spiral chute device comprises: a control end, an excitation coil, a spiral chute and a magnetic monitor. The spiral chute is provided with a slurry inlet and a slurry outlet. The magnetic monitor is located at the slurry outlet. The excitation coil is provided at the spiral chute. The control end is connected to the magnetic monitor and the excitation coil. The control end is used to output an excitation current to excite the excitation coil, generate a periodic oscillating attenuation magnetic field, and form a demagnetization area with different magnetic field strengths. After the slurry reaches the spiral chute through the slurry inlet for driving force-free inclined flow demagnetization, it flows out from the slurry outlet. The magnetic monitor is used to perform discharge magnetic detection and feed back electrical signals to the control end. The control end also adjusts the output excitation current according to the electrical signal to maintain the magnetic properties of the slurry within a preset range, thereby improving the demagnetization effect.

Description

Technical Field

[0001] The present application relates to the technical field of mineral processing and demagnetization, and in particular to a self-flowing demagnetization spiral chute device and a control method. Background Art

[0002] When magnetite and other strong magnetic minerals are separated in a magnetic field, in addition to the magnetization of the particles themselves, they will also form agglomerates, and after leaving the magnetic field, some of these agglomerates will remain in the form of agglomerates. This magnetic agglomeration phenomenon not only reduces the efficiency of subsequent grading and screening operations, but also causes gangue minerals to be wrapped and mixed in the magnetic agglomerates, affecting the production indicators of the magnetic separation process. If a reverse magnetic field is applied to the magnetic agglomerates, most of the residual magnetism of the magnetite ore can be removed. This process is called demagnetization (or demagnetization).

[0003] Traditional demagnetizers use tubular straight-through demagnetizers, which form a continuously changing magnetic field based on the principle of electromagnetic induction by winding a conductive coil on the outer tube wall and applying a voltage and current regulating device. When the slurry flows through the tubular straight-through demagnetizer, the demagnetizing magnetic field reduces the remanence of the slurry, achieving the purpose of demagnetization. However, since slurries with different flow rates have different effects under the magnetic field formed by the demagnetizer, the demagnetization effect of the tubular straight-through demagnetizer will be poor. Summary of the invention

[0004] Based on this, it is necessary to provide a self-flowing demagnetization spiral chute device and a control method that can improve the demagnetization effect in order to solve the above problems.

[0005] A self-flowing demagnetization spiral chute device, comprising: a control end, an excitation coil, a spiral chute and a magnetic monitor, wherein the spiral chute is provided with a slurry inlet and a slurry outlet, the magnetic monitor is located at the slurry outlet, the excitation coil is provided at the spiral chute, and the control end is connected to the magnetic monitor and the excitation coil;

[0006] The control end is used to output an excitation current to excite the excitation coil, generate a periodic oscillating attenuation magnetic field, and form demagnetization areas with different magnetic field strengths; after the slurry passes through the slurry inlet and reaches the spiral chute for driving force-free inclined flow demagnetization, it flows out from the slurry outlet; the magnetic monitor is used to perform magnetic detection of the discharge material and feed back an electrical signal to the control end, and the control end also adjusts the output excitation current according to the electrical signal to maintain the slurry magnetism within a preset range.

[0007] In one of the embodiments, the excitation coil is laid flat on the bottom of the spiral chute.

[0008] In one embodiment, the angle between two adjacent passages of the spiral chute is 20° to 30°.

[0009] In one of the embodiments, the excitation coil forms a strong demagnetization area and a weak demagnetization area in sequence along the direction from the slurry inlet to the slurry outlet according to the received excitation current.

[0010] In one of the embodiments, the ratio of the excitation current of the strong demagnetization area to the weak demagnetization area is 1:0.7.

[0011] In one of the embodiments, the preset range is determined according to a magnetic threshold and a preset error margin.

[0012] In one embodiment, the preset range is 0.9 times the magnetic threshold to 1.1 times the magnetic threshold.

[0013] In one of the embodiments, the gravity-flow demagnetization spiral chute device further includes a support rod, and the spiral chute is fixed to the support rod.

[0014] In one embodiment, the control end includes a computer and an excitation control cabinet, the computer is connected to the magnetic force monitor through a signal path, the excitation control cabinet is connected to the computer, and the excitation control cabinet is connected to the excitation coil through an excitation line.

[0015] A method for controlling a self-flowing demagnetization spiral chute is implemented based on the above-mentioned self-flowing demagnetization spiral chute device, and the method comprises:

[0016] Receive the electrical signal fed back by the magnetic monitor; the electrical signal is obtained when the slurry passes through the slurry inlet and reaches the spiral chute for no-driving-force inclined flow demagnetization and then flows out from the slurry outlet, and the magnetic monitor performs discharge magnetic detection;

[0017] The excitation current output to the excitation coil is adjusted according to the electrical signal to maintain the slurry magnetism within a preset range; the excitation current is used to excite the excitation coil to generate a periodic oscillating attenuated magnetic field to form demagnetization areas with different magnetic field strengths.

[0018] The above-mentioned self-flowing demagnetization spiral chute device and control method excite each excitation coil by outputting an excitation current at the control end, generating a periodic oscillating attenuated magnetic field, forming demagnetization areas with different magnetic field strengths, so that the slurry reaches the spiral chute for no-driving force inclined flow demagnetization. The combination of periodic oscillating attenuated current, strong and weak coupling excitation coils, and no-driving force inclined flow can achieve efficient demagnetization of the slurry. In addition, the assembly of discharge magnetic feedback adjustment control can well adapt to the fluctuation of material magnetic difference and improve the demagnetization effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of a gravity-flow demagnetization spiral chute device in one embodiment;

[0020] Figure 2 and Figure 3 A schematic diagram of the spiral chute structure in one embodiment;

[0021] Figure 4 It is a structural schematic diagram of a self-flowing demagnetization spiral chute device in another embodiment;

[0022] Figure 5 A schematic flow chart of a method for controlling a gravity-flow demagnetization spiral chute in one embodiment;

[0023] Figure 6 A schematic diagram of a demagnetization effect monitoring feedback adjustment process in one embodiment;

[0024] Figure 7 A schematic diagram of a periodically decaying excitation current and magnetic field in one embodiment;

[0025] Figure 8 It is a structural block diagram of a self-flow type demagnetization spiral chute control device in one embodiment;

[0026] Fig. 9 FIG. 4 is a diagram showing the internal structure of a computer device in one embodiment.

[0027] Explanation of the reference numerals: 1. Computer; 2. Excitation control cabinet; 3. Excitation connection line; 4. Excitation coil; 5. Spiral chute; 6. Support rod; 7. Slurry inlet; 8. Slurry outlet; 9. Magnetic monitor; 10. Signal path. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0029] It can be understood that the “connection” in the following embodiments should be understood as “electrical connection”, “communication connection”, etc. if the connected circuits, modules, units, etc. have electrical signals or data transmission between each other.

[0030] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" etc. specify the presence of stated features, wholes, steps, operations, components, parts or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts or combinations thereof.

[0031] Iron ore is an important raw material for steel production enterprises. Generally, iron ore with a grade below 50% needs to be beneficiated to improve its grade before it can be smelted and used. The technology of using the magnetic difference of different minerals to separate and enrich minerals is called magnetic separation. Magnetic separation is the most widely used technology for separating magnetic iron ore. In magnetic separation, the material has a higher magnetic susceptibility than the magnetic susceptibility of the material. χ >4.0×10 -5 m 3 / kg minerals are called strong magnetic minerals. 5 A / m weak magnetic field magnetic separator can be recovered, this type of minerals mainly include magnetite, hematite, titanomagnetite, pyrrhotite and zinfe spinel.

[0032] When magnetite and other strong magnetic minerals are separated in a magnetic field, in addition to the magnetization of the particles themselves, they will also form agglomerates, and after leaving the magnetic field, some of these agglomerates will remain in the form of agglomerates. This magnetic agglomeration phenomenon not only reduces the efficiency of subsequent grading and screening operations, but also causes the gangue minerals to be wrapped and mixed in the magnetic agglomerates, affecting the production indicators of the magnetic separation process. If a reverse magnetic field is applied to the magnetic agglomerates, most of the residual magnetism of the magnetite ore can be removed. This process is called demagnetization (or demagnetization). According to the magnetic field excitation principle and characteristics of the demagnetizer, the output power varies greatly, such as harmonic wave type, pulse type, etc. However, in actual mining work, it is found that the application of demagnetizers in ore dressing plants is limited and some of the effects are not ideal.

[0033] At present, the mainstream demagnetizer adopts a tubular straight-through demagnetizer, which forms a continuously changing magnetic field based on the principle of electromagnetic induction by winding a conductive coil on the outer tube wall and applying a voltage and current regulating device. When the slurry flows through the tubular straight-through demagnetizer, the remanent magnetism of the slurry is reduced by the demagnetizing magnetic field to achieve the purpose of demagnetization. However, according to the theory of fluid mechanics and the calculation of the Stokes equation, the flow velocity on the water section of the middle layer of the circular tube is parabolically distributed, and the flow velocity of the slurry is non-uniform. Slurries with different flow rates have different effects under the action of the magnetic field formed by the demagnetizer, resulting in the general demagnetization effect of the tubular straight-through demagnetizer. Based on this, the present application provides a self-flowing demagnetization spiral chute device and control method, which utilizes periodic oscillation attenuation current, strong and weak coupling excitation coils, and a method of inclined flow without driving force to achieve efficient demagnetization of slurry; coupled with the assembly of discharge magnetic feedback regulation control, it can well adapt to the fluctuation of material magnetic difference.

[0034] In one embodiment, Figure 1As shown, a self-flowing demagnetization spiral chute device is provided, including: a control end, an excitation coil 4, a spiral chute 5 and a magnetic monitor 9. The spiral chute 5 is provided with a slurry inlet 7 and a slurry outlet 8. The magnetic monitor 9 is located at the slurry outlet 8. The excitation coil 4 is provided at the spiral chute 5. The control end is connected to the magnetic monitor 9 and the excitation coil 5. The control end is used to output an excitation current to excite the excitation coil 4, generate a periodic oscillating attenuation magnetic field, and form demagnetization areas with different magnetic field strengths. After the slurry reaches the spiral chute 5 through the slurry inlet 7 for no-driving force inclined flow demagnetization, it flows out from the slurry outlet 8. The magnetic monitor 9 is used to perform magnetic detection of the discharge material and feed back an electrical signal to the control end. The control end also adjusts the output excitation current according to the electrical signal to maintain the magnetic properties of the slurry within a preset range.

[0035] Among them, the specific structure of the control end is not unique, and may include one or more controllers. In one embodiment, the control end includes a computer 1 and an excitation control cabinet 2, the computer 1 is connected to the magnetic force monitor 9 through a signal path 10, the excitation control cabinet 2 is connected to the computer 1, and the excitation control cabinet 2 is connected to the excitation coil 4 through an excitation connection line 3. The computer 1 receives the signal fed back by the magnetic force monitor 9, generates a controllable current through the excitation control cabinet 2, and inputs it into the excitation coil 4 with the help of the excitation connection line 3 connected to the excitation control cabinet 2, so as to generate a periodic oscillation attenuation magnetic field. By controlling the excitation current value output to different ports of the excitation coil 4, the magnetic field intensity in the demagnetization area decreases successively along the direction from the slurry inlet 7 to the slurry outlet 8. The periodic oscillation attenuation magnetic field is determined by the current value It, the attenuation period t and the periodic oscillation frequency. For slurry mainly composed of natural magnetite, the demagnetization magnetic field intensity is ensured to be above 48kA / m by adjusting the excitation current value. Specifically, 50Hz alternating current can be used to ensure that the magnetic field changes repeatedly more than 12 times in one cycle.

[0036] Furthermore, the upper limit and lower limit values ​​of the preset range are not unique. In one embodiment, the preset range is determined according to the magnetic threshold value B0 and the preset error margin. It can be understood that the specific values ​​of the magnetic threshold value B0 and the error margin can be set according to actual needs. In this embodiment, the error margin is 0.1 times the magnetic threshold value B0, and the preset range is 0.9 times the magnetic threshold value B0-1.1 times the magnetic threshold value B0. The computer 1 can determine the slurry magnetic property Bt based on the electrical signal fed back by the magnetic monitor 9. If the slurry magnetic property Bt is greater than or equal to 0.9 times the magnetic threshold value B0, and less than or equal to 1.1 times the magnetic threshold value B0, the slurry magnetic property meets the requirements; if the slurry magnetic property Bt is greater than 1.1 times the magnetic threshold value B0, the current value It is increased; if the slurry magnetic property Bt is less than 0.9 times the magnetic threshold value B0, the current value It is reduced.

[0037] The arrangement of the spiral chute 5, the number of exciting coils 4 and the arrangement are not unique. Specifically, Figure 2 and Figure 3 As shown, the spiral chute 5 is spirally designed and vertically arranged, the slurry inlet 7 is located at the top of the spiral chute 5, and the slurry outlet 8 is located at the bottom of the spiral chute 5. The cross section of the spiral chute 5 is a structure with high sides and low middle. The excitation coil 4 is composed of one or more wires. The excitation coil 4 can be arranged on the inner side of the spiral chute 5 or at the bottom of the spiral chute 5. In this embodiment, the excitation coil 4 is arranged flat at the bottom of the spiral chute 5 to form an "S"-shaped loop.

[0038] Furthermore, the specific structure of the spiral chute 5 is not unique and can be designed according to the particle size / density and other properties of the solid particles in different slurries. In one embodiment, the angle between two adjacent passages of the spiral chute 5 is 20° to 30°, so as to avoid the slurry flowing too fast due to a too high angle and the slurry flowing too slowly due to a too low angle, so as to ensure that the slurry can flow at a uniform and stable speed, thereby ensuring the demagnetization effect and improving the demagnetization efficiency.

[0039] In addition, in one embodiment, the gravity-flow demagnetization spiral chute device further comprises a support rod 6, and the spiral chute 5 is fixed to the support rod 6. The spiral chute 5 is fixedly supported by the support rod 6 to ensure that the spiral chute 5 is firmly installed.

[0040] The above-mentioned gravity-flow demagnetization spiral chute device combines periodic oscillation attenuation current, strong-weak coupling excitation coils and inclined flow without driving force, which can achieve efficient demagnetization of slurry. In addition, it is equipped with discharge magnetic feedback adjustment control, which can adapt well to the fluctuation of material magnetic difference and improve the demagnetization effect.

[0041] In one embodiment, the excitation coil 4 forms a strong demagnetization area and a weak demagnetization area in sequence along the direction from the slurry inlet 7 to the slurry outlet 8 according to the received excitation current. Figure 4 As shown, the excitation line 3 is connected to port 3-1, port 3-2 and port 3-3 respectively, port 3-1 is connected to the end of the excitation coil 4 close to the slurry inlet 7, port 3-2 is connected to the middle position of the excitation coil 4, and port 3-3 is connected to the end of the excitation coil 4 close to the slurry outlet 8. Ports 3-1 and 3-2 are connected to the upper half of the excitation coil 4 to form a strong demagnetization area, and ports 3-2 and 3-3 are connected to the lower half of the excitation coil 4 to form a weak demagnetization area. It can be understood that in this embodiment, the demagnetization area is divided into two partitions, the strong demagnetization area and the weak demagnetization area. In other embodiments, the demagnetization area can also be divided into other levels of partitions, which can be set according to actual needs.

[0042] The slurry is fed into the spiral chute 5 from the slurry inlet 7, passes through the strong demagnetization area and the weak demagnetization area in sequence, and flows out through the slurry outlet 8 after demagnetization. The slurry outlet 8 is equipped with a magnetic monitor 9, which can monitor the magnetic value Bt of the slurry online in real time and generate an electrical signal, which is fed back to the computer 1 through the signal path 10.

[0043] It can be understood that different slurries are suitable for different demagnetization magnetic fields. The specific values ​​of the excitation currents in the strong demagnetization area and the weak demagnetization area can be set according to actual needs. In this embodiment, the ratio of the excitation currents in the strong demagnetization area and the weak demagnetization area is 1:0.7, which realizes the step-by-step demagnetization of the slurry. In addition, the attenuation period t and the periodic oscillation frequency of the strong demagnetization area and the weak demagnetization area are the same.

[0044] In one embodiment, a method for controlling a self-flowing demagnetization spiral chute is also provided, which is implemented based on the above-mentioned self-flowing demagnetization spiral chute device, such as Figure 5 As shown, the method includes:

[0045] Step S110: receiving the electric signal fed back by the magnetic monitor. The electric signal is obtained when the slurry passes through the slurry inlet and reaches the spiral chute for no-driving-force inclined flow demagnetization and then flows out from the slurry outlet, and the magnetic monitor performs discharge magnetic detection.

[0046] Step S120: Adjust the excitation current output to the excitation coil according to the electrical signal to maintain the slurry magnetism within a preset range. The excitation current is used to excite the excitation coil to generate a periodic oscillating attenuated magnetic field to form demagnetization areas with different magnetic field strengths.

[0047] It can be understood that the specific implementation of the above-mentioned gravity-flow demagnetization spiral chute control method has been explained in detail in the above-mentioned gravity-flow demagnetization spiral chute device, and will not be repeated here.

[0048] In order to facilitate a better understanding of the above-mentioned gravity-flow demagnetization spiral chute device and control method, a detailed explanation is given below in conjunction with specific embodiments.

[0049] Reference Figure 1 The self-flowing demagnetization spiral chute device includes a computer 1, an excitation control cabinet 2, an excitation connection line 3, an excitation coil 4, a spiral chute 5, a support rod 6, a slurry inlet 7, a slurry outlet 8, a magnetic monitor 9 and a signal path 10. The computer 1 is connected with the excitation control cabinet 2 to form an integrated control end, which receives the signal fed back by the magnetic monitor 9, generates a controllable current through the excitation control cabinet 2, and inputs it into the excitation coil 4 through the excitation connection line 3 connected to the excitation control cabinet 2.

[0050] Reference Figures 1 to 4, the excitation line 3 is connected to the three ports 3-1, 3-2, and 3-3 respectively, and forms a coupled controllable magnetic field with a strong top and a weak bottom with the excitation coil 4. The spiral chute 5 is fixed on the support rod 6, the upper part of the spiral chute 5 is the slurry inlet 7, and the lower part of the spiral chute 5 is the slurry outlet 8. The excitation coil 4 is laid flat on the bottom of the spiral chute 5 to form an "S"-shaped loop.

[0051] Reference Figure 1 The slurry outlet 8 is equipped with a magnetic monitor 9, which can monitor the magnetic value Bt of the slurry online in real time and generate an electrical signal, which is fed back to the computer 1 through the signal path 10. The angle between two adjacent paths of the spiral chute 5 is preferably 20°-30°. The optimal angle can be determined through experiments and calculations based on the particle size / density and other properties of the solid particles in different slurries, and the uniform and stable flow of the slurry is the preferred criterion for judgment.

[0052] Reference Figure 6 The demagnetization effect monitoring feedback adjustment process of the gravity-flow demagnetization spiral chute is as follows: the slurry is fed into the demagnetization chute 5, and the magnetization is performed by controlling the current value It, and then the discharge magnetism Bt is detected. If the slurry magnetism Bt is between 0.9 and 1.1 times the magnetic threshold B0, the slurry demagnetization discharge is completed; if the slurry magnetism Bt is greater than 1.1 times the magnetic threshold B0, the current value It is increased by the feedback control of the previous level; if the slurry magnetism Bt is less than 0.9 times the magnetic threshold B0, the current value It is decreased by the feedback control of the previous level.

[0053] Reference Figure 7 The periodic oscillation attenuation magnetic field is determined by the current value It, the attenuation period t and the periodic oscillation frequency. Different slurries are suitable for different demagnetization magnetic fields. The ratio of the excitation current in the strong and weak demagnetization areas is 1:0.7; the attenuation period t and the periodic oscillation frequency of the two demagnetization areas are the same.

[0054] The demagnetization process is described as follows:

[0055] Step 1: Computer 1 and excitation control cabinet 2 excite the excitation coil 4 by generating a controlled excitation current to generate a periodic oscillating attenuated magnetic field. For slurry mainly composed of natural magnetite, the demagnetization magnetic field strength should be above 48kA / m, using 50Hz alternating current, and ensuring that the magnetic field changes repeatedly for more than 12 times in one cycle.

[0056] Step 2: Slurry with a mass concentration of 30%-40% is fed into the spiral chute 5 through the slurry inlet 7, and demagnetized by a periodic oscillation attenuation magnetic field in a plane uniform flow manner. The time from the slurry entering the spiral chute 5 to leaving the spiral chute 5 for demagnetization should be greater than 0.24s.

[0057] Step three, the demagnetized slurry is discharged through the slurry outlet 8, and during the discharge process, it is evaluated for magnetic properties Bt by the magnetic monitor 9. If the slurry magnetic properties Bt is between 0.9 and 1.1 times the magnetic threshold value B0, it means that the magnetic properties of the slurry demagnetization product are qualified and the slurry can be continuously fed; if the slurry magnetic properties Bt is greater than 1.1 times the magnetic threshold value B0, it is fed back to the previous level control to increase the current value It; if the slurry magnetic properties Bt is less than 0.9 times the magnetic threshold value B0, it is fed back to the previous level control to reduce the current value It.

[0058] Aiming at the technical problems that the tubular straight-through demagnetizer equipment currently used in the mainstream of the ore dressing plant has poor demagnetization effect and lacks a feedback correction control method for the demagnetization effect, this application proposes a self-flowing demagnetization spiral chute device and control method. The slurry is demagnetized in the spiral chute 5 in a way of flowing on an inclined surface without driving force. The excitation coil 4 is laid flat on the bottom of the spiral chute 5 to form an "S"-shaped loop, forming a demagnetization magnetic field with strong and weak coupling up and down. The computer 1, the excitation control cabinet 2 and the magnetic force monitor 9 form an automatic control and feedback adjustment demagnetization mechanism, and the generated periodic oscillation attenuation demagnetization magnetic field can be controlled by the current value It, the current period t and the periodic oscillation frequency. By using the periodic oscillation attenuation current, the strong and weak coupling excitation coil and the method of flowing on an inclined surface without driving force, a periodic oscillation attenuation magnetic field with controllable strong and weak coupling can be formed in the demagnetization process, which can achieve efficient demagnetization of the slurry; in addition, the magnetic feedback adjustment control of the material discharge is assembled, which can well adapt to the fluctuation of the magnetic difference of the material.

[0059] Based on the same inventive concept, the embodiment of the present application also provides a self-flowing demagnetization spiral chute control device for implementing the self-flowing demagnetization spiral chute control method involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations in one or more embodiments of the self-flowing demagnetization spiral chute control device provided below can refer to the limitations of the self-flowing demagnetization spiral chute control method above, and will not be repeated here.

[0060] In one embodiment, Figure 8 As shown, a self-flowing demagnetization spiral chute control device is provided, which is implemented based on the above-mentioned self-flowing demagnetization spiral chute device and includes:

[0061] The signal receiving module 110 is used to receive the electrical signal fed back by the magnetic monitor. The electrical signal is obtained when the slurry passes through the slurry inlet and reaches the spiral chute for no-driving force inclined flow demagnetization and then flows out from the slurry outlet, and the magnetic monitor performs discharge magnetic detection.

[0062] The current regulating module 120 is used to regulate the excitation current output to the excitation coil according to the electrical signal so as to maintain the slurry magnetism within a preset range. The excitation current is used to excite the excitation coil to generate a periodic oscillating attenuated magnetic field and form demagnetization areas with different magnetic field strengths.

[0063] Each module in the above-mentioned self-flowing demagnetization spiral chute control device can be fully or partially implemented by software, hardware and their combination. The above-mentioned modules can be embedded in or independent of the processor in the computer device in the form of hardware, or can be stored in the memory of the computer device in the form of software, so that the processor can call and execute the corresponding operations of each of the above modules.

[0064] In one embodiment, a computer device is provided. The computer device may be a server, and its internal structure diagram may be as follows: Fig. 9 As shown. The computer device includes a processor, a memory, an input / output interface (Input / Output, referred to as I / O) and a communication interface. The processor, the memory and the input / output interface are connected through a system bus, and the communication interface is connected to the system bus through the input / output interface. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the computer device is used to store data. The input / output interface of the computer device is used to exchange information between the processor and an external device. The communication interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, a self-flowing demagnetization spiral chute control method is implemented.

[0065] In one embodiment, a computer device is provided, including a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the above method when executing the computer program.

[0066] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the above method are implemented.

[0067] In one embodiment, a computer program product is provided, comprising a computer program, which implements the steps of the above method when executed by a processor.

[0068] Those of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., but are not limited to this.

[0069] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0070] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A self-flowing demagnetization spiral chute device, characterized in that: include: A control end, an excitation coil, a spiral chute and a magnetic monitor, wherein the spiral chute is provided with a slurry inlet and a slurry outlet, the magnetic monitor is located at the slurry outlet, the excitation coil is provided at the spiral chute, and the control end is connected to the magnetic monitor and the excitation coil; the spiral chute is spirally designed and vertically arranged, the slurry inlet is located at the top of the spiral chute, and the slurry outlet is located at the bottom of the spiral chute; The control end is used to output an excitation current to excite the excitation coil, generate a periodic oscillating attenuated magnetic field, and form demagnetization areas with different magnetic field strengths. By controlling the excitation current value output to different ports of the excitation coil, the magnetic field strength of each demagnetization area decreases successively from the slurry inlet to the slurry outlet; after the slurry passes through the slurry inlet to the spiral chute for driving force-free inclined flow demagnetization, it flows out from the slurry outlet; the magnetic monitor is used to perform discharge magnetic detection and feed back electrical signals to the control end, and the control end also adjusts the output excitation current according to the electrical signal to maintain the slurry magnetism within a preset range.

2. The self-flowing demagnetization spiral chute device according to claim 1 is characterized in that: The exciting coil is arranged flatly at the bottom of the spiral chute.

3. The self-flowing demagnetization spiral chute device according to claim 1, characterized in that: The included angle between two adjacent passages of the spiral chute is 20° to 30°.

4. The self-flowing demagnetization spiral chute device according to claim 1, characterized in that: The excitation coil forms a strong demagnetization area and a weak demagnetization area in sequence along the direction from the slurry inlet to the slurry outlet according to the received excitation current.

5. The self-flowing demagnetization spiral chute device according to claim 4, characterized in that: The ratio of the excitation current in the strong demagnetization area to the weak demagnetization area is 1:0.

7.

6. The self-flowing demagnetization spiral chute device according to claim 1, characterized in that: The preset range is determined according to a magnetic threshold and a preset error margin.

7. The self-flowing demagnetization spiral chute device according to claim 6, characterized in that: The preset range is 0.9 times the magnetic threshold to 1.1 times the magnetic threshold.

8. The self-flowing demagnetization spiral chute device according to any one of claims 1 to 7, characterized in that: It also includes a support rod, and the spiral chute is fixed to the support rod.

9. The self-flowing demagnetization spiral chute device according to any one of claims 1 to 7, characterized in that: The control end includes a computer and an excitation control cabinet. The computer is connected to the magnetic force monitor through a signal path, the excitation control cabinet is connected to the computer, and the excitation control cabinet is connected to the excitation coil through an excitation connection line.

10. A method for controlling a self-flowing demagnetization spiral chute, characterized in that: The method is implemented based on the self-flowing demagnetization spiral chute device according to any one of claims 1 to 9, comprising: Receive the electrical signal fed back by the magnetic monitor; the electrical signal is obtained when the slurry passes through the slurry inlet and reaches the spiral chute for demagnetization by inclined flow without driving force and then flows out from the slurry outlet, and the magnetic monitor performs magnetic detection on the discharge; the spiral chute is spirally designed and vertically arranged, the slurry inlet is located at the top of the spiral chute, and the slurry outlet is located at the bottom of the spiral chute; The excitation current output to the excitation coil is adjusted according to the electrical signal to maintain the magnetism of the slurry within a preset range; the excitation current is used to excite the excitation coil to generate a periodic oscillating attenuation magnetic field, forming demagnetization areas with different magnetic field strengths, and by controlling the excitation current value output to different ports of the excitation coil, the magnetic field strength of each demagnetization area decreases successively from the slurry inlet to the slurry outlet.

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