A method, system, electronic equipment, and storage medium for operating control of an ultrafine grinding mill for kaolin.

Abstract

This application discloses a method, system, electronic device, and storage medium for controlling the operation of an ultrafine grinding mill for kaolin. The control method includes the following steps: S1, during startup, if the main shaft rotates less than a set number of revolutions after a set time has elapsed, it is determined that the ultrafine grinding mill is stalled, and a stop main motor command is output to control the ultrafine grinding mill to stop starting; S2, during operation, the operating current of the ultrafine grinding mill is collected in real time. Based on the operating current model of the main motor of the ultrafine grinding mill under the influence of different factors, the collected operating current of the ultrafine grinding mill is analyzed to determine the specific gravity of the slurry in the cylinder. When fluctuations in the specific gravity of the slurry are detected, the slurry inlet valve and water supply valve are automatically controlled to start and stop, and the specific gravity of the slurry in the cylinder is automatically adjusted to be within the optimal range. This application avoids stalling during startup and automatically adjusts the specific gravity of the slurry to be within the optimal range during operation, avoiding slurry overflow and stalling caused by fluctuations in the specific gravity of the slurry during operation.

Description

Technical Field

[0001] This invention relates to the field of grinding mill technology, and in particular to a method, system, electronic device and storage medium for operating control of an ultrafine grinding mill for kaolin. Background Technology

[0002] Coal-series kaolin is a superior non-metallic mineral resource in my country. Calcined kaolin, modified through ultrafine processing and high-temperature calcination, is widely used in paints, coatings, papermaking, rubber, cables, ceramics, and high-strength cement due to its high whiteness, good crystal form, large porosity, low bulk density, good chemical stability and insulation, and strong hiding power. The production of calcined kaolin requires grinding the raw ore into ultrafine powder with a particle size of approximately -2μm 94% (6000 mesh) before calcination. Achieving such a small particle size involves many processes, such as coarse crushing, coarse grinding, and fine grinding. In the fine grinding process, the raw ore slurry (solid content 50-52%) with a particle size below 325 mesh is mixed and proportioned with a chemical dispersant. This mixture is then ground into an ultrafine slurry of approximately -2μm 94% (6000 mesh) using grinding media—ceramic beads—in a fine grinding equipment before entering the next process for drying. The ultrafine grinding mill adopts a bottom-feed, top-discharge grinding method. The slurry and grinding media are mixed together and driven by the stirring blades to rotate within the cylinder to achieve the grinding effect. The distribution of the grinding media in the slurry directly affects the grinding efficiency. The distribution of the grinding media within the cylinder varies depending on the specific gravity of the slurry, as shown below. Figure 1 As shown.

[0003] When the specific gravity of the slurry and the grinding media are similar, the grinding media are evenly distributed, and the operating current of the ultrafine grinder fluctuates slightly around the normal operating current value, resulting in the best grinding effect. When the specific gravity of the slurry is greater than that of the grinding media, it accumulates at the slurry outlet under the action of buoyancy, reducing the motor load, decreasing the current, reducing grinding efficiency, and clogging the slurry outlet, leading to slurry overflow. When the specific gravity of the slurry is less than that of the grinding media, the grinding media settles at the bottom of the cylinder under the action of gravity, reducing grinding efficiency, increasing grinding resistance, increasing the motor load, increasing the current, and in severe cases, the operating current exceeds the motor protection current, causing tripping and abnormal shutdown. The operating current curves of the ultrafine grinder under different slurry specific gravities are shown below. Figure 2 As shown.

[0004] Currently, the main approach is to strictly control the moisture content of the slurry in the upstream process and control the specific gravity of the slurry fed into the ultrafine grinding mill to ensure its normal operating conditions. When the specific gravity of the slurry is unstable, it needs to be adjusted by manual water dilution, which carries the risk of over-watering and other uncertainties.

[0005] When an ultrafine grinding mill is restarted after a shutdown, it is considered a heavy-load start-up because the cylinder is filled with a mixture of slurry and grinding media. If the shutdown time is long or the previous shutdown was abnormal, the grinding media inside the cylinder may sink, and the lower grinding blades may become covered by the grinding media. In severe cases, this can cause the motor to stall during startup.

[0006] In summary, existing ultrafine grinding mills have the following problems during operation:

[0007] 1. During the restart process of an ultrafine grinding machine after shutdown, it is impossible to quickly determine whether the motor has started and stalled, which may directly cause the electrical protection of the equipment to activate, endangering the safety of the equipment.

[0008] 2. It heavily relies on the stability of the upstream slurry preparation process, such as manual water replenishment and dilution. If the upstream process fails, the slurry specific gravity will be too high or too low, which will reduce the grinding efficiency. In particular, if the slurry specific gravity is too low, the motor current will exceed the motor protection current and trip, endangering the safe use of the motor reducer. Furthermore, abnormal shutdown will easily cause the rotor to stall when restarted. Summary of the Invention

[0009] To address the aforementioned technical problems, this application provides a method for controlling the operation of an ultrafine grinding mill for kaolin, thereby solving the current technical issues that ultrafine grinding mills cannot detect motor stalling during startup, slurry overflow, and stalling caused by changes in slurry specific gravity during operation.

[0010] This application is achieved through the following solution:

[0011] A method for controlling the operation of an ultrafine grinding mill for kaolin includes the following steps:

[0012] S1. When starting, if the spindle rotates no more than the set number of revolutions after the timer reaches the set duration, it is determined that the ultrafine grinding machine is stalled, and a stop main motor command is output to control the ultrafine grinding machine to stop starting.

[0013] S2. During operation, the operating current of the ultrafine grinding mill is collected in real time. Based on the operating current model of the main motor of the ultrafine grinding mill under the influence of different factors, the collected operating current of the ultrafine grinding mill is analyzed to determine the specific gravity of the slurry in the cylinder. When fluctuations in the specific gravity of the slurry are detected, the starting and stopping of the slurry inlet valve and the water replenishment valve are automatically controlled to automatically adjust the specific gravity of the slurry in the cylinder to be within the optimal range. The different factors include: equipment mechanical failure, fluctuations in the specific gravity of the slurry, replenishment of grinding media, and wear of grinding media.

[0014] Further, step S1 specifically includes the following steps:

[0015] S11. When the system detects that the ultrafine grinding machine has started running, it checks the number of rotations of the spindle through the spindle speed measuring device and starts timing. The spindle speed measuring device includes four metal blocks protruding from the spindle evenly installed circumferentially on the outer peripheral wall of the spindle, a proximity switch opposite to the metal blocks, and a pulse counter connected to the proximity switch circuit. When the metal blocks rotate past the proximity switch, the proximity switch generates a pulse signal and stores it in the pulse counter. When the spindle rotates one revolution, the proximity switch generates four pulse signals.

[0016] S12. When the timing reaches 2 seconds, if the pulse counter value of the spindle speed measuring device is less than 2, it is determined that the ultrafine grinding machine is stalled, and a stop main motor command is output, and the ultrafine grinding machine stops starting.

[0017] Furthermore, step S2 specifically includes the following steps:

[0018] S21. Measure and obtain the main motor current curve under the influence of different factors within the set grinding cycle, thereby obtaining the main motor operating current model of the ultrafine grinding machine under the influence of different factors. The different factors include: equipment mechanical failure, slurry specific gravity fluctuation, replenishment of grinding media, and grinding media loss.

[0019] S22. Calculate the real-time collected operating current of the main motor of the ultrafine grinding machine to obtain the minute average value of the operating current of the main motor of the ultrafine grinding machine in the previous minute at the current moment.

[0020] S23. Obtain the increasing or decreasing trend of the minute average operating current of the ultrafine grinding machine within the set program cycle;

[0021] S24. Compare the increasing or decreasing trend of the minute average value of the main motor operating current of the ultrafine grinding mill within the set program cycle with the operating current model of the main motor of the ultrafine grinding mill under the influence of the slurry specific gravity fluctuation, determine whether there is a change in slurry specific gravity, and execute the corresponding fault handling process when the slurry specific gravity fluctuation is detected, control the start and stop of the slurry inlet valve and the water replenishment valve, and automatically adjust the slurry specific gravity in the cylinder to be within the optimal range.

[0022] Furthermore, in step S21, setting the main motor current curve under the influence of different factors within the grinding cycle to obtain the operating current model of the main motor of the ultrafine grinding machine under the influence of different factors specifically includes:

[0023] The main motor operating current fluctuation curve caused by grinding media loss during one grinding cycle, the main motor operating current fluctuation curve caused by replenishing grinding media, the main motor operating current fluctuation curve caused by equipment protection shutdown after equipment mechanical failure, the main motor operating current fluctuation curve in the first and second grinding cycles when the slurry specific gravity is too high, and the main motor operating current fluctuation curve in the first and second grinding cycles when the slurry specific gravity is too low. Among them, the main motor operating current change caused by the slurry specific gravity fluctuation is a continuous and uniform change with the same trend in the first grinding cycle.

[0024] Further, step S22 specifically includes the following steps:

[0025] S221. The system first defines an array data[1..60] containing 60 data. If no main motor start signal is detected, all data in the array are set to 0. If the main motor start signal is detected, the program will execute steps S222 to S223 once per second.

[0026] S222. Assign values ​​to the array data in turn, discard the original data of data

[60] , assign the original data of data

[59] to data

[60] , assign the original data of data

[58] to data

[59] , and so on, until the original data of data[1] is assigned to data[2], and assign the current running current of the main motor of the ultrafine grinding machine to data[1], so that the array stores 60 real-time current data collected every second in the previous minute.

[0027] S223. Calculate the average value of the array after the sequential recursive assignment to obtain the current minute average value of the main motor operating current of the ultrafine grinding machine, Iave.

[0028] Furthermore, step S23 specifically includes the following steps:

[0029] S231. If the main motor is not running or the feed valve is not open, set the following to 0: the average minute current Ic of the main motor of the ultrafine grinding mill in the previous cycle, the number of cycles n, the number of current increases n1, the number of current decreases n2, the number of program cycles with continuous current increases zj, and the number of program cycles with continuous current decreases jx.

[0030] S232. When the main motor is detected to be running and the feed valve is open, determine whether the average minute value of the main motor running current of the ultrafine grinding mill in the previous cycle is Ic. If Ic is 0, assign the current average minute value of the main motor running current of the ultrafine grinding mill Iave to Ic, increment the cycle number n by 1, and wait for the next cycle to start. If Ic is not 0, execute step S233.

[0031] S233. Compare the difference between the current minute average operating current Iave of the ultrafine grinding machine's main motor and the minute average operating current Ic of the ultrafine grinding machine's main motor in the previous cycle with the preset allowable current fluctuation range Ip for normal operation of the ultrafine grinding machine, where:

[0032] If the difference is greater than +Ip, perform the following steps:

[0033] The current increases by 1 the number of times n1 increases during the cycle;

[0034] Determine if n1 is greater than 3. If n1 is greater than 3, increment zj by 1 for the number of program cycles in which the continuous current increases, set n1 to 0, set jx to 0, and then execute step S234. If n1 is less than 3, set jx to 0 and then execute step S234.

[0035] If the difference is less than +Ip and greater than -Ip, set the number of program cycles for continuous current increase zj and the number of program cycles for continuous current decrease jx to 0, and then execute step S234.

[0036] If the difference is less than -Ip, perform the following steps:

[0037] The number of times the current decreases within the cycle period is incremented by 1 (n2).

[0038] Determine if n2 is greater than 3. If n2 is greater than 3, increment jx by 1 for the number of program cycles in which the continuous current decreases, set n2 to 0, set zj to 0, and then execute step S234. If n2 is less than 3, set zj to 0, and then execute step S234.

[0039] S234. Assign the current minute average value of the main motor operating current of the ultrafine grinding machine, Iave, to the minute average value of the main motor operating current of the ultrafine grinding machine in the previous cycle, Ic.

[0040] S235. Determine if the number of loops n within the cycle is less than 5. If not, increment the number of loops n within the cycle by 1, end the current program cycle, wait for one minute, and then start the next program cycle from step S231. If yes, set n to 1, set the number of times the current increases n1 and the number of times the current decreases n2 within the cycle to 0, end the current program cycle, wait for one minute, and then start the next program cycle from step S231.

[0041] Furthermore, step S24 specifically includes the following steps:

[0042] S241. Compare the increasing or decreasing trend of the minute average value of the main motor operating current of the ultrafine grinding mill within the set program cycle with the operating current model of the main motor of the ultrafine grinding mill under the influence of the slurry specific gravity fluctuation.

[0043] S242. If the average minute operating current of the main motor of the ultrafine grinding mill shows a decreasing trend, it is determined that the specific gravity of the slurry has increased, and the following steps shall be performed:

[0044] If the main motor is running, the slurry inlet valve is open, the average current per minute of the ultrafine grinding mill is less than the upper limit of the normal current Imax of the main motor of the ultrafine grinding mill set by the operator according to the process requirements, and the number of program cycles in which the continuous current decreases is greater than or equal to 3, the water supply valve is opened to replenish water into the cylinder for dilution; otherwise, the water supply valve is closed and an alarm is issued to remind the operator that the slurry specific gravity is too high and the slurry specific gravity needs to be stabilized by the previous process.

[0045] As the water supply valve opens, the slurry inside the cylinder is diluted, its specific gravity decreases, the grinding media changes its upward floating trend, and the operating current of the ultrafine mill increases. When the program cycle of judging the trend of the minute average operating current of the main motor of the ultrafine grinding mill ends, the number of program cycles in which the continuous current decreases is set to 0, and the water supply valve is disconnected. After the water supply stops, if the specific gravity of the slurry is still too high and the minute average operating current of the main motor of the ultrafine grinding mill is still in a state of continuous increase, after 3 program cycles, the number of program cycles in which the continuous current decreases is greater than or equal to 3 again, and water is supplied again for dilution. This periodic water supply and dilution is repeated to prevent the grinding media from accumulating at the top of the cylinder and to prevent slurry overflow.

[0046] S243. If the average minute current of the main motor of the ultrafine grinding mill shows an increasing trend, it is determined that the slurry specific gravity is decreasing, and the following steps are performed:

[0047] If the main motor is running, the feed valve is open, and the average current per minute of the ultrafine grinder exceeds the upper limit of the normal current Imax set by the operator according to the process requirements, and the number of program cycles with continuous current increase zj is greater than or equal to 3, an alarm will be issued, prompting the operator to pay attention to the low specific gravity of the slurry. The preceding process needs to stabilize the specific gravity of the slurry. At the same time, the feed valve is closed, and the system is in a static grinding state. The static grinding continues for the set duration. The fineness of the slurry in the cylinder is higher than the normal fineness, and the slurry temperature is also higher than the normal slurry temperature. The viscosity of the high-temperature, high-fineness slurry increases, and the grinding media adheres to the high-viscosity slurry and no longer sinks. The average current per minute of the ultrafine grinder's main motor decreases and maintains a stable state. If the preceding process has stabilized the specific gravity of the slurry, the feed valve can be manually opened again to continue working. If there is no stable slurry supply, normal shutdown is allowed.

[0048] This application also provides a control system for an ultrafine grinding mill for kaolin, including:

[0049] The start-up stall control module is used to determine if the main shaft rotates no more than a set number of revolutions after the set time has elapsed during startup. In this case, it outputs a stop main motor command to control the ultrafine grinding machine to stop starting.

[0050] The operation control module is used to collect the operating current of the ultrafine grinding mill in real time during operation. Based on the operating current model of the main motor of the ultrafine grinding mill under the influence of different factors, it analyzes the collected operating current of the ultrafine grinding mill to determine the specific gravity of the slurry in the cylinder. When fluctuations in the specific gravity of the slurry are detected, it automatically controls the start and stop of the slurry inlet valve and the water replenishment valve to automatically adjust the specific gravity of the slurry in the cylinder to be within the optimal range. The different factors include: equipment mechanical failure, fluctuations in the specific gravity of the slurry, replenishment of grinding media, and wear of grinding media.

[0051] This application also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the operation control method for the ultrafine grinding mill for kaolin.

[0052] This application also provides a storage medium including a stored program that, when the program is executed, controls the device containing the storage medium to perform the steps of the operation control method for the ultrafine grinding mill for kaolin.

[0053] Compared with the prior art, this application has the following advantages:

[0054] This application provides a method, system, electronic device, and storage medium for controlling the operation of an ultrafine grinding mill for kaolin. The control method, on the one hand, utilizes a shaft speed measuring device to promptly detect start-up stall during mill startup, enabling automatic detection of stall conditions and timely termination of startup before electrical protection trips, thus preventing equipment safety hazards. On the other hand, based on the ultrafine grinding mill's operating current model and automatic protection control mechanism, the method analyzes the operating current during operation to determine the slurry specific gravity within the mill cylinder, promptly detecting fluctuations in slurry specific gravity. It then automatically takes corresponding measures when these fluctuations occur, controlling the start / stop of the slurry inlet valve and water supply valve to automatically adjust the slurry specific gravity to the optimal range. This prevents slurry overflow and stalling caused by slurry specific gravity fluctuations during operation, protecting production and equipment safety, and ensuring the desired grinding effect is achieved.

[0055] In addition to the purposes, features, and advantages described above, this application has other purposes, features, and advantages. A further detailed description of this application will be provided below with reference to the figures. Attached Figure Description

[0056] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0057] Figure 1 This is a schematic diagram of the specific structure of the speed measuring device of this application.

[0058] Figure 2 This is a schematic diagram of the signal configuration of the speed measuring device of this application.

[0059] Figure 3 This is a schematic diagram of the detection element and actuator of this application.

[0060] Figure 4 This is a schematic diagram of the data processing flow of this application.

[0061] Figure 5 This is a schematic diagram of the operation control method of an ultrafine grinding mill for kaolin according to a preferred embodiment of this application.

[0062] Figure 6 This is a flowchart illustrating a sub-step of step S1 in a preferred embodiment of this application.

[0063] Figure 7 This application presents a schematic diagram of the start-up stall control process according to a preferred embodiment.

[0064] Figure 8 This is a flowchart illustrating a sub-step of step S2 in a preferred embodiment of this application.

[0065] Figure 9 It is a curve showing the relationship between the slurry specific gravity and the mill operating current.

[0066] Figure 10 This is a schematic diagram of the main motor current curves under the influence of different factors.

[0067] Figure 11 A flowchart illustrating the sub-steps of step S22 in the preferred embodiment of this application.

[0068] Figure 12 The flowchart of the calculation of the minute average operating current of the main motor of the ultrafine grinding machine in the previous minute of the current time in the preferred embodiment of this application is shown.

[0069] Figure 13 This is a flowchart illustrating the trend of increasing or decreasing average minute operating current of the ultrafine grinding machine according to a preferred embodiment of this application.

[0070] Figure 14 This is a schematic diagram of the processing flow after determining the increased specific gravity of the slurry.

[0071] Figure 15This is a schematic diagram of the main motor operating current curve when the slurry specific gravity increases.

[0072] Figure 16 This is a schematic diagram of the processing flow after determining the reduction in the specific gravity of the slurry.

[0073] Figure 17 This is a schematic diagram of the main motor operating current curve when the slurry specific gravity decreases.

[0074] Figure 18 This is a schematic diagram of the operation control system module of the kaolin ultrafine grinding mill according to a preferred embodiment of this application.

[0075] Figure 19 This is a schematic block diagram of an electronic device according to a preferred embodiment of this application.

[0076] Figure 20 This is an internal structural diagram of a computer device according to a preferred embodiment of this application.

[0077] In the diagram: 1. Metal block; 2. Main shaft; 3. Proximity switch; 4. Main motor; 5. Reducer; 6. Coupling; 7. Main shaft assembly; 8. Connecting cylinder; 9. Slurry discharge device; 10. Cylinder; 11. Support. Detailed Implementation

[0078] The embodiments of this application are described in detail below with reference to the accompanying drawings; however, this application may be implemented in a variety of different ways as defined and covered below.

[0079] To address the aforementioned issues, this application designs an ultrafine grinding mill operation monitoring system and anti-stagnation protection device. This system automatically detects stalling during heavy-load startup of the ultrafine grinding mill, ensuring safe equipment startup. During operation, the system analyzes the sampling current of the ultrafine grinding mill to determine the specific gravity of the slurry inside the mill. When the slurry specific gravity fluctuates, timely and automatic measures are taken to protect production and equipment safety. The system consists of detection elements, a data processing unit, and execution elements.

[0080] The detection components include the main motor current transmitter (IT) and the speed measuring device (ST), which can detect parameters such as the operating current of the ultrafine grinding main motor and the spindle rotation speed in real time.

[0081] The current transmitter (IT) converts the 0-5A current signal from the current transformer of the main motor drive into a standard 4-20mA signal, which is then transmitted to the data processing unit. The speed measuring device (ST) is a specially designed device for this system to detect the spindle rotation speed. Specific structure and signal configuration are detailed in the documentation. Figure 1 and Figure 2 .

[0082] Four metal blocks 1 protruding from the main shaft 2 are evenly installed around the main shaft 2. When the metal block 1 rotates past the proximity switch 3, the proximity switch 3 generates a pulse signal. When the main shaft 1 rotates one revolution, the proximity switch 3 generates four pulse signals.

[0083] The actuator includes a slurry inlet valve V1 and a water supply valve V2. The equipment connection between the detection element and the actuator is as follows: Figure 3 As shown, from top to bottom, it includes a main motor 4, a reducer 5, a coupling 6, a main shaft assembly 7, a connecting cylinder 8, a slurry discharge device 9, a cylinder 10, and a support 11, which are connected in sequence.

[0084] The data processing unit calculates and processes the data transmitted from the detection elements, and sends the processing results to each execution element to complete the required logical actions. The system's data processing flow is as follows: Figure 4 As shown.

[0085] like Figure 5 As shown, a preferred embodiment of this application provides a method for controlling the operation of an ultrafine grinding mill for kaolin, comprising the following steps:

[0086] S1. When starting, if the spindle rotates no more than the set number of revolutions after the timer reaches the set duration, it is determined that the ultrafine grinding machine is stalled, and a stop main motor command is output to control the ultrafine grinding machine to stop starting.

[0087] S2. During operation, the operating current of the ultrafine grinding mill is collected in real time. Based on the operating current model of the main motor of the ultrafine grinding mill under the influence of different factors, the collected operating current of the ultrafine grinding mill is analyzed to determine the specific gravity of the slurry in the cylinder. When fluctuations in the specific gravity of the slurry are detected, the slurry inlet valve and water replenishment valve are controlled to start and stop, and the specific gravity of the slurry in the cylinder is automatically adjusted to be within the optimal range. The different factors include: equipment mechanical failure, fluctuations in the specific gravity of the slurry, replenishment of grinding media, and wear of grinding media.

[0088] This embodiment provides a method for controlling the operation of an ultrafine grinding mill for kaolin. On one hand, the method utilizes a shaft speed measuring device to detect start-up stall in a timely manner, enabling automatic detection of stall conditions during startup and timely termination of the start-up before the equipment's electrical protection activates, thus preventing equipment safety hazards. On the other hand, based on the ultrafine grinding mill's operating current model and automatic protection control mechanism, the method analyzes the operating current during operation to determine the specific gravity of the slurry inside the mill. It promptly detects fluctuations in slurry specific gravity and automatically takes corresponding measures when these fluctuations occur, controlling the start and stop of the slurry inlet valve and water supply valve to automatically adjust the slurry specific gravity to the optimal range. This prevents slurry overflow and stalling caused by slurry specific gravity fluctuations during operation, protecting production and equipment safety, and ensuring the desired grinding effect is achieved.

[0089] Preferably, such as Figure 6 and Figure 7 As shown, step S1 specifically includes the following steps:

[0090] S11. When the system detects that the ultrafine grinding machine has started running (rising edge of the ultrafine grinding machine start / stop status signal), it checks the number of rotations of the spindle through the spindle speed measuring device and starts timing. The spindle speed measuring device includes four metal blocks protruding from the spindle evenly installed circumferentially on the outer peripheral wall of the spindle, a proximity switch opposite to the metal blocks, and a pulse counter connected to the proximity switch circuit. When the metal block passes the proximity switch, the proximity switch generates a pulse signal and stores it in the pulse counter. When the spindle rotates one revolution, the proximity switch generates four pulse signals.

[0091] S12. After 2 seconds of timing, if the pulse counter value of the spindle speed measuring device is less than 2 (the spindle rotation does not exceed half a turn), it is determined that the ultrafine grinding machine is stalled during startup, and a command to stop the main motor is output, and the ultrafine grinding machine stops starting.

[0092] Preferably, such as Figure 8 As shown, step S2 specifically includes the following steps:

[0093] S21. Measure and obtain the main motor current curve under the influence of different factors within the set grinding cycle, thereby obtaining the main motor operating current model of the ultrafine grinding machine under the influence of different factors. The different factors include: equipment mechanical failure, slurry specific gravity fluctuation, replenishment of grinding media, and grinding media loss.

[0094] S22. Calculate the real-time collected operating current of the main motor of the ultrafine grinding machine to obtain the minute average value of the operating current of the main motor of the ultrafine grinding machine in the previous minute at the current moment.

[0095] S23. Obtain the increasing or decreasing trend of the minute average operating current of the ultrafine grinding machine within the set program cycle;

[0096] S24. Compare the increasing or decreasing trend of the minute average operating current of the main motor of the ultrafine grinding mill within the set program cycle with the operating current model of the main motor of the ultrafine grinding mill under the influence of slurry specific gravity fluctuation, determine whether there is a change in slurry specific gravity, and execute the corresponding fault handling process when a change in slurry specific gravity is detected, control the start and stop of the slurry inlet valve and water replenishment valve, and automatically adjust the slurry specific gravity in the cylinder to be within the optimal range, so as to avoid the phenomenon of the ultrafine grinding mill tripping due to exceeding the protection value or slurry overflow.

[0097] Specifically, many factors affect the operating current of an ultrafine grinding mill, such as fluctuations in slurry specific gravity, wear and replenishment of grinding media, and mechanical failures of the equipment. The changes in operating current caused by different reasons will vary. The relationship curve between current changes due to slurry specific gravity fluctuations is shown in the figure. Figure 9 Other causes of current changes are as follows: Figure 10 As shown, therefore, in step S21, the main motor current curve under the influence of different factors during the grinding cycle is set (e.g., Figure 10 As shown, the operating current model of the main motor of the ultrafine grinding machine under the influence of different factors is specifically included:

[0098] Within a grinding cycle (with a slurry residence time of approximately 30 minutes in the cylinder as one cycle), the main motor operating current fluctuation curve caused by grinding media loss shows a negligible decrease in current. The main motor operating current fluctuation curve caused by replenishing grinding media shows a small, rapid increase followed by stabilization within a very short time. The main motor operating current fluctuation curves also show the effects of equipment protection shutdown following a mechanical failure, the main motor operating current fluctuation curves during the first and second grinding cycles when the slurry specific gravity is too high, and the main motor operating current fluctuation curves during the first and second grinding cycles when the slurry specific gravity is too low. Notably, the main motor operating current change caused by slurry specific gravity fluctuations is continuous and exhibits a uniform trend within the first grinding cycle. Timely detection and handling within this cycle can effectively prevent motor overload tripping and abnormal shutdowns.

[0099] Preferably, such as Figure 11 and Figure 12 As shown, step S22 specifically includes the following steps:

[0100] S221. The system first defines an array data[1..60] containing 60 data. If no main motor start signal is detected, all data in the array are set to 0. If the main motor start signal is detected, the program will execute steps S222 to S223 once per second.

[0101] S222. Assign values ​​to the array data in turn, discard the original data of data

[60] , assign the original data of data

[59] to data

[60] , assign the original data of data

[58] to data

[59] , and so on, until the original data of data[1] is assigned to data[2], and assign the current running current of the main motor of the ultrafine grinding machine to data[1], so that the array stores 60 real-time current data collected every second in the previous minute.

[0102] S223. Calculate the average value of the array after the sequential recursive assignment to obtain the current minute average value of the main motor operating current of the ultrafine grinding machine, Iave.

[0103] In this embodiment, the program executes once per second, and the minute-by-minute average operating current of the ultrafine grinding machine is refreshed once. The minute-by-minute average operating current of the ultrafine grinding machine is a filtered and smoothed value of the real-time operating current, and its changes more accurately reflect the changing trend of the operating current of the ultrafine grinding machine.

[0104] Preferably, such as Figure 13 As shown, step S23 specifically includes the following steps:

[0105] S231. If the main motor is not running or the feed valve is not open, set the following to 0: the average minute current Ic of the main motor of the ultrafine grinding mill in the previous cycle, the number of cycles n, the number of current increases n1, the number of current decreases n2, the number of program cycles with continuous current increases zj, and the number of program cycles with continuous current decreases jx.

[0106] S232. When the main motor is detected to be running and the feed valve is open, determine whether the average minute value of the main motor running current of the ultrafine grinding mill in the previous cycle, Ic, is 0. If Ic is 0 (n=0 in the first cycle), assign the current average minute value of the main motor running current of the ultrafine grinding mill, Iave, to Ic. Increment the number of cycles n in the cycle by 1 (n=1) and wait to start the next cycle. If Ic is not 0, execute step S233.

[0107] S233. Compare the difference between the current minute average operating current Iave of the ultrafine grinding machine's main motor and the minute average operating current Ic of the ultrafine grinding machine's main motor in the previous cycle with the preset allowable current fluctuation range Ip for normal operation of the ultrafine grinding machine, where:

[0108] If the difference is greater than +Ip, perform the following steps:

[0109] a. The number of times the current increases within the cycle, n1, is incremented by 1;

[0110] b. Determine if n1 is greater than 3 (the number of times the current increases within one program cycle is greater than 3). If n1 is greater than 3, increment zj by 1 for the number of program cycles in which the current increases continuously, set n1 to 0, set jx to 0, and then execute step S234. If n1 is less than 3, set jx to 0, and then execute step S234.

[0111] If the difference is less than +Ip and greater than -Ip, set the number of program cycles for continuous current increase zj and the number of program cycles for continuous current decrease jx to 0, and then execute step S234.

[0112] If the difference is less than -Ip, perform the following steps:

[0113] a. The number of times the current decreases within the cycle period is n2 plus 1;

[0114] b. Determine if n2 is greater than 3 (the number of times the current increases within one program cycle is greater than 3). If n2 is greater than 3, increment jx by 1 for the number of program cycles in which the current decreases continuously, set n2 to 0, set zj to 0, and then execute step S234. If n2 is less than 3, set zj to 0, and then execute step S234.

[0115] S234. Assign the current minute average value of the main motor operating current of the ultrafine grinding machine, Iave, to the minute average value of the main motor operating current of the ultrafine grinding machine in the previous cycle, Ic.

[0116] S235. Determine if the number of loops n within the cycle is less than 5. If not, increment the number of loops n within the cycle by 1, end the current program cycle, wait for one minute, and then start the next program cycle from step S231. If yes, set n to 1, set the number of times the current increases n1 and the number of times the current decreases n2 within the cycle to 0, end the current program cycle, wait for one minute, and then start the next program cycle from step S231.

[0117] Preferably, step S24 specifically includes the following steps:

[0118] S241. Compare the increasing or decreasing trend of the minute average value of the main motor operating current of the ultrafine grinding mill within the set program cycle with the operating current model of the main motor of the ultrafine grinding mill under the influence of the slurry specific gravity fluctuation.

[0119] S242. If the average minute operating current of the main motor of the ultrafine grinding mill shows a decreasing trend, it is determined that the slurry specific gravity has increased. Then, proceed with the following steps (see...). Figure 14 ):

[0120] If the main motor is running, the slurry inlet valve is open, the average current per minute of the ultrafine grinding mill is less than the upper limit of the normal current Imax of the main motor of the ultrafine grinding mill set by the operator according to the process requirements, and the number of program cycles in which the continuous current decreases is greater than or equal to 3, the water supply valve is opened to replenish water into the cylinder for dilution; otherwise, the water supply valve is closed and an alarm is issued to remind the operator that the slurry specific gravity is too high and the slurry specific gravity needs to be stabilized by the previous process.

[0121] As the water supply valve opens, the slurry inside the cylinder is diluted, its specific gravity decreases, and the grinding media changes its upward floating trend. The operating current of the ultrafine grinder increases. At the end of the program cycle for judging the trend of the minute average operating current of the ultrafine grinder's main motor, the number of program cycles with continuously decreasing current is set to 0, and the water supply valve is disconnected (water supply time is 5 minutes). After stopping water supply, if the slurry specific gravity is still too high and the minute average operating current of the ultrafine grinder's main motor is still in a state of continuous increase, after 3 program cycles (15 minutes), the number of program cycles with continuously decreasing current jx is again greater than or equal to 3, and water is supplied again for dilution for 5 minutes. This periodic water supply and dilution is repeated to prevent the grinding media from accumulating at the top of the cylinder and to prevent slurry overflow (see the operating current curve for details). Figure 15 );

[0122] S243. If the average minute operating current of the main motor of the ultrafine grinding mill shows an increasing trend, it is determined that the slurry specific gravity is decreasing. Then, proceed with the following steps (see...). Figure 16 ):

[0123] If the main motor is running, the feed valve is open, and the average minute current of the ultrafine grinder exceeds the maximum normal current limit Imax set by the operator according to the process requirements, and the number of program cycles with continuous current increase zj is greater than or equal to 3, an alarm will be issued, prompting the operator to note that the slurry specific gravity is too low and that the preceding process needs to stabilize the slurry specific gravity. Simultaneously, the feed valve will be closed, and the system will be in a static grinding state. Static grinding will continue for approximately 15 minutes. The fineness of the slurry inside the cylinder will be higher than normal, and the slurry temperature will also be higher than normal. The viscosity of the high-temperature, high-fineness slurry will increase, and the grinding media will adhere to the slurry and no longer sink. The average minute current of the ultrafine grinder's main motor will decrease and maintain a stable state. If the preceding process has stabilized the slurry specific gravity, the feed valve can be manually opened again to continue operation. If there is no stable slurry supply, a normal shutdown is allowed. In this high-viscosity slurry state, the grinding media inside the cylinder will remain suspended, preventing stalling during the next startup (see the operating current curve for details). Figure 17 ).

[0124] like Figure 18 As shown, a preferred embodiment of this application provides an operation control system for an ultrafine grinding mill for kaolin, comprising:

[0125] The start-up stall control module is used to determine if the main shaft rotates no more than a set number of revolutions after the set time has elapsed during startup. In this case, it outputs a stop main motor command to control the ultrafine grinding machine to stop starting.

[0126] The operation control module is used to collect the operating current of the ultrafine grinding mill in real time during operation. Based on the operating current model of the main motor of the ultrafine grinding mill under the influence of different factors, it analyzes the collected operating current of the ultrafine grinding mill to determine the specific gravity of the slurry in the cylinder. When fluctuations in the specific gravity of the slurry are detected, it automatically controls the start and stop of the slurry inlet valve and the water replenishment valve to automatically adjust the specific gravity of the slurry in the cylinder to be within the optimal range. The different factors include: equipment mechanical failure, fluctuations in the specific gravity of the slurry, replenishment of grinding media, and wear of grinding media.

[0127] like Figure 19 As shown, a preferred embodiment of this application also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the steps of the operation control method for the kaolin ultrafine grinding mill described in the above embodiments.

[0128] like Figure 20 As shown, a preferred embodiment of this application also provides a computer device, which may be a terminal or a liveness detection server, and its internal structure diagram may be as follows. Figure 20 As shown. The computer device includes a processor, memory, and a network interface connected via a system bus. The processor provides computing and control capabilities. The memory includes a non-volatile storage medium and internal memory. The non-volatile storage medium stores the operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage medium. The network interface is used to communicate with other external computer devices via a network connection. When the computer program is executed by the processor, it implements the steps of the above-described method for controlling the operation of an ultrafine grinding mill for kaolin.

[0129] Those skilled in the art will understand that Figure 20 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0130] A preferred embodiment of this application also provides a storage medium, the storage medium including a stored program, which, when the program is executed, controls the device where the storage medium is located to perform the steps of the kaolin ultrafine grinding mill operation control method described in the above embodiments.

[0131] It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and although a logical order is shown in the flowchart, in some cases the steps shown or described may be executed in a different order than that shown here.

[0132] If the functions described in this embodiment are implemented as software functional units and sold or used as independent products, they can be stored in one or more computing device-readable storage media. Based on this understanding, the parts of this application's embodiments that contribute to the prior art or the technical solutions can be embodied in the form of a software product. This software product is stored in a storage medium and includes several instructions to cause a computing device (which may be a personal computer, server, mobile computing device, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage media include: USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, optical disks, and other media capable of storing program code.

[0133] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code. The solutions in the embodiments of this application can be implemented in various computer languages, such as the object-oriented programming language Java and the interpreted scripting language JavaScript.

[0134] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A system that specifies functions in one or more boxes.

[0135] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including an instruction set implemented in a process. Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0136] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0137] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0138] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A method for controlling the operation of an ultrafine grinding mill for kaolin, characterized in that, Includes the following steps: S1. When starting, if the spindle rotates no more than the set number of revolutions after the timer reaches the set duration, it is determined that the ultrafine grinding machine is stalled, and a stop main motor command is output to control the ultrafine grinding machine to stop starting. S2. During operation, the operating current of the ultrafine grinding mill is collected in real time. Based on the operating current model of the main motor of the ultrafine grinding mill under the influence of different factors, the collected operating current is analyzed to determine the specific gravity of the slurry in the cylinder. When fluctuations in the slurry specific gravity are detected, the slurry inlet valve and water replenishment valve are automatically controlled to start and stop, and the slurry specific gravity in the cylinder is automatically adjusted to be within the optimal range. The different factors include: equipment mechanical failure, fluctuations in slurry specific gravity, replenishment of grinding media, and grinding media loss. The automatic control of the slurry inlet valve and water replenishment valve when fluctuations in slurry specific gravity are detected includes the following steps: if it is determined that the slurry specific gravity has increased, the water replenishment valve is automatically started to replenish water for dilution; if it is determined that the slurry specific gravity has decreased, the slurry inlet valve is automatically closed.

2. The operation control method for an ultrafine grinding mill for kaolin as described in claim 1, characterized in that, Step S1 specifically includes the following steps: S11. When the system detects that the ultrafine grinding machine has started running, it checks the number of rotations of the spindle through the spindle speed measuring device and starts timing. The spindle speed measuring device includes four metal blocks protruding from the spindle evenly installed circumferentially on the outer peripheral wall of the spindle, a proximity switch opposite to the metal blocks, and a pulse counter connected to the proximity switch circuit. When the metal blocks rotate past the proximity switch, the proximity switch generates a pulse signal and stores it in the pulse counter. When the spindle rotates one revolution, the proximity switch generates four pulse signals. S12. When the timing reaches 2 seconds, if the pulse counter value of the spindle speed measuring device is less than 2, it is determined that the ultrafine grinding machine is stalled, and a stop main motor command is output, and the ultrafine grinding machine stops starting.

3. The operation control method for an ultrafine grinding mill for kaolin as described in claim 2, characterized in that, Step S2 specifically includes the following steps: S21. Measure and obtain the main motor current curve under the influence of different factors within the set grinding cycle, thereby obtaining the main motor operating current model of the ultrafine grinding machine under the influence of different factors. The different factors include: equipment mechanical failure, slurry specific gravity fluctuation, replenishment of grinding media, and grinding media loss. S22. Calculate the real-time collected operating current of the main motor of the ultrafine grinding machine to obtain the minute average value of the operating current of the main motor of the ultrafine grinding machine in the previous minute at the current moment. S23. Obtain the increasing or decreasing trend of the minute average operating current of the ultrafine grinding machine within the set program cycle; S24. Compare the increasing or decreasing trend of the minute average value of the main motor operating current of the ultrafine grinding mill within the set program cycle with the operating current model of the main motor of the ultrafine grinding mill under the influence of the slurry specific gravity fluctuation, determine whether there is a change in slurry specific gravity, and execute the corresponding fault handling process when the slurry specific gravity fluctuation is detected, control the start and stop of the slurry inlet valve and the water replenishment valve, and automatically adjust the slurry specific gravity in the cylinder to be within the optimal range.

4. The operation control method for an ultrafine grinding mill for kaolin as described in claim 3, characterized in that, In step S21, setting the main motor current curve under the influence of different factors during the grinding cycle to obtain the operating current model of the main motor of the ultrafine grinding machine under the influence of different factors specifically includes: The main motor operating current fluctuation curve caused by grinding media loss during one grinding cycle, the main motor operating current fluctuation curve caused by replenishing grinding media, the main motor operating current fluctuation curve caused by equipment protection shutdown after equipment mechanical failure, the main motor operating current fluctuation curve in the first and second grinding cycles when the slurry specific gravity is too high, and the main motor operating current fluctuation curve in the first and second grinding cycles when the slurry specific gravity is too low. Among them, the change in main motor operating current caused by the change in slurry specific gravity is a continuous and uniform change with the same trend in the first grinding cycle.

5. The operation control method for an ultrafine grinding mill for kaolin as described in claim 3, characterized in that, Step S22 specifically includes the following steps: S221. The system first defines an array data[1..60] containing 60 data. If no main motor start signal is detected, all data in the array are set to 0. If the main motor start signal is detected, the program will execute steps S222 to S223 once per second. S222. Assign values ​​to the array data in turn, discard the original data of data[60], assign the original data of data[59] to data[60], assign the original data of data[58] to data[59], and so on, until the original data of data[1] is assigned to data[2], and assign the current running current of the main motor of the ultrafine grinding machine to data[1], so that the array stores 60 real-time current data collected every second in the previous minute at the current moment; S223. Calculate the average value of the array after the sequential recursive assignment to obtain the current minute average value of the main motor operating current of the ultrafine grinding machine, Iave.

6. The operation control method for an ultrafine grinding mill for kaolin as described in claim 3, characterized in that, Step S23 specifically includes the following steps: S231. If the main motor is not running or the feed valve is not open, set the following to 0: the average minute current Ic of the main motor of the ultrafine grinding mill in the previous cycle, the number of cycles n, the number of current increases n1, the number of current decreases n2, the number of program cycles with continuous current increases zj, and the number of program cycles with continuous current decreases jx. S232. When the main motor is detected to be running and the feed valve is open, determine whether the average minute value of the main motor running current of the ultrafine grinding mill in the previous cycle is Ic. If Ic is 0, assign the current average minute value of the main motor running current of the ultrafine grinding mill Iave to Ic, increment the cycle number n by 1, and wait for the next cycle to start. If Ic is not 0, execute step S233. S233. Compare the difference between the current minute average operating current Iave of the ultrafine grinding machine's main motor and the minute average operating current Ic of the ultrafine grinding machine's main motor in the previous cycle with the preset allowable current fluctuation range Ip for normal operation of the ultrafine grinding machine, where: If the difference is greater than +Ip, perform the following steps: The current increases by 1 the number of times n1 increases during the cycle; Determine if n1 is greater than 3. If n1 is greater than 3, increment zj by 1 for the number of program cycles in which the continuous current increases, set n1 to 0, set jx to 0, and then execute step S234. If n1 is less than 3, set jx to 0 and then execute step S234. If the difference is less than +Ip and greater than -Ip, set the number of program cycles for continuous current increase zj and the number of program cycles for continuous current decrease jx to 0, and then execute step S234. If the difference is less than -Ip, perform the following steps: The number of times the current decreases within the cycle period is incremented by 1 (n2). Determine if n2 is greater than 3. If n2 is greater than 3, increment jx by 1 for the number of program cycles in which the continuous current decreases, set n2 to 0, set zj to 0, and then execute step S234. If n2 is less than 3, set zj to 0, and then execute step S234. S234. Assign the current minute average value of the main motor operating current of the ultrafine grinding machine, Iave, to the minute average value of the main motor operating current of the ultrafine grinding machine in the previous cycle, Ic. S235. Determine if the number of loops n within the cycle is less than 5. If yes, increment the number of loops n within the cycle by 1, end the current program cycle, wait one minute, and then start the next program cycle from step S231. If no, set n to 1, set the number of times the current increases n1 and the number of times the current decreases n2 within the cycle to 0, end the current program cycle, wait one minute, and then start the next program cycle from step S231.

7. The operation control method for an ultrafine grinding mill for kaolin as described in claim 6, characterized in that, Step S24 specifically includes the following steps: S241. Compare the increasing or decreasing trend of the minute average value of the main motor operating current of the ultrafine grinding mill within the set program cycle with the operating current model of the main motor of the ultrafine grinding mill under the influence of the slurry specific gravity fluctuation. S242. If the average minute operating current of the main motor of the ultrafine grinding mill shows a decreasing trend, it is determined that the specific gravity of the slurry has increased, and the following steps shall be performed: If the main motor is running, the slurry inlet valve is open, the average minute current of the main motor of the ultrafine grinding mill (Iave) is less than the upper limit of the normal current of the main motor of the ultrafine grinding mill (Imax) set by the operator according to the process requirements, and the number of program cycles in which the current decreases continuously (jx) is greater than or equal to 3, the water supply valve is opened to add water to the cylinder for dilution; otherwise, the water supply valve is closed and an alarm is issued to remind the operator that the slurry specific gravity is too high and the slurry specific gravity needs to be stabilized by the preceding process. As the water supply valve opens, the slurry inside the cylinder is diluted, its specific gravity decreases, and the grinding media changes its upward floating trend. The operating current of the main motor of the ultrafine grinder increases. When the difference is within the preset allowable current fluctuation range Ip for normal operation of the ultrafine grinder, the number of program cycles jx for continuous current reduction is set to 0, and the water supply valve is disconnected. After water supply stops, if the slurry specific gravity is still too high and the average minute operating current of the main motor of the ultrafine grinder is still in a state of continuous reduction, after 3 program cycles, the number of program cycles jx for continuous current reduction is again greater than or equal to 3, and water is supplied again for dilution. This periodic water supply and dilution is repeated to prevent the grinding media from accumulating at the top of the cylinder and to prevent slurry overflow. S243. If the average minute current of the main motor of the ultrafine grinding mill shows an increasing trend, it is determined that the slurry specific gravity is decreasing, and the following steps are performed: If the main motor is running, the slurry inlet valve is open, and the minute average current (Iave) of the ultrafine grinding mill's main motor exceeds the upper limit (Imax) of the normal operating current set by the operator according to the process requirements, and the number of program cycles with continuous current increase (zj) is greater than or equal to 3, an alarm will be issued, prompting the operator to note that the slurry specific gravity is too low and that the preceding process needs to stabilize the slurry specific gravity. At the same time, the slurry inlet valve will be closed, and the system will be in a static grinding state. The static grinding will continue for the set duration. The fineness of the slurry in the cylinder will be higher than the normal fineness, and the slurry temperature will also be higher than the normal slurry temperature. The viscosity of the high-temperature, high-fineness slurry will increase, and the grinding media will adhere to the high-viscosity slurry and no longer sink. The minute average current of the ultrafine grinding mill's main motor will decrease and maintain a stable state. If the preceding process has stabilized the slurry specific gravity, the slurry inlet valve can be manually opened again to continue operation. If there is no stable slurry supply, normal shutdown is allowed.

8. A control system for an ultrafine grinding mill for kaolin, characterized in that, include: The start-up stall control module is used to determine if the main shaft rotates no more than a set number of revolutions after the set time has elapsed during startup. In this case, it outputs a stop main motor command to control the ultrafine grinding machine to stop starting. The operation control module is used to collect the operating current of the ultrafine grinding mill in real time during operation. It analyzes the collected operating current based on a model of the main motor operating current under different factors to determine the specific gravity of the slurry inside the mill. When fluctuations in the slurry specific gravity are detected, it automatically controls the start and stop of the slurry inlet valve and the water replenishment valve, automatically adjusting the slurry specific gravity inside the mill to the optimal range. These different factors include: equipment mechanical failure, fluctuations in slurry specific gravity, replenishment of grinding media, and grinding media loss. The automatic control of the slurry inlet valve and the water replenishment valve when fluctuations in slurry specific gravity are detected specifically includes the following steps: if the slurry specific gravity is determined to increase, the water replenishment valve is automatically activated for dilution; if the slurry specific gravity is determined to decrease, the slurry inlet valve is automatically closed.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the steps of the operation control method for an ultrafine grinding mill for kaolin as described in any one of claims 1 to 7.

10. A storage medium comprising a stored program that, when the program is executed, controls a device in which the storage medium is located to perform the steps of the operation control method for an ultrafine grinding mill for kaolin as described in any one of claims 1 to 7.

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