Constant-pressure pneumatic automatic dosing device and method for flotation machine

Abstract

The invention relates to the technical field of application of drug feeding systems of flotation machines, and provides a constant-pressure pneumatic automatic drug feeding device and method for a flotation machine. A chemical inlet of the chemical filter box is connected with a chemical outlet of the low-level chemical storage box through a first pipeline; the low-flow medicament pump is mounted on the first pipeline; a chemical inlet of the high-position constant-pressure chemical feeding box is connected with a chemical outlet of the chemical filtering box, and an overflow opening is formed in the upper portion of a box body of the high-position constant-pressure chemical feeding box and connected to the low-position chemical storage box through a backflow pipeline; a chemical inlet of at least one pneumatic chemical feeding valve is connected with a chemical outlet in the bottom of the high-level constant-pressure chemical feeding box through a pipeline; a chemical outlet of the pneumatic chemical adding valve is communicated with a chemical inlet of the flotation machine through a second pipeline; according to the chemical feeding device, chemicals can be accurately fed into all chemical feeding points, and mechanical faults and chemical fluctuation of other chemical feeding modes are avoided through continuous filtering of the chemical filtering box, direct-current feeding of the high-position constant-pressure chemical feeding box and powerful opening and closing of the pneumatic valve.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of flotation machine dosing system application, in particular to a constant-pressure pneumatic automatic dosing device and method for a flotation machine. BACKGROUND

[0002] The dosing operation of a flotation machine is an auxiliary process in the flotation operation in a beneficiation process, and the purpose is to add various reagents required in the flotation process in a timely manner according to the quantity and concentration requirements, so as to meet the reagent system requirements of the beneficiation operation and make the beneficiation effect optimal. The high-efficiency, accurate and reliable dosing of the dosing box can simplify the original manual operation procedure, greatly improve the accuracy, precision and reliability of the reagent addition, eliminate the errors caused by human factors, reduce the production cost and improve the economic and technical indicators of the beneficiation.

[0003] Therefore, in view of the above problems, a constant-pressure pneumatic automatic dosing device and method for a flotation machine are provided. SUMMARY

[0004] The present application aims to overcome the defects of the low dosing efficiency and inaccurate dosing quantity of the existing flotation dosing equipment, and provide a constant-pressure pneumatic automatic dosing device and method for a flotation machine to solve the problem of inaccurate automatic metering and dosing.

[0005] In order to solve the above technical problems, the present application provides the following technical solutions:

[0006] A constant-pressure pneumatic automatic dosing device for a flotation machine comprises:

[0007] A low-position reagent storage tank for storing configured reagents.

[0008] A reagent filtering tank, whose reagent inlet is connected to the reagent outlet of the low-position reagent storage tank through a first pipeline, is used to filter impurities and small particles of unsolved reagents in the reagents.

[0009] A low-flow reagent pump installed on the first pipeline is used to continuously pump the reagents from the low-position reagent storage tank into the reagent filtering tank.

[0010] A high-position constant-pressure dosing tank, whose reagent inlet is connected to the reagent outlet of the reagent filtering tank, is provided with an overflow port on the upper part of the tank body, and the overflow port is connected to the low-position reagent storage tank through a reflux pipeline to maintain a constant liquid level in the tank and form a constant-pressure reagent source.

[0011] At least one pneumatic dosing valve, the medicine inlet of which is connected to the medicine outlet of the high-position constant-pressure dosing tank through a pipeline.

[0012] A flotation machine, the medicine outlet of the pneumatic dosing valve is communicated with the medicine inlet of the flotation machine through a second pipeline.

[0013] A medicine flow meter, which is installed on the second pipeline, is used to detect and feedback the actual dosing flow in real time.

[0014] Further, an automatic control system is also included, which comprises a programmable controller and terminal equipment in communication connection with the programmable controller; the programmable controller is in signal connection with the medicine flow meter and the pneumatic dosing valve, and is used to control the opening and closing frequency or the single opening duration of the pneumatic dosing valve according to the preset dosing amount and the real-time signal received by the medicine flow meter, so as to realize accurate dosing.

[0015] Further, a vertical partition plate is arranged inside the tank body of the medicine filtering tank, and a filtering screen is installed on the vertical partition plate.

[0016] A sealing cover plate is installed on the top of the tank body of the medicine filtering tank, and the bottom plate of the tank body is preset with an inclination angle, and a residue discharge valve is installed at the lowest position.

[0017] The inside of the tank body of the medicine filtering tank is divided into a medicine inlet cavity and a medicine outlet cavity in parallel, and the medicine inlet cavity and the medicine outlet cavity are respectively connected with a medicine inlet and a medicine outlet.

[0018] Further, the high-position constant-pressure dosing tank is a rectangular tank body, and a partition baffle is welded inside the tank body along the length direction, and the height of the partition baffle is lower than the height of the tank body, and the upper part of the tank body is communicated, which is used to stabilize the liquid flow and reduce disturbance.

[0019] Further, a time relay for controlling the opening and closing of the pneumatic dosing valve is also included, and specifically, the programmable controller controls the opening and closing action of the pneumatic dosing valve by controlling the time relay.

[0020] Further, the low-position medicine storage tank, the medicine filtering tank and the high-position constant-pressure dosing tank are all lined with a corrosion-resistant layer.

[0021] Further, a medicine stirring barrel for configuring medicine is also included, and the medicine stirring barrel is communicated with the low-position medicine storage tank through a pipeline.

[0022] Further, the effective volume of the low-position medicine storage tank is not less than 1.5 times of the single medicine stirring configuration amount.

[0023] A constant-pressure pneumatic automatic dosing method for a flotation machine, the dosing device comprises the following steps:

[0024] S1. After the reagent is prepared in the reagent mixing tank, it is transported to the low-level reagent storage tank for storage.

[0025] S2. Start the low-flow reagent pump to continuously pump the prepared reagent stored in the low-level reagent storage tank into the reagent filter box through the first pipeline for filtration.

[0026] S3. The filtered medicine flows into the high-level constant pressure dosing tank, and the excess medicine returns to the low-level medicine storage tank through the overflow port and return pipe to maintain the stability of the liquid level in the high-level constant pressure dosing tank.

[0027] S4. The automated control system controls the opening and closing of the pneumatic dosing valve according to preset parameters so that the agent flows into the second pipeline.

[0028] S5. The drug flow meter monitors the flow rate in the second pipeline in real time and feeds the signal back to the automatic control system. The automatic control system dynamically controls the opening and closing frequency and single opening duration of the pneumatic dosing valve according to the actual flow rate and the preset flow rate, so as to accurately control the drug flow rate.

[0029] S6. The reagent flows into the flotation machine through the second pipe and the inlet of the flotation machine.

[0030] Furthermore, in step S2, the slag discharge valve at the bottom of the reagent filter box is opened periodically to remove deposited impurities.

[0031] The beneficial effects of the technical solution provided by the embodiments of the present invention are as follows:

[0032] The invention ensures reagent delivery and purity through a low-flow reagent pump and reagent filter box. The overflow port of the high-level constant-pressure dosing tank, in conjunction with the return pipe, maintains a constant reagent level and ensures stable reagent pressure within the tank. An automated control system, based on a programmable logic controller (PLC), collects signals from the reagent flow meter in real time and dynamically adjusts the opening and closing of the pneumatic dosing valve to achieve feedback control of the dosing flow. This invention overcomes the drawbacks of traditional dosing methods, such as large pressure fluctuations, low precision, and reliance on manual labor. It achieves a comprehensive effect of fully automated dosing, high-precision flow control, and high reliability in long-term operation. Furthermore, it improves the accuracy and efficiency of reagent feeding in flotation machines, enhancing the feed conditions for flotation with high requirements. It significantly improves the quality and efficiency of flotation separation of refractory minerals, providing precise flotation dosing results. Attached Figure Description

[0033] Figure 1 This is a diagram of the flotation machine dosing system in an example of the present invention.

[0034] Figure 2This is a front view of the pharmaceutical filter box in an example of the present invention.

[0035] Figure 3 This is a side view of the pharmaceutical filter box, an example of the present invention.

[0036] Figure 4 This is a top view of the pharmaceutical filter box, an example of the present invention.

[0037] Figure 5 This is a front view of the high-pressure constant-pressure drug delivery box, an example of the present invention.

[0038] Figure 6 This is a side view of the high-pressure constant-pressure drug delivery box, an example of the present invention.

[0039] Figure 7 This is a top view of the high-pressure constant-pressure drug delivery box, an example of the present invention.

[0040] Figure 8 This is a schematic diagram of the automatic drug dosing control system in Xiyong, as an example of the present invention.

[0041] In the diagram: 1. Low-level reagent storage tank; 2. Reagent filter tank; 3. First pipeline; 4. Low-flow reagent pump; 5. High-level constant-pressure dosing tank; 6. Overflow port; 7. Return pipeline; 8. Pneumatic dosing valve; 9. Flotation machine; 10. Second pipeline; 11. Reagent flow meter; 12. Vertical grid plate; 13. Sealing cover plate; 14. Slag discharge valve; 15. Baffle plate. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] It should be noted that in the description of this invention, the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" 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.

[0044] Furthermore, it should be understood that, for ease of description, the dimensions of the various components shown in the accompanying drawings are not drawn to actual scale.

[0045] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined or described in one figure, it will not need to be discussed or described in detail in the description of the subsequent figures.

[0046] like Figure 1 As shown, the present invention provides a technical solution: a constant pressure pneumatic automated dosing device for a flotation machine 9, comprising:

[0047] Low-level medicine storage box 1 is used to store the prepared medicine.

[0048] Preferably, the low-level drug storage box 1 is a cylinder welded from 4 mm steel plate, with a diameter of 2 meters and a height of 2 meters. A circular hole of 1 meter is opened at the top of the box, through which the drug delivery tube is welded. The bottom opening is welded to the first pipe 3. The drug delivery box should be designed with appropriate volume and shape according to the different types of drugs, dosages, and corrosiveness of the drugs, and should be made of appropriate anti-corrosion materials.

[0049] The reagents are buffered and stored in the low-level reagent storage box 1 to ensure that the subsequent equipment can obtain a continuous and stable supply of reagents, thereby improving the production flexibility of the equipment.

[0050] The drug filter box 2 has its inlet connected to the outlet of the low-level drug storage box 1 via a first pipe 3. It is used to filter impurities and undissolved small particles in the drug, effectively preventing blockage and wear of subsequent components, extending the service life of the equipment, and reducing the failure rate.

[0051] A low-flow-rate agent pump 4 is installed on the first pipeline 3 to continuously pump the agent from the low-level agent storage tank 1 into the agent filter tank 2.

[0052] The low-flow-rate drug pump 4 replenishes the drug to the high-pressure constant-pressure drug tank 5 with a continuous and stable low flow rate, maintaining the stability of the constant-pressure source, reducing the hydraulic impact on the subsequent filtration system and tank, and improving the stability and durability of the entire drug supply chain.

[0053] The high-level constant-pressure drug delivery box 5 has its inlet connected to the outlet of the drug filter box 2. The upper part of the box is provided with an overflow port 6, which is connected to the low-level drug storage box 1 through a return pipe 7 to maintain a constant liquid level in the box and form a constant-pressure drug source.

[0054] By cooperating with the overflow port 6 of the high-level constant pressure dosing tank 5 and the return pipe 7, the liquid level of the drug in the high-level constant pressure dosing tank 5 is kept constant, thereby ensuring that the drug flowing to the subsequent device has a constant pressure, preventing the problem of flow rate reduction due to liquid level drop, and providing a basis for accurate measurement by the subsequent drug flow meter 11.

[0055] At least one pneumatic dosing valve 8 has its inlet connected to the outlet at the bottom of the high-level constant-pressure dosing tank 5 via a pipeline.

[0056] The flotation machine 9 has its outlet of the pneumatic dosing valve 8 connected to its inlet via a second pipe 10.

[0057] The chemical flow meter 11 is installed on the second pipeline 10 to detect and provide feedback on the actual chemical flow rate in real time, and to dynamically monitor the chemical dosing process so as to provide a basis for subsequent control of the chemical flow rate.

[0058] Preferably, such as Figure 8 As shown, it also includes an automated control system, which includes a programmable controller and a terminal device that is communicatively connected to the programmable controller.

[0059] The programmable controller is connected to the drug flow meter 11 and the pneumatic dosing valve 8. The programmable controller is used to control the opening and closing frequency or the duration of each opening of the pneumatic dosing valve 8 according to the preset dosage and the real-time signal received from the drug flow meter 11, so as to achieve accurate drug administration.

[0060] More preferably, the pneumatic dosing valve 8 is switched on and off by a time relay electromagnetic coil, and the time relay is fed an operating signal by the same automatic control system.

[0061] In this embodiment, the terminal device connected to the programmable controller is a touch screen industrial control computer, which integrates operation and monitoring. It is small in size and can be operated directly on the touch screen interface, which is very convenient and suitable for use in harsh field environments. It can monitor, modify, and set parameters for each dosing point, and adjust the dosing amount in real time. It can record and store dosing data and print reports as needed. If the system malfunctions, it can issue an alarm signal at any time.

[0062] The programmable controller monitors each drug flow meter 11 in real time, communicates with the computer interface, processes various data, and drives the time relay. Based on the signal from the automatic control system, it controls the opening and closing of the pneumatic dosing valve 8. Specifically, when the pneumatic dosing valve 8 is opened by the time relay, the amount of drug dispensed within the same time period is the same. In this way, the automatic control system controls the execution time relay to maintain the same dosing time in each dosing cycle. By changing the interval, the amount of drug can be adjusted.

[0063] Preferably, such as Figures 2 to 4 As shown, the inside of the medicine filter box 2 is provided with a vertical grid plate 12, and a filter screen is installed on the vertical grid plate 12.

[0064] The reason for installing the screen on the filter screen is to facilitate the flexible selection and replacement of filter screens with different mesh sizes according to the size of impurity particles in the medicine, thereby improving the adaptability of the device.

[0065] In this embodiment, the vertical grid 12 plate is installed inside the reagent filter box 2 by two symmetrical angle steels.

[0066] The top of the pharmaceutical filter box 2 is equipped with a sealing cover plate 13, and the bottom plate of the pharmaceutical filter box 2 is preset at an inclined angle, and a slag discharge valve 14 is installed at the lowest point.

[0067] The top sealing cover 13 can effectively prevent the chemical vapor from escaping into the working environment and thus posing a personal safety hazard to the staff, and can also prevent external pollutants from entering the chemical filter box 2 and causing pollution.

[0068] In this embodiment, the sealing cover 13 is bolted to the top of the pharmaceutical filter box 2.

[0069] Impurities that are screened and naturally settled will gather along the slope to the lowest point under the action of gravity. The deposited impurities will be quickly discharged through the slag discharge valve 14 at the lowest point, which will prevent impurities from accumulating and hardening at the bottom of the tank for a long time, thereby improving the stability of the equipment.

[0070] The interior of the drug filter box 2 is divided into a parallel drug inlet chamber and a drug outlet chamber, which are respectively connected to a drug inlet and a drug outlet.

[0071] The reagent filter box 2 should be designed with appropriate volume and shape according to different types of reagents, dosage and corrosiveness, and should be made of appropriate anti-corrosion materials.

[0072] In this embodiment, the drug filter box 2 is a 600mm×600mm square box, the filter screen is 60 mesh, the top of the drug filter box 2 has a 400mm×200mm flange opening and is sealed with screws and a cover plate. The first pipe 3 is welded to the drug inlet of the drug filter box 2, and the second pipe 10 is welded to the drug outlet of the drug filter box 2.

[0073] Preferably, such as Figures 5 to 7 As shown, the high-pressure constant-pressure drug delivery box 5 is a rectangular box with a partition baffle 15 welded inside along its length. The height of the partition baffle 15 is lower than the height of the box, connecting the upper part of the box to stabilize the liquid flow and reduce disturbance.

[0074] The high-pressure constant-pressure dosing box 5 is divided into a buffer chamber and a dispensing chamber by the partition baffle 15. The liquid medicine needs to pass through the area connecting the buffer chamber and the dispensing chamber to enter the dispensing chamber from the buffer chamber. When the liquid medicine enters the buffer chamber, it will inevitably cause disturbance. The connecting port on the partition baffle 15 plays a buffering role for the liquid medicine, making the liquid surface of the liquid medicine entering the dispensing chamber stable, which provides a better basis for the accurate detection of the subsequent flow rate. Moreover, the partition baffle 15 is a welded component with extremely low manufacturing cost.

[0075] In this embodiment, the high-pressure constant-pressure drug delivery box 5 is a rectangular box with a length of 2 meters, a width of 0.8 meters, and a height of 1.5 meters. The partition baffle 15 has a height of 0.35 meters and a length of 2 meters and is welded to the middle of the box.

[0076] Preferably, the low-level drug storage box 1, the drug filter box 2, and the high-level constant pressure drug delivery box 5 are all lined with an anti-corrosion layer.

[0077] Chemical agents typically have complex chemical properties and may contain corrosive components. Ordinary materials may corrode upon prolonged contact with certain agents. By lining all the boxes with a special anti-corrosion material that does not react with the chemicals being treated, the service life of the boxes is ensured, and leakage caused by corrosion is avoided, which would lead to emergency repairs, production stoppages, and replacements, resulting in huge losses.

[0078] More preferably, it also includes a reagent mixing tank for preparing the reagent, the reagent mixing tank being connected to the low-level reagent storage tank 1 via a pipe.

[0079] After the reagent is prepared in the reagent mixing tank, it is transported to the low-level reagent storage tank 1 through a pipeline connection. This reduces the chance of the reagent being exposed to the environment after preparation, lowers the risk of reagent contamination, improves the working environment, and reduces the impact of reagent volatilization on operators. In addition, the reagent mixing tank also acts as a buffer. The reagent mixing tank is usually prepared one tank at a time, while subsequent equipment requires a continuous and stable supply of reagents. The low-level reagent storage tank 1 intermittently receives reagents from the reagent mixing tank. The preparation rhythm of the reagent mixing tank does not need to be strictly synchronized with the subsequent dosing requirements, which improves the flexibility and fault tolerance of the equipment.

[0080] In this embodiment, a stirring rod is also installed in the low-level drug storage tank 1 to slowly stir the drug, preventing the prepared drug from settling in the low-level drug storage tank 1 and further ensuring the uniformity of the drug concentration.

[0081] Preferably, the effective volume of the low-level drug storage box 1 is not less than 1.5 times the amount of drug to be mixed and prepared in a single batch.

[0082] Since the mixing operation of the reagent mixing tank is intermittent, while the dosing demand of subsequent devices is continuous, the effective volume of the low-level reagent storage tank 1 is not less than 1.5 times the amount of reagent mixed and prepared in a single operation. This provides a safe and sufficient reagent storage capacity for the low-level reagent storage tank 1. This means that when the low-level reagent storage tank is operating normally, even if the reagent mixing tank suspends its supply due to a malfunction, the reagent storage in the low-level reagent storage tank 1 is sufficient to support subsequent dosing operations for a considerable period of time, providing valuable time for troubleshooting and avoiding the shutdown of the entire equipment.

[0083] A constant-pressure pneumatic automated dosing method for a flotation machine 9, employing a constant-pressure pneumatic automated dosing device for the flotation machine 9, is characterized by comprising the following steps:

[0084] S1. After the reagent is prepared in the reagent mixing tank, it is transported to the low-level reagent storage tank 1 for secondary storage.

[0085] S2. Start the low-flow agent pump 4 to continuously pump the prepared agent stored in the low-level agent storage box 1 into the agent filter box 2 through the first pipeline 3 for filtration.

[0086] S3. The filtered medicine flows into the high-level constant pressure dosing tank 5, and the excess medicine returns to the low-level medicine storage tank 1 through the overflow port 6 and the return pipe 7 to maintain the stability of the liquid level in the high-level constant pressure dosing tank 5.

[0087] S4. The automated control system controls the opening and closing of the pneumatic dosing valve 8 according to preset parameters so that the agent flows into the second pipeline 10.

[0088] S5. The agent flow meter 11 monitors the flow rate in the second pipeline 10 in real time and feeds the signal back to the automatic control system. The automatic control system dynamically controls the opening and closing frequency and single opening duration of the pneumatic dosing valve 8 according to the actual flow rate and the preset flow rate, so as to accurately control the agent flow rate.

[0089] S6. The reagent flows into the flotation machine 9 through the inlet of the second pipe 10.

[0090] The constant pressure pneumatic automated dosing method of flotation machine 9 using constant pressure pneumatic automated dosing device is optimized: First, in step S1, the reagent is prepared through reagent mixing tank and transported to low-level reagent storage tank 1 through pipeline, which reduces the chance of reagent being exposed to the environment after preparation and reduces the risk of reagent contamination.

[0091] In step S2, the continuous filtration is delivered to the inlet chamber of the drug filter box 2 by the low-flow drug pump 4 on the first pipeline 3. The low-flow drug pump 4 replenishes the drug to the high-pressure constant pressure drug tank 5 at a continuous and stable low flow rate to maintain the stability of the constant pressure source. The drug passes through the filter screen installed on the vertical grid plate 12 in the drug filter box 2 to filter impurities and undissolved small particles in the drug, preventing clogging.

[0092] Step S3 is crucial for maintaining a constant liquid level and hydraulic pressure. This is achieved by cooperating the overflow port 6 of the high-level constant pressure dosing tank 5 with the return pipe 7, as well as the partition baffle 15 inside the high-level constant pressure dosing tank 5, to stabilize the liquid flow and reduce disturbances.

[0093] The closed-loop control circuit formed by steps S4 and S5 enables the automated control system to not only issue commands but also provide real-time signal feedback through the drug flow meter 11 for dynamic adjustment, thereby achieving precise regulation of the drug flow rate.

[0094] In this embodiment, the flotation machine 9 dosing method can accurately feed mineral processing reagents to each dosing point, and the dosing time is the same. This avoids the reagent feed amount being affected by factors such as concentration, slag, and flow rate. The reagent filter box 2 continuously filters the reagents, the high-level constant pressure dosing box 5 directly feeds the reagents, and the pneumatic dosing valve 8 opens and closes forcefully, avoiding mechanical failures and reagent fluctuations caused by other dosing methods.

[0095] Therefore, this method of adding reagents to the flotation machine 9 can improve the accuracy and efficiency of reagent addition to the flotation machine 9, ensuring that the amount of reagent added to the flotation machine 9 can be added efficiently, accurately and reliably as required.

[0096] In one embodiment, in step S2, the slag discharge valve 14 at the bottom of the reagent filter box 2 is opened periodically to remove deposited impurities and quickly discharge them to prevent them from accumulating at the bottom of the box for a long time.

[0097] As is known from common technical knowledge, this invention can be implemented through other embodiments that do not depart from its spirit or essential characteristics. Therefore, the disclosed embodiments described above are merely illustrative in all respects and are not the only ones. All modifications within the scope of this invention or its equivalents are included in this invention.

Claims

1. A constant-pressure pneumatic automated dosing device for a flotation machine, characterized in that, include: Low-level medicine storage box, used to store prepared medicines; The inlet of the pharmaceutical filter box is connected to the outlet of the low-level pharmaceutical storage box through a first pipe, and is used to filter impurities and undissolved small particles of pharmaceutical in the pharmaceutical. A low-flow-rate agent pump, installed on the first pipeline, is used to continuously pump the agent from the low-level agent storage tank into the agent filter tank; The high-level constant-pressure drug delivery box has its inlet connected to the outlet of the drug filter box, and its upper part is provided with an overflow port. The overflow port is connected to the low-level drug storage box through a return pipe to maintain a constant liquid level in the box and form a constant-pressure drug source. At least one pneumatic dosing valve, the inlet of which is connected to the outlet at the bottom of the high-level constant pressure dosing tank via a pipeline; The flotation machine, wherein the outlet of the pneumatic dosing valve is connected to the inlet of the flotation machine via a second pipe; A chemical flow meter is installed on the second pipeline to detect and provide feedback on the actual chemical dosing flow rate in real time.

2. The dosing device according to claim 1, characterized in that, It also includes an automated control system, which includes a programmable controller and a terminal device that is communicatively connected to the programmable controller; The programmable controller is connected to the drug flow meter and the pneumatic dosing valve. The programmable controller is used to control the opening and closing frequency or the duration of each opening of the pneumatic dosing valve according to the preset dosage and the real-time signal received from the drug flow meter, so as to achieve accurate drug administration.

3. The dosing device according to claim 1, characterized in that, The pharmaceutical filtration box has a vertical grid inside its body, and a filter screen is installed on the vertical grid. The top of the pharmaceutical filter box is equipped with a sealing cover, and the bottom plate of the pharmaceutical filter box is preset at an inclined angle, with a slag discharge valve installed at the lowest point. The interior of the drug filter box is divided into a parallel drug inlet chamber and a drug outlet chamber, which are respectively connected to a drug inlet and a drug outlet.

4. The dosing device according to claim 1, characterized in that, The high-pressure constant-pressure drug delivery box is a rectangular box with a partition baffle welded inside along its length. The height of the partition baffle is lower than the height of the box, connecting the upper part of the box to stabilize the liquid flow and reduce disturbance.

5. The dosing device according to claim 1, characterized in that, It also includes a time relay for controlling the opening and closing of the pneumatic dosing valve. Specifically, the programmable controller controls the opening and closing of the pneumatic dosing valve by controlling the time relay.

6. The dosing device according to claim 1, characterized in that, The low-level drug storage box, drug filtration box, and high-level constant-pressure drug delivery box are all lined with an anti-corrosion layer.

7. The dosing device according to claim 1, characterized in that, It also includes a reagent mixing tank for preparing the reagent, which is connected to the low-level reagent storage tank via a pipe.

8. The dosing device according to claim 7, characterized in that, The effective volume of the low-level drug storage tank shall not be less than 1.5 times the amount of drug to be mixed and prepared in a single batch.

9. A constant-pressure pneumatic automated dosing method for a flotation machine, employing the dosing device as described in any one of claims 1 to 8, characterized in that, Includes the following steps: S1. After the reagent is prepared in the reagent mixing tank, it is transported to the low-level reagent storage tank for storage. S2. Start the low-flow agent pump to continuously pump the prepared agent stored in the low-level agent storage tank into the agent filter box through the first pipeline for filtration. S3. The filtered medicine flows into the high-level constant pressure dosing tank, and the excess medicine returns to the low-level medicine storage tank through the overflow port and return pipe to maintain the stability of the liquid level in the high-level constant pressure dosing tank. S4. The automated control system controls the opening and closing of the pneumatic dosing valve according to preset parameters so that the agent flows into the second pipeline; S5. The agent flow meter monitors the flow rate in the second pipeline in real time and feeds the signal back to the automatic control system. The automatic control system dynamically controls the opening and closing frequency and single opening duration of the pneumatic dosing valve according to the actual flow rate and the preset flow rate, so as to accurately control the agent flow rate. S6. The reagent flows into the flotation machine through the second pipe and the inlet of the flotation machine.

10. The constant pressure pneumatic automated dosing method for flotation machines according to claim 9, characterized in that, In step S2, the slag discharge valve at the bottom of the reagent filter box is opened periodically to remove deposited impurities.

Images