A flow control device and method for tailings discharge and sedimentation test

Abstract

This invention discloses a flow control device and method for tailings discharge and sedimentation experiments, specifically relating to the field of tailings dam discharge and sedimentation technology. The flow rate of the mud pump is adjusted by regulating the frequency converter motor to ensure that the slurry flow rate in the slurry pipeline meets the discharge flow requirements. During the process, the flow rate in the slurry pipeline is fine-tuned by adjusting the opening of the diversion valve, and the internal pressure of the pipeline is also adjusted. An electromagnetic flowmeter monitors the flow process in the slurry pipeline. The tailings slurry flows into the energy dissipation tank through the bend at the end of the slurry pipeline, ensuring a uniform flow distribution across the entire cross-section. After energy dissipation, the tailings slurry flows naturally out through the outlet of the secondary energy dissipation trough and into the discharge sedimentation tank. The energy dissipation tank includes a primary energy dissipation trough and a secondary energy dissipation trough, and the outlets of the primary and secondary energy dissipation troughs are kept horizontal to ensure a uniform flow distribution across the entire cross-section.

Description

Technical Field

[0001] This invention belongs to the field of tailings dam discharge and sedimentation technology, specifically relating to a flow control device and method for tailings discharge and sedimentation experiments. Background Technology

[0002] Current tailings dam specifications stipulate that when the tailings slurry weight concentration exceeds 35% and the upstream direct alluvial method is used for dam construction, a tailings dam stacking test study should be conducted; for wet tailings dams where the tailings particles are extremely fine and tailings are used for dam construction, a tailings dam stacking test study should also be conducted. By conducting tailings dam stacking tests, it is necessary to clarify the particle sorting patterns during the slurry deposition process, the morphological characteristics of the tailings slurry accumulation after flow and deposition, and to determine the slope of the tailings dam surface.

[0003] Inside the ore processing plant, the ore is ground into powder with a particle size of approximately 2mm to 0.005mm. The remaining tailings after washing are hydraulically transported via pipelines to a tailings dam. Inside the tailings dam, after being transported via pipelines, ore discharge pipes are arranged side-by-side along the dam crest, spaced 10m to 15m apart. If the tailings dam axis is long, a zoned, rotating ore discharge system is adopted, with each zone approximately 200m wide. This rotating ore discharge maintains a balanced rise in the tailings dam surface.

[0004] After the tailings flow out of the discharge pipe, the tailings slurry flows into the tailings pond along the tailings beach. The tailings slurry is a suspension of tailings particles in water. As the slurry flows, the tailings particles are continuously deposited on the tailings pond beach. Coarse particles are deposited first, followed by fine particles, forming a tailings accumulation with particle sorting characteristics on the beach. The size of this tailings accumulation is determined by the flow distance and driving force. Summary of the Invention

[0005] The purpose of this invention is to provide a flow control device and method for tailings discharge and sedimentation experiments to solve the above-mentioned problems.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a flow control method in a tailings discharge and sedimentation test, specifically comprising the following steps: S1. After the tailings slurry concentration meets the requirements and is stirred evenly in the slurry mixer, a mud pump driven by a variable frequency motor is used to supply tailings slurry to the ore discharge sedimentation test system. S2. Adjust the flow rate of the mud pump by adjusting the frequency converter motor so that the flow rate of the slurry in the slurry pipeline meets the requirements of the ore discharge flow rate. S3. During the process, the flow rate of the slurry in the slurry pipeline is finely adjusted by adjusting the opening of the diversion valve, and the pressure inside the pipeline is adjusted. During this period, the flow rate in the slurry pipeline is monitored by an electromagnetic flowmeter. S4. The tailings slurry flows into the energy dissipation tank through the bend at the end of the slurry pipeline, so that the flow of the tailings slurry is evenly distributed across the entire cross-section. After being dissipated, the tailings slurry flows out naturally along the outlet of the secondary energy dissipation tank and enters the ore discharge sedimentation tank.

[0007] Preferably, the energy dissipation tank includes a primary energy dissipation tank and a secondary energy dissipation tank, and the outlets of the primary and secondary energy dissipation tanks are kept horizontal to ensure uniform flow distribution of tailings slurry across the entire cross-section.

[0008] A flow control device for tailings discharge and sedimentation test includes a slurry agitator, a mud pump at the output port of the slurry agitator, a variable frequency motor connected to the mud pump for controlling the mud pump, and the output end of the mud pump extending to the top of the primary energy dissipation tank through a slurry pipeline.

[0009] Preferably, a flow meter is installed on the pipe at the output end of the mud pump, and a diversion valve is connected to a section of slurry pipe between the flow meter and the output end of the mud pump via a tee joint.

[0010] Preferably, a conical seat is provided in the middle of the primary energy dissipation tank, and the conical seat is vertically positioned below the pipe at the output end of the mud pump. Four partition plates are provided on the conical seat to vertically divide the primary energy dissipation tank into four equal parts and to evenly separate the mud output by the mud pump into the four sections. Each section has a guide channel at the bottom, which is used to collect the mud into the central guide pipe. One end of the guide pipe extends to the primary outlet hole on the side of the primary energy dissipation tank located in the secondary energy dissipation tank, and guides the mud into the interior of the secondary energy dissipation tank. The four primary outlet holes are evenly distributed.

[0011] Preferably, the path lengths of the two guide pipes farther from the secondary energy dissipation pool are denoted as A, and the path lengths of the two guide pipes closer to the secondary energy dissipation pool are denoted as B. The length of A is equal to the length of B, which is used to convert the concentrated output of the pipeline into a uniform and equidistant output to achieve the final uniform distribution.

[0012] The technical effects and advantages of this invention are: to achieve uniform flow of tailings slurry along the entire cross-section of the sedimentation tank during tailings discharge sedimentation test, and to eliminate the interference of the horizontal initial velocity, thereby achieving precise control of the discharge flow rate; Furthermore, during the energy dissipation ore discharge process, it transforms from tubular ore discharge to uniform linear ore discharge, making it more suitable for the large area of ​​the entire ore discharge sedimentation tank. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of a conventional ore-laying process. Figure 2 This is a schematic diagram of the overall structure of the present invention; Figure 3 This is a detailed structural diagram of the energy dissipation pool of the present invention; Figure 4 This is a schematic diagram of the guide tube installation structure of the present invention; Figure 5 This is a schematic diagram of the flow guide tube structure of the present invention.

[0014] In the diagram: 1. Slurry mixer; 2. Mud pump; 3. Flow meter; 4. Diverter valve; 5. Energy dissipation tank; 501. Primary energy dissipation tank; 502. Secondary energy dissipation tank; 503. Equalization plate; 504. Conical seat; 505. Guide channel; 506. Guide pipe; 507. Primary outlet hole; 508. Secondary outlet; 6. Slurry pipeline; 7. Variable frequency motor; 8. Ore discharge sedimentation tank. Detailed Implementation

[0015] 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.

[0016] This invention provides, for example Figures 1-5 The flow control device and method for a tailings discharge and sedimentation test shown herein specifically include the following steps: S1. After the tailings slurry concentration meets the requirements and is stirred evenly in the slurry mixer 1, the mud pump 2 driven by the variable frequency motor 7 supplies tailings slurry to the ore discharge sedimentation test system. S2. Adjust the flow rate of the mud pump 2 by adjusting the frequency converter motor 7 so that the flow rate of the slurry in the slurry pipeline 6 meets the requirements of the discharge flow rate. S3. During the process, the flow rate of the slurry in the slurry pipeline 6 is finely adjusted by adjusting the opening of the diversion valve 4, and the pressure inside the pipeline is adjusted. During this period, the flow rate in the slurry pipeline 6 is monitored by the electromagnetic flowmeter 3. S4. The tailings slurry flows into the energy dissipation tank 5 through the bend at the end of the slurry pipe 6, so that the flow of the tailings slurry is evenly distributed across the entire cross section. After being dissipated, the tailings slurry flows out naturally along the outlet of the two-stage energy dissipation tank and enters the ore discharge sedimentation tank.

[0017] Specifically, the energy dissipation tank includes a primary energy dissipation tank 501 and a secondary energy dissipation tank 502. The outlets of the primary energy dissipation tank 501 and the secondary energy dissipation tank 502 are kept horizontal to ensure that the tailings slurry has a uniform flow distribution across the entire cross-section.

[0018] Specifically, the device includes a slurry mixer 1, a mud pump 2 is installed at the output port of the slurry mixer 1, a variable frequency motor 7 is connected to the mud pump 2 for controlling the mud pump 2, and the output end of the mud pump 2 extends to the top of the primary energy dissipation tank 501 through the slurry pipe 6.

[0019] Specifically, a flow meter is installed on the slurry pipeline 6, and a diversion valve 4 is connected to a section of the slurry pipeline 6 between the flow meter 3 and the output end of the mud pump 2 via a tee joint.

[0020] Specifically, a conical seat 504 is provided in the middle of the tank of the primary energy dissipation pool 501, and the conical seat 504 is vertically installed below the pipe at the output end of the mud pump. Four partition plates 503 are provided on the conical seat 504 to vertically divide the primary energy dissipation pool 501 into four equal parts and to evenly separate the mud output by the mud pump into the four sections. Each section has a guide channel 505 at the bottom, which is used to collect the mud into the central guide pipe 506. One end of the guide pipe 506 extends to the primary outlet hole 507 on the side of the primary energy dissipation pool 501 located in the secondary energy dissipation pool 502, and guides the mud into the interior of the secondary energy dissipation pool 502. The four primary outlet holes 507 are evenly distributed.

[0021] Specifically, the path lengths of the two guide pipes 506 far from the secondary energy dissipation tank 502 are denoted as A, and the path lengths of the two guide pipes 506 close to the secondary energy dissipation tank 502 are denoted as B. The length of A is equal to the length of B, which is used to convert the concentrated output of the pipeline into a uniform and equidistant output to achieve the final uniform distribution.

[0022] Working principle: After the tailings slurry concentration meets the requirements and is stirred evenly in the slurry mixer 1, a mud pump 2 driven by a variable frequency motor supplies tailings slurry to the ore discharge sedimentation test system. During the test, the flow rate of the mud pump 2 is adjusted by adjusting the variable frequency motor 7 to ensure that the slurry flow rate in the slurry pipeline 6 meets the ore discharge flow rate requirements. During the test, the slurry flow rate in the slurry pipeline 6 is finely adjusted by adjusting the opening of the diversion valve 4, and the internal pressure of the pipeline is also adjusted. The electromagnetic flowmeter 3 monitors the flow process in the slurry pipeline 6 and records it in real time. After the above adjustments, the tailings slurry that meets the flow rate requirements flows into the energy dissipation tank through the bend at the end of the slurry pipeline 6. At this time, the tailings slurry flow velocity is vertically downward. The structure of the energy dissipation tank is as follows: Figure 4 As shown, the tailings slurry flows into the energy dissipation tank through the bend at the end of the slurry pipe 6. After passing through two stages of energy dissipation channels within the tank, the tailings slurry flows into the ore discharge sedimentation tank 8. The length of the energy dissipation tank is the same as the net width of the ore discharge sedimentation tank 8, which is 2000 mm. The first-stage energy dissipation channel is 500 mm high, 300 mm wide, and 150 mm deep; the second-stage energy dissipation channel is 300 mm high, 300 mm wide, and 150 mm deep. The outlets of both stages of energy dissipation channels are kept horizontal to ensure uniform flow distribution of the tailings slurry across the entire cross-section. After energy dissipation, the tailings slurry flows naturally out of the outlet of the second-stage energy dissipation channel and into the ore discharge sedimentation tank. Example 2: Each of the intervals is equipped with a guide channel 505 at the bottom. The guide channel 505 is used to collect the mud into the central guide pipe 506. One end of the guide pipe 506 extends to the primary outlet hole 507 on the side of the primary energy dissipation tank 501 located in the secondary energy dissipation tank 502, and guides the mud into the interior of the secondary energy dissipation tank 502. The four primary outlet holes 507 are equidistantly distributed. The path lengths of the two guide pipes 506 far from the secondary energy dissipation tank 502 are denoted as A, and the path lengths of the two guide pipes 506 close to the secondary energy dissipation tank 502 are denoted as B. The length of A is equal to the length of B, which is used to convert the concentrated output of the pipeline into a uniform and equidistant output to achieve the final uniform distribution.

[0023] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A flow control method in a tailings discharge and sedimentation test, characterized in that: Specifically, the following steps are included: S1. After the tailings slurry concentration meets the requirements and is stirred evenly in the slurry mixer, a mud pump driven by a variable frequency motor is used to supply tailings slurry to the ore discharge sedimentation test system. S2. Adjust the flow rate of the mud pump by adjusting the frequency converter motor so that the flow rate of the slurry in the slurry pipeline meets the requirements of the ore discharge flow rate. S3. During the process, the flow rate of the slurry in the slurry pipeline is finely adjusted by adjusting the opening of the diversion valve, and the pressure inside the pipeline is adjusted. During this period, the flow rate in the slurry pipeline is monitored by an electromagnetic flowmeter. S4. The tailings slurry flows into the energy dissipation tank through the bend at the end of the slurry pipeline, so that the flow of the tailings slurry is evenly distributed across the entire cross-section. After being dissipated, the tailings slurry flows out naturally along the outlet of the secondary energy dissipation tank and enters the ore discharge sedimentation tank.

2. The flow control method in a tailings discharge and sedimentation test according to claim 1, characterized in that: The energy dissipation tank includes a primary energy dissipation tank and a secondary energy dissipation tank. The outlets of the primary and secondary energy dissipation tanks are kept horizontal to ensure that the tailings slurry has a uniform flow distribution across the entire cross-section.

3. A flow control device for a tailings discharge and sedimentation test, operating the method described in claim 2, characterized in that: The device includes a slurry mixer, the output port of which is equipped with a mud pump. A variable frequency motor is driven to the mud pump for controlling the mud pump. The output end of the mud pump extends to the top of the primary energy dissipation tank through a slurry pipeline.

4. The flow control device for tailings discharge and sedimentation test according to claim 3, characterized in that: A flow meter is installed on the pipe at the output end of the mud pump, and a diversion valve is connected to a section of slurry pipe between the flow meter and the output end of the mud pump via a tee joint.

5. The flow control device for tailings discharge and sedimentation test according to claim 4, characterized in that: A conical seat is installed in the center of the primary energy dissipation tank and is vertically positioned below the pipe at the output end of the mud pump. Four partition plates are installed on the conical seat to vertically divide the primary energy dissipation tank into four equal parts and to evenly separate the mud output from the mud pump into the four sections. Each section has a guide channel at the bottom to collect the mud into the central guide pipe. One end of the guide pipe extends to the primary outlet hole on the side of the primary energy dissipation tank that is located in the secondary energy dissipation tank, and guides the mud into the interior of the secondary energy dissipation tank. The four primary outlet holes are evenly distributed.

6. The flow control device for tailings discharge and sedimentation test according to claim 5, characterized in that: The path lengths of the two guide pipes farther from the secondary energy dissipation pool are denoted as A, and the path lengths of the two guide pipes closer to the secondary energy dissipation pool are denoted as B. The length of A is equal to the length of B, which is used to convert the concentrated output of the pipeline into a uniform and equidistant output to achieve the final uniform distribution.

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