CN114934176A - System and method for reinforcing copper sulfide ore biological heap leaching by using intermittent liquid distribution - Google Patents
System and method for reinforcing copper sulfide ore biological heap leaching by using intermittent liquid distribution Download PDFInfo
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Abstract
The invention provides a system and a method for strengthening copper sulfide ore heap bioleaching by using intermittent liquid distribution, belonging to the technical field of metal ore leaching development. The spraying and liquid distributing system of the system comprises an intermittent spraying system, a liquid distributing pipeline, an intermittent spraying control valve, a spraying dripper and a spraying pipeline, wherein the liquid collecting circulation system comprises a liquid collecting pipeline, a liquid collecting channel, a liquid collecting pool, a mine pile bottom cushion layer, a liquid storage pool, a leachate reversing valve and a circulation pipeline, the intelligent monitoring system comprises a sensor and an intelligent control system, and the reinforced leaching system comprises a mine pile and a forced inflation system. Two spraying pipelines are positioned at the top of the ore heap and are arranged in a staggered way and are not communicated with each other, and the included angle of the pipelines of the adjacent hoses is 105 ° Each hoseIs provided with a drip irrigation port. The lower part of the ore heap is sequentially provided with a liquid collecting ditch and an ore heap bottom cushion layer; the sensors are uniformly distributed at the top, the middle part and the lower part of the ore pile; the intelligent control system realizes the full-flow real-time monitoring and control of the liquid holding behavior and the leaching efficiency of the ore heap. The invention can realize the mineral reinforced leaching.
Description
Technical Field
The invention relates to the technical field of metal ore leaching development, in particular to a system and a method for reinforcing copper sulfide ore heap bioleaching by using intermittent liquid distribution.
Background
The copper ore resource in China has poor endowment, complex mineral composition and serious secondary accompanying phenomenon, the conventional mining and selecting method has the problems of high cost, low efficiency and the like, the requirement gap of the copper ore resource is obvious, and the long-term requirement of the economic development of China on the copper ore resource is difficult to completely meet. By adopting the biological heap leaching technology, the leaching efficiency of copper sulfide ore resources can be effectively improved, and the method is widely applied to China, Chilean, Canada, USA and other countries.
As an important occurrence transfer medium of soluble ions and solutes, the leaching solution and the flow distribution rule thereof influence the reaction mass transfer and leaching efficiency. However, due to the poor spraying operation mode and the laggard ore heap collaborative control mode, the outstanding problems of solution preferential flow development, poor distribution uniformity of seepage paths, ubiquitous seepage blind areas and the like exist in the ore heap, so that the ore heap has poor liquid holding rate, low oxygen content and low activity of ore leaching bacteria, the leaching efficiency of biological heap leaching is finally low, even dead heap is induced, and the industrial biological heap leaching operation and popularization and application are severely restricted.
The intermittent spraying operation of the ore heap refers to a method for performing spraying and liquid distributing operation on the surface of the ore heap discontinuously. Briefly stated, the following: and stopping spraying after the liquid distribution system sprays the ore pile for a period of time, stopping spraying for a period of time, and starting spraying operation again, and repeating the steps in such a circulating way, wherein the liquid distribution method corresponds to the continuous spraying operation. At present, the operation of intermittent type spraying is mainly applied to the agricultural irrigation field at home and abroad, and is less applied to the field of ore piles, especially, the pipe network laying and management and control method research of the operation of intermittent type spraying of the ore piles is deficient, the application condition of the existing ore pile spraying and liquid distributing is synthesized, and the following three problems mainly exist: 1) in conventional continuous spraying operation, the solution causes the dominant path of the solution in the pile to be excessively developed, and a large amount of solution flows out of the ore pile when the solution does not reach a reaction interface, so that a large amount of ore leaching blind areas exist in the pile; 2) the pipeline layout of the existing ore heap intermittent liquid distribution is relatively fixed, and the spraying pipelines are mostly laid in a parallel manner, so that the solution preferential flow in the heap cannot be disturbed fundamentally, and a large amount of solution still flows out of the ore heap along the original solution dominant path; 3) the spraying and liquid distributing mode is lack of change, the spraying-stopping operation is mostly carried out on the same pipeline, methods such as inflation operation and liquid distributing pipeline changing are lacked, so that the flow path of the solution in the pile is rigid, the liquid holding operation is poor, and the ore leaching efficiency is low. In view of the above, a system and a method for enhancing copper sulfide ore heap bioleaching by intermittent liquid distribution are in need of innovation.
Disclosure of Invention
The invention aims to provide a system and a method for reinforcing copper sulfide ore biological heap leaching by using intermittent liquid distribution.
The system comprises a spraying and liquid distributing system, a liquid collecting circulation system, an intelligent monitoring system and a reinforced leaching system, wherein the spraying and liquid distributing system comprises an intermittent spraying system, a liquid distributing pipeline, an intermittent spraying control valve, a spraying pipeline and a drip irrigation opening;
the forced inflation system is connected with the bottom of the ore pile, the lower part of the ore pile is provided with a liquid collecting channel, and an ore pile bottom cushion layer is laid; the upper part of the ore pile is provided with an intermittent spraying system, the intermittent spraying system is connected with a liquid storage tank through a liquid distribution pipeline, the liquid storage tank is connected with a liquid collection tank through a circulating pipeline, the liquid collection pipeline is connected with the liquid collection tank through a liquid collection pipeline, and liquid holding parameter monitoring sensors are uniformly distributed on the top, the middle and the lower part of the ore pile for 3 layers in total and used for monitoring the liquid holding rate of the internal area of the ore pile; the leaching parameter monitoring sensor is immersed below the liquid level of the leaching solution in the liquid collecting channel; the intelligent management and control system is connected with a forced inflation system, a leaching parameter monitoring sensor, a liquid holding parameter monitoring sensor, an intermittent spraying system, a liquid collecting tank, a leaching liquid reversing valve, an intermittent spraying control valve and a liquid storage tank through electric signal pipelines.
And the circulating pipeline and the liquid collecting pipeline are connected to the liquid collecting tank through the leachate reversing valve.
The spraying pipelines comprise a first spraying pipeline and a second spraying pipeline which are respectively positioned at the top of the ore pile and are arranged in a staggered manner and are not communicated with each other; the first spraying pipeline is provided with a first spraying pipeline valve and a first spraying dripper, the second spraying pipeline is provided with a second spraying pipeline valve and a second spraying dripper, the first spraying pipeline valve, the first spraying dripper, the second spraying pipeline valve and the second spraying dripper are controlled by an intermittent spraying control valve, and the intermittent spraying control valve is connected with the liquid storage tank.
The liquid distribution pipeline, the circulating pipeline, the liquid collecting pipeline and the spraying pipeline are all made of acid-resistant, corrosion-resistant and wear-resistant hoses.
The intelligent management and control system judges the concentration of the leaching solution, the leaching solution reversing valve is used for controlling and shunting the solution, the high-concentration solution enters the liquid collecting tank, and the low-concentration solution flows back to the liquid collecting tank through the circulating pipeline.
The first spraying pipeline and the second spraying pipeline are hoses made of corrosion-resistant and wear-resistant materials, the hoses are arranged in a zigzag mode in a staggered mode, the included angle of the pipelines of the adjacent hoses is 105 degrees, each hose is provided with a drip irrigation opening in a drilled mode, the drip irrigation openings are evenly distributed, and the distance between the adjacent drip irrigation openings is 20cm and used for intermittent drip irrigation operation.
The intelligent control system controls the intermittent spraying control valve to intermittently inject liquid into the first spraying pipeline and the second spraying pipeline, the two pipelines do not inject liquid at the same time, and the solution flows into the ore heap through the first spraying dripper, the second spraying dripper and the drip irrigation port respectively.
The system adopts an intelligent management and control system to carry out signal pickup and command management and control on a liquid holding parameter monitoring sensor, a leaching liquid reversing valve, an intermittent spraying control valve, a first spraying pipeline and a second spraying pipeline.
In the heap leaching process, gas circulation is injected from the bottom of the ore heap through a forced inflation system, liquid circulation is injected from the top of the ore heap through an intermittent spraying system and a liquid distribution pipeline, and the gas-liquid transmission process is cooperatively controlled by an intelligent control system.
The method for applying the system comprises the following steps:
s1: a pile building preparation stage: before liquid distribution leaching, a liquid collection ditch and a bottom cushion layer of an ore pile are sequentially laid, the ore pile is built by using crushed ore or granulated particles, liquid holding parameter monitoring sensors are pre-embedded at the bottom, the middle and the top of the ore pile in the building process, a forced inflation system is arranged at the bottom of the ore pile, and mineral leaching parameter monitoring sensors are arranged in the liquid collection ditch;
s2: and (3) a pipe network laying stage: an intermittent spraying system and a liquid distribution pipeline are arranged on the surface of the ore pile, and a first spraying pipeline and a second spraying pipeline are arranged in a staggered manner;
s3: a pipe network leakage detection and control system inspection stage: in order to avoid the poor blockage of a drip irrigation and a spray irrigation opening, a first spray dripper, a second spray dripper and the drip irrigation opening on the pipeline are subjected to spot inspection, and an intelligent management and control system is subjected to test run, so that the forced inflation system, a liquid holding parameter monitoring sensor, an electric signal pipeline, a leachate reversing valve, an ore leaching parameter monitoring sensor, an intermittent spray control valve, a first spray pipeline valve and a second spray pipeline valve are ensured to be in good states;
s4: initial wetting stage: under the regulation and control of the intelligent control system, the leaching solution in the liquid storage tank is pumped to a solution distribution system by using a solution distribution pipeline; closing the intermittent spraying control valve, the first spraying water dropper and the second spraying water dropper, carrying out drip irrigation on the leaching solution to the surface of the ore heap through the drip irrigation port, monitoring the liquid holding rate of each part in the ore heap by using the liquid holding parameter monitoring sensor to achieve a basic stable state, and ending the initial wetting in the stage;
s5: and (3) a conventional liquid distribution stage: after the initial wetting is finished, starting a first spray dripper and a second spray dripper by using an intelligent control system to perform conventional spraying operation; continuously monitoring the liquid holdup rate and the leaching parameters of the ore pile by using a liquid holdup parameter monitoring sensor and a leaching parameter monitoring sensor, pumping high-concentration leaching liquid to a liquid collecting tank through a liquid collecting pipeline by using a leaching liquid reversing valve, pumping low-concentration leaching liquid to the liquid storing tank through a circulating pipeline, and continuing a conventional liquid distribution stage for 3-5 days;
s6: a first intermittent liquid distribution stage: in order to regulate and control the internal liquid holding state of the ore heap, after the liquid is distributed conventionally, an intelligent management and control system is utilized to start an intermittent spraying control valve and a first spraying pipeline valve, a second spraying pipeline valve is closed, leaching liquid is pumped to the ore heap along the first spraying pipeline and then enters the ore heap through a first spraying dripping head and a first dripping opening; under the control of the intelligent control system, stopping liquid distribution after the liquid distribution lasts for 20 hours, and starting a forced inflation system to enable oxygen-enriched air to enter the ore heap from bottom to top, wherein the inflation duration is 4 hours;
s7: and a second intermittent liquid distribution stage: starting a spraying pipeline two-valve and closing a spraying pipeline one-valve by using an intelligent control system, pumping leaching solution to the ore heap along a spraying pipeline two, and then entering the ore heap through a spraying water dropper two and a drip irrigation port; under the control of the intelligent control system, stopping liquid distribution after the liquid distribution lasts for 20 hours, and starting a forced inflation system to enable oxygen-enriched air to enter the ore heap from bottom to top, wherein the duration of inflation is 4 hours;
s8: and (3) a continuous intermittent liquid distribution stage: performing intermittent liquid distribution circulation and inflation operation on the S6 and the S7 by using an intelligent control system; continuously monitoring the liquid holdup and the leaching parameters of the ore pile by using a liquid holdup parameter monitoring sensor and a leaching parameter monitoring sensor respectively;
s9: strengthening liquid collection and finishing spraying: when the leaching parameter monitoring sensor monitors that the leaching parameter reaches a peak value, the intelligent control system is used for stopping liquid distribution; piling the newly crushed ore or the granulated particles on the ore heap, dismantling the original liquid distribution system and re-distributing the liquid distribution system to the upper surface of the newly piled ore heap, and repeating the steps of S1-S8 to realize continuous and efficient leaching of the ore heap.
The technical scheme of the invention has the following beneficial effects:
in the scheme, the full-flow remote control of the liquid retention behavior of the ore heap and the leaching of minerals is realized by combining an intelligent control system; the method comprises the following steps of realizing real-time monitoring of liquid holding conditions and a liquid holding process based on an ore leaching parameter monitoring sensor and a liquid holding parameter monitoring sensor, and disturbing ore heap solution and providing oxygen for biological leaching reaction by using a forced inflation system; the device such as a liquid distribution pipeline, an intermittent spraying system, an intermittent spraying control valve, a pipeline control valve and the like is utilized to realize the enhancement of the intermittent liquid distribution operation and the solution seepage process of the ore heap; the circulation of leaching liquid is realized through a leaching liquid reversing valve and a circulating pipeline. The system has simple structure, practical and simple method and high feasibility, and can be used for carrying out the bioleaching operation of the copper sulfide ore heap under the condition of intermittent liquid distribution.
Drawings
FIG. 1 is a schematic diagram of a system for reinforcing copper sulfide ore heap bioleaching by using intermittent liquid distribution according to the present invention;
FIG. 2 is a schematic top view of the present invention illustrating the use of intermittent liquid distribution to enhance copper sulfide ore heap bioleaching;
fig. 3 is a schematic view of the staggered arrangement of the intermittent liquid distribution lines at the top of the heap in accordance with the present invention.
Wherein: 1-forced air charging system; 2-collecting liquid channel; 3-liquid holding parameter monitoring sensor; 4-stacking; 5-intermittent spraying system; 6-liquid distribution pipeline; 7-a liquid storage tank; 8-a circulation line; 9-an electrical signal line; 10-leachate reversing valve; 11-a liquid collecting pipeline; 12-a liquid collecting tank; 13-an intelligent management and control system; 14-mineral leaching parameter monitoring sensors; 15-heap bottom bedding; 16-intermittent spray control valve; 17-spraying the first dripping head; 18-spraying a second water dropper; 19-a first spraying pipeline; 20-a second spraying pipeline; 21-a valve of the spraying pipeline; 22-a spray line valve; 23-drip irrigation opening.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
The invention provides a system and a method for reinforcing copper sulfide ore heap bioleaching by using intermittent liquid distribution.
As shown in fig. 1, the system comprises a spraying and liquid distributing system, a liquid collecting circulation system, an intelligent monitoring system and an enhanced leaching system, wherein the spraying and liquid distributing system comprises an intermittent spraying system 5, a liquid distributing pipeline 6, an intermittent spraying control valve 16, a spraying pipeline and a drip irrigation opening 23, the liquid collecting circulation system comprises a liquid collecting pipeline 11, a liquid collecting channel 2, a liquid collecting pool 12, a mine pile bottom cushion layer 15, a liquid storage pool 7, a leachate reversing valve 10 and a circulation pipeline 8, the intelligent monitoring system comprises a liquid holding parameter monitoring sensor 3, an intelligent control system 13, a mine leaching parameter monitoring sensor 14 and an electric signal pipeline 9, and the enhanced leaching system comprises a mine pile 4 and a forced inflation system 1;
the forced inflation system 1 is connected with the bottom of the ore heap 4, the liquid collecting channel 2 is arranged at the lower part of the ore heap 4, and the ore heap bottom cushion layer 15 is laid; an intermittent spraying system 5 is arranged at the upper part of the ore pile 4, the intermittent spraying system 5 is connected with a liquid storage tank 7 through a liquid distribution pipeline 6, the liquid storage tank 7 is connected with a liquid collection tank 12 through a circulating pipeline 8, a liquid collection ditch 2 is connected with the liquid collection tank 12 through a liquid collection pipeline 11, and liquid holding parameter monitoring sensors 3 are uniformly distributed at the top, the middle and the lower part of the ore pile 4 for 3 layers in total and used for monitoring the liquid holding rate of the internal area of the ore pile; the leaching parameter monitoring sensor 14 is immersed below the liquid level of the leaching solution in the liquid collecting channel 2; the intelligent management and control system 13 is connected with the forced inflation system 1, the leaching parameter monitoring sensor 14, the liquid holding parameter monitoring sensor 3, the intermittent spraying system 5, the liquid collecting tank 12, the leaching liquid reversing valve 10, the intermittent spraying control valve 16 and the liquid storing tank 7 through an electric signal pipeline 9.
The circulating pipeline 8 and the liquid collecting pipeline 11 are connected to a liquid collecting tank 12 after passing through a leaching liquid reversing valve 10.
The spraying pipelines comprise a first spraying pipeline 19 and a second spraying pipeline 20, and the first spraying pipeline 19 and the second spraying pipeline 20 are positioned at the top of the ore pile 4 and are arranged in a staggered manner and are not communicated with each other; the first spraying pipeline 19 is provided with a first spraying pipeline valve 21 and a first spraying dripper 17, the second spraying pipeline 20 is provided with a second spraying pipeline valve 22 and a second spraying dripper 18, the first spraying pipeline valve 21, the first spraying dripper 17, the second spraying pipeline valve 22 and the second spraying dripper 18 are controlled by an intermittent spraying control valve 16, and the intermittent spraying control valve 16 is connected with the liquid storage tank 7.
The liquid distribution pipeline 6, the circulating pipeline 8, the liquid collection pipeline 11 and the spraying pipeline are all made of acid-resistant, corrosion-resistant and wear-resistant hoses.
As shown in fig. 2, the intelligent management and control system 13 determines the concentration of the leachate, controls and shunts the solution by using the leachate reversing valve 10, the high-concentration solution enters the liquid collecting tank 12, and the low-concentration solution flows back to the liquid storage tank 7 through the circulating pipeline 8. An intelligent control system 13 is used for controlling an intermittent spraying control valve 16, liquid is intermittently injected into a first spraying pipeline 19 and a second spraying pipeline 20, the liquid is not injected into the two pipelines at the same time, and solution flows into the ore heap through a first spraying dripper 17, a second spraying dripper 18 and a drip irrigation port 23 respectively; and an intelligent control system 13 is adopted to carry out signal pickup and command control on the liquid holding parameter monitoring sensor 3, the leachate reversing valve 10, the intermittent spraying control valve 16, the first spraying pipeline 21 and the second spraying pipeline 22.
In the actual design, as shown in fig. 3, the first spraying pipeline 19 and the second spraying pipeline 20 are both corrosion-resistant and wear-resistant hoses, the hoses are arranged in a zigzag staggered manner, the included angle of the pipelines of the adjacent hoses is 105 degrees, each hose is drilled with a drip irrigation port 23, the drip irrigation ports 23 are uniformly distributed, and the distance between the adjacent drip irrigation ports 23 is 20cm and used for intermittent drip irrigation.
In the heap leaching process, gas circulation is injected from the bottom of the ore heap 4 through the forced inflation system 1, liquid circulation is injected from the top of the ore heap 4 through the intermittent spraying system 5 and the liquid distribution pipeline 6, and the gas-liquid transmission process is cooperatively controlled by the intelligent control system 13.
The following description is provided in connection with the specific application of the system.
In the specific application, heap leaching is carried out according to the following steps:
s1: a pile building preparation stage: before liquid distribution leaching, a liquid collection ditch 2 and an ore pile bottom cushion layer 15 are sequentially laid, ore crushing or granulation particles are utilized for building a pile, liquid holding parameter monitoring sensors 3 are pre-buried at the bottom, the middle and the top of an ore pile 4 in the pile building process, a forced inflation system 1 is laid at the bottom of the ore pile 4, and an ore leaching parameter monitoring sensor 14 is laid in the liquid collection ditch 2;
s2: and (3) a pipe network laying stage: an intermittent spraying system 5 and a liquid distribution pipeline 6 are arranged on the surface of the ore heap 4, and a first spraying pipeline 19 and a second spraying pipeline 20 are arranged in a staggered manner; connecting the liquid distribution devices, taking a spraying pipeline as an example, and sequentially connecting a liquid storage tank, an intermittent spraying control valve, a spraying pipeline valve, a spraying dripping head, a spraying pipeline I, a liquid collecting channel, a liquid collecting pipeline, a leachate reversing valve and a circulating pipeline by using the liquid distribution pipeline as shown in figure 3 to realize through circulation of the leaching liquid;
s3: a checking stage of pipe network leak detection and control system: in order to avoid poor blockage of a drip irrigation and a sprinkling irrigation opening, a first spray dripper 17, a second spray dripper 18 and a drip irrigation opening 23 on a pipeline are subjected to spot inspection, and an intelligent management and control system 13 is subjected to test run, so that the forced inflation system 1, a liquid holding parameter monitoring sensor 3, an electric signal pipeline 9, a leachate reversing valve 10, an ore leaching parameter monitoring sensor 14, an intermittent spray control valve 16, a first spray pipeline valve 21 and a second spray pipeline valve 22 are ensured to be in good states;
s4: initial wetting stage: under the regulation and control of the intelligent control system 13, the leaching solution in the liquid storage tank 7 is pumped to the liquid distribution system 5 by using the liquid distribution pipeline 6; closing the intermittent spraying control valve 16, the first spraying water dropper 17 and the second spraying water dropper 18, carrying out drip irrigation on the leaching solution to the surface of the ore heap through the drip irrigation port 9, monitoring the liquid holdup at each position in the ore heap 4 by using the liquid holdup parameter monitoring sensor 3 to reach a basic stable state, and finishing the initial wetting in the stage;
s5: and (3) a conventional liquid distribution stage: after the initial wetting is finished, starting a first spray dripper 17 and a second spray dripper 18 by using an intelligent control system 13 to perform conventional spraying operation; continuously monitoring the liquid holding rate and the leaching parameters of the ore pile 4 by using a liquid holding parameter monitoring sensor 3 and a leaching parameter monitoring sensor 14, pumping high-concentration leaching liquid to a liquid collecting tank 12 through a liquid collecting pipeline 11 by using a leaching liquid reversing valve 10, pumping low-concentration leaching liquid to a liquid storage tank 7 through a circulating pipeline 8, and continuously carrying out a conventional liquid distribution stage for 3-5 days;
s6: a first intermittent liquid distribution stage: in order to regulate and control the internal liquid holding state of the ore heap 4, after the liquid is distributed conventionally, the intelligent management and control system 13 is utilized to start the intermittent spraying control valve 16 and the first spraying pipeline valve 21, close the second spraying pipeline valve 22, pump the leaching solution to the ore heap 4 along the first spraying pipeline 19, and then enter the ore heap 4 through the first spraying dripping head 17 and the drip irrigation port 9; under the control of the intelligent control system 13, the liquid distribution is stopped after the liquid distribution is continued for 20 hours, the forced inflation system 1 is started, so that the oxygen-enriched air enters the ore heap 4 from bottom to top, and the inflation duration is 4 hours;
s7: intermittent liquid distribution second stage: by utilizing the intelligent management and control system 13, the spraying pipeline second valve 22 is started, the spraying pipeline first valve 21 is closed, and the leaching solution is pumped to the ore heap 4 along the spraying pipeline second 20 and then enters the ore heap 4 through the spraying dripper second 18 and the drip irrigation port 9; under the control of the intelligent control system 13, the liquid distribution is stopped after the liquid distribution is continued for 20 hours, the forced inflation system 1 is started, so that the oxygen-enriched air enters the ore heap 4 from bottom to top, and the inflation duration is 4 hours;
s8: and (3) a continuous intermittent liquid distribution stage: performing intermittent liquid distribution circulation and inflation operation on the S6 and the S7 by using an intelligent management and control system 13; continuously monitoring the liquid holdup and ore leaching parameters of the ore pile 4 by using a liquid holdup parameter monitoring sensor 3 and an ore leaching parameter monitoring sensor 14 respectively;
s9: strengthening liquid collection and finishing spraying: when the leaching parameter monitoring sensor 14 monitors that the leaching parameter reaches a peak value, the intelligent control system 13 is used for stopping liquid distribution; piling the newly crushed ore or the granulated particles on the ore heap 4, dismantling the original liquid distribution system 6 and re-arranging the newly piled ore heap 4, and repeating the steps of S1-S8 to realize continuous and efficient leaching of the ore heap.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (9)
1. A system for reinforcing copper sulfide ore biological heap leaching by using intermittent liquid distribution is characterized by comprising a spraying liquid distribution system, a liquid collection circulation system, an intelligent monitoring system and a reinforced leaching system, wherein the spraying liquid distribution system comprises an intermittent spraying system, a liquid distribution pipeline, an intermittent spraying control valve, a spraying pipeline and a drip irrigation opening;
the forced inflation system is connected with the bottom of the ore pile, the lower part of the ore pile is provided with a liquid collecting channel, and an ore pile bottom cushion layer is laid; the upper part of the ore pile is provided with an intermittent spraying system, the intermittent spraying system is connected with a liquid storage tank through a liquid distribution pipeline, the liquid storage tank is connected with a liquid collection tank through a circulating pipeline, the liquid collection pipeline is connected with the liquid collection tank through a liquid collection pipeline, and liquid holding parameter monitoring sensors are uniformly distributed on the top, the middle and the lower part of the ore pile, and are distributed in 3 layers in total and used for monitoring the liquid holding rate of the internal area of the ore pile; the leaching parameter monitoring sensor is immersed below the liquid level of the leaching liquid in the liquid collecting channel; the intelligent management and control system is connected with a forced inflation system, a leaching parameter monitoring sensor, a liquid holding parameter monitoring sensor, an intermittent spraying system, a liquid collecting tank, a leaching liquid reversing valve, an intermittent spraying control valve and a liquid storage tank through electric signal pipelines.
2. The system for enhancing copper sulfide ore heap bioleaching with intermittent liquid distribution as claimed in claim 1, wherein the circulation pipeline and the liquid collecting pipeline are connected to the liquid collecting tank through a leachate reversing valve.
3. The system for enhancing copper sulfide ore heap bioleaching by intermittent liquid distribution according to claim 1, wherein the spraying pipelines comprise a first spraying pipeline and a second spraying pipeline which are respectively positioned at the top of the ore heap and are arranged in a staggered manner and are not communicated with each other; the first spraying pipeline is provided with a first spraying pipeline valve and a first spraying dripper, the second spraying pipeline is provided with a second spraying pipeline valve and a second spraying dripper, the first spraying pipeline valve, the first spraying dripper, the second spraying pipeline valve and the second spraying dripper are controlled by an intermittent spraying control valve, and the intermittent spraying control valve is connected with the liquid storage tank.
4. The system for enhancing copper sulfide ore heap bioleaching with intermittent liquid distribution as claimed in claim 1, wherein the liquid distribution pipeline, the circulation pipeline, the liquid collection pipeline and the spraying pipeline are made of acid-resistant, corrosion-resistant and wear-resistant hoses.
5. The system for enhancing copper sulfide ore heap bioleaching by intermittent liquid distribution according to claim 1, wherein the intelligent management and control system judges the concentration of the leaching solution, the leaching solution reversing valve is used for controlling and shunting the solution, the high-concentration solution enters the liquid collecting tank, and the low-concentration solution flows back to the liquid collecting tank through the circulating pipeline.
6. The system for strengthening copper sulfide ore heap bioleaching by intermittent liquid distribution according to claim 3, wherein the first spraying pipeline and the second spraying pipeline are both corrosion-resistant and wear-resistant hoses, the hoses are arranged in a zigzag staggered manner, the included angle between the adjacent hoses is 105 degrees, each hose is drilled with drip irrigation ports, the drip irrigation ports are uniformly arranged, and the distance between the adjacent drip irrigation ports is 20cm and used for intermittent drip irrigation operation.
7. The system for reinforcing copper sulfide ore heap bioleaching by intermittent liquid distribution according to claim 1, wherein the intelligent management and control system controls an intermittent spraying control valve to intermittently inject liquid into the first spraying pipeline and the second spraying pipeline, and the liquid injection is not performed at the same time by the two pipelines.
8. The system for enhancing copper sulfide ore biological heap leaching by intermittent liquid distribution according to claim 1, wherein in the heap leaching process, gas is circulated and injected from the bottom of the heap through a forced inflation system, liquid is circulated and injected from the top of the heap through an intermittent spraying system and a liquid distribution pipeline, and a gas-liquid transmission process is cooperatively controlled by an intelligent control system.
9. The method for applying the system for the heap bioleaching of copper sulphide ores with batch liquor distribution according to claim 1, characterised in that it includes the following steps:
s1: a pile building preparation stage: before liquid distribution leaching, a liquid collection ditch and a bottom cushion layer of a mineral pile are laid in sequence, broken ore or granulated particles are utilized for building the mineral pile, liquid holding parameter monitoring sensors are pre-buried at the bottom, the middle and the top of the mineral pile in the building process, a forced inflation system is arranged at the bottom of the mineral pile, and mineral leaching parameter monitoring sensors are arranged in the liquid collection ditch;
s2: and (3) a pipe network laying stage: an intermittent spraying system and a liquid distribution pipeline are arranged on the surface of the ore heap, and a first spraying pipeline and a second spraying pipeline are arranged in a staggered manner;
s3: a checking stage of pipe network leak detection and control system: in order to avoid poor blockage of a drip irrigation and a spray irrigation opening, a first spray dripper, a second spray dripper and the drip irrigation opening on the pipeline are subjected to spot check, and an intelligent management and control system is subjected to test run to ensure that a forced inflation system, a liquid holding parameter monitoring sensor, an electric signal pipeline, a leachate reversing valve, an ore leaching parameter monitoring sensor, an intermittent spray control valve, a first spray pipeline valve and a second spray pipeline valve are in good states;
s4: initial wetting stage: under the regulation and control of the intelligent control system, the leaching solution in the liquid storage tank is pumped to a solution distribution system by using a solution distribution pipeline; closing the intermittent spraying control valve, the first spraying water dropper and the second spraying water dropper, carrying out drip irrigation on the leaching solution to the surface of the ore heap through a drip irrigation port, monitoring the liquid holdup rate of each part in the ore heap by using a liquid holdup parameter monitoring sensor to reach a basic stable state, and finishing the initial wetting in the stage;
s5: and (3) a conventional liquid distribution stage: after the initial wetting is finished, starting a first spray dripper and a second spray dripper by using an intelligent control system to perform conventional spraying operation; continuously monitoring the liquid holdup rate and the leaching parameters of the ore pile by using a liquid holdup parameter monitoring sensor and a leaching parameter monitoring sensor, pumping high-concentration leaching liquid to a liquid collecting tank through a liquid collecting pipeline by using a leaching liquid reversing valve, pumping low-concentration leaching liquid to the liquid storing tank through a circulating pipeline, and continuing a conventional liquid distribution stage for 3-5 days;
s6: intermittent liquid distribution first stage: in order to regulate and control the internal liquid holding state of the ore heap, after the liquid is distributed conventionally, an intelligent management and control system is utilized to start an intermittent spraying control valve and a first spraying pipeline valve, close a second spraying pipeline valve, pump the leaching liquid to the ore heap along the first spraying pipeline, and then enter the ore heap through a first spraying dripping head and a dripping opening; under the control of the intelligent control system, stopping liquid distribution after the liquid distribution lasts for 20 hours, and starting a forced inflation system to enable oxygen-enriched air to enter the ore heap from bottom to top, wherein the duration of inflation is 4 hours;
s7: and a second intermittent liquid distribution stage: starting a spraying pipeline two-valve by using an intelligent control system, closing a spraying pipeline one-valve, pumping leaching solution to the ore heap along a spraying pipeline two, and then entering the ore heap through a spraying dripper two and a drip irrigation port; under the control of the intelligent control system, stopping liquid distribution after the liquid distribution lasts for 20 hours, and starting a forced inflation system to enable oxygen-enriched air to enter the ore heap from bottom to top, wherein the inflation duration is 4 hours;
s8: and (3) a continuous intermittent liquid distribution stage: performing intermittent liquid distribution circulation and inflation operation on the S6 and the S7 by using an intelligent control system; continuously monitoring the liquid holdup and the leaching parameters of the ore pile by using a liquid holdup parameter monitoring sensor and a leaching parameter monitoring sensor respectively;
s9: strengthening liquid collection and finishing spraying: when the leaching parameter monitoring sensor monitors that the leaching parameter reaches a peak value, the intelligent control system is used for stopping liquid distribution; piling the newly crushed ore or the granulated particles on the ore heap, dismantling the original liquid distribution system and re-distributing the liquid distribution system to the upper surface of the newly piled ore heap, and repeating the steps of S1-S8 to realize continuous and efficient leaching of the ore heap.
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