Adjustable electromagnetic direct-drive ball rod mill

Abstract

The invention relates to the technical field of ball mills, in particular to an adjustable electromagnetic direct-drive ball-rod mill which is characterized in that driving mechanisms are arranged at the two ends or the middle of a ball milling bin body; an adjustable and controllable system is arranged in the electromagnetic direct-drive ball mill and comprises an on-line acquisition module, an on-line control module and an on-line control module, the on-line analysis module is used for carrying out analysis and calculation according to the characteristic data of the milled ore powder, outputting a ball milling performance value and judging whether the generated ball milling is qualified or not; the ball milling regulation and control module is used for regulating and controlling the rotating speed of the ball mill according to the generated ball mill regulation and control signal; according to the invention, the speed ratio of the electromagnetic direct-drive motor is randomly regulated and controlled, so that the ball mill can provide a reasonable rotating speed according to the requirements of a required product during different ore milling periods, the defect that the traditional drive is uncontrollable is overcome, and meanwhile, due to the random regulation and control of the rotating speed, the product fineness modulus requirement corresponding to any raw ore can be met; and meanwhile, the purposes of saving energy and effectively reducing loss are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of ball mills, and particularly to an adjustable electromagnetic direct drive ball rod mill. Background Art

[0002] An electromagnetic direct drive ball mill is a device that directly drives the rotation of the ball mill cylinder using electromagnetic force. The working principle of the electromagnetic direct drive ball mill is mainly based on electromagnetic induction and electromagnetic force drive. It eliminates the traditional speed reducer and coupling, and directly drives the rotation of the ball mill cylinder through electromagnetic force. However, due to the relatively few applications of electromagnetic direct drive technology in the field of ball mills, its 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 driving a speed reducer and then driving the ball mill cannot adjust the speed reasonably during the grinding of different ores. Therefore, the drive of the traditional ball mill has the disadvantage of being uncontrollable. Summary of the Invention

[0004] The purpose of the present invention is to provide an adjustable electromagnetic direct drive ball rod mill. The technical problem solved by the present invention is that the structure of the traditional asynchronous motor driving a speed reducer and then driving the ball mill cannot adjust the speed reasonably during the grinding of different ores. Therefore, the drive of the traditional ball mill has the disadvantage of being uncontrollable.

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

[0006] An adjustable electromagnetic direct drive ball rod mill, comprising:

[0007] A ball milling chamber body, with drive mechanisms provided at both ends or in the middle of the ball milling chamber body. The drive mechanism can adopt an internal drive motor;

[0008] And, a feed inlet and a discharge outlet are respectively provided at both ends of the ball milling chamber body, and bearing seats are provided at both ends of the ball milling chamber body;

[0009] An adjustable system is provided inside the electromagnetic direct drive ball mill, and the adjustable system includes:

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

[0011] Among them, the characteristic data includes ore raw material particle size data;

[0012] An online analysis module, analyzing and calculating according to the characteristic data of the ore grinding powder, outputting a ball milling performance value, then judging according to the ball milling performance value, and generating a signal indicating whether the ball milling is qualified;

[0013] Among them, the signal indicating whether the ball milling is qualified includes a ball milling qualified signal or a ball milling unqualified signal;

[0014] Ball milling control module: According to the generated ball mill control signal, the rotation speed of the ball mill is regulated.

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

[0016] Obtain the particle size data of the ore raw materials at each time node during the ball milling time, analyze to obtain the static particle size deviation value and the dynamic particle size deviation value, take the ratio of the static particle size deviation value to the dynamic particle size deviation value to obtain the ball milling performance value.

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

[0018] When 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 method for obtaining the static particle size deviation value is as follows:

[0020] Obtain the particle size data of the ore raw materials at the current time node and the preset particle size data of the ore raw materials, perform a difference calculation on the particle size data of the ore raw materials at the current time node and the preset particle size data of the ore raw materials to obtain the particle size difference of the ore raw materials at the current time node, which is marked as the static particle size deviation value.

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

[0022] Obtain the particle size value at the current time node and the particle size value at the previous time node within the historical period, perform a difference calculation on the particle size value at the current time node and the particle size value at the previous time node within the historical period to 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 the ball milling qualified signal is obtained, obtain the particle size data of the ore raw materials, and compare the particle size data of the ore raw materials with the particle size data of the ore raw materials required at the process end time;

[0024] If the particle size data of the ore raw materials reaches the particle size data of the ore raw materials required at the process end time, a signal for the ball mill to stop working is generated;

[0025] If the particle size data of the ore raw materials does not reach the particle size data of the ore raw materials required at 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 the ball milling unqualified signal is obtained, a ball mill control signal is generated. When the ball mill control signal is generated, this signal is sent to the controller of the ball mill to regulate the operation of the ball mill.

[0027] As a further solution of the present invention: when the ball mill regulation signal is obtained, the particle size value at the current time node and the particle size values at each time node within the historical period are acquired. The difference between the particle size value at the current time node and the particle size values at each time node within the historical period is calculated to obtain the time difference particle size value at each time node;

[0028] Taking the time node as the X-axis and the time difference particle size value as the Y-axis, a two-dimensional coordinate system is constructed. The time difference particle size value at each time node is substituted into the two-dimensional coordinate system, and the time difference particle size curve is plotted; wherein, a standard time difference particle size curve is preset in the two-dimensional coordinate system;

[0029] The time difference particle size curve and the preset standard time difference particle size curve are used to construct a closed figure, and the area of the closed figure is obtained and marked as the 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, a low ball mill stability signal is generated.

[0031] As a further solution of the present invention: when the low ball mill stability signal is obtained, the point with the largest difference between the time difference particle size curve and the preset standard time difference particle size curve is acquired and marked as the second dynamic particle size deviation value, which is marked as ZPD2. Through the formula the ball mill adjustment power PTg is calculated; wherein, CLd is the particle size difference of the ore raw material at the current time node.

[0032] As a further solution of the present invention: the process of obtaining the particle size difference of the ore raw material at the current time node is as follows:

[0033] The particle size data of the ore raw material at the current time node and the preset particle size data of the ore raw material are acquired. The difference between the particle size data of the ore raw material at the current time node and the preset particle size data of the ore raw material is calculated to obtain the particle size difference of the ore raw material at the current time node.

[0034] The beneficial effects of the present invention:

[0035] (1) The present invention directly installs gears or directly drives the cylinder of the ball mill using an electromagnetic direct drive motor, changing the structure of the traditional asynchronous motor driving a speed reducer and then driving the ball mill. Advantage description: Reducing the overload of the speed reducer makes the equipment run more smoothly. At the same time, it changes the electric energy consumed due to overload, achieving the purpose of energy conservation. By arbitrarily adjusting the speed ratio of the electromagnetic direct drive motor, during the grinding of different ores by the ball mill, the ball mill can simply give a reasonable speed according to the requirements of the desired product, thus changing the uncontrollable disadvantage of the traditional drive. At the same time, due to the arbitrary adjustment of the speed, it can adapt to the fineness modulus requirements of any raw ore corresponding products, and at the same time achieve the purpose of energy conservation and effectively reduce losses. In the face of the high energy consumption of large ball mills, electromagnetic direct drive motors can be installed at both ends of the ball mill, changing the disadvantage of asynchronous operation of traditional motors and changing the high energy consumption caused by excessive torque of traditional motors;

[0036] (2) The present invention obtains the characteristic data of ore grinding in the ball mill body; analyzes and calculates according to the characteristic data of ore grinding, outputs the ball grinding performance value, then makes a judgment according to the ball grinding performance value, and generates a signal indicating whether the ball grinding is qualified; according to the signal indicating whether the ball grinding is qualified, the ball mill performs corresponding operations; according to the generated control signal of the ball mill, the rotation speed of the ball mill is adjusted; the present invention analyzes the data according to the real-time changes of ore grinding in the ball mill, realizes the real-time monitoring of the current ball grinding operation, and at the same time, when an abnormality occurs, adjusts the ball grinding power in a timely manner, which is applicable to ore grinding in different states. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The present invention will be further described below with reference to the accompanying drawings.

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

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

[0040] Figure 3 is a schematic structural diagram of the connection relationship between the electromagnetic direct drive motor and the ball grinding bin body in the electromagnetic direct drive ball mill of the present invention;

[0041] Figure 4 is a system block diagram of the adjustable system of the present invention.

[0042] In the figure: 1. Ball grinding bin body; 2. Driving mechanism; 3. Feed inlet; 4. Discharge outlet; 5. Bearing seat; 6. Installation position of electromagnetic direct drive motor. DETAILED DESCRIPTION OF THE INVENTION

[0043] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0044] Embodiment 1

[0045] Please refer to Figure 1 and Figure 2 As shown, the present invention is a controllable electromagnetic direct-drive ball mill, including:

[0046] A ball milling chamber 1, driving mechanisms 2 are arranged at both ends or in the middle of the ball milling chamber 1. The driving mechanism can adopt a built-in driving motor, and an electromagnetic direct-drive motor installation position 6 is arranged at the bottom of the driving mechanism 2;

[0047] In addition, a feed inlet 3 and a discharge outlet 4 are respectively arranged at both ends of the ball milling chamber 1, and bearing seats 5 are arranged at both ends of the ball milling chamber;

[0048] The technical solution of the embodiment of the present invention: directly install a gear or directly drive the ball mill cylinder by an electromagnetic direct-drive motor, changing the structure of the traditional asynchronous motor driving a reducer and then driving the ball mill. Advantage description: reducing the overload of the reducer makes the equipment run more smoothly, and at the same time changing the electric energy consumed due to overload, achieving the purpose of energy saving. By arbitrarily adjusting the speed ratio of the electromagnetic direct-drive motor, when the ball mill is dealing with different ore grinding, it can simply give a reasonable speed according to the requirements of the required product, thus changing the uncontrollable disadvantage of the traditional drive, and at the same time achieving the purpose of effectively reducing losses due to the arbitrary adjustment of the speed. In the face of the high energy consumption of large ball mills, electromagnetic direct-drive motors can be installed at both ends of the ball mill, changing the disadvantage of the traditional motor being asynchronous and changing the high energy consumption caused by the excessive torque of the traditional motor.

[0049] Embodiment 2

[0050] Please refer to Figure 4 As shown, a controllable system is arranged in the electromagnetic direct-drive ball mill, and the controllable system includes:

[0051] An on-line acquisition module: obtaining the characteristic data of the ore grinding in the ball mill body;

[0052] Among them, the characteristic data includes the particle size data of the ore raw material;

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

[0054] Specifically, collect the ore raw materials in the ball mill body:

[0055] Set an image processing device in the ball mill body. The image processing device is used to photograph the ore raw materials being ground in real time in the ball mill body. The image processing device identifies and segments the ore image, and 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 existing technology. Specifically, reference can be made to a dynamic sand and gravel particle size detection device based on computer vision disclosed in Chinese Patent Publication No. CN 217520973 U.

[0056] The online analysis module analyzes and calculates based on the characteristic data of the ore grinding, outputs the ball milling performance value, then makes a judgment based on the ball milling performance value, and generates a signal indicating whether the ball milling is qualified.

[0057] Among them, the signal indicating whether the ball milling is qualified includes a qualified ball milling signal or an unqualified ball milling signal.

[0058] In some embodiments, analyze the ore raw material particle size data collected by the online acquisition module. The specific process is as follows:

[0059] Obtain the ore raw material particle size data at each time node during the ball milling time, analyze to obtain the static particle size deviation value and the dynamic particle size deviation value, take the ratio of the static particle size deviation value to the dynamic particle size deviation value to obtain the ball milling performance value.

[0060] Compare the ball milling performance value with the ball milling performance threshold.

[0061] If the ball milling performance value is greater than or equal to the ball milling performance threshold, it indicates that the grinding degree of the ore by the ball mill at the current time node is quite different from the grinding degree required by the actual process, which does not meet the requirements of the actual ball milling process, and then generate an unqualified ball milling signal.

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

[0063] Specifically, the way to obtain the static particle size deviation value is as follows:

[0064] Obtain the ore raw material particle size data at the current time node and the preset ore raw material particle size data (pre-set by the technical personnel according to the process), calculate the difference between the ore raw material particle size data at the current time node and the preset ore raw material particle size data to obtain the ore raw material particle size difference at the current time node, which is marked as the static particle size deviation value.

[0065] The way to obtain the dynamic particle size deviation value is as follows:

[0066] Obtain the particle size value at the current time node and the particle size value at the previous time node within the historical period. Calculate the difference between the particle size value at the current time node and the particle size value at the previous time node within the historical period to obtain the dynamic particle size deviation value of the time node, which is marked as the dynamic particle size deviation value;

[0067] Ball milling execution module: According to the ball milling qualification signal, the ball mill performs corresponding operations;

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

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

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

[0071] When the ball milling unqualified signal is obtained, generate a ball mill regulation signal. When the ball mill regulation signal is generated, send this signal to the controller of the ball mill to regulate the operation of the ball mill;

[0072] Ball milling regulation module: According to the generated ball mill regulation signal, regulate the rotation speed of the ball mill;

[0073] In some embodiments, when the ball mill regulation signal is obtained, obtain the particle size value at the current time node and the particle size value at each time node within the historical period. Calculate the difference between the particle size value at the current time node and the particle size value at each time node within the historical period to obtain the time difference particle size value at each time node;

[0074] Taking the time node as the X-axis and the time difference particle size value as the Y-axis, construct a two-dimensional coordinate system. Substitute the time difference particle size value at each time node into the two-dimensional coordinate system and draw to obtain the time difference particle size curve; among them, there is a preset standard time difference particle size curve in the two-dimensional coordinate system;

[0075] Construct a closed figure with the time difference particle size curve and the preset standard time difference particle size curve, obtain the area of the closed figure, and mark it as the time difference particle size deviation value;

[0076] Compare 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, a low ball milling stability 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, a high ball milling stability signal is generated;

[0079] When the high ball milling stability signal is obtained, the first dynamic particle size deviation value is acquired, marked as ZPD1, and the ball milling adjustment power PTg is calculated through the formula where CLd is the particle size difference of the ore raw material at the current time node;

[0080] Among them, the process of obtaining the particle size difference of the ore raw material at the current time node is as follows:

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

[0082] When the low ball milling stability signal is obtained, the point with the largest difference between the time difference particle size curve and the preset standard time difference particle size curve is acquired, marked as the second dynamic particle size deviation value, marked as ZPD2, and the ball milling adjustment power PTg is calculated through the formula where CLd is the particle size difference of the ore raw material at the current time node;

[0083] Among them, the process of obtaining the particle size difference of the ore raw material at the current time node is as follows:

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

[0085] When the ball milling 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 milling adjustment power to regulate the power of the ball mill, which is applicable to the work of ore grinding in different states during the ball milling process;

[0086] Technical solution of the embodiment of the present invention: Obtain the characteristic data of ore grinding powder in the ball mill body; perform analysis and calculation according to the characteristic data of ore grinding powder, output the ball milling performance value, then make a judgment according to the ball milling performance value, and generate a signal indicating whether the ball milling is qualified; according to the signal indicating whether the ball milling is qualified, the ball mill performs corresponding operations; according to the generated ball mill control signal, adjust the rotation speed of the ball mill; The present invention analyzes data according to the real-time change of ore grinding powder in the ball mill, realizes real-time monitoring of the current ball milling operation, and at the same time adjusts the ball milling power in time when abnormalities occur, and is applicable to ore grinding powder in different states.

[0087] The above formulas are all dimensionless and take their numerical values for calculation. The formulas are obtained by collecting a large amount of data for software simulation to obtain a formula closest to the real situation. The preset parameters in the formulas are set by those skilled in the art according to the actual situation.

[0088] The above has described in detail an embodiment of the present invention, but the content described is only the preferred embodiment of the present invention and cannot be considered as limiting the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the application of the present invention should still fall within the scope covered by the patent of the present invention.

Claims

1. An adjustable electromagnetic direct-drive ball rod mill, characterized in that: include: The ball mill chamber body has a driving mechanism at both ends or in the middle thereof, and the driving mechanism adopts a built-in driving motor; In addition, a feed port and a discharge port are respectively arranged at both ends of the ball mill body, and a bearing seat is arranged at both ends of the ball mill body; The electromagnetic direct drive ball mill is equipped with an adjustable system, which includes: Online acquisition module: obtain the 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 performs analysis and calculation based on the characteristic data of ore grinding, outputs the ball milling performance value, makes a judgment based on the ball milling performance value, and generates a signal on whether the ball milling is qualified; Wherein, 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.

2. The adjustable electromagnetic direct-drive ball rod mill according to claim 1, characterized in that: The output process of ball mill performance value is: The particle size data of the ore raw materials at each time point during the ball milling time are obtained, and the static particle size deviation value and the dynamic particle size deviation value are obtained by analysis. The static particle size deviation value is compared with the dynamic particle size deviation value to obtain the ball milling performance value.

3. The adjustable electromagnetic direct-drive ball rod mill according to claim 2, characterized in that: 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.

4. The adjustable electromagnetic direct-drive ball rod mill according to claim 2, characterized in that: The static particle size deviation value is obtained 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, obtain the ore raw material particle size difference of the current time node, and mark it as the static particle size deviation value.

5. The adjustable electromagnetic direct-drive ball rod mill according to claim 4, characterized in that: 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 get the dynamic particle size deviation value of the time node, which is marked as the dynamic particle size deviation value.

6. The adjustable electromagnetic direct-drive ball rod mill according to claim 5, characterized in that: When a ball mill 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 end time of the process; 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 signal to stop the ball mill is generated; If the ore raw material particle size data does not reach the ore raw material particle size data required by the process end time, a signal for the ball mill to continue working is generated.

7. The adjustable electromagnetic direct-drive ball rod mill according to claim 6, characterized in that: When a ball mill 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.

8. The adjustable electromagnetic direct-drive ball rod mill according to claim 7, characterized in that: When the 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; 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, and 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 a standard time difference particle size curve is preset in the two-dimensional coordinate system; Construct a closed graph by combining the time difference particle size curve with the time difference particle size curve with a preset standard, obtain the area of ​​the closed graph, and mark it 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 ball milling stability low signal is generated.

9. The adjustable electromagnetic direct-drive ball rod mill according to claim 8, 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; wherein CLd is the difference in particle size of the ore raw materials at the current time node.

10. 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 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, and obtain the ore raw material particle size difference at the current time node.

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