A controllable electromagnetic direct drive ball and rod mill

Abstract

The present application relates to the technical field of ball mill, in particular to a controllable electromagnetic direct drive ball and rod mill, comprising: drive mechanisms are arranged at both ends or the middle of the ball mill body; the electromagnetic direct drive ball mill is provided with a controllable system, comprising: an online acquisition module: obtaining characteristic data of ore powder in the ball mill body; an online analysis module: analyzing and calculating according to the characteristic data of ore powder, outputting ball mill performance value, and judging whether the generated ball mill is qualified or not; a ball mill control module: controlling the rotating speed of the ball mill according to the generated ball mill control signal; the present application utilizes the arbitrary control of the speed ratio of the electromagnetic direct drive motor, so that the ball mill can give reasonable rotating speed according to the requirements of the required product during dealing with different ore powder, thus changing the uncontrollable shortcomings of traditional drive, and at the same time, the arbitrary control of the rotating speed can adapt to the product fineness modulus requirements of any raw ore, and the energy saving and effective loss reduction purposes are achieved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of ball mills, in particular to an electromagnetic direct-drive ball mill with adjustable control. BACKGROUND

[0002] The electromagnetic direct-drive ball mill is a device for directly driving the rotation of a ball mill cylinder by electromagnetic force, and the working principle of the electromagnetic direct-drive ball mill is mainly based on electromagnetic induction and electromagnetic force driving. It eliminates the traditional speed reducer and coupling, and directly drives the rotation of the ball mill cylinder by electromagnetic force. However, due to the relatively small application of electromagnetic direct-drive technology in the field of ball mills, the technical details and performance parameters may vary depending on the manufacturer and design;

[0003] In the prior art, the structure of the traditional asynchronous motor-driven speed reducer and transmission ball mill cannot adjust the reasonable rotating speed during the grinding of different ores, so the driving of the traditional ball mill has the disadvantage of being uncontrollable. SUMMARY

[0004] The purpose of the application is to provide an electromagnetic direct-drive ball mill with adjustable control, which solves the technical problem that the structure of the traditional asynchronous motor-driven speed reducer and transmission ball mill cannot adjust the reasonable rotating speed during the grinding of different ores, so the driving of the traditional ball mill has the disadvantage of being uncontrollable.

[0005] The purpose of the application can be achieved by the following technical solutions:

[0006] An electromagnetic direct-drive ball mill with adjustable control, comprising:

[0007] A ball mill body, both ends or the middle part of the ball mill body are provided with a driving mechanism, and the driving mechanism can adopt a built-in driving motor;

[0008] In addition, both ends of the ball mill body are provided with a feeding port and a discharging port, and both ends of the ball mill body are provided with a bearing seat;

[0009] An adjustable control system is arranged in the electromagnetic direct-drive ball mill, and the adjustable control system comprises:

[0010] An online acquisition module: obtaining characteristic data of ore grinding in the ball mill body;

[0011] The characteristic data includes ore raw material particle size data;

[0012] An online analysis module: analyzing and calculating the characteristic data of ore grinding, outputting a ball mill performance value, judging the ball mill performance value, and generating a ball mill qualification signal;

[0013] The ball mill qualification signal includes a ball mill qualification signal or a ball mill unqualification signal;

[0014] Ball mill control module: controls the speed of the ball mill according to the generated ball mill control signal.

[0015] As a further solution of the present invention: the output process of the ball milling performance value is:

[0016] Obtain the particle size data of the ore raw material at each time point during the ball milling time, analyze and obtain the static particle size deviation value and the dynamic particle size deviation value, and compare the static particle size deviation value with the dynamic particle size deviation value to obtain the ball milling performance value.

[0017] As a further solution of the present invention: if the ball milling performance value is greater than or equal to the ball milling performance threshold, a ball milling failure signal is generated;

[0018] If the ball milling performance value is less than the ball milling performance threshold, a ball milling qualified signal is generated.

[0019] As a further solution of the present invention: the static particle size deviation value is obtained as follows:

[0020] Obtain the ore raw material particle size data of the current time node and the preset ore raw material particle size data, perform difference calculation on the ore raw material particle size data of the current time node and the preset ore raw material particle size data, obtain the ore raw material particle size difference of the current time node, and mark it as the static particle size deviation value.

[0021] As a further solution of the present invention: the dynamic particle size deviation value is obtained as follows:

[0022] Get the particle size value of the current time node and the particle size value of the previous time node in the historical period, calculate the difference between the particle size value of the current time node and the particle size value of the previous time node in the historical period, and obtain the dynamic particle size deviation value of the time node, which is marked as the dynamic particle size deviation value.

[0023] As a further solution of the present invention: when a ball milling qualified signal is obtained, the particle size data of the ore raw material is obtained, and the particle size data of the ore raw material is compared with the particle size data of the ore raw material required at the process end time;

[0024] If the particle size data of the ore raw material reaches the particle size data of the ore raw material required by the process end time, a ball mill stop signal is generated;

[0025] If the particle size data of the ore raw material does not reach the particle size data of the ore raw material required by the process end time, a signal for the ball mill to continue working is generated.

[0026] As a further solution of the present invention: when a ball milling failure signal is obtained, a ball mill control signal is generated. When the ball mill control signal is generated, the signal is sent to the controller of the ball mill to control the operation of the ball mill.

[0027] As a further scheme of the present application: when the ball mill regulation signal is obtained, the particle size value of the current time node and the particle size value of each time node in the historical period are acquired, the particle size value of the current time node is subtracted from the particle size value of each time node in the historical period, and the time difference particle size value of each time node is obtained;

[0028] A two-dimensional coordinate system is constructed with the time node as the X axis and the time difference particle size value as the Y axis, the time difference particle size value of each time node is substituted into the two-dimensional coordinate system, and a time difference particle size curve is drawn; wherein the two-dimensional coordinate system is pre-provided with a standard time difference particle size curve;

[0029] The time difference particle size curve and the pre-provided standard time difference particle size curve are constructed into a closed figure, the area of the closed figure is acquired, and is marked as a time difference particle size deviation value;

[0030] If the time difference particle size deviation value is greater than or equal to the time difference particle size deviation threshold value, a ball mill stability low signal is generated.

[0031] As a further scheme of the present application: when the ball mill stability low signal is obtained, the maximum point of the difference value between the time difference particle size curve and the pre-provided standard time difference particle size curve is acquired, and is marked as a second dynamic particle size deviation value, which is marked as ZPD2, and the ball mill adjustment power PTg is calculated through the formula ; wherein CLd is the ore raw material particle size difference value of the current time node.

[0032] As a further scheme of the present application: the acquisition process of the ore raw material particle size difference value of the current time node is as follows:

[0033] The ore raw material particle size data of the current time node and the pre-provided ore raw material particle size data are acquired, and the ore raw material particle size data of the current time node and the pre-provided ore raw material particle size data are subtracted to obtain the ore raw material particle size difference value of the current time node.

[0034] The present application has the following beneficial effects:

[0035] (1) The application utilizes electromagnetic direct drive motor to directly install gear or directly drive the ball mill barrel, changes the structure of traditional asynchronous motor driving reducer and then driving the ball mill. Advantage description: reduces the overload of reducer, makes the equipment run more smoothly, changes the power loss caused by overload, achieves the purpose of energy saving. The arbitrary control of speed ratio of electromagnetic direct drive motor makes the ball mill respond to different ore grinding, and the reasonable speed can be given according to the requirements of the required product, so as to change the uncontrolled shortcomings of traditional driving, and because the speed is arbitrarily controlled, it can adapt to the product fineness modulus requirements of any raw ore, and achieve the purposes of energy saving and effectively reducing loss. When facing the high energy consumption of large ball mill, electromagnetic direct drive motor can be installed at both ends of the ball mill, which changes the shortcomings of traditional motor out of synchronization and high energy consumption caused by excessive torque of traditional motor;

[0036] (2) The application obtains the characteristic data of ore grinding in the ball mill; analyzes and calculates according to the characteristic data of ore grinding, outputs the ball mill performance value, judges according to the ball mill performance value, and generates a ball mill qualification signal; according to the ball mill qualification signal, the ball mill executes corresponding work; according to the generated ball mill control signal, the speed of the ball mill is controlled; the application analyzes the data according to the real-time change of ore grinding in the ball mill, realizes real-time monitoring of the current ball mill work, adjusts the ball mill power in time when an exception occurs, and is suitable for ore grinding in different states. BRIEF DESCRIPTION OF DRAWINGS

[0037] The application will be further described below in combination with the drawings.

[0038] Figure 1 is a structural schematic diagram of the first driving mode of the electromagnetic direct drive ball mill of the application;

[0039] Figure 2 is a structural schematic diagram of the second driving mode of the electromagnetic direct drive ball mill of the application;

[0040] Figure 3 is a structural schematic diagram of the connection relationship between the electromagnetic direct drive motor and the ball mill barrel of the electromagnetic direct drive ball mill of the application;

[0041] Figure 4 is a system block diagram of the controllable system of the application.

[0042] In the figure: 1, ball mill barrel; 2, driving mechanism; 3, feed inlet; 4, discharge outlet; 5, bearing seat; 6, electromagnetic direct drive motor installation position. DETAILED DESCRIPTION

[0043] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0044] Embodiment 1

[0045] As shown in Figure 1 and Figure 2 The present application is a controllable electromagnetic direct drive ball mill, which comprises:

[0046] A ball mill body 1, drive mechanisms 2 are arranged at both ends or the middle of the ball mill body 1, the drive mechanisms can adopt built-in drive motors, and the bottom of the drive mechanism 2 is provided with an electromagnetic direct drive motor mounting position 6;

[0047] In addition, the ball mill body 1 is respectively provided with a feed inlet 3 and a discharge outlet 4 at both ends, and the ball mill body is provided with a bearing seat 5 at both ends;

[0048] The technical solution of the embodiment of the present application: the electromagnetic direct drive motor is directly installed with a gear or directly drives the ball mill cylinder, changing the structure of the traditional asynchronous motor drive reducer and the transmission of the ball mill. Advantage explanation: reducing the overload of the speed reducer makes the equipment run more smoothly, and changing the power loss caused by overload achieves the purpose of energy saving. Using the arbitrary control of the speed ratio of the electromagnetic direct drive motor, the ball mill can be simply given a reasonable speed according to the requirements of the required product during grinding different ores, so as to change the uncontrollable shortcomings of the traditional drive, and effectively reduce the loss due to the arbitrary control of the speed. In the face of high energy consumption of large ball mills, electromagnetic direct drive motors can be installed at both ends of the ball mill to change the shortcomings of the traditional motor out of synchronization and the high energy consumption caused by the large torque of the traditional motor.

[0049] Embodiment 2

[0050] As shown in Figure 4 The electromagnetic direct drive ball mill is provided with a controllable system, and the controllable system comprises:

[0051] An online acquisition module: acquiring characteristic data of ore grinding in the ball mill body;

[0052] The characteristic data includes ore raw material particle size data;

[0053] In some embodiments, when the ball mill body grinds the ore raw material, the ore raw material in the ball mill body is collected to obtain the ore raw material particle size data;

[0054] Specifically, the ore raw material in the ball mill body is collected:

[0055] An image processing device is arranged in the ball mill body, and the image processing device is used to shoot the ore raw material being ground in real time in the ball mill body. The image processing device identifies and segments the ore image. The image analysis device extracts the edge contour of the segmented ore image and fits and calculates the ore particle size. This is a common technology, and a dynamic sand particle size detection device based on computer vision disclosed in CN217520973U can be referred to for details.

[0056] An online analysis module analyzes and calculates according to the characteristic data of the ore powder, outputs a ball milling performance value, judges according to the ball milling performance value, and generates a ball milling qualification signal.

[0057] The ball milling qualification signal includes a ball milling qualification signal or a ball milling unqualification signal.

[0058] In some embodiments, the ore raw material particle size data collected by the online collection module is obtained for analysis, and the specific process is as follows:

[0059] The ore raw material particle size data of each time node in the ball milling time is obtained, and the static particle size deviation value and the dynamic particle size deviation value are analyzed. The static particle size deviation value and the dynamic particle size deviation value are compared to obtain a ball milling performance value.

[0060] The ball milling performance value is compared with a ball milling performance threshold value.

[0061] If the ball milling performance value is greater than or equal to the ball milling performance threshold value, it indicates that the degree of ore grinding by the ball mill at the current time node is greatly different from the actual process required grinding degree, which does not meet the actual ball milling process requirement, and a ball milling unqualification signal is generated.

[0062] If the ball milling performance value is less than the ball milling performance threshold value, it indicates that the degree of ore grinding by the ball mill at the current time node is less different from the actual process required grinding degree, which meets the actual ball milling process requirement, and a ball milling qualification signal is generated.

[0063] Specifically, the static particle size deviation value is obtained in the following manner:

[0064] The ore raw material particle size data of the current time node and the preset ore raw material particle size data (previously set by the technical personnel according to the process) are obtained. The ore raw material particle size data of the current time node and the preset ore raw material particle size data are subtracted to obtain the ore raw material particle size difference value of the current time node, which is marked as the static particle size deviation value.

[0065] The dynamic particle size deviation value is obtained in the following manner:

[0066] Obtain the particle size value of the current time node and the particle size value of the previous time node in the historical period, perform difference calculation on the particle size value of the current time node and the particle size value of the previous time node in the historical period, and obtain the dynamic particle size deviation value of the time node, which is marked as the dynamic particle size deviation value;

[0067] Ball mill execution module: according to the ball milling qualification signal, the ball mill executes the corresponding work;

[0068] In some embodiments, when a ball milling qualified signal is obtained, the ore raw material particle size data is obtained, and the ore raw material particle size data is compared with the ore raw material particle size data required at the process end time;

[0069] If the particle size data of the ore raw material reaches the particle size data of the ore raw material required by the process end time, a ball mill stop signal is generated; when the ball mill stop signal is generated, the signal is sent to the controller of the ball mill to control the ball mill to stop working;

[0070] If the particle size data of the ore raw material does not reach the particle size data of the ore raw material required by the process end time, a ball mill continuing operation signal is generated; when the ball mill continuing operation signal is generated, this signal is sent to the controller of the ball mill to control the ball mill to continue operation;

[0071] When a ball milling failure signal is obtained, a ball mill control signal is generated. When the ball mill control signal is generated, the signal is sent to the controller of the ball mill to control the operation of the ball mill;

[0072] Ball mill control module: controls the speed of the ball mill according to the generated ball mill control signal;

[0073] In some embodiments, when a ball mill control signal is obtained, the particle size value at the current time node and the particle size value at each time node in the historical period are obtained, and the difference between the particle size value at the current time node and the particle size value at each time node in the historical period is calculated to obtain the time difference particle size value at each time node;

[0074] A two-dimensional coordinate system is constructed with the time node as the X-axis and the time difference particle size value as the Y-axis. The time difference particle size value of each time node is substituted into the two-dimensional coordinate system and a time difference particle size curve is drawn. A standard time difference particle size curve is preset in the two-dimensional coordinate system.

[0075] A closed graph is constructed by combining the time difference particle size curve with a preset standard time difference particle size curve, and the area of ​​the closed graph is obtained and marked as the time difference particle size deviation value;

[0076] Comparing the time difference particle size deviation value with the time difference particle size deviation threshold;

[0077] If the time difference particle size deviation value is greater than or equal to the time difference particle size deviation threshold value, a ball mill stability low signal is generated;

[0078] If the time difference particle size deviation value is greater than or equal to the time difference particle size deviation threshold value, a ball mill stability high signal is generated;

[0079] When the ball mill stability high signal is obtained, a first dynamic particle size deviation value is obtained, which is marked as ZPD1, and the ball mill adjustment power PTg is calculated by the formula ; wherein CLd is the ore raw material particle size difference value of the current time node;

[0080] The ore raw material particle size difference value of the current time node is obtained by the following process:

[0081] The ore raw material particle size data of the current time node and the preset ore raw material particle size data are obtained, and the ore raw material particle size data of the current time node and the preset ore raw material particle size data are difference calculated to obtain the ore raw material particle size difference value of the current time node;

[0082] When the ball mill stability low signal is obtained, the time difference particle size curve and the preset standard time difference particle size curve difference maximum point are obtained, which is marked as the second dynamic particle size deviation value, and is marked as ZPD2, and the ball mill adjustment power PTg is calculated by the formula ; wherein CLd is the ore raw material particle size difference value of the current time node;

[0083] The ore raw material particle size difference value of the current time node is obtained by the following process:

[0084] The ore raw material particle size data of the current time node and the preset ore raw material particle size data are obtained, and the ore raw material particle size data of the current time node and the preset ore raw material particle size data are difference calculated to obtain the ore raw material particle size difference value of the current time node;

[0085] When the ball mill adjustment power PTg is obtained, it is sent to the electromagnetic direct drive motor of the ball mill, so that the electromagnetic direct drive motor works according to the ball mill adjustment power, and the power of the ball mill is adjusted and controlled, which is suitable for the working of ore grinding in different states in the ball mill working process;

[0086] The technical scheme of the embodiment of the present application is: characteristic data of ore powder in the ball mill is acquired; the characteristic data of the ore powder is analyzed and calculated to output a ball milling performance value, and whether the ball milling is qualified is judged according to the ball milling performance value and a ball milling qualified signal is generated; the ball mill performs corresponding work according to the ball milling qualified signal; the rotational speed of the ball mill is regulated according to the generated ball mill regulating signal; the present application analyzes data according to the real-time change of the ore powder in the ball mill, realizes real-time monitoring of the current ball milling work, and timely adjusts the ball milling power when an abnormality occurs, and is suitable for ore powder in different states.

[0087] The above formulas are dimensionless values, and the formulas are obtained by collecting a large amount of data to simulate a formula of the nearest real situation, and the preset parameters in the formula are set by a person skilled in the art according to the actual situation.

[0088] The above describes one embodiment of the present application in detail, but the content described is only a preferred embodiment of the present application and cannot be considered as limiting the scope of the present application. Any equivalent changes and improvements made according to the scope of the present application should still belong to the scope of the present application.

Claims

1. An adjustable electromagnetic direct-drive ball rod mill, characterized in that: include: The ball mill chamber body is provided with a driving mechanism at both ends or in the middle of the ball mill chamber body, and the driving mechanism adopts a built-in driving motor; In addition, a feed port and a discharge port are respectively provided at both ends of the ball mill body, and a bearing seat is provided at both ends of the ball mill body; The electromagnetic direct drive ball mill is equipped with a controllable system, which includes: Online acquisition module: obtains characteristic data of ore grinding in the ball mill; Among them, the characteristic data includes the particle size data of the ore raw materials; The online analysis module analyzes and calculates the characteristic data of ore grinding, outputs the ball milling performance value, and then makes a judgment based on the ball milling performance value and generates a signal whether the ball milling is qualified; The ball milling qualified signal includes a ball milling qualified signal or a ball milling unqualified signal; Ball mill control module: controls the speed of the ball mill according to the generated ball mill control signal; The output process of ball mill performance value is: Obtain the particle size data of the ore raw materials at each time point during the ball milling process, analyze and obtain the static particle size deviation value and the dynamic particle size deviation value, and compare the static particle size deviation value with the dynamic particle size deviation value to obtain the ball milling performance value; If the ball milling performance value is greater than or equal to the ball milling performance threshold, a ball milling failure signal is generated; If the ball milling performance value is less than the ball milling performance threshold, a ball milling qualified signal is generated; The static particle size deviation value is obtained as follows: Obtain the ore raw material particle size data at the current time node and the preset ore raw material particle size data, perform difference calculation on the ore raw material particle size data at the current time node and the preset ore raw material particle size data, obtain the ore raw material particle size difference at the current time node, and mark it as the static particle size deviation value; The dynamic particle size deviation value is obtained as follows: Get the particle size value of the current time node and the particle size value of the previous time node in the historical period, calculate the difference between the particle size value of the current time node and the particle size value of the previous time node in the historical period, and obtain the dynamic particle size deviation value of the time node, which is marked as the dynamic particle size deviation value.

2. The adjustable electromagnetic direct-drive ball rod mill according to claim 1, characterized in that: When a ball milling qualified signal is obtained, the particle size data of the ore raw material is obtained, and the particle size data of the ore raw material is compared with the particle size data of the ore raw material required at the process end time; If the particle size data of the ore raw material reaches the particle size data of the ore raw material required by the process end time, a ball mill stop signal is generated; If the particle size data of the ore raw material does not reach the particle size data of the ore raw material required by the process end time, a signal for the ball mill to continue working is generated.

3. The adjustable electromagnetic direct-drive ball rod mill according to claim 2, characterized in that: When a ball mill unqualified signal is obtained, a ball mill control signal is generated. When the ball mill control signal is generated, the signal is sent to the controller of the ball mill to control the operation of the ball mill.

4. The adjustable electromagnetic direct-drive ball rod mill according to claim 3, characterized in that: When the ball mill control signal is obtained, the particle size value of the current time node and the particle size value of each time node in the historical period are obtained, and the difference between the particle size value of the current time node and the particle size value of each time node in the historical period is calculated to obtain the time difference particle size value of each time node; A two-dimensional coordinate system is constructed with the time node as the X-axis and the time difference particle size value as the Y-axis. The time difference particle size value of each time node is substituted into the two-dimensional coordinate system and a time difference particle size curve is drawn. A standard time difference particle size curve is preset in the two-dimensional coordinate system. A closed graph is constructed by combining the time difference particle size curve with a preset standard time difference particle size curve, and the area of ​​the closed graph is obtained and marked as the time difference particle size deviation value; If the time difference particle size deviation value is greater than or equal to the time difference particle size deviation threshold, a low ball milling stability signal is generated.

5. The adjustable electromagnetic direct-drive ball rod mill according to claim 4, characterized in that: When a low signal of ball milling stability is obtained, the maximum difference point between the time difference particle size curve and the preset standard time difference particle size curve is obtained and marked as the second dynamic particle size deviation value, which is marked as ZPD2. The ball mill adjustment power PTg is calculated; where CLd is the particle size difference of the ore raw materials at the current time node.

6. The adjustable electromagnetic direct-drive ball rod mill according to claim 1, characterized in that: The process of obtaining the particle size difference of the ore raw material at the current time node is as follows: Obtain the ore raw material particle size data of the current time node and the preset ore raw material particle size data, perform difference calculation on the ore raw material particle size data of the current time node and the preset ore raw material particle size data, and obtain the ore raw material particle size difference of the current time node.

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