Automatic control system and method for dense medium mineral separation

Abstract

The invention provides an automatic control system and method for dense medium beneficiation. The method comprises the steps that the axial speed of fluid in an inner rotational flow area and the radial speed of fluid in an outer rotational flow area in a dense medium cyclone after flow gradient increase of dense medium suspension liquid each time are collected; determining a first dynamic change characteristic of the target mineral particles according to the first density field distribution of the fluid in the inner rotational flow area in the dense medium cyclone at each axial speed, and determining a second dynamic change characteristic of the target mineral particles according to the second density field distribution of the fluid in the outer rotational flow area in the dense medium cyclone at each radial speed; determining the separation degree of the target mineral particles by combining the first dynamic change characteristic and the second dynamic change characteristic with the centrifugal coefficient of the target mineral particles in the rotating process; and the valve opening degree of a dense medium suspension liquid inlet in the dense medium cyclone is controlled based on the separation degree. According to the scheme, based on the separation degree, the target mineral particles can be separated and balanced under the fluctuation influence of the feeding flow of the dense medium suspension.

Description

Technical Field

[0001] The present application relates to the technical field of mining machinery and equipment, and more specifically, to an automatic control system and method for heavy medium ore dressing. Background Art

[0002] With the development of industrial automation and intelligence, heavy medium beneficiation control has become the key to improving beneficiation efficiency and accuracy. The core of heavy medium beneficiation is to use heavy media with a density between that of valuable minerals and waste rocks to achieve effective separation of minerals. Heavy medium cyclones are usually used to separate mineral particles. Traditional heavy medium beneficiation relies on manual experience and regular sampling and analysis, which makes it difficult to achieve real-time control, resulting in limited separation efficiency and accuracy. Modern heavy medium cyclones can monitor and adjust key parameters such as density and flow of heavy media in real time through integrated sensors, automatic adjustment systems and advanced algorithms to ensure the stability and efficiency of the separation process.

[0003] In the existing heavy medium beneficiation control, the heavy medium beneficiation control realizes the efficient separation of minerals by controlling the density and flow rate of the heavy medium liquid. The heavy medium is usually composed of high-density particles (such as magnetite powder) suspended in water, and its density can be precisely adjusted according to the beneficiation requirements. The control system dynamically adjusts the feeding amount of the heavy medium by online monitoring of the heavy medium density, slurry concentration and other states, thereby ensuring the stability and effectiveness of the separation process. However, in the automatic control of heavy medium beneficiation, the fluctuation of the feed flow rate of the heavy medium suspension will cause the flow field in the heavy medium cyclone to change, causing the radial velocity and axial velocity in the heavy medium cyclone to change, destroying the separation balance of the target mineral particles, thereby reducing the separation accuracy of the target mineral particles. Therefore, how to separate and balance the target mineral particles under the influence of the fluctuation of the feed flow rate of the heavy medium suspension, thereby improving the separation accuracy of the target mineral particles has become a difficult problem faced by the industry. Summary of the invention

[0004] The present application provides an automatic control system and method for heavy medium beneficiation, which can separate and balance target mineral particles under the influence of fluctuations in the feed flow rate of a heavy medium suspension, thereby improving the separation accuracy of the target mineral particles.

[0005] In a first aspect, the present application provides a heavy medium beneficiation automatic control method, comprising the following steps: Obtaining the calibrated flow rate of the heavy medium suspension when the heavy medium cyclone separates the target mineral particles; In the process of separating the target mineral particles, the flow rate of the heavy medium suspension is increased from the initial flow rate gradient to the calibrated flow rate, and the axial velocity of the fluid in the inner cyclone zone and the radial velocity of the fluid in the outer cyclone zone in the heavy medium cyclone are collected after each increase in the flow rate gradient; Determine the first dynamic change characteristics of the target mineral particles when they are separated in the inner cyclonic flow zone according to the first density field distribution of the fluid in the inner cyclonic flow zone at various axial velocities in the heavy medium cyclone, and determine the second dynamic change characteristics of the target mineral particles when they are separated in the outer cyclonic flow zone according to the second density field distribution of the fluid in the outer cyclonic flow zone at various radial velocities in the heavy medium cyclone; Calculating the centrifugal coefficient of the target mineral particles in the heavy medium cyclone during the rotation process, and determining the separation degree of the target mineral particles in the heavy medium cyclone through the first dynamic change characteristic, the second dynamic change characteristic and the centrifugal coefficient; The valve opening of the heavy medium suspension inlet in the heavy medium cyclone is controlled based on the separation degree.

[0006] In some embodiments, obtaining the calibrated flow rate of the heavy medium suspension when the heavy medium cyclone separates the target mineral particles specifically includes: Obtaining a flow log of a heavy medium suspension during separation of target mineral particles by the heavy medium cyclone; The flow rate of the heavy medium suspension when the particle size distribution of the target mineral particles is greater than the particle size distribution stability threshold is extracted from the flow log as the calibrated flow rate of the heavy medium suspension when the heavy medium cyclone separates the target mineral particles.

[0007] In some embodiments, collecting the axial velocity of the fluid in the inner cyclone region and the radial velocity of the fluid in the outer cyclone region in the heavy medium cyclone after each flow gradient increase specifically includes: An axial velocity sensor and a radial velocity sensor are respectively arranged in the inner cyclone area and the outer cyclone area of ​​the heavy medium cyclone; After each increase in the flow gradient, the axial velocity of the fluid in the inner cyclone region and the radial velocity of the fluid in the outer cyclone region in the heavy medium cyclone are respectively collected by the axial velocity sensor and the radial velocity sensor.

[0008] In some embodiments, determining the first dynamic change characteristics of target mineral particles when being separated in the inner cyclonic flow zone through the first density field distribution of the fluid in the inner cyclonic flow zone of the heavy medium cyclone at various axial velocities specifically includes: Fit all axial velocities to obtain an axial velocity fitting curve; Based on the axial velocity fitting curve, abnormal axial velocities are eliminated from all axial velocities to obtain a confident axial velocity sequence; A confident axial velocity in the confident axial velocity sequence is selected as a selected axial velocity, and density data of the fluid in the inner vortex zone of the heavy medium cyclone at the selected axial velocity is collected, and a first density field distribution of the fluid in the inner vortex zone of the heavy medium cyclone at the selected axial velocity is constructed based on the density data; Continue to construct and obtain a first density field distribution of the fluid in the inner cyclone zone in the heavy medium cyclone at the residual axial velocity; All first density field distributions are fused and analyzed to obtain the first dynamic change characteristics of the target mineral particles when they are separated in the inner cyclonic flow zone.

[0009] In some embodiments, calculating the centrifugal coefficient of the target mineral particles in the heavy medium cyclone during the rotation process specifically includes: collecting the rotational angular velocity of the heavy medium cyclone; The centrifugal acceleration of the target mineral particles is calculated based on the rotational angular velocity, the rotational radius of the heavy medium cyclone and the initial feed mass of the target mineral particles; The centrifugal acceleration is calculated by ratioing the centrifugal acceleration to the gravitational acceleration of the target mineral particles to obtain the centrifugal coefficient of the target mineral particles in the heavy medium cyclone during the rotation process.

[0010] In some embodiments, the heavy medium cyclone is a cylindrical-conical heavy medium cyclone.

[0011] In some embodiments, the heavy medium suspension is a mixture of liquid and solid particles.

[0012] In a second aspect, the present application provides a heavy medium beneficiation automatic control system, comprising: An acquisition module, used to acquire a calibrated flow rate of a heavy medium suspension when the heavy medium cyclone separates target mineral particles; A processing module, used for increasing the flow rate of the heavy medium suspension from the initial flow rate gradient to the calibrated flow rate during the separation of target mineral particles, and collecting the axial velocity of the fluid in the inner cyclone zone and the radial velocity of the fluid in the outer cyclone zone in the heavy medium cyclone after each increase in the flow rate gradient; The processing module is further used to determine the first dynamic change characteristics of the target mineral particles when they are separated in the inner cyclonic flow zone in the heavy medium cyclone according to the first density field distribution of the fluid in the inner cyclonic flow zone at various axial velocities, and to determine the second dynamic change characteristics of the target mineral particles when they are separated in the outer cyclonic flow zone according to the second density field distribution of the fluid in the outer cyclonic flow zone in the heavy medium cyclone at various radial velocities; The processing module is further used to calculate the centrifugal coefficient of the target mineral particles in the heavy medium cyclone during the rotation process, and determine the separation degree of the target mineral particles in the heavy medium cyclone through the first dynamic change characteristic, the second dynamic change characteristic and the centrifugal coefficient; An execution module is used to control the valve opening of the heavy medium suspension inlet in the heavy medium cyclone based on the separation degree.

[0013] In a third aspect, the present application provides a computer device, comprising a memory and a processor, wherein the memory stores codes, and the processor is configured to obtain the codes and execute the above-mentioned automatic control method for heavy medium beneficiation.

[0014] In a fourth aspect, the present application provides a computer-readable storage medium storing a computer program, which implements the above-mentioned automatic control method for heavy medium beneficiation when executed by a processor.

[0015] The technical solution provided by the embodiments disclosed in this application has the following beneficial effects: In the heavy medium beneficiation automatic control system and method provided in the present application, firstly, a calibrated flow rate of a heavy medium suspension when a heavy medium cyclone separates target mineral particles is obtained; secondly, in the process of separating target mineral particles, the flow rate of the heavy medium suspension is increased from an initial flow rate gradient to the calibrated flow rate, and the axial velocity of the fluid in the inner cyclone zone and the radial velocity of the fluid in the outer cyclone zone in the heavy medium cyclone are collected after each increase in the flow rate gradient; further, the first density field distribution of the fluid in the inner cyclone zone in the heavy medium cyclone at each axial velocity is used to determine the target mineral particles in the inner cyclone zone. The first dynamic change characteristic of the target mineral particles when being separated in the outer cyclonic flow zone is determined according to the second density field distribution of the fluid in the outer cyclonic flow zone in the heavy medium cyclone at various radial velocities; then, the centrifugal coefficient of the target mineral particles in the heavy medium cyclone during the rotation process is calculated, and the separation degree of the target mineral particles in the heavy medium cyclone is determined by the first dynamic change characteristic, the second dynamic change characteristic and the centrifugal coefficient; finally, the valve opening of the heavy medium suspension inlet in the heavy medium cyclone is controlled based on the separation degree.

[0016] It can be seen that the present application can separate and balance the target mineral particles under the influence of the fluctuation of the feed flow rate of the heavy medium suspension, thereby improving the separation accuracy of the target mineral particles; first, the calibrated flow rate of the heavy medium suspension when the heavy medium cyclone separates the target mineral particles is obtained to provide conditions for effective quality control and standardized production of the mineral particles; secondly, the axial velocity of the fluid in the inner cyclone zone and the radial velocity of the fluid in the outer cyclone zone in the heavy medium cyclone are collected after each increase in the flow gradient of the heavy medium suspension, so as to analyze the particle size distribution characteristics of the target mineral particles in the outer cyclone zone and the inner cyclone zone, so as to reveal the distribution trend of particles of different particle sizes, and then provide a basis for optimizing the quality of particle sorting, thereby avoiding heavy medium cyclones. The influence of separation imbalance caused by the fluctuation of the feed flow rate of the medium suspension; further, determine the first dynamic change characteristics of the target mineral particles when they are separated in the inner cyclone zone and the second dynamic change characteristics when they are separated in the outer cyclone zone, so as to evaluate whether the fluid flow of the heavy medium cyclone meets expectations, and then optimize the flow state of the fluid, adjust the flow rate of the heavy medium cyclone, so as to improve the sorting efficiency and separation quality of the mineral particles; then, determine the separation degree of the target mineral particles in the heavy medium cyclone through the first dynamic change characteristics, the second dynamic change characteristics and the centrifugal coefficient; finally, control the valve opening of the heavy medium suspension inlet in the heavy medium cyclone based on the separation degree. In summary, the technical solution provided by the present application can separate and balance the target mineral particles under the influence of the fluctuation of the feed flow rate of the heavy medium suspension, thereby improving the separation accuracy of the target mineral particles. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is an exemplary flow chart of an automatic control method for heavy medium beneficiation according to some embodiments of the present application; Figure 2 is a schematic diagram of the structure of a heavy medium cyclone according to some embodiments of the present application Figure 3 is an exemplary flow chart for determining a calibration flow rate according to some embodiments of the present application; Figure 4 It is a schematic diagram of the structure of the heavy medium beneficiation automatic control system according to some embodiments of the present application; Figure 5 It is a schematic diagram of the structure of a computer device for implementing an automatic control method for heavy medium beneficiation according to some embodiments of the present application. DETAILED DESCRIPTION

[0018] In order to better understand the technical solution of the present application, the technical solution of the present application will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0019] refer to Figure 1, which is an exemplary flow chart of a heavy medium beneficiation automatic control method according to some embodiments of the present application. The heavy medium beneficiation automatic control method 100 mainly includes the following steps: In step 101, a calibrated flow rate of a heavy medium suspension when a heavy medium cyclone separates target mineral particles is obtained.

[0020] It should be noted that the heavy medium cyclone in the present application is a mineral processing equipment for separating solid particles of different densities. The heavy medium cyclone is a cylindrical conical heavy medium cyclone, and its working principle is based on centrifugal force and density difference to achieve the separation of mineral particles. The heavy medium cyclone is mainly composed of a heavy medium suspension inlet, a valve for the heavy medium suspension inlet, a feed inlet, an overflow port, an underflow port, and a connecting pipe. Figure 2 , which is a schematic diagram of the structure of the heavy medium cyclone shown in some embodiments of the present application.

[0021] In some embodiments, reference Figure 3 As shown, this figure is an exemplary flow chart for determining the calibration flow rate according to some embodiments of the present application. In this embodiment, the calibration flow rate of the heavy medium suspension when the heavy medium cyclone separates the target mineral particles can be obtained by the following steps: First, in step 1011, a flow log of a heavy medium suspension in a process of separating target mineral particles by the heavy medium cyclone is obtained; Then, in step 1012, the flow rate of the heavy medium suspension when the particle size distribution of the target mineral particles is greater than the particle size distribution stability threshold is extracted from the flow log as the calibrated flow rate of the heavy medium suspension when the heavy medium cyclone separates the target mineral particles.

[0022] In the specific implementation, first, the flow log of the heavy medium suspension in the process of separating the target mineral particles by the heavy medium cyclone is obtained from the heavy medium beneficiation control database, the flow log represents the flow data set of the heavy medium suspension flowing through the heavy medium cyclone, and the flow log contains the flow information of the heavy medium suspension entering the heavy medium cyclone at different time points; then, the particle size distribution corresponding to the target mineral particles at each heavy medium suspension flow in the flow log is obtained by a laser particle size analyzer, and the flow rate of the heavy medium suspension when the particle size distribution of the target mineral particles is greater than the particle size distribution stability threshold is extracted as the calibrated flow rate of the heavy medium suspension when the heavy medium cyclone separates the target mineral particles.

[0023] It should be noted that the particle size distribution in this embodiment represents the degree of dispersion of the target mineral particles in size; the particle size distribution stability threshold in this embodiment represents a pre-set steady-state particle size distribution, which is used to screen out the calibrated flow rate of the heavy medium suspension when the heavy medium cyclone separates the target mineral particles. The specific setting can be based on actual needs and is not limited here.

[0024] It should also be noted that the calibrated flow rate in the present application represents the set standard flow rate value, that is, the flow rate of the heavy medium suspension flowing through the cyclone under pre-set working conditions, which is accurately measured. The calibrated flow rate is the standard flow rate value recommended for the heavy medium cyclone under optimal working performance, which is used to measure and control the reference flow rate for normal operation of the heavy medium cyclone. By obtaining the calibrated flow rate, conditions are provided for effective quality control and standardized production of mineral particles. In addition, the heavy medium suspension in the present application is a mixture of liquid and solid particles.

[0025] In step 102, during the separation of target mineral particles, the flow rate of the heavy medium suspension is increased from the initial flow gradient to the calibrated flow rate, and the axial velocity of the fluid in the inner cyclone zone and the radial velocity of the fluid in the outer cyclone zone in the heavy medium cyclone are collected after each increase in the flow gradient.

[0026] In some embodiments, during the separation of target mineral particles, the flow rate of the heavy medium suspension is increased from the initial flow rate gradient to the calibrated flow rate by the following steps, namely: Setting the initial flow rate and flow gradient value of the heavy medium suspension when separating the target mineral particles; In the process of separating the target mineral particles, the flow rate of the heavy medium suspension is increased from the initial flow rate gradient to the calibrated flow rate according to the magnitude of the flow rate gradient value.

[0027] In specific implementation, first, the initial flow rate and flow gradient value in the target mineral particle separation process are set through a heavy medium suspension flow regulating device (such as a regulating valve) and a flow sensor, the initial flow rate represents the initial flow value of the heavy medium suspension, and the flow gradient value represents the increment of the heavy medium suspension flow adjustment; then, according to the size of the flow gradient value, the flow rate of the heavy medium suspension is gradually increased from the initial flow rate through the heavy medium suspension flow regulating device until the calibrated flow rate is reached.

[0028] It should be noted that the inner cyclone zone in the heavy medium cyclone in the present application refers to the position area close to the cyclone axis during the movement of the fluid inside the heavy medium cyclone. This area is mainly axial flow, and the fluid presents a higher axial velocity. In the inner cyclone zone, the light particles and fine particles in the heavy medium suspension tend to be guided to the overflow outlet of the cyclone for discharge due to the smaller centrifugal force and stronger upward flow. The outer cyclone zone in the heavy medium cyclone in the present application refers to the position area close to the wall during the movement of the fluid inside the heavy medium cyclone. The fluid in this area is mainly radially moving and presents a higher radial velocity. In the outer cyclone zone, the heavier particles in the heavy medium suspension tend to be pushed to the wall due to the larger centrifugal force, and move downward along the cone direction of the cyclone, and finally discharged from the sand settling port. The fluid refers to a mixture of heavy medium suspension and target mineral particles.

[0029] In some embodiments, the following steps may be used to collect the axial velocity of the fluid in the inner cyclone region and the radial velocity of the fluid in the outer cyclone region in the heavy medium cyclone after each increase in the flow gradient, namely: An axial velocity sensor and a radial velocity sensor are respectively arranged in the inner cyclone area and the outer cyclone area of ​​the heavy medium cyclone; After each increase in the flow gradient, the axial velocity of the fluid in the inner cyclone region and the radial velocity of the fluid in the outer cyclone region in the heavy medium cyclone are respectively collected by the axial velocity sensor and the radial velocity sensor.

[0030] In a specific implementation, first, an axial velocity sensor and a radial velocity sensor are respectively arranged in the inner vortex zone and the outer vortex zone of the heavy medium cyclone; then, after each flow gradient increase, the axial velocity of the fluid in the inner vortex zone and the radial velocity of the fluid in the outer vortex zone of the heavy medium cyclone are respectively collected by the axial velocity sensor and the radial velocity sensor.

[0031] It should be noted that the axial velocity of the fluid in the inner cyclone zone in the present application represents the velocity of the fluid flowing along the axial direction of the heavy medium cyclone. By accurately measuring the axial velocity, the motion trajectory of the target mineral particles in the heavy medium cyclone can be effectively analyzed, thereby evaluating the separation efficiency of light particles and heavy particles; the radial velocity of the fluid in the outer cyclone zone in the present application represents the velocity of the fluid flowing in a direction perpendicular to the axial direction of the heavy medium cyclone. By determining the radial velocity, the ability of the heavy medium cyclone to push heavy particles to the wall for centrifugal separation can be evaluated, which helps to determine the particle size distribution characteristics of the target mineral particles in the outer cyclone zone, so as to reveal the distribution trend of particles of different particle sizes in the radial direction, thereby providing a basis for optimizing the quality of particle sorting.

[0032] In step 103, the first dynamic change characteristics of the target mineral particles when they are separated in the inner cyclone are determined by the first density field distribution of the fluid in the inner cyclone at various axial velocities, and the second dynamic change characteristics of the target mineral particles when they are separated in the outer cyclone are determined according to the second density field distribution of the fluid in the outer cyclone at various radial velocities.

[0033] In some embodiments, the first dynamic change characteristics of the target mineral particles when separated in the inner cyclone region are determined by the first density field distribution of the fluid in the inner cyclone region at various axial velocities in the heavy medium cyclone, which can be specifically determined by the following steps, namely: Fit all axial velocities to obtain an axial velocity fitting curve; Based on the axial velocity fitting curve, abnormal axial velocities are eliminated from all axial velocities to obtain a confident axial velocity sequence; A confident axial velocity in the confident axial velocity sequence is selected as a selected axial velocity, and density data of the fluid in the inner vortex zone of the heavy medium cyclone at the selected axial velocity is collected, and a first density field distribution of the fluid in the inner vortex zone of the heavy medium cyclone at the selected axial velocity is constructed based on the density data; Continue to construct and obtain a first density field distribution of the fluid in the inner cyclone zone in the heavy medium cyclone at the residual axial velocity; All first density field distributions are fused and analyzed to obtain the first dynamic change characteristics of the target mineral particles when they are separated in the inner cyclonic flow zone.

[0034] In specific implementation, firstly, the least square method is used to fit all axial velocities to obtain an axial velocity fitting curve, and the axial velocity fitting curve represents a curve obtained by axial velocity fitting; secondly, based on the axial velocity fitting curve, abnormal axial velocities are eliminated from all axial velocities to obtain a confident axial velocity sequence, that is, the absolute difference between each fitted axial velocity on the axial velocity fitting curve and the original axial velocity is calculated to obtain a fitting deviation value of each axial velocity, the axial velocity corresponding to the fitting deviation value greater than the deviation threshold is extracted and eliminated, and the remaining axial velocities are arranged in order to obtain a confident axial velocity sequence. The fitting deviation value represents the deviation between the fitting axial velocity and the original axial velocity, and the confident axial velocity sequence represents a set of effective axial velocities; further, a confident axial velocity in the confident axial velocity sequence is selected as the selected axial velocity, and the density data of the fluid in the inner vortex zone in the heavy medium cyclone at the selected axial velocity are collected by a density sensor, and then, based on the density data, a first density field distribution of the fluid in the inner vortex zone in the heavy medium cyclone at the selected axial velocity is constructed, that is, based on the density data, a computational fluid dynamics simulation software is used to construct a first density field distribution of the fluid in the inner vortex zone in the heavy medium cyclone at the selected axial velocity. The first density field distribution of the fluid at the selected axial velocity is obtained by, for example, using CFD software, that is, inputting each density value and its corresponding position in the density data as input parameters into the computational fluid dynamics simulation software, and constructing the first density field distribution of the fluid in the inner vortex zone of the heavy medium cyclone at the selected axial velocity by the computational fluid dynamics simulation software; then, the first density field distribution of the fluid in the inner vortex zone of the heavy medium cyclone at the remaining axial velocity is further constructed by the implementation method of “constructing the first density field distribution of the fluid in the inner vortex zone of the heavy medium cyclone at the selected axial velocity based on the density data”. density field distribution; finally, the weighted average method in the data fusion technology is used to fuse and analyze all the first density field distributions, so as to obtain the first dynamic change characteristics of the target mineral particles when they are separated in the inner vortex flow zone, that is: different weights are assigned to each first density field distribution (such as setting the weights based on the reliability factors of the fluid dynamics model), and a weighted average density field distribution is calculated from each weighted first density field distribution, the density mean is calculated for the calculated weighted average density field distribution, and the density mean calculation result is used as the first dynamic change characteristic of the target mineral particles when they are separated in the inner vortex flow zone.

[0035] It should be noted that the first density field distribution in the present application represents the density distribution information of the fluid in the inner vortex zone, and the density field distribution reflects the flow characteristics of the fluid inside the cyclone; the first dynamic change characteristic in the present application represents the dynamic change behavior characteristics of the target mineral particles in the inner vortex zone, and the first dynamic change characteristic reflects the movement state of the target mineral particles inside the inner vortex zone. Since the flow of the fluid in the inner vortex zone in the heavy medium cyclone is not uniform, the density field change of the fluid helps to reveal the movement state of the fluid in the inner vortex zone. By analyzing the first density field distribution to obtain the first dynamic change characteristic, it is possible to evaluate whether the fluid flow of the heavy medium cyclone meets expectations, whether there are dead zones or vortices and other poor flow areas in the inner vortex zone, and then optimize the flow state of the fluid, adjust the flow rate, pressure and other operating parameters of the heavy medium cyclone, thereby improving the sorting efficiency and separation quality of mineral particles.

[0036] In some embodiments, the second dynamic change characteristics of the target mineral particles when being separated in the outer cyclonic flow zone in the heavy medium cyclone can be determined according to the second density field distribution of the fluid in the outer cyclonic flow zone at various radial velocities, and the following steps can be used, namely: Fit all radial velocities to obtain a radial velocity fitting curve; Eliminating abnormal radial velocities from all radial velocities based on the radial velocity fitting curve to obtain a confident radial velocity sequence; A trusted radial velocity in the trusted radial velocity sequence is selected as a selected radial velocity, and density data of the fluid in the outer cyclone zone in the heavy medium cyclone at the selected radial velocity is collected, and a second density field distribution of the fluid in the outer cyclone zone in the heavy medium cyclone at the selected radial velocity is constructed based on the density data; Continue to construct and obtain a second density field distribution of the fluid in the outer cyclone zone of the heavy medium cyclone at the residual radial velocity; All second density field distributions are fused and analyzed to obtain the second dynamic change characteristics of the target mineral particles when they are separated in the outer cyclonic flow zone.

[0037] In specific implementation, firstly, the least square method is used to fit all radial velocities to obtain a radial velocity fitting curve, and the radial velocity fitting curve represents a curve obtained by radial velocity fitting; secondly, based on the radial velocity fitting curve, abnormal radial velocities are eliminated from all radial velocities to obtain a confident radial velocity sequence, that is, the absolute difference between each fitted radial velocity on the radial velocity fitting curve and the original radial velocity is calculated to obtain a fitting deviation value of each radial velocity, the radial velocities corresponding to the fitting deviation value greater than the deviation threshold are extracted and eliminated, and the remaining radial velocities are arranged in order to obtain a confident radial velocity sequence. The fitting deviation value represents the deviation between the fitting radial velocity and the original radial velocity, and the confident radial velocity sequence represents a set of effective radial velocities; further, a confident radial velocity in the confident radial velocity sequence is selected as the selected radial velocity, and the density data of the fluid in the outer cyclone zone in the heavy medium cyclone at the selected radial velocity is collected by a density sensor, and then, based on the density data, a second density field distribution of the fluid in the outer cyclone zone in the heavy medium cyclone at the selected radial velocity is constructed, that is, based on the density data, a computational fluid dynamics simulation software is used to construct the second density field distribution of the fluid in the outer cyclone zone in the heavy medium cyclone at the selected radial velocity. The second density field distribution of the fluid at the selected radial velocity is obtained by, for example, using CFD software, that is, inputting each density value and its corresponding position in the density data as input parameters into the computational fluid dynamics simulation software, and constructing the second density field distribution of the fluid in the outer cyclone zone in the heavy medium cyclone at the selected radial velocity by the computational fluid dynamics simulation software; then, the second density field distribution of the fluid in the outer cyclone zone in the heavy medium cyclone at the remaining radial velocity is further constructed by the implementation method of “constructing the second density field distribution of the fluid in the outer cyclone zone in the heavy medium cyclone at the selected radial velocity based on the density data”. degree field distribution; finally, the weighted average method in the data fusion technology is used to fuse and analyze all the second density field distributions, and then the second dynamic change characteristics of the target mineral particles when they are separated in the outer cyclonic flow zone are obtained, that is: different weights are assigned to each second density field distribution (such as setting the weights based on the reliability factors of the fluid dynamics model), and a weighted average density field distribution is calculated from each weighted second density field distribution, the density mean is calculated for the calculated weighted average density field distribution, and the density mean calculation result is used as the second dynamic change characteristic of the target mineral particles when they are separated in the outer cyclonic flow zone.

[0038] It should be noted that the second density field distribution in the present application represents the density distribution information of the fluid in the outer cyclone zone, and the density field distribution reflects the flow characteristics of the fluid inside the cyclone; the second dynamic change characteristic in the present application represents the dynamic change behavior characteristics of the target mineral particles in the outer cyclone area, and the second dynamic change characteristic reflects the motion state of the target mineral particles inside the outer cyclone area. Since the flow of the fluid in the outer cyclone area in the heavy medium cyclone is not uniform, the density field change of the fluid helps to reveal the motion state of the target mineral particles in the outer cyclone area. By analyzing the second density field distribution to obtain the second dynamic change characteristic, it is possible to evaluate whether the fluid flow of the heavy medium cyclone meets expectations, whether there are dead zones or eddies in the outer cyclone area and other poor flow areas, thereby optimizing the flow state of the fluid, adjusting the flow rate, pressure and other operating parameters of the heavy medium cyclone, and thus improving the sorting efficiency and separation quality of the mineral particles.

[0039] In step 104, the centrifugal coefficient of the target mineral particles in the heavy medium cyclone during the rotation process is calculated, and the separation degree of the target mineral particles in the heavy medium cyclone is determined by combining the first dynamic change characteristic, the second dynamic change characteristic and the centrifugal coefficient.

[0040] In some embodiments, the centrifugal coefficient of the target mineral particles in the heavy medium cyclone during the rotation process can be calculated by the following steps, namely: collecting the rotational angular velocity of the heavy medium cyclone; The centrifugal acceleration of the target mineral particles is calculated based on the rotational angular velocity, the rotational radius of the heavy medium cyclone and the initial feed mass of the target mineral particles; The centrifugal acceleration is calculated by ratioing the centrifugal acceleration to the gravitational acceleration of the target mineral particles to obtain the centrifugal coefficient of the target mineral particles in the heavy medium cyclone during the rotation process.

[0041] In specific implementation, first, the rotation sensor in the heavy medium cyclone is used to collect the rotational angular velocity of the heavy medium cyclone, and the rotational angular velocity represents the rate at which the fluid rotates around the central axis of the heavy medium cyclone; then, the centrifugal acceleration of the target mineral particles is calculated by the centrifugal force formula by knowing the rotational angular velocity, the rotation radius of the heavy medium cyclone and the initial feed mass of the target mineral particles, and the centrifugal acceleration represents the acceleration of the target mineral particles in the rotational motion; finally, the ratio of the centrifugal acceleration to the gravitational acceleration of the target mineral particles is calculated to obtain the centrifugal coefficient of the target mineral particles in the heavy medium cyclone during the rotation process, wherein the gravitational acceleration of the target mineral particles is.

[0042] It should be noted that the centrifugal coefficient in the present application represents a measure of the degree of centrifugation of the target mineral particles during the rotation process. The centrifugal coefficient reflects the relative relationship between the centrifugal force to which the target mineral particles are subjected during the rotation process and their own weight. The larger the centrifugal coefficient, the stronger the centrifugal force to which the target mineral particles are subjected during the rotation process, and vice versa. In the heavy medium cyclone, the centrifugal coefficient plays a decisive role. A larger centrifugal coefficient means that the centrifugal force of the mineral particles in the heavy medium cyclone has a greater effect on the particle movement, which is helpful for the separation of the particles. By controlling the centrifugal coefficient, the sorting efficiency of the heavy medium cyclone for mineral particles can be effectively improved.

[0043] In some embodiments, the separation degree of the target mineral particles in the heavy medium cyclone can be determined by combining the first dynamic change characteristic, the second dynamic change characteristic and the centrifugal coefficient, specifically by the following steps, namely: performing a separation stability analysis on the target mineral particles in the heavy medium cyclone according to the first dynamic change characteristic and the second dynamic change characteristic to obtain the separation stability of the target mineral particles; The separation degree of target mineral particles in the heavy medium cyclone is determined based on the separation stability and the centrifugal coefficient.

[0044] In the specific implementation, first, the target mineral particles in the heavy medium cyclone are separated by a steady-state analysis according to the first dynamic change characteristic and the second dynamic change characteristic, and the separation stability of the target mineral particles is obtained, that is, the first dynamic change characteristic and the second dynamic change characteristic are weighted and summed, and the result of the weighted sum is used as the separation stability of the target mineral particles, wherein the weights of the first dynamic change characteristic and the second dynamic change characteristic can be set to 0.57 and 0.43 respectively. In addition, it can also be set according to actual needs, which is not limited here. The separation stability represents the target mineral particles. The stability of the particles in the separation process is determined. By determining the separation stability, it can be ensured that the separation process can be carried out stably under different operating conditions, thereby improving the sorting accuracy. Then, the separation degree of the target mineral particles in the heavy medium cyclone is determined based on the separation stability and the centrifugal coefficient, that is, the separation stability and the centrifugal coefficient are multiplied, and the product calculation result is used as the separation degree of the target mineral particles in the heavy medium cyclone. In addition, in other embodiments, other calculation methods can also be used to calculate the separation degree of the target mineral particles in the heavy medium cyclone, which is not limited here.

[0045] It should be noted that the separation degree in this application represents an indicator for measuring the degree of separation of target mineral particles, that is, the greater the separation degree, the greater the degree of separation of target mineral particles, and the smaller the separation degree, the smaller the degree of separation of target mineral particles. The separation degree is an important parameter for evaluating the efficiency of the sorting system. The separation degree determines the performance and sorting accuracy of the sorting equipment. In industrial applications, the separation degree affects the recovery rate of minerals, the quality of the final product and the economic benefits of mining production. A higher separation degree means maximizing the utilization of resources in the sorting process, effectively improving the sorting effect and reducing unnecessary energy waste and mineral loss.

[0046] In step 105, the valve opening of the heavy medium suspension inlet in the heavy medium cyclone is controlled based on the separation degree.

[0047] In some embodiments, the valve opening of the heavy medium suspension inlet in the heavy medium cyclone is controlled based on the separation degree, and the following steps can be used, namely: The separation degree is compared with a separation degree threshold. When the separation degree is less than the separation degree threshold, a valve opening signal of the heavy medium suspension inlet in the heavy medium cyclone is generated by the absolute difference between the separation degree and the separation degree threshold. The valve opening signal is used to control the valve opening size of the heavy medium suspension inlet in the heavy medium cyclone. When the separation degree is greater than or equal to the separation degree threshold, no processing is performed.

[0048] In specific implementation, the separation degree is compared with a separation degree threshold. When the separation degree is less than the separation degree threshold, it indicates that the effect of the current sorting process is not good. The valve opening signal of the heavy medium suspension inlet in the heavy medium cyclone is generated by the absolute difference between the separation degree and the separation degree threshold. The valve opening signal is used to control the valve opening size of the heavy medium suspension inlet in the heavy medium cyclone, for example, by increasing the valve opening. When the separation degree is greater than or equal to the separation degree threshold, it indicates that the sorting process has achieved the expected effect and no processing is performed.

[0049] It should be noted that the separation threshold in this embodiment represents a pre-set standard separation, which is used to determine whether the separation process is sufficient. If the separation is lower than the threshold, it means that the sorting process has not achieved the expected results, and the flow rate or other control parameters of the fluid may need to be adjusted. The separation threshold can be set specifically according to actual needs.

[0050] It should also be noted that the valve opening signal in this embodiment refers to a signal used to adjust the opening size of the valve at the inlet of the heavy medium suspension in the heavy medium cyclone.

[0051] In addition, in another aspect of the present application, in some embodiments, the present application provides a heavy medium beneficiation automatic control system, referring to Figure 4, which is a schematic diagram of the structure of a heavy medium beneficiation automatic control system according to some embodiments of the present application. The heavy medium beneficiation automatic control system 200 includes: an acquisition module 201, a processing module 202 and an execution module 203, which are described as follows: Acquisition module 201, in this application, acquisition module 201 is mainly used to obtain the calibration flow rate of the heavy medium suspension when the heavy medium cyclone separates the target mineral particles; The processing module 202 in the present application is mainly used to increase the flow rate of the heavy medium suspension from the initial flow gradient to the calibrated flow rate during the separation of the target mineral particles, and collect the axial velocity of the fluid in the inner cyclone zone and the radial velocity of the fluid in the outer cyclone zone in the heavy medium cyclone after each increase in the flow gradient; The processing module 202 is further used to determine the first dynamic change characteristics of the target mineral particles when they are separated in the inner cyclonic flow zone of the heavy medium cyclone according to the first density field distribution of the fluid in the inner cyclonic flow zone at various axial velocities, and to determine the second dynamic change characteristics of the target mineral particles when they are separated in the outer cyclonic flow zone according to the second density field distribution of the fluid in the outer cyclonic flow zone of the heavy medium cyclone at various radial velocities; In addition, the processing module 202 is also used to calculate the centrifugal coefficient of the target mineral particles in the heavy medium cyclone during the rotation process, and determine the separation degree of the target mineral particles in the heavy medium cyclone through the first dynamic change characteristic, the second dynamic change characteristic and the centrifugal coefficient; The execution module 203 in the present application is mainly used to control the valve opening of the heavy medium suspension inlet in the heavy medium cyclone based on the separation degree.

[0052] In addition, the present application also provides a computer device, which includes a memory and a processor, wherein the memory stores codes, and the processor is configured to obtain the codes and execute the above-mentioned heavy medium beneficiation automatic control method.

[0053] In some embodiments, reference Figure 5 , which is a schematic diagram of the structure of a computer device for implementing an automatic control method for heavy medium beneficiation according to some embodiments of the present application. The automatic control method for heavy medium beneficiation in the above embodiments can be Figure 5 The computer device 300 shown in the figure is implemented, and the computer device 300 includes at least one processor 301, a communication bus 302, a memory 303 and at least one communication interface 304.

[0054] The processor 301 may be a general-purpose central processing unit (CPU), or an application specific integrated circuit (ASIC) or one or more processors for controlling the execution of the automatic control method for heavy medium beneficiation in the present application.

[0055] The communication bus 302 may be used to transmit information between the above-mentioned components.

[0056] The memory 303 may be a read only memory (ROM) or other types of static storage devices that can store static information and instructions, a random access memory (RAM) or other types of dynamic storage devices that can store information and instructions, or an electrically erasable programmable read only memory (EEPROM), a compact disc read only memory (CD ROM) or other optical disc storage, an optical disc storage (including a compressed optical disc, a laser disc, an optical disc, a digital versatile disc, a Blu-ray disc, etc.), a magnetic disk or other magnetic storage device, or any other medium that can be used to carry or store the desired program code in the form of an instruction or data structure and can be accessed by a computer, but is not limited thereto. The memory 303 may exist independently and be connected to the processor 301 via the communication bus 302. The memory 303 may also be integrated with the processor 301.

[0057] The memory 303 is used to store the program code for executing the solution of the present application, and the execution is controlled by the processor 301. The processor 301 is used to execute the program code stored in the memory 303. The program code may include one or more software modules. The determination of the automatic control method for heavy medium beneficiation in the above embodiment can be implemented by the processor 301 and one or more software modules in the program code in the memory 303.

[0058] The communication interface 304 uses any transceiver or other device for communicating with other devices or communication networks, such as Ethernet, radio access network (RAN), wireless local area networks (WLAN), etc.

[0059] In a specific implementation, as an embodiment, a computer device may include multiple processors, each of which may be a single-core (single CPU) processor or a multi-core (multi CPU) processor. The processor here may refer to one or more devices, circuits, and / or processing cores for processing data (such as computer program instructions).

[0060] The above-mentioned computer device may be a general-purpose computer device or a special-purpose computer device. In a specific implementation, the computer device may be a desktop computer, a portable computer, a network server, a personal digital assistant (PDA), a mobile phone, a tablet computer, a wireless terminal device, a communication device or an embedded device. The embodiment of the present application does not limit the type of computer device.

[0061] In addition, the present application also provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, the above-mentioned automatic control method for heavy medium beneficiation is implemented.

[0062] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0063] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A heavy medium beneficiation automatic control method, characterized in that: The steps include: Obtaining the calibrated flow rate of the heavy medium suspension when the heavy medium cyclone separates the target mineral particles; In the process of separating the target mineral particles, the flow rate of the heavy medium suspension is increased from the initial flow rate gradient to the calibrated flow rate, and the axial velocity of the fluid in the inner cyclone zone and the radial velocity of the fluid in the outer cyclone zone in the heavy medium cyclone are collected after each increase in the flow rate gradient; Determine the first dynamic change characteristics of the target mineral particles when they are separated in the inner cyclonic flow zone according to the first density field distribution of the fluid in the inner cyclonic flow zone at various axial velocities in the heavy medium cyclone, and determine the second dynamic change characteristics of the target mineral particles when they are separated in the outer cyclonic flow zone according to the second density field distribution of the fluid in the outer cyclonic flow zone at various radial velocities in the heavy medium cyclone; Calculating the centrifugal coefficient of the target mineral particles in the heavy medium cyclone during the rotation process, and determining the separation degree of the target mineral particles in the heavy medium cyclone through the first dynamic change characteristic, the second dynamic change characteristic and the centrifugal coefficient; The valve opening of the heavy medium suspension inlet in the heavy medium cyclone is controlled based on the separation degree.

2. The method according to claim 1, characterized in that The calibration flow rate of the heavy medium suspension when the heavy medium cyclone separates the target mineral particles specifically includes: Obtaining a flow log of a heavy medium suspension during separation of target mineral particles by the heavy medium cyclone; The flow rate of the heavy medium suspension when the particle size distribution of the target mineral particles is greater than the particle size distribution stability threshold is extracted from the flow log as the calibrated flow rate of the heavy medium suspension when the heavy medium cyclone separates the target mineral particles.

3. The method according to claim 1, characterized in that The axial velocity of the fluid in the inner cyclone region and the radial velocity of the fluid in the outer cyclone region in the heavy medium cyclone after each flow gradient increase specifically include: An axial velocity sensor and a radial velocity sensor are respectively arranged in the inner cyclone area and the outer cyclone area of ​​the heavy medium cyclone; After each increase in the flow gradient, the axial velocity of the fluid in the inner cyclone region and the radial velocity of the fluid in the outer cyclone region in the heavy medium cyclone are respectively collected by the axial velocity sensor and the radial velocity sensor.

4. The method according to claim 1, characterized in that The first dynamic change characteristics of the target mineral particles when being separated in the inner cyclonic flow zone are determined by the first density field distribution of the fluid in the inner cyclonic flow zone of the heavy medium cyclone at various axial velocities, specifically including: Fit all axial velocities to obtain an axial velocity fitting curve; Based on the axial velocity fitting curve, abnormal axial velocities are eliminated from all axial velocities to obtain a confident axial velocity sequence; A confident axial velocity in the confident axial velocity sequence is selected as a selected axial velocity, and density data of the fluid in the inner vortex zone of the heavy medium cyclone at the selected axial velocity is collected, and a first density field distribution of the fluid in the inner vortex zone of the heavy medium cyclone at the selected axial velocity is constructed based on the density data; Continue to construct and obtain a first density field distribution of the fluid in the inner cyclone zone in the heavy medium cyclone at the residual axial velocity; All first density field distributions are fused and analyzed to obtain the first dynamic change characteristics of the target mineral particles when they are separated in the inner cyclonic flow zone.

5. The method according to claim 1, characterized in that Calculating the centrifugal coefficient of the target mineral particles in the heavy medium cyclone during the rotation process specifically includes: collecting the rotational angular velocity of the heavy medium cyclone; The centrifugal acceleration of the target mineral particles is calculated based on the rotational angular velocity, the rotational radius of the heavy medium cyclone and the initial feed mass of the target mineral particles; The centrifugal acceleration is calculated by ratioing the centrifugal acceleration to the gravitational acceleration of the target mineral particles to obtain the centrifugal coefficient of the target mineral particles in the heavy medium cyclone during the rotation process.

6. The method according to claim 1, characterized in that The heavy medium cyclone is a cylindrical-conical heavy medium cyclone.

7. The method according to claim 1, characterized in that The heavy medium suspension is a mixture of liquid and solid particles.

8. A heavy medium beneficiation automatic control system, characterized in that: include: An acquisition module, used to acquire a calibrated flow rate of a heavy medium suspension when the heavy medium cyclone separates target mineral particles; A processing module, used for increasing the flow rate of the heavy medium suspension from the initial flow rate gradient to the calibrated flow rate during the separation of target mineral particles, and collecting the axial velocity of the fluid in the inner cyclone zone and the radial velocity of the fluid in the outer cyclone zone in the heavy medium cyclone after each increase in the flow rate gradient; The processing module is further used to determine the first dynamic change characteristics of the target mineral particles when they are separated in the inner cyclonic flow zone in the heavy medium cyclone according to the first density field distribution of the fluid in the inner cyclonic flow zone at various axial velocities, and to determine the second dynamic change characteristics of the target mineral particles when they are separated in the outer cyclonic flow zone according to the second density field distribution of the fluid in the outer cyclonic flow zone in the heavy medium cyclone at various radial velocities; The processing module is further used to calculate the centrifugal coefficient of the target mineral particles in the heavy medium cyclone during the rotation process, and determine the separation degree of the target mineral particles in the heavy medium cyclone through the first dynamic change characteristic, the second dynamic change characteristic and the centrifugal coefficient; An execution module is used to control the valve opening of the heavy medium suspension inlet in the heavy medium cyclone based on the separation degree.

9. A computer device, characterized in that: The computer device includes a memory and a processor, the memory stores codes, and the processor is configured to obtain the codes and execute the automatic control method for heavy medium beneficiation according to any one of claims 1 to 7.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the automatic control method for heavy medium beneficiation as described in any one of claims 1 to 7 is implemented.

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