Autonomous regulation system for coal slime flotation process control based on multivariable coupling technology

Abstract

The invention provides a coal slime flotation process control autonomous adjusting system based on a multivariable coupling technology, and belongs to the field of mineral flotation. The coal slime flotation process control autonomous adjusting system based on the multivariable coupling technology comprises a feeding property detection module, a control module and a control module, wherein the feeding property detection module is used for detecting floating ore pulp flow and floating ore pulp solid concentration; the flotation equipment parameter measurement and control module is used for detecting and controlling parameters of flotation equipment; the product quality detection module is used for detecting flotation concentrate and flotation tailings; the reagent adding control module is used for detecting the flow of the flotation reagent and the proportion of the flotation reagent to the emulsified clear water; the control module is used for sending control parameters to the flotation equipment parameter measurement and control module according to the information sent by the flotation equipment parameter measurement and control module; the feeding property detection module, the flotation equipment parameter measurement and control module, the product quality detection module and the agent adding control module are all connected with the control module. The accuracy and reliability of clean coal flotation can be improved.

Description

Technical Field

[0001] The present disclosure relates to the field of mineral flotation, and in particular to an autonomous regulating system for controlling a coal slime flotation process based on a multivariable coupling technology. Background Art

[0002] The principle of fine coal slime flotation is a method of mineral separation that utilizes the difference in physical and chemical properties of fine coal and non-combustible gangue in coal slime water to separate minerals. After raw coal enters the coal preparation plant, it undergoes block coal gangue removal, fine coal separation, and coal slime classification, and then fine coal slime enters the coal slime flotation process, where it is separated by flotation equipment. The purpose of fine coal slime flotation is to float out the combustible clean coal dispersed in the coal slime slurry, to ensure that the combustible body carries as little non-combustible gangue as possible during the floating process, and that the discharged flotation tailings carry as little useful clean coal particles as possible. This requires that the ash content of the flotation clean coal is qualified and the ash content of the flotation tailings is high by detecting and adjusting multiple parameters of the flotation process.

[0003] The current coal slime flotation process usually uses fixed parameters to float the coal slime, resulting in a low flotation rate. Summary of the invention

[0004] The disclosed embodiment provides an autonomous regulating system for controlling a coal slime flotation process based on a multivariable coupling technology to solve the problems of poor results and low flotation rate of conventional coal slime flotation.

[0005] The disclosed embodiment provides an autonomous regulating system for controlling a coal slime flotation process based on a multivariable coupling technology, comprising: a feed property detection module for detecting a flow rate of an inlet flotation slurry and a solid concentration of an inlet flotation slurry; Flotation equipment parameter measurement and control module, used to detect and control the parameters of the flotation equipment; Product quality inspection module, used to inspect flotation concentrate and flotation tailings; The reagent addition control module is used to detect the flow rate of the flotation reagent and the ratio of the flotation reagent to the emulsified water; A control module, used for sending control parameters to the flotation equipment parameter measurement and control module according to information sent by the flotation equipment parameter measurement and control module; The feed property detection module, the flotation equipment parameter measurement and control module, the product quality detection module and the reagent addition control module are all connected to the control module.

[0006] In an exemplary embodiment of the present disclosure, the feed property detection module includes: a flotation feed slurry flow rate detector and a flotation feed slurry solid concentration detector; Flotation slurry flow detector is used to detect the flow of flotation slurry; Flotation slurry solid concentration detector, used to detect the solid concentration of flotation slurry; The flotation slurry flow rate detector and the flotation slurry solid concentration detector are both connected to the control module.

[0007] In an exemplary embodiment of the present disclosure, a flotation equipment parameter measurement and control module includes: an aeration volume measurement and control unit, a slurry level and foam layer limit detection unit, and a tailings gate position measurement and control unit; Inflation volume measurement and control unit, used to detect and control the inflation volume; The slurry level and foam layer limit detection unit is used to detect the slurry level and the position of the foam layer; Tailings gate position measurement and control unit, used to detect the position of the tailings gate and control the opening of the tailings gate; The inflation volume measurement and control unit, the slurry level and foam layer limit detection unit and the tailings gate position measurement and control unit are all connected to the control module.

[0008] In an exemplary embodiment of the present disclosure, the product quality detection module includes: a flotation concentrate ash detection unit and a flotation tailings ash detection unit; Flotation concentrate ash detection unit, used to detect the ash content of flotation concentrate; Flotation tailings ash detection unit, used to detect the ash content of flotation tailings; The flotation concentrate ash detection unit and the flotation tailings ash detection unit are both connected to the control module.

[0009] In an exemplary embodiment of the present disclosure, the reagent addition control module is also used to control the flow rate of the flotation reagent and the ratio of the flotation reagent to the emulsified clean water; A medicine adding control module, including: a medicine buffer and conveying unit, a medicine flow detection unit, a medicine emulsification unit and an impurity filtering unit; A reagent buffer and delivery unit, used for buffering and delivering flotation reagents; A reagent flow detection unit, used to detect the flow of flotation reagent; Reagent emulsification unit, used to control the ratio of flotation reagent and emulsified water; Impurity filtration unit is used to remove impurities from flotation reagents and emulsified water.

[0010] In an exemplary embodiment of the present disclosure, the coal slime flotation process control autonomous regulation system based on multivariable coupling technology further includes: a raw coal slime detection module; Raw coal slime detection module, used to detect the particle size composition and mineral composition of raw coal slime; The raw coal slime detection module is connected with the control module.

[0011] In an exemplary embodiment of the present disclosure, the control module is specifically configured to send control parameters to the flotation device parameter measurement and control module based on the multivariable coupling model and information sent by the flotation device parameter measurement and control module.

[0012] In an exemplary embodiment of the present disclosure, the multivariate coupling model is a model trained based on the parameters of historical flotation equipment and the properties of the incoming flotation slurry.

[0013] In an exemplary embodiment of the present disclosure, the control module is further configured to, in response to the ratio of the first particles to the second particles of the raw coal slime being greater than a first particle size threshold, increase the coupling coefficient between the aeration volume and the flow rate of the flotation slurry with a first particle size step size, and increase the coupling coefficient between the flow rate of the flotation reagent and the slurry level with a second particle size step size; In response to the ratio of the first particles to the second particles of the raw coal slime being less than the second particle size threshold, reducing the coupling coefficient between the aeration volume and the flow rate of the flotation slurry with a third particle size step, and reducing the coupling coefficient between the flow rate of the flotation reagent and the slurry level with a fourth particle size step; The diameter of the first particles is greater than the diameter of the second particles.

[0014] In an exemplary embodiment of the present disclosure, the control module is further configured to increase the coupling coefficient between the aeration volume and the slurry level with a first component step length in response to the raw coal slime satisfying the first condition; In response to the raw coal slime satisfying the second condition, the coupling coefficient between the aeration volume and the slurry level is reduced with a second component step size.

[0015] The beneficial effects of the coal slime flotation process control autonomous adjustment system based on multivariable coupling technology provided by the embodiment of the present disclosure are: The present disclosure can accurately detect the flow rate and solid concentration of the flotation pulp in real time through the feed property detection module, providing accurate raw material data support for the subsequent flotation process. The flotation equipment parameter measurement and control module is responsible for detecting and controlling various parameters of the flotation equipment, such as stirring speed, bubble size, etc., so as to ensure that the flotation process is carried out in the best state. The present disclosure can monitor the flow rate of the flotation reagent and the ratio of the reagent to the emulsified water in real time through the reagent addition control module, so as to achieve accurate control of the use of the reagent. This can not only avoid the waste of reagents, but also improve the utilization rate of the reagents, thereby improving the flotation effect. The present disclosure detects the concentrate and tailings after flotation through the product quality detection module, which can timely discover product quality problems, thereby realizing timely adjustment of the flotation process. The present disclosure uses the control module as the core of the entire system, and can send control parameters to each module according to the information sent by the flotation equipment parameter measurement and control module, so as to realize the autonomous adjustment of the system. This automatic adjustment function can greatly improve the stability and reliability of the flotation process, reduce manual intervention, and reduce operating costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 It is a structural schematic diagram of an autonomous regulating system for controlling a coal slime flotation process based on a multivariable coupling technology provided by an embodiment of the present disclosure; Figure 2 It is a structural schematic diagram of a second coal slime flotation process control autonomous regulation system based on multivariable coupling technology provided by an embodiment of the present disclosure; Figure 3 It is a structural schematic diagram of a third coal slime flotation process control autonomous adjustment system based on multivariable coupling technology provided by an embodiment of the present disclosure; Figure 4 It is a schematic diagram of the structure of a slurry level and foam layer limit detection unit provided in an embodiment of the present disclosure; Figure 5 It is a structural schematic diagram of a tailings gate position measurement and control unit provided in an embodiment of the present disclosure; Figure 6 is a schematic structural diagram of a flotation concentrate ash detection unit provided in an embodiment of the present disclosure; Figure 7 is a schematic structural diagram of a flotation tailings ash detection unit provided in an embodiment of the present disclosure; Figure 8 is a schematic diagram of the structure of a control cabinet provided in an embodiment of the present disclosure; Fig. 9 It is a structural diagram of the drug addition control module provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0018] In order to enable people in the technical field to better understand the present solution, the technical solution in the embodiment of the present solution will be clearly described below in conjunction with the drawings in the embodiment of the present solution. Obviously, the described embodiment is an embodiment of a part of the present solution, not all of the embodiments. Based on the embodiments in the present solution, all other embodiments obtained by ordinary technicians in the field without creative work should fall within the scope of protection of the present solution.

[0019] The term "including" and any other variations in the specification and claims of this solution and the above drawings mean "including but not limited to", and is intended to cover non-exclusive inclusions and is not limited to the examples listed in the text. In addition, the terms "first" and "second" are used to distinguish different objects, not to describe a specific order.

[0020] The following is a detailed description of the implementation of the present disclosure in conjunction with the specific drawings: Figure 1 A schematic diagram of the structure of an autonomous control system for coal slime flotation process control based on multivariable coupling technology provided by an embodiment of the present disclosure. Figure 1 , the coal slime flotation process control autonomous regulation system based on multivariable coupling technology includes: a feed property detection module 20, which is used to detect the flow rate of the flotation slurry and the solid concentration of the flotation slurry; A flotation equipment parameter measurement and control module 21, used to detect and control the parameters of the flotation equipment; Product quality detection module 22, used for detecting flotation concentrate and flotation tailings; The reagent adding control module 12 is used to detect the flow rate of the flotation reagent and the ratio of the flotation reagent to the emulsified water; The control module 24 is used to send control parameters to the flotation equipment parameter measurement and control module 21 according to the information sent by the flotation equipment parameter measurement and control module 21; The feed property detection module 20 , the flotation equipment parameter measurement and control module 21 , the product quality detection module 22 and the reagent addition control module 12 are all connected to the control module 24 .

[0021] In this embodiment, the feed property detection module 20 can detect the flow rate of the ore pulp entering the flotation process and the concentration of solid matter in the ore pulp. The flow rate and solid concentration of the ore pulp entering the flotation process are important basic parameters that affect the flotation process, and will affect the subsequent reagent addition amount, the setting of the flotation equipment operating parameters, etc. For example, if the flow rate of the ore pulp entering the flotation increases, the amount of reagent addition needs to be increased accordingly to ensure the flotation effect; changes in the solid concentration of the ore pulp will affect the difficulty of flotation and the output quality of concentrates and tailings.

[0022] The flotation equipment parameter measurement and control module 21 can detect and accurately control the key parameters in the operation process of the flotation equipment in real time. These parameters may include: aeration volume, slurry level, foam layer position, tailings gate position, etc. For example, the size of the aeration volume will affect the number and size of bubbles generated, and thus affect the adhesion effect of coal particles and bubbles; the slurry level and foam layer position are related to the flotation time and the collection efficiency of the concentrate foam; the tailings gate position controls the discharge rate of the tailings and the residence time of the slurry in the flotation machine, which has an important impact on the quality of the concentrate and tailings.

[0023] The product quality detection module 22 can perform quality detection on the concentrate and tailings products finally obtained by flotation, with a focus on the ash content. By detecting the ash content of the concentrate, it can be determined whether the concentrate product meets the quality requirements. If the ash content is too high, it may mean that too many impurities are mixed into the concentrate, and the flotation process parameters need to be adjusted; by detecting the ash content of the tailings, the loss of useful minerals in the tailings can be understood. If the ash content of the tailings is too low, it may be that the concentrate is not fully recovered during the flotation process, and the system also needs to be optimized.

[0024] The reagent addition control module 12 can detect the flow rate of the flotation reagent to ensure the accuracy of the reagent addition; on the other hand, it can control the ratio of the flotation reagent to the emulsified water. The appropriate ratio of reagent to emulsified water is crucial to the emulsification effect and function of the reagent. For example, different types of coal and flotation conditions may require different ratios of reagent emulsions, which can be precisely adjusted through this module to improve the selective capture ability of the reagent on coal particles, while reducing the amount of reagent and reducing costs.

[0025] The control module 24 can send control parameters to the flotation equipment parameter measurement and control module 21 according to various real-time information sent by the flotation equipment parameter measurement and control module 21, such as the current aeration volume, slurry level and other parameter values, combined with the preset control strategy and algorithm, so as to achieve dynamic adjustment of the flotation equipment operating parameters. It also receives information from the feed property detection module 20, the product quality detection module 22 and the reagent addition control module 12, comprehensively considers various factors, coordinates the work between the modules, and makes the entire flotation process in the best state.

[0026] The preset control strategy and algorithm may be implemented by a multivariable coupling model, and the multivariable coupling model may be a neural network model trained based on historical actual data and experiments.

[0027] For example, the feed property detection module 20 monitors the incoming flotation slurry in real time. It is detected that the flow rate of the incoming flotation slurry is 100 cubic meters per hour and the solid concentration is 20%. These data are transmitted to the control module 24. The control module 24 preliminarily determines a basic flotation equipment parameter and a setting range of the reagent addition amount based on the feed property data and the pre-set program. For example, according to the empirical formula, it is calculated that the initial setting value of the aeration volume that is roughly appropriate at this time is 5 cubic meters per minute, and the reagent addition amount is preliminarily set to 50 liters per minute (the ratio of the reagent to the emulsified water is tentatively set to 1:4). The aeration volume measurement and control unit 210 in the flotation equipment parameter measurement and control module 21 feeds back the actual aeration volume to the control module 24, assuming that the initial aeration volume is 4.5 cubic meters per minute, which is slightly lower than the set value. The slurry level and foam layer limit detection unit 5 detects that the slurry level is in the normal range, but the foam layer thickness is slightly thin. The tailings gate position measurement and control unit 8 shows that the tailings gate opening is normal.

[0028] After a period of flotation, the product quality detection module 22 detects that the ash content of the flotation concentrate is slightly higher than the target value (the target value is 10%, the actual detection is 12%), and the ash content of the flotation tailings is slightly lower than the target value (the target value is 50%, the actual detection is 45%). After receiving the above information, the control module 24 performs analysis and calculation according to the built-in multivariable coupling model. Due to the high ash content of the concentrate and the low ash content of the tailings, it is judged that the flotation selectivity is poor due to insufficient aeration, and the amount of reagent added needs to be adjusted. At this time, the control module 24 sends an instruction to the flotation equipment parameter measurement and control module 21 to increase the opening of the aeration volume regulating valve, so that the aeration volume is gradually increased to 5.5 cubic meters / minute; at the same time, an instruction is sent to the reagent addition control module 12 to reduce the proportion of the collector in the reagent (adjust the ratio of the reagent to the emulsified water to 1:4.5), and reduce the amount of reagent added to 48 liters / minute.

[0029] It can be concluded from the above that the present disclosure can accurately detect the flow rate and solid concentration of the flotation slurry in real time through the feed property detection module 20, providing accurate raw material data support for the subsequent flotation process. The flotation equipment parameter measurement and control module 21 is responsible for detecting and controlling various parameters of the flotation equipment, such as stirring speed, bubble size, etc., so as to ensure that the flotation process is carried out in the best state. The present disclosure can monitor the flow rate of the flotation reagent and the ratio of the reagent to the emulsified water in real time through the reagent addition control module 12, so as to achieve accurate control of the use of the reagent. This can not only avoid the waste of reagents, but also improve the utilization rate of the reagents, thereby improving the flotation effect. The present disclosure detects the concentrate and tailings after flotation through the product quality detection module 22, which can timely discover product quality problems, thereby realizing timely adjustment of the flotation process. The present disclosure uses the control module 24 as the core of the entire system, which can send control parameters to each module according to the information sent by the flotation equipment parameter measurement and control module 21, so as to realize the autonomous adjustment of the system. This automatic adjustment function can greatly improve the stability and reliability of the flotation process, reduce manual intervention, and reduce operating costs.

[0030] Figure 2 is a structural schematic diagram of a second coal slime flotation process control autonomous regulation system based on multivariable coupling technology provided by an embodiment of the present disclosure; Figure 2 In one embodiment of the present disclosure, the feed property detection module 20 includes: a flotation feed slurry flow detector 1 and a flotation feed slurry solid concentration detector 2; Flotation slurry flow detector 1, used to detect the flow of flotation slurry; Flotation slurry solid concentration detector 2, used to detect the solid concentration of the flotation slurry; The flotation slurry flow detector 1 and the flotation slurry solid concentration detector 2 are both connected to the control module 24 .

[0031] In this embodiment, the flotation slurry flow detector 1 is used to measure the volume flow of slurry entering the flotation process per unit time. By real-time detection of the slurry flow, the present invention can adjust the amount of reagent addition, the operating parameters of the flotation equipment, etc. according to the flow rate to adapt to different processing volume requirements and ensure the stability of the flotation effect.

[0032] The solid concentration detector 2 of the flotation slurry is used to measure the mass percentage concentration of solid particles in the flotation slurry. The solid concentration will affect the effect of the flotation reagent, the processing capacity of the flotation equipment, and the quality of the concentrate and tailings. If the solid concentration is too high, it may be necessary to increase the reagent dosage or adjust the flotation equipment parameters to ensure the quality and recovery rate of the concentrate.

[0033] For example, after receiving the data that the flow rate of the flotation slurry is 80 cubic meters per hour and the solid concentration is 25%, the control module 24 calculates the appropriate reagent addition amount, the aeration amount of the flotation equipment, the slurry level setting value and other parameters according to the pre-set program and algorithm, and sends these control instructions to the corresponding modules. For example, it is calculated that 30 liters per hour of collector and 10 liters per hour of frother should be added, the aeration amount should be set to 6 cubic meters per minute, and the slurry level should be adjusted to a specific height, so that the flotation process can run in the best state.

[0034] It can be concluded from the above that the present disclosure detects the pulp flow rate in real time through the flotation pulp flow detector 1, so that the present disclosure can quickly respond to flow changes, adjust the amount of reagent addition and the flotation equipment operating parameters, and ensure that the system can adapt to different processing volume requirements and avoid unstable flotation effects caused by flow fluctuations. The present disclosure detects the pulp flow rate and solid concentration in real time, so that the amount of reagent addition can be accurately adjusted according to actual conditions. This can not only avoid excessive use of reagents and reduce waste, but also ensure that the reagents are maximized at the optimal concentration, thereby improving flotation efficiency and product quality. The flotation equipment parameters (such as aeration volume, pulp level, etc.) are adjusted according to the real-time detected pulp flow rate and solid concentration, which helps to optimize the processing capacity of the flotation equipment. This can not only improve the operating efficiency of the equipment, but also extend the service life of the equipment and reduce maintenance costs.

[0035] Figure 2 is a structural schematic diagram of a second coal slime flotation process control autonomous regulation system based on multivariable coupling technology provided by an embodiment of the present disclosure; Figure 2 .

[0036] In one embodiment of the present disclosure, the flotation equipment parameter measurement and control module 21 includes: an aeration volume measurement and control unit 210, a slurry level and foam layer limit detection unit 5, and a tailings gate position measurement and control unit 8; The inflation volume measurement and control unit 210 is used to detect and control the inflation volume; The slurry level and foam layer limit detection unit 5 is used to detect the slurry level and the position of the foam layer; The tailings gate position measurement and control unit 8 is used to detect the position of the tailings gate and control the opening of the tailings gate; The inflation volume measurement and control unit 210 , the slurry level and foam layer limit detection unit 5 and the tailings gate position measurement and control unit 8 are all connected to the control module 24 .

[0037] In this embodiment, the gas volume measurement and control unit 210 can accurately detect and effectively control the gas flow rate of the ore pulp in the flotation equipment. The gas volume is one of the key factors affecting the flotation effect. The appropriate gas volume can generate bubbles of appropriate amount and size, so that the coal particles can better adhere to the bubbles and float to form a concentrate foam layer, while avoiding low flotation efficiency and product quality problems caused by excessive or insufficient gas volume.

[0038] The slurry level and foam layer limit detection unit 5 can monitor the height of the slurry level in the flotation equipment and the position information of the foam layer in real time. The height of the slurry level will affect the residence time of the slurry in the flotation machine, and thus affect the flotation effect; the detection of the foam layer position helps to control the overflow and collection of foam and ensure the effective recovery of the concentrate. Through the accurate detection of these two parameters, the system can timely adjust other parameters such as the tailings gate position and the inflation volume to maintain the stability of the flotation process.

[0039] The tailings gate position measurement and control unit 8 can accurately detect the current position height of the tailings gate, and can accurately control the opening of the tailings gate according to the instructions of the control module 24. The position and opening of the tailings gate directly determine the discharge speed of the tailings and the liquid level of the slurry in the flotation machine, which in turn affects the flotation time and the separation effect of the concentrate and tailings. Reasonable control of the tailings gate position can optimize the flotation process and improve the concentrate recovery rate and product quality.

[0040] For example, after the control module 24 receives the aeration data fed back by the aeration measurement and control unit 210, the liquid level and foam layer position data of the slurry level and foam layer limit detection unit 5, and the gate position data of the tailing gate position measurement and control unit 8, the control module 24 calculates the best control parameters according to the preset optimization model and process requirements. For example, if the slurry level is too high and the aeration volume is slightly large (greater than the preset liquid level height threshold and aeration volume threshold), the control module 24 will issue an instruction to reduce the aeration volume and appropriately increase the tailing gate opening, and at the same time adjust the amount of reagent added according to the coupling relationship, so that the flotation process is always in the optimal state, and the production efficiency and economic benefits of the coal preparation plant are improved.

[0041] It can be concluded from the above that the present invention can generate bubbles of appropriate amount and size by accurately controlling the amount of aeration, so that the coal particles can better adhere to the bubbles and float up to form a concentrate foam layer. This avoids low flotation efficiency and product quality problems caused by excessive or insufficient aeration, thereby improving the efficiency of flotation and the quality of concentrate. The present invention can ensure that the residence time of the slurry in the flotation machine is moderate by timely adjusting parameters such as the tailings gate position and the amount of aeration, thereby avoiding foam overflow or insufficient collection, thereby ensuring the effective recovery of the concentrate.

[0042] Figure 2 is a structural schematic diagram of a second coal slime flotation process control autonomous regulation system based on multivariable coupling technology provided by an embodiment of the present disclosure; Figure 2 .

[0043] In one embodiment of the present disclosure, the product quality detection module 22 includes: a flotation concentrate ash detection unit 9 and a flotation tailings ash detection unit 10; A flotation concentrate ash content detection unit 9, used to detect the ash content of the flotation concentrate; A flotation tailings ash content detection unit 10, used to detect the ash content of the flotation tailings; The flotation concentrate ash detection unit 9 and the flotation tailings ash detection unit 10 are both connected to the control module 24 .

[0044] In this embodiment, the flotation concentrate ash detection unit 9 can measure the ash content in the flotation concentrate. Ash refers to the content of impurities such as non-combustible minerals in coal. The ash content of the concentrate directly reflects the quality of the concentrate product. By real-time monitoring of the ash content of the concentrate, possible problems in the flotation process, such as improper addition of reagents, inappropriate flotation conditions, etc., can be discovered in time, thereby providing a basis for adjusting the flotation process parameters and ensuring the quality stability of the concentrate product.

[0045] The flotation tailings ash detection unit 10 can accurately detect the ash content in the flotation tailings. The detection of tailings ash is crucial to evaluating the efficiency of the flotation process and the resource recovery. A higher tailings ash content means that more useful minerals are recovered in the concentrate, and the flotation effect is better; on the contrary, if the tailings ash content is too low, there may be problems such as low concentrate recovery rate and loss of useful minerals with the tailings. The flotation process needs to be optimized, such as adjusting the reagent system, aeration volume, tailings gate position, etc.

[0046] For example, when the control module 24 receives the concentrate ash data fed back by the flotation concentrate ash detection unit 9 and the tailings ash data of the flotation tailings ash detection unit 10, it is analyzed in combination with the information of other modules. Specifically, if the concentrate ash content is close to the upper limit for many consecutive times (such as the target upper limit is 10%, and the actual detection is about 9.5% for many times), and the tailings ash content is slightly lower than the target value (such as the target is 50%, and the actual is 48%), the control module 24 may determine that the amount of reagent added is slightly too much or the amount of inflation is too large, so it sends an instruction to the reagent addition control module 12 to reduce the amount of reagent added, and sends an instruction to the flotation equipment parameter measurement and control module 21 to fine-tune the inflation amount to ensure that the concentrate ash content is stable within the qualified range and improve the concentrate recovery rate at the same time.

[0047] It can be concluded from the above that the present disclosure can accurately measure the ash content in the flotation concentrate through the flotation concentrate ash detection unit 9, which directly reflects the quality of the concentrate product. Through real-time monitoring, ash abnormalities can be discovered in time, providing an important basis for quality control in the production process, ensuring that the quality of the final product meets the specified standards and meets market demand. The flotation tailings ash detection unit 10 accurately detects the ash content of the tailings, providing key data for evaluating the efficiency of the flotation process and resource recovery.

[0048] Figure 2 is a structural schematic diagram of a second coal slime flotation process control autonomous regulation system based on multivariable coupling technology provided by an embodiment of the present disclosure; Figure 2 .

[0049] In one embodiment of the present disclosure, the reagent addition control module 12 is also used to control the flow rate of the flotation reagent and the ratio of the flotation reagent to the emulsified clean water; The medicine adding control module 12 includes: a medicine buffer and conveying unit 200, a medicine flow detection unit 201, a medicine emulsification unit 202 and an impurity filtering unit 203; The reagent buffering and conveying unit 200 is used for buffering and conveying the flotation reagent; The reagent flow detection unit 201 is used to detect the flow of the flotation reagent; The reagent emulsification unit 202 is used to control the ratio of the flotation reagent and the emulsified water; The impurity filtering unit 203 is used to remove impurities in the flotation reagent and the emulsified clean water.

[0050] In this embodiment, the reagent addition control module 12 can control the amount of flotation reagent added and adjust the ratio of reagent to emulsified water. It is also responsible for the cache and transportation of reagents and the quality of reagents and emulsified water, which is an important link affecting the flotation effect and cost control. According to the real-time needs of the flotation process, under the instruction of the control module 24, the reagent addition control module 12 accurately provides the flotation system with appropriate reagents to ensure the efficient and stable flotation process.

[0051] The reagent buffer and delivery unit 200 can store a certain amount of flotation reagent to ensure a continuous and stable supply of reagents during the flotation process to avoid affecting the flotation effect due to interruption of reagent supply. At the same time, it is responsible for delivering the buffered reagents to the flotation equipment as required, and its delivery speed and flow rate need to be accurately controlled according to the flotation process parameters and real-time requirements.

[0052] The reagent flow detection unit 201 can monitor the flow rate of the flotation reagent in real time during the transportation process, and the detection result is fed back to the control module 24 in units of volume flow (such as liters / minute) or mass flow (such as kilograms / minute). Accurate reagent flow detection is the basis for achieving accurate reagent addition. By comparing with the set target flow, the control module 24 can adjust the reagent addition amount in time to ensure the stability and consistency of the flotation effect.

[0053] The reagent emulsification unit 202 can control the mixing ratio of the flotation reagent and the emulsified water, and fully mix the two to form a stable emulsion through a specific emulsification process. The appropriate reagent and emulsified water ratio is of great significance for improving the dispersibility of the reagent, enhancing the effect of the reagent on the coal slime particles, and reducing the dosage of the reagent, thereby optimizing the flotation process and improving the concentrate quality and recovery rate.

[0054] The impurity filter unit 203 can remove impurity particles in the flotation reagent and emulsified water, preventing impurities from entering the flotation system and affecting the reagent performance, blocking the delivery pipeline and equipment, and adversely affecting the flotation process. The impurity filter unit 203 ensures the purity of the reagent and emulsified water, ensures that the flotation reagent can function normally, and improves the operating reliability and service life of the flotation equipment.

[0055] For example, if the slurry concentration increases, the control module 24 calculates the need to increase the amount of reagent added according to the preset algorithm, and sends instructions to the reagent cache and delivery unit 200 in the reagent addition control module 12 to increase the speed of the reagent delivery pump and increase the reagent flow rate; at the same time, it sends instructions to the reagent emulsification unit 202 to fine-tune the ratio of the reagent to emulsified water to adapt to the new slurry conditions and ensure that the flotation effect reaches the best state.

[0056] It can be concluded from the above that the present disclosure monitors the flow of flotation reagents in real time through the reagent addition control module 12 to ensure that the amount of reagent addition can accurately match the needs of the flotation process, which not only avoids the waste of reagents, but also improves the flotation efficiency, so that the quality and recovery rate of the concentrate can be optimized. The reagent emulsification unit 202 can flexibly adjust the ratio of flotation reagents to emulsified water according to changes in the pulp conditions. This adjustment capability enables the reagents to be better dispersed in the pulp and enhance the interaction with the coal slime particles, thereby improving the flotation effect and reducing the amount of reagents used. The impurity filtration unit 203 effectively removes impurities in the flotation reagents and emulsified water, preventing the negative impact of impurities on the flotation system. This not only ensures the performance of the reagents, but also extends the service life of the flotation equipment and reduces the downtime caused by equipment failure.

[0057] Figure 2 is a structural schematic diagram of a second coal slime flotation process control autonomous regulation system based on multivariable coupling technology provided by an embodiment of the present disclosure; Figure 2 .

[0058] In one embodiment of the present disclosure, the coal slime flotation process control autonomous regulation system based on multivariable coupling technology further includes: a raw coal slime detection module 23; A raw coal slime detection module 23 is used to detect the particle size composition and mineral composition of the raw coal slime; The raw coal slime detection module 23 is connected to the control module 24 .

[0059] In one embodiment of the present disclosure, the control module 24 is specifically configured to send control parameters to the flotation device parameter measurement and control module 21 based on the multivariable coupling model and information sent by the flotation device parameter measurement and control module 21 .

[0060] In one embodiment of the present disclosure, the multivariable coupling model is a model trained based on the parameters of historical flotation equipment and the properties of the incoming flotation slurry.

[0061] In one embodiment of the present disclosure, the control module 24 is further configured to, in response to the ratio of the first particles to the second particles of the raw coal slime being greater than the first particle size threshold, increase the coupling coefficient between the aeration volume and the flow rate of the flotation slurry with a first particle size step, and increase the coupling coefficient between the flow rate of the flotation reagent and the slurry level with a second particle size step; In response to the ratio of the first particles to the second particles of the raw coal slime being less than the second particle size threshold, reducing the coupling coefficient between the aeration volume and the flow rate of the flotation slurry with a third particle size step, and reducing the coupling coefficient between the flow rate of the flotation reagent and the slurry level with a fourth particle size step; The diameter of the first particles is greater than the diameter of the second particles.

[0062] In this embodiment, the raw coal slime detection module 23 can detect and analyze the particle size composition (i.e., the distribution of particles of different sizes) and mineral composition (including the types and contents of various minerals) of the raw coal slime. The particle size composition and mineral composition of the raw coal have a significant impact on the flotation process. For example, the particle size will affect the ease of adhesion between coal particles and bubbles, and the mineral composition will affect the surface properties of coal particles and the effect of flotation agents. Through the detection of this module, important basic data can be provided for the precise control of the entire flotation process.

[0063] The multivariable coupling model is a mathematical model trained based on a large amount of historical data. The data sources include various operating parameters of past flotation equipment (such as aeration volume, slurry level, tailings gate position, etc.) and the properties of the flotation slurry (such as concentration, particle size composition, mineral composition, etc.). The model establishes a complex correlation (coupling relationship) between the variables through analysis and learning of the above data. It can predict the flotation results under different parameter combinations based on the input real-time data, provide decision-making basis for the control module 24, and thus realize accurate control of the flotation process.

[0064] For example, in the long-term operation of the coal preparation plant, a large amount of flotation data has been accumulated, such as the corresponding concentrate ash, tailings ash and concentrate recovery rate under different slurry concentrations (10%-30%), different aeration volumes (3-8 cubic meters / minute), different slurry levels (0.5-1.5 meters), etc., and the particle size composition and mineral composition of the flotation slurry are recorded at the same time. These data are trained using machine learning algorithms (such as neural network algorithms) to establish a multivariable coupling model. When a new flotation task begins, the current flotation slurry properties and initial parameters of the flotation equipment are input, and the model can predict the flotation effect under different control strategies, helping the control module 24 to select the best control parameter combination.

[0065] In this embodiment, the first particle may be a coal particle having a diameter greater than or equal to the first diameter, and the second particle may be a coal particle having a diameter less than the first diameter. The diameter of the particle may be detected by laser particle size analysis or image analysis. The first diameter is determined experimentally.

[0066] The first particle size threshold refers to the maximum threshold of the ratio of the first particle to the second particle. When it exceeds the first particle size threshold, it means that there are more coarse particles in the raw coal. At this time, in order to improve the flotation effect, it is necessary to adjust the coupling relationship between the aeration volume and the flow rate of the flotation slurry, the flow rate of the flotation reagent and the slurry level.

[0067] For example, when the ratio of first particles with a diameter greater than or equal to a first diameter (determined by experiments, for example, the first diameter is 0.5 mm) to second particles with a diameter less than the first diameter in the raw coal slime is greater than the first particle size threshold (assuming that the first particle size threshold is 0.6, that is, the proportion of first particles reaches more than 60%), it means that there are more coarse particles in the raw coal. At this time, in order to improve the flotation effect, it is necessary to adjust the coupling relationship between the aeration volume and the flow rate of the flotation slurry, and the flow rate of the flotation reagent and the slurry level.

[0068] Increasing the coupling coefficient between the aeration volume and the flow rate of the flotation slurry with the first particle size step (assuming it is 0.1) means that when the flow rate of the flotation slurry increases by a certain amount, the aeration volume will increase at a greater rate. For example, if the flow rate of the flotation slurry increases by 10 cubic meters per hour, the original aeration volume may increase by 5 cubic meters per minute, and after adjustment, it may increase by 6 cubic meters per minute (assuming that the original coupling coefficient is 0.5, and after adjustment it becomes 0.6). This can generate more bubbles, so that the coarse particles can better combine with the bubbles, because the coarse particles are relatively heavy and require stronger buoyancy.

[0069] At the same time, the coupling coefficient between the flow rate of the flotation reagent and the slurry level is increased with the second particle size step (assuming it is 0.05). For example, when the slurry level rises by 0.1 meters, the original reagent flow rate increases by 5 liters / minute, and after adjustment it increases by 5.25 liters / minute (assuming the original coupling coefficient is 0.5, and after adjustment it becomes 0.55), ensuring that the reagent can act more effectively on the coarse particles when the liquid level changes, improving the flotation efficiency, because the coarse particles need more reagents to change their surface properties and enhance their hydrophobicity, so that they can better adhere to the bubbles.

[0070] Or, for example, when the ratio of the first particle to the second particle is less than the second particle size threshold (assuming the second particle size threshold is 0.4, that is, the first particle accounts for less than 40%, indicating that there are more fine particles), the situation is different. At this time, the coupling coefficient between the aeration volume and the flow rate of the flotation slurry is reduced by the third particle size step (assuming it is 0.08). For example, if the flow rate of the flotation slurry increases by 10 cubic meters per hour, the original aeration volume increases by 5 cubic meters per minute, and after adjustment, it increases by 4.2 cubic meters per minute (assuming the original coupling coefficient is 0.5, and after adjustment, it becomes 0.42), so as to avoid excessive flotation of fine particles due to excessive aeration, which increases the ash content of the concentrate.

[0071] The coupling coefficient between the flow rate of flotation reagent and the slurry level is reduced with the fourth particle size step (assuming it is 0.03). For example, when the slurry level rises by 0.1 m, the original reagent flow rate increases by 5 liters / minute, and after adjustment it increases by 4.85 liters / minute (assuming the original coupling coefficient is 0.5, and after adjustment it becomes 0.47). This prevents waste caused by excessive addition of reagents and adverse effects on flotation selectivity. Because fine particles have a large relative surface area and are easy to adsorb reagents, a better flotation effect can be achieved without too much reagent. At the same time, excessive reagents can prevent fine particles from agglomerating with each other, affecting the flotation effect.

[0072] From the above, it can be concluded that the present disclosure realizes the refined and intelligent control of the coal slime flotation process by introducing the raw coal slime detection module 23 and closely combining it with the control module 24 and the multivariable coupling model. The raw coal slime detection module 23 can accurately analyze the particle size composition and mineral composition of the raw coal, providing basic data support for the flotation process. Through the multivariable coupling model, the system of the present disclosure can predict the flotation results under different parameter combinations, and automatically adjust the control parameters to ensure that the flotation process is always in the optimal state, further improving the flotation efficiency and concentrate quality. The present disclosure can automatically adjust the control parameters according to the changes in the properties of different coal slimes, thereby enhancing the adaptability and flexibility of the system. The raw coal slime detection module 23 and the multivariable coupling model can collect and process data in the flotation process in real time, providing strong support for production decisions.

[0073] Figure 2 is a structural schematic diagram of a second coal slime flotation process control autonomous regulation system based on multivariable coupling technology provided by an embodiment of the present disclosure; Figure 2 .

[0074] In one embodiment of the present disclosure, the control module 24 is further configured to increase the coupling coefficient between the aeration volume and the slurry level with a first component step length in response to the raw coal slime satisfying the first condition; In response to the raw coal slime satisfying the second condition, the coupling coefficient between the aeration volume and the slurry level is reduced with a second component step size.

[0075] In this embodiment, the components in the raw coal slime have an important influence on the flotation process. The first condition may be that the raw coal slime contains kaolin, illite or pyrite and the content is greater than the first flotation threshold. The second condition may be that the raw coal slime contains chalcopyrite or graphite and the content is greater than the second flotation threshold. The first flotation threshold and the second flotation threshold are determined based on experiments.

[0076] It should be noted that, since different minerals have different influences on the flotation effect, the first flotation threshold or the second flotation threshold corresponding to different minerals is different.

[0077] For example, the first flotation threshold corresponding to pyrite is 2%. When the pyrite content in the coal slime is 3%, the first condition is met. The presence of pyrite will change the surface properties of the coal particles, resulting in poor floatability.

[0078] At this time, the control module 24 increases the coupling coefficient between the aeration volume and the slurry level with the first component step (assuming it is 0.05). That is, when the slurry level changes, the aeration volume will change accordingly at a larger ratio. For example, when the slurry level rises by 0.1 meters, the original aeration volume increases by 2 cubic meters / minute, and after adjustment, it increases by 2.1 cubic meters / minute (assuming that the original coupling coefficient is 0.7, and after adjustment, it becomes 0.75). By increasing the degree of correlation between the aeration volume and the slurry level, the bubbles can contact the coal particles more effectively, especially when the pyrite content is high, the flotation ability of the coal particles is enhanced, the concentrate quality is improved, and the inclusion of impurities such as pyrite in the concentrate is reduced.

[0079] In this embodiment, different weights may be assigned to different first minerals to perform weighted calculation, and when the calculation result is greater than the first flotation threshold, it is also determined as the first condition; Different weights are assigned to different second minerals, and weighted calculation is performed. When the calculation result is greater than the second flotation threshold, it is also determined that the second condition is met; The first mineral is a mineral that has a negative impact on the flotation effect, and the second mineral is a mineral that has a positive impact on the flotation effect.

[0080] It can be concluded from the above that the present disclosure can achieve more precise control of the flotation process by identifying the key components in the coal slime and adjusting the coupling coefficient between the aeration volume and the slurry level according to the content of these components. The above control strategy takes into account the specific impact of the coal slime components on the flotation effect, thereby improving the accuracy and efficiency of flotation. When the coal slime contains minerals (such as pyrite) that have a negative impact on the flotation effect and the content exceeds a certain threshold, by increasing the coupling coefficient between the aeration volume and the slurry level, the system can more effectively contact the bubbles with the coal particles and enhance the flotation ability of the coal particles. This helps to reduce the inclusion of impurities in the concentrate and improve the purity and quality of the concentrate.

[0081] In one embodiment of the present disclosure, in response to the flow rate of the flotation slurry being greater than a first flow rate threshold flow rate step, the amount of flotation reagent added is increased; In response to the concentration of the incoming flotation slurry being greater than a first concentration threshold, increasing the amount of flotation reagent added by a first concentration step; In response to the slurry level being higher than a first level threshold, the coupling relationship between flotation froth layer properties and flotation reagent addition is increased with a first level step, and the coupling relationship between flotation froth layer properties and flotation aeration is increased with a second level step.

[0082] In this embodiment, the first flow rate threshold, the first concentration advance, the first liquid level threshold, the first liquid level step length, and the second liquid level step length are all confirmed through experiments.

[0083] When the pulp flow rate and pulp concentration entering the flotation equipment change, it will affect the amount of flotation reagent added and the proportion of flotation reagent added. For example, if the pulp flow rate increases or the concentration increases, the amount of reagent added needs to be increased to ensure the flotation effect.

[0084] The flotation slurry level affects the stability and collection of the foam layer, which in turn affects the properties of the flotation foam layer. The properties of the flotation foam layer are related to the amount of flotation reagent added and the amount of flotation aeration. Changes in the amount of reagent added will affect the adhesion effect between coal particles and bubbles, thereby changing the stability and structure of the foam layer. Changes in the amount of aeration will directly affect the number, size and rising speed of bubbles, thereby affecting the properties of the foam layer. For example, an increase in the amount of aeration and an increase in bubbles may make the foam layer richer, but it will also cause the foam layer to be unstable.

[0085] These variables influence and restrict each other, forming a multi-variable strong coupling relationship. In the actual coal slime flotation process, comprehensive consideration and adjustment are required to achieve the best flotation effect and product quality.

[0086] From the above, it can be concluded that the present disclosure realizes refined control of the coal slime flotation process by comprehensively considering multiple variables such as flotation slurry flow, slurry concentration, and slurry level, and adjusting the amount of flotation reagent added and the coupling relationship between the flotation foam layer properties and the amount of flotation reagent added and the amount of flotation aeration accordingly. The flotation effect and product quality are improved. The present disclosure can monitor and respond to changes in slurry flow, concentration, and level in real time, and automatically adjust control parameters, which enhances the adaptability and flexibility of the present disclosure, helps the system maintain a stable flotation effect under different working conditions, and improves the continuity and stability of the production process.

[0087] Figure 3 is a structural schematic diagram of a third coal slime flotation process control autonomous regulation system based on multivariable coupling technology provided by an embodiment of the present disclosure; Figure 3 .

[0088] The coal slime flotation process control autonomous regulation system based on multivariable coupling technology includes: a flotation slurry flow detector 1, a flotation slurry concentration detector 2, an aeration flow meter 3, an aeration regulating valve 4, a slurry level and foam layer limit detection unit 5, an emulsifying agent detection flow meter 6, an emulsifying agent flow regulating valve 7, a tailings gate position measurement and control unit 8, a flotation concentrate ash detection unit 9, a flotation tailings ash detection unit 10, a flotation parameter collection and execution output control cabinet 11, a reagent addition control module 12, an autonomous regulation system server 13 and a display 14.

[0089] The present embodiment also includes an autonomous adjustment system server 13, which is connected to the flotation parameter collection and execution output control cabinet 11 through a communication cable, and the autonomous adjustment system server 13 is connected to a display 14. The flotation parameter collection and execution output control cabinet 11 transmits the collected parameter data such as the flotation flow rate, flotation concentration, flotation aeration volume, flotation slurry level, flotation foam layer limit, flotation tailings gate height, flotation reagent addition amount, etc. to the autonomous adjustment system server 13 through the communication cable, visualizes the data through the display 14, and issues adjustment commands to the flotation parameter collection and execution output control cabinet 11. The autonomous adjustment system server 13 collects a large amount of historical data of parameters for intelligent model training, continuously optimizes and iterates the model through the newly added process data, improves the coal slime flotation process control autonomous adjustment system based on multivariable coupling technology, and realizes the intelligent autonomous adjustment of the coal slime flotation process.

[0090] Compared with the traditional coal slime flotation automatic control system, the present invention integrates multiple mutually coupled parameters that affect the coal slime flotation effect, and forms an autonomous adjustment system for coal slime flotation process control based on multivariable coupling technology through data acquisition and model training, optimizes the reagent addition amount, aeration volume, slurry level, slurry concentration, and tailings gate height in the flotation process, and realizes prediction and autonomous adjustment based on the ash content of flotation concentrate and flotation tailings, thereby ensuring the stability of coal slime flotation product indicators and improving the flotation rate of clean coal from coal slime flotation.

[0091] Figure 4 It is a schematic diagram of the structure of a slurry level and foam layer limit detection unit provided in an embodiment of the present disclosure; Figure 5 It is a schematic diagram of the structure of the tailings gate position measurement and control unit provided in an embodiment of the present disclosure; Figure 6 is a schematic diagram of the structure of a flotation concentrate ash detection unit provided in an embodiment of the present disclosure; Figure 7 It is a schematic diagram of the structure of a flotation tailings ash detection unit provided in an embodiment of the present disclosure; Figure 8 is a schematic diagram of the structure of a control cabinet provided in an embodiment of the present disclosure; Fig. 9 It is a structural diagram of the drug addition control module provided in an embodiment of the present disclosure.

[0092] refer to Figure 4-Figure 9The slurry level and foam layer limit detection unit 5 includes a flotation foam super-high limit electrode 5-1, a high limit electrode 5-2, a low limit electrode 5-3, a common electrode 5-4, a liquid level float 5-5, an electrode and a slurry level signal transmitter 5-6. The flotation foam super-high limit electrode 5-1, the high limit electrode 5-2, the low limit electrode 5-3, the common electrode 5-4 and the liquid level float 5-5 are all connected to the electrode and the slurry level signal transmitter 5-6. The electrode and the slurry level signal transmitter 5-6 are connected to the flotation parameter collection and execution output control cabinet 11 through a communication cable to realize the collection of slurry level and foam layer limit signals.

[0093] Emulsified agent detection flowmeter 6 and emulsified agent flow regulating valve 7. The flowmeter 6 is connected to the flotation parameter acquisition and execution output control cabinet 11 through 4-20mA standard current, 485 communication, Hart communication or other communication protocols to realize the acquisition of flotation emulsified agent chamber agent flow signal. The agent flow regulating valve 7 is connected to the flotation parameter acquisition and execution output control cabinet 11 through the signal cable to transmit the 4-20mA standard current signal, so as to realize the valve opening feedback signal acquisition and the valve opening setting signal is sent to the regulating valve, and is connected to the flotation parameter acquisition and execution output control cabinet 11 through the power cable to obtain the power supply.

[0094] The tailings gate position measurement and control unit 8 includes: a tailings gate lifting device 8-1 and a tailings gate position detection sensor 8-2, wherein the tailings gate lifting device 8-1 is connected to the flotation parameter collection and execution output control cabinet 11 through a control cable and a signal cable, receives the lifting control signal of the flotation parameter collection and execution output control cabinet 11 and completes the lifting action, and the tailings gate position detection sensor 8-2 feeds back 4-20mA or 485 communication signals to the flotation parameter collection and execution output control cabinet 11 through a signal cable or a communication cable, so as to realize the current height data collection of the tailings gate.

[0095] The flotation concentrate ash detection unit 9 includes: a flotation concentrate collector 9-1, a concentrate dehydration device 9-2, a dehydrated concentrate conveying device 9-3 and a dehydrated flotation concentrate ash meter 9-4; The flotation concentrate collector 9-1 collects the flotation concentrate slurry separated by the flotation machine and transports it to the concentrate dehydration device 9-2 for dehydration. The dehydrated loose coal particles or coal cakes are transported by the dehydrated concentrate conveying equipment 9-3. The dehydrated flotation concentrate ash meter 9-4 is set up above the conveying equipment to detect the ash content of the dehydrated flotation concentrate. The flotation concentrate ash content data is fed back to the flotation parameter collection and execution output control cabinet 11 to complete the flotation concentrate ash content collection.

[0096] The flotation tailings ash content detection unit 10 comprises: a flotation tailings collector 10-1 and a flotation tailings ash content meter 10-2; The flotation tailings are collected by the flotation tailings collector 10-1 and transported to the bottom of the flotation tailings ash meter 10-2. The flotation tailings ash meter 10-2 is mounted on the tailings slurry conveying pipeline or erected above the tailings slurry flow plane. The flotation tailings ash content is analyzed by X-ray detection and machine vision, and the data is fed back to the flotation parameter collection and execution output control cabinet 11 to complete the flotation tailings ash content parameter collection.

[0097] The flotation parameter collection and execution output control cabinet 11 can be connected to the flotation slurry flow detector 1, the flotation inlet flotation slurry concentration detector 2, the inflation volume detection flowmeter 3, the inflation volume regulating valve 4, the slurry level and foam layer limit detection unit 5, the emulsification agent detection flowmeter 6, the emulsification agent flow regulating valve 7, the tailings gate position measurement and control unit 8, the flotation concentrate ash detection unit 9, the flotation tailings ash detection unit 10, the flotation parameter collection and execution output control cabinet 11, the agent addition control module 12, and the autonomous adjustment system server 13 through power cables, power cables, control cables, signal cables, communication cables, etc., to perform parameter data collection and control command issuance, thereby realizing autonomous adjustment of the flotation process. Controller 11-1 serves as a core controller, and is connected to switch 11-2 through a communication cable for data communication, is connected to auxiliary contacts or coils of relay 11-3 through a signal cable for signal acquisition and command output, and is connected to wiring terminals of signal isolator 11-4 through a signal cable for signal acquisition and command output, is connected to power components 11-5 through a power cable, and is connected to control components 11-6 through a control cable. Wiring terminals 11-7 are connected to flotation slurry flow detector 1, flotation inlet flotation slurry concentration detector 2, inflation volume detection flowmeter 3, inflation volume regulating valve 4, slurry level and foam layer limit detection unit 5, emulsification agent detection flowmeter 6, emulsification agent flow regulating valve 7, tailings gate position measurement and control unit 8, flotation concentrate ash detection unit 9, flotation tailings ash detection unit 10, flotation parameter acquisition and execution output control cabinet 11, agent addition control module 12 and autonomous adjustment system server 13.

[0098] The reagent adding control module 12 specifically includes: a foaming agent pump 12-1, a collecting agent pump 12-2, a foaming agent flow meter 12-3, a collecting agent flow meter 12-4, a flotation agent emulsification pump 12-5, a reagent buffer box 12-6, a clean water flow meter 12-7, a clean water regulating valve 12-8, a reagent impurity removal device 12-9 and a clean water impurity removal device 12-10; The flotation reagent is cached by the reagent cache box 12-6, and the reagent cache box is connected to the frother pump 12-1 and the collector pump 12-2 through a stainless steel pipe to transport the flotation reagent. The instantaneous flow rate and the cumulative flow rate of the flotation reagent are detected by the frother flow meter 12-3 and the collector flow meter 12-4. The emulsified clean water flow entering the flotation reagent emulsification pump 12-5 is automatically adjusted by the clean water regulating valve 12-8 and the clean water flow meter 12-7 to realize the high-speed shear emulsification of the flotation reagent. The reagent and clean water are filtered and discharged by the reagent impurity removal equipment 12-9 and the clean water impurity removal equipment 12-10 to avoid clogging the reagent delivery pump and the emulsification pump. The reagent addition control module 12 feeds back the signal to the flotation parameter acquisition and execution output control cabinet 11, and at the same time receives the control command of the flotation parameter acquisition and execution output control cabinet 11 to realize the automatic delivery and addition of the flotation reagent.

[0099] The above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them. Although the present disclosure has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present disclosure.

Claims

1. An autonomous control system for coal slime flotation process based on multivariable coupling technology, characterized in that: include: Feed property detection module, used to detect the flow rate and solid concentration of the flotation slurry; Flotation equipment parameter measurement and control module, used to detect and control the parameters of the flotation equipment; Product quality inspection module, used to inspect flotation concentrate and flotation tailings; A reagent adding control module, used to detect the flow rate of the flotation reagent and the ratio of the flotation reagent to the emulsified clean water; A control module, used for sending control parameters to the flotation equipment parameter measurement and control module according to the information sent by the flotation equipment parameter measurement and control module; The feed property detection module, the flotation equipment parameter measurement and control module, the product quality detection module and the reagent addition control module are all connected to the control module.

2. The coal slime flotation process control autonomous adjustment system based on multivariable coupling technology as claimed in claim 1, characterized in that: The feed property detection module includes: a flotation slurry flow detector and a flotation slurry solid concentration detector; The flotation slurry flow detector is used to detect the flotation slurry flow; The flotation slurry solid concentration detector is used to detect the solid concentration of the flotation slurry; The flotation slurry flow rate detector and the flotation slurry solid concentration detector are both connected to the control module.

3. The coal slime flotation process control autonomous adjustment system based on multivariable coupling technology as claimed in claim 1, characterized in that: The flotation equipment parameter measurement and control module includes: an aeration volume measurement and control unit, a slurry level and foam layer limit detection unit, and a tailings gate position measurement and control unit; The inflation volume measurement and control unit is used to detect and control the inflation volume; The slurry level and foam layer limit detection unit is used to detect the slurry level and the position of the foam layer; The tailings gate position measurement and control unit is used to detect the position of the tailings gate and control the opening of the tailings gate; The inflation volume measurement and control unit, the slurry level and foam layer limit detection unit and the tailings gate position measurement and control unit are all connected to the control module.

4. The coal slime flotation process control autonomous adjustment system based on multivariable coupling technology as claimed in claim 1, characterized in that: The product quality detection module includes: a flotation concentrate ash detection unit and a flotation tailings ash detection unit; The flotation concentrate ash content detection unit is used to detect the ash content of the flotation concentrate; The flotation tailings ash content detection unit is used to detect the ash content of the flotation tailings; The flotation concentrate ash detection unit and the flotation tailings ash detection unit are both connected to the control module.

5. The coal slime flotation process control autonomous adjustment system based on multivariable coupling technology as claimed in claim 1, characterized in that: The reagent addition control module is also used to control the flow rate of the flotation reagent and the ratio of the flotation reagent to the emulsified water; The drug addition control module includes: a drug buffer and delivery unit, a drug flow detection unit, a drug emulsification unit and an impurity filtering unit; The reagent buffering and conveying unit is used for buffering and conveying the flotation reagent; The reagent flow detection unit is used to detect the flow of the flotation reagent; The reagent emulsification unit is used to control the ratio of the flotation reagent and the emulsified water; The impurity filtering unit is used to remove impurities in the flotation reagent and the emulsified water.

6. The coal slime flotation process control autonomous adjustment system based on multivariable coupling technology as claimed in claim 5, characterized in that: Also includes: Raw coal slime detection module; The raw coal slime detection module is used to detect the particle size composition and mineral composition of the raw coal slime; The raw coal slime detection module is connected to the control module.

7. The coal slime flotation process control autonomous adjustment system based on multivariable coupling technology as claimed in claim 1, characterized in that: The control module is specifically used to send control parameters to the flotation equipment parameter measurement and control module based on the multivariable coupling model and the information sent by the flotation equipment parameter measurement and control module.

8. The coal slime flotation process control autonomous adjustment system based on multivariable coupling technology as claimed in claim 7, characterized in that: The multivariable coupling model is a model trained based on the historical parameters of the flotation equipment and the properties of the flotation slurry.

9. The coal slime flotation process control autonomous adjustment system based on multivariable coupling technology as claimed in claim 6, characterized in that: The control module is further configured to, in response to the ratio of the first particles to the second particles of the raw coal slime being greater than a first particle size threshold, increase the coupling coefficient between the aeration volume and the flow rate of the flotation slurry with a first particle size step, and increase the coupling coefficient between the flow rate of the flotation reagent and the slurry level with a second particle size step; In response to the ratio of the first particles to the second particles of the raw coal slime being less than a second particle size threshold, reducing the coupling coefficient between the aeration volume and the flow rate of the flotation slurry with a third particle size step, and reducing the coupling coefficient between the flow rate of the flotation reagent and the slurry level with a fourth particle size step; The diameter of the first particle is greater than the diameter of the second particle.

10. The coal slime flotation process control autonomous adjustment system based on multivariable coupling technology as claimed in claim 6, characterized in that: The control module is further configured to increase the coupling coefficient between the aeration volume and the slurry level with a first component step length in response to the raw coal slime satisfying a first condition; In response to the raw coal slime satisfying the second condition, the coupling coefficient between the aeration volume and the slurry level is reduced with a second component step size.

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