A pellet grinding water addition control method, device, grinding feed water addition system and storage medium

Abstract

The present invention discloses a pellet grinding water addition control method, device, grinding feed water addition system and storage medium, which are applied to the technical field of steel smelting. In order to solve the problems of low water addition control efficiency and low accuracy in the pellet grinding process, the method comprises the following steps: obtaining the amount of new feed wet ore, the original moisture content of the new feed and the target value of the grinding concentration of the mill; obtaining the return sand ratio, the overflow concentration and the underflow return sand concentration; calculating the mill water addition amount of the mill based on the amount of new feed wet ore, the original moisture content of the new feed, the target value of the grinding concentration, the return sand ratio, the overflow concentration and the underflow return sand concentration; calculating the pump pool water addition amount based on the amount of new feed wet ore, the original moisture content of the new feed, the overflow concentration and the mill water addition amount; controlling the water addition of the mill based on the mill water addition amount, and controlling the water addition of the pump pool based on the pump pool water addition amount; the method has high calculation efficiency and accuracy, is conducive to more accurate control of grinding water addition, and is conducive to improving grinding efficiency and product quality.

Description

Technical Field

[0001] The present invention relates to the technical field of steel smelting, and in particular to a method and device for controlling water addition in pellet grinding, a grinding feed water addition system, and a computer-readable storage medium. Background Art

[0002] During the pellet production process, iron ore raw materials, whether mined or purchased, do not meet the particle size and grade requirements for pellet production. Therefore, the iron ore raw materials must be ground to produce an iron concentrate that meets the pellet production requirements. Ore dressing operations primarily include grinding, magnetic separation, concentrate concentration, filtration and drying, and tailings treatment. Grinding is the process of crushing the crushed ore to a suitable particle size and feeding the crushed minerals to the separation process. During grinding, the ore is crushed, allowing the effective mineral components to be separated from the gangue, and different effective mineral components to be separated from each other. Grinding is a key process in providing raw materials for separation. Control over the grinding process directly affects whether the ground product achieves the appropriate particle size, thereby impacting the separation process and the quality of the beneficiation products.

[0003] Grinding concentration is one of the key parameters that influences grinding efficiency and product particle size. Appropriate grinding concentration can improve grinding efficiency. Grinding concentration refers to the percentage of solid material mass contained in the slurry. It not only affects mill production capacity, product quality, and power consumption, but also affects the overflow particle size of the classifier, thereby affecting the mineral processing effect. The grinding concentration in the mill during the grinding process is very important for the grinding efficiency of the mill. During the classification process, the grinding concentration has a direct impact on the classification particle size. The control of grinding concentration is mainly achieved by adjusting the concentration by controlling the amount of water added.

[0004] At present, the control method of ball mill grinding concentration mainly relies on workers' experience and judgment, and manually adjusts the feed rate and water supply. This control method has a relatively large accuracy error, which affects the grinding efficiency and product quality.

[0005] In view of this, how to improve the control accuracy of water addition in pellet grinding and improve grinding efficiency and product quality has become a problem that needs to be solved by those skilled in the art. Summary of the Invention

[0006] The purpose of the embodiments of the present invention is to provide a pellet grinding water addition control method, device, grinding feed water addition system and computer-readable storage medium, which have high computational efficiency and accuracy, facilitate more accurate control of grinding water addition, and improve grinding efficiency and product quality.

[0007] To solve the above technical problems, the embodiments of the present invention provide the following technical solutions:

[0008] In one aspect, the present invention provides a method for controlling water addition in pellet milling, which is applied to a mill feed water addition system. The mill feed water addition system includes a mill, a pump tank, and a cyclone. The method includes:

[0009] Obtaining the wet ore amount of the new feed of the mill, the original moisture content of the new feed and the target grinding concentration of the mill;

[0010] Obtaining the sand return ratio, the overflow concentration of the cyclone, and the underflow sand return concentration;

[0011] Calculating the mill water addition amount of the mill based on the wet ore amount of the new feed, the original moisture content of the new feed, the target grinding concentration of the mill, the return sand ratio, the overflow concentration and the underflow return sand concentration;

[0012] The pump pool water addition amount is calculated based on the wet ore amount of the new feed, the original moisture content of the new feed, the overflow concentration and the water addition amount of the mill;

[0013] The water addition to the mill is controlled based on the water addition amount of the mill, and the water addition to the pump pool is controlled based on the water addition amount of the pump pool.

[0014] In an exemplary embodiment, the mill water addition amount of the mill is calculated based on the wet ore amount of the new feed, the original moisture content of the new feed, the target grinding concentration of the mill, the return sand ratio, the overflow concentration, and the underflow return sand concentration, including:

[0015] Calculating the dry ore content and moisture content of the new feed to the mill based on the wet ore content of the new feed and the original moisture content of the new feed;

[0016] Determining the amount of dry ore overflowing from the cyclone based on the amount of dry ore in the new feed, and calculating the amount of overflow water from the cyclone based on the overflow concentration and the amount of dry ore overflowing from the cyclone;

[0017] Calculating the dry ore content of the cyclone return sand and the water content of the cyclone return sand based on the cyclone overflow dry ore content, the return sand ratio and the underflow return sand concentration;

[0018] Calculating the total dry ore amount entering the mill based on the dry ore amount of the cyclone return sand and the dry ore amount of the new feed;

[0019] The amount of water added to the mill is calculated based on the target grinding concentration of the mill, the total dry ore content, the moisture content of the new feed, and the moisture content of the cyclone return sand.

[0020] In an exemplary embodiment, the calculation of the mill water addition amount based on the mill grinding concentration target value, the total dry ore content, the moisture content of the new feed, and the moisture content of the cyclone return sand includes:

[0021] The mill water addition amount is calculated based on the target grinding concentration of the mill, the total dry ore content, the moisture content of the new feed, and the moisture content of the cyclone return sand, in combination with a first calculation formula; wherein the first calculation formula is:

[0022] water_MJ = (WI MJD *(1 - DI MJ ) / DI MJ ) - water_XGL - water_FS; where water_MJ represents the amount of water added to the mill, WI MJD Indicates the total dry ore content, DI MJ It indicates the target value of grinding concentration of the mill, water_XGL indicates the moisture content of the new feed, and water_FS indicates the moisture content of the cyclone return sand.

[0023] In an exemplary embodiment, the calculation of the cyclone return sand dry ore amount and the cyclone return sand moisture content based on the cyclone overflow dry ore amount, the return sand ratio, and the underflow return sand concentration includes:

[0024] Calculating the amount of dry ore returned from the cyclone based on the amount of dry ore overflowed from the cyclone and the return sand ratio;

[0025] The moisture content of the cyclone return sand is calculated based on the dry ore content of the cyclone return sand and the underflow return sand concentration.

[0026] In an exemplary embodiment, the calculating the amount of dry ore returned from the cyclone based on the amount of dry ore overflowed from the cyclone and the return sand ratio includes:

[0027] Multiplying the cyclone overflow dry ore amount and the return sand ratio to obtain the cyclone return sand dry ore amount;

[0028] Then, the calculation of the moisture content of the cyclone return sand based on the dry ore amount of the cyclone return sand and the underflow return sand concentration includes:

[0029] Based on the dry ore content of the cyclone return sand and the underflow return sand concentration, the moisture content of the cyclone return sand is calculated in combination with the second calculation formula, wherein the second calculation formula is:

[0030] water_FS = WI FSD * (1 - DI FS ) / DI FS ; Among them, water_FS represents the water content of the cyclone return sand, WI FSD Indicates the amount of dry ore returned from the cyclone, DI FS Indicates the bottom flow return sand concentration.

[0031] In an exemplary embodiment, the pump pool water addition amount is calculated based on the wet ore amount of the new feed, the original moisture content of the new feed, the overflow concentration, and the mill water addition amount, including:

[0032] Calculating the dry ore content and moisture content of the new feed to the mill based on the wet ore content of the new feed and the original moisture content of the new feed;

[0033] Determining the amount of dry ore overflowing from the cyclone based on the amount of dry ore in the new feed, and calculating the amount of overflow water from the cyclone based on the overflow concentration and the amount of dry ore overflowing from the cyclone;

[0034] Determining the total amount of water added based on the overflow water volume of the cyclone;

[0035] The pump pool water addition amount is calculated based on the total water addition amount, the moisture content of the new feed and the mill water addition amount.

[0036] In an exemplary embodiment, the calculating the overflow water volume of the cyclone based on the overflow concentration and the overflow dry ore volume of the cyclone includes:

[0037] Based on the overflow concentration and the cyclone overflow dry ore volume, combined with a third calculation formula, the cyclone overflow water volume is calculated; wherein the third calculation formula is:

[0038] water_YL = WI YLD * (1 - DI YL ) / DI YL ; Among them, water_YL represents the overflow water volume of the cyclone, WI YLD Indicates the amount of dry ore overflowing from the cyclone, DI YL Indicates overflow concentration.

[0039] Another aspect of the present invention provides a pellet mill water addition control device, which is applied to a grinding feed water addition system. The grinding feed water addition system includes a mill, a pump tank, and a cyclone. The method includes:

[0040] The first acquisition module is used to obtain the amount of wet ore of the new feed of the mill, the original moisture content of the new feed and the target value of the grinding concentration of the mill;

[0041] The second acquisition module is used to obtain the sand return ratio, the overflow concentration of the cyclone and the underflow sand return concentration;

[0042] a first calculation module, configured to calculate a mill water addition amount of the mill based on the wet ore amount of the new feed, the original moisture content of the new feed, the target grinding concentration of the mill, the return sand ratio, the overflow concentration, and the underflow return sand concentration;

[0043] A second calculation module is configured to calculate the pump pool water addition amount based on the new feed wet ore amount, the new feed original moisture content, the overflow concentration and the mill water addition amount;

[0044] A control module is used to control the water addition to the mill based on the water addition amount of the mill, and to control the water addition to the pump pool based on the water addition amount of the pump pool.

[0045] Another aspect of the present invention provides a grinding feed water addition system, comprising a grinding mill, a pump tank, a cyclone, a storage device, and a processor, wherein:

[0046] The memory is used to store computer programs;

[0047] The processor is used to implement the steps of the pellet grinding water addition control method as described above when executing the computer program.

[0048] Another aspect of the present invention provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the steps of the pellet grinding water addition control method as described above are implemented.

[0049] It can be seen from the above technical solutions that the embodiments of the present invention have the following advantages:

[0050] A pellet grinding water addition control method is provided in an embodiment of the present invention, which is applied to a grinding feed water addition system. The grinding feed water addition system includes a mill, a pump pool, and a cyclone. The method includes: obtaining the amount of new feed wet ore, the original moisture content of the new feed, and the target grinding concentration of the mill; obtaining the return sand ratio, the overflow concentration, and the underflow return sand concentration of the cyclone; calculating the mill water addition amount of the mill based on the amount of new feed wet ore, the original moisture content of the new feed, the target grinding concentration of the mill, the return sand ratio, the overflow concentration, and the underflow return sand concentration; calculating the pump pool water addition amount based on the amount of new feed wet ore, the original moisture content of the new feed, the overflow concentration, and the mill water addition amount; controlling the water addition of the mill based on the mill water addition amount, and controlling the water addition of the pump pool based on the pump pool water addition amount.

[0051] It can be seen from this that the present invention obtains the new feed wet ore amount, the new feed original moisture content and the mill grinding concentration target value of the mill, obtains the return sand ratio, overflow concentration and underflow return sand concentration, and then according to the new feed wet ore amount, the new feed original moisture content, the mill grinding concentration target value, the return sand ratio, the overflow concentration and the underflow return sand concentration, the mill water addition amount of the mill can be further calculated, according to the new feed wet ore amount, the new feed original moisture content, the overflow concentration and the mill water addition amount, the pump pool water addition amount can be further calculated, and then the mill water addition is controlled according to the mill water addition amount, and the pump pool water addition is controlled according to the pump pool water addition amount; the present application comprehensively considers the entire grinding process to automatically calculate the mill water addition amount and the pump pool water addition amount, with high calculation efficiency and accuracy, which is conducive to more accurate control of grinding water addition, and is conducive to improving grinding efficiency and product quality.

[0052] In addition, the present invention also provides a corresponding implementation device, a grinding feed water addition system and a computer-readable storage medium for the method for calculating the amount of water added for pellet grinding, further making the method more practical. The device, electronic device and computer-readable storage medium have corresponding advantages. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the prior art and the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0054] Figure 1 This is a structural diagram of an existing grinding feed water addition system;

[0055] Figure 2 A schematic flow chart of a method for controlling water addition in pellet grinding provided by an embodiment of the present invention;

[0056] Figure 3 This is a structural block diagram of a pellet grinding water addition control device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0057] The embodiments of the present invention provide a pellet grinding water addition control method, device, grinding feed water addition system and computer-readable storage medium, which have high computational efficiency and accuracy, facilitate more accurate control of grinding water addition, and improve grinding efficiency and product quality.

[0058] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0059] It should be noted that if Figure 1 The grinding feed water adding system shown, the mill feed (new material amount) at the head of the mill and the bottom flow return sand of the cyclone classification, constitute the total feed amount of the mill. By adding water, a certain grinding concentration is formed inside the mill, and the material is ground. After grinding, it is discharged from the tail of the mill to the pump pool. The pump pool controls the slurry concentration by adding water, and the slurry is pumped into the classification cyclone through the slurry pump. The cyclone inlet concentration is very important and is an important indicator that affects the classification effect. After entering the cyclone, it is classified, and the overflow that meets the standards enters the next process link, and the unqualified ones return to the mill through the bottom flow for re-grinding. With respect to the grinding feed water adding system, the embodiment of the present invention proposes a pellet grinding water adding control method, please refer to Figure 2 , Figure 2 A schematic flow chart of a method for controlling water addition in pellet grinding provided by an embodiment of the present invention.

[0060] The method is applied to a grinding feed water adding system, which includes a grinding mill, a pump tank, and a cyclone. The method includes:

[0061] S110: obtaining the amount of wet ore of the new feed of the mill, the original moisture content of the new feed and the target value of the grinding concentration of the mill;

[0062] It should be noted that in actual application, the new feed wet ore amount WI of the current mill can be determined based on the new feed actually fed to the mill. N The original moisture content MI of the new feed corresponding to the raw material can be determined in advance through experiments based on the properties of the raw materials. N , that is, in practical applications, the original moisture content MI corresponding to different types of raw materials can be determined in advance N , and establish the corresponding relationship between the raw material type and the original moisture content, and store the corresponding relationship. When calculating the amount of water to be added, the original moisture content corresponding to the raw material can be determined from the established corresponding relationship between the raw material type and the original moisture content according to the current raw material type on the mill, thereby obtaining the new feed original moisture content MI N .

[0063] In addition, the grinding concentration target value DI MJIt can be determined in advance through experiments. Specifically, the grinding concentration target value DI determined in advance by the experiment can be MJ Parameters such as the grinding temperature and the water supply are stored in the memory in advance. During the grinding water control process, the required parameters can be directly obtained from the memory.

[0064] S120: Obtaining the sand return ratio, the overflow concentration of the cyclone, and the underflow sand return concentration;

[0065] It should be noted that for the cyclone, the overflow concentration DI of the cyclone can be determined in advance. YL , bottom flow return sand concentration DI FS Parameters such as the return sand ratio (C) are stored in memory, allowing direct access to required parameters when calculating and controlling water addition. The return sand ratio (C) refers to the ratio of the mass of coarse material (return sand) returned from the classifier (also known as the cyclone) to the original feed mass in closed-circuit grinding. It is a key indicator of grinding energy consumption and efficiency. The specific value of the return sand ratio can be calculated manually by manually obtaining the flow rate.

[0066] Of course, in actual application, during each control process, it is possible to first determine whether the type of raw material has changed. If it has not changed, the parameters such as the return sand ratio and the original moisture content of the new feed corresponding to the type of raw material obtained last time can be directly used. If the type of raw material has changed, the corresponding return sand ratio and the original moisture content of the new feed can be re-obtained according to the new type of raw material.

[0067] S130: Calculate the mill water addition amount of the mill based on the wet ore amount of the new feed, the original moisture content of the new feed, the target grinding concentration of the mill, the return sand ratio, the overflow concentration, and the underflow return sand concentration;

[0068] It is understandable that, in the embodiment of the present invention, after obtaining the above parameters, the wet ore volume WI of the new feed can be further calculated. N 、Original moisture content of new feed MI N , Grinding concentration target value DI MJ , return sand ratio C, overflow concentration DI YL and bottom flow return sand concentration DI FS , calculate the mill water addition amount water_MJ of the mill. The calculation process of S130 is as follows:

[0069] A: Based on the new feed wet ore volume WI N and the original moisture content of the new ore MI N , calculate the new feed dry ore amount WI of the mill ND and the moisture content of the new feed water_XGL;

[0070] Specifically, the amount of wet ore in the new feed WI N and the original moisture content of the new ore MI N , combined with the relation WI ND =WI N * (1 - MI N ), calculate the new feed dry ore amount WI of the mill ND . According to the new feed wet ore volume WI N and the original moisture content of the new ore MI N , combined with the relation water_XGL = WI N * MI N , calculate the moisture content of the new feed water_XGL.

[0071] B: Based on the dry ore content of new feed WI ND Determine the amount of dry ore overflowing from the cyclone WI YLD , and based on the overflow concentration DI YL and cyclone overflow dry ore volume WI YLD , calculate the overflow water volume of the cyclone water_YL;

[0072] It should be noted that according to the principle of balance, with the mill, pump pool and grading cyclone as the main circulation body, the mineral and water reach a balanced state in this circulation body. ND Equal to the cyclone overflow dry ore volume WI YLD , that is WI ND = WI YLD In addition, the total amount of water added during the circulation process, water_Add, is equal to the overflow water volume, water_YL, that is, water_Add = water_YL.

[0073] Specifically, combined with DI YL = WI YLD / (WI YLD + water_YL), we can determine the third calculation relationship water_YL = WI YLD *(1 - DI YL ) / DI YL , specifically according to the overflow concentration DI YL and cyclone overflow dry ore volume WI YLD , combined with the third calculation formula water_YL = WI YLD *(1 - DI YL ) / DI YL , calculate the overflow water volume water_YL of the cyclone.

[0074] C: Based on the cyclone overflow dry ore volume WIYLD , return sand ratio C and bottom flow return sand concentration DI FS , calculate the water content of the cyclone return sand water_FS, calculate the dry ore volume WI of the cyclone return sand FSD and the water content of the cyclone return sand water_FS;

[0075] It should be noted that in practical applications, the overflow dry ore volume WI of the cyclone can be used to calculate the dry ore volume. YLD and return sand ratio C, calculate the cyclone return sand dry ore volume WI FSD Specifically, the cyclone overflow dry ore volume WI YLD Multiply it by the sand return ratio C, which is WI FSD =WI YLD * C, get the cyclone return sand dry ore volume WI FSD .

[0076] Furthermore, according to the cyclone return sand dry ore volume WI FSD and bottom flow return sand concentration DI FS , calculate the water content of the cyclone return sand water_FS. Specifically, the dry ore volume of the cyclone return sand WI FSD and bottom flow return sand concentration DI FS , combined with the second calculation formula, calculate the water content of the cyclone return sand water_FS, where the second calculation formula is:

[0077] water_FS = WI FSD * (1 - DI FS ) / DI FS ; Among them, water_FS represents the water content of the cyclone return sand, WI FSD Indicates the amount of dry ore returned from the cyclone, DI FS Indicates the bottom flow return sand concentration.

[0078] D: Based on the cyclone return sand dry ore volume WI FSD And the new feed dry ore volume WI ND , calculate the total dry ore volume WI entering the mill MJD ;

[0079] It is understood that the total dry ore volume WI entering the mill is MJD Equal to the new feed dry ore volume WI ND The amount of dry ore returned from the cyclone WI FSD The sum of WI MJD = WI ND + WI FSD .

[0080] E: Based on the grinding concentration target value DI of the mill MJ , total dry ore volume WI MJD, the moisture content of the new feed water_XGL and the moisture content of the cyclone return sand water_FS, calculate the water addition amount water_MJ to the mill.

[0081] Specifically, when calculating the amount of water added to the mill, the relationship DI MJ = WI MJD / (water_MJ +water_XGL + water_FS), determine the first calculation relationship for calculating the amount of water added to the mill water_MJ = (WI MJD *(1 - DI MJ ) / DI MJ ) - water_XGL - water_FS, and then get the grinding concentration target value DI MJ , total dry ore volume WI MJD , the moisture content of the new feed water_XGL and the moisture content of the cyclone return sand water_FS, can be further calculated based on the grinding concentration target value DI of the mill. MJ , total dry ore volume WI MJD , the moisture content of the new feed water_XGL and the moisture content of the cyclone return sand water_FS, combined with the first calculation formula, calculate the water addition amount water_MJ to the mill.

[0082] S140: Calculate the pump pool water addition amount based on the new feed wet ore amount, the new feed original moisture content, the overflow concentration and the mill water addition amount;

[0083] It should be noted that, when the new feed wet ore volume WI is obtained N 、Original moisture content of new feed MI N , overflow concentration DI YL After calculating the water addition amount of the mill water_MJ, the water addition amount of the pump pool water_BC can be further calculated based on these parameters. The specific process is as follows:

[0084] F: Based on the new feed wet ore volume WI N and the original moisture content of the new ore MI N , calculate the new feed dry ore amount WI of the mill ND and the moisture content of the new feed water_XGL;

[0085] It should be noted that the implementation process of step F in the embodiment of the present invention is the same as that of step A in the above embodiment. In actual application, the new feed dry ore amount WI of the mill is calculated by step A. ND After obtaining the water content of the new feed water_XGL, step F can be skipped and the calculation result of step A can be directly obtained for the calculation of step S140.

[0086] G: Based on the dry ore content of new feed WI ND Determine the amount of dry ore overflowing from the cyclone WI YLD , and based on the overflow concentration DI YL and cyclone overflow dry ore volume WI YLD , calculate the overflow water volume of the cyclone water_YL;

[0087] It should be noted that according to the principle of balance, with the mill, pump pool and grading cyclone as the main circulation body, the mineral and water reach a balanced state in this circulation body. ND Equal to the cyclone overflow dry ore volume WI YLD , that is WI ND = WI YLD .

[0088] Specifically, combined with DI YL = WI YLD / (WI YLD + water_YL), we can determine the third calculation relationship water_YL = WI YLD *(1 - DI YL ) / DI YL , specifically according to the overflow concentration DI YL and cyclone overflow dry ore volume WI YLD , combined with the third calculation formula water_YL = WI YLD *(1 - DI YL ) / DI YL , calculate the overflow water volume water_YL of the cyclone.

[0089] In addition, in actual application, step G in the embodiment of the present invention is the same as step C in the above embodiment. After the overflow water volume water_YL of the cyclone is calculated by step C, step G can be omitted and the calculation result of step C can be directly obtained for the calculation of step S140.

[0090] H: Determine the total water addition amount water_Add based on the overflow water volume water_YL of the cyclone;

[0091] It can be understood that according to the balance principle, with the mill, pump pool and classifying cyclone as the circulation body, the mineral and water reach a balanced state in this circulation body. Then, the total water added during the circulation process, water_Add, is equal to the overflow water, water_YL, that is, water_Add = water_YL.

[0092] I: Calculate the pump pool water addition amount water_BC based on the total water addition amount water_Add, the moisture content of the new feed water_XGL and the mill water addition amount water_MJ.

[0093] It should be noted that the total water added in the entire grinding process is equal to the sum of the water added by the raw materials themselves (that is, the moisture content of the new feed) water_XGL, the water added in the mill water_MJ and the water added to the pump pool water_BC. Therefore, the water added to the pump pool water_BC can be calculated according to the fourth relationship water_BC = water_Add - water_XGL - water_MJ.

[0094] S150: Controlling water addition to the mill based on the water addition amount of the mill, and controlling water addition to the pump pool based on the water addition amount of the pump pool.

[0095] Specifically, after obtaining the water addition amount of the mill and the water addition amount of the pump pool, the water addition to the mill can be further controlled according to the water addition amount of the mill, and the water addition to the pump pool can be controlled according to the water addition amount of the pump pool, thereby improving the water addition control efficiency and accuracy of the grinding feed water addition system.

[0096] In addition, it should be noted that in actual applications, the collected data used in the method provided in the embodiment of the present invention all adopt minute average values. Specifically, the control model adjustment period T can be set. T can be 5 minutes or 10 minutes. The specific value can be determined according to actual needs. For example, if T is 10 minutes, then the data used in the implementation method are all average values ​​within 10 minutes, thereby reducing the impact of data fluctuations on the control. In the implementation method, when the circulating load (that is, the return sand ratio) in the grinding and grading balance is updated, when the material type changes, the corresponding circulating load needs to be re-obtained and updated, otherwise it remains unchanged. By adding water to the inside of the mill in the entire process to control the grinding concentration of the mill, and adding water to the pump pool under the mill, the grading inlet concentration is controlled, thereby ensuring the grinding and grading efficiency.

[0097] It can be seen from this that the present invention obtains the new feed wet ore amount, the new feed original moisture content and the mill grinding concentration target value of the mill, obtains the return sand ratio, the overflow concentration of the cyclone and the underflow return sand concentration, and then according to the new feed wet ore amount, the new feed original moisture content, the mill grinding concentration target value, the return sand ratio, the overflow concentration and the underflow return sand concentration, the mill water addition amount of the mill can be further calculated, according to the new feed wet ore amount, the new feed original moisture content, the overflow concentration and the mill water addition amount, the pump pool water addition amount can be further calculated, and then the mill water addition is controlled according to the mill water addition amount, and the pump pool water addition is controlled according to the pump pool water addition amount; the present application comprehensively considers the entire grinding process to automatically calculate the mill water addition amount and the pump pool water addition amount, with high calculation efficiency and accuracy, which is conducive to more accurate control of grinding water addition, and is conducive to improving grinding efficiency and product quality.

[0098] In addition, the water addition control method provided by the present invention can control the mill concentration to improve grinding efficiency. By controlling the amount of water added to the pump sump to ensure the classification inlet concentration and thus the classification particle size requirements, the classification efficiency is improved. In particular, the embodiment of the present invention calculates the amount of water added to the mill and the amount of water added to the pump sump based on the material balance and water balance in the grinding and classification balance to ensure the grinding and classification concentrations, thereby improving and optimizing the grinding and classification efficiency.

[0099] The present invention also provides a corresponding device for the pellet milling water addition control method, which further makes the method more practical. Among them, the device can be described from the perspective of functional modules and hardware. The pellet milling water addition control device provided by the present invention is introduced below. The device is used to implement the pellet milling water addition control method provided by the present invention. In this embodiment, the pellet milling water addition control device may include or be divided into one or more program modules. The one or more program modules are stored in a storage medium and executed by one or more processors to complete the pellet milling water addition control method disclosed in the above embodiment. The program module referred to in the present invention refers to a series of computer program instruction segments that can complete specific functions, which is more suitable for describing the execution process of the pellet milling water addition control device in the storage medium than the program itself. The following description will specifically introduce the functions of each program module of this embodiment. The pellet milling water addition control device described below and the pellet milling water addition control method described above can be referenced to each other.

[0100] From the perspective of functional modules, see Figure 3 , Figure 3 This is a structural diagram of a pellet mill water addition control device provided by the present invention in a specific embodiment. The device is applied to a grinding feed water addition system. The grinding feed water addition system includes a mill, a pump tank, and a cyclone. The device may include:

[0101] The first acquisition module 11 is used to obtain the new feed wet ore amount WI of the millN 、Original moisture content of new feed MI N and the grinding concentration target value DI MJ ;

[0102] The second acquisition module 12 is used to obtain the return sand ratio C and the overflow concentration DI of the cyclone YL and bottom flow return sand concentration DI FS ;

[0103] The first calculation module 13 is used to calculate the amount of wet ore in the new feed based on the WI N 、The original moisture content of the new feed MI N , the grinding concentration target value DI MJ , the sand return ratio C, the overflow concentration DI YL and the bottom flow return sand concentration DI FS , calculate the mill water addition amount water_MJ of the mill;

[0104] The second calculation module 14 is used to calculate the amount of wet ore in the new feed based on the amount of wet ore in the new feed. N 、The original moisture content of the new feed MI N , the overflow concentration DI YL and the water added to the mill water_MJ, and the water added to the pump pool water_BC is calculated;

[0105] The control module 15 is configured to control the water addition to the mill based on the water addition amount of the mill, and to control the water addition to the pump pool based on the water addition amount of the pump pool.

[0106] It should be noted that the pelletizing grinding water addition control device provided in the embodiment of the present invention has the same beneficial effects as the pelletizing grinding water addition control method provided in the above embodiment, and for the specific introduction of the pelletizing grinding water addition control method involved in the embodiment of the present invention, please refer to the above embodiment, and this application will not go into details here.

[0107] The pellet mill water control device mentioned above is described from the perspective of functional modules. Furthermore, the present invention also provides a grinding feed water system, which is described from the perspective of hardware. The grinding feed water system includes a pre-screen, a mill, a pump tank, a cyclone, a memory, and a processor, wherein:

[0108] memory for storing computer programs;

[0109] The processor is used to implement the steps of the pellet grinding water addition control method as described in the above embodiment when executing the computer program.

[0110] The electronic device provided in this embodiment may include but is not limited to a smart phone, a tablet computer, a laptop computer, or a desktop computer.

[0111] Among them, the processor may include one or more processing cores, such as a 4-core processor, an 8-core processor, etc. The processor can be implemented in at least one hardware form of DSP (Digital Signal Processing), FPGA (Field-Programmable Gate Array), and PLA (Programmable Logic Array). The processor may also include a main processor and a coprocessor. The main processor is a processor for processing data in the awake state, also known as CPU (Central Processing Unit); the coprocessor is a low-power processor for processing data in the standby state. In some embodiments, the processor 21 may be integrated with a GPU (Graphics Processing Unit), which is responsible for rendering and drawing the content to be displayed on the display screen. In some embodiments, the processor 21 may also include an AI (Artificial Intelligence) processor, which is used to process computing operations related to machine learning.

[0112] The memory may include one or more computer-readable storage media, which may be non-transitory. The memory may also include high-speed random access memory and non-volatile memory, such as one or more disk storage devices or flash memory devices. In some embodiments, the memory may be an internal storage unit of the electronic device, such as a server's hard drive. In other embodiments, the memory may be an external storage device of the electronic device, such as a plug-in hard drive equipped on a server, a Smart Media Card (SMC), a Secure Digital (SD) card, a flash memory card, etc. Furthermore, the memory may include both an internal storage unit and an external storage device of the electronic device. The memory can be used not only to store application software installed on the electronic device and various types of data, such as the code of programs used to execute the pellet mill water addition control method, but also to temporarily store data that has been output or is about to be output. In this embodiment, the memory is used to store at least the following computer program, which, when loaded and executed by the processor, can implement the relevant steps of the pellet mill water addition control method disclosed in any of the aforementioned embodiments. Furthermore, the resources stored in the memory may also include an operating system and data, and the storage method may be either temporary or permanent. The operating system may include Windows, Unix, Linux, etc. The data may include but is not limited to (data corresponding to pellet grinding water addition control results) and the like.

[0113] It is understandable that if the pellet grinding water addition control method in the above embodiment is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium and executes all or part of the steps of the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), electrically erasable programmable ROM, register, hard disk, removable disk, CD-ROM, magnetic disk or optical disk, and other media that can store program code.

[0114] Based on this, an embodiment of the present invention further provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the steps of the above-mentioned pellet grinding water addition control method are implemented.

[0115] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Reference can be made to the common and similar parts between the various embodiments. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method description.

[0116] It should also be noted that, in this specification, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus comprising the element.

[0117] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for controlling water addition in pellet grinding, characterized in that: Applied to a grinding feed water adding system, the grinding feed water adding system includes a grinding mill, a pump tank, and a cyclone, and the method includes: Obtaining the wet ore amount of the new feed of the mill, the original moisture content of the new feed and the target grinding concentration of the mill; Obtain the sand return ratio, cyclone overflow concentration and underflow sand return concentration; Calculating the mill water addition amount of the mill based on the wet ore amount of the new feed, the original moisture content of the new feed, the target grinding concentration of the mill, the return sand ratio, the overflow concentration and the underflow return sand concentration; Calculating the pump pool water addition amount of the pump pool based on the wet ore amount of the new feed, the original moisture content of the new feed, the overflow concentration and the mill water addition amount; The water addition to the mill is controlled based on the water addition amount of the mill, and the water addition to the pump pool is controlled based on the water addition amount of the pump pool.

2. The pellet grinding water addition control method according to claim 1, characterized in that: The method of calculating the mill water addition amount of the mill based on the wet ore amount of the new feed, the original moisture content of the new feed, the target grinding concentration of the mill, the return sand ratio, the overflow concentration and the underflow return sand concentration includes: Calculating the dry ore content and moisture content of the new feed of the mill based on the wet ore content of the new feed and the original moisture content of the new feed; Determining the amount of dry ore overflowing from the cyclone based on the amount of dry ore in the new feed, and calculating the amount of overflow water from the cyclone based on the overflow concentration and the amount of dry ore overflowing from the cyclone; Calculating the dry ore content of the cyclone return sand and the water content of the cyclone return sand based on the cyclone overflow dry ore content, the return sand ratio and the underflow return sand concentration; Calculating the total dry ore amount entering the mill based on the dry ore amount of the cyclone return sand and the dry ore amount of the new feed; The amount of water added to the mill is calculated based on the target grinding concentration of the mill, the total dry ore content, the moisture content of the new feed, and the moisture content of the cyclone return sand.

3. The pellet grinding water addition control method according to claim 2, characterized in that: The calculation of the water addition amount of the mill based on the target grinding concentration of the mill, the total dry ore content, the moisture content of the new feed, and the moisture content of the cyclone return sand includes: The mill water addition amount is calculated based on the target grinding concentration of the mill, the total dry ore content, the moisture content of the new feed, and the moisture content of the cyclone return sand, in combination with a first calculation formula; wherein the first calculation formula is: water_MJ = (WI MJD *(1 - DI MJ ) / DI MJ )- water_XGL - water_FS; where water_MJ represents the amount of water added to the mill, WI MJD Indicates the total dry ore content, DI MJ It indicates the target value of grinding concentration of the mill, water_XGL indicates the moisture content of the new feed, and water_FS indicates the moisture content of the cyclone return sand.

4. The pellet grinding water addition control method according to claim 2, characterized in that: The calculating of the dry ore amount of the cyclone return sand and the water content of the cyclone return sand based on the cyclone overflow dry ore amount, the return sand ratio and the underflow return sand concentration includes: Calculating the amount of dry ore returned from the cyclone based on the amount of dry ore overflowed from the cyclone and the return sand ratio; The moisture content of the cyclone return sand is calculated based on the dry ore content of the cyclone return sand and the underflow return sand concentration.

5. The pellet grinding water addition control method according to claim 4, characterized in that: The calculating of the amount of dry ore returned from the cyclone based on the amount of dry ore overflowed from the cyclone and the return sand ratio includes: Multiplying the cyclone overflow dry ore amount and the return sand ratio to obtain the cyclone return sand dry ore amount; Then, the calculation of the moisture content of the cyclone return sand based on the dry ore amount of the cyclone return sand and the underflow return sand concentration includes: Based on the dry ore content of the cyclone return sand and the underflow return sand concentration, the moisture content of the cyclone return sand is calculated in combination with the second calculation formula, wherein the second calculation formula is: water_FS = WI FSD * (1 - DI FS ) / DI FS ; Among them, water_FS represents the water content of the cyclone return sand, WI FSD Indicates the amount of dry ore returned from the cyclone, DI FS Indicates the bottom flow return sand concentration.

6. The pellet grinding water addition control method according to claim 1, characterized in that: The pump pool water addition amount is calculated based on the wet ore amount of the new feed, the original moisture content of the new feed, the overflow concentration and the mill water addition amount, including: Calculating the dry ore content and moisture content of the new feed of the mill based on the wet ore content of the new feed and the original moisture content of the new feed; Determining the amount of dry ore overflowing from the cyclone based on the amount of dry ore in the new feed, and calculating the amount of overflow water from the cyclone based on the overflow concentration and the amount of dry ore overflowing from the cyclone; Determining the total amount of water added based on the overflow water volume of the cyclone; The pump pool water addition amount is calculated based on the total water addition amount, the moisture content of the new feed and the mill water addition amount.

7. The pellet grinding water addition control method according to claim 2 or 6, characterized in that: The method of calculating the overflow water volume of the cyclone based on the overflow concentration and the overflow dry ore volume of the cyclone comprises: Based on the overflow concentration and the cyclone overflow dry ore volume, combined with a third calculation formula, the cyclone overflow water volume is calculated; wherein the third calculation formula is: water_YL = WI YLD * (1 - DI YL ) / DI YL ; Among them, water_YL represents the overflow water volume of the cyclone, WI YLD Indicates the amount of dry ore overflowing from the cyclone, DI YL Indicates overflow concentration.

8. A pellet grinding water control device, characterized in that: Applicable to the grinding feed water adding system, the grinding feed water adding system includes a grinding mill, a pump tank, and a cyclone. The device includes: The first acquisition module is used to obtain the amount of wet ore of the new feed of the mill, the original moisture content of the new feed and the target value of the grinding concentration of the mill; The second acquisition module is used to obtain the sand return ratio, the overflow concentration of the cyclone and the underflow sand return concentration; a first calculation module, configured to calculate a mill water addition amount of the mill based on the wet ore amount of the new feed, the original moisture content of the new feed, the target grinding concentration of the mill, the return sand ratio, the overflow concentration, and the underflow return sand concentration; A second calculation module is configured to calculate the pump pool water addition amount based on the new feed wet ore amount, the new feed original moisture content, the overflow concentration and the mill water addition amount; A control module is used to control the water addition to the mill based on the water addition amount of the mill, and to control the water addition to the pump pool based on the water addition amount of the pump pool.

9. A grinding feed water adding system, characterized in that: It includes a mill, a pump sump, a cyclone, a storage device and a processor, wherein: The memory is used to store computer programs; The processor is configured to implement the steps of the method for calculating the amount of water added to pellet grinding as claimed in any one of claims 1 to 7 when executing the computer program.

10. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the method for calculating the amount of water added to pellet grinding according to any one of claims 1 to 7 are implemented.

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