Intelligent control method and system for ball mill

Abstract

The invention relates to the technical field of ore grinding control, in particular to an intelligent control method and system for a ball mill, and the method comprises the steps: collecting real-time values of ore grinding parameters in the operation process of the ball mill, and setting the limit values of the raw ore grade, the ore feeding flow, the water supply flow, the operation power, the grinding sound intensity and the ore grinding concentration according to the attribute information of the raw ore; determining the working state of the ball mill based on the real-time value of the ore grinding parameter in the preset time period, wherein the working state of the ball mill comprises a normal state, a swelling state and an empty state; a target control rule is determined from preset control rules according to the working state of the ball mill, ore grinding parameters of the ball mill are controlled according to the target control rule, and the preset control rules comprise a swelling control rule, an empty control rule and a normal control rule. The limit value is set for the ore grinding parameter according to the attribute information of the raw ore, the influence of fluctuation of the ore property on the ore grinding concentration is reduced, and accurate control over the ore grinding concentration of the ball mill is achieved by setting multiple different control rules.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of grinding control, and in particular to an intelligent control method and system for a ball mill. BACKGROUND

[0002] The mineral processing industry is an important link in mineral processing, and the grinding process as a key step in the beneficiation process directly determines the beneficiation index of subsequent flotation or magnetic separation. As the core equipment of the grinding process, the ball mill is widely used in the grinding treatment of various minerals. However, the ball mill shows complex characteristics such as nonlinearity, multivariable, large inertia and strong hysteresis during operation, and is easily disturbed by changes in the properties of raw ore and ore particle size distribution. These characteristics make it challenging to regulate the operating parameters of the ball mill.

[0003] In the prior art, the operation of the ball mill mainly relies on the experience of the technical personnel, and the operator adjusts parameters such as the amount of feed ore, additional steel balls and water by observing changes in the mill current, listening to the mill sound and periodically sampling and testing, etc. This method highly depends on the professional level of the operator and has great subjectivity. In addition, the traditional ball mill control method usually uses a fixed parameter PID controller, which performs poorly when dealing with sudden changes in the properties of raw ore and is prone to overshoot or slow adjustment, making it difficult to achieve precise control of the ball mill. Therefore, how to use intelligent means to optimize the regulation of the operating parameters of the ball mill has become the key to improving the grinding efficiency and reducing energy consumption. SUMMARY

[0004] According to the above technical problems, an intelligent control method and system for a ball mill are provided. The present application mainly uses a collection module, a judgment module and a control module to collect real-time values of grinding parameters during the operation of the ball mill, determine the working state of the ball mill based on the real-time values of the grinding parameters within a preset time period, and determine the target control rule from the preset control rules according to the working state of the ball mill. The technical means adopted by the present application are as follows: An intelligent control method for a ball mill, comprising: Collecting real-time values of grinding parameters during the operation of the ball mill, and setting limits for ore grade, feed flow, water flow, running power, mill sound intensity and grinding concentration according to the attribute information of the raw ore; the grinding parameters at least include: feed flow, water flow, sand setting water flow, running power, mill sound intensity and concentrate grade; Determine the working state of the ball mill based on the real-time values of the grinding parameters within a preset time period, the working state of the ball mill includes normal state, bulging state and empty state; The target control rule is determined from preset control rules according to the working state of the ball mill, and the grinding parameters of the ball mill are controlled according to the target control rule.

[0005] Further, the working state of the ball mill is determined based on the real-time values of the grinding parameters in a preset time period, and the working state of the ball mill is determined based on the real-time values of the grinding parameters in a preset time period. In the preset time period, if the real-time value of the running power meets the first belly condition or the real-time value of the grinding sound intensity meets the second belly condition, the working state of the ball mill is determined as the belly state; if the real-time value of the running power meets the first empty condition or the real-time value of the grinding sound intensity meets the second empty condition, the working state of the ball mill is determined as the empty state; otherwise, the working state of the ball mill is determined as the normal state.

[0006] Further, the limit value includes an upper limit value and a lower limit value, and the grinding parameters of the ball mill are controlled according to the target control rule, and the grinding parameters of the ball mill are controlled according to the target control rule. If the target control rule is the belly control rule, the grinding parameters of the ball mill are controlled at least including: controlling the feed flow to be adjusted to zero, and controlling the water flow to be adjusted to the upper limit value of the water flow; If the target control rule is the empty control rule, the grinding parameters of the ball mill are controlled at least including: controlling the feed flow to be adjusted to the upper limit value of the feed flow, and controlling the water flow to be adjusted to the upper limit value of the water flow; If the target control rule is the normal control rule, the grinding parameters of the ball mill are controlled at least including: calculating the water flow target value according to the normal control rule, and controlling the water flow to be adjusted to the water flow target value.

[0007] Further, the water flow target value is calculated according to the normal control rule, and the water flow target value is calculated according to the normal control rule. The actual value of the grinding concentration is calculated based on the real-time values of the grinding parameters in a preset time period; The target value of the grinding concentration is calculated according to the normal control rule and the actual value of the grinding concentration; The water flow target value is calculated based on the target value of the grinding concentration.

[0008] Further, the normal control rule at least includes: the first control rule, the second control rule and the third control rule, the first control rule is to calculate the target value of the grinding concentration according to the limit value of the grinding concentration and the first coefficient, the second control rule is to calculate the target value of the grinding concentration according to the limit value of the grinding concentration and the second coefficient, and the third control rule is to calculate the target value of the grinding concentration according to the limit value of the grinding concentration and the third coefficient.

[0009] Further, the calculating the target value of the grinding concentration according to the normal control rule and the actual value of the grinding concentration comprises: if the real-time value of the grinding parameter and the actual value of the grinding concentration in the preset time period satisfy a first coefficient condition, calculating the target value of the grinding concentration according to the first control rule; if the real-time value of the grinding parameter and the actual value of the grinding concentration in the preset time period satisfy a second parameter condition, calculating the target value of the grinding concentration according to the second control rule; if the real-time value of the grinding parameter and the actual value of the grinding concentration in the preset time period satisfy a third parameter condition, calculating the target value of the grinding concentration according to the third control rule.

[0010] Further, the first coefficient condition at least comprises: the real-time value of the feed flow is less than or equal to a flow threshold value, the real-time value of the concentrate grade is greater than or equal to a grade threshold value, and the actual value of the grinding concentration is greater than an upper limit value of the grinding concentration; or, the real-time value of the feed flow is less than or equal to a flow threshold value, the real-time value of the concentrate grade is greater than or equal to a grade threshold value, and the real-time value of the grinding intensity is less than a lower limit value of the grinding intensity; or, the real-time value of the feed flow is less than or equal to a flow threshold value, the real-time value of the concentrate grade is greater than or equal to a grade threshold value, and the real-time value of the running power is less than a lower limit value of the running power; or, the real-time value of the feed flow is greater than a flow threshold value, and the actual value of the grinding concentration is greater than an upper limit value of the grinding concentration; or, the real-time value of the feed flow is greater than a flow threshold value, and the real-time value of the grinding intensity is less than a lower limit value of the grinding intensity; or, the real-time value of the feed flow is greater than a flow threshold value, and the real-time value of the running power is less than a lower limit value of the running power.

[0011] Further, the second coefficient condition at least comprises: the real-time value of the feed flow is less than or equal to a flow threshold value, the real-time value of the concentrate grade is less than a grade threshold value, and the actual value of the grinding concentration is greater than or equal to an upper limit value of the grinding concentration; or, the real-time value of the feed flow is less than or equal to a flow threshold value, the real-time value of the concentrate grade is less than a grade threshold value, and the real-time value of the grinding intensity is less than or equal to a lower limit value of the grinding intensity; or, the real-time value of the feed flow is less than or equal to a flow threshold value, the real-time value of the concentrate grade is less than a grade threshold value, and the real-time value of the running power is less than or equal to a lower limit value of the running power; or, the real-time value of the feed flow is less than or equal to a flow threshold value, the real-time value of the concentrate grade is greater than or equal to a grade threshold value, the actual value of the grinding concentration is greater than or equal to a lower limit value of the grinding concentration, and the actual value of the grinding concentration is less than or equal to an upper limit value of the grinding concentration; or, the real-time value of the feed flow rate is less than or equal to the flow rate threshold value, the real-time value of the concentrate grade is greater than or equal to the grade threshold value, the real-time value of the mill sound intensity is greater than or equal to the lower limit value of the mill sound intensity, and the real-time value of the operating power is greater than or equal to the lower limit value of the operating power; or, the real-time value of the feed flow rate is greater than the flow rate threshold value, the real-time value of the mill concentration is greater than or equal to the lower limit value of the mill concentration, and the real-time value of the mill concentration is less than or equal to the upper limit value of the mill concentration; or, the real-time value of the feed flow rate is greater than the flow rate threshold value, the real-time value of the mill sound intensity is greater than or equal to the lower limit value of the mill sound intensity, and the real-time value of the operating power is greater than or equal to the lower limit value of the operating power.

[0012] Further, the third coefficient at least includes: the real-time value of the feed flow rate is less than or equal to the flow rate threshold value, the real-time value of the concentrate grade is less than the grade threshold value, and the real-time value of the mill concentration is less than the upper limit value of the mill concentration; or, the real-time value of the feed flow rate is less than or equal to the flow rate threshold value, the real-time value of the concentrate grade is less than the grade threshold value, the real-time value of the mill sound intensity is greater than the lower limit value of the mill sound intensity, and the value of the operating power is greater than the lower limit value of the operating power; or, the real-time value of the feed flow rate is less than or equal to the flow rate threshold value, the real-time value of the concentrate grade is greater than or equal to the grade threshold value, and the real-time value of the mill concentration is less than the lower limit value of the mill concentration; or, the real-time value of the feed flow rate is greater than the flow rate threshold value, and the real-time value of the mill concentration is less than the lower limit value of the mill concentration.

[0013] The application also provides an intelligent control system for a ball mill based on an intelligent control method for the ball mill, comprising: a collection module, a judgment module and a control module, wherein: The collection module is used for collecting real-time values of mill parameters in the running process of the ball mill, and setting the limits of the raw ore grade, the feed flow rate, the water flow rate, the operating power, the mill sound intensity and the mill concentration according to the attribute information of the raw ore; the mill parameters at least include: the feed flow rate, the water flow rate, the sand setting water flow rate, the operating power, the mill sound intensity and the concentrate grade; The judgment module is used for determining the working state of the ball mill based on the real-time values of the mill parameters in a preset time period, and the working state of the ball mill includes a normal state, a bulging state and an empty stomach state; The control module is used for determining a target control rule from the preset control rules according to the working state of the ball mill, and controlling the mill parameters of the ball mill according to the target control rule, and the preset control rules include a bulging control rule, an empty stomach control rule and a normal control rule.

[0014] Compared with the prior art, the application has the following advantages: The application provides an intelligent control method and system for a ball mill. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0016] Figure 1 FIG. 1 is a flowchart of the intelligent control method for the ball mill in the present application.

[0017] Figure 2 FIG. 3 is a flowchart of the method for controlling the ball mill according to the target control rule in the present application.

[0018] Figure 3 FIG. 4 is a flowchart of the method for calculating the target value of the water flow in the present application.

[0019] Figure 4 FIG. 5 is a structural diagram of the intelligent control system for the ball mill in the present application. DETAILED DESCRIPTION

[0020] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0021] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will combine the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and not intended to limit the present application and its applications or uses in any way. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0022] It should be noted that the terms used herein are only intended to describe specific embodiments and are not intended to limit exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and it should also be understood that when the terms "comprise" and / or "include" are used in the specification, there is a reference to the presence of a feature, step, operation, device, component, and / or combinations thereof.

[0023] Unless specifically stated otherwise, the relative arrangements of components and steps, numerical expressions, and numerical values set forth in the examples herein are not intended to limit the scope of the application. At the same time, it should be clear that the sizes of the various parts shown in the drawings are not drawn in proportion. Techniques, methods, and devices known to those of ordinary skill in the relevant art can not be discussed in detail, but should be considered as part of the specification where appropriate. In all examples shown and discussed herein, any specific value should be interpreted as merely exemplary, and not as a limitation. Therefore, other examples of exemplary embodiments can have different values. It should be noted that similar reference numbers and letters represent similar items in the following drawings, so further discussion of an item is not required in subsequent drawings once the item is defined in one drawing.

[0024] In addition, it should be noted that the use of the terms "first", "second", and the like to describe components is merely intended to facilitate the differentiation of the corresponding components, and the above terms have no special meaning unless otherwise stated. Therefore, it cannot be understood as a limitation on the scope of protection of the present application.

[0025] As shown in Figure 1 The present application provides an intelligent control method for a ball mill, characterized in that it comprises: Real-time values of grinding parameters in the running process of the ball mill are collected, and limit values of raw ore grade, ore supply flow, water supply flow, running power, grinding sound intensity, and grinding concentration are set according to the attribute information of the raw ore; the grinding parameters at least include ore supply flow, water supply flow, sand setting water flow, running power, grinding sound intensity, and concentrate grade.

[0026] The working state of the ball mill is determined based on the real-time values of the grinding parameters in a preset time period, and the working state of the ball mill includes a normal state, a belly-up state and an empty stomach state.

[0027] The target control rule is determined from the preset control rules according to the working state of the ball mill, and the grinding parameters of the ball mill are controlled according to the target control rule, and the preset control rules include a belly-up control rule, an empty stomach control rule and a normal control rule.

[0028] In specific implementation, as a preferred embodiment of the present application, the working state of the ball mill is determined based on the real-time values of the grinding parameters in a preset time period, including: In the preset time period, if the real-time value of the running power meets the first belly-up condition or the real-time value of the grinding sound intensity meets the second belly-up condition, the working state of the ball mill is determined as a belly-up state; if the real-time value of the running power meets the first empty stomach condition or the real-time value of the grinding sound intensity meets the second empty stomach condition, the working state of the ball mill is determined as an empty stomach state; otherwise, the working state of the ball mill is determined as a normal state.

[0029] In specific implementation, as a preferred embodiment of the present application, the limit value includes an upper limit value and a lower limit value, and the grinding parameters of the ball mill are controlled according to the target control rule, including: If the target control rule is a belly-up control rule, the grinding parameters of the ball mill are controlled at least including: controlling the feed flow to be adjusted to zero, and controlling the water flow to be adjusted to the upper limit value of the water flow; if the target control rule is an empty stomach control rule, the grinding parameters of the ball mill are controlled at least including: controlling the feed flow to be adjusted to the upper limit value of the feed flow, and controlling the water flow to be adjusted to the upper limit value of the water flow; if the target control rule is a normal control rule, the grinding parameters of the ball mill are controlled at least including: calculating the water flow target value according to the normal control rule, and controlling the water flow to be adjusted to the water flow target value.

[0030] In specific implementation, as a preferred embodiment of the present application, the water flow target value is calculated according to the normal control rule, including: The actual value of the grinding concentration is calculated based on the real-time values of the grinding parameters in a preset time period; the target value of the grinding concentration is calculated according to the normal control rule and the actual value of the grinding concentration; the water flow target value is calculated based on the target value of the grinding concentration.

[0031] In particular implementation, as the preferred embodiment of the present application, the normal control rule at least includes: the first control rule, the second control rule and the third control rule, the first control rule is to calculate the grinding concentration target value according to the limit value of the grinding concentration and the first coefficient, the second control rule is to calculate the grinding concentration target value according to the limit value of the grinding concentration and the second coefficient, and the third control rule is to calculate the grinding concentration target value according to the limit value of the grinding concentration and the third coefficient.

[0032] In particular implementation, as the preferred embodiment of the present application, the grinding concentration target value is calculated according to the normal control rule and the actual value of the grinding concentration, including: If the real-time value of the grinding parameter and the actual value of the grinding concentration in the preset time period meet the first coefficient condition, the grinding concentration target value is calculated according to the first control rule; if the real-time value of the grinding parameter and the actual value of the grinding concentration in the preset time period meet the second parameter condition, the grinding concentration target value is calculated according to the second control rule; and if the real-time value of the grinding parameter and the actual value of the grinding concentration in the preset time period meet the third parameter condition, the grinding concentration target value is calculated according to the third control rule.

[0033] In particular implementation, as the preferred embodiment of the present application, the first coefficient condition at least includes: the real-time value of the feed flow is less than or equal to the flow threshold value, the real-time value of the concentrate grade is greater than or equal to the grade threshold value, and the actual value of the grinding concentration is greater than the upper limit value of the grinding concentration; or, the real-time value of the feed flow is less than or equal to the flow threshold value, the real-time value of the concentrate grade is greater than or equal to the grade threshold value, and the real-time value of the grinding intensity is less than the lower limit value of the grinding intensity; or, the real-time value of the feed flow is less than or equal to the flow threshold value, the real-time value of the concentrate grade is greater than or equal to the grade threshold value, and the real-time value of the running power is less than the lower limit value of the running power; or, the real-time value of the feed flow is greater than the flow threshold value, and the actual value of the grinding concentration is greater than the upper limit value of the grinding concentration; or, the real-time value of the feed flow is greater than the flow threshold value, and the real-time value of the grinding intensity is less than the lower limit value of the grinding intensity; or, the real-time value of the feed flow is greater than the flow threshold value, and the real-time value of the running power is less than the lower limit value of the running power.

[0034] In particular implementation, as the preferred embodiment of the present application, the second coefficient condition at least includes: the real-time value of the feed flow is less than or equal to the flow threshold value, the real-time value of the concentrate grade is less than the grade threshold value, and the actual value of the grinding concentration is greater than or equal to the upper limit value of the grinding concentration; or, the real-time value of the feed flow is less than or equal to the flow threshold value, the real-time value of the concentrate grade is less than the grade threshold value, and the real-time value of the grinding intensity is less than or equal to the lower limit value of the grinding intensity; or, the real-time value of the feed flow is less than or equal to the flow threshold value, the real-time value of the concentrate grade is less than the grade threshold value, and the real-time value of the running power is less than or equal to the lower limit value of the running power; or, the real-time value of the feed flow is less than or equal to the flow threshold value, the real-time value of the concentrate grade is greater than or equal to the grade threshold value, the actual value of the grinding concentration is greater than or equal to the lower limit value of the grinding concentration, and the actual value of the grinding concentration is less than or equal to the upper limit value of the grinding concentration; or, the real-time value of the feed flow is less than or equal to the flow threshold value, the real-time value of the concentrate grade is greater than or equal to the grade threshold value, the real-time value of the grinding intensity is greater than or equal to the lower limit value of the grinding intensity, and the real-time value of the running power is greater than or equal to the lower limit value of the running power; or, the real-time value of the feed flow is greater than the flow threshold value, the actual value of the grinding concentration is greater than or equal to the lower limit value of the grinding concentration, and the actual value of the grinding concentration is less than or equal to the upper limit value of the grinding concentration; or, the real-time value of the feed flow is greater than the flow threshold value, the real-time value of the grinding intensity is greater than or equal to the lower limit value of the grinding intensity, and the real-time value of the running power is greater than or equal to the lower limit value of the running power.

[0035] In particular implementation, as the preferred embodiment of the present application, the third coefficient at least includes: the real-time value of the feed flow is less than or equal to the flow threshold value, the real-time value of the concentrate grade is less than the grade threshold value, and the actual value of the grinding concentration is less than the upper limit value of the grinding concentration; or, the real-time value of the feed flow is less than or equal to the flow threshold value, the real-time value of the concentrate grade is less than the grade threshold value, the real-time value of the grinding intensity is greater than the lower limit value of the grinding intensity, and the value of the running power is greater than the lower limit value of the running power; or, the real-time value of the feed flow is less than or equal to the flow threshold value, the real-time value of the concentrate grade is greater than or equal to the grade threshold value, and the actual value of the grinding concentration is less than the lower limit value of the grinding concentration; or, the real-time value of the feed flow is greater than the flow threshold value, and the actual value of the grinding concentration is less than the lower limit value of the grinding concentration.

[0036] The present application also provides an intelligent control system for a ball mill based on an intelligent control method for the ball mill, comprising: an acquisition module, a judgment module and a control module, wherein: The acquisition module is used for acquiring the real-time value of the grinding parameter in the running process of the ball mill, and setting the limit value of the raw ore grade, the feed flow, the water flow, the running power, the grinding intensity and the grinding concentration according to the attribute information of the raw ore; the grinding parameter at least includes: the feed flow, the water flow, the sand setting water flow, the running power, the grinding intensity and the concentrate grade; The judgment module is configured to determine the working state of the ball mill based on the real-time values of the grinding parameters in a preset time period, and the working state of the ball mill includes a normal state, a belly-up state and an empty stomach state. The control module is configured to determine a target control rule from preset control rules according to the working state of the ball mill, and control the grinding parameters of the ball mill according to the target control rule, and the preset control rules include a belly-up control rule, an empty stomach control rule and a normal control rule.

[0037] Embodiments The embodiment is an application of an intelligent control method for a ball mill in specific production.

[0038] In step S11, the real-time values of the grinding parameters in the running process of the ball mill are collected, and the limits of the ore grade, the feed flow, the water flow, the running power, the grinding sound intensity and the grinding concentration are set according to the attribute information of the raw ore.

[0039] Specifically, it can be understood that the ball mill grinds the raw ore (broken mineral) conveyed by the belt in the running process, and water, steel balls and the like are also added in the grinding process. The ground ore slurry flows into the pump pool, and then is pumped into the cyclone by the feed pump in the pump pool for classification to obtain coarse-grained sand and fine-grained ore slurry. The coarse-grained sand is discharged from the bottom of the cyclone and returned to the feed end of the ball mill through the pipeline, and the coarse-grained sand is mixed with the newly fed raw ore by the sand setting water and then ground again; and the fine-grained ore slurry directly enters the subsequent beneficiation operation. In the entire grinding process, multiple grinding parameters can be involved. When collecting each grinding parameter, all related parameters need to be collected, and in order to ensure that data can be collected in time, it can be collected once every second or once every certain period of time.

[0040] In some embodiments, the real-time values of the grinding parameters in the running process of the ball mill can be collected every 3 seconds as a fixed cycle. Before collecting the real-time values of the grinding parameters in the running process of the ball mill, an array can be configured for each parameter to store the real-time values of the grinding parameters, and the historical values and average values of the grinding parameters in different time periods can be further calculated. The grinding parameters at least include the feed flow, the water flow, the sand setting water flow, the make-up water flow, the number of added balls, the running power, the grinding sound intensity, the pump pool liquid level and the concentrate grade.

[0041] The ore supply flow rate refers to the weight of the raw ore entering the ball mill per unit of time, which is generally measured by an ore supply belt scale. The water supply flow rate refers to the amount of water added to the ball mill per unit of time, which is mainly used to adjust the concentration of the ore slurry, and is generally measured by a flow meter. The sand water flow rate refers to the flow rate of the water used to flush the coarse-grained sand and gravel discharged from the bottom of the cyclone, which is also generally measured by a flow meter. The running power refers to the power of the ball mill when it is running, which is used to reflect the real-time load state of the ball mill and is a key indicator for judging the working efficiency and faults of the ball mill, and is generally measured by a voltmeter, ammeter or power transducer. The grinding sound intensity refers to the strength of the sound produced when the ball mill is grinding, which is generally measured by a grinding sound spectrum analyzer (referred to as an electric ear). When the grinding sound is clear, it indicates that there is less material in the ball mill and the steel balls are empty, at which time the ore supply amount or the water amount may need to be increased. When the grinding sound is dull, it indicates that the ore slurry is too thick or the mineral filling rate is too high, which may cause the ball mill to swell, at which time the ore supply amount or the water amount needs to be reduced. Abnormal fluctuations in the grinding sound may be caused by loose lining plates and other factors that cause abnormal sound of the ball mill. The concentrate grade refers to the grade of the fine ore obtained after a series of complete mineral processing processes such as crushing, grinding, classification and dewatering. The concentrate grade can be directly measured by a grade meter.

[0042] In other embodiments, the ore grinding parameters further include: additional water flow rate, steel ball addition amount, pump pool liquid level, ore slurry concentration, overflow particle size of the cyclone, overflow concentration of the cyclone, etc. The additional water flow rate refers to the flow rate of the water that needs to be added to the pump pool due to insufficient ore slurry or excessively high ore slurry concentration, which is also generally measured by a flow meter. The steel ball addition amount refers to the number of steel balls added each time, which is used to assist in grinding the raw ore, and the weight of each steel ball is fixed. The steel ball addition amount can be automatically read by a ball adding machine. The pump pool liquid level refers to the liquid level of the ore slurry in the pump pool after the ore slurry discharged from the ball mill enters the pump pool, which is generally measured by a liquid level meter. The ore slurry concentration refers to the concentration of the ore slurry measured by a concentration meter after the ore slurry is discharged from the ball mill and enters the pump pool, but the measured ore slurry concentration cannot directly represent the ore slurry concentration during grinding in the ball mill. The measured ore slurry concentration is mainly used in the subsequent cyclone classification step. The overflow particle size of the cyclone refers to the particle size of the ore in the ore slurry discharged from the ball mill, which can be measured by a particle size analyzer. The overflow concentration of the cyclone refers to the concentration of the ore in the ore slurry discharged from the ball mill.

[0043] Specifically, it can also be understood that, due to natural fluctuations in ore properties in actual production, different batches of raw ore have significant differences in hardness, particle size, and useful mineral content, etc. Therefore, in order to more accurately control the grinding parameters, different limits are set for the relevant grinding parameters of the ball mill for each batch of raw ore, so as to ensure that each batch of raw ore can be efficiently ground, thereby ensuring that the ball mill accurately controls the ball mill to operate in the best efficiency state when grinding different raw ores. Therefore, in order to reduce the impact of fluctuations in ore properties on the grinding concentration, the limits of the raw ore grade, the feed flow, the water flow, the running power, the grinding sound intensity, and the grinding concentration are set according to the attribute information of the raw ore.

[0044] The attribute information of the raw ore includes the hardness, grade, particle size, and other properties of the ore. The hardness is used to reflect the grindability of the ore, and the higher the hardness value, the more difficult the grinding. The grade is used to reflect the content of iron in the ore, and the higher the content, the higher the grade value. High-grade ore may be associated with hard and brittle minerals (such as quartz), which requires higher grinding energy. The particle size is used to reflect the particle size distribution of the ore, and the higher the proportion of coarse particles, the stronger the grinding capacity required by the ore.

[0045] In some embodiments, before setting the limits of the raw ore grade, the feed flow, the water flow, the running power, the grinding sound intensity, and the grinding concentration according to the attribute information of the raw ore, the properties of each batch of raw ore need to be analyzed, for example, using a hardness tester to detect the hardness of the ore, using a particle size tester to detect the particle size or density of the ore, etc. Then, setting the limits of the raw ore grade, the feed flow, the water flow, the running power, the grinding sound intensity, and the grinding concentration according to the attribute information of the raw ore can be to determine the upper and lower limits of the raw ore grade, the feed flow, the water flow, the running power, the grinding sound intensity, and the grinding concentration according to the hardness, grade, particle size, and density of the ore. When the hardness increases, the lower limit of the feed flow needs to be reduced, and the upper limit of the running power needs to be increased. When the proportion of coarse particles in the particle size increases, the lower limit of the feed flow needs to be reduced, the lower limit of the water flow needs to be increased, the upper limit of the running power needs to be increased, and the upper limit of the grinding sound intensity needs to be increased. When the proportion of fine particles in the particle size increases, the upper limit of the water flow needs to be increased, and the lower limit of the grinding concentration needs to be reduced. When the density increases, the upper limit of the grinding concentration needs to be reduced, and the lower limit of the water flow needs to be increased. When the density decreases, the upper limit of the feed flow needs to be increased, and the upper limit of the grinding concentration needs to be increased. When the raw ore grade contains hard minerals such as quartz, the upper limit of the grinding sound intensity needs to be increased.

[0046] Specifically, the limit value of the raw ore grade is set according to the selectability of the ore and the requirements of the beneficiation process, the upper limit value is determined by the type of the ore deposit and the mining scheme, and generally does not exceed the maximum value of the economically recoverable grade, and when the raw ore grade contains hard minerals such as quartz, the upper limit value of the grinding intensity needs to be increased, but it needs to avoid the situation that the grade is too high to cause the overload of the grinding system or the imbalance of the subsequent separation operation; the lower limit value is set according to the economic benefits of the concentrator and the resource utilization rate, and generally does not fall below the minimum industrial grade (for example, the iron ore is generally ≥20%).

[0047] The limit value of the feed flow rate is set according to the processing capacity of the ball mill and the classification sand return of the cyclone, for example, the initial upper limit value = the maximum processing capacity of the ball mill × 90%, and the initial lower limit value = the minimum flow rate to prevent blockage, and on the basis of the initial upper limit value and the initial lower limit value, the upper limit value and the lower limit value are adjusted according to the hardness, particle size and density of the ore, for example, for the ore with a hardness greater than 12, the upper limit value = the initial upper limit value × (1-0.05×(hardness-10)), and the lower limit value = the initial lower limit value + 5%; for the ore with a hardness less than 8, the upper limit value = the initial upper limit value × 1.1, and the lower limit value = the initial lower limit value - 5%. For another example, when the proportion of coarse particles is high, the upper limit value = the initial upper limit value × 0.9, when the density > 3.2 t / m3, the lower limit value = the initial lower limit value + 5%. In addition, the upper and lower limit values of the feed flow rate can be further adjusted according to the classification sand return of the cyclone, and when the sand return ratio > 250%, the upper limit value of the feed flow rate is reduced by 5%-8%, and when the sand return ratio < 150%, the lower limit value of the feed flow rate is increased.

[0048] The limit value of the water flow rate is set according to the hardness of the ore and the actual production demand, the upper limit value should ensure that the pulp concentration is within a reasonable range, and the lower limit value should ensure the fluidity of the pulp.

[0049] The upper limit value of the running power should be set according to the maximum power of the equipment and the actual production demand, and the lower limit value should ensure the efficiency of the grinding process and the product quality, so as to ensure the highest grinding efficiency.

[0050] The upper limit value of the grinding intensity can be the standard grinding intensity recorded in the operation of the ore under the best working condition, and the lower limit value can be the background noise measured when there is no feed, for example, the upper limit value = 0.9 × the standard grinding intensity - 5 × (1-ore density / 3), and the lower limit value = 1.1 × the standard grinding intensity + 0.3 × the hardness of the ore.

[0051] The upper limit value of the limit value of the grinding concentration should ensure the fluidity of the pulp, and the lower limit value should ensure the grinding efficiency, and the limit value of the grinding concentration is generally between 44%-83%, and the specific value can be determined according to the properties of the ore and the production practice. For example, for the ore with high hardness or high specific gravity, the grinding concentration should be controlled between 75%-85%; and for the ore with low hardness or low specific gravity, the grinding concentration should be controlled between 65%-75%.

[0052] In some embodiments, the attribute information of the raw ore includes parameter information of actual grinding of the raw ore, and the setting of the upper limit and the lower limit of the raw ore grade, the feed flow, the water flow, the running power, the mill sound intensity, and the grinding concentration according to the attribute information of the raw ore can be based on the parameter information of actual grinding of each batch of raw ore, for example, the control amount of the grinding concentration of the ball mill is determined according to the pulp concentration obtained by actual grinding to ensure that the grinding concentration is within the optimal range.

[0053] It should be noted that the upper limit or the lower limit of the limit value during the grinding process of each batch of raw ore can be a fixed value or a dynamically adjusted value, for example, the trend of the mill sound intensity or the running power is checked every 15 minutes to adjust the limit value of the above-mentioned parameters.

[0054] In the above method, the limit value of the grinding parameter is set according to the attribute information of the raw ore to stabilize the fluctuation range of the grinding concentration, significantly reduce the influence of ore property fluctuation on the grinding classification circuit, and improve the stability of the beneficiation index.

[0055] Step S12, determining the working state of the ball mill based on the real-time value of the grinding parameter within the preset time period, the working state of the ball mill including the normal state, the bulging state and the empty state.

[0056] Specifically, it can be understood that the working state of the ball mill is determined according to the collected real-time value of the grinding parameter, and the preset time period can be 5 minutes or 10 minutes, which is not limited in the present disclosure, and further, the real-time value of the grinding parameter within the preset time period is generally the average value of the grinding parameter, that is, the real-time value of the grinding parameter can be the average value of all real-time values of any grinding parameter within the preset time period; in addition, the real-time value of the grinding parameter can also be the maximum value of all real-time values, or the minimum value of all real-time values, which is not specially limited in the present disclosure.

[0057] In the method, the determination of the working state of the ball mill based on the real-time value of the grinding parameter within the preset time period includes: within the preset time period, if the real-time value of the running power meets the first bulging condition or the real-time value of the mill sound intensity meets the second bulging condition, the working state of the ball mill is determined as the bulging state; if the real-time value of the running power meets the first empty condition or the real-time value of the mill sound intensity meets the second empty condition, the working state of the ball mill is determined as the empty state; otherwise, the working state of the ball mill is determined as the normal state.

[0058] In some embodiments, the first bulging condition can be that the average of the running power in a preset time period is less than or equal to a bulging power value, or any real-time value of the running power in the preset time period is less than or equal to the bulging power value; the second bulging condition can be that the average of the grinding sound intensity in a preset time period is less than or equal to a bulging grinding sound intensity value, or any real-time value of the grinding sound intensity in the preset time period is less than or equal to the bulging grinding sound intensity value; the first empty condition can be that the average of the running power in a preset time period is less than or equal to an empty power value, or any real-time value of the running power in the preset time period is less than or equal to the empty power value; and the second empty condition can be that the average of the grinding sound intensity in a preset time period is less than or equal to an empty grinding sound intensity value, or any real-time value of the grinding sound intensity in the preset time period is less than or equal to the empty grinding sound intensity value.

[0059] In the above embodiments, the bulging power value, the empty power value, the bulging grinding sound intensity value and the empty grinding sound intensity value are all preset fixed values, and the bulging power value is less than the lower limit value of the running power, generally taking 0.8 times of the lower limit value of the running power as the bulging power value; the empty power value is greater than the upper limit value of the running power, generally taking 1.12 times of the upper limit value of the running power as the empty power value; the bulging grinding sound intensity value is less than the lower limit value of the grinding sound intensity, generally taking a grinding sound intensity 5 dB lower than the lower limit value of the grinding sound intensity as the bulging grinding sound intensity value; and the empty grinding sound intensity value is greater than the upper limit value of the grinding sound intensity, generally taking a grinding sound intensity 5 dB higher than the upper limit value of the grinding sound intensity as the empty grinding sound intensity value.

[0060] In the above method, based on the preset bulging power value, the empty power value, the bulging grinding sound intensity value and the empty grinding sound intensity value, and the real-time value of the grinding parameters collected, the real-time working state of the ball mill is determined to be a bulging state, an empty state or a normal state, the special states such as bulging and empty are quickly distinguished, the control rules meeting the actual needs are set according to different working states, and thus the precise control of the ball mill is realized.

[0061] In step S13, a target control rule is determined from preset control rules according to the working state of the ball mill, and the grinding parameters of the ball mill are controlled according to the target control rule, and the preset control rules include a bulging control rule, an empty control rule and a normal control rule.

[0062] Specifically, it can be understood that the working state of the ball mill determined according to step S12 is divided into a belly-up state, an empty stomach state or a normal state, different control rules are selected for the ball mill in different states, the ball mill in the belly-up state needs to select a belly-up control rule for control adjustment, the ball mill in the empty stomach state needs to select an empty stomach control rule for control adjustment, and the ball mill in the normal state needs to select a normal control rule for control adjustment.

[0063] Specifically, it can also be understood that different control rules need to be controlled and adjusted to different degrees for the grinding parameters, such as the belly-up control rule is used to change the working state of the ball mill from the belly-up state to the normal state, which needs to stop feeding the ball mill, that is, needs to reduce the ore flow and increase the water flow; and the empty stomach control rule is used to change the working state of the ball mill from the empty stomach state to the normal state, which needs to supplement the ball mill, that is, needs to increase the ore flow and increase the water flow.

[0064] In the above method, by collecting the real-time value of the grinding parameters of the ball mill, and setting the upper limit value and the lower limit value for the grinding parameters according to the attribute information of the raw ore, not only the grinding product size distribution can be improved, the subsequent hydrocyclone classification effect can be stabilized, but also the influence of the fluctuation of the ore properties on the grinding concentration can be reduced, the grinding classification circuit can run more smoothly; by distinguishing the working state of the ball mill by comprehensively considering multiple grinding parameters, the special working state can be controlled and adjusted in time, the steel consumption and the lining plate consumption are effectively reduced, and the service life of the ball mill equipment is prolonged; by using different control rules for the ball mill in different states, the precise control of the grinding concentration of the ball mill is realized, the invalid impact in the grinding process can be reduced, the impact and grinding effect of the steel balls can reach the best balance, and thus the grinding efficiency of the ball mill is improved.

[0065] Figure 2 is a flowchart of a method for controlling a ball mill according to the target control rule provided by the present disclosure; see Figure 2 The center coordinates of each steel coil are calculated based on each shadow area of each steel coil in the fusion image, which includes: Step S21, if the target control rule is a belly-up control rule, the grinding parameters of the ball mill are controlled at least including: controlling the ore flow adjustment to be zero, and controlling the water flow adjustment to be the upper limit value of the water flow.

[0066] Specifically, after determining that the working state of the ball mill is in the belly-up state based on the real-time values of the grinding parameters within a preset time period, in order to quickly control the pulp concentration in the ball mill to reach a stable state, it is necessary to immediately control the ore feeding belt to stop feeding, that is, to adjust the ore feeding flow to zero; at the same time, it is also necessary to add water to the ball mill, that is, to adjust the water feeding flow to an upper limit value of the water feeding flow. Then, the real-time values of the grinding parameters are continuously collected, and it is determined whether the working state of the ball mill within a preset time returns to the normal state. If the belly-up state is maintained, the ore feeding flow is continuously controlled to be adjusted to zero, and the water feeding flow is continuously controlled to be adjusted to the upper limit value of the water feeding flow. If the working state of the ball mill changes to the normal state, step S23 is executed.

[0067] In step S22, if the target control rule is the empty control rule, the grinding parameters of the ball mill are controlled at least including: controlling the ore feeding flow to be adjusted to an upper limit value of the ore feeding flow, and controlling the water feeding flow to be adjusted to an upper limit value of the water feeding flow.

[0068] Specifically, after determining that the working state of the ball mill is in the empty state based on the real-time values of the grinding parameters within a preset time period, in order to quickly supplement the ball mill with material until the ball mill runs in the normal state, it is necessary to immediately control the ore feeding belt to feed ore at the maximum ore feeding flow, that is, to adjust the ore feeding flow to the upper limit value of the ore feeding flow; at the same time, it is also necessary to add water to the ball mill, that is, to adjust the water feeding flow to the upper limit value of the water feeding flow. Then, the real-time values of the grinding parameters are continuously collected, and it is determined whether the working state of the ball mill within a preset time returns to the normal state. If the empty state is maintained, the ore feeding flow is continuously controlled to be adjusted to the upper limit value of the ore feeding flow, and the water feeding flow is continuously controlled to be adjusted to the upper limit value of the water feeding flow. If the working state of the ball mill changes to the normal state, step S23 is executed.

[0069] In step S23, if the target control rule is the normal control rule, the grinding parameters of the ball mill are controlled at least including: calculating a water feeding flow target value according to the normal control rule, and controlling the water feeding flow to be adjusted to the water feeding flow target value.

[0070] Specifically, after determining that the working state of the ball mill is in the normal state based on the real-time values of the grinding parameters within a preset time period, in order to more accurately control the grinding concentration of the ball mill, the normal state is subdivided, and at least three control rules are set to control the grinding concentration.

[0071] In some embodiments, step 23 can be to first calculate the pulp concentration of the pulp discharged by the ball mill, and then comprehensively judge the subdivision of various different normal states in combination with the real-time values of the collected grinding parameters, calculate the recommended control value of the grinding concentration, i.e., the grinding concentration target value, according to the normal control rules corresponding to each normal state, and then calculate the water flow target value according to the grinding concentration target value, so as to realize the control of the grinding concentration. Figure 3 is a flowchart of a method for calculating a water flow target value provided by the present disclosure; see Figure 3 , and the method comprises the following steps: Step S31, calculating a grinding concentration actual value based on the real-time values of the grinding parameters within a preset time period.

[0072] Specifically, the average values of the ore feeding flow, the sand setting water flow and the water flow are calculated based on the real-time values of the grinding parameters within a preset time period, and the grinding concentration actual value is calculated according to a first formula, i.e., grinding concentration actual value = ore feeding flow * α / (ore feeding flow + sand setting water flow + water flow), wherein α is determined according to the moisture content of the raw ore, and α is different when the moisture contents of different batches of raw ore are different, for example, if the moisture content of the raw ore is 2%, α takes a value of 98. The ore feeding flow, the sand setting water flow and the water flow are average values calculated according to the real-time values collected within the preset time period.

[0073] Step S32, calculating a grinding concentration target value according to the normal control rules and the grinding concentration actual value.

[0074] Specifically, the normal control rules at least include: a first control rule, a second control rule and a third control rule, the first control rule is to calculate the grinding concentration target value according to the limit value of the grinding concentration and a first coefficient, the second control rule is to calculate the grinding concentration target value according to the limit value of the grinding concentration and a second coefficient, and the third control rule is to calculate the grinding concentration target value according to the limit value of the grinding concentration and a third coefficient. Wherein the first coefficient is less than the second coefficient, and the second coefficient is less than the third coefficient. Generally, the first coefficient is set to 0.25, the second coefficient is set to 0.5, and the third coefficient is set to 0.75.

[0075] More specifically, the calculation of the grinding concentration target value according to the normal control rules and the grinding concentration actual value comprises: Step S321, if the real-time values of the grinding parameters and the grinding concentration actual value within the preset time period meet the first parameter condition, the grinding concentration target value is calculated according to the first control rule.

[0076] Step S322, if the real-time value of the grinding parameter and the actual value of the grinding concentration in the preset time period satisfy the second parameter condition, a target value of the grinding concentration is calculated according to the second control rule.

[0077] Step S323, if the real-time value of the grinding parameter and the actual value of the grinding concentration in the preset time period satisfy the third parameter condition, a target value of the grinding concentration is calculated according to the third control rule.

[0078] In the above steps S321-S323, the flow threshold value and the grade threshold value are fixed values set for the same batch of raw ore, the flow threshold value is generally set to 248 Kg / min, and the grade threshold value is generally set to 65%, and in other embodiments, the flow threshold value and the grade threshold value can also be adjusted according to actual conditions, which is not limited by the present disclosure.

[0079] Step S33, a target value of the water supply flow is calculated based on the target value of the grinding concentration.

[0080] Specifically, after the target value of the grinding concentration is calculated, a target value of the water supply flow is calculated according to a second formula, the second formula is: target value of the water supply flow = ((ore supply flow ) / target value of the grinding concentration)-ore supply flow-sand water flow, wherein, is determined according to the water content of the raw ore, and the water content of different batches of raw ore is different , for example, if the water content of the raw ore is 2%, then is 98. The ore supply flow, the sand water flow and the water supply flow are average values calculated according to the real-time values collected in the preset time period.

[0081] In the above method, different control rules are set for different working states, and at least three normal control rules are further set for the normal state, which not only can control the special working states of the bulging and the empty stomach in time, but also can select the appropriate normal control rule to calculate the recommended control value of the grinding concentration of the ball mill and further calculate the recommended control value of the water supply flow through the comprehensive analysis and judgment of multiple grinding parameters in the normal working state, thereby realizing the accurate control of the grinding concentration of the ball mill, making the grinding concentration of the ball mill in a stable state, and improving the hourly rate of the ball mill.

[0082] Figure 4 is a structural schematic diagram of an intelligent control system for a ball mill provided by the present disclosure. Referring to Fig. Figure 4 , the device 400 comprises: The collection module 410 is configured to collect real-time values of the grinding parameters in the operation process of the ball mill, and set the limits of the raw ore grade, the feed flow, the water flow, the operation power, the grinding sound intensity and the grinding concentration according to the attribute information of the raw ore; wherein the grinding parameters at least include the feed flow, the water flow, the sand setting water flow, the operation power, the grinding sound intensity and the concentrate grade; The judgment module 420 is configured to determine the working state of the ball mill based on the real-time values of the grinding parameters in a preset time period, and the working state of the ball mill includes a normal state, a bulging state and an empty stomach state. The control module 430 is configured to determine a target control rule from preset control rules according to the working state of the ball mill, and control the grinding parameters of the ball mill according to the target control rule, wherein the preset control rules include a bulging control rule, an empty stomach control rule and a normal control rule.

[0083] The above detailed description of the intelligent control system for the ball mill is described in the above embodiments, and the repeated parts will not be described. The above described embodiments of the steel coil positioning method based on the plate car and the steel coil positioning device based on the plate car are only illustrative, wherein the "unit" and "module" used as separate components can be a combination of software and / or hardware that realizes the predetermined function, and can or can not be physically separated. Part or all of the modules can be selected to achieve the purpose of the embodiments according to the actual needs. Those skilled in the art can understand and implement without creative labor.

[0084] Finally, it should be noted that: the above embodiments are used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the above embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for intelligent control of a ball mill, characterized in that, The application relates to a ball mill control method and device. The method comprises the following steps: Collecting real-time values of grinding parameters during ball mill operation, and setting the ore grade, feed flow, water flow, running power, grinding sound intensity and grinding concentration limit value according to the properties of the raw ore; The grinding parameters at least include the feed flow, water flow, sand setting water flow, running power, grinding sound intensity and concentrate grade; Determining the working state of the ball mill based on the real-time values of the grinding parameters within a preset time period, wherein the working state of the ball mill includes a normal state, a bulging state and an empty stomach state; 2. The intelligent control method for a ball mill as claimed in claim 1 wherein, Determining the target control rule from the preset control rule according to the working state of the ball mill, and controlling the grinding parameters of the ball mill according to the target control rule, wherein the preset control rule includes a bulging control rule, an empty stomach control rule and a normal control rule. The method comprises the following steps:

3. The intelligent control method for a ball mill as claimed in claim 1 wherein, Within the preset time period, if the real-time value of the running power meets the first bulging condition or the real-time value of the grinding sound intensity meets the second bulging condition, the working state of the ball mill is determined as the bulging state; if the real-time value of the running power meets the first empty stomach condition or the real-time value of the grinding sound intensity meets the second empty stomach condition, the working state of the ball mill is determined as the empty stomach state; otherwise, the working state of the ball mill is determined as the normal state. The limit value includes an upper limit value and a lower limit value, and the method for controlling the grinding parameters of the ball mill according to the target control rule comprises the following steps: If the target control rule is the bulging control rule, the method for controlling the grinding parameters of the ball mill at least includes controlling the feed flow to be adjusted to zero and controlling the water flow to be adjusted to the upper limit value of the water flow; If the target control rule is the empty stomach control rule, the method for controlling the grinding parameters of the ball mill at least includes controlling the feed flow to be adjusted to the upper limit value of the feed flow and controlling the water flow to be adjusted to the upper limit value of the water flow; 4. The intelligent control method for a ball mill as claimed in claim 3, wherein, If the target control rule is the normal control rule, the method for controlling the grinding parameters of the ball mill at least includes calculating the water flow target value according to the normal control rule and controlling the water flow to be adjusted to the water flow target value. The method comprises the following steps: Calculating the actual grinding concentration value based on the real-time values of the grinding parameters within the preset time period; Calculating the target grinding concentration value according to the normal control rule and the actual grinding concentration value; 5. The intelligent control method for a ball mill as claimed in claim 3, wherein, Calculating the water flow target value based on the target grinding concentration value.

6. The intelligent control method for a ball mill as claimed in claim 4, wherein, The normal control rule at least includes a first control rule, a second control rule and a third control rule, wherein the first control rule is used for calculating the target grinding concentration value according to the limit value of the grinding concentration and a first coefficient, the second control rule is used for calculating the target grinding concentration value according to the limit value of the grinding concentration and a second coefficient, and the third control rule is used for calculating the target grinding concentration value according to the limit value of the grinding concentration and a third coefficient. The method comprises the following steps: Calculating the target grinding concentration value according to the normal control rule and the actual grinding concentration value. If the real-time value of the grinding parameter and the actual value of the grinding concentration in the preset time period satisfy a first coefficient condition, a grinding concentration target value is calculated according to the first control rule; If the real-time value of the grinding parameter and the actual value of the grinding concentration in the preset time period satisfy a second parameter condition, a grinding concentration target value is calculated according to the second control rule; If the real-time value of the grinding parameter and the actual value of the grinding concentration in the preset time period satisfy a third parameter condition, a grinding concentration target value is calculated according to the third control rule.

7. The intelligent control method for a ball mill as claimed in claim 1 wherein, The first coefficient condition at least includes: The real-time value of the feed flow is less than or equal to the flow threshold value, the real-time value of the concentrate grade is greater than or equal to the grade threshold value, and the actual value of the grinding concentration is greater than the upper limit value of the grinding concentration; or, the real-time value of the feed flow is less than or equal to the flow threshold value, the real-time value of the concentrate grade is greater than or equal to the grade threshold value, and the real-time value of the grinding intensity is less than the lower limit value of the grinding intensity; or, the real-time value of the feed flow is less than or equal to the flow threshold value, the real-time value of the concentrate grade is greater than or equal to the grade threshold value, and the real-time value of the running power is less than the lower limit value of the running power; or, the real-time value of the feed flow is greater than the flow threshold value, and the actual value of the grinding concentration is greater than the upper limit value of the grinding concentration; or, the real-time value of the feed flow is greater than the flow threshold value, and the real-time value of the grinding intensity is less than the lower limit value of the grinding intensity; or, the real-time value of the feed flow is greater than the flow threshold value, and the real-time value of the running power is less than the lower limit value of the running power.

8. The intelligent control method for a ball mill as claimed in claim 1 wherein, The second coefficient condition at least includes: The real-time value of the feed flow is less than or equal to the flow threshold value, the real-time value of the concentrate grade is less than the grade threshold value, and the actual value of the grinding concentration is greater than or equal to the upper limit value of the grinding concentration; or, The real-time value of the feed flow is less than or equal to the flow threshold value, the real-time value of the concentrate grade is less than the grade threshold value, and the real-time value of the grinding intensity is less than or equal to the lower limit value of the grinding intensity; or, The real-time value of the feed flow is less than or equal to the flow threshold value, the real-time value of the concentrate grade is less than the grade threshold value, and the real-time value of the running power is less than or equal to the lower limit value of the running power; or, The real-time value of the feed flow is less than or equal to the flow threshold value, the real-time value of the concentrate grade is greater than or equal to the grade threshold value, and the actual value of the grinding concentration is greater than or equal to the lower limit value of the grinding concentration and less than or equal to the upper limit value of the grinding concentration; or, The real-time value of the feed flow is less than or equal to the flow threshold value, the real-time value of the concentrate grade is greater than or equal to the grade threshold value, and the real-time value of the grinding intensity is greater than or equal to the lower limit value of the grinding intensity and the real-time value of the running power is greater than or equal to the lower limit value of the running power; or, The real-time value of the feed flow is greater than the flow threshold value, and the actual value of the grinding concentration is greater than or equal to the lower limit value of the grinding concentration and less than or equal to the upper limit value of the grinding concentration; or, The real-time value of the feed flow is greater than the flow threshold value, and the real-time value of the grinding intensity is greater than or equal to the lower limit value of the grinding intensity and the real-time value of the running power is greater than or equal to the lower limit value of the running power.

9. The intelligent control method for a ball mill as claimed in claim 1 wherein, The third coefficient at least includes: The real-time value of the feed flow rate is less than or equal to the flow rate threshold, the real-time value of the concentrate grade is less than the grade threshold, and the actual value of the grinding concentration is less than the upper limit value of the grinding concentration; or, the real-time value of the feed flow rate is less than or equal to the flow rate threshold, the real-time value of the concentrate grade is less than the grade threshold, the real-time value of the grinding intensity is greater than the lower limit value of the grinding intensity, and the operating power value is greater than the lower limit value of the operating power; or, the real-time value of the feed flow rate is less than or equal to the flow rate threshold, the real-time value of the concentrate grade is greater than or equal to the grade threshold, and the actual value of the grinding concentration is less than the lower limit value of the grinding concentration; or, the real-time value of the feed flow rate is greater than the flow rate threshold, and the actual value of the grinding concentration is less than the lower limit value of the grinding concentration.

10. An intelligent control system for a ball mill based on the implementation of the intelligent control method for a ball mill as claimed in any one of claims 1 to 9, characterized by, Comprise: The acquisition module, the judgment module and the control module, wherein: The acquisition module is used for acquiring real-time values of grinding parameters in the running process of the ball mill, and setting the limits of the ore grade, the feed flow rate, the water flow rate, the operating power, the grinding intensity and the grinding concentration according to the attribute information of the raw ore; the grinding parameters at least include the feed flow rate, the water flow rate, the sand setting water flow rate, the operating power, the grinding intensity and the concentrate grade; The judgment module is used for determining the working state of the ball mill based on the real-time values of the grinding parameters in a preset time period, and the working state of the ball mill includes the normal state, the bulging state and the empty stomach state; The control module is used for determining a target control rule from preset control rules according to the working state of the ball mill, and controlling the grinding parameters of the ball mill according to the target control rule, and the preset control rules include the bulging control rule, the empty stomach control rule and the normal control rule.

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