A rod mill control method, device, equipment and medium

Abstract

The application discloses a rod mill control method, device, equipment and medium, and the method comprises the following steps: determining the actual running current value of the rod mill in a preset time period according to the actual running condition of the rod mill; determining the actual filling rate of the grinding body in the rod mill according to the preset correlation between the running current value and the filling rate and the actual running current value; in the case that the actual filling rate is less than the preset standard filling rate, determining the target supplement quantity of the grinding body according to the preset filling relationship between the filling rate, the grinding body and the rod mill, and the actual filling rate and the preset standard filling rate, and adding the grinding body matched with the target supplement quantity into the rod mill. It can be seen that the actual filling rate of the grinding body is determined through the actual running current value of the rod mill, which not only effectively reduces the production capacity loss caused by the traditional manual sampling shutdown, but also accurately determines the supplement quantity of the rod, thereby significantly reducing the production cost caused by the redundant steel rod.

Description

Technical Field

[0001] This invention relates to the field of mineral processing technology, and in particular to a control method, device, equipment and medium for a rod mill. Background Technology

[0002] A rod mill is an industrial device used for crushing materials. It grinds materials to the target particle size by impacting them with grinding media. Therefore, the operating condition of the grinding media has a direct impact on production costs and efficiency.

[0003] In existing technologies, it is usually necessary to periodically stop the rod mill to observe the operating status of the grinding media and replenish the amount of grinding media based on experience. However, this can easily lead to an imbalance in the amount of grinding media filled, which cannot guarantee production efficiency. Therefore, how to accurately replenish the amount of grinding media is a technical problem that urgently needs to be solved. Summary of the Invention

[0004] This application provides a rod mill control method, device, equipment, and medium, which solves the technical problem of uneven grinding media filling in the prior art, which makes it impossible to guarantee production efficiency, and achieves the technical effect of accurately replenishing the number of grinding media.

[0005] In a first aspect, this application provides a rod mill control method, the method comprising: Based on the actual operating conditions of the rod mill, determine the actual operating current value of the rod mill within the preset time period; The actual filling rate of the grinding media in the rod mill is determined based on the preset correlation between the operating current value and the filling rate, as well as the actual operating current value. If the actual filling rate is less than the preset standard filling rate, the target replenishment quantity of grinding media is determined based on the filling rate, the preset filling relationship between the grinding media and the rod mill, as well as the actual filling rate and the preset standard filling rate, and grinding media matching the target replenishment quantity are added to the rod mill.

[0006] In some embodiments of this application, based on the foregoing scheme, the actual operating current value of the rod mill within a preset time period is determined according to the actual operating conditions of the rod mill, including: Based on the actual operating conditions of the rod mill, obtain the unit current value of the rod mill for each unit time within a preset time period; All unit current values ​​are preprocessed to determine the actual operating current value.

[0007] In some embodiments of this application, based on the foregoing scheme, the method for determining the preset association relationship includes: Within each of the multiple sample time periods, the sample operating current value of the rod mill, the sample distance between the upper surface of the grinding media and the center of the rod mill, and the inner diameter of the rod mill cylinder are obtained. Within each sample time period, the sample filling rate of the grinding media is determined based on the sample distance and the inner diameter of the cylinder. A preset correlation is determined based on the fill rate of all samples and the sample running current value corresponding to each fill rate.

[0008] In some embodiments of this application, based on the foregoing scheme, the method for determining the preset standard fill rate includes: Under the condition that the upper surface of the grinding media and the feed port of the rod mill meet the standard conditions, obtain the standard distance between the upper surface of the grinding media and the center of the rod mill, and obtain the inner diameter of the rod mill cylinder; Determine the preset standard filling rate based on the standard distance and the inner diameter of the cylinder.

[0009] In some embodiments of this application, based on the foregoing scheme, the method further includes: Obtain the unit current value of the rod mill in each unit of time within a preset time period; Select the maximum and minimum unit current values ​​from multiple unit current values; The actual current fluctuation value for a preset time period is determined based on the maximum and minimum unit current values. If the actual current fluctuation value exceeds the preset current fluctuation value, the rod mill is identified as malfunctioning, and the rod mill is shut down and the grinding media in the rod mill are removed.

[0010] In some embodiments of this application, based on the foregoing scheme, the method for determining the preset current fluctuation value includes: Based on the actual operating current value and the preset fluctuation coefficient, determine the preset current fluctuation value corresponding to the preset time period.

[0011] In some embodiments of this application, determining the target replenishment quantity of grinding media based on the foregoing scheme includes: When the actual filling rate is less than the preset standard filling rate, the quantity to be added is determined based on the filling rate, the preset filling relationship between the grinding media and the rod mill, and the actual filling rate and the preset standard filling rate. If the quantity to be verified is an integer, the quantity to be verified is determined as the target quantity. If the quantity to be verified is not an integer, select the target rounding strategy from multiple rounding strategies, and use the target rounding strategy to correct the quantity to be verified. Then, determine the corrected quantity to be verified as the target quantity.

[0012] Secondly, this application provides a rod mill control device, the device comprising: The actual operating current value determination module is used to determine the actual operating current value of the rod mill within a preset time period based on the actual operating conditions of the rod mill. The actual filling rate determination module is used to determine the actual filling rate of the grinding media based on the preset correlation between the operating current value and the filling rate, as well as the actual operating current value. The supplementary control module is used to determine the target supplementary quantity of grinding media based on the filling rate, the preset filling relationship between the grinding media and the rod mill, and the actual filling rate and the preset standard filling rate when the actual filling rate is less than the preset standard filling rate, and to add grinding media matching the target supplementary quantity to the rod mill.

[0013] Thirdly, this application provides an electronic device, comprising: processor; Memory used to store processor-executable instructions; The processor is configured to execute a rod mill control method as provided in the first aspect.

[0014] Fourthly, this application provides a non-transitory computer-readable storage medium that, when the instructions in the storage medium are executed by the processor of an electronic device, enables the electronic device to perform a rod mill control method as provided in the first aspect.

[0015] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages: This application provides a rod mill control method, comprising: determining the actual operating current value of the rod mill within a preset time period based on the actual operating conditions of the rod mill; determining the actual filling rate of the grinding media in the rod mill based on a preset correlation between the operating current value and the filling rate, and the actual operating current value; and, if the actual filling rate is less than a preset standard filling rate, determining the target replenishment quantity of the grinding media based on the filling rate, the preset filling relationship between the grinding media and the rod mill, and the actual filling rate and the preset standard filling rate, and adding grinding media matching the target replenishment quantity to the rod mill. It is evident that determining the actual filling rate of the grinding media by using the actual operating current value of the rod mill effectively reduces the production capacity loss caused by traditional manual sampling shutdowns. Simultaneously, it can accurately determine the replenishment quantity, significantly reducing production costs caused by redundant steel bars. This not only improves the operating efficiency and economy of the rod mill but also achieves synergistic optimization of resource utilization and equipment reliability, showing broad application prospects in the intelligent upgrading of heavy industries such as mining and building materials. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A side view of a rod mill provided in an embodiment of this application; Figure 2 A front structural schematic diagram of a rod mill provided in an embodiment of this application; Figure 3 A schematic flowchart of a rod mill control method provided in an embodiment of this application; Figure 4 A simplified cross-sectional view of a rod mill when it is stationary, provided in an embodiment of this application; Figure 5 This is a schematic diagram of the structure of a rod mill control device provided in an embodiment of this application; Figure 6 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application; In the above diagram: 1. Cylinder body; 101. First feed inlet; 102. Second feed inlet; 103. Discharge outlet. Detailed Implementation

[0018] This application provides a rod mill control method that solves the technical problem in the prior art where the grinding media filling amount is unbalanced and production efficiency cannot be guaranteed.

[0019] The technical solution of this application embodiment is to solve the above-mentioned technical problems, and the general idea is as follows: This application provides a rod mill control method, including: determining the actual operating current value of the rod mill within a preset time period based on the actual operating conditions of the rod mill; determining the actual filling rate of the grinding media in the rod mill based on a preset correlation between the operating current value and the filling rate and the actual operating current value; and, if the actual filling rate is less than a preset standard filling rate, determining the target replenishment quantity of the grinding media based on the filling rate, the preset filling relationship between the grinding media and the rod mill, and the actual filling rate and the preset standard filling rate, and adding grinding media matching the target replenishment quantity to the rod mill.

[0020] It is evident that determining the actual filling rate of the grinding media by using the actual operating current value of the rod mill effectively reduces the production capacity loss caused by traditional manual sampling and shutdown. At the same time, it can accurately determine the number of replacement rods, significantly reducing the production costs caused by redundant steel rods. This not only improves the operating efficiency and economy of the rod mill, but also achieves synergistic optimization of resource utilization and equipment reliability. It has broad application prospects in the intelligent upgrading of heavy industries such as mining and building materials.

[0021] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0022] First, it should be clarified that the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0023] Rod mills are key equipment in mineral processing, and the operating condition of the steel rods, which serve as the grinding media, directly affects grinding efficiency and operating costs. Traditional technologies commonly use manual observation methods with periodic shutdowns to determine the number of rods to be added. This not only shortens the effective operating time of the equipment but also easily leads to unplanned losses of high-value steel rods due to imbalanced filling rates, fluctuations in grinding efficiency, and increased unit energy consumption. Furthermore, manual observation makes it difficult to detect abnormal wear of the steel rods, which can easily cause rod breakage accidents, leading to equipment downtime, capacity losses, and impacting production continuity and economic benefits.

[0024] To address the aforementioned issues, this application provides a rod mill control method that is compatible with a rod mill provided in this application.

[0025] First, the embodiments of this application will describe the rod mill. For example... Figure 1 and Figure 2 The figures shown are a side view and a front view of a rod mill provided in an embodiment of this application, including: a cylinder 1, a first feed inlet 101, a second feed inlet 102, and a discharge inlet 103.

[0026] The first feed inlet 101 and the second feed inlet 102 are located at the two ends of the cylinder 1, respectively, and are used to feed the material to be ground into the cylinder 1. When the cylinder 1 rotates, the material is gradually broken and refined under the impact and grinding action of multiple grinding media inside the cylinder 1, and is discharged through the discharge inlet 103.

[0027] To improve grinding efficiency, all grinding media are made of steel rods of the same specification. The length of the steel rods is matched (close to) the length of cylinder 1. "Close to" means that the length of the steel rods is slightly less than the length of cylinder 1.

[0028] Having described the rod mill above, this application embodiment will continue to describe a rod mill control method as follows.

[0029] like Figure 3 The diagram shown is a flowchart of a rod mill control method provided in an embodiment of this application, including steps S1-S3.

[0030] Step S1: Determine the actual operating current value of the rod mill within a preset time period based on the actual operating conditions of the rod mill; Step S2: Determine the actual filling rate of the grinding media in the rod mill based on the preset correlation between the operating current value and the filling rate and the actual operating current value. Step S3: When the actual filling rate is less than the preset standard filling rate, determine the target replenishment quantity of the grinding media based on the filling rate, the preset filling relationship between the grinding media and the rod mill, and the actual filling rate and the preset standard filling rate, and add grinding media that match the target replenishment quantity to the rod mill.

[0031] Regarding step S1, the actual operating current value of the rod mill within a preset time period is determined based on the actual operating conditions of the rod mill, including steps S111-S112.

[0032] Step S111: Based on the actual operating conditions of the rod mill, obtain the unit current value of the rod mill for each unit time within a preset time period. Step S112: Preprocess all unit current values ​​to determine the actual operating current value.

[0033] Regarding step S111, based on the actual operating conditions of the rod mill, the unit current value of the rod mill is obtained for each unit of time within a preset time period.

[0034] The actual operating condition of a rod mill refers to the stable state in which all core operating parameters meet the design specifications and process requirements during continuous operation. This means that the rod mill is in normal working condition. In other words, its key operating indicators (including mechanical load, drive speed, material filling rate, etc.) are all within reasonable threshold ranges, and the dynamic equilibrium system characteristics can be reflected by current characteristic values ​​(such as mean, fluctuation amplitude, harmonic components, etc.).

[0035] Specifically, under normal load conditions: the mechanical load manifests as the interaction force between the steel bar group and the material. Under normal conditions, the load matches the motor output torque, and the current value remains stable within the rated range (e.g., ±5% fluctuation). For example, when the steel bar filling rate is 35%-45% of the design value and the material particle size distribution meets the process requirements, the time-domain waveform of the drive current exhibits a smooth periodic change (without sudden increases / decreases), and the frequency-domain harmonic distortion rate is less than 5%.

[0036] Maintaining the correct rotational speed: The cylinder rotational speed is maintained at 60%-75% of the critical speed (typically around 10-18 rpm) to ensure that the steel bars are effectively ground near the balance point of centrifugal force and gravity. Abnormal rotational speed (such as a 10% drop in speed due to a transmission system malfunction) will change the trajectory of the steel bars, causing an abnormal increase (overload) or decrease (idling) in the current amplitude.

[0037] Reasonable material filling rate: The proportion of material volume to the effective volume of the cylinder (usually 25%-35%) is optimized in conjunction with the steel bar filling rate. This avoids direct collisions between steel bars due to insufficient material (resulting in high-frequency current oscillations) and also prevents insufficient grinding space due to excessive material (resulting in continuous current overruns). For example, when the material filling rate is 28%, the average current is 92% of the rated value, and the power factor remains stable in the high-efficiency range of 0.85-0.9.

[0038] The preset time period is a continuous time interval pre-set for periodic monitoring, such as one hour, one day, one production shift, etc. The systematic collection of current data can be achieved through current sensors and other related devices.

[0039] A unit of time is the smallest unit of time divided within a preset time period according to a preset sampling interval, such as one minute or one second. The unit current value can be an instantaneous current value directly collected by a sensor, or it can be the corresponding average current value within a unit of time. The unit current value corresponds to the motor current of a rod mill, such as the current values ​​of each phase of a three-phase motor.

[0040] Regarding step S112, all unit current values ​​are preprocessed to determine the actual operating current value.

[0041] Preprocessing refers to the operation of cleaning and correcting the unit current data, including removing outliers (such as sensor transient failures), filtering and smoothing (suppressing high-frequency noise), and averaging (reducing random fluctuations), and finally generating reliable data (i.e., actual operating current value) that can truly reflect the steady-state operating current of the rod mill.

[0042] For example, during the normal operation of the rod mill, the instantaneous current value is collected once every minute (i.e., per unit time). After removing obviously abnormal current values ​​such as start-up current, shutdown current and cutting current, all the instantaneous current values ​​collected within one hour (i.e., the preset time period) are used as the weighted average of the remaining instantaneous current values ​​as the actual operating current value for this hour.

[0043] Furthermore, in this embodiment of the application, it is also possible to determine whether the rod mill is abnormal based on the unit current value, specifically steps S121-S124.

[0044] Step S121: Obtain the unit current value of the rod mill in each unit of time within a preset time period; Step S122: Select the maximum and minimum unit current values ​​from multiple unit current values; Step S123: Determine the actual current fluctuation value for a preset time period based on the maximum and minimum unit current values. Step S124: If the actual current fluctuation value exceeds the preset current fluctuation value, determine that the rod mill is abnormal, control the rod mill to stop, and control the grinding media in the rod mill to be removed.

[0045] Regarding step S121, the relevant descriptions of the preset time period, unit time, and unit current value can be found in the foregoing explanation.

[0046] Regarding step S122, the maximum and minimum unit current values ​​are selected from multiple unit current values.

[0047] It should be noted that before selecting the maximum and minimum unit current values ​​from multiple unit current values, the unit current values ​​obtained in step S121 need to be preprocessed to a certain extent, such as removing obviously abnormal current values ​​such as start-up current, stop current, and cut-off current, and then selecting the maximum and minimum unit current values ​​from the remaining multiple unit current values.

[0048] Regarding step S123, the actual current fluctuation value for a preset time period is determined based on the maximum and minimum unit current values.

[0049] For example, the difference between the maximum and minimum unit current values ​​can be used as the actual current fluctuation value for a preset time period.

[0050] Regarding step S124, if the actual current fluctuation value exceeds the preset current fluctuation value, it is determined that the rod mill is abnormal, the rod mill is stopped, and the grinding media in the rod mill are removed.

[0051] The method for determining the preset current fluctuation value includes: determining the preset current fluctuation value corresponding to the preset time period based on the actual operating current value and the preset fluctuation coefficient.

[0052] The preset current fluctuation value is the product of the actual operating current value and the preset fluctuation coefficient, used to determine whether the current fluctuation is within a reasonable range. For example, a preset fluctuation coefficient of 20% allows the unit current value within a preset time period to fluctuate within ±10% of the actual operating current value. The actual current fluctuation value reflects the maximum fluctuation of the motor current within the preset time period. If the actual current fluctuation value exceeds the preset current fluctuation value, it indicates that the motor is operating unstable within the preset time period and is prone to abnormal situations, requiring timely handling, such as stopping the control rod mill and removing the grinding media from the control rod mill, to ensure production safety.

[0053] Regarding step S2, the actual filling rate of the grinding media in the rod mill is determined based on the preset correlation between the operating current value and the filling rate, as well as the actual operating current value.

[0054] The method for determining the preset association relationship includes steps S21-S23.

[0055] Step S21: In each of the multiple sample time periods, obtain the sample operating current value of the rod mill, the sample distance between the upper surface of the grinding media and the center of the rod mill, and the inner diameter of the rod mill cylinder. Step S22: Within each sample time period, determine the sample filling rate of the grinding media based on the sample distance and the inner diameter of the cylinder. Step S23: Determine the preset correlation relationship based on the fill rate of all samples and the sample running current value corresponding to each fill rate.

[0056] Regarding step S21, within each of the multiple sample time periods, the sample operating current value of the rod mill, the sample distance between the upper surface of the grinding media and the center of the rod mill, and the inner diameter of the rod mill cylinder are obtained.

[0057] The sample time period refers to a pre-set continuous time window used to collect equipment operation data, such as every 5 minutes, every hour, or every day.

[0058] It is understandable that the sample time period can be divided into multiple unit time periods, and the unit current value corresponding to each unit time period can be obtained to determine the sample operating current value of the sample time period.

[0059] For example, if the sample period is a certain hour, the instantaneous current value is collected once per minute within that hour. The instantaneous current value can be obtained by measuring the actual current value of the drive motor of the rod mill using a sensor. After removing obviously abnormal current values ​​such as start-up current, stop current, and cut-off current, the weighted average of all the instantaneous current values ​​collected in that hour is taken as the sample operating current value for that hour.

[0060] The sample distance refers to the vertical distance from the top surface of the grinding media (usually steel rods) to the central axis of rotation of the rod mill (the center of the rod mill) after it has accumulated inside the cylinder 1. The inner diameter of the cylinder refers to the internal diameter of the cylinder 1 of the rod mill. For example, Figure 4 for Figure 2 The corresponding simplified cross-sectional structure of the rod mill when it is stationary, where O is the center of the rod mill, D is the inner diameter of the cylinder, and h is the sample distance.

[0061] Regarding step S22, within each sample time period, the sample filling rate of the grinding media is determined based on the sample distance and the inner diameter of the cylinder.

[0062] Specifically, within each sample time period, the arc-shaped area formed by the stacked steel bars is calculated based on the corresponding sample distance (chord distance) and the inner diameter of the cylinder (diameter). Figure 4 The ratio of the shaded area to the cross-sectional area of ​​the cylinder is called the sample fill rate φ.

[0063] Regarding step S23, a preset correlation relationship is determined based on the fill rate of all samples and the sample running current value corresponding to each fill rate.

[0064] Specifically, based on the fill rate of all samples and the sample operating current value corresponding to each fill rate, a regression equation is formulated using linear regression analysis. ,in Let A be the filling rate, A be the operating current value, and a and b be coefficients. The least squares method is used to solve the regression equation to find the minimum sum of squared errors, thereby obtaining b and a in the regression equation. Finally, a predetermined correlation between the filling rate and the operating current value of the rod mill is obtained.

[0065] Regarding step S3, if the actual filling rate is less than the preset standard filling rate, the target replenishment quantity of the grinding media is determined based on the filling rate, the preset filling relationship between the grinding media and the rod mill, as well as the actual filling rate and the preset standard filling rate, and grinding media matching the target replenishment quantity are added to the rod mill.

[0066] Determining the target replenishment quantity of grinding media includes steps S31-S33.

[0067] Step S31: When the actual filling rate is less than the preset standard filling rate, determine the quantity to be added for verification based on the filling rate, the preset filling relationship between the grinding media and the rod mill, and the actual filling rate and the preset standard filling rate. Step S32: If the quantity to be verified is an integer, determine the quantity to be verified as the target quantity. Step S33: If the quantity to be verified is not an integer, select the target rounding strategy from multiple rounding strategies and use the target rounding strategy to correct the quantity to be verified in order to determine the target quantity.

[0068] Regarding step S31, if the actual filling rate is less than the preset standard filling rate, the quantity to be added is determined based on the filling rate, the preset filling relationship between the grinding media and the rod mill, and the actual filling rate and the preset standard filling rate.

[0069] If the actual filling rate is greater than or equal to the preset standard filling rate, the rod mill does not require rod replenishment. If the actual filling rate is less than the preset standard filling rate, the rod mill requires rod replenishment.

[0070] The method for determining the preset standard filling rate includes steps S311-S312.

[0071] Step S311: Under the condition that the upper surface of the grinding media and the feed port of the rod mill meet the standard conditions, obtain the standard distance between the upper surface of the grinding media and the center of the rod mill, and obtain the inner diameter of the cylinder of the rod mill. Step S312: Determine the preset standard filling rate based on the standard distance and the inner diameter of the cylinder.

[0072] Regarding step S311, the standard state refers to the state in which the rod mill operates under ideal conditions, i.e., the steel rod filling amount is moderate, the material supply is balanced, the grinding efficiency reaches the design target, and there is no abnormal wear or material blockage. Under this state, a reasonable gap is maintained between the upper surface of the grinding media and the feed inlet to reduce material splashing or accumulation, ensuring smooth feeding and optimal grinding space.

[0073] For example, Figure 4 The dashed ellipse represents the outlet of the channel connecting the ore feed port to the inside of the cylinder. In the standard state, the lower edge of this outlet is tangent to the plane (shaded area) formed by the accumulation of steel bars.

[0074] Regarding step S312, the preset standard filling rate is determined based on the standard distance and the inner diameter of the cylinder. This can be referenced from the previously described steps for determining the sample filling rate, i.e., calculating the arc-shaped area formed by the stacked steel bars (e.g., ...). Figure 4 The ratio of the shaded area to the cross-sectional area of ​​the cylinder.

[0075] Regarding step S31, if the actual filling rate is less than the preset standard filling rate, the quantity to be added is determined based on the filling rate, the preset filling relationship between the grinding media and the rod mill, and the actual filling rate and the preset standard filling rate.

[0076] The steps to determine the number of supplements to be verified can be expressed by formula (1).

[0077] (1) Where P represents the number of supplementary verifications. To preset the standard fill rate, The actual filling rate is given by D, where D is the inner diameter of the cylinder and d is the diameter of the steel rod.

[0078] Regarding step S32, if the quantity to be verified is an integer, the quantity to be verified is determined as the target quantity.

[0079] Since steel bars are usually added whole, if the quantity to be verified obtained in step S31 is an integer, such as P=18, then 18 steel bars are directly added to the bar mill.

[0080] Regarding step S33, if the quantity to be verified is not an integer, select the target rounding strategy from multiple rounding strategies, and use the target rounding strategy to correct the quantity to be verified, and determine the corrected quantity to be verified as the target quantity.

[0081] If the quantity to be verified is not an integer, a quantity of replacement bars suitable for the current working condition needs to be selected. The rounding strategy to be selected includes at least one of: rounding up, rounding down, and rounding to the nearest whole number. If it is necessary to reduce the probability of efficiency loss due to insufficient replacement bars, then rounding up is determined as the target rounding strategy. If it is necessary to control steel bar costs and reduce over-replenishment, then rounding down is determined as the target rounding strategy. If it is necessary to balance accuracy and cost, then rounding to the nearest whole number is determined as the target rounding strategy.

[0082] The following provides a specific embodiment to detail a rod mill control method provided in this application.

[0083] Under the operating conditions of an iron ore rod mill in a water plant, the operating current value of the rod mill is collected every minute. The start-up current, cutting current and shutdown current are removed from the collected data to determine the average current value per hour, which is then used as the actual operating current value.

[0084] With the rod mill operating under standard conditions, historical data from the past 5 days of operation were used as sample fill rate and sample operating current values. Linear regression analysis was then used to derive the pre-defined correlation between the fill rate and the operating current value. ,in Where A is the fill rate and A is the operating current value.

[0085] Under the condition that the upper surface of the grinding media and the feed inlet of the rod mill meet the standard conditions, the standard distance is h=400mm, the inner diameter of the cylinder is D=3100mm, and the preset standard filling rate is determined accordingly. =34%. The diameter of the steel rods in the rod mill is d=120mm. According to formula (1), when the difference between the actual filling rate and the preset standard filling rate is 1%, the number of rods to be added is 6.67. In order to balance accuracy and cost, the 6.67 rods are rounded up and 7 steel rods are added to the rod mill.

[0086] After applying the rod mill control method provided in the embodiments of this application, the filling rate of the rod mill in the iron ore mine of a mining company was stabilized and the steel rod loss was effectively reduced. The steel rod loss was reduced from 0.91 yuan / ton of product to 0.72 yuan / ton of product, a reduction of 20.9%.

[0087] In summary, the embodiments of this application provide a rod mill control method, including: determining the actual operating current value of the rod mill within a preset time period based on the actual operating conditions of the rod mill; determining the actual filling rate of the grinding media in the rod mill based on a preset correlation between the operating current value and the filling rate and the actual operating current value; and, if the actual filling rate is less than a preset standard filling rate, determining the target replenishment quantity of the grinding media based on the filling rate, the preset filling relationship between the grinding media and the rod mill, and the actual filling rate and the preset standard filling rate, and adding grinding media matching the target replenishment quantity to the rod mill.

[0088] It is evident that determining the actual filling rate of the grinding media by using the actual operating current value of the rod mill effectively reduces the production capacity loss caused by traditional manual sampling and shutdown. At the same time, it can accurately determine the number of replacement rods, significantly reducing the production costs caused by redundant steel rods. This not only improves the operating efficiency and economy of the rod mill, but also achieves synergistic optimization of resource utilization and equipment reliability. It has broad application prospects in the intelligent upgrading of heavy industries such as mining and building materials.

[0089] Based on the same inventive concept, embodiments of this application also provide, as follows: Figure 5 The illustrated rod mill control device includes: The actual operating current value determination module 51 is used to determine the actual operating current value of the rod mill within a preset time period based on the actual operating conditions of the rod mill. The actual filling rate determination module 52 is used to determine the actual filling rate of the grinding media based on the preset correlation between the operating current value and the filling rate, as well as the actual operating current value. The supplementary control module 53 is used to determine the target supplementary quantity of grinding media based on the filling rate, the preset filling relationship between the grinding media and the rod mill, and the actual filling rate and the preset standard filling rate when the actual filling rate is less than the preset standard filling rate, and to add grinding media matching the target supplementary quantity to the rod mill.

[0090] Furthermore, the device also includes a data acquisition and preprocessing module, used for: Based on the actual operating conditions of the rod mill, obtain the unit current value of the rod mill for each unit time within a preset time period; All unit current values ​​are preprocessed to determine the actual operating current value.

[0091] Furthermore, the device also includes a preset association determination module, used for: Within each of the multiple sample time periods, the sample operating current value of the rod mill, the sample distance between the upper surface of the grinding media and the center of the rod mill, and the inner diameter of the rod mill cylinder are obtained. Within each sample time period, the sample filling rate of the grinding media is determined based on the sample distance and the inner diameter of the cylinder. A preset correlation is determined based on the fill rate of all samples and the sample running current value corresponding to each fill rate.

[0092] Furthermore, the device also includes a preset standard fill rate determination module, used for: Under the condition that the upper surface of the grinding media and the feed port of the rod mill meet the standard conditions, obtain the standard distance between the upper surface of the grinding media and the center of the rod mill, and obtain the inner diameter of the rod mill cylinder; Determine the preset standard filling rate based on the standard distance and the inner diameter of the cylinder.

[0093] Furthermore, the device also includes a current fluctuation monitoring and control module for: Obtain the unit current value of the rod mill in each unit of time within a preset time period; Select the maximum and minimum unit current values ​​from multiple unit current values; The actual current fluctuation value for a preset time period is determined based on the maximum and minimum unit current values. If the actual current fluctuation value exceeds the preset current fluctuation value, the rod mill is identified as malfunctioning, and the rod mill is shut down and the grinding media in the rod mill are removed.

[0094] Furthermore, the device also includes a preset current fluctuation value determination module, used for: Based on the actual operating current value and the preset fluctuation coefficient, determine the preset current fluctuation value corresponding to the preset time period.

[0095] Furthermore, the device also includes a target replenishment quantity determination module, used for: When the actual filling rate is less than the preset standard filling rate, the quantity to be added is determined based on the filling rate, the preset filling relationship between the grinding media and the rod mill, and the actual filling rate and the preset standard filling rate. If the quantity to be verified is an integer, the quantity to be verified is determined as the target quantity. If the quantity to be verified is not an integer, select the target rounding strategy from multiple rounding strategies, and use the target rounding strategy to correct the quantity to be verified. Then, determine the corrected quantity to be verified as the target quantity.

[0096] Based on the same inventive concept, embodiments of this application also provide, as follows: Figure 6 An electronic device shown includes: Processor 61; Memory 62 is used to store executable instructions of processor 61; The processor 61 is configured to execute a rod mill control method as described above.

[0097] Based on the same inventive concept, embodiments of this application also provide a non-transitory computer-readable storage medium, which, when the instructions in the storage medium are executed by the processor 61 of an electronic device, enables the electronic device to execute a rod mill control method as described above.

[0098] Since the electronic device described in this embodiment is an electronic device used to implement the information processing method in the embodiments of this application, those skilled in the art can understand the specific implementation methods and various variations of the electronic device in this embodiment based on the information processing method described in the embodiments of this application. Therefore, how the electronic device implements the method in the embodiments of this application will not be described in detail here. Any electronic device used by those skilled in the art to implement the information processing method in the embodiments of this application falls within the scope of protection of this application.

[0099] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0100] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0101] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0102] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0103] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0104] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A rod mill control method, characterized in that, The method includes: Based on the actual operating conditions of the rod mill, determine the actual operating current value of the rod mill within a preset time period; The actual filling rate of the grinding media in the rod mill is determined based on the preset correlation between the operating current value and the filling rate, as well as the actual operating current value. If the actual filling rate is less than the preset standard filling rate, the target replenishment quantity of the grinding media is determined based on the filling rate, the preset filling relationship between the grinding media and the rod mill, the actual filling rate and the preset standard filling rate, and the grinding media matching the target replenishment quantity is added to the rod mill. The method for determining the preset association relationship includes: Within each of the multiple sample time periods, the sample operating current value of the rod mill, the sample distance between the upper surface of the grinding media and the center of the rod mill, and the inner diameter of the rod mill cylinder are obtained. Within each of the sample time periods, the sample filling rate of the grinding body is determined based on the sample distance and the inner diameter of the cylinder. The preset correlation relationship is determined based on all the sample fill rates and the sample operating current value corresponding to each sample fill rate; Determining the target replenishment quantity of the grinding media includes: If the actual filling rate is less than the preset standard filling rate, the quantity to be added is determined based on the filling rate, the preset filling relationship between the grinding media and the rod mill, and the actual filling rate and the preset standard filling rate. The formula for determining the number of supplementary materials to be verified is as follows: ； Where P represents the number of supplementary verifications. To preset the standard fill rate, The actual filling rate is given by D, where D is the inner diameter of the cylinder and d is the diameter of the steel rod. If the quantity to be verified is an integer, the quantity to be verified is determined as the target quantity. If the quantity to be verified is not an integer, a target rounding strategy is selected from multiple rounding strategies, and the quantity to be verified is corrected using the target rounding strategy. The corrected quantity to be verified is then determined as the target quantity.

2. The rod mill control method as described in claim 1, characterized in that, The step of determining the actual operating current value of the rod mill within a preset time period based on the actual operating conditions of the rod mill includes: Based on the actual operating conditions of the rod mill, the unit current value of the rod mill in each unit time within the preset time period is obtained; All the unit current values ​​are preprocessed to determine the actual operating current value.

3. The rod mill control method as described in claim 1, characterized in that, The method for determining the preset standard fill rate includes: When the upper surface of the grinding media and the feed inlet of the rod mill meet the standard conditions, the standard distance between the upper surface of the grinding media and the center of the rod mill and the inner diameter of the cylinder of the rod mill are obtained. The preset standard filling rate is determined based on the standard distance and the inner diameter of the cylinder.

4. The rod mill control method as described in claim 1, characterized in that, The method further includes: Obtain the unit current value of the rod mill for each unit time within the preset time period; The maximum and minimum unit current values ​​are selected from the multiple unit current values. The actual current fluctuation value for the preset time period is determined based on the maximum and minimum unit current values. If the actual current fluctuation value exceeds the preset current fluctuation value, the rod mill is determined to be abnormal, the rod mill is stopped, and the grinding media in the rod mill is removed.

5. The rod mill control method as described in claim 4, characterized in that, The method for determining the preset current fluctuation value includes: Based on the actual operating current value and the preset fluctuation coefficient, the preset current fluctuation value corresponding to the preset time period is determined.

6. A rod mill control device, characterized in that, The apparatus is used to perform the rod mill control method as described in any one of claims 1-5, the apparatus comprising: The actual operating current value determination module is used to determine the actual operating current value of the rod mill within a preset time period based on the actual operating conditions of the rod mill. The actual filling rate determination module is used to determine the actual filling rate of the grinding media in the rod mill based on a preset correlation between the operating current value and the filling rate, and the actual operating current value. The supplementary control module is used to determine the target supplementary quantity of the grinding media based on the filling rate, the preset filling relationship between the grinding media and the rod mill, the actual filling rate and the preset standard filling rate when the actual filling rate is less than the preset standard filling rate, and to add the grinding media matching the target supplementary quantity to the rod mill. The device also includes a preset association determination module, used for: Within each of the multiple sample time periods, the sample operating current value of the rod mill, the sample distance between the upper surface of the grinding media and the center of the rod mill, and the inner diameter of the rod mill cylinder are obtained. Within each sample time period, the sample filling rate of the grinding media is determined based on the sample distance and the inner diameter of the cylinder. Determine the preset correlation based on the fill rate of all samples and the sample running current value corresponding to each fill rate; The device also includes a target replenishment quantity determination module, used for: When the actual filling rate is less than the preset standard filling rate, the quantity to be added is determined based on the filling rate, the preset filling relationship between the grinding media and the rod mill, and the actual filling rate and the preset standard filling rate. The formula for determining the number of supplementary materials to be verified is as follows: ； Where P represents the number of supplementary verifications. To preset the standard fill rate, The actual filling rate is given by D, where D is the inner diameter of the cylinder and d is the diameter of the steel rod. If the quantity to be verified is an integer, the quantity to be verified is determined as the target quantity. If the quantity to be verified is not an integer, select the target rounding strategy from multiple rounding strategies, and use the target rounding strategy to correct the quantity to be verified. Then, determine the corrected quantity to be verified as the target quantity.

7. An electronic device, characterized in that, include: processor; Memory used to store the processor's executable instructions; The processor is configured to execute a rod mill control method as described in any one of claims 1 to 5.

8. A non-transitory computer-readable storage medium, characterized in that, When the instructions in the storage medium are executed by the processor of the electronic device, the electronic device is able to perform a rod mill control method as described in any one of claims 1 to 5.

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