A laser-based on-line monitoring device for slurry particle size

Abstract

A laser method slurry particle size online monitoring device, the slurry sample taken by the secondary sampler is monitored by the laser measurement system through the automatic circulation sampling system. The laser measurement system includes: control module and mounting plate, laser measurement base, rubber shock-absorbing seat, integrated optical path lens barrel, lens barrel seat, slurry inlet, flow sample pool, slurry outlet, flow sample pool bracket, alignment aperture, linear auxiliary detector, CCD camera and automatic centering system. The automatic circulation sampling system and the laser measurement system are used to realize the online measurement of slurry particle size. The data detected by the laser measurement system are processed and fed back to the production control center to adjust the operation parameters, thereby optimizing the production adjustment, saving energy consumption, reducing production costs and improving production efficiency.

Description

Technical Field

[0001] The utility model belongs to the technical field of ore pulp particle size control in ore dressing process, and specifically relates to an online monitoring device for ore pulp particle size using a laser method. Background Art

[0002] In the process of mineral processing, the size distribution and morphological characteristics of slurry particles are important factors affecting product performance. They can not only reflect the working conditions of mineral processing equipment, but also affect the beneficiation effect of subsequent beneficiation equipment, and can also reflect whether the energy consumption of the mill is within a reasonable range. Too coarse or too fine particle size is not conducive to the efficient operation of the grinding and flotation process. Therefore, monitoring of slurry particle size is an indispensable part of the beneficiation plant, which can guide technical management personnel to better control the entire production process. Online monitoring of particle size provides feedback parameters for the control of the beneficiation automation process, and then controls it near the optimal value, which helps to improve the grinding efficiency and separation indicators.

[0003] At present, the detection of grinding particle size in mineral processing mainly relies on manual offline measurement, which has a certain lag in the adjustment of production process parameters. Utility Model Content

[0004] In order to overcome the above shortcomings, the utility model provides a laser method slurry particle size online monitoring device.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A laser method slurry particle size online monitoring device, which monitors the particle size of the slurry sample taken by the secondary sampler through an automatic circulation sampling system and a laser measurement system. The laser measurement system comprises: a control module and a mounting plate, a laser measurement base, a rubber shock-absorbing seat, an integrated optical path lens barrel, a lens barrel seat, a slurry inlet, a flow sample pool, a slurry outlet, a flow sample pool bracket, an alignment diaphragm, a linear auxiliary detector, a CCD camera and an automatic centering system. The control module and the mounting plate, the lens barrel seat, the flow sample pool bracket, the alignment diaphragm, the linear auxiliary detector, the CCD camera, and the automatic centering system are all fixed on the laser measurement base, the rubber shock-absorbing seat is installed below the laser measurement base, and the integrated optical path lens barrel is installed on the lens barrel seat.

[0007] Further optimized, the automatic circulating sampling system is used to dilute the sample collected by the secondary sampler multiple times to form a thin sample layer.

[0008] Further optimized, the slurry inlet and the slurry outlet are both connected to the flow sample pool through threads.

[0009] Further optimization, the control module and the mounting plate are the control logic unit of the laser measurement system; the integrated optical path lens barrel is used to emit laser, and becomes a beam of parallel light after filtering, beam expansion and collimation; the alignment aperture is the light hole through which the laser passes after irradiating the sample; the linear auxiliary detector is used to increase the maximum measurable outer ring radius size of the main detector, thereby expanding the scattering angle of the received measurement light and further expanding the measurement range; the CCD camera is used to measure the intensity of scattered light; the automatic centering system realizes the optical path centering by controlling the movement of the centering system in four directions: up, down, left and right, so that the light intensity of the detector at the center of the fan-shaped detector is maximized.

[0010] Further optimization also includes slurry pipelines, primary samplers, sampling buckets, flushing pipelines, and control systems.

[0011] The beneficial effects of the utility model are:

[0012] 1. The automatic cycle sampling system and the laser measurement system are used to measure the slurry particle size online. The data detected by the laser measurement system are processed and fed back to the production control center to adjust the operating parameters, thereby optimizing production adjustments, saving energy consumption, reducing production costs, and improving production efficiency.

[0013] 2. The core components of laser measurement are fixed on the same mounting beam as a whole, which ensures the accuracy of assembly and measurement, increases the rigidity of the equipment, and the alignment aperture and automatic centering device simultaneously ensure the accuracy of signal reception and enhance the stability of the device.

[0014] 3. The stirring motor is directly connected to the stirring rod, which simplifies the transmission structure, ensures the stability of stirring, reduces the transmission noise, and the stirring system is easy to disassemble and assemble, with modular design, which is easy to maintain;

[0015] In summary, the utility model adopts a laser measurement system, which has accurate measurement data, a wide measurement range, and a full-scale particle size distribution grade, and does not require calibration, which is helpful to improve the intelligence level of the ore dressing plant and the development of smart mines. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 It is a structural schematic diagram of the automatic cycle injection system;

[0018] Figure 3 It is the structural diagram of the laser measurement system;

[0019] Figure 4 It is a system flow chart of the utility model;

[0020] Figure 5This is a process diagram for detecting slurry particle size of the utility model;

[0021] Markings in the figure: 1. Slurry pipeline, 2. Primary sampler, 2.1. Sampling cylinder, 2.2. Upper flushing valve, 2.3. Lower flushing valve, 2.4 Sampling valve, 3. Secondary sampler, 4. Sampling bucket, 5. Flushing water pipeline, 6. Automatic circulation sampling system, 6.1. Stirring motor, 6.2. Stirring rod, 6.3. Circulating pool, 6.4. Fork frame, 6.5. Mounting frame, 6.6. Liquid level meter, 6.7. Ultrasonic vibration device, 6.8. Water inlet, 6.9. Mounting plate, 6. 10. Electric valve, 6.11. Overflow pump, 6.12. Circulation pump, 6.13. Liquid outlet, 7. Laser measurement system, 7.1. Control module and mounting plate, 7.2. Laser measurement base, 7.3. Rubber shock-absorbing seat, 7.4. Integrated optical path lens barrel, 7.5. Lens barrel seat, 7.6. Slurry inlet, 7.7. Flow sample pool, 7.8. Slurry outlet, 7.9. Flow sample pool bracket, 7.10. Alignment aperture, 7.11. Linear auxiliary detector, 7.12. CCD camera, 7.13. Automatic centering system, 8. Particle size analyzer control box, 9. Data processing server, 10. Production control center, 11. Cloud platform and mobile client, 12. Ball mill. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention.

[0023] A laser method slurry particle size online monitoring device comprises a slurry pipeline 1, a primary sampler 2, a secondary sampler 3, a sampling bucket 4, a flushing pipeline 5, an automatic circulation sampling system 6, a laser measurement system 7, and a control system 8. The primary sampler 2 is installed on the slurry pipeline 1, and the primary sampler 2 comprises a sampling cylinder 2.1, an upper flushing valve 2.2, a lower flushing valve 2.3, and a sampling valve 2.4. The primary sampler 2 takes out a test sample from the slurry pipeline 1, and its flow rate is relatively large. The secondary sampler 3 is used to take out a small representative part of the sample taken out by the primary sampler 2 for real-time detection by the device. The automatic circulation sampling system 6 is used to add water to the secondary sampling sample to dilute it multiple times to form a thin sample layer, reach the transmittance balance point, and ensure good measurement accuracy. The dilution process is carried out in the circulation pool through a stirring device and an ultrasonic vibration device 6.7. The ultrasonic vibration device 6.7 has the following functions: first, to disperse the ore pulp in the dilute solution to ensure that the ore pulp particles are evenly dispersed during the measurement process; second, to remove the bubbles in the solution and eliminate the influence of the bubbles on the laser measurement. The stirring device is to mix the measured particles evenly in the dilute solution, disperse the particle clusters, and keep the particles in the state of one particle as much as possible, so as to fully receive the light source, project the particle information spectrum onto the photoelectric detector, detect as much particle information as possible, and accurately obtain the particle size distribution.

[0024] The automatic circulation injection system 6 includes an inlet and outlet component, an ultrasonic vibration device 6.7, a fork frame 6.4, a mounting frame 6.5, a liquid level meter 6.6, a mounting plate 6.9, an electric valve 6.10, a circulation pump 6.12, a stirring device, a circulation pool 6.3 and an overflow device. The stirring device includes a stirring motor 6.1 and a stirring rod 6.2. The stirring motor 6.1 is mounted on the fork frame 6.4. The fork frame 6.4 is a tripod fixed on the inner wall of the circulation pool 6.3 and used to fix the stirring motor 6. 1, the stirring rod 6.2 passes through the fork frame 6.4 and is connected to the stirring motor 6.1, the stirring motor 6.1 drives the stirring rod 6.2 to stir the slurry in the circulation tank 6.3, the circulation tank 6.3 is installed in the mounting frame 6.5, and is a container for slurry dilution and stirring, the liquid level meter is installed on the outer wall of the circulation tank 6.3, and is used to monitor the liquid level of the circulation tank 6.3, the ultrasonic vibration device is installed on the mounting frame 6.5 and is located directly below the circulation tank 6.3, and the mounting plate 6.9 is welded to one side of the mounting frame 6.5.

[0025] The electric valve 6.10, overflow pump 6.11 and circulation pump 6.12 are all installed on the mounting plate 6.9. The electric valve 6.10 controls the on-off of the pipeline and cooperates with the control system to change the flow direction of the slurry. The overflow pump 6.11 sucks and discharges the slurry in the circulation pool. The circulation pump 6.12 is used for the slurry to flow between the laser measurement system and the circulation pool.

[0026] The water inlet 6.8 and the liquid outlet 6.13 are respectively arranged at the upper and lower sections of the circulation pool 6.3. The water inlet 6.8 serves as the inlet of the dilution water and also as the inlet of the circulating sample. The liquid outlet 6.13 serves as the inlet of the overflow pump 6.11 for pumping liquid and also as the inlet of the circulating sample. The overflow device includes a liquid level sensor and an overflow pump. When the liquid level reaches the position of the liquid level sensor, the overflow pump is activated to pump water outward.

[0027] The laser measurement system includes a control module and mounting plate 7.1, a laser measurement base 7.2, a rubber shock-absorbing seat 7.3, an integrated optical path lens barrel 7.4, a lens barrel seat 7.5, a slurry inlet 7.6, a flow sample pool 7.7, a slurry outlet 7.8, a flow sample pool bracket 7.9, an alignment aperture 7.10, a linear auxiliary detector 7.11, a CCD camera 7.12 and an automatic centering system 7.13. The control module and mounting plate 7.1 are the control logic unit of the laser measurement system; the integrated optical path lens barrel 7.4 is used to emit laser light, and after filtering, beam expansion and collimation, it becomes a beam of parallel light; the alignment aperture 7.10 is the light hole through which the laser passes after irradiating the sample; the linear auxiliary detector 7.11 is used to further expand the measurement range; the CCD camera 7.12 is used to measure the intensity of scattered light; the automatic centering system 7.13 realizes the centering of the optical path by controlling the movement of the centering system in the four directions of up, down, left and right to maximize the light intensity of the detector at the center of the fan-shaped detector.

[0028] The control module and the mounting plate 7.1, the lens barrel seat 7.5, the flow sample pool bracket 7.9, the alignment aperture 7.10, the linear auxiliary detector 7.11, the CCD camera 7.12, and the automatic centering system 7.13 are all fixed on the laser measurement base 7.2, the rubber shock-absorbing seat 7.3 is installed below the laser measurement base 7.2, the integrated optical path lens barrel 7.4 is installed on the lens barrel seat 7.5, and the slurry inlet 7.6 and the slurry outlet 7.8 are both connected to the flow sample pool 7.7 through threads.

[0029] The integrated optical path lens barrel 7.4 includes a fiber laser, a fiber output collimating lens, and a Fourier lens.

[0030] A monitoring method of a laser-based slurry particle size online monitoring device is:

[0031] S1. After the production control center issues a test command, under the control of the particle size analyzer control box, the automatic circulation sampling system 6 starts to fill water to the specified liquid level, and the stirring motor 6.1 and the ultrasonic vibration device 6.7 start working;

[0032] S2, the sampling valve of the primary sampler 2 is opened, the slurry flows into the secondary sampler 3, and the secondary sampler 3 intercepts a part of it and flows into the circulation pool 6.3;

[0033] S3, the circulation pump 6.12 starts working, pumping the diluted slurry into the flow sample pool 7.7, and the laser measurement system 7 starts working;

[0034] S4, integrated optical path lens tube 7.4 emits laser light through flow sample pool 7.7, and after scattering, the laser light is captured by CCD camera 7.12 and linear auxiliary detector 7.11. The system calculates the slurry particle size according to the algorithm and uploads it to the control center;

[0035] S5. After the slurry data collection is completed, the system starts to flush all pipelines. The upper flushing valve 2.2 and the lower flushing valve 2.3 of the primary sampler 2 are opened, and the sampling valve 2.4 is closed. Clean water is flushed along the pipeline to the secondary sampler 3 and then discharged.

[0036] S6, the automatic circulation sampling system 6 starts to fill water to the specified liquid level, and the stirring motor 6.1 and the ultrasonic vibration device 6.7 start to work;

[0037] S7, the electric valve 6.10 changes the flow direction of the pipeline, and the circulation pump 6.12 works to discharge the liquid;

[0038] S8. After the cleaning operation is repeated twice, the circulation pump 6.12 stops operating, the current operation process ends, and the next slurry data collection work is prepared.

[0039] In the utility model, under the control of the particle size analyzer control box 8, the data processing server 9 can obtain the final slurry particle size distribution through calculation. According to the construction conditions on site, if there are no wired data transmission conditions such as optical fiber, the wireless communication mode can be selected to upload the data to the production control center via Bluetooth, WiFi or other frequency band dedicated networks. The production control center 10 adjusts the feeding parameters of the ball mill 12 according to the size and proportion of the slurry particle size, such as changing the feed amount and water intake, so as to change the load of the ball mill 12 and the slurry concentration, thereby changing the subsequent slurry particle size and realizing the online adaptive adjustment of the slurry particle size. The production control center uploads the slurry particle size data to the cloud platform and mobile client 11 for relevant personnel to observe the slurry particle size data.

[0040] The utility model can realize the functions of automatic sampling, automatic dilution, automatic measurement, automatic discharge, automatic cleaning, remote transmission of measurement results, long-term unattended operation, etc. through the automatic circulation sampling system 6, replacing manual sampling and detection operations; by adopting the laser measurement system, the measurement data is accurate, the measurement range is wide, the particle size distribution grade of the measurement result is the full particle grade, and no calibration is required.

[0041] The above shows and describes the main features, methods of use, basic principles and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model will also have various changes and improvements according to actual conditions, and these changes and improvements fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A laser method slurry particle size online monitoring device, characterized in that: The slurry sample taken by the secondary sampler (3) is passed through the automatic circulation sampling system (6) and the laser measurement system (7) for particle size monitoring. The laser measurement system comprises: a control module and a mounting plate (7.1), a laser measurement base (7.2), a rubber shock-absorbing base (7.3), an integrated optical path lens barrel (7.4), a lens barrel base (7.5), a slurry inlet (7.6), a flow sample pool (7.7), a slurry outlet (7.8), a flow sample pool bracket (7.9), an alignment aperture (7.10), a linear auxiliary detector (7.11), The control module and mounting plate (7.1), the lens barrel seat (7.5), the flow sample pool support (7.9), the alignment aperture (7.10), the linear auxiliary detector (7.11), the CCD camera (7.12), and the automatic centering system (7.13) are all fixed on the laser measurement base (7.2); the rubber shock-absorbing seat (7.3) is installed below the laser measurement base (7.2); and the integrated optical path lens barrel (7.4) is installed on the lens barrel seat (7.5).

2. The laser method slurry particle size online monitoring device according to claim 1, characterized in that: The automatic circulating sample injection system (6) is used to dilute the sample collected by the secondary sampler (3) multiple times to form a thin sample layer.

3. The laser method slurry particle size online monitoring device according to claim 1, characterized in that: The slurry inlet (7.6) and the slurry outlet (7.8) are both connected to the flow sample pool (7.7) via threads.

4. The laser method slurry particle size online monitoring device according to claim 1, characterized in that: The control module and the mounting plate (7.1) are control logic units of the laser measurement system; the integrated optical path lens barrel (7.4) is used to emit laser light, which is converted into a beam of parallel light after filtering, beam expansion and collimation; the alignment aperture (7.10) is the light hole through which the laser passes after irradiating the sample; the linear auxiliary detector (7.11) is used to increase the maximum measurable outer ring radius size of the main detector, thereby expanding the receiving measurement light scattering angle and further expanding the measurement range; the CCD camera (7.12) is used to measure the scattered light intensity; the automatic centering system (7.13) realizes the optical path centering by controlling the movement of the centering system in four directions: up, down, left and right, so that the light intensity of the detector at the center of the fan-shaped detector is maximized.

5. The laser method slurry particle size online monitoring device according to claim 1, characterized in that: It also includes a slurry pipeline (1), a primary sampler (2), a sampling bucket (4), a flushing pipeline (5), and a control system (8).

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