Self-adjusting grinding and selecting system of permanent magnet motor direct-driven ball mill

Abstract

The invention discloses a self-adjusting grinding and separation system of a permanent magnet motor direct-driven ball mill, and belongs to the technical field of ore grinding and separation. The invention discloses a self-adjusting grinding and selecting system of a permanent magnet motor direct-driven ball mill. The self-adjusting grinding and selecting system comprises a driving control module, a state monitoring module, an automatic feeding module, a grading and separating module, an ore pond control module and a data processing and centralized control module. According to the invention, the problem of low automation and intelligence degree in the prior art is solved. By introducing permanent magnet motor direct drive, the Internet of Things technology and multiple sensors, remote control, fault diagnosis and centralized management of multiple devices are achieved, and manual intervention is greatly reduced. The intelligent optimization system adjusts process parameters in real time, ensures the optimal operation state, improves the production efficiency and the product quality, ensures the stability and reliability of the system, and truly realizes unattended intelligent production.

Description

Technical Field

[0001] The invention relates to the technical field of ore grinding and selection, in particular to a self-adjusting grinding and selection system of a permanent magnet motor directly driving a ball mill. Background Art

[0002] In the current mineral processing industry, traditional ball mills and their supporting grinding and selection systems have many problems of insufficient automation and intelligence, which seriously restrict production efficiency, product quality and safe production. Specifically: the degree of automation of the grinding and selection system is low, and the personnel on duty need to frequently perform on-site operations, which not only increases labor costs, but also may introduce operational errors due to human factors, affecting product quality; there is a lack of effective online monitoring methods, and it is impossible to grasp the changes in equipment operating status and process parameters in real time. This makes it difficult to adjust process conditions in a timely manner, resulting in large fluctuations in product quality, and when a fault occurs, it cannot be quickly located and resolved, increasing maintenance time and costs. Therefore, the grinding and selection process in the traditional mineral processing industry is difficult to achieve true unmanned operation, and requires a lot of manual intervention to maintain basic operation, which is relatively inconvenient. Summary of the invention

[0003] The purpose of the present invention is to provide a self-adjusting grinding and selection system for a permanent magnet motor directly driven ball mill. By introducing permanent magnet motor direct drive, Internet of Things technology and multiple sensors, this solution realizes remote control, fault diagnosis and centralized management of multiple devices, greatly reducing manual intervention. The intelligent optimization system adjusts the process parameters in real time to ensure the best operating state, improves production efficiency and product quality, ensures the stability and reliability of the system, truly realizes unmanned intelligent production, and solves the problems raised in the above background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A self-adjusting grinding and selection system for a permanent magnet motor directly driven ball mill, comprising:

[0006] The drive control module includes a permanent magnet synchronous variable frequency motor and a high-voltage frequency converter, wherein the permanent magnet synchronous variable frequency motor is used to drive the ball mill cylinder to rotate; the high-voltage frequency converter is used to drive the permanent magnet synchronous variable frequency motor and realize remote control and fault diagnosis;

[0007] The status monitoring module, which consists of a grinding sound monitoring unit, a vibration sensor, a speed sensor and a temperature sensor, is used to monitor the internal operating status and environmental parameters of the ball mill in real time;

[0008] The automatic feeding module includes an automatic ball adding machine and a feeding trolley. The number of balls to be added regularly is set according to the ball consumption of the ball mill on site, and the balls are automatically replenished. The feeding trolley moves on the track to provide a continuous and stable material supply for the ball mill.

[0009] Grading and separation modules, including hydrocyclones and high-field magnetic separators, are used to grade and separate materials according to their size and properties to ensure the quality of the concentrate;

[0010] The mine pool control module includes a radar level gauge, a feed pump and a slurry concentration meter. The radar level gauge is used to monitor and adjust the liquid level in the feed pool to maintain stable working conditions. The feed pump is used to transport materials to the hydrocyclone. The slurry concentration meter is used to monitor the concentration of the transported materials and adjust the feed frequency and liquid level in time.

[0011] The data processing and centralized control module integrates Internet of Things technology and edge computing capabilities. It is used to receive monitoring data and operating data transmitted through the network, calculate the operating load of the hydrocyclone, ball mill and high-field strength magnetic separator using mathematical models, and automatically adjust various parameters of the feeding process according to detection signals to achieve unattended operation. It has the centralized control function of multiple devices.

[0012] Preferably, the high-voltage inverter is matched with a permanent magnet synchronous variable frequency motor, and the high-voltage inverter supports access to multiple communication interfaces. The high-voltage inverter is also connected to the grinding sound monitoring unit, automatic ball adding machine, hydrocyclone, ore feeding pump, slurry concentration meter, radar level meter, vibration sensor, speed sensor and temperature sensor signal.

[0013] Preferably, the high-voltage frequency converter is remotely signal-connected to the data processing and centralized control module.

[0014] Preferably, the grinding sound monitoring unit is connected to the ball mill, and is used to monitor the operating sound inside the ball mill cylinder, and determine the operating status inside the ball mill cylinder based on the sound.

[0015] Preferably, the permanent magnet synchronous variable frequency motor is connected to a motor water cooling device, the motor water cooling device is powered by a high voltage frequency converter and is connected to a data and centralized control module.

[0016] Preferably, the automatic ball adding machine sets the number of balls to be added regularly according to the steel ball consumption of the on-site ball mill, and automatically replenishes the balls through the control of a high-voltage frequency converter.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The present invention integrates Internet of Things technology and multiple sensors to realize remote control, fault diagnosis and centralized control operation of multiple devices through high-voltage frequency converters. The high-voltage frequency converters are wirelessly connected to data processing and centralized control modules to analyze and process sensor data and operation data of each device. Mathematical models are used to optimize the circulating load of the hydrocyclone, automatically adjust the feed concentration and pressure, and further improve production efficiency. Unattended operation is realized, the need for manual intervention is reduced, the equipment status is monitored in real time, and process parameters are adjusted in time to ensure the best operating state.

[0019] 2. In the present invention, the liquid level of the pump pool is monitored in real time by a radar level meter, and the data is fed back to the data processing and centralized control module through network transmission to ensure that the liquid level remains within a safe range; the ore feeding pump adjusts the delivery rate according to the concentration information provided by the slurry concentration meter; the automatic ball adding machine sets the regular ball adding quantity according to the consumption of steel balls in the on-site ball mill, and automatically replenishes the balls, ensuring that there is always enough grinding medium in the ball mill, and the entire sorting process is highly automated and intelligent. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the cyclone classification-magnetic separation-ball milling process system of the present invention;

[0021] Figure 2 It is a side structural diagram of the permanent magnet motor direct-driven ball mill of the present invention;

[0022] Figure 3 It is a schematic diagram of the cyclone classification-feeding pump feeding process system of the present invention.

[0023] In the figure: 1. ball mill; 2. automatic ball adding machine; 3. hydrocyclone; 4. permanent magnet synchronous variable frequency motor; 5. feeding trolley; 6. grinding sound monitoring unit; 7. high voltage inverter; 8. motor water cooling device; 9. high field strength magnetic separator; 10. radar level meter; 11. feed pump; 12. slurry concentration meter; 13. feed pool. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] In order to solve the problem of low automation and intelligence of existing ore grinding and selection technology, please refer to Figure 1-3 , this embodiment provides the following technical solutions:

[0026] A self-adjusting grinding and selection system for a permanent magnet motor directly driven ball mill, comprising:

[0027] The drive control module includes a permanent magnet synchronous variable frequency motor 4 and a high voltage frequency converter 7. The permanent magnet synchronous variable frequency motor 4 is used to drive the cylinder of the ball mill 1 to rotate; the high voltage frequency converter 7 is used to drive the permanent magnet synchronous variable frequency motor 4 and perform remote control and fault diagnosis;

[0028] Specifically, the transmission efficiency of the permanent magnet synchronous variable frequency motor 4 is about 93%, and the energy consumption of the permanent magnet synchronous variable frequency motor 4 adopted reaches the international IE4 (higher than the national first-level energy consumption standard), which is 15% higher than the efficiency of "asynchronous motor + reducer". The starting torque of the permanent magnet synchronous variable frequency motor 4 is 220% of the rated torque. When the working condition requires full load or overload starting, it can be started directly without manual unloading, avoiding motor damage caused by stalling and overload;

[0029] The permanent magnet synchronous variable frequency motor 4 is connected to a pinion through a drum coupling, and the pinion is meshed with a large gear provided on the ball mill 1, thereby driving the cylinder of the ball mill 1 to rotate;

[0030] The high-voltage inverter 7 is matched with the permanent magnet synchronous variable frequency motor 4. The high-voltage inverter 7 adopts the Internet of Things technology and supports the access of multiple communication interfaces such as CAN, ModBus485, PROFBUSDP, etc.

[0031] The high-voltage frequency converter 7 is also connected to the grinding sound monitoring unit 6, the automatic ball adding machine 2, the hydrocyclone 3, the ore feeding pump 11, the slurry concentration meter 12, the radar level meter 10, the vibration sensor, the speed sensor and the temperature sensor;

[0032] The high-voltage inverter 7 is connected to the data processing and centralized control module by remote signal, and transmits the operation and monitoring data to the centralized control and dispatching room, realizing unattended, remote control, online monitoring and fault diagnosis functions;

[0033] The state monitoring module, which is composed of a grinding sound monitoring unit 6, a vibration sensor, a rotation speed sensor and a temperature sensor, is used to monitor the internal operating state and environmental parameters of the ball mill 1 in real time;

[0034] The automatic feeding module includes an automatic ball adding machine 2 and a feeding trolley 5. The automatic ball adding machine 2 sets the number of balls to be added regularly according to the ball consumption of the ball mill 1 on site, and automatically replenishes the balls under the control of the high-voltage frequency converter 7. The feeding trolley 5 moves on the track. The main structure of the feeding trolley 5 is a feeding chute and a car body. The feeding chute is fixed on the car body to provide a continuous and stable material supply for the ball mill 1.

[0035] The grading and separation module includes a hydrocyclone 3 and a high-field strength magnetic separator 9, which is used to grade and separate materials according to their size and properties to ensure the quality of the concentrate;

[0036] The hydrocyclone 3 classifies the incoming materials, and the fine particles enter the high-field strength magnetic separator 9 through the overflow pipeline at the top of the hydrocyclone 3, and the coarse particles enter the feeding trolley 5 through the sand settling pipeline at the bottom of the hydrocyclone 3, and are then transported to the ball mill 1;

[0037] Among them, after the fine particle material enters the high field strength magnetic separator 9, the magnetic ore particles are magnetically aggregated under the action of the magnetic field to form magnetic clusters. The magnetic clusters are acted on by the magnetic force in the ore pulp and move toward the magnetic poles and are adsorbed on the cylinder. These magnetic particle concentrates move with the cylinder to the weakest magnetic point at the edge of the magnetic system, and are unloaded into the concentrate tank under the action of the flushing water flow sprayed from the unloading water pipe, and the non-magnetic impurities are discharged from the grinding and selection circulation system;

[0038] The mining pool control module includes a radar level meter 10, a feeding pump 11 and a slurry concentration meter 12. The radar level meter 10 is placed above the feeding pool 13 and is used to monitor and adjust the liquid level in the feeding pool 13, and transmit the liquid level data to the data processing and centralized control module in real time to maintain stable working conditions; the slurry concentration meter 12 is used to monitor the concentration of the transported material and adjust the feeding frequency and liquid level in time; the feeding pump 11 is used to transport the material to the hydrocyclone 3.

[0039] The data processing and centralized control module integrates Internet of Things technology and edge computing capabilities, is used to receive monitoring data and operating data transmitted by the network, uses mathematical models to calculate the operating load of the hydrocyclone 3, ball mill 1 and high-field strength magnetic separator 9, and automatically adjusts various parameters of the ore feeding process according to the detection signal to achieve unattended operation; it has the centralized control function of multiple devices to ensure the coordinated operation of the entire production line; and a centralized control room is set up to adjust the equipment parameters remotely.

[0040] The grinding sound monitoring unit 6 is connected to the ball mill 1 and is used to monitor the operating sound inside the cylinder of the ball mill 1 and determine the operating status inside the cylinder of the ball mill 1 according to the sound.

[0041] The permanent magnet synchronous variable frequency motor 4 is connected to the motor water cooling device 8. A water filter is added to the water inlet of the permanent magnet synchronous variable frequency motor 4. Antifreeze can be added when working in a low temperature environment. The motor water cooling device 8 has a built-in cooling fan, a water pump and a matching motor. The water pump is made of stainless steel; the motor water cooling device 8 is powered by the high-voltage inverter 7 and is connected to the data and centralized control module for control.

[0042] Working principle: The feed pool 13 receives the materials after ultra-fine crushing, screening and coarse magnetic separation. The radar level meter 10 monitors the pump pool level in real time and feeds back the data to the data processing and centralized control module through network transmission to ensure that the liquid level remains within a safe range. The feed pump 11 adjusts the delivery rate according to the concentration information provided by the slurry concentration meter 12 to ensure the best feeding conditions. The materials are fed into the hydrocyclone 3 for efficient classification.

[0043] Among them, coarse-grained ore enters the feeding trolley 5 through the sand settling pipeline and is input into the ball mill 1 for grinding. The permanent magnet synchronous variable frequency motor 4 drives the cylinder of the ball mill 1 to rotate through the drum coupling and the gear transmission system. The high-voltage inverter 7 accurately controls the motor speed and collects data from the vibration, speed and temperature sensors. The grinding sound monitoring unit 6 monitors the sound in the cylinder, determines the grinding state and makes corresponding adjustments. The automatic ball adding machine 2 automatically replenishes steel balls based on the set time or the detected steel ball consumption. The ground material enters the ore feeding pool 13 again; the fine-grained ore enters the high-field strength magnetic separator 9 through the overflow pipeline, the magnetic ore particles are adsorbed and finally unloaded into the concentrate tank, and the non-magnetic part is discharged as tailings.

[0044] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0045] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A self-adjusting grinding and selection system for a permanent magnet motor directly driven ball mill, characterized in that: include: A drive control module comprises a permanent magnet synchronous variable frequency motor (4) and a high voltage frequency converter (7), wherein the permanent magnet synchronous variable frequency motor (4) is used to drive the cylinder of the ball mill (1) to rotate; and the high voltage frequency converter (7) is used to drive the permanent magnet synchronous variable frequency motor (4) and realize remote control and fault diagnosis; A state monitoring module, which is composed of a grinding sound monitoring unit (6), a vibration sensor, a rotation speed sensor and a temperature sensor, and is used to monitor the internal operating state and environmental parameters of the ball mill (1) in real time; The automatic feeding module includes an automatic ball adding machine (2) and a feeding trolley (5), which sets the number of balls to be added regularly according to the consumption of steel balls of the on-site ball mill (1) to automatically replenish the balls; the feeding trolley (5) moves on a track to provide a continuous and stable material supply to the ball mill (1); A classification and separation module, including a hydrocyclone (3) and a high-field strength magnetic separator (9), is used to classify and separate materials according to their size and properties to ensure the quality of the concentrate; A mine pool control module comprises a radar level meter (10), a feed pump (11) and a pulp concentration meter (12), wherein the radar level meter (10) is used to monitor and adjust the liquid level in the feed pool (13) to maintain stable working conditions, the feed pump (11) is used to transport materials to the hydrocyclone (3), and the pulp concentration meter (12) is used to monitor the concentration of the transported materials and timely adjust the feed frequency and liquid level; The data processing and centralized control module integrates Internet of Things technology and edge computing capabilities, is used to receive monitoring data and operating data transmitted by the network, calculate the operating load of the hydrocyclone (3), the ball mill (1) and the high-field strength magnetic separator (9) using a mathematical model, and automatically adjust various parameters of the ore feeding process according to the detection signal; and centrally control multiple devices.

2. The self-adjusting grinding and selection system of a permanent magnet motor directly driven ball mill according to claim 1 is characterized in that: The high-voltage frequency converter (7) is matched with the permanent magnet synchronous variable frequency motor (4), the high-voltage frequency converter (7) supports multiple communication interface accesses, and the high-voltage frequency converter (7) is also connected with the grinding sound monitoring unit (6), the automatic ball adding machine (2), the hydrocyclone (3), the ore feeding pump (11), the ore pulp concentration meter (12), the radar level meter (10), the vibration sensor, the rotation speed sensor and the temperature sensor signal.

3. The self-adjusting grinding and selection system of a permanent magnet motor directly driven ball mill according to claim 2 is characterized in that: The high-voltage frequency converter (7) is also remotely signal-connected to the data processing and centralized control module.

4. The self-adjusting grinding and selection system of a permanent magnet motor directly driven ball mill according to claim 3 is characterized in that: The grinding sound monitoring unit (6) is connected to the ball mill (1) and is used to monitor the operating sound inside the cylinder of the ball mill (1) and to determine the operating status inside the cylinder of the ball mill (1) based on the sound.

5. The self-adjusting grinding and selection system of a permanent magnet motor directly driven ball mill according to claim 4 is characterized in that: The permanent magnet synchronous variable frequency motor (4) is connected to a motor water cooling device (8), the motor water cooling device (8) is powered by a high voltage frequency converter (7), and is connected to a data and centralized control module.

6. The self-adjusting grinding and selection system of a permanent magnet motor directly driven ball mill according to claim 5 is characterized in that: The automatic ball adding machine (2) sets the number of balls to be added regularly according to the steel ball consumption of the on-site ball mill (1), and automatically replenishes the balls under the control of the high-voltage frequency converter (7).

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