Spiral separator and method

Abstract

The present application provides a spiral separator and method, which monitors the feed flow rate of the spiral separator; determines the first flow field area and the second flow field area of ​​the spiral separator based on the feed flow rate and the particle properties of the ore particle mixture, determines the delay period and particle distribution characteristics of the ore particle mixture in the first flow field area when it is excited by water flow; determines the water flow influence of the spiral separator when the ore particle mixture is excited by water flow in the second flow field area by combining the particle distribution characteristics with the flow velocity calibration value of the water flow in the second flow field area; determines the excitation duration of the second flow field area according to the water flow influence and the particle density distribution at each time point in the delay period; and controls the water flow in the second flow field area based on the excitation duration to impact and separate the ore particle mixture. The above scheme can achieve full separation of the ore particle mixture under the influence of the non-uniformity of the ore particles, thereby improving the separation quality of the ore particles.

Description

Technical Field

[0001] The present application relates to the technical field of mining machinery, and more specifically, to a spiral separator and a method. Background Art

[0002] With the development of science and technology, the safety requirements for mining production are increasing, and the degree of intelligence of mining machinery and equipment is becoming higher and higher. Through sensor technology, data acquisition and processing, intelligent control algorithms, etc., intelligent control of mining machinery and equipment can be achieved, thereby improving the efficiency and safety of mining production.

[0003] The spiral separator is a traditional mining machinery and equipment used for sorting solid materials. The spiral separator washes and separates ore particles mainly based on the physical properties of the ore particles. First, the ore is broken into small particles, and then the ore particles are separated by density through the spiral separator using physical principles such as gravity and centrifugal force to obtain high-grade ore particles, thereby improving the utilization efficiency of ore resources. However, when the spiral separator sorts the ore particles, it is affected by the heterogeneity of the ore particles (that is, the particle group lacks consistency in particle size and density properties). When the ore particle mixture enters the spiral separator for separation, as the spiral shaft in the spiral groove rotates, the particle residence time in the spiral groove is shortened, and there is not enough time for full stratification and separation, resulting in a decrease in the separation accuracy of the ore particles. Therefore, how to fully separate the ore particle mixture under the influence of the heterogeneity of the ore particles and thus improve the separation quality of the ore particles has become a difficult problem faced by the industry. Summary of the invention

[0004] The present application provides a spiral separator and method, which can fully separate an ore particle mixture under the influence of the non-uniformity of the ore particles, thereby improving the separation quality of the ore particles.

[0005] In a first aspect, the present application provides a particle separation method for a spiral separator, comprising the following steps:

[0006] Conveying the ore particle mixture to be separated into a spiral separator at a predetermined speed, and monitoring the feed flow rate of the spiral separator;

[0007] Determine a first flow field region and a second flow field region when separating ore particles in the spiral separator based on the feed flow rate and the particle properties of the ore particle mixture, and determine a delay period and particle distribution characteristics when the ore particle mixture is excited by water flow in the first flow field region;

[0008] Determining the influence of water flow when the spiral separator performs water flow excitation on the ore particle mixture in the second flow field region by combining the particle distribution characteristics with the flow velocity calibration value of the water flow in the second flow field region;

[0009] Determining the excitation duration of the ore particle mixture in the second flow field region when it is excited by the constant water flow according to the water flow influence degree and the particle density distribution at each time point in the delay period;

[0010] The water flow in the second flow field region is controlled based on the excitation duration to perform impact separation on the ore particle mixture.

[0011] In some embodiments, determining the first flow field area and the second flow field area for ore particle separation in the spiral separator based on the feed flow rate and the particle properties of the ore particle mixture specifically includes:

[0012] Collecting the particle size distribution and density distribution of the ore particle mixture when entering the feeding port of the spiral separator;

[0013] determining particle properties of the ore particle mixture by means of the particle size distribution and the density distribution;

[0014] predicting particle dispersion values ​​of the ore particle mixture at different locations in the spiral separator based on the feed flow rate and the particle properties;

[0015] Determining the flow field division points of the spiral separator when separating ore particles based on the particle dispersion values ​​at various positions;

[0016] The flow field region of the spiral separator is divided by the flow field dividing points to obtain a first flow field region and a second flow field region when ore particles are separated in the spiral separator.

[0017] In some embodiments, determining the delay period and particle distribution characteristics of the ore particle mixture in the first flow field region when stimulated by water flow specifically includes:

[0018] Obtaining the time value when the particle mixture is excited by the water flow in the first flow field area and the time value when the water flow starts to flow along the pipeline;

[0019] Determine a delay period when the ore particle mixture is excited by the water flow in the first flow field area according to the time value when the particle mixture is excited by the water flow in the first flow field area and the time value when the water flow starts to flow along the pipeline;

[0020] Dividing the first flow field region into a plurality of discrete units, and obtaining the particle density of each discrete unit;

[0021] The particle distribution characteristics of the ore particle mixture in the first flow field region when stimulated by water flow are determined by the particle density of each discrete unit.

[0022] In some embodiments, determining the influence of water flow when the spiral separator performs water flow excitation on the ore particle mixture in the second flow field region by combining the particle distribution characteristics with the flow velocity calibration value of the water flow in the second flow field region specifically includes:

[0023] Obtaining a flow velocity calibration value of water flow in the second flow field area;

[0024] Obtaining a flow velocity response interval of a target separation particle in the ore particle mixture when stimulated by a water flow;

[0025] Extracting, from the flow velocity response interval, a flow velocity response increment when the spiral separator performs water flow excitation on the ore particle mixture in the second flow field region based on the particle distribution characteristics;

[0026] The water flow influence degree when the spiral separator performs water flow excitation on the ore particle mixture in the second flow field area is determined by the flow velocity response increment and the flow velocity calibration value.

[0027] In some embodiments, extracting the flow velocity response increment when the spiral separator performs water flow excitation on the ore particle mixture in the second flow field region from the flow velocity response interval based on the particle distribution characteristics specifically includes:

[0028] Obtaining the maximum particle distribution characteristics corresponding to each flow rate response value in the flow rate response interval;

[0029] Selecting a flow rate response value as a selected flow rate response value, comparing a maximum particle distribution characteristic corresponding to the selected flow rate response value with the particle distribution characteristic, and obtaining a particle distribution characteristic deviation amount corresponding to the selected flow rate response value;

[0030] Continue to determine the particle distribution characteristic deviation amount corresponding to the remaining flow rate response value;

[0031] The minimum particle distribution characteristic deviation and the maximum discrete characteristic deviation are extracted from all the particle distribution characteristic deviations, and the flow velocity response increment when the spiral separator performs water flow excitation on the ore particle mixture in the second flow field area is determined by the flow velocity response value corresponding to the minimum particle distribution characteristic deviation and the flow velocity response value corresponding to the maximum particle distribution characteristic deviation.

[0032] In some embodiments, the feed flow rate of the spiral separator is monitored by an electromagnetic flow meter.

[0033] In some embodiments, the spiral separator is a spiral ore separator.

[0034] In a first aspect, the present application provides a spiral separator, which includes a particle separation unit, wherein the particle separation unit includes:

[0035] A monitoring module, used for monitoring the feed flow rate of the spiral separator when the ore particle mixture to be separated is conveyed to the spiral separator at a predetermined speed;

[0036] A processing module, for determining a first flow field region and a second flow field region when the ore particles are separated in the spiral separator based on the feed flow rate and the particle properties of the ore particle mixture, and determining a delay period and particle distribution characteristics when the ore particle mixture is excited by water flow in the first flow field region;

[0037] The processing module is further used to determine the water flow influence degree when the spiral separator performs water flow excitation on the ore particle mixture in the second flow field area by combining the particle distribution characteristics with the flow velocity calibration value of the water flow in the second flow field area;

[0038] The processing module is further used to determine the excitation duration of the ore particle mixture in the second flow field region when it is excited by the constant water flow according to the water flow influence degree and the particle density distribution at each time point in the delay period;

[0039] An execution module is used to control the water flow in the second flow field area to perform impact separation on the ore particle mixture based on the excitation duration.

[0040] 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 particle separation method for a spiral separator.

[0041] In a fourth aspect, the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the above-mentioned particle separation method for a spiral separator is implemented.

[0042] The technical solution provided by the embodiments disclosed in this application has the following beneficial effects:

[0043] In the spiral separator and method provided in the present application, first, the ore particle mixture to be separated is conveyed to the spiral separator at a predetermined speed, and the feed flow rate of the spiral separator is monitored; secondly, based on the feed flow rate and the particle properties of the ore particle mixture, the first flow field area and the second flow field area when the ore particles are separated in the spiral separator are determined, and the delay period and particle distribution characteristics when the ore particle mixture is excited by water flow in the first flow field area are determined; further, the water flow influence degree when the spiral separator excites the ore particle mixture in the second flow field area with water flow in the second flow field area is determined by combining the particle distribution characteristics with the flow velocity calibration value of the water flow in the second flow field area; then, the excitation duration when the ore particle mixture in the second flow field area is excited by constant water flow is determined according to the water flow influence degree and the particle density distribution at each time point in the delay period; finally, the water flow in the second flow field area is controlled based on the excitation duration to perform impact separation on the ore particle mixture.

[0044] It can be seen that the present application fully separates the ore particle mixture under the influence of the ore particle non-uniformity, thereby improving the separation quality of the ore particles; firstly, based on the feed flow rate and the particle properties of the ore particle mixture, the spiral separator is divided into the first flow field area and the second flow field area when separating the ore particles, so as to adjust the water flow rate of the ore particle mixture in different partitions, so that the ore particle mixture can be quickly and evenly dispersed in the spiral groove, thereby avoiding the particle accumulation effect caused by the ore particle non-uniformity; secondly, the delay period and particle distribution characteristics of the ore particle mixture in the first flow field area when it is excited by the water flow are determined, so as to effectively analyze the inflow of the ore particle mixture in the time delay period and the current dispersion state and separation degree of the ore particle mixture, thereby providing conditions for improving the separation efficiency of the ore particle mixture. Part; further, based on the particle distribution characteristics combined with the flow velocity calibration value of the water flow in the second flow field area, the water flow influence degree of the second flow field area is determined to optimize the optimal water flow velocity in the second flow field area, thereby improving the sorting efficiency of the ore particle mixture; then, according to the water flow influence degree and the particle density distribution at each time point in the delay period, the action time of the ore particle mixture when it is excited by the constant water flow is determined to achieve sufficient stratification and separation of the ore particle mixture, thereby avoiding the problem of insufficient separation caused by the short residence time of the particles in the spiral groove; finally, based on the action time, the water flow in the second flow field area is controlled to impact and separate the ore particle mixture; in summary, the technical solution provided by the present application can fully separate the ore particle mixture under the influence of the non-uniformity of the ore particles, thereby improving the separation quality of the ore particles. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1is an exemplary flow chart of a particle separation method for a spiral separator according to some embodiments of the present application;

[0046] Figure 2 is an exemplary flow chart for determining a first flow field area and a second flow field area according to some embodiments of the present application;

[0047] Figure 3 is an exemplary flow chart for determining the water flow influence degree according to some embodiments of the present application;

[0048] Figure 4 is a schematic structural diagram of a particle separation unit according to some embodiments of the present application;

[0049] Figure 5 It is a schematic diagram of the structure of a computer device for implementing a particle separation method for a spiral separator according to some embodiments of the present application. DETAILED DESCRIPTION

[0050] 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.

[0051] refer to Figure 1 , which is an exemplary flow chart of a particle separation method for a spiral separator according to some embodiments of the present application. The particle separation method 100 for a spiral separator mainly includes the following steps:

[0052] In step 101, a mixture of ore particles to be separated is conveyed to a spiral separator at a predetermined speed, and the feed flow rate of the spiral separator is monitored.

[0053] In a specific implementation, the spiral separator can be a spiral ore separator, which conveys the ore particle mixture to be separated into the spiral separator at a predetermined speed, and monitors the feed flow rate of the spiral separator by an electromagnetic flowmeter. In addition, in other embodiments, other sensors can also be used to monitor the feed flow rate of the spiral separator, which is not limited here.

[0054] It should be noted that the ore particle mixture in the present application refers to a material collection of various particles and impurities; the spiral separator in the present application is a device that uses the movement difference of particles in a rotating spiral trough to achieve ore sorting, and is mainly composed of a feeding device, a spiral trough, a bracket, a water flow nozzle, a driving device and a discharging device; the feed flow rate in the present application refers to the amount of the ore particle mixture entering the spiral separator per unit time. The feed flow rate intuitively reflects the speed at which the ore particle mixture enters the sorting system, and is a key parameter in the separation process of the ore particle mixture.

[0055] In step 102, the first flow field area and the second flow field area for ore particle separation in the spiral separator are determined based on the feed flow rate and the particle properties of the ore particle mixture, and the delay period and particle distribution characteristics of the ore particle mixture in the first flow field area when it is excited by water flow are determined.

[0056] In some embodiments, reference Figure 2 As shown in the figure, this figure is an exemplary flow chart for determining the first flow field area and the second flow field area according to some embodiments of the present application. In this embodiment, the first flow field area and the second flow field area for ore particle separation in the spiral separator based on the feed flow rate and the particle properties of the ore particle mixture can be determined by the following steps:

[0057] First, in step 1021, the particle size distribution and density distribution of the ore particle mixture when entering the feed port of the spiral separator are collected;

[0058] Next, in step 1022, the particle properties of the ore particle mixture are determined by the particle size distribution and the density distribution;

[0059] Further, in step 1023, the particle dispersion values ​​of the ore particle mixture at different positions in the spiral separator are predicted based on the feed flow rate and the particle properties;

[0060] Then, in step 1024, the flow field division points of the spiral separator when performing ore particle separation are determined based on the particle dispersion values ​​at various positions;

[0061] Finally, in step 1025, the flow field region of the spiral separator is divided by the flow field division points to obtain a first flow field region and a second flow field region when ore particles are separated in the spiral separator.

[0062] In specific implementation, the particle size distribution of the ore particle mixture when entering the feeding port of the spiral separator can be collected by a laser particle size sensor, and the density distribution of the ore particle mixture when entering the feeding port of the spiral separator can be collected by an X-ray scanning sensor. In addition, in other embodiments, other collection sensors can be used to collect the particle size distribution and density distribution of the ore particle mixture when entering the feeding port of the spiral separator. There is no limitation here. In this embodiment, the particle size distribution represents the distribution statistical parameters of the particle size in the ore particle mixture, and the density distribution in this embodiment represents the spatial density of the particles in the ore particle mixture.

[0063] In a specific implementation, the particle properties of the ore particle mixture are determined by the particle size distribution and the density distribution, that is, the particle size distribution and the density distribution are weighted and summed, and the result of the weighted summation is used as the particle properties of the ore particle mixture, wherein the weight values ​​of the particle size distribution and the density distribution are set to 0.68 and 0.32 respectively according to the degree of influence of the particle size distribution and the density distribution on the ore particle mixture. In addition, they can also be set according to actual needs, which is not limited here. In addition, in other embodiments, other calculation methods can also be used to calculate the particle properties of the ore particle mixture, which is not limited here.

[0064] It should be noted that the particle properties in the present application are the distribution properties of various particles in the ore particle mixture, that is, the comprehensive index of both the particle size distribution and the density distribution of the ore particle mixture.

[0065] In specific implementation, the particle distribution values ​​of the ore particle mixture at different positions in the spiral separator are predicted based on the feed flow rate and the particle properties, that is, a pre-trained particle distribution prediction model is obtained, the feed flow rate and the particle properties are input as input parameters into the particle distribution prediction model, and the particle distribution prediction model outputs the particle distribution values ​​of the ore particle mixture at different positions in the spiral separator, which will not be repeated here.

[0066] It should be noted that a pre-trained particle dispersion prediction model can be obtained through the storage database of the spiral separator, and the pre-trained particle dispersion prediction model is pre-trained through a neural network, that is, a large amount of historical particle dispersion data of ore particle mixtures at different positions in the spiral separator (such as the initial state of the particles, environmental parameters, final dispersion position, etc.) are collected as training samples, and a neural network model is constructed. The input layer inputs the physical properties of the particles (such as particle size, density, etc.) and environmental parameters (such as wind speed, temperature, etc.), the hidden layer performs nonlinear transformation on the input parameters, and the output layer outputs the dispersion results of the particles. In addition, in other embodiments, the computational fluid dynamics (CFD) algorithm and the discrete phase model (DPM) coupling algorithm can also be used to pre-train the particle dispersion prediction model, which is not limited here.

[0067] It should also be noted that the particle dispersion value in this embodiment represents the degree of dispersion of the ore particle mixture inside the spiral separator, that is, the larger the particle dispersion value, the greater the degree of dispersion of the ore particle mixture inside the spiral separator, and the smaller the particle dispersion value, the smaller the degree of dispersion of the ore particle mixture inside the spiral separator. By determining the particle dispersion value, the degree of particle separation and the degree of stacking inside the spiral separator can be effectively identified, thereby stimulating the mechanical energy flow of the ore particle mixture in different areas according to the degree of particle separation and the degree of stacking to change the separation state of the ore particle mixture, thereby avoiding the impact of insufficient separation of the ore particle mixture.

[0068] In specific implementation, the flow field division point of the spiral separator when separating ore particles is determined based on the particle distribution value at each position, that is: the median is extracted for all the particle distribution values, and the position point corresponding to the particle distribution value obtained by the median extraction is used as the flow field division point of the spiral separator when separating ore particles. In addition, in other embodiments, other processing methods can be used to obtain the flow field division point of the spiral separator when separating ore particles, which will not be repeated here. In this embodiment, the flow field division point represents the division point used to divide the entire flow field of the spiral separator into several areas.

[0069] In a specific implementation, the flow field area of ​​the spiral separator is divided by the flow field dividing point to obtain the first flow field area and the second flow field area when the ore particles are separated in the spiral separator, that is, the flow field area of ​​the spiral separator is divided by the flow field dividing point, and the upper half of the flow field area is used as the first flow field area when the ore particles are separated in the spiral separator, and the lower half of the flow field area is used as the second flow field area when the ore particles are separated in the spiral separator, wherein the flow field area represents the area between the feed port and the discharge port of the spiral separator, which area will be impacted by the water flow when separating the ore particle mixture, and therefore, the area between the feed port and the discharge port of the spiral separator is used as the flow field area.

[0070] It should be noted that the first flow field area in the present application refers to the area where the ore particle mixture in the spiral separator is initially dispersed but not significantly separated after being impacted by water flow. This area is the upper half of the flow field area and is close to the feed port; the second flow field area in the present application refers to the area where the ore particle mixture in the spiral separator is significantly separated after being impacted by water flow. This area is the lower half of the flow field area and is close to the discharge port. The first flow field area and the second flow field area are obtained by dividing the flow field division points; the first flow field area is usually the area where the ore particle mixture is initially separated, and the ore particle mixture is usually more aggregated in this area. The second flow field area is usually the area where the ore particle mixture is significantly separated, and the ore particle mixture is usually more dispersed in this area. In order to ensure that the ore particle mixture can be evenly dispersed in the initial area and can fully separate particles in the significantly separated area, by determining the first flow field area and the second flow field area, the water flow rate of the ore particle mixture in different partitions can be effectively adjusted, so that the ore particle mixture can be quickly dispersed and separated in the spiral groove to avoid particle accumulation.

[0071] It should also be noted that water flow excitation in the present application refers to the process in which the ore particle mixture is affected by water flow. When the ore particle mixture is excited by water flow, the ore particle mixture will be dispersed due to the impact of the water flow, thereby achieving separation of the ore particle mixture.

[0072] In some embodiments, the following steps may be used to determine the delay period and particle distribution characteristics of the ore particle mixture in the first flow field region when the ore particle mixture is stimulated by water flow, namely:

[0073] Obtaining the time value when the particle mixture is excited by the water flow in the first flow field area and the time value when the water flow starts to flow along the pipeline;

[0074] Determine a delay period when the ore particle mixture is excited by the water flow in the first flow field area according to the time value when the particle mixture is excited by the water flow in the first flow field area and the time value when the water flow starts to flow along the pipeline;

[0075] Dividing the first flow field region into a plurality of discrete units, and obtaining the particle density of each discrete unit;

[0076] The particle distribution characteristics of the ore particle mixture in the first flow field region when stimulated by water flow are determined by the particle density of each discrete unit.

[0077] In specific implementation, the time value when the particle mixture is excited by the water flow in the first flow field area and the time value when the water flow starts to flow along the pipeline can be obtained through the time synchronization system in the spiral separator, which will not be repeated here.

[0078] In specific implementation, the delay period when the ore particle mixture is excited by the water flow in the first flow field area is determined according to the time value when the particle mixture is excited by the water flow in the first flow field area and the time value when the water flow starts to flow along the pipeline, that is, the time period between the time value when the ore particle mixture is excited by the water flow in the first flow field area and the time value when the water flow starts to flow along the pipeline is used as the delay period when the ore particle mixture is excited by the water flow in the first flow field area.

[0079] It should be noted that the delay period in the present application refers to the time delay before the ore particle mixture begins to respond and move under the stimulation of water flow. In the process of separating the ore particle mixture, it is usually affected by the time delay, so that the water flow does not stimulate the ore particle mixture in time, which may cause the accumulation of the ore particle mixture, thereby affecting the separation result. Therefore, by determining the delay period, the inflow of the ore particle mixture in the time delay period can be effectively analyzed, so as to make corresponding adjustments to improve the separation efficiency.

[0080] In specific implementation, the first flow field area is divided into multiple discrete units through the tetrahedron network in the grid division method, and the particle density of each discrete unit is obtained through the X-ray scanning sensor. In this embodiment, the discrete unit represents a sub-area of ​​the first flow field area. In this embodiment, the particle density represents the compactness of particles in the ore particle mixture in space, that is, the greater the particle density, the greater the compactness of particles in the ore particle mixture in space, and the smaller the particle density, the smaller the compactness of particles in the ore particle mixture in space.

[0081] In specific implementation, the particle distribution characteristics of the ore particle mixture in the first flow field area when excited by water flow are determined by the particle density of each discrete unit, that is: the standard deviation and mean of all particle densities are calculated, the ratio of the standard deviation to the mean is calculated, and the ratio calculation result is used as the particle distribution characteristics of the ore particle mixture in the first flow field area when excited by water flow. In addition, in other embodiments, other calculation methods can also be used to calculate the particle distribution characteristics of the ore particle mixture in the first flow field area when excited by water flow, which is not limited here.

[0082] It should be noted that the particle distribution characteristics in the present application represent the dynamic distribution amount of particles in the ore particle mixture during the separation process, that is, the larger the particle distribution characteristics, the larger the dynamic distribution amount of particles in the ore particle mixture during the separation process, and the smaller the particle distribution characteristics, the smaller the dynamic distribution amount of particles in the ore particle mixture during the separation process. By determining the particle distribution characteristics, the dispersion state and separation degree of the current ore particle mixture can be effectively analyzed, thereby providing conditions for further improving the separation efficiency of the ore particle mixture in the future.

[0083] In step 103, the influence of water flow when the spiral separator performs water flow excitation on the ore particle mixture in the second flow field area is determined by combining the particle distribution characteristics with the flow velocity calibration value of the water flow in the second flow field area.

[0084] In some embodiments, reference Figure 3 As shown in the figure, this figure is an exemplary flow chart for determining the water flow influence degree according to some embodiments of the present application. In this embodiment, the water flow influence degree when the spiral separator performs water flow excitation on the ore particle mixture in the second flow field area is determined by combining the particle distribution characteristics with the flow velocity calibration value of the water flow in the second flow field area. The following steps can be used to achieve it:

[0085] First, in step 1031, a flow velocity calibration value of the water flow in the second flow field area is obtained;

[0086] Next, in step 1032, a flow rate response interval of the target separation particles in the ore particle mixture when stimulated by water flow is obtained;

[0087] Then, in step 1033, based on the particle distribution characteristics, a flow velocity response increment when the spiral separator performs water flow excitation on the ore particle mixture in the second flow field region is extracted from the flow velocity response interval;

[0088] Finally, in step 1034, the water flow influence degree when the spiral separator performs water flow excitation on the ore particle mixture in the second flow field region is determined by the flow velocity response increment and the flow velocity calibration value.

[0089] In specific implementation, the flow velocity calibration value of the water flow in the second flow field area can be obtained through the storage database of the spiral separator. The flow velocity calibration value in this application represents the pre-calibrated water flow velocity value of the water flow in the second flow field area, which can be set according to actual needs and is not limited here.

[0090] In a specific implementation, the velocity response interval of the target separation particles in the ore particle mixture when stimulated by water flow is obtained, that is: first, the target separation particles are obtained from the ore particle mixture according to the particle separation requirements, and the velocity response interval of the target separation particles when stimulated by water flow is obtained from the storage database of the spiral separator based on the separation characteristics of the target separation particles under water flow stimulation. For example, when the separation efficiency of the target separation particles when stimulated by water flow is maximum, the corresponding velocity response value is 0.5 m / s, then the velocity response interval of the target separation particles when stimulated by water flow is set to an interval between 0.4 m / s and 0.6 m / s. In this embodiment, the velocity response interval represents the velocity interval where the separation efficiency of the target separation particles is maximum. By determining the velocity response interval, the optimal water flow velocity of the ore particle mixture during separation can be obtained more accurately.

[0091] In some embodiments, based on the particle distribution characteristics, the flow velocity response increment when the spiral separator performs water flow excitation on the ore particle mixture in the second flow field region can be extracted from the flow velocity response interval by the following steps, namely:

[0092] Obtaining the maximum particle distribution characteristics corresponding to each flow rate response value in the flow rate response interval;

[0093] Selecting a flow rate response value as a selected flow rate response value, comparing a maximum particle distribution characteristic corresponding to the selected flow rate response value with the particle distribution characteristic, and obtaining a particle distribution characteristic deviation amount corresponding to the selected flow rate response value;

[0094] Continue to determine the particle distribution characteristic deviation amount corresponding to the remaining flow velocity response value;

[0095] The minimum particle distribution characteristic deviation and the maximum discrete characteristic deviation are extracted from all the particle distribution characteristic deviations, and the flow velocity response increment when the spiral separator performs water flow excitation on the ore particle mixture in the second flow field area is determined by the flow velocity response value corresponding to the minimum particle distribution characteristic deviation and the flow velocity response value corresponding to the maximum particle distribution characteristic deviation.

[0096] In specific implementation, the maximum particle distribution characteristics corresponding to each flow velocity response value in the flow velocity response interval can be obtained through the sorting log of the spiral sorter. The maximum particle distribution characteristics are obtained by fitting the separation state of the ore particle mixture under different flow velocity response values ​​through machine learning. It will not be repeated here. In this embodiment, the maximum particle distribution characteristics represent the maximum dynamic distribution amount of the ore particle mixture under the corresponding flow velocity response value.

[0097] In specific implementation, the maximum particle distribution feature corresponding to the selected flow velocity response value is compared with the particle distribution feature to obtain the particle distribution feature deviation corresponding to the selected flow velocity response value, that is: the absolute difference between the maximum particle distribution feature corresponding to the selected flow velocity response value and the particle distribution feature is calculated, and the absolute difference calculation result is used as the particle distribution feature deviation corresponding to the selected flow velocity response value. In this implementation example, the particle distribution feature deviation represents the deviation between the two particle distribution features.

[0098] In specific implementation, the velocity response increment when the spiral separator performs water flow excitation on the ore particle mixture in the second flow field area is determined by the velocity response value corresponding to the minimum particle distribution characteristic deviation and the velocity response value corresponding to the maximum particle distribution characteristic deviation, that is, the velocity response value corresponding to the maximum particle distribution characteristic deviation and the velocity response value corresponding to the minimum particle distribution characteristic deviation are calculated, and the difference calculation result is used as the velocity response increment when the spiral separator performs water flow excitation on the ore particle mixture in the second flow field area. In addition, in other embodiments, other calculation methods can also be used to calculate the velocity response increment when the spiral separator performs water flow excitation on the ore particle mixture in the second flow field area. There is no limitation here. In this embodiment, the velocity response increment represents the amount by which the water flow velocity in the second flow field area needs to be increased.

[0099] In specific implementation, the water flow influence degree of the spiral separator when water flow excites the ore particle mixture in the second flow field area is determined by the flow velocity response increment and the flow velocity calibration value, that is, the flow velocity response increment and the flow velocity calibration value are summed, and the sum is used as the water flow influence degree of the spiral separator when water flow excites the ore particle mixture in the second flow field area. In addition, in other embodiments, other calculation methods can also be used to calculate the water flow influence degree of the spiral separator when water flow excites the ore particle mixture in the second flow field area, which is not limited here.

[0100] It should be noted that the water flow influence degree in the present application indicates the degree to which the water flow affects the movement and distribution of the ore particle mixture when the water flows, that is, the greater the water flow influence degree, the greater the ability to affect the movement and distribution of the ore particle mixture in the fluid flow, and the smaller the water flow influence degree, the smaller the ability to affect the movement and distribution of the ore particle mixture in the fluid flow. The water flow influence degree directly affects the movement trajectory and separation effect of the ore particles in the spiral sorter. By determining the water flow influence degree, the optimal water flow velocity in the second flow field area can be optimized, thereby improving the sorting efficiency of the ore particle mixture.

[0101] In step 104, the excitation duration of the ore particle mixture in the second flow field region when excited by the constant water flow is determined according to the water flow influence and the particle density distribution at each time point in the delay period.

[0102] In some embodiments, the excitation duration of the ore particle mixture in the second flow field region when excited by the constant water flow can be determined according to the water flow influence degree and the particle density distribution at each time point in the delay period by the following steps, namely:

[0103] Obtaining particle density distribution at each time point in the delay period;

[0104] The density distribution curve is obtained by fitting the particle density distribution at each time point;

[0105] Determining a first density variation trend of the ore particle mixture in the first flow field region by using the density distribution curve;

[0106] Predicting the second density variation trend of the second flow field area at different prediction time lengths based on the water flow influence degree;

[0107] The second density change trend at each predicted time length is compared with the first density change trend in order of time length. When the trend difference between the second density change trend and the first density change trend is less than a threshold, the predicted time length corresponding to the second density change trend is used as the excitation time length when the ore particle mixture in the second flow field area is excited by a constant water flow.

[0108] In a specific implementation, the particle density distribution at each time point in the delay period can be obtained by an X-ray scanning sensor, and the particle density distribution represents the particle compactness of the ore particle mixture at different time points in the first flow field area.

[0109] In specific implementation, a density distribution curve is obtained by fitting the particle density distribution at each time point, that is, each time point is used as an element of the horizontal axis, and the particle density distribution corresponding to each time point is used as an element of the vertical axis to obtain a density distribution curve. In this embodiment, the density distribution curve represents a trend curve describing the particle density distribution at different time points.

[0110] In specific implementation, the first density change trend of the ore particle mixture in the first flow field area is determined by the density distribution curve, that is, the slope of the density distribution curve is calculated, and the slope calculation result is used as the first density change trend of the ore particle mixture in the first flow field area. In addition, in other embodiments, other calculation methods can be used to calculate the first density change trend of the ore particle mixture in the first flow field area, which is not limited here. In this embodiment, the first density change trend represents the change trend of the particle density distribution in the first flow field area. By determining the first density change trend, the change of the ore particle mixture in the first flow field area can be effectively identified.

[0111] In specific implementation, the water flow influence degree can be input as a boundary condition into a computational fluid dynamics model, and the interaction parameters between the ore particle mixture and the water flow (for example, the drag and buoyancy of the ore particle mixture) are added. The computational fluid dynamics model then outputs the second density change trend of the second flow field area at different prediction time lengths. In this embodiment, the second density change trend represents the change trend of the particle density distribution in the second flow field area. By determining the second density change trend, the change of the ore particle mixture in the second flow field area can be effectively identified.

[0112] It should be noted that the excitation duration in the present application refers to the duration of time that the ore particle mixture is acted upon by the water flow. The greater the excitation duration, the longer the ore particle mixture is acted upon by the water flow, and the shorter the excitation duration, the shorter the ore particle mixture is acted upon by the water flow. In the sorting of the spiral separator, the separation of the ore particle mixture is achieved based on the movement difference of the particles in the spiral groove. The movement of the particles is affected by the combined effects of gravity, centrifugal force and water flow. If the water flow is unstable, for example, the water flow velocity fluctuates, the water flow force on the particles will be different. For particles with similar density and particle size, this change may disrupt the original regular motion trajectory and make it impossible to effectively stratify and separate them according to characteristics such as density and particle size. For example, when sorting an ore mixture containing fine-grained chalcopyrite and quartz, unstable water flow may cause the chalcopyrite particles to be washed to the inside or outside of the spiral groove, making it impossible to achieve stable separation. Therefore, by determining the excitation duration, the ore particle mixture can be fully stratified and separated, thereby avoiding the problem of insufficient separation caused by the particles staying in the spiral groove for too short a time.

[0113] In step 105, the water flow in the second flow field region is controlled based on the excitation duration to perform impact separation on the ore particle mixture.

[0114] In a specific implementation, the water flow in the second flow field area is controlled based on the excitation duration to impact the ore particle mixture. According to the effect of the water flow impact, the ore particle mixture will be collected separately at the discharge port of the spiral separator, thereby obtaining the separation result of the ore particle mixture by the spiral separator. For example, the outer discharge port collects useful mineral particles with a larger density, and the inner discharge port collects gangue particles with a smaller density.

[0115] In addition, in another aspect of the present application, in some embodiments, the present application provides a spiral separator, the spiral separator comprising a particle separation unit, referring to Figure 4 , which is a schematic diagram of the structure of a particle separation unit according to some embodiments of the present application, the particle separation unit 200 includes: a monitoring module 201, a processing module 202 and an execution module 203, which are described as follows:

[0116] Monitoring module 201, in the present application, the monitoring module 201 is mainly used to monitor the feed flow rate of the spiral separator when the ore particle mixture to be separated is transported to the spiral separator at a predetermined speed;

[0117] Processing module 202, in the present application, the processing module 202 is mainly used to determine the first flow field area and the second flow field area when the ore particles are separated in the spiral separator based on the feed flow rate and the particle properties of the ore particle mixture, and determine the delay period and particle distribution characteristics of the ore particle mixture in the first flow field area when it is excited by the water flow;

[0118] The processing module 202 is further used to determine the water flow influence degree when the spiral separator performs water flow excitation on the ore particle mixture in the second flow field area by combining the particle distribution characteristics with the flow velocity calibration value of the water flow in the second flow field area;

[0119] In addition, the processing module 202 is further used to determine the excitation duration of the ore particle mixture in the second flow field area when it is excited by the constant water flow according to the water flow influence degree and the particle density distribution at each time point in the delay period;

[0120] The execution module 203 in the present application is mainly used to control the water flow in the second flow field area based on the excitation duration to perform impact separation on the ore particle mixture.

[0121] 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 particle separation method for a spiral separator.

[0122] In some embodiments, reference Figure 5 , which is a schematic diagram of the structure of a computer device for implementing a particle separation method for a spiral separator according to some embodiments of the present application. The particle separation method for a spiral separator in the above embodiment can be achieved by 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.

[0123] 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 particle separation method for the spiral separator in the present application.

[0124] The communication bus 302 may be used to transmit information between the above-mentioned components.

[0125] 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.

[0126] 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 particle separation method for the spiral separator 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.

[0127] 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.

[0128] 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).

[0129] 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.

[0130] In addition, the present application also provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the above-mentioned particle separation method for a spiral separator is implemented.

[0131] 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.

[0132] 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 particle separation method for a spiral separator, characterized in that: The steps include: Conveying the ore particle mixture to be separated into a spiral separator at a predetermined speed, and monitoring the feed flow rate of the spiral separator; Determine a first flow field region and a second flow field region when separating ore particles in the spiral separator based on the feed flow rate and the particle properties of the ore particle mixture, and determine a delay period and particle distribution characteristics when the ore particle mixture is excited by water flow in the first flow field region; Determining the influence of water flow when the spiral separator performs water flow excitation on the ore particle mixture in the second flow field region by combining the particle distribution characteristics with the flow velocity calibration value of the water flow in the second flow field region; Determining the excitation duration of the ore particle mixture in the second flow field region when it is excited by the constant water flow according to the water flow influence degree and the particle density distribution at each time point in the delay period; Controlling the water flow in the second flow field region based on the excitation duration to perform impact separation on the ore particle mixture; The following steps are specifically used to determine the excitation duration of the ore particle mixture in the second flow field region when it is excited by the constant water flow according to the water flow influence degree and the particle density distribution at each time point in the delay period, namely: Obtaining particle density distribution at each time point in the delay period; The density distribution curve is obtained by fitting the particle density distribution at each time point; Determining a first density variation trend of the ore particle mixture in the first flow field region by using the density distribution curve; Predicting the second density variation trend of the second flow field area at different prediction time lengths based on the water flow influence degree; The second density change trend at each predicted time length is compared with the first density change trend in order of time length. When the trend difference between the second density change trend and the first density change trend is less than a threshold, the predicted time length corresponding to the second density change trend is used as the excitation time length when the ore particle mixture in the second flow field area is excited by a constant water flow.

2. The method according to claim 1, characterized in that Determining the first flow field area and the second flow field area for ore particle separation in the spiral separator based on the feed flow rate and the particle properties of the ore particle mixture specifically includes: Collecting the particle size distribution and density distribution of the ore particle mixture when entering the feeding port of the spiral separator; determining particle properties of the ore particle mixture by means of the particle size distribution and the density distribution; predicting particle dispersion values ​​of the ore particle mixture at different locations in the spiral separator based on the feed flow rate and the particle properties; Determining the flow field division points of the spiral separator when separating ore particles based on the particle dispersion values ​​at various positions; The flow field region of the spiral separator is divided by the flow field dividing points to obtain a first flow field region and a second flow field region when ore particles are separated in the spiral separator.

3. The method according to claim 1, characterized in that Determining the delay period and particle distribution characteristics of the ore particle mixture in the first flow field region when being stimulated by the water flow specifically includes: Obtaining the time value when the particle mixture is excited by the water flow in the first flow field area and the time value when the water flow starts to flow along the pipeline; Determine a delay period when the ore particle mixture is excited by the water flow in the first flow field area according to the time value when the particle mixture is excited by the water flow in the first flow field area and the time value when the water flow starts to flow along the pipeline; Dividing the first flow field region into a plurality of discrete units, and obtaining the particle density of each discrete unit; The particle distribution characteristics of the ore particle mixture in the first flow field region when stimulated by water flow are determined by the particle density of each discrete unit.

4. The method according to claim 1, characterized in that Determining the water flow influence when the spiral separator performs water flow excitation on the ore particle mixture in the second flow field region by combining the particle distribution characteristics with the flow velocity calibration value of the water flow in the second flow field region specifically includes: Obtaining a flow velocity calibration value of water flow in the second flow field area; Obtaining a flow velocity response interval of a target separation particle in the ore particle mixture when stimulated by a water flow; Extracting, from the flow velocity response interval, a flow velocity response increment when the spiral separator performs water flow excitation on the ore particle mixture in the second flow field region based on the particle distribution characteristics; The water flow influence degree when the spiral separator performs water flow excitation on the ore particle mixture in the second flow field area is determined by the flow velocity response increment and the flow velocity calibration value.

5. The method according to claim 4, characterized in that Extracting the flow velocity response increment when the spiral separator performs water flow excitation on the ore particle mixture in the second flow field region from the flow velocity response interval based on the particle distribution characteristics specifically includes: Obtaining the maximum particle distribution characteristics corresponding to each flow rate response value in the flow rate response interval; Selecting a flow rate response value as a selected flow rate response value, comparing a maximum particle distribution characteristic corresponding to the selected flow rate response value with the particle distribution characteristic, and obtaining a particle distribution characteristic deviation amount corresponding to the selected flow rate response value; Continue to determine the particle distribution characteristic deviation amount corresponding to the remaining flow velocity response value; The minimum particle distribution characteristic deviation and the maximum discrete characteristic deviation are extracted from all the particle distribution characteristic deviations, and the flow velocity response increment when the spiral separator performs water flow excitation on the ore particle mixture in the second flow field area is determined by the flow velocity response value corresponding to the minimum particle distribution characteristic deviation and the flow velocity response value corresponding to the maximum particle distribution characteristic deviation.

6. The method according to claim 1, characterized in that The feed flow rate of the spiral separator is monitored by an electromagnetic flowmeter.

7. The method according to claim 1, characterized in that The spiral separator is a spiral ore separator.

8. A spiral separator, which uses the method according to any one of claims 1 to 7 to separate particles, the spiral separator comprising a particle separation unit, characterized in that: The particle separation unit comprises: A monitoring module, used for monitoring the feed flow rate of the spiral separator when the ore particle mixture to be separated is conveyed to the spiral separator at a predetermined speed; A processing module, for determining a first flow field region and a second flow field region when the ore particles are separated in the spiral separator based on the feed flow rate and the particle properties of the ore particle mixture, and determining a delay period and particle distribution characteristics when the ore particle mixture is excited by water flow in the first flow field region; The processing module is further used to determine the water flow influence degree when the spiral separator performs water flow excitation on the ore particle mixture in the second flow field area by combining the particle distribution characteristics with the flow velocity calibration value of the water flow in the second flow field area; The processing module is further used to determine the excitation duration of the ore particle mixture in the second flow field area when it is excited by the constant water flow according to the water flow influence degree and the particle density distribution at each time point in the delay period; An execution module is used to control the water flow in the second flow field area to perform impact separation on the ore particle mixture based on the excitation duration.

9. A computer device, characterized in that: The computer device comprises a memory and a processor, wherein the memory stores codes, and the processor is configured to obtain the codes and execute the particle separation method for a spiral separator 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 particle separation method for a spiral separator according to any one of claims 1 to 7 is implemented.

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