Efficient-utilization copper-cobalt ore dump leaching treatment method

Abstract

The invention relates to the technical field of metallurgy, in particular to an efficient-utilization copper-cobalt ore dump leaching treatment method which comprises the steps that after copper-cobalt sulfide ore and copper-cobalt oxide ore are subjected to crushing treatment respectively, heap building is conducted; a solution of acidithiobacillus ferrooxidans is added into a sulfuric acid solution to serve as spraying liquid, heap leaching treatment is conducted on the heap-built copper-cobalt ore through a spraying device, and the spraying flow of the spraying device is controlled in the heap leaching treatment process according to changes of the environment temperature and humidity and changes of the pH value of heap leaching liquid; the obtained dump leaching liquid is subjected to extraction-electrodeposition treatment, and cathode metal copper, sediment and raffinate are obtained; and the raffinate serves as spraying liquid to be subjected to spraying circulation, precipitation is neutralized, and metal cobalt is recycled. The spraying flow of the spraying device is accurately controlled and adjusted, and the leaching effect of copper and cobalt metal in the copper-cobalt ore is improved.

Description

Technical Field

[0001] This application relates to the field of metallurgical technology, and particularly relates to a method for heap leaching treatment of copper-cobalt ore with high efficiency utilization. Background Art

[0002] In the mineral development of copper-cobalt resources, low-grade copper-cobalt ores with relatively low copper and cobalt contents are continuously produced. Most of the existing processes are to carry out heap leaching treatment on low-grade copper-cobalt ores to improve the recovery rate of copper and cobalt metals in the copper-cobalt ores, so as to achieve the high-efficiency utilization of low-grade copper-cobalt ores. At the same time, the current heap leaching process is to add a solution of Acidithiobacillus ferrooxidans to sulfuric acid solution as a spraying liquid to spray the copper-cobalt ore, and carry out extraction-electrowinning treatment on the heap leaching solution after spraying. Controlling and adjusting the spraying flow rate during the heap leaching process of copper-cobalt ore can effectively improve the leaching of copper and cobalt metals, making the leaching of copper and cobalt metals more stable and efficient.

[0003] By controlling and adjusting the spraying flow rate of the spraying device during the heap leaching process of copper-cobalt ore, the leaching of copper and cobalt metals can be effectively improved, making the leaching of copper and cobalt metals more stable and efficient. However, in the existing process, the spraying device usually sets a single fixed spraying flow rate, and the interference and influence of environmental temperature and humidity factors during the spraying process are relatively complex. The existing process does not fully consider the interference and influence of environmental temperature and humidity factors on the spraying process, and it is difficult to accurately control and adjust the spraying flow rate of the spraying device, resulting in poor leaching effect of copper and cobalt metals in the copper-cobalt ore, and thus unable to efficiently utilize the copper and cobalt metals in the copper-cobalt ore. Summary of the Invention

[0004] In view of the above, it is necessary to provide a method for heap leaching treatment of copper-cobalt ore with high efficiency utilization to solve the above problems.

[0005] An embodiment of this application provides a method for heap leaching treatment of copper-cobalt ore with high efficiency utilization, and the method includes: Carry out crushing treatment on copper-cobalt sulfide ore and copper-cobalt oxide ore respectively; heap up the crushed copper-cobalt sulfide ore and copper-cobalt oxide ore; add a solution of Acidithiobacillus ferrooxidans to sulfuric acid solution as a spraying liquid, and carry out heap leaching treatment on the heap of copper-cobalt ore through a spraying device; Collect the temperature and humidity of the spraying environment, the spraying flow rate of the spraying device, and the pH value of the heap leaching solution at each collection moment during the heap leaching treatment process; based on the similarity degree of the changes between temperature and humidity during each collection moment and the previous preset time period, combined with the similarity degree of the changes between humidity and spraying flow rate, obtain the evaporation interference degree at each collection moment; based on the chaos degree and average change amplitude of the pH value change of the heap leaching solution during each collection moment and the previous preset time period, obtain the acid-base imbalance degree at each collection moment; obtain the similarity of the changes between the evaporation interference degree and the acid-base imbalance degree during each collection moment and the previous preset time period, and form the similarity change sequence at each collection moment with the similarities obtained during each collection moment and the previous preset time period. Analyze the change characteristics of the elements in the similarity change sequence, obtain the trend continuity degree at each collection moment, multiply it by the element mean value of the corresponding similarity change sequence, and obtain the heap leaching interference persistence degree at each collection moment after normalization processing; adjust the spraying flow rate according to the change characteristics of the heap leaching interference persistence degree, obtain the expected spraying flow rate at each collection moment, and use a PID controller to control the spraying flow rate of the spraying device; Perform extraction-electrowinning treatment on the obtained heap leaching solution to obtain cathode metallic copper, precipitate, and raffinate; use the raffinate as the spraying solution for spraying circulation, and perform neutralization treatment on the precipitate to recover metallic cobalt.

[0006] Preferably, the copper-cobalt sulfide ore and the copper-cobalt oxide ore are respectively crushed to P80 - 20 mm.

[0007] Preferably, the main components of the copper-cobalt sulfide ore are Cu: 0.67 wt% - 1.05 wt%, Co: 0.18 wt% - 0.26 wt%, S: 0.98 wt% - 1.53 wt%.

[0008] Preferably, the main components of the copper-cobalt oxide ore are Cu: 0.65 wt% - 0.72 wt%, Co: 0.17 wt% - 0.27 wt%.

[0009] Preferably, the mass ratio of the copper-cobalt sulfide ore and the copper-cobalt oxide ore after crushing for heap building is: 1:0.23 - 0.36.

[0010] Preferably, the spraying cycle for heap leaching treatment is 180 days.

[0011] Preferably, the process of obtaining the evaporation interference degree at each moment is as follows: Use the sequence composed of temperature data during each collection moment and the previous preset time period as the temperature characteristic sequence at each collection moment. Correspondingly, obtain the humidity characteristic sequence and the spraying flow rate characteristic sequence at each collection moment; For each acquisition moment, the similarity between the first-order difference sequence of the temperature feature sequence and the first-order difference sequence of the humidity feature sequence is denoted as the first similarity; the similarity between the first-order difference sequence of the humidity feature sequence and the first-order difference sequence of the spray flow rate feature sequence is denoted as the second similarity. According to the first similarity and the second similarity, calculate the evaporation interference degree at each acquisition moment during the spraying process, where the evaporation interference degree is positively correlated with the first similarity and negatively correlated with the second similarity.

[0012] Preferably, obtaining the acid-base imbalance degree at each acquisition moment includes: Taking the sequence composed of the pH values at each acquisition moment and in the preset time period before as the pH value feature sequence at each acquisition moment; For the first-order difference sequence of the pH value feature sequence, taking the normalization result of the positive fusion of the element absolute value mean and the information entropy of the elements as the acid-base imbalance degree at each acquisition moment.

[0013] Preferably, obtaining the trend continuity degree at each acquisition moment is specifically: Statistically count the position serial numbers of the elements that are positive in the first-order difference sequence of the similarity change sequence; According to the continuity of the position serial numbers of all positive numbers in the first-order difference sequence and the proportion of positive numbers, calculate the trend continuity degree at each acquisition moment during the spraying process. The specific formula is: ; where, is the trend continuity degree at the jth acquisition moment during the spraying process, is the ratio of the number of positive elements to the total number of elements in the first-order difference sequence of the similarity change sequence at the jth acquisition moment, is the exponential function with the natural constant as the base, 、 are respectively the position serial numbers of the s-th positive element and the (s - 1)-th positive element in the first-order difference sequence of the similarity change sequence at the jth acquisition moment, is the total number of positive elements in the first-order difference sequence of the similarity change sequence at the jth acquisition moment.

[0014] Preferably, obtaining the expected spray flow rate at each acquisition moment is specifically: Calculate the difference between the heap leaching interference persistence degree at each acquisition moment and that at the previous acquisition moment; calculate the sum value of 1 and the difference, and take the product of the obtained sum value and the expected spray flow rate at the previous acquisition moment of each acquisition moment as the expected spray flow rate at each acquisition moment.

[0015] This application has at least the following beneficial effects: (1) The present application analyzes the interference effects of environmental temperature and humidity factors on the spraying process, and obtains the evaporation interference degree in the spraying process according to the changing relationship between the temperature and humidity in the spraying environment and the spraying flow rate. The evaporation interference degree can reflect the complexity of controlling the spraying flow rate of the spraying device, which is conducive to the subsequent accurate control and adjustment of the spraying flow rate of the spraying device, thereby improving the leaching effect of copper and cobalt metals in copper-cobalt ore.

[0016] (2) Based on the evaporation interference degree in the spraying process and combined with the acid-base imbalance characteristics of the copper-cobalt ore in the spraying process, the continuity of the upward trend change in the correlation degree between the evaporation interference characteristics and the acid-base imbalance characteristics in the local time can be more accurately analyzed, and the characteristics of the persistent impact of the evaporation interference in the spraying environment on the heap leaching of copper-cobalt ore can be further more accurately extracted, which can be used to subsequently reduce the persistent impact of the evaporation interference in the spraying environment on the heap leaching of copper-cobalt ore and improve the spraying effect on the copper-cobalt ore.

[0017] (3) This application fully considers the persistent influence characteristics of evaporation interference in the spray environment on the heap leaching of copper-cobalt ore, accurately controls and adjusts the spray flow of the spray device, and achieves more precise control of the spray flow during the heap leaching of copper-cobalt ore. At the same time, it improves the leaching effect of copper and cobalt metals in the copper-cobalt ore, and reduces the content of impurities leached in the copper-cobalt ore, thereby achieving efficient utilization of low-grade copper-cobalt ore. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A flow chart of a highly efficient copper-cobalt ore heap leaching method provided in this application; Figure 2 A flow chart for controlling the spray flow of a spray device provided in this application. DETAILED DESCRIPTION

[0019] In the description of the embodiments of the present application, words such as "exemplary", "or", "for example" and the like are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary", "or", "for example" and the like is intended to present related concepts in a concrete manner.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the present application. The terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application.

[0021] It should be noted that the terms "first" and "second" in this application and its accompanying drawings are used to distinguish similar objects, rather than to describe a specific order or sequence. For the methods disclosed in the embodiments of this application or shown in the flowcharts, which include one or more steps for implementing the methods, without departing from the scope of protection of this application, the execution order of multiple steps can be interchanged with each other, and some steps can also be deleted.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this application belongs.

[0023] Example 1 Example 1 of this application proposes a method for heap leaching treatment of copper-cobalt ore with high efficiency utilization, which is applied to the field of metallurgical technology. Referring to the attached Figure 1 , the method includes: Step 1, raw material crushing: The main components of copper-cobalt sulfide ore are Cu: 1.03 wt%, Co: 0.25 wt%, S: 1.53 wt%; the main components of copper-cobalt oxide ore are Cu: 0.72 wt%, Co: 0.27 wt%. Subsequently, the copper-cobalt sulfide ore and copper-cobalt oxide ore are respectively crushed to P80 - 20 mm to obtain the crushed copper-cobalt sulfide ore and copper-cobalt oxide ore.

[0024] Step 2, heap building: The crushed copper-cobalt sulfide ore and copper-cobalt oxide ore are heap-built by means of alternate feeding, and the mass ratio of copper-cobalt oxide ore to copper-cobalt sulfide ore for heap building is 0.30:1 to obtain the heap-built copper-cobalt ore.

[0025] Step 3, heap leaching treatment: A solution of Acidithiobacillus ferrooxidans is added to the sulfuric acid solution as the spraying liquid, and this solution is sprayed onto the heap-built copper-cobalt ore through a spraying device for heap leaching treatment; the initial spraying flow rate is , and the spraying cycle is 180 days; at the same time, the obtained heap leaching solution is subjected to extraction-electrowinning treatment to obtain cathode metallic copper, precipitate and raffinate respectively. Subsequently, the raffinate is used as the spraying liquid for spraying circulation, and the precipitate is neutralized to recover metallic cobalt.

[0026] Step 301, collect the temperature and humidity of the spraying environment, the spraying flow rate of the spraying device, and the pH value of the heap leaching solution at each collection moment during the heap leaching treatment process.

[0027] During the spraying heap leaching of the heap-built copper-cobalt ore, the actual temperature and humidity in the heap leaching environment of the copper-cobalt ore, the actual spraying flow rate of the spraying device, and the actual pH value of the heap leaching solution are respectively collected by using a temperature and humidity sensor, a flow sensor and a pH sensor. The collection time interval for all sensors to collect data is set to 1 minute, and the implementer can adaptively set according to the actual situation.

[0028] Further, in order to eliminate the data dimension among different parameter data and facilitate the subsequent accurate analysis of the interference effect of environmental temperature and humidity factors on the spraying effect during the spraying process, the actual temperature and humidity within one hour before each collection moment, the actual spraying flow rate of the spraying device, and the actual pH value of the heap leaching solution are respectively subjected to exponential normalization processing, and the data results after exponential normalization are respectively arranged in chronological order to obtain the temperature characteristic sequence, humidity characteristic sequence, spraying flow rate characteristic sequence, and pH value characteristic sequence at each collection moment during the spraying process.

[0029] Step 302: Based on the similarity degree of the changes between temperature and humidity at each collection moment and in the previous preset time period, and combining the similarity degree of the changes between humidity and spraying flow rate, obtain the evaporation interference degree at each collection moment; based on the chaos degree and average change amplitude of the pH value change of the heap leaching solution at each collection moment and in the previous preset time period, obtain the acid-base imbalance degree at each collection moment.

[0030] During the heap leaching process of the copper-cobalt ore after stacking, the interference effect of environmental temperature and humidity factors on the spraying process is relatively complex. For example, environmental temperature and humidity factors will affect the evaporation of the spraying liquid during the spraying process, causing acid-base imbalance in the copper-cobalt ore, thereby affecting the leaching effect of copper and cobalt metals in the copper-cobalt ore. In the existing process, the spraying device usually sets a single fixed spraying flow rate, without fully considering the interference effect of environmental temperature and humidity factors during the spraying process, making it difficult to accurately control and adjust the spraying flow rate of the spraying device, resulting in a low leaching effect of copper and cobalt metals in the copper-cobalt ore, and thus unable to efficiently utilize the copper and cobalt metals in the copper-cobalt ore. Therefore, it is necessary to consider the interference effect of environmental temperature and humidity factors on the spraying process to achieve accurate control and adjustment of the spraying flow rate of the spraying device and improve the leaching effect of copper and cobalt metals in the copper-cobalt ore.

[0031] In order to analyze the interference effect of the environment on the heap leaching process at different sampling times, the first-order difference sequences of the temperature characteristic sequence, humidity characteristic sequence, and spraying flow rate characteristic sequence are respectively calculated. The first-order difference sequence can reflect the changes in temperature, humidity, and spraying flow rate in the actual environment of the heap leaching process. If the similarity of the changes between temperature and humidity within a certain period is higher than the similarity between humidity and spraying flow rate, it can better reflect the evaporation phenomenon of the spraying liquid during the spraying process at this time. At this time, the complexity of controlling the spraying flow rate of the spraying device is higher, and more accurate control and adjustment of the spraying flow rate of the spraying device are required to improve the leaching effect of copper and cobalt metals in the copper-cobalt ore.

[0032] Through the above analysis, calculate the absolute value of the similarity between the first-order difference sequence of the temperature feature sequence and the first-order difference sequence of the humidity feature sequence, which is denoted as the first similarity at each acquisition moment; at the same time, calculate the absolute value of the similarity between the first-order difference sequence of the humidity feature sequence and the first-order difference sequence of the spray flow rate feature sequence, which is denoted as the second similarity at each acquisition moment. The similarity measurement method can be covariance or Pearson correlation coefficient. In this embodiment, covariance is used to measure the similarity. Furthermore, according to the first similarity and the second similarity, calculate the evaporation interference degree at each acquisition moment during the spraying process, where the evaporation interference degree is positively correlated with the first similarity and negatively correlated with the second similarity.

[0033] In this embodiment, the formula form of the evaporation interference degree is specifically as follows: ; In the formula, is the evaporation interference degree at the j-th acquisition moment during the spraying process, is the exponential normalization function, is the first similarity at the j-th acquisition moment, is the second similarity at the j-th acquisition moment, is a preset error parameter, whose function is to avoid the denominator from taking a value of 0. It is taken within a small data range (0.001, 0.005). In this embodiment, the value of the error parameter is 0.005.

[0034] It should be understood that the evaporation interference degree reflects the evaporation effect under the influence of the ambient temperature during the spraying process of copper-cobalt ore. The greater the evaporation interference degree, the more serious the evaporation phenomenon of the spraying liquid during the spraying process, which will affect the leaching effect of copper and cobalt metals in the copper-cobalt ore. It is necessary to accurately control and adjust the spraying flow rate of the spraying device.

[0035] At the same time, if the change in the acid-base balance degree of the heap leaching solution during the heap leaching treatment at this acquisition moment is more unstable, then the acid-base balance in the copper-cobalt ore during the spraying process is worse, which is less conducive to the stable and efficient leaching of copper and cobalt metals in the copper-cobalt ore. In order to analyze the acid-base balance during the spraying process at different acquisition moments, calculate the first-order difference sequence of the pH value feature sequence, and calculate the complexity of all elements in this first-order difference sequence. The complexity measurement method can be information entropy or permutation entropy. In this embodiment, permutation entropy is used to measure the complexity. The greater the complexity, the stronger the randomness and uncertainty of the pH change during the spraying process, and the easier it is to cause acid-base imbalance during the spraying process. Moreover, the first-order difference sequence of the pH value feature sequence reflects the pH change of the copper-cobalt ore during the spraying process. If the average level of the pH change in the copper-cobalt ore is higher, the more it can reflect the characteristics of acid-base imbalance, which affects the leaching effect of copper and cobalt metals in the copper-cobalt ore.

[0036] Therefore, calculate the absolute value mean of all elements in the first-order difference sequence of the pH value characteristic sequence, and denote the exponential normalization result of the product of the absolute value mean and the permutation entropy as the acid-base imbalance degree at each acquisition moment during the spraying process. The acid-base imbalance degree reflects the acid-base imbalance characteristics of the copper-cobalt ore during the spraying process. The greater the acid-base imbalance characteristics, the more unfavorable it is to the leaching effect of copper and cobalt metals in the copper-cobalt ore.

[0037] Step 303: Obtain the similarity between the evaporation interference degree and the acid-base imbalance degree at each acquisition moment and during the previous preset time period, and form the similarity change sequence at each acquisition moment with the similarities obtained at each acquisition moment and during the previous preset time period. Analyze the change characteristics of the elements in the similarity change sequence to obtain the trend continuity degree at each acquisition moment, multiply it by the element mean of the corresponding similarity change sequence, and obtain the heap leaching interference persistence degree at each acquisition moment after normalization processing.

[0038] In order to accurately evaluate the influence of evaporation interference in the spraying environment on the heap leaching effect during the spraying process, the sequences formed by arranging the evaporation interference degree and the acid-base imbalance degree in chronological order within one hour before each acquisition moment are respectively denoted as the evaporation interference sequence and the acid-base imbalance sequence at each acquisition moment, and the covariance method is used to calculate the correlation degree between the evaporation interference sequence and the acid-base imbalance sequence at each acquisition moment. The correlation degree reflects the influence of evaporation interference in the spraying environment on the heap leaching effect. The greater the correlation degree, the greater the influence of evaporation interference in the spraying environment on the heap leaching effect, and the more unfavorable it is to maintain the acid-base balance in the copper-cobalt ore. At this time, it is necessary to accurately control and adjust the spraying flow rate of the spraying device to improve the leaching effect of copper and cobalt metals in the copper-cobalt ore.

[0039] Generally, if the correlation degree between the evaporation interference sequence and the acid-base imbalance sequence is higher within a local time period, and the continuity of the upward trend change is stronger, it indicates that the influence of evaporation interference in the spraying environment on the heap leaching effect is more persistent. At this time, it is more necessary to control and adjust the spraying flow rate of the spraying device to improve the leaching efficiency of copper and cobalt metals in the copper-cobalt ore.

[0040] Furthermore, arrange the correlation degrees corresponding to all acquisition moments within one hour before each acquisition moment in chronological order, denote it as the similarity change sequence at each acquisition moment, calculate the first-order difference sequence of the similarity change sequence, and count the position numbers of the elements that are positive in the first-order difference sequence. For example, the 2nd, 7th, and 11th elements in the first-order difference sequence are all positive, and their position numbers are 2, 7, and 11 respectively.

[0041] Through the above analysis, according to the continuity of the position numbers of all positive numbers in the first-order difference sequence and the proportion of positive numbers, calculate the trend continuity degree at each acquisition moment during the spraying process: ; where is the trend continuity at the j-th acquisition moment during the spraying process, is the ratio of the number of positive elements to the total number of elements in the first-order difference sequence of the similarity change sequence at the j-th acquisition moment, is the exponential function with the natural constant as the base, 、 are respectively the position serial numbers of the s-th positive element and the (s - 1)-th positive element in the first-order difference sequence of the similarity change sequence at the j-th acquisition moment, is the total number of positive elements in the first-order difference sequence of the similarity change sequence at the j-th acquisition moment.

[0042] It should be understood that the trend continuity reflects the continuity of the upward trend change in the correlation degree within a local time. The stronger the continuity of the upward trend change, the more it can reflect the persistent impact of evaporation interference on the heap leaching effect in the spraying environment, and the less likely it is to cause the phenomenon of acid-base imbalance in copper-cobalt ore.

[0043] Furthermore, if the correlation degree between the evaporation interference sequence and the acid-base imbalance sequence within a local time is higher, and the continuity of the upward trend change is stronger, to a certain extent, it indicates that the persistent impact of evaporation interference on the heap leaching effect in the spraying environment is higher. Therefore, calculate the mean value of the similarity change sequences at each acquisition moment during the spraying process, and record the exponential normalization result of the product of this mean value and the trend continuity as the heap leaching interference persistence degree at each acquisition moment during the spraying process. The heap leaching interference persistence degree reflects the persistent impact characteristic of evaporation interference on the copper-cobalt ore heap leaching in the spraying environment. The greater the persistent impact characteristic, the greater the impact of evaporation interference on the heap leaching effect in the spraying environment. At this time, it is more necessary to accurately control and adjust the spraying flow rate of the spraying device, so as to improve the leaching efficiency of copper and cobalt metals in copper-cobalt ore.

[0044] Step 304, adjust the spraying flow rate according to the change characteristics of the heap leaching interference persistence degree to obtain the expected spraying flow rate at each acquisition moment, and use a PID controller to control the spraying flow rate of the spraying device.

[0045] Through the constructed heap leaching interference persistence degree above, the persistent nature of the heap leaching interference during the copper-cobalt ore heap leaching process in the spraying process is monitored in real time. If the heap leaching interference persistence degree at the current acquisition moment rises, it indicates that the impact of the evaporation of the spraying liquid on the heap leaching effect in the spraying environment is more significant. At this time, the spraying flow rate of the spraying device should be appropriately increased to eliminate the impact of the evaporation of the spraying liquid on the heap leaching effect; conversely, if the heap leaching interference persistence degree at the current acquisition moment decreases, it indicates that the impact of the evaporation of the spraying liquid on the heap leaching effect in the spraying environment is smaller. In order to reduce the content of impurities leached in copper-cobalt ore, the spraying flow rate of the spraying device should be appropriately reduced at this time.

[0046] Through the above analysis, calculate the expected spray flow rate at the current acquisition moment during the spraying process: ; where is the expected spray flow rate at the current acquisition moment during the spraying process, is the expected spray flow rate at the previous acquisition moment of the current acquisition moment, is the heap leaching interference persistence at the current acquisition moment, is the heap leaching interference persistence at the previous acquisition moment of the current acquisition moment.

[0047] When the heap leaching interference persistence increases, increase the spray flow rate, and when the heap leaching interference persistence decreases, decrease the spray flow rate, which can more accurately control the spray flow rate during the heap leaching process of copper-cobalt ore, improve the leaching effect of copper and cobalt metals in copper-cobalt ore, and reduce the content of impurities leached from copper-cobalt ore, thereby realizing the efficient utilization of low-grade copper-cobalt ore.

[0048] It should be noted that since the spray is less affected by the environment within the first hour after the start of spraying, and the amount of data within the first hour is insufficient to accurately analyze the interference effect of environmental temperature and humidity factors on the spraying process, the spray flow rate adjustment in this application is carried out one hour after the spraying treatment.

[0049] Furthermore, use a PID controller to more accurately control the spray flow rate of the spraying device. Input the expected spray flow rate and the actual spray flow rate at the current acquisition moment into the PID controller. The PID controller calculates the error between the expected spray flow rate and the actual spray flow rate, and outputs a control signal according to the magnitude of the error; furthermore, transmit the control signal output by the PID controller to the spraying device, so that the actual spray flow rate in the spraying device continuously approaches the expected spray flow rate, realizing accurate control and adjustment of the spray flow rate of the spraying device.

[0050] Among them, the flow chart for controlling the spray flow rate of the spraying device is as Figure 2 shown.

[0051] Example 2 Example 2 of this application proposes a method for heap leaching treatment of copper-cobalt ore for efficient utilization, which is applied to the field of metallurgical technology. Refer to the appendix Figure 1 , the method is the same as the method in Example 1. Among them, in step 1, the main components of the copper-cobalt sulfide ore are Cu: 0.67 wt%, Co: 0.26 wt%, S: 1.53 wt%, and the main components of the copper-cobalt oxide ore are Cu: 0.65 wt%, Co: 0.27 wt%; in step 2, the stacking mass ratio of the copper-cobalt oxide ore and the copper-cobalt sulfide ore is 0.23:1.

[0052] Example 3 Example 3 of this application proposes a method for heap leaching treatment of copper-cobalt ore with high efficiency utilization, which is applied to the field of metallurgical technology. Refer to the attached Figure 1 , the method is the same as the method in Example 1. Among them, in step 1, the main components of the copper-cobalt sulfide ore are Cu: 1.05 wt%, Co: 0.18 wt%, S: 0.98 wt%, and the main components of the copper-cobalt oxide ore are Cu: 0.69 wt%, Co: 0.17 wt%; in step 2, the stacking mass ratio of the copper-cobalt oxide ore and the copper-cobalt sulfide ore is 0.36:1.

[0053] Finally, after the spraying in this application is completed, in Example 1, the leaching rates of copper and cobalt during the heap leaching treatment are measured to be 89.46% and 75.43% respectively; in Example 2, the leaching rates of copper and cobalt during the heap leaching treatment are measured to be 89.35% and 74.52% respectively; in Example 3, the leaching rates of copper and cobalt during the heap leaching treatment are measured to be 89.29% and 75.67% respectively; the comparative example is to continue to use a single fixed spraying flow rate in the existing process as , other parameters are the same as those in Example 1. After the spraying is completed, the leaching rates of copper and cobalt during the heap leaching treatment are measured to be 83.66% and 71.13% respectively.

[0054] The flowcharts and block diagrams in the accompanying drawings show the possible architectures, functions, and operations of the systems, methods, and computer program products according to the embodiments of this application. In this regard, each block in the flowchart or block diagram may represent a module, a program segment, or a part of code, and the module, program segment, or part of code contains one or more executable instructions for implementing the specified logical function. In some alternative implementations, the functions marked in the block may occur in a different order than that marked in the accompanying drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in the reverse order, which may depend on the functions involved. In the descriptions corresponding to the flowcharts and block diagrams in the accompanying drawings, the operations or steps corresponding to different blocks may also occur in a different order than that disclosed in the description. Sometimes, there is no specific order between different operations or steps. For example, two consecutive operations or steps may actually be executed substantially in parallel, and they may sometimes be executed in the reverse order, which may depend on the functions involved. Each block in the block diagram and / or flowchart, as well as the combination of blocks in the block diagram and / or flowchart, can be implemented by a dedicated hardware-based system for performing the specified functions or actions, or can be implemented by a combination of dedicated hardware and computer instructions.

[0055] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the various embodiments of the present application, and should all be included within the protection scope of the present application.

Claims

1. A method for heap leaching treatment of copper-cobalt ore with high efficiency utilization, characterized in that The method includes: Crushing copper-cobalt sulfide ore and copper-cobalt oxide ore separately; piling up the crushed copper-cobalt sulfide ore and copper-cobalt oxide ore; adding a solution of Acidithiobacillus ferrooxidans to sulfuric acid solution as a spraying liquid, and performing heap leaching treatment on the piled copper-cobalt ore through a spraying device; Collecting the temperature and humidity of the spraying environment, the spraying flow rate of the spraying device, and the pH value of the heap leaching solution at each collection moment during the heap leaching treatment process; obtaining the evaporation interference degree at each collection moment based on the similarity degree of the changes between temperature and humidity in the preset time period before and at each collection moment, combined with the similarity degree of the changes between humidity and spraying flow rate; obtaining the acid-base imbalance degree at each collection moment based on the chaos degree and average change range of the pH value change of the heap leaching solution in the preset time period before and at each collection moment; obtaining the similarity of the changes between the evaporation interference degree and the acid-base imbalance degree at each collection moment and in the preset time period before, and forming the similarity change sequence at each collection moment with the similarities obtained at each collection moment and in the preset time period before, analyzing the change characteristics of the elements in the similarity change sequence, obtaining the trend continuity degree at each collection moment, multiplying it by the element mean value of the corresponding similarity change sequence, and obtaining the heap leaching interference persistence degree at each collection moment after normalization processing; adjusting the spraying flow rate according to the change characteristics of the heap leaching interference persistence degree to obtain the expected spraying flow rate at each collection moment, and using a PID controller to control the spraying flow rate of the spraying device; Performing extraction-electrowinning treatment on the obtained heap leaching solution to obtain cathode metallic copper, precipitate and raffinate; using the raffinate as a spraying liquid for spraying circulation, and performing neutralization treatment on the precipitate to recover metallic cobalt.

2. The heap leaching treatment method of copper-cobalt ore with high-efficiency utilization as claimed in claim 1, characterized in that The crushing treatment of the copper-cobalt sulfide ore and the copper-cobalt oxide ore is separately carried out until they are all crushed to P80 - 20mm.

3. The heap leaching treatment method for copper-cobalt ore with high efficiency utilization according to claim 2, wherein, The main components of the copper-cobalt sulfide ore are Cu: 0.67wt% - 1.05wt%, Co: 0.18wt% - 0.26wt%, S: 0.98wt% - 1.53wt%.

4. The heap leaching treatment method of copper cobalt ore with high efficiency utilization according to claim 2, characterized in that The main components of the copper-cobalt oxide ore are Cu: 0.65wt% - 0.72wt%, Co: 0.17wt% - 0.27wt%.

5. An efficient utilization method for heap leaching treatment of copper-cobalt ore as described in claim 1, characterized in that, The mass ratio of piling up the crushed copper-cobalt sulfide ore and copper-cobalt oxide ore is: 1:0.23 - 0.

36.

6. The heap leaching treatment method of copper-cobalt ore with high-efficiency utilization according to claim 1, characterized in that, The spraying cycle for the heap leaching treatment is 180 days.

7. An efficient utilization method for heap leaching treatment of copper-cobalt ore as described in claim 1, characterized in that, The process of obtaining the evaporation interference degree at each moment is as follows: Taking the sequence composed of temperature data at each collection moment and in the preset time period before as the temperature characteristic sequence at each collection moment. Correspondingly, obtaining the humidity characteristic sequence and the spraying flow rate characteristic sequence at each collection moment; For each collection moment, recording the similarity between the first-order difference sequence of the temperature characteristic sequence and the first-order difference sequence of the humidity characteristic sequence as the first similarity; recording the similarity between the first-order difference sequence of the humidity characteristic sequence and the first-order difference sequence of the spraying flow rate characteristic sequence as the second similarity; Calculating the evaporation interference degree at each collection moment during the spraying process according to the first similarity and the second similarity, wherein the evaporation interference degree is positively correlated with the first similarity and negatively correlated with the second similarity.

8. The heap leaching treatment method of copper-cobalt ore with high efficient utilization according to claim 1, characterized in that, Obtaining the degree of acid-base imbalance at each collection moment includes: Taking the sequence composed of the pH values at each collection moment and in the preset time period before as the pH value characteristic sequence at each collection moment; For the first-order difference sequence of the pH value characteristic sequence, taking the normalized result of the positive fusion of the element absolute value mean and the information entropy of the elements as the degree of acid-base imbalance at each collection moment.

9. The heap leaching treatment method for efficiently utilizing copper-cobalt ore as described in claim 1, characterized in that, The specific method for obtaining the trend continuity at each collection moment is as follows: Statistical position serial numbers of elements that are positive in the first-order difference sequence of the similarity change sequence; According to the continuity of the position numbers of all positive numbers in the first-order difference sequence and the proportion of positive numbers, calculate the trend continuity at each acquisition moment during the spraying process. The specific formula is as follows: ; In the formula, is the trend continuity at the j-th acquisition moment during the spraying process, is the ratio of the number of positive elements to the total number of elements in the first-order difference sequence of the similarity change sequence at the j-th acquisition moment, is the exponential function with the natural constant as the base, 、 are respectively the position number of the s-th positive element and the position number of the (s - 1)-th positive element in the first-order difference sequence of the similarity change sequence at the j-th acquisition moment, is the total number of positive elements in the first-order difference sequence of the similarity change sequence at the j-th acquisition moment.

10. A method for heap leaching treatment of copper-cobalt ore with high efficiency utilization as described in claim 1, characterized in that, The specific method for obtaining the expected spray flow rate at each collection moment is as follows: Calculating the difference between the heap leaching interference persistence at each collection moment and that at the previous collection moment; calculating the sum of 1 and the difference, and taking the product of the obtained sum and the expected spray flow rate at the previous collection moment of each collection moment as the expected spray flow rate at each collection moment.

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