A heap leaching system seepage regulation system and method based on variable speed cycle spraying

Abstract

The present application provides a kind of based on variable speed cycle spray heap leaching system percolation control system and method, belong to metal ore solution leaching development technical field.The system is laid out on the upper part of heap spray system, bottom is laid heap bottom liquid collecting ditch;Water content sensor is embedded in heap, monitors different water content at different height;Ion concentration sensor is immersed in heap bottom liquid collecting ditch below leaching solution liquid level, monitors leaching solution ion concentration;Through electric signal transmission pipeline, data set control platform is connected with leaching solution flowmeter, ion concentration sensor, water content sensor and receives electric signal, realizes variable speed system, peristaltic pump, pumping controller real-time feedback and adjustment;Variable speed system is connected with leaching solution flowmeter and controls its liquid flow;Pumping controller is connected with peristaltic pump, spray system and controls its start-stop and spray intensity.The present application can improve heap leaching system water content and mineral leaching efficiency.

Description

Technical Field

[0001] This invention relates to the field of metal ore leaching technology, and in particular to a seepage control system and method for heap leaching systems based on variable speed circulating spraying. Background Technology

[0002] Heap leaching technology can achieve efficient recovery of strategic metal minerals such as low-grade copper sulfide ore and sandstone uranium ore. Among them, the leaching solution, as an important medium for the coexistence of solid, liquid, gas, bacteria and heat multiphase media, provides an important foundation for mineral leaching reactions and metal ion solute transfer, and is regarded as the "blood" of the heap leaching system, directly affecting the leaching efficiency of the heap leaching system.

[0003] As mentioned earlier, ore heap leaching is a complex reaction system based on an unsaturated porous medium. The leaching solution undergoes rapid seepage through macropores and slow capillary diffusion within its pore structure. There are both flow zones and stagnation zones within the ore heap. The water content of the ore heap system is an important indicator of the content and saturation of the leaching solution within the heap, and it is also a crucial factor that directly affects the mineral leaching efficiency.

[0004] However, based on relevant research both domestically and internationally, the following three technical bottlenecks and challenges exist: 1) The use of a single spray intensity or a few spray intensities leads to easy interconnection within the ore pile, resulting in dominant flow of the leaching solution. A large amount of the leaching solution escapes the entire ore pile without undergoing leaching reaction, resulting in low leaching solution utilization. In severe cases, a "dead pile" is formed, preventing the effective leaching and extraction of valuable minerals; 2) The spraying process lacks control and intervention. Once the spray intensity is set, it is usually not changed or rarely changed. This causes mineral leaching and the reaction with the leaching solution to concentrate in the early stages of leaching, while the later capillary diffusion process... The leaching process suffers from low diffuse permeability, leaving a large unsaturated zone of leaching solution within the ore heap, severely restricting the continuous and rapid leaching of minerals. Furthermore, intermittent spraying is often used for regulation, meaning that the solution seepage and mineral leaching process are intervened by controlling the start and end of the spraying. Existing research confirms that this regulation method typically does not alter the dominant flow of the solution, and the steady-state moisture content and residual steady-state moisture content do not fluctuate significantly. This indicates that this type of spraying mode cannot fundamentally change the water content of the ore heap, increase or decrease the moisture content within the heap, and thus change the leaching rate and efficiency. Therefore, there is an urgent need to innovate a seepage regulation system and method for heap leaching systems based on variable-speed circulating spraying. Summary of the Invention

[0005] This invention provides a seepage control system and method for heap leaching systems based on variable speed circulating spraying, which can ultimately improve the water content and mineral leaching efficiency of the heap leaching system.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solution:

[0007] A seepage control system for a heap leaching system based on variable-speed circulating spraying includes a lean solution tank, a variable-speed system, a leaching solution flow meter, a peristaltic pump, a pumping controller, a spraying system, a data control platform, an ion concentration sensor, a rich solution tank, a bottom collection ditch, a ore heap, and a moisture content sensor.

[0008] A sprinkler system is installed on the upper part of the ore pile, and a bottom liquid collection ditch is installed at the bottom of the ore pile.

[0009] The moisture content sensor is embedded in the ore pile to monitor the moisture content at different pile heights;

[0010] The ion concentration sensor is immersed below the surface of the leachate in the collection ditch at the bottom of the pile to monitor the ion concentration of the leachate;

[0011] The spray system is connected to a peristaltic pump, which is controlled by a pumping controller;

[0012] A speed-changing system and a leaching solution flow meter are installed on the pipeline connecting the peristaltic pump and the lean solution tank.

[0013] The data control platform is connected to the leaching solution flow meter, ion concentration sensor, and moisture content sensor via an electrical signal transmission pipeline. It receives electrical signals and realizes real-time feedback and adjustment of the speed change system, peristaltic pump, and pumping controller. The data control platform realizes precise real-time control of the spray intensity (or flow rate) of the spraying system on the top of the ore pile through the speed change system, leaching solution flow meter, peristaltic pump, and pumping controller.

[0014] The bottom collection channel is connected to the rich solution tank via the leaching solution transport pipeline. The high-concentration solution with a metal ion concentration of not less than 60% in the rich solution tank is sent to the hydrometallurgical workshop, and the low-concentration solution with a metal ion concentration of less than 60% is sent to the lean solution tank.

[0015] The speed change system is connected to the leaching liquid flow meter and controls its liquid flow rate.

[0016] The pumping controller connects the peristaltic pump and the spraying system and controls the start and stop of the peristaltic pump and the spraying intensity of the spraying system.

[0017] The moisture content of the ore pile is monitored and displayed by a moisture content sensor and a data control platform. The moisture content sensor has a measurement accuracy of 0.01%.

[0018] When the spraying system is started and sprays continuously, the steady-state moisture content of the ore pile is obtained. After the spraying system is shut down, the residual steady-state moisture content of the ore pile is obtained.

[0019] The moisture content sensor is vertically embedded inside the ore pile, 2 meters away from the surface of each layer of the ore pile. No less than 4 moisture content sensors are embedded in each layer of the ore pile. The moisture content sensors in each layer are arranged in a rhombus shape. The measurable moisture content range is 0 to 100%, enabling real-time monitoring of the ore pile from being completely dry to a water-retaining state.

[0020] The height of a single-layer ore pile shall not exceed 5 meters.

[0021] The variable speed system achieves uniform calibration of spray intensity based on surface flow velocity. The surface flow velocity of the leaching solution in the ore pile ranges from 0.05 m / s to 1.00 m / s, with a speed gradient of ±0.05 m / s and a total of 20 speed levels. Combined with the changes in the internal moisture content of the ore pile monitored by the moisture content sensor, the data control platform is used to adjust the flow rate of the leaching solution flow meter to meet the spraying requirements of different heap leaching stages.

[0022] When the average moisture content fluctuation at each measuring point of the ore pile is less than ±0.5% after 15 minutes of continuous monitoring by the moisture content sensor, it is considered that the ore pile has reached a steady-state liquid holding or residual steady-state liquid holding state.

[0023] The electrical signal transmission pipeline and the leaching solution delivery pipeline are both made of wear-resistant and corrosion-resistant flexible hoses.

[0024] The application method of this system includes the following steps:

[0025] S1, Piling and Laying Line:

[0026] The heap leaching site was leveled, and lean solution pools, rich solution pools, and bottom collection ditches were excavated. Crushed ore with a block size of less than 0.2m was piled up to obtain a shaped ore pile with a single-layer height of less than 5 meters. A spray system was laid on the surface of the ore pile. The speed control system, leaching solution flow meter, peristaltic pump, pumping controller, ion concentration sensor, and moisture content sensor were connected to the data control platform using an electrical signal transmission pipeline. The continuity and normal transmission of the electrical signal transmission pipeline were verified.

[0027] S2, Start-up and test run:

[0028] The initial spraying intensity (typically 0.05 m / s) is set using the data control platform. The variable speed system, leaching solution flow meter, pump controller, and peristaltic pump are then started sequentially to allow the leaching solution in the lean solution tank to enter the ore pile through the leaching solution delivery pipeline and spraying system. The moisture content inside the ore pile is monitored and calibrated using a moisture content sensor, and the ion concentration in the collection ditch at the bottom of the pile is monitored and calibrated using an ion concentration sensor to achieve sufficient pre-wetting of the ore pile and eliminate system monitoring errors.

[0029] S3, Single-cycle steady-state / residual steady-state water content:

[0030] After starting the spray test run (surface flow rate 0.05 m / s), the ore pile is initially wetted, and the average moisture content in the ore pile is monitored using a moisture content sensor; after reaching a steady-state moisture content (moisture content fluctuation less than 0.5% for 15 consecutive minutes, usually a moisture content increase of less than 0.5%), the spraying is stopped, and the pile is gradually brought to a residual steady-state moisture content (moisture content fluctuation less than 0.5% for 15 consecutive minutes, usually a moisture content decrease of less than 0.5%).

[0031] S4, Multi-cycle increasing flow rate:

[0032] The variable speed system is adjusted using a data set control platform, the leaching solution flow meter controls the leaching solution flow rate, and the peristaltic pump is controlled by a pump controller to start and stop the solution pumping. When the moisture content sensor detects that the residual steady-state moisture content has been reached, the variable speed step is increased from 0.05 m / s to 0.10 m / s (and then increased by 0.05 m / s each time). Step S3 is repeated. Whenever the residual steady-state moisture content under this surface flow rate condition is reached, the variable speed step is increased by one step until the leaching solution flow rate is adjusted to the target flow rate. The maximum variable speed step is 20, and the peak surface flow rate is 1.00 m / s.

[0033] S5. High-efficiency leaching and autonomous flow rate control:

[0034] Once the target spray intensity (or surface flow rate) of the ore pile is reached, it remains stable to promote the rapid leaching of valuable metal minerals within the ore pile. The leaching effect is determined by monitoring the ion concentration sensor below the collection ditch at the bottom of the pile. The solution flow rate is adjusted autonomously by using a data control platform, a speed change system, a leaching solution flow meter, and a pump controller. This enables autonomous control of the ore pile's water content, reduces the occurrence of dominant flow of the solution within the ore pile, and improves the leaching efficiency.

[0035] S6, Multi-cycle flow rate reduction:

[0036] The ion concentration sensor feeds back real-time data to the data control platform. When the mineral leaching rate is shown to slow down significantly, the speed control system, the leaching solution flow meter and the pump controller are adjusted to reduce the intensity of the spray system to reduce costs and enhance capillary penetration.

[0037] Specifically, when the moisture content sensor detects that the residual steady-state moisture content has been reached, the speed reduction steps are reduced (by 0.05 m / s each time), and step S3 is repeated to continuously reduce the spray intensity and strengthen the capillary diffusion wetting of the unsaturated area of ​​the ore pile until the ion concentration sensor shows that the ion concentration in the bottom collection ditch is close to the minimum threshold.

[0038] S7. End of heap leaching:

[0039] Ion concentration sensors are used to monitor the ion concentration of the overflow liquid in the bottom collection ditch. When the minimum threshold is reached, the spraying operation is stopped. Using the existing single-layer ore pile as a base, the pile is rebuilt and pipelines are laid on top. Steps S1 to S6 are repeated until the final height of the ore pile and the target leaching rate are reached.

[0040] The above technical solution has at least the following advantages compared with the existing technology:

[0041] The above scheme, focusing on the core issue of efficient spraying and leaching operations in heap leaching, utilizes a data control platform to effectively monitor moisture content and ion concentration sensors, as well as to effectively control the variable speed system, leaching solution flow meter, peristaltic pump, and pumping controller. Control signals and leaching solution are transmitted via electrical signal transmission pipelines and leaching solution delivery pipelines, respectively. After the heap construction and commissioning phases, the system sequentially enters the single-cycle steady-state / residual steady-state moisture content stage, the multi-cycle flow rate increasing stage, the efficient leaching and flow rate autonomous regulation stage, the multi-cycle flow rate decreasing stage, and the heap leaching termination stage. This effectively achieves variable-speed cyclic spraying operations in the heap leaching system, enhancing seepage diffusion and mineral leaching efficiency. The system is simple in structure, practical and convenient in method, and highly feasible, enabling full-process control and enhanced leaching of the heap leaching solution seepage process. Attached Figure Description

[0042] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0043] Figure 1 This is a schematic diagram of the seepage control system structure of a heap leaching system based on variable speed circulating spraying according to the present invention;

[0044] Figure 2 This is a flowchart of the seepage control method for heap leaching system based on variable speed circulating spraying according to the present invention;

[0045] Figure 3 This is a schematic diagram illustrating the variation of surface flow velocity and ore pile moisture content with spraying time under variable speed circulating spraying conditions in an embodiment of the present invention.

[0046] Among them: 1-lean solution tank, 2-variable speed system, 3-leaching solution flow meter, 4-peristaltic pump, 5-pumping controller, 6-spraying system, 7-data set control platform, 8-electrical signal transmission pipeline, 9-ion concentration sensor, 10-leaching solution delivery pipeline, 11-rich solution tank, 12-hydrothermal workshop, 13-bottom collection ditch, 14-mineral pile, 15-moisture content sensor. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the described embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0048] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains.

[0049] This invention provides a seepage control system and method for heap leaching systems based on variable speed circulating spraying.

[0050] like Figure 1 As shown, the control system includes a lean solution tank 1, a variable speed system 2, a leaching solution flow meter 3, a peristaltic pump 4, a pumping controller 5, a spraying system 6, a data collection and control platform 7, an ion concentration sensor 9, a rich solution tank 11, a bottom slurry collection ditch 13, a ore pile 14, and a moisture content sensor 15.

[0051] A sprinkler system 6 is installed on the upper part of the ore pile 14, and a bottom liquid collection ditch 13 is installed at the bottom of the ore pile 14.

[0052] The moisture content sensor 15 is embedded in the ore pile 14 to monitor the moisture content at different pile heights;

[0053] The ion concentration sensor 9 is immersed below the surface of the leachate in the bottom collection ditch 13 to monitor the ion concentration of the leachate;

[0054] The spray system 6 is connected to the peristaltic pump 4, which is controlled by the pumping controller 5;

[0055] A speed-changing system 2 and a leaching solution flow meter 3 are installed on the pipeline connecting the peristaltic pump 4 and the lean solution tank 1.

[0056] The data control platform 7 is connected to the leaching liquid flow meter 3, ion concentration sensor 9, and moisture content sensor 15 via an electrical signal transmission pipeline 8. It receives electrical signals and realizes real-time feedback and adjustment of the speed change system 2, peristaltic pump 4, and pumping controller 5.

[0057] The bottom collection ditch 13 is connected to the rich solution tank 11 through the leaching solution conveying pipeline 10. The high concentration solution with a metal ion concentration of not less than 60% in the rich solution tank 11 is sent to the hydrometallurgical workshop 12, and the low concentration solution with a metal ion concentration of less than 60% is sent to the lean solution tank 1.

[0058] The moisture content of the ore pile is monitored and displayed by a moisture content sensor and a data control platform. The moisture content sensor has a measurement accuracy of 0.01%.

[0059] When the spraying system is started and sprays continuously, the steady-state moisture content of the ore pile is obtained. After the spraying system is shut down, the residual steady-state moisture content of the ore pile is obtained.

[0060] The moisture content sensor is vertically embedded inside the ore pile, 2 meters away from the surface of the ore pile. The moisture content can be measured in the range of 0 to 100%, enabling real-time monitoring of the ore pile from being completely dry to a water-retaining state.

[0061] The variable speed system achieves uniform calibration of spray intensity based on surface flow velocity. The surface flow velocity of the leaching solution in the ore pile ranges from 0.05 m / s to 1.00 m / s, with a speed gradient of ±0.05 m / s. A total of 20 speed levels are set. Combined with moisture content sensor monitoring, the operation data control platform meets the spraying requirements of different heap leaching stages.

[0062] When the average moisture content fluctuation at each measuring point of the ore pile is less than ±0.5% after 15 minutes of continuous monitoring by the moisture content sensor, it is considered that the ore pile has reached a steady-state liquid holding or residual steady-state liquid holding state.

[0063] The electrical signal transmission pipeline and the leaching solution delivery pipeline are both made of wear-resistant and corrosion-resistant flexible hoses.

[0064] The application method of the system of the present invention will be described in detail below with reference to specific embodiments.

[0065] like Figure 2 As shown, the process of using this system for variable speed circulating spraying is as follows:

[0066] S1, Piling and Laying Line:

[0067] The heap leaching site was leveled, and supporting facilities such as lean solution pool 1, rich solution pool 11, and bottom collection ditch 13 were excavated. The crushed ore with a block size of less than 0.2m was piled up to obtain a shaped ore pile 14 with a single layer height of 4 meters. A spray system 6 was laid on the surface of the ore pile 14. The variable speed system 2, leaching solution flow meter 3, peristaltic pump 4, pumping controller 5, ion concentration sensor 9, and moisture content sensor 15 were connected to the data control platform 7 using an electrical signal transmission pipeline 8. The continuity and normal transmission of the electrical signal transmission pipeline 8 were verified. The vertical distance between adjacent layers of moisture content sensors is 4 meters, and the moisture content sensors in each layer are arranged in a diamond pattern.

[0068] S2, Start-up and test run:

[0069] Using the data set control platform 7, the initial spraying intensity is set to 0.05 m / s. The variable speed system 2, the leaching solution flow meter 3, the pump controller 5, and the peristaltic pump 4 are started sequentially, so that the leaching solution in the lean solution tank 1 enters the ore pile 14 through the leaching solution delivery pipeline 10 and the spraying system 6. The moisture content sensor 15 is used to monitor and calibrate the moisture content inside the ore pile, and the ion concentration sensor 9 is used to monitor and calibrate the ion concentration in the collection ditch at the bottom of the pile, so as to achieve sufficient pre-wetting of the ore pile and eliminate system monitoring errors. In this embodiment, the heap leaching is mainly carried out on secondary sulfide copper ore, and the moisture content is monitored and controlled at 5% to 60%.

[0070] S3, Single-cycle steady-state / residual steady-state water content:

[0071] After the spray test run is started, the surface velocity of the ore pile is 0.05 m / s, and the ore pile is initially wetted. The average moisture content in the ore pile 14 is monitored using the moisture content sensor 15. After reaching the steady-state moisture content (i.e., the moisture content fluctuation is less than 0.5% for 15 consecutive minutes, usually the moisture content increase is less than 0.5%), the spraying is stopped, and the residual steady-state moisture content is gradually reached (i.e., the moisture content fluctuation is less than 0.5% for 15 consecutive minutes, usually the moisture content decrease is less than 0.5%).

[0072] S4, Multi-cycle increasing flow rate:

[0073] The variable speed system 2 and the leaching solution flow meter 3 are used to adjust the flow rate of the leaching solution by using the data set control platform 7. The peristaltic pump is controlled by the pump controller 5 to start and stop the solution pumping. When the moisture content sensor 15 detects that the residual steady-state moisture content has been reached, the variable speed level is increased from 0.05 m / s to 0.10 m / s, and the speed is increased by 0.05 m / s each time. Step S3 is repeated. Whenever the residual steady-state moisture content is reached under the surface flow rate condition, the variable speed level is increased by one level until the flow rate of the leaching solution is adjusted to the target flow rate. The maximum variable speed is 20 levels and the peak surface flow rate is 1.00 m / s.

[0074] S5. High-efficiency leaching and autonomous flow rate control:

[0075] After reaching the target spray intensity of the ore pile 14, it remains stable to promote the rapid leaching of valuable metal minerals in the ore pile 14; the mineral leaching effect is determined by monitoring the ion concentration sensor 9 below the liquid collection ditch 13 at the bottom of the pile; the solution flow rate is adjusted autonomously by using the data control platform 7, the speed change system 2, the leaching solution flow meter 3 and the pump controller 5 to achieve autonomous control of the water content of the ore pile, reduce the occurrence of dominant flow of solution inside the ore pile and improve the mineral leaching efficiency;

[0076] S6, Multi-cycle flow rate reduction:

[0077] Ion concentration sensor 9 feeds back real-time data to data control platform 7. When the mineral leaching rate slows down significantly (the mineral leaching rate growth rate is less than 5% / day), the speed control system 2, leaching solution flow meter 3, and pump controller 5 are adjusted to reduce the spraying intensity of spraying system 6. Specifically, when the moisture content sensor 15 detects that the residual steady-state moisture content has been reached, the speed control steps are reduced (each time by 0.05 m / s), for example, from 0.60 m / s to 0.55 m / s. Step S3 is repeated to continuously reduce the spraying intensity and enhance capillary diffusion wetting in the unsaturated zone of the ore pile 14 until the ion concentration sensor 9 shows that the ion concentration in the bottom collection ditch is close to the minimum threshold (the specific minimum threshold is determined according to the different minerals being leached).

[0078] S7. End of heap leaching:

[0079] Using ion concentration sensor 9 to monitor the ion concentration of the overflow liquid in the bottom collection ditch 13, the spraying operation is stopped when the minimum threshold is reached. Using the existing single-layer ore pile as the base, the pile is rebuilt and pipelines are laid on top. Steps S1 to S6 are repeated until the final height of the ore pile and the target leaching rate are reached.

[0080] During the above process, the variation patterns of the surface velocity and moisture content of the ore pile with the spraying duration are as follows: Figure 3 As shown.

[0081] The following points need to be explained:

[0082] (1) The accompanying drawings of the embodiments of the present invention only involve the structures involved in the embodiments of the present invention. Other structures can refer to the general design.

[0083] (2) Where there is no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other to obtain new embodiments.

[0084] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. The scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A seepage regulation system for a heap leaching system based on variable speed cyclic spraying, characterized in that, The heap leaching system comprises a poor liquid pool, a variable speed system, a leaching liquid flow meter, a peristaltic pump, a pumping controller, a spraying system, a data set control platform, an ion concentration sensor, a rich liquid pool, a heap bottom collection ditch, a ore heap and a moisture content sensor, The spraying system is arranged on the upper part of the ore heap, and the heap bottom collection ditch is arranged at the bottom of the ore heap. The moisture content sensor is embedded in the ore heap to monitor the moisture content at different heights of the ore heap. The ion concentration sensor is immersed below the liquid level of the leaching liquid in the heap bottom collection ditch to monitor the ion concentration of the leaching liquid. The spraying system is connected to the peristaltic pump, and the peristaltic pump is controlled by the pumping controller. The variable speed system and the leaching liquid flow meter are arranged on the pipeline connected to the peristaltic pump. The data set control platform is connected to the leaching liquid flow meter, the ion concentration sensor and the moisture content sensor through an electric signal transmission pipeline to receive electric signals and realize real-time feedback and adjustment of the variable speed system, the peristaltic pump and the pumping controller. The heap bottom collection ditch is connected to the rich liquid pool through a leaching liquid delivery pipeline, and high-concentration solutions with a metal ion concentration of not less than 60% in the rich liquid pool are sent to a hydrometallurgical workshop, and low-concentration solutions with a metal ion concentration of less than 60% are sent to the poor liquid pool.

2. The seepage regulating system for heap leaching system based on variable speed cyclic spraying according to claim 1, characterized in that, The variable speed system is connected to the leaching liquid flow meter and controls the liquid flow thereof.

3. The seepage regulating system for heap leaching system based on variable speed cycle spraying according to claim 1, characterized in that, The pumping controller is connected to the peristaltic pump and the spraying system and controls the start and stop of the peristaltic pump and the spraying intensity of the spraying system.

4. The seepage regulating system for heap leaching system based on variable speed cyclic spraying according to claim 1, characterized in that, The moisture content of the ore heap is monitored and displayed by the moisture content sensor and the data set control platform, and the measurement accuracy of the moisture content sensor is 0.01%. When the spraying system is started and continuously sprayed, the steady-state moisture content of the ore heap is obtained, and after the spraying system is stopped, the residual steady-state moisture content of the ore heap is obtained.

5. The seepage regulating system for heap leaching system based on variable speed cyclic spraying according to claim 1, characterized in that, The moisture content sensor is vertically embedded in the ore heap, and the distance from each layer of the ore heap surface is 2 meters. Not less than 4 moisture content sensors are embedded in each layer of the ore heap, and the moisture content sensors in each layer are arranged in a diamond shape. The measurable range of the moisture content is 0-100%, and the real-time monitoring of the complete drying to the water retention state of the ore heap is realized.

6. The variable rate cyclic spray based heap leaching system percolation regulation system according to claim 1, wherein, The single-layer stacking height of the ore heap is not more than 5 meters.

7. The seepage regulating system for heap leaching system based on variable speed cyclic spraying according to claim 1, characterized in that, The variable speed system realizes uniform calibration of the spraying intensity by surface flow rate. The surface flow rate of the leaching liquid in the ore heap ranges from 0.05 m / s to 1.00 m / s, the variable speed gradient is ±0.05 m / s, a total of 20 variable speeds are set, and the internal moisture content of the ore heap is monitored by the moisture content sensor. The operation data set control platform adjusts the flow of the leaching liquid flow meter to meet the spraying requirements of different heap leaching stages.

8. The seepage regulating system for heap leaching system based on variable speed cyclic spraying according to claim 4, characterized in that, When the average moisture content fluctuation of each measuring point of the ore heap is less than ±0.5% in 15 minutes of continuous monitoring by the moisture content sensor, it is considered that the ore heap reaches the steady-state liquid holding or residual steady-state liquid holding state.

9. The seepage regulating system for heap leaching system based on variable speed cyclic spraying according to claim 1, characterized in that, The electric signal transmission pipeline and the leaching liquid delivery pipeline are made of wear-resistant and corrosion-resistant hoses.

10. The method of using a variable rate cyclic spray based heap leaching system seepage regulation system according to claim 1, wherein, The steps are as follows: S1, pile up and lay out lines: The heap leaching site is leveled, a poor liquid pool, a rich liquid pool, a heap bottom liquid collecting ditch are excavated, ores with a size less than 0.2 m after crushing are stacked to obtain a formed ore heap with a single layer height less than 5 m, and a spraying system is laid on the surface of the ore heap; the variable speed system, the leaching solution flowmeter, the peristaltic pump, the pumping controller, the ion concentration sensor and the moisture content sensor are connected with the data set control platform by using the electric signal transmission pipeline, and the electric signal transmission pipeline is checked to be connected and normally transmitted; S2, start the test run: The initial spraying intensity is set by using the data set control platform, the variable speed system, the leaching solution flowmeter, the pumping controller and the peristaltic pump are started in turn, the leaching solution in the poor liquid pool enters the inside of the ore heap through the leaching solution conveying pipeline and the spraying system, the moisture content in the inside of the ore heap is monitored and calibrated by using the moisture content sensor, and the ion concentration in the heap bottom liquid collecting ditch is monitored and calibrated by using the ion concentration sensor, so that the ore heap is fully pre-wetted and the system monitoring error is eliminated; S3, single cycle steady state / residual steady state moisture content: After the spraying test run is started, the ore heap is initially wetted, the average moisture content in the ore heap is monitored by using the moisture content sensor, after the steady state moisture content is reached, the spraying is stopped, and the residual steady state moisture content is gradually reached; S4, multi-cycle flow rate increment: The data set control platform is used to adjust the variable speed system and the leaching solution flowmeter to control the leaching solution flow rate, the pumping controller is used to control the peristaltic pump to realize the start and stop of the solution pumping, when the residual steady state moisture content is reached by monitoring with the moisture content sensor, the variable speed level is increased from 0.05 m / s to 0.10 m / s, and step S3 is repeated, whenever the residual steady state moisture content under the surface flow rate condition is reached, the variable speed level is increased, until the leaching solution flow rate is adjusted to the target flow rate, the maximum variable speed is 20 levels, and the peak surface flow rate is 1.00 m / s; S5, efficient leaching and flow rate self-regulation: After the target spraying intensity of the ore heap is reached, the rapid leaching of the valuable metal minerals in the ore heap is promoted, the mineral leaching effect is determined by monitoring the ion concentration sensor under the heap bottom liquid collecting ditch, the data set control platform is used to realize the self-regulation of the solution flow rate by adjusting the variable speed system, the leaching solution flowmeter and the pumping controller, the moisture content of the ore heap is self-regulated, the solution dominant flow in the inside of the ore heap is reduced, and the mineral leaching efficiency is improved; S6, multi-cycle flow rate decrement: The ion concentration sensor feeds back real-time data to the data set control platform, when the mineral leaching rate is significantly slowed down, the variable speed system, the leaching solution flowmeter and the pumping controller are adjusted to reduce the liquid distribution intensity of the spraying system; specifically, when the residual steady state moisture content is reached by monitoring with the moisture content sensor, the variable speed level is reduced, step S3 is repeated, the spraying intensity is continuously reduced, the capillary diffusion wicking of the unsaturated zone of the ore heap is strengthened, and until the ion concentration sensor shows that the ion concentration in the heap bottom liquid collecting ditch is close to the minimum threshold value; S7, end of heap leaching: The ion concentration sensor is used to monitor the ion concentration of the overflow liquid in the heap bottom liquid collecting ditch, when the minimum threshold value is reached, the spraying operation is stopped, the existing single layer ore heap is used as the base, the stacking and pipeline laying are restarted on the upper part, and steps S1-S6 are repeated until the final height and the target leaching rate of the ore heap are reached.

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