Video monitoring system and monitoring method for ore dressing filter

Abstract

The application discloses a kind of ore dressing filter video monitoring system and monitoring method, belong to filtering production control system technical field, including remote monitoring center, data transmission node and field monitoring device, the field monitoring device is connected the remote monitoring center by data transmission node, the field monitoring device includes magnetic separator, distribution box and filter, iron concentrate pump is connected between the distribution box and filter, filtrate pipeline is equipped with filtrate pump, iron concentrate powder is sent to iron concentrate material shed by conveying mechanism, moisture is transported to accident pool by filtrate pump, the top of the magnetic separator, distribution box, filter and conveying mechanism is all erected with camera, the field controller connects liquid level sensor. Realize the whole process monitoring of ore pulp filtration production, make centralized control system more perfect, realize the visualization of control, clear, real-time display system operation and various fault conditions, timely alarm display and record.

Description

Technical Field

[0001] This invention relates to a video monitoring system and method for a mineral processing filter, belonging to the technical field of filter production control systems. Background Technology

[0002] Filtration is the final and crucial step in the mineral processing industry, as the moisture content of iron concentrate is a key performance indicator for its sale. Therefore, its safe and efficient operation is of paramount importance. Due to the widely distributed equipment, fragmented information, and high control requirements of filtration systems, coupled with the need for increased automation in modern mines, higher demands are placed on the control and management of filtration production.

[0003] Existing filtration production equipment is scattered and cannot be controlled uniformly. Each process requires specialized personnel to operate, resulting in a significant waste of human and material resources. At the same time, during production, employees need to start each machine individually, which is labor-intensive and can easily lead to accidents due to employee misoperation. For example, patent publication number CN111604161A discloses a tailings comprehensive utilization production line and method. This production line includes a magnetic separator, a filter, a thickener and backfilling unit, and a dewatering conveyor. The various mechanisms are scattered and cannot be controlled uniformly. In addition, the production line lacks effective monitoring devices, making it impossible to monitor the equipment on-site. The labor intensity for employees is high, and safety performance cannot be guaranteed. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the purpose of this invention is to provide a video monitoring system and method for mineral processing filters, which solves the problems that have occurred in the prior art.

[0005] The mineral processing filter video monitoring system of the present invention includes a remote monitoring center, a data transmission node, and a field monitoring device. The field monitoring device is connected to the remote monitoring center through the data transmission node. The field monitoring device includes a magnetic separator, a feeding box, and a filter. A slurry injector is externally connected to the magnetic separator. An iron concentrate pump is connected between the feeding box and the filter. After magnetic separation by the magnetic separator, the slurry is transported to the feeding box by the iron concentrate pump, and then distributed to the filter for slurry dewatering. A conveying mechanism and a filtrate pipeline are externally connected to the filter. The conveying mechanism is connected to an iron concentrate shed. An emergency pool is connected to the end of the filtrate pipeline. A filtrate pump is installed on the filtrate pipeline. Iron concentrate is transported to the iron concentrate shed by the conveying mechanism, and water is transported to the emergency pool by the filtrate pump. Cameras are mounted above the magnetic separator, feeding box, filter, and conveying mechanism. The cameras are electrically connected to a field controller. An overflow trough is provided at the feed inlet of the filter. A liquid level sensor is installed in the overflow trough. The field controller is connected to the liquid level sensor.

[0006] Furthermore, the magnetic separator includes multiple stages, and a feeding channel is connected to the end of the magnetic separator. Multiple distribution pipes are connected to the end of the feeding channel, and the iron concentrate pump is installed on the distribution pipes.

[0007] Furthermore, the conveying mechanism is a belt conveyor, and the front end and rear end of the conveying mechanism are respectively connected to a discharge port and a feed port.

[0008] Furthermore, the overflow tank is equipped with a vertically arranged baffle, which is not connected to the bottom of the overflow tank. The baffle divides the middle part of the overflow tank into an overflow area, in which a liquid level sensor is installed, and an alarm is connected to the field controller.

[0009] Furthermore, the data transmission node is a wireless network coordinator. The field controller connects to the wireless network coordinator through a self-organizing wireless network. The wireless network coordinator is used to upload the status data of the field monitoring device to the remote monitoring center.

[0010] Furthermore, the filter includes multiple units, each filter is connected to a variable frequency motor, the variable frequency motor is connected to a filter inverter, the multiple filter inverters are connected to an inverter cabinet, the inverter cabinet is connected to the field controller, the frequency of each filter inverter in the inverter cabinet is given from the remote monitoring center, the remote monitoring center feeds back the real-time frequency of the filter to the field controller, and the field controller controls the speed of the filter.

[0011] Furthermore, each of the iron concentrate pumps has a motor connected to an iron concentrate pump frequency converter, which is connected to the field controller. The frequency of the iron concentrate pump frequency converter is given from the remote monitoring center, which feeds back the real-time frequency of the iron concentrate pump to the field controller, which then controls the rotational speed of the iron concentrate pump.

[0012] Furthermore, the field controller is a PLC controller.

[0013] Furthermore, the filter inverter and the iron concentrate pump inverter are equipped with a changeover switch, which is connected to the digital input contact of the inverter and defined as an analog signal control point to realize one-button switching of the frequency modulation signal.

[0014] The video monitoring method for mineral processing filters according to the present invention includes the following steps:

[0015] S1: The slurry is first separated by a magnetic separator, and then pumped to the distribution box. The distribution box feeds the ore evenly to each filter. The vacuum pump in the filter dewaters the filter cake on the surface of the filter. The filter cake falls to the concentrate conveying mechanism and is transported to the iron concentrate shed by the conveying mechanism. The water is transported to the emergency pool by the filtrate pump.

[0016] S2: Install monitoring systems according to job requirements. Install cameras above the magnetic separator, dispensing box, filter and conveying mechanism, and network them to the existing monitoring system network to achieve real-time network access. Transmit the images to the remote monitoring center for preview and realize real-time remote monitoring of process operations.

[0017] S3: Integrate the original control system of the filter into the video monitoring system. Write a program according to the process control requirements of the equipment. The entire program consists of several main subroutines, namely "one-button start / stop of equipment", "data sampling" and "frequency setting", depending on the function. There are not only physical interlocks between relays between the equipment, but also software interlocks in the program.

[0018] S4: Establish a window control center configuration screen in the remote monitoring center to realize timely archiving of process data on site, including temperature, current, power parameters, trend curves, operation records and alarm records, and realize remote control and monitoring of operating parameters.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The mineral processing filter machine video monitoring system and method described in this invention realizes full-process monitoring of slurry filtration production, making the centralized control system more complete and achieving observable and clear control. It allows for independent PLC programming and configuration screen design. It can display the system's operating status and various fault conditions in real time, and provide timely alarm display and recording.

[0021] The centralized control system for filtration is added to the original electrical control system. The original electrical control system already has physical interlocks between relay contactors between devices. At the same time, software interlocks are added to the PLC program design to achieve "dual protection" of device interlocks, which improves the reliability of equipment operation.

[0022] The centralized filtration control system achieves "dual protection" through equipment interlocking, which greatly reduces the equipment malfunction rate and improves the reliability of equipment operation. The automation system analyzes the equipment operating parameters in real time, issues alarms in a timely manner when abnormal conditions occur, and automatically shuts down the equipment in serious cases to prevent the equipment failure from escalating.

[0023] After implementing the "one-button start / stop" function for the filtration system, employees no longer need to start each unit individually, reducing their workload and preventing accidents caused by employee misoperation. This significantly reduces potential points of failure, lowers the failure rate, and ensures efficient and smooth filtration production. Attached Figure Description

[0024] Figure 1 This is a flowchart of the overall video monitoring system for the mineral processing filter machine of the present invention;

[0025] Figure 2This is a schematic diagram of the video monitoring system for the mineral processing filter machine of the present invention;

[0026] Figure 3 This is a schematic diagram of the filter structure in the video monitoring system of the mineral processing filter machine of the present invention;

[0027] Figure 4 This is a schematic diagram of the overflow tank of the filter in the video monitoring system of the mineral processing filter machine of the present invention;

[0028] Figure 5 This is a network architecture diagram of the video monitoring system for the mineral processing filter machine of the present invention;

[0029] Figure 6 This is an electrical connection diagram of the field controller in the video monitoring system for the mineral processing filter machine of the present invention;

[0030] Figure 7 This is a circuit connection diagram of the frequency converter in the video monitoring system of the mineral processing filter machine of the present invention;

[0031] Figure 8 This is a cabinet layout diagram of the frequency converter in the video monitoring system of the mineral processing filter machine of the present invention;

[0032] Figure 9 This is a connection diagram of the PLC controller in the video monitoring system of the mineral processing filter machine of the present invention;

[0033] In the diagram: 1. Slurry injector; 2. First camera; 3. Magnetic separator; 4. Magnetic separation chamber; 5. Second camera; 6. Feeding channel; 7. Distribution box; 8. Iron concentrate pump; 9. Filter; 10. Third camera; 11. Feeding port; 12. Conveying mechanism; 13. Iron concentrate shed; 14. Discharge port; 15. Filtrate pipeline; 16. Emergency pool; 17. Distribution pipeline; 18. Liquid level sensor; 19. Overflow trough; 20. Baffle; 21. Field controller; 22. Frequency converter cabinet; 23. Variable frequency motor; 24. Overflow port. Detailed Implementation

[0034] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0035] Example 1:

[0036] like Figures 1-5As shown, the mineral processing filter video monitoring system of the present invention includes a remote monitoring center, a data transmission node, and a field monitoring device. The field monitoring device is connected to the remote monitoring center through the data transmission node. The field monitoring device includes a magnetic separator 3, a distribution box 7, and a filter 9. A slurry injector 1 is externally connected to the magnetic separator 3. An iron concentrate pump 8 is connected between the distribution box 7 and the filter 9. After magnetic separation by the magnetic separator 3, the slurry is transported to the distribution box 7 by the iron concentrate pump 8, and then distributed by the distribution box 7 to the filter 9 for slurry dewatering. A conveying mechanism 12 and a filter filter are externally connected to the filter 9. The filtrate pipe 15 is connected to the iron concentrate shed 13 via the conveying mechanism 12. An emergency pool 16 is connected to the end of the filtrate pipe 15. A filtrate pump is installed on the filtrate pipe 15. Iron concentrate is transported to the iron concentrate shed 13 by the conveying mechanism 12, and water is transported to the emergency pool 16 by the filtrate pump. Cameras are installed above the magnetic separator 3, the material distribution box 7, the filter 9, and the conveying mechanism 12. The cameras are electrically connected to a field controller. An overflow trough 19 is provided at the inlet of the filter 9. A liquid level sensor 18 is installed in the overflow trough 19. The field controller is connected to the liquid level sensor 18.

[0037] The magnetic separator 3 includes multiple stages. The end of the magnetic separator 3 is connected to a feeding channel 6. The end of the feeding channel 6 is connected to multiple distribution pipes 17. The iron concentrate pump 8 is installed on the distribution pipes 17.

[0038] The conveying mechanism 12 is a belt conveyor mechanism, and the front end and the rear end of the conveying mechanism 12 are respectively connected to the discharge port 11 and the outlet 14.

[0039] The overflow tank 19 is equipped with a vertically arranged baffle 20. The baffle 20 is not connected to the bottom of the overflow tank 19. The baffle 20 divides the middle part of the overflow tank 19 into an overflow area. A liquid level sensor 18 is installed in the overflow area, and an alarm is connected to the field controller.

[0040] The data transmission node is a wireless network coordinator. The field controller connects to the wireless network coordinator through a self-organized wireless network. The wireless network coordinator is used to upload the status data of the field monitoring device to the remote monitoring center.

[0041] The filter 9 includes multiple units, each filter 9 is connected to a variable frequency motor 23, the variable frequency motor 23 is connected to a filter frequency converter, the multiple filter frequency converters are connected to a frequency converter cabinet 22, the frequency converter cabinet 22 is connected to the field controller 21, the frequency of each filter frequency converter in the frequency converter cabinet 22 is given by the remote monitoring center, the remote monitoring center feeds back the real-time frequency of the filter 9 to the field controller 21, and the field controller 21 controls the rotational speed of the filter 9.

[0042] Each of the iron concentrate pumps 8 has a motor connected to an iron concentrate pump frequency converter, which is connected to the field controller. The frequency of the iron concentrate pump frequency converter is given from the remote monitoring center. The remote monitoring center feeds back the real-time frequency of the iron concentrate pump 8 to the field controller, which controls the rotational speed of the iron concentrate pump 8.

[0043] The field controller uses a PLC controller.

[0044] The filter machine frequency converter and the iron concentrate pump frequency converter are equipped with a changeover switch. The changeover switch is connected to the digital input contact of the frequency converter and the point is defined as analog signal control to realize one-key switching of frequency modulation signal.

[0045] The specific application of this embodiment is as follows: First, the slurry is separated by a three-magnetic separator. After separation, the slurry is transported to a distribution box by an iron concentrate pump 8. The distribution box then distributes the slurry to six vacuum permanent magnet filters for dewatering. The iron concentrate is transported by belt to the iron concentrate shed, and the water is pumped to the emergency pool via a filtrate pump. The original filter overflow tank lacked a level sensor, requiring manual observation of the overflow level, which led to ore runoff and was detrimental to safe production. Large overflows could also cause the upstream three-magnetic separator to fail to deliver excessive slurry in time, resulting in ore runoff. Therefore, a GSK series reed switch float level sensor is installed in the overflow tank at the top of the filter. When the slurry at the top of the filter exceeds its self-overflow capacity, it promptly activates an audible and visual alarm to alert the operator. Simultaneously, the PLC PID control adjusts the filter speed or reduces the iron concentrate pump 8 speed to prevent ore runoff.

[0046] like Figure 6 As shown, monitoring is installed to meet the needs of the work positions. Cameras are installed above the magnetic separator 3, the material distribution box 7, the filter 9, and the conveying mechanism 12. In this embodiment, there are a first camera 2, a second camera 5, and a third camera 10. The number of cameras can be set according to the specific application. They are networked to the existing monitoring system network to achieve real-time network access. The images are transmitted to the remote monitoring center for preview. The remote monitoring center is equipped with a human-machine interface for staff to view and operate. At the same time, multiple frequency converters in the monitoring system are also connected to the field controller to achieve real-time remote monitoring of the process operation.

[0047] A window-based control center configuration screen is established in the remote monitoring center to enable timely archiving of on-site process data, including temperature, current, power parameters, trend curves, operation records, and alarm records, thereby achieving remote control and monitoring of operating parameters.

[0048] WinCC is a popular general-purpose industrial automation configuration software in China. A good configuration can reflect the actual situation on site in a timely manner, which is conducive to employees taking corresponding actions when the situation occurs on site. At the same time, it can realize the timely archiving of process data (parameters such as temperature, current, and power), trend curves, operation records, and alarm records on site.

[0049] The original filter used an electromagnetic speed-regulating motor for speed control. The electromagnetic speed-regulating motor consisted of two parts: a regular squirrel-cage motor and an electromagnetic speed-regulating slip clutch. The clutch had a high failure rate, large speed loss, low efficiency, could not accurately control the speed, and could not communicate with the PLC.

[0050] In this embodiment, as Figure 7 As shown, each filter 9 is connected to a variable frequency motor, which in turn is connected to a frequency converter cabinet. The frequency converter cabinet is connected to the field controller. The frequency of the frequency converter cabinet is given by the remote monitoring center, which feeds back the real-time frequency of the filter 9 to the field controller. The field controller then controls the speed of the filter 9. Replacing the filter with a YVF2 variable frequency motor and frequency converter combination offers advantages such as high efficiency, no additional losses during speed regulation, and energy saving. The frequency converter selected is the Boyang BY800 series frequency converter.

[0051] like Figure 8 As shown, the inverter cabinet 22 is equipped with a selector switch, indicator lights, and operation buttons, which can be used to operate different inverters.

[0052] For the first time, the TCW-12 vacuum permanent magnet cylindrical filter has replaced the "electromagnetic speed regulating motor + controller" control method with the "frequency converter + variable frequency motor" control method, which not only achieves precise speed control, but also realizes automatic control of the filter, achieving equipment automation with a small investment.

[0053] The original iron concentrate pump 8 required on-site adjustment by workers. If the pump motor speed was too high, the slurry would be emptied from the magnetic field; if the motor speed was too low, ore would run off the magnetic field, hindering smooth production. After installing a centralized control system, the inverter frequency can be set from the WinCC configuration screen in the remote monitoring center, and the real-time inverter frequency is fed back to the remote monitoring center. Workers can then easily adjust the iron concentrate pump speed based on the monitoring screen.

[0054] The centralized control system for filtration is added to the original electrical control system. The original electrical control system already has physical interlocks between relay contactors between devices. At the same time, software interlocks are added to the PLC program design to achieve "dual protection" of device interlocks, which improves the reliability of equipment operation.

[0055] The system enables "one-click start / stop" by automatically starting and stopping the filter and belt in the filtration system through program design. This eliminates the need for employees to start each device individually and allows for one-click start / stop of the above equipment from the WinCC configuration interface.

[0056] like Figure 9 As shown, the field controller uses a PLC controller. Analog inputs SM331 (AI): 10 frequency feedback analog signals, 8 current analog signals, and 6 temperature / vibration feedback analog signals, totaling 24 points. Three 8-channel AI input modules (6ES7331-7KF01-0AB0) are selected. Analog outputs SM332 (AO): 8 frequency analog outputs, requiring one 8-channel AI output module (6ES7332-5HF00-0AB0). Digital inputs SM321 (DI): 18 filter switch signals, 18 belt switch signals, and 16 other equipment switch signals, totaling 52 points. Two 32-point DC input DI modules (6ES7321-1BL00-0AA0) are required. Digital output SM322(DO): There are 8 switch inputs for the filter, 8 for the belt, and 18 for other equipment, for a total of 34 points. Two 32-point DC input DI modules (6ES7322-1BL00-0AA0) are required.

[0057] The PLC program was written using Siemens PLC programming software Step7 v5.5. The entire program consists of several main subroutines, such as "equipment start / stop", "data sampling", and "frequency setting", depending on the function. There are not only physical interlocks between relays between devices, but also software interlocks in the PLC program, which greatly enhances the reliability of equipment operation.

[0058] PLC programs are divided into the following control modes:

[0059] 1. Local Manual Mode: Switch the inverter cabinet selector switch to local manual mode.

[0060] Start the BY-800 frequency converter and adjust the frequency converter cabinet button to adjust the frequency converter motor to the appropriate speed according to the liquid level in the overflow tank.

[0061] 2. Remote Manual Mode: Switch the inverter cabinet selector switch to remote control mode, and select "Manual Control" mode in the remote monitoring center configuration screen. Here you can choose the linkage mode between the belt conveyor and the filter. When selecting "Interlock Mode," the belt conveyor must be manually started first, and then the filter can be started. In this mode, if the belt conveyor is not started, the filter cannot start either. If the belt conveyor malfunctions and stops running, the filter will also stop automatically. Selecting "Disconnect Mode" will disconnect the interlock between the belt conveyor and the filter, allowing both the belt conveyor and the filter to start independently. This mode is generally used for single-unit test runs during equipment maintenance. On-site operators adjust the speed of the filter's inverter motor in a timely manner based on the real-time liquid level data fed back by the liquid level sensor in the remote monitoring center configuration screen, achieving remote manual control.

[0062] 3. Remote Automatic Mode: Switch the inverter cabinet selector switch to remote control mode. In the remote monitoring center configuration screen, select "Automatic Control" mode and click the "Start" button. At this time, the PLC will default to interlocking mode for the belt conveyor mechanism and the filter. The PLC performs PID calculations based on the 4-20mA signal fed back from the overflow tank level sensor, stabilizing the speed of the filter's variable frequency motor within the corresponding speed range, while reducing the slurry flow at the overflow port, enabling the filter to operate efficiently. If any equipment in the filter, belt conveyor mechanism, or inverter cabinet malfunctions, alarm information will be displayed promptly in the remote monitoring center configuration screen, and the equipment will stop operating to prevent the fault from escalating.

[0063] Example 2:

[0064] The present invention provides a video monitoring method for a mineral processing filter, comprising the following steps:

[0065] S1: The slurry is first magnetically separated by magnetic separator 3, and then pumped to distribution box 7. Distribution box 7 feeds the ore evenly to each filter 9. The vacuum pump in filter 9 dehydrates the filter cake on the surface of the filter. The filter cake falls to concentrate conveying mechanism 12 and is transported to iron concentrate shed 13 by conveying mechanism 12. The water is transported to emergency pool 16 by filtrate pump.

[0066] S2: Install monitoring according to job requirements. Cameras are installed above the magnetic separator 3, the material distribution box 7, the filter 9 and the conveying mechanism 12. They are networked to the existing monitoring system network to achieve real-time network access and transmit the images to the remote monitoring center for preview, so as to realize real-time remote monitoring of process operation.

[0067] S3: Integrate the original control system of the filter into the video monitoring system. Write a program according to the process control requirements of the equipment. The entire program consists of several main subroutines, namely "one-button start / stop of equipment", "data sampling" and "frequency setting", depending on the function. There are not only physical interlocks between relays between the equipment, but also software interlocks in the program.

[0068] S4: Establish a window control center configuration screen in the remote monitoring center to realize timely archiving of process data on site, including temperature, current, power parameters, trend curves, operation records and alarm records, and realize remote control and monitoring of operating parameters.

[0069] In the description of this invention, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0070] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A video monitoring system for a mineral processing filter machine, characterized in that: The system includes a remote monitoring center, a data transmission node, and a field monitoring device. The field monitoring device is connected to the remote monitoring center through the data transmission node. The field monitoring device includes a magnetic separator (3), a distribution box (7), and a filter (9). The magnetic separator (3) is externally connected to a slurry injector (1). An iron concentrate pump (8) is connected between the distribution box (7) and the filter (9). The slurry is magnetically separated from the magnetic separator (3) and then transported to the distribution box (7) by the iron concentrate pump (8). The distribution box (7) then distributes the slurry to the filter (9) for slurry dewatering. The filter (9) is externally connected to a conveying mechanism (12) and a filtrate pipe (15). The conveying mechanism (12)... 2) The iron concentrate shed (13) is connected, and the end of the filtrate pipe (15) is connected to the emergency pool (16). The filtrate pipe (15) is equipped with a filtrate pump. The iron concentrate powder is transported to the iron concentrate shed (13) by the conveying mechanism (12), and the water is transported to the emergency pool (16) by the filtrate pump. The magnetic separator (3), the material distribution box (7), the filter (9) and the conveying mechanism (12) are all equipped with cameras. The cameras are electrically connected to the field controller (21). The filter (9) is equipped with an overflow trough (19) at the inlet. The overflow trough (19) is equipped with a liquid level sensor (18). The field controller (21) is connected to the liquid level sensor (18). The data transmission node is a wireless network coordinator. The field controller connects to the wireless network coordinator through a self-organizing wireless network. The wireless network coordinator is used to upload the status data of the field monitoring device to the remote monitoring center. The filter (9) includes multiple units. Each filter (9) is connected to a variable frequency motor (23). The variable frequency motor (23) is connected to a filter frequency converter. Multiple filter frequency converters are connected to a frequency converter cabinet (22). The frequency converter cabinet (22) is connected to the field controller (21). The frequency of each filter frequency converter in the frequency converter cabinet (22) is given from the remote monitoring center. The remote monitoring center feeds back the real-time frequency of the filter (9) to the field controller (21). The field controller (21) controls the rotation speed of the filter (9). Each iron concentrate pump (8) motor is connected to an iron concentrate pump frequency converter. The iron concentrate pump frequency converter is connected to the field controller. The frequency of the iron concentrate pump frequency converter is given from the remote monitoring center. The remote monitoring center feeds back the real-time frequency of the iron concentrate pump (8) to the field controller, and the field controller controls the speed of the iron concentrate pump (8). The filter machine frequency converter and the iron concentrate pump frequency converter are equipped with a conversion switch. The conversion switch is connected to the digital input contact of the frequency converter and the digital input contact of the frequency converter is defined as analog signal control to realize one-key switching of frequency modulation signal. A window control center configuration screen is established in the remote monitoring center to realize timely archiving of process data on site, including temperature, current, power parameters, trend curves, operation records and alarm records, to realize remote control and monitoring of operating parameters. The original control system of the mineral processing filter is integrated into the video monitoring system. The program is written according to the process control requirements of the equipment. The entire program consists of subroutines of "one-key start and stop of equipment", "data sampling" and "frequency setting" according to different functions. There is not only physical interlock between relays between the equipment, but also software interlock in the program.

2. The video monitoring system for a mineral processing filter machine according to claim 1, characterized in that: The magnetic separator (3) includes multiple stages. The end of the magnetic separator (3) is connected to a feeding channel (6). The end of the feeding channel (6) is connected to multiple distribution pipes (17). The iron concentrate pump (8) is installed on the distribution pipes (17).

3. The video monitoring system for a mineral processing filter machine according to claim 1, characterized in that: The conveying mechanism (12) is a belt conveyor, and the front end and rear end of the conveying mechanism (12) are respectively connected to the discharge port (11) and the outlet (14).

4. The video monitoring system for a mineral processing filter machine according to claim 1, characterized in that: The overflow tank (19) is provided with a vertically arranged baffle (20). The baffle (20) is not connected to the bottom of the overflow tank (19). The baffle (20) divides the middle part of the overflow tank (19) into an overflow area. An overflow port (24) is provided on the outside of the overflow area. A liquid level sensor (18) is provided in the overflow area. An alarm is connected to the field controller.

5. The video monitoring system for a mineral processing filter machine according to claim 1, characterized in that: The field controller is a PLC controller.

6. A video monitoring method for a mineral processing filter, applied to the video monitoring system for a mineral processing filter as described in any one of claims 1-5, characterized in that: The method includes the following steps: S1: The slurry is first magnetically separated by a magnetic separator (3), and then pumped to a distribution box (7). The distribution box (7) feeds the ore evenly to each filter (9). The vacuum pump in the filter (9) dehydrates the filter cake on the surface of the filter. The filter cake falls to the concentrate conveying mechanism (12) and is transported by the conveying mechanism (12) to the iron concentrate shed (13). The water is pumped to the emergency pool (16) by the filtrate pump. S2: Install monitoring according to job requirements. Install cameras above the magnetic separator (3), the material box (7), the filter (9) and the conveying mechanism (12), and connect them to the network of the monitoring system in use to realize real-time network access. Transmit the images to the remote monitoring center for preview and realize real-time remote monitoring of process operation. S3: Integrate the original control system of the filter into the video monitoring system, write the program according to the process control requirements of the equipment. The entire program consists of subroutines for one-button start / stop of the equipment, data sampling and frequency setting, depending on the function. There are not only physical interlocks between relays between the equipment, but also software interlocks in the program. S4: Establish a window control center configuration screen in the remote monitoring center to realize timely archiving of process data on site, including temperature, current, power parameters, trend curves, operation records and alarm records, and realize remote control and monitoring of operating parameters.

Images