Operation control method and system for superfine grinding machine for kaolin, electronic equipment and storage medium

Abstract

The invention discloses an operation control method and system for an ultrafine grinder for kaolin, electronic equipment and a storage medium, and the control method comprises the following steps: S1, during starting, when timing reaches a set time length, if the rotation of a main shaft does not exceed a set number of turns, judging that the ultrafine grinder is started and stalled, outputting an instruction for stopping a main motor, and if the rotation of the main shaft does not exceed the set number of turns, stopping the main motor; controlling the superfine mill to stop starting; s2, during operation, the operation current of the ultrafine mill is collected in real time, the collected operation current of the ultrafine mill is analyzed according to an operation current model of a main motor of the ultrafine mill under the influence of different factors, the specific gravity condition of slurry in a barrel is judged, and when it is found that the specific gravity of the slurry fluctuates, a slurry inlet valve and a water supplementing valve are controlled to be started and stopped; the specific gravity of the slurry in the barrel is automatically adjusted to be in an optimal range. On one hand, locked-rotor during starting is avoided, on the other hand, the specific gravity of the slurry is automatically adjusted to be within the optimal range in the operation process, and the phenomena of slurry overflowing and locked-rotor caused by fluctuation change of the specific gravity of the slurry in the operation process are avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of grinders, and in particular to an operation control method, system, electronic equipment and storage medium for an ultrafine grinder for kaolin. Background Art

[0002] Coal-based kaolin is a non-metallic mineral resource with advantages in my country. The calcined kaolin modified by ultrafine processing and high-temperature calcination is widely used in paints, papermaking, rubber, cables, ceramics, high-strength cement and other fields due to its high whiteness, good crystal shape, large porosity, low bulk density, good chemical stability and insulation, strong covering power and other characteristics. In the production of calcined kaolin, the raw ore needs to be ground into ultrafine powder with a particle size of about -2μ94% (6000 mesh) before calcination. To achieve such a small particle size, it needs to go through many processes such as coarse breaking, coarse grinding, fine grinding, etc. In the fine grinding process, the raw ore slurry (solid content 50-52%) with a fine grinding size of less than 325 mesh and the chemical dispersant are mixed and proportioned, and the ultrafine slurry of about -2μ94% (6000 mesh) is ground into the next process for drying through the grinding medium-ceramic beads in the fine grinding equipment. The ultrafine grinding machine adopts the grinding method of slurry inlet at the bottom and slurry outlet at the top. The slurry and grinding media are mixed together and driven by the stirring blades to rotate in the cylinder to achieve the grinding effect. The distribution of the grinding media in the slurry directly affects the grinding efficiency. Under different slurry specific gravity, the distribution of the grinding media in the cylinder is as follows: Figure 1 shown.

[0003] When the specific gravity of the slurry is not much different from that of the grinding medium, the grinding medium is evenly distributed, the working current of the ultrafine mill fluctuates slightly around the normal working current value, and the grinding effect is optimal. When the specific gravity of the slurry is greater than that of the grinding medium, it accumulates at the slurry outlet under the action of buoyancy, the motor load is reduced, the current becomes smaller, the grinding efficiency is reduced, and the slurry outlet is blocked to cause overflow. When the specific gravity of the slurry is less than that of the grinding medium, the grinding medium is deposited at the lower part of the cylinder under the action of gravity, which reduces the grinding efficiency, increases the grinding resistance, increases the motor load, and increases the current. In severe cases, the operating current exceeds the motor protection current and trips, resulting in abnormal shutdown. The working current curve of the ultrafine mill under different slurry specific gravity is as follows Figure 2 shown.

[0004] At present, the moisture content of the slurry is strictly controlled in the front-end process, and the specific gravity of the slurry fed into the ultra-fine grinding machine is controlled to ensure the normal working condition of the ultra-fine grinding machine. When the specific gravity of the slurry is unstable, it needs to be adjusted by artificial water dilution, and there are uncertain factors such as excessive water replenishment.

[0005] When the ultrafine grinding machine is restarted after shutdown, it is considered a heavy-load start because the cylinder is filled with a mixture of slurry and grinding media. If the shutdown time is long or the previous shutdown is abnormal, the grinding media in the cylinder will sink and the lower grinding blades will be wrapped by the grinding media. In severe cases, the motor will be blocked when starting.

[0006] In summary, the existing ultrafine grinding machine has the following problems during operation:

[0007] 1. During the shutdown and restart process of the ultra-fine grinding machine, it is impossible to quickly determine whether the motor is blocked at startup, which may directly lead to the electrical protection of the equipment and endanger the safety of the equipment.

[0008] 2. It relies heavily on the stability of the previous slurry preparation process, such as manual water dilution and other adjustments. Once the previous process goes wrong, the slurry density will be too large or too small, which will lead to reduced grinding efficiency. In particular, when the slurry density is too small, the current during motor operation will exceed the motor protection current and trip, endangering the safe use of the motor reducer. Abnormal shutdown will also cause the machine to easily stall when restarted next time. Summary of the invention

[0009] In response to the above technical problems, the present application provides an operation control method for an ultrafine grinder for kaolin to solve the technical problems that the current ultrafine grinder cannot check motor stalling during startup and overflow and stalling caused by changes in slurry specific gravity during operation.

[0010] This application is implemented through the following scheme:

[0011] A method for controlling the operation of a superfine grinding machine for kaolin comprises the following steps:

[0012] S1, during startup, when the timing reaches the set time, if the main shaft does not rotate more than the set number of revolutions, it is judged that the ultrafine mill is blocked at startup, and a command to stop the main motor is output to control the ultrafine mill to stop starting;

[0013] S2. During operation, the operating current of the ultrafine mill is collected in real time, and the collected operating current of the ultrafine mill is analyzed according to the operating current model of the ultrafine mill main motor under the influence of different factors to judge the slurry density in the cylinder, and when the slurry density fluctuates, the slurry inlet valve and the water supply valve are controlled to start and stop, and the slurry density in the cylinder is automatically adjusted to be within the optimal range; wherein, the different factors include: equipment mechanical failure, slurry density fluctuation, grinding medium replenishment, and grinding medium loss.

[0014] Furthermore, the step S1 specifically includes the steps of:

[0015] S11. When the system detects that the ultrafine grinding machine starts to run, the spindle speed measuring device is used to check the number of rotations of the spindle and start timing, wherein the spindle speed measuring device includes four metal blocks protruding from the spindle evenly installed along the circumferential direction on the outer peripheral wall of the spindle, a proximity switch arranged opposite to the metal block, 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 stored in the pulse counter. When the spindle rotates one circle, 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 mill is blocked at startup, and a main motor stop command is output, and the ultrafine mill stops starting.

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

[0018] S21, measuring and obtaining the main motor current curve under the influence of different factors in the set grinding cycle to obtain the ultrafine mill main motor operating current model under the influence of different factors, wherein the different factors include: equipment mechanical failure, slurry specific gravity fluctuation, grinding medium supplementation, grinding medium loss;

[0019] S22, calculating the real-time collected operating current of the main motor of the ultrafine mill to obtain the minute average of the operating current of the main motor of the ultrafine mill within one minute before the current moment;

[0020] S23, obtaining the growth or decrease trend of the minute average value of the ultrafine grinding mill operating current within the set program cycle;

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

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

[0023] The main motor operating current fluctuation curve caused by grinding medium loss in one grinding cycle, the main motor operating current fluctuation curve caused by replenishing grinding medium; the main motor operating current fluctuation curve after the mechanical failure of the equipment causes the equipment to shut down for protection; the main motor operating current fluctuation curve in the first grinding cycle and the second grinding cycle when the slurry specific gravity is too large; the main motor operating current fluctuation curve in the first grinding cycle and the second grinding cycle when the slurry specific gravity is too small; Among them, the main motor operating current change caused by the fluctuation of the slurry specific gravity is continuous and changes at a uniform speed with the same trend in the first grinding cycle.

[0024] Furthermore, the step S22 specifically includes the steps of:

[0025] S221, the system first defines an array data[1..60] containing 60 data. If the main motor start signal is not detected, all the array data are set to 0. If the main motor start signal is detected, the program will loop through steps S222 to S223 once per second;

[0026] S222, recursively assign values ​​to the array data in sequence, discard the data of the original data

[60] , assign the data of the original data

[59] to data

[60] , assign the data of the original data

[58] to data

[59] , and so on, until the data of the original data[1] is assigned to data[2], and the current operating current of the main motor of the ultrafine grinding machine is assigned to data[1], so that the array stores 60 real-time current data collected every second within one minute before the current moment;

[0027] S223, calculating the average value of the array after recursive assignment in sequence, and obtaining the minute average value Iave of the current operating current of the main motor of the ultrafine grinding mill.

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

[0029] S231, if the main motor is not running or the slurry inlet valve is not opened, the minute average value Ic of the operating current of the main motor of the ultrafine grinding mill in the previous cycle, the number of cycles n in the cycle, the number of current increases n1 in the cycle, the number of current decreases n2 in the cycle, the number of program cycles of continuous current increase zj, and the number of program cycles of continuous current decrease jx are all set to 0;

[0030] S232, when it is detected that the main motor is running and the pulp inlet valve is open, it is determined whether the minute average value Ic of the main motor running current of the ultrafine mill in the previous cycle is 0. If Ic is 0, the minute average value Iave of the main motor running current of the ultrafine mill is assigned to Ic, the number of cycles n in the cycle is increased by 1, and the next cycle is waiting to start. If Ic is not 0, step S233 is executed;

[0031] S233, compare the difference between the current minute average value Iave of the main motor running current of the ultrafine mill and the minute average value Ic of the main motor running current of the ultrafine mill in the previous cycle with the preset current fluctuation range Ip allowed for normal operation of the ultrafine grinding machine, wherein:

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

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

[0034] Determine whether n1 is greater than 3. If n1 is greater than 3, the number of program cycles zj of continuous current increase is increased by 1, n1 is set to 0, jx is set to 0, and then step S234 is executed; if n1 is less than 3, jx is set to 0, and then step S234 is executed;

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

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

[0037] The number of times the current decreases during the cycle is n2 plus 1;

[0038] Determine whether n2 is greater than 3. If n2 is greater than 3, the number of program cycles jx of continuous current reduction is increased by 1.

[0039] Set n2 to 0, zj to 0, and then execute step S234; if n2 is less than 3, zj is set to 0,

[0040] Then execute step S234;

[0041] S234, assigning the current minute average value Iave of the operating current of the main motor of the ultrafine mill to the minute average value Ic of the operating current of the main motor of the ultrafine mill in the previous cycle;

[0042] S235. Determine whether the number of loops n in the cycle is less than 5. If not, add 1 to the number of loops n in the cycle, end the current program cycle, wait for one minute and continue to start the next program cycle from step S231; if so, set n to 1, set the number of current increases n1 and the number of current decreases n2 in the cycle to 0, end the current program cycle, wait for one minute and continue to start the next program cycle from step S231.

[0043] Furthermore, the step S24 specifically includes the steps of:

[0044] S241, comparing the growth or decrease trend of the minute average value of the operating current of the superfine mill main motor within the set program cycle with the operating current model of the superfine mill main motor under the influence of the fluctuation of the slurry specific gravity;

[0045] S242. If the minute average value of the operating current of the main motor of the ultrafine grinding mill shows a decreasing trend, it is judged that the slurry specific gravity increases, and the following steps are performed:

[0046] If the main engine is in operation, the slurry inlet valve is in the open state, and the average minute current of the ultrafine mill is less than the normal current upper limit Imax of the ultrafine mill main motor when it is working, which is set by the operator according to the process requirements, and the number of program cycles of continuous current reduction zj is greater than or equal to 3, open the water supply solenoid valve to add water to the cylinder for dilution, otherwise close the water supply solenoid valve and issue an alarm to remind the operator to pay attention to the high specific gravity of the slurry, and the previous process is needed to stabilize the specific gravity of the slurry;

[0047] As the water supply solenoid valve is opened, the slurry in the cylinder is diluted, the specific gravity decreases, the grinding medium changes its floating trend, and the ultrafine mill operating current increases. At the end of the program cycle of the ultrafine mill main motor operating current minute average trend judgment process, the number of program cycles of continuous current reduction is set to 0, and the water supply solenoid valve is disconnected; after stopping water supply, if the inlet slurry specific gravity is still high, the ultrafine mill main motor operating current minute average is still in a continuous rising state, and after 3 program cycles, the number of program cycles of continuous current reduction jx is greater than or equal to 3 again, water is added and diluted again, and water is added and diluted repeatedly in this way to avoid the accumulation of grinding media on the top of the cylinder and avoid overflow;

[0048] S243. If the minute average value of the operating current of the main motor of the ultrafine grinding mill shows an increasing trend, it is judged that the slurry specific gravity is reduced, and the following steps are performed:

[0049] If the main engine is in operation, the slurry inlet valve is in open state, and the average current of the ultrafine mill is greater than the upper limit of the normal current Imin of the ultrafine mill main motor when it is working, which is set by the operator according to the process requirements, and the number of program cycles of continuous current increase zj is greater than or equal to 3, an alarm is issued to remind the operator that the slurry specific gravity is too low and the previous process is required to stabilize the slurry specific gravity. At the same time, the slurry inlet valve is closed and the system is in a static refining state. The static refining lasts for the set time. The slurry fineness 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 and high-fineness slurry increases, and the grinding medium adheres to the high-viscosity slurry and no longer sinks. The average minute current of the ultrafine mill main motor decreases and maintains a stable state. At this time, if the previous process has stabilized the slurry specific gravity, the slurry inlet valve is manually opened to continue working. If there is no stable slurry supply, normal shutdown is allowed.

[0050] On the other hand, the present application also provides an operation control system for an ultrafine grinding machine for kaolin, comprising:

[0051] The start-up stall control module is used for starting. When the timing reaches the set time, if the main shaft does not rotate more than the set number of revolutions, it is judged that the ultrafine mill is started and stalled, and the main motor stop command is output to control the ultrafine mill to stop starting;

[0052] The operation control module is used to collect the operating current of the ultrafine mill in real time during operation, analyze the collected operating current of the ultrafine mill according to the operating current model of the ultrafine mill main motor under the influence of different factors, judge the slurry density in the cylinder, and automatically control the start and stop of the slurry inlet valve and the water supply valve when the slurry density fluctuates, and automatically adjust the slurry density in the cylinder to be within the optimal range; wherein, the different factors include: equipment mechanical failure, decrease in slurry density, increase in slurry density, replenishment of grinding media, and loss of grinding media.

[0053] On the other hand, the present 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 implements the steps of the method for controlling the operation of the ultrafine grinding machine for kaolin when executing the computer program.

[0054] On the other hand, the present application further provides a storage medium, which includes a stored program, and when the program is run, controls the device where the storage medium is located to execute the steps of the method for controlling the operation of the kaolin ultrafine grinding machine.

[0055] Compared with the prior art, this application has the following beneficial effects:

[0056] The present application provides an operation control method, system, electronic device and storage medium for an ultrafine grinding machine for kaolin. On the one hand, the control method can timely detect the startup stall through the shaft speed measuring device when the ultrafine grinding machine is started, so that the startup stall state can be timely and automatically detected when the ultrafine grinding machine is started, and the startup can be terminated in time before the electrical protection of the equipment is activated to avoid endangering the safety of the equipment; on the other hand, the control method can judge the slurry density in the cylinder by sampling and analyzing the ultrafine grinding machine operating current according to the ultrafine grinding machine working current model and the automatic protection control mechanism, timely discover the fluctuation of the slurry density, and take corresponding measures in time and automatically when the slurry density fluctuates, control the start and stop of the slurry inlet valve and the water supply valve, automatically adjust the slurry density to be within the optimal range, avoid overflow and stall caused by the fluctuation of the slurry density during operation, protect production and equipment safety, and ensure the desired grinding effect.

[0057] In addition to the above-described purposes, features and advantages, the present application also has other purposes, features and advantages. The present application will be further described in detail with reference to the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application.

[0059] Figure 1 It is a schematic diagram of the specific structure of the speed measuring device of the present application.

[0060] Figure 2 It is a schematic diagram of the signal composition of the speed measuring device of the present application.

[0061] Figure 3 It is a schematic diagram of the detection element and the actuator of the present application.

[0062] Figure 4 It is a schematic diagram of the data processing flow of this application.

[0063] Figure 5 It is a schematic flow chart of the operation control method of the ultrafine grinding machine for kaolin according to the preferred embodiment of the present application.

[0064] Figure 6 It is a schematic diagram of the sub-step flow of step S1 of the preferred embodiment of the present application.

[0065] Figure 7 Schematic diagram of the startup stall control process of the preferred embodiment of the present application.

[0066] Figure 8 It is a schematic diagram of the sub-step flow of step S2 of the preferred embodiment of the present application.

[0067] Fig. 9 It is the relationship curve between slurry specific gravity and mill working current.

[0068] Fig.10 It is a schematic diagram of the main motor current curve under the influence of different factors.

[0069] Fig.11 A schematic diagram of the sub-step flow chart of step S22 in the preferred embodiment of the present application.

[0070] Fig.12 A flowchart for calculating the minute average value of the operating current of the superfine grinding machine main motor within one minute before the current moment in a preferred embodiment of the present application.

[0071] Fig.13 It is a flow chart for judging the growth or decrease trend of the minute average value of the ultrafine mill operating current in the preferred embodiment of the present application.

[0072] Fig.14 It is a schematic diagram of the processing flow for determining the increase in the specific gravity of the slurry.

[0073] Fig.15It is a schematic diagram of the main motor operating current curve when the slurry specific gravity increases.

[0074] Fig.16 It is a schematic diagram of the processing flow after judging the reduction of the specific gravity of the slurry.

[0075] Fig.17 It is a schematic diagram of the main motor operating current curve for judging when the slurry specific gravity decreases.

[0076] Fig.18 It is a schematic diagram of the operation control system module of the kaolin ultrafine grinding machine according to the preferred embodiment of the present application.

[0077] Fig.19 It is a schematic block diagram of an electronic device entity of a preferred embodiment of the present application.

[0078] Fig. 20 It is a diagram of the internal structure of a computer device of a preferred embodiment of the present application.

[0079] In the figure: 1. metal block; 2. main shaft; 3. proximity switch; 4. main motor; 5. reducer; 6. coupling; 7. main shaft component; 8. connecting cylinder; 9. slurry discharge device; 10. cylinder; 11. bracket. DETAILED DESCRIPTION

[0080] The embodiments of the present application are described in detail below in conjunction with the accompanying drawings, but the present application can be implemented in a variety of different ways defined and covered below.

[0081] In order to solve the above problems, the present application designs a set of ultrafine mill operation monitoring system and anti-blocking protection device, which automatically detects the blocking phenomenon when the ultrafine mill is started under heavy load to protect the safety of equipment startup. During operation, the slurry density in the cylinder is judged by sampling and analyzing the ultrafine mill operating current, and timely and automatic measures are taken when the inlet slurry density fluctuates to protect production and equipment safety. The system consists of detection elements, data processing units and actuators.

[0082] The detection components include a main motor current transmitter IT and a speed measuring device ST, which can detect parameters such as the operating current of the ultra-fine grinding main motor and the main shaft rotation speed in real time.

[0083] The current transmitter IT converts the 0-5A current signal from the current transformer of the main motor drive device into a 4-20mA standard signal and transmits it to the data processing unit. The speed measuring device ST is a set of devices specially designed for this system to detect the rotation speed of the main shaft. The specific structure and signal composition are shown in Figure 1 and Figure 2 .

[0084] Among them, four metal blocks 1 protruding from the main shaft 2 are evenly installed around the main shaft 2. When the metal block 1 passes the proximity switch 3, the proximity switch 3 generates a pulse signal. When the main shaft 1 rotates one circle, the proximity switch 3 generates four pulse signals.

[0085] The actuator includes the slurry inlet pneumatic valve V1 and the water supply solenoid valve V2. The detection element and the actuator are connected 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 component 7, a connecting cylinder 8, a slurry discharge device 9, a cylinder 10, and a bracket 11 which are sequentially connected.

[0086] Data processing unit: Calculates and processes the data sent by the detection element, and sends the processing results to each execution element to complete the required logical action. The data processing flow of the system is as follows: Figure 4 shown.

[0087] like Figure 5 As shown, the preferred embodiment of the present application provides a method for controlling the operation of a kaolin ultrafine grinding machine, comprising the following steps:

[0088] S1, during startup, when the timing reaches the set time, if the main shaft does not rotate more than the set number of revolutions, it is judged that the ultrafine mill is blocked at startup, and a command to stop the main motor is output to control the ultrafine mill to stop starting;

[0089] S2. During operation, the operating current of the ultrafine mill is collected in real time, and the collected operating current of the ultrafine mill is analyzed according to the operating current model of the ultrafine mill main motor under the influence of different factors to judge the slurry density in the cylinder, and when the slurry density fluctuates, the slurry inlet pneumatic valve and the water supply solenoid valve are controlled to start and stop, and the slurry density in the cylinder is automatically adjusted to be within the optimal range; wherein, the different factors include: equipment mechanical failure, slurry density fluctuation, grinding medium replenishment, and grinding medium loss.

[0090] The present embodiment provides an operation control method for an ultrafine grinding mill for kaolin. On the one hand, the control method can timely detect the startup stall through the shaft speed measuring device when the ultrafine grinding mill is started, so that the startup stall state can be timely and automatically detected when the ultrafine grinding mill is started, and the startup can be terminated in time before the electrical protection of the equipment is activated to avoid endangering the safety of the equipment; on the other hand, the control method can judge the slurry density in the cylinder by sampling and analyzing the operating current of the ultrafine grinding mill according to the working current model of the ultrafine grinding mill and the automatic protection control mechanism, timely discover the fluctuation of the slurry density, and take corresponding measures in time and automatically when the slurry density fluctuates, control the start and stop of the slurry inlet pneumatic valve and the water replenishment solenoid valve, automatically adjust the slurry density to be within the optimal range, avoid overflow and stall caused by the fluctuation of the slurry density during operation, protect the production and equipment safety, and ensure the desired grinding effect.

[0091] Preferably, if Figure 6 and Figure 7 As shown, the step S1 specifically includes the steps of:

[0092] S11, when the system detects that the ultrafine mill starts to run (the rising edge of the ultrafine mill start-stop status signal), the spindle speed measuring device checks the number of spindle rotations and starts timing, wherein the spindle speed measuring device includes four metal blocks protruding from the spindle evenly installed along the circumferential direction on the outer peripheral wall of the spindle, a proximity switch arranged opposite to the metal block, 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 stored in the pulse counter. When the spindle rotates one circle, the proximity switch generates four pulse signals;

[0093] S12. When the timing reaches 2 seconds, if the pulse counter value of the spindle speed measuring device is less than 2 (the spindle rotation does not exceed half a circle), it is judged that the ultrafine grinder is blocked at startup, and a command to stop the main motor is output, and the ultrafine grinder stops starting.

[0094] Preferably, if Figure 8 As shown, the step S2 specifically includes the steps of:

[0095] S21, measuring and obtaining the main motor current curve under the influence of different factors in the set grinding cycle to obtain the ultrafine mill main motor operating current model under the influence of different factors, wherein the different factors include: equipment mechanical failure, slurry specific gravity fluctuation, grinding medium supplementation, grinding medium loss;

[0096] S22, calculating the real-time collected operating current of the main motor of the ultrafine mill to obtain the minute average of the operating current of the main motor of the ultrafine mill within one minute before the current moment;

[0097] S23, obtaining the growth or decrease trend of the minute average value of the ultrafine grinding mill operating current within the set program cycle;

[0098] S24. Compare the growth or decrease trend of the minute average value of the ultrafine mill main motor operating current within the set program cycle with the ultrafine mill main motor operating current model under the influence of the slurry density fluctuation, determine whether there is a change in the slurry density, and execute the corresponding fault handling process when the slurry density fluctuation is found, control the start and stop of the slurry inlet pneumatic valve and the water supply solenoid valve, and automatically adjust the slurry density in the cylinder to be within the optimal range, so as to avoid the ultrafine mill tripping due to exceeding the protection value or slurry overflow.

[0099] Specifically, there are many factors that affect the working current of the ultrafine mill, such as slurry density fluctuation, grinding medium loss and replenishment, equipment mechanical failure, etc. The changes in the working current fluctuation of the ultrafine mill caused by different reasons are different. The current change relationship curve caused by slurry density fluctuation is shown in Fig. 9 , other reasons for current changes are as follows Fig.10 As shown, therefore, in step S21, the main motor current curve under the influence of different factors in the grinding cycle is set (such as Fig.10 The operating current model of the main motor of the ultrafine mill under the influence of different factors is shown in Fig.

[0100] In one grinding cycle (the residence time of the slurry in the cylinder is about 30 minutes as one cycle), the main motor running current fluctuation curve caused by the grinding medium loss, the current drop can be basically ignored; the main motor running current fluctuation curve caused by the replenishment of the grinding medium, the current rise caused by the current rise in a very short time is reflected as a small jump and then remain stable; the main motor running current fluctuation curve after the mechanical failure of the equipment causes the equipment to shut down for protection; the main motor running current fluctuation curve in the first grinding cycle and the second grinding cycle when the slurry specific gravity is too large; the main motor running current fluctuation curve in the first grinding cycle and the second grinding cycle when the slurry specific gravity is too small; among them, the fluctuation of the slurry specific gravity causes the main motor running current to change continuously and uniformly in the same trend in the first grinding cycle. If it is discovered and handled in time within this cycle, it can effectively avoid motor overload tripping and abnormal shutdown.

[0101] Preferably, if Fig.11 and Fig.12 As shown, the step S22 specifically includes the steps of:

[0102] S221, the system first defines an array data[1..60] containing 60 data. If the main motor start signal is not detected, all the array data are set to 0. If the main motor start signal is detected, the program will loop through steps S222 to S223 once per second;

[0103] S222, recursively assign values ​​to the array data in sequence, discard the data of the original data

[60] , assign the data of the original data

[59] to data

[60] , assign the data of the original data

[58] to data

[59] , and so on, until the data of the original data[1] is assigned to data[2], and the current operating current of the main motor of the ultrafine grinding machine is assigned to data[1], so that the array stores 60 real-time current data collected every second within one minute before the current moment;

[0104] S223, calculating the average value of the array after recursive assignment in sequence, and obtaining the minute average value Iave of the current operating current of the main motor of the ultrafine grinding mill.

[0105] In this embodiment, the program is executed once per second, and the minute average value of the ultrafine mill operating current is refreshed once. The minute average value of the ultrafine mill operating current is a value obtained by filtering and smoothing the real-time value of the operating current, and its change more accurately reflects the change trend of the ultrafine mill operating current.

[0106] Preferably, if Fig.13 As shown, the step S23 specifically includes the steps of:

[0107] S231, if the main motor is not running or the slurry inlet pneumatic valve is not open, the minute average value Ic of the operating current of the main motor of the ultrafine grinding mill in the previous cycle, the number of cycles n in the cycle, the number of current increases n1 in the cycle, the number of current decreases n2 in the cycle, the number of program cycles of continuous current increase zj, and the number of program cycles of continuous current decrease jx are all set to 0;

[0108] S232, when it is detected that the main motor is running and the slurry inlet pneumatic valve is open, determine whether the minute average current Ic of the main motor of the ultrafine mill in the previous cycle is 0, if Ic is 0 (the first cycle n = 0), assign the current minute average current Iave of the main motor of the ultrafine mill to Ic, increase the number of cycles n in the cycle by 1 (n = 1), wait for the next cycle to start, and if Ic is not 0, execute step S233;

[0109] S233, compare the difference between the current minute average value Iave of the main motor running current of the ultrafine mill and the minute average value Ic of the main motor running current of the ultrafine mill in the previous cycle with the preset current fluctuation range Ip allowed for normal operation of the ultrafine grinding machine, wherein:

[0110] If the difference is greater than +Ip, perform the following steps:

[0111] a. The number of times the current increases during the cycle n1 plus 1;

[0112] b. Determine whether n1 is greater than 3 (the number of current increases in one program cycle is greater than 3 times). If n1 is greater than 3, the number of program cycles of continuous current increase zj is increased by 1, n1 is set to 0, jx is set to 0, and then step S234 is executed; if n1 is less than 3, jx is set to 0, and then step S234 is executed;

[0113] If the difference is less than +Ip and greater than -Ip, the number of program cycles zj of continuous current increase and the number of program cycles jx of continuous current decrease are both set to 0, and then step S234 is executed;

[0114] If the difference is less than -Ip, perform the following steps:

[0115] a. The number of times the current decreases during the cycle n2 plus 1;

[0116] b. Determine whether n2 is greater than 3 (the number of current increases in one program cycle is greater than 3 times). If n2 is greater than 3, the number of program cycles of continuous current reduction jx is increased by 1, n2 is set to 0, and zj is set to 0.

[0117] Then execute step S234; if n2 is less than 3, zj is set to 0, and then execute step S234;

[0118] S234, assigning the current minute average value Iave of the operating current of the main motor of the ultrafine mill to the minute average value Ic of the operating current of the main motor of the ultrafine mill in the previous cycle;

[0119] S235. Determine whether the number of loops n in the cycle is less than 5. If not, add 1 to the number of loops n in the cycle, end the current program cycle, wait for one minute and continue to start the next program cycle from step S231; if so, set n to 1, set the number of current increases n1 and the number of current decreases n2 in the cycle to 0, end the current program cycle, wait for one minute and continue to start the next program cycle from step S231.

[0120] Preferably, the step S24 specifically includes the steps of:

[0121] S241, comparing the growth or decrease trend of the minute average value of the operating current of the superfine mill main motor within the set program cycle with the operating current model of the superfine mill main motor under the influence of the fluctuation of the slurry specific gravity;

[0122] S242, if the minute average value of the operating current of the superfine grinding machine main motor shows a decreasing trend, it is judged that the slurry specific gravity increases, and the following steps are executed (see Fig.14 ):

[0123] If the main engine is in operation, the slurry inlet pneumatic valve is in the open state, and the ultrafine mill minute average current is less than the normal current upper limit Imax of the ultrafine mill main motor when it is working, which is set by the operator according to the process requirements, and the number of program cycles of continuous current reduction zj is greater than or equal to 3, open the water supply solenoid valve to add water to the cylinder for dilution, otherwise close the water supply solenoid valve and issue an alarm to remind the operator to pay attention to the high specific gravity of the slurry, and the previous process is required to stabilize the specific gravity of the slurry;

[0124] As the water replenishment solenoid valve opens, the slurry in the cylinder is diluted, the specific gravity decreases, the grinding medium changes its floating trend, and the ultrafine mill operating current increases. At the end of the program cycle of the ultrafine mill main motor operating current minute average trend judgment process, the number of program cycles of continuous current reduction is set to 0, and the water replenishment solenoid valve is disconnected (the water replenishment time is 5 minutes); after stopping the water replenishment, if the inlet slurry specific gravity is still high, the ultrafine mill main motor operating current minute average is still in a continuous rising state. After 3 program cycles (15 minutes), the number of program cycles of continuous current reduction jx is greater than or equal to 3 again, and water is replenished and diluted for five minutes again. In this way, water replenishment and dilution are repeated periodically to avoid the accumulation of grinding media on the top of the cylinder and to avoid overflow (see the operating current curve for details). Fig.15 );

[0125] S243, if the minute average value of the operating current of the superfine grinding machine main motor shows an increasing trend, it is judged that the slurry specific gravity is reduced, and the following steps are executed (see Fig.16 ):

[0126] If the main engine is in operation, the slurry inlet pneumatic valve is in the open state, and the ultrafine mill's minute average current is greater than the normal current upper limit Imin of the ultrafine mill's main motor when it is working, which is set by the operator according to the process requirements, and the number of program cycles of continuous current increase zj is greater than or equal to 3, an alarm is issued to remind the operator that the slurry specific gravity is too low and the previous process is required to stabilize the slurry specific gravity. At the same time, the slurry inlet pneumatic valve is closed and the system is in a static refining state. The static refining lasts for about 15 minutes. The slurry fineness 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 and high-fineness slurry increases, and the grinding medium adheres to the high-viscosity slurry and no longer sinks. The minute average current of the ultrafine mill's main motor decreases and maintains a stable state. At this time, if the previous process stabilizes the slurry specific gravity, the slurry inlet pneumatic valve is manually opened to continue working. If there is no stable slurry supply, normal shutdown is allowed. In this shutdown state of high-viscosity slurry, the grinding medium in the cylinder is suspended and will not cause stalling at the next start (see the operating current curve for details). Fig.17 ).

[0127] like Fig.18 As shown, the preferred embodiment of the present application provides an operation control system for an ultrafine grinding machine for kaolin, comprising:

[0128] The start-up stall control module is used for starting. When the timing reaches the set time, if the main shaft does not rotate more than the set number of revolutions, it is judged that the ultrafine mill is started and stalled, and the main motor stop command is output to control the ultrafine mill to stop starting;

[0129] The operation control module is used to collect the operating current of the ultrafine mill in real time during operation, analyze the collected operating current of the ultrafine mill according to the operating current model of the ultrafine mill main motor under the influence of different factors, judge the slurry density in the cylinder, and automatically control the start and stop of the slurry inlet pneumatic valve and the water supply solenoid valve when the slurry density fluctuates, and automatically adjust the slurry density in the cylinder to be within the optimal range; wherein, the different factors include: equipment mechanical failure, decrease in slurry density, increase in slurry density, replenishment of grinding media, and loss of grinding media.

[0130] like Fig.19 As shown, a preferred embodiment of the present 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 implements the steps of the method for controlling the operation of the ultrafine grinding machine for kaolin in the above-mentioned embodiment when executing the computer program.

[0131] like Fig. 20 As shown, the preferred embodiment of the present application also provides a computer device, which can be a terminal or a liveness detection server, and its internal structure diagram can be as shown in Fig. 20 As shown. The computer device includes a processor, a memory and a network interface connected through a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The network interface of the computer device is used to communicate with other external computer devices through a network connection. When the computer program is executed by the processor, the steps of the above-mentioned kaolin ultrafine grinding machine operation control method are implemented.

[0132] Those skilled in the art will understand that Fig. 20 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0133] A preferred embodiment of the present application further provides a storage medium, which includes a stored program, and when the program is executed, controls the device where the storage medium is located to execute the steps of the method for controlling the operation of the ultrafine grinding machine for kaolin in the above embodiment.

[0134] It should be noted that the steps shown in the flowcharts of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and that, although a logical order is shown in the flowcharts, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0135] If the functions described in the method of this embodiment are implemented in the form of software functional units and sold or used as independent products, they can be stored in one or more computing devices readable storage media. Based on this understanding, the part of the embodiment of the present application that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions to enable a computing device (which can be a personal computer, server, mobile computing device or network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program code.

[0136] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can adopt the form of complete hardware embodiments, complete software embodiments, or embodiments in combination with software and hardware. Moreover, the present application can adopt 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.) that contain computer-usable program code. The scheme in the embodiments of the present application can be implemented in various computer languages, for example, object-oriented programming language Java and literal scripting language JavaScript, etc.

[0137] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A system that specifies the functions of a box or multiple boxes.

[0138] These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory produce a product including an instruction system, which is implemented in the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0139] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0140] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0141] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A method for controlling the operation of a superfine grinding machine for kaolin, characterized in that: The following steps are involved: S1, during startup, when the timing reaches the set time, if the main shaft does not rotate more than the set number of revolutions, it is judged that the ultrafine mill is blocked at startup, and a command to stop the main motor is output to control the ultrafine mill to stop starting; S2. During operation, the operating current of the ultrafine mill is collected in real time, and the collected operating current of the ultrafine mill is analyzed according to the operating current model of the ultrafine mill main motor under the influence of different factors to judge the slurry density in the cylinder, and when the slurry density fluctuates, the slurry inlet valve and the water supply valve are controlled to start and stop, and the slurry density in the cylinder is automatically adjusted to be within the optimal range; wherein, the different factors include: equipment mechanical failure, slurry density fluctuation, grinding medium replenishment, and grinding medium loss.

2. The method for controlling the operation of the ultrafine grinding machine for kaolin according to claim 1, characterized in that: The step S1 specifically includes the following steps: S11. When the system detects that the ultrafine grinding machine starts to run, the spindle speed measuring device is used to check the number of rotations of the spindle and start timing, wherein the spindle speed measuring device includes four metal blocks protruding from the spindle evenly installed along the circumferential direction on the outer peripheral wall of the spindle, a proximity switch arranged opposite to the metal block, 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 stored in the pulse counter. When the spindle rotates one circle, 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 mill is blocked at startup, and a main motor stop command is output, and the ultrafine mill stops starting.

3. The method for controlling the operation of the ultrafine grinding machine for kaolin according to claim 2, characterized in that: The step S2 specifically includes the following steps: S21, measuring and obtaining the main motor current curve under the influence of different factors in the set grinding cycle to obtain the ultrafine mill main motor operating current model under the influence of different factors, wherein the different factors include: equipment mechanical failure, slurry specific gravity fluctuation, grinding medium supplementation, grinding medium loss; S22, calculating the real-time collected operating current of the main motor of the ultrafine mill to obtain the minute average of the operating current of the main motor of the ultrafine mill within one minute before the current moment; S23, obtaining the growth or decrease trend of the minute average value of the ultrafine grinding mill operating current within the set program cycle; S24. Compare the growth or decrease trend of the minute average value of the ultrafine mill main motor operating current within the set program cycle with the ultrafine mill main motor operating current model under the influence of the slurry density fluctuation, determine whether there is a change in slurry density, and execute the corresponding fault handling process when the slurry density fluctuation is found, control the start and stop of the slurry inlet valve and the water supply valve, and automatically adjust the slurry density in the cylinder to be within the optimal range.

4. The method for controlling the operation of the ultrafine grinding machine for kaolin according to claim 1, characterized in that: In step S21, the main motor current curve under the influence of different factors in the grinding cycle is set to obtain the ultrafine mill main motor operating current model under the influence of different factors, specifically including: The main motor operating current fluctuation curve caused by grinding medium loss in one grinding cycle, the main motor operating current fluctuation curve caused by replenishing grinding medium; the main motor operating current fluctuation curve after the mechanical failure of the equipment causes the equipment to shut down for protection; the main motor operating current fluctuation curve in the first grinding cycle and the second grinding cycle when the slurry specific gravity is too large; the main motor operating current fluctuation curve in the first grinding cycle and the second grinding cycle when the slurry specific gravity is too small; Among them, the main motor operating current change caused by the fluctuation of the slurry specific gravity is continuous and changes at a uniform speed with the same trend in the first grinding cycle.

5. The method for controlling the operation of the ultrafine grinding machine for kaolin according to claim 1, characterized in that: The step S22 specifically includes the following steps: S221, the system first defines an array data[1..60] containing 60 data. If the main motor start signal is not detected, all the array data are set to 0. If the main motor start signal is detected, the program will loop through steps S222 to S223 once per second; S222, recursively assign values ​​to the array data in sequence, discard the data of the original data[60], assign the data of the original data[59] to data[60], assign the data of the original data[58] to data[59], and so on, until the data of the original data[1] is assigned to data[2], and the current operating current of the main motor of the ultrafine grinding machine is assigned to data[1], so that the array stores 60 real-time current data collected every second within one minute before the current moment; S223, calculating the average value of the array after recursive assignment in sequence, and obtaining the minute average value Iave of the current operating current of the main motor of the ultrafine grinding mill.

6. The method for controlling the operation of the ultrafine grinding machine for kaolin according to claim 1, characterized in that: The step S23 specifically includes the following steps: S231, if the main motor is not running or the slurry inlet valve is not opened, the minute average value Ic of the operating current of the main motor of the ultrafine grinding mill in the previous cycle, the number of cycles n in the cycle, the number of current increases n1 in the cycle, the number of current decreases n2 in the cycle, the number of program cycles of continuous current increase zj, and the number of program cycles of continuous current decrease jx are all set to 0; S232, when it is detected that the main motor is running and the pulp inlet valve is open, it is determined whether the minute average value Ic of the main motor running current of the ultrafine mill in the previous cycle is 0. If Ic is 0, the minute average value Iave of the main motor running current of the ultrafine mill is assigned to Ic, the number of cycles n in the cycle is increased by 1, and the next cycle is waiting to start. If Ic is not 0, step S233 is executed; S233, compare the difference between the current minute average value Iave of the main motor running current of the ultrafine mill and the minute average value Ic of the main motor running current of the ultrafine mill in the previous cycle with the preset current fluctuation range Ip allowed for normal operation of the ultrafine grinding machine, wherein: If the difference is greater than +Ip, perform the following steps: The number of times the current increases during the cycle is n1 plus 1; Determine whether n1 is greater than 3. If n1 is greater than 3, the number of program cycles zj of continuous current increase is increased by 1, n1 is set to 0, jx is set to 0, and then step S234 is executed; if n1 is less than 3, jx is set to 0, and then step S234 is executed; If the difference is less than +Ip and greater than -Ip, the number of program cycles zj of continuous current increase and the number of program cycles jx of continuous current decrease are both set to 0, and then step S234 is executed; If the difference is less than -Ip, perform the following steps: The number of times the current decreases during the cycle is n2 plus 1; Determine whether n2 is greater than 3. If n2 is greater than 3, the number of program cycles jx of continuous current reduction is increased by 1, n2 is set to 0, zj is set to 0, and then step S234 is executed; if n2 is less than 3, zj is set to 0, Then execute step S234; S234, assigning the current minute average value Iave of the operating current of the main motor of the ultrafine mill to the minute average value Ic of the operating current of the main motor of the ultrafine mill in the previous cycle; S235. Determine whether the number of loops n in the cycle is less than 5. If not, add 1 to the number of loops n in the cycle, end the current program cycle, wait for one minute and continue to start the next program cycle from step S231; if so, set n to 1, set the number of current increases n1 and the number of current decreases n2 in the cycle to 0, end the current program cycle, wait for one minute and continue to start the next program cycle from step S231.

7. The method for controlling the operation of the ultrafine grinding machine for kaolin according to claim 1, characterized in that: The step S24 specifically includes the following steps: S241, comparing the growth or decrease trend of the minute average value of the operating current of the superfine mill main motor within the set program cycle with the operating current model of the superfine mill main motor under the influence of the fluctuation of the slurry specific gravity; S242. If the minute average value of the operating current of the main motor of the ultrafine grinding mill shows a decreasing trend, it is judged that the slurry specific gravity increases, and the following steps are performed: If the main engine is in operation, the slurry inlet valve is in the open state, and the average minute current of the ultrafine mill is less than the normal current upper limit Imax of the ultrafine mill main motor when it is working, which is set by the operator according to the process requirements, and the number of program cycles of continuous current reduction zj is greater than or equal to 3, open the water supply solenoid valve to add water to the cylinder for dilution, otherwise close the water supply solenoid valve and issue an alarm to remind the operator to pay attention to the high specific gravity of the slurry, and the previous process is needed to stabilize the specific gravity of the slurry; As the water supply solenoid valve is opened, the slurry in the cylinder is diluted, the specific gravity decreases, the grinding medium changes its floating trend, and the ultrafine mill operating current increases. At the end of the program cycle of the ultrafine mill main motor operating current minute average trend judgment process, the number of program cycles of continuous current reduction is set to 0, and the water supply solenoid valve is disconnected; after stopping water supply, if the inlet slurry specific gravity is still high, the ultrafine mill main motor operating current minute average is still in a continuous rising state, and after 3 program cycles, the number of program cycles of continuous current reduction jx is greater than or equal to 3 again, water is added and diluted again, and water is added and diluted repeatedly in this way to avoid the accumulation of grinding media on the top of the cylinder and avoid overflow; S243. If the minute average value of the operating current of the main motor of the ultrafine grinding mill shows an increasing trend, it is judged that the slurry specific gravity is reduced, and the following steps are performed: If the main engine is in operation, the slurry inlet valve is in open state, and the average current of the ultrafine mill is greater than the upper limit of the normal current Imin of the ultrafine mill main motor when it is working, which is set by the operator according to the process requirements, and the number of program cycles of continuous current increase zj is greater than or equal to 3, an alarm is issued to remind the operator that the slurry specific gravity is too low and the previous process is required to stabilize the slurry specific gravity. At the same time, the slurry inlet valve is closed and the system is in a static refining state. The static refining lasts for the set time. The slurry fineness 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 and high-fineness slurry increases, and the grinding medium adheres to the high-viscosity slurry and no longer sinks. The average minute current of the ultrafine mill main motor decreases and maintains a stable state. At this time, if the previous process has stabilized the slurry specific gravity, the slurry inlet valve is manually opened to continue working. If there is no stable slurry supply, normal shutdown is allowed.

8. An operation control system for an ultrafine grinding machine for kaolin, characterized in that: include: The start-up stall control module is used for starting. When the timing reaches the set time, if the main shaft does not rotate more than the set number of revolutions, it is judged that the ultrafine mill is started and stalled, and the main motor stop command is output to control the ultrafine mill to stop starting; The operation control module is used to collect the operating current of the ultrafine mill in real time during operation, analyze the collected operating current of the ultrafine mill according to the operating current model of the ultrafine mill main motor under the influence of different factors, judge the slurry density in the cylinder, and automatically control the start and stop of the slurry inlet valve and the water supply valve when the slurry density fluctuates, and automatically adjust the slurry density in the cylinder to be within the optimal range; wherein, the different factors include: equipment mechanical failure, decrease in slurry density, increase in slurry density, replenishment of grinding media, and loss of grinding media.

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, the steps of the method for controlling the operation of the ultrafine grinding machine for kaolin according to any one of claims 1 to 7 are implemented.

10. A storage medium, comprising a stored program, which controls a device where the storage medium is located to execute the steps of the method for controlling the operation of a kaolin ultrafine grinding machine as claimed in any one of claims 1 to 7 when the program is executed.

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