An efficient utilization method for heap leaching treatment of copper-cobalt ore

Abstract

This application relates to the field of metallurgical technology, and specifically relates to a method for heap leaching treatment of copper-cobalt ore with high efficiency utilization. The method includes: after respectively crushing sulfide copper-cobalt ore and oxide copper-cobalt ore, building a heap; adding a solution of Acidithiobacillus ferrooxidans to sulfuric acid solution as a spraying liquid, and performing heap leaching treatment on the copper-cobalt ore after building the heap through a spraying device. During the heap leaching treatment process, according to the changes in ambient temperature and humidity and the change in the pH value of the heap leaching solution, controlling 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, performing neutralization treatment on the precipitate, and recovering metallic cobalt. This application aims to accurately control and adjust the spraying flow rate of the spraying device to improve the leaching effect of copper and cobalt metals in copper-cobalt ore.

Description

Technical Field

[0001] This application relates to the field of metallurgical technology, and specifically 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 ore with relatively low copper and cobalt contents is continuously produced. Most of the existing processes are to carry out heap leaching treatment on the low-grade copper-cobalt ore to improve the recovery rate of copper and cobalt metals in the copper-cobalt ore, so as to achieve the high-efficiency utilization of the low-grade copper-cobalt ore. At the same time, the current heap leaching process is to add a solution of Acidithiobacillus ferrooxidans to the 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 of environmental temperature and humidity factors during the spraying process is relatively complex. The existing process does not fully consider the interference 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 the copper and cobalt metals in the copper-cobalt ore cannot be efficiently utilized. 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:

[0006] Carry out crushing treatment on copper sulfide cobalt ore and copper oxide cobalt ore respectively; build a heap for the crushed copper sulfide cobalt ore and copper oxide cobalt ore; add a solution of Acidithiobacillus ferrooxidans to the sulfuric acid solution as a spraying liquid, and carry out heap leaching treatment on the heap-built copper-cobalt ore through a spraying device;

[0007] 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 of the changes between temperature and humidity during each collection moment and the previous preset time period, combined with the similarity of the changes between humidity and spraying flow rate, obtain the evaporation interference degree at each collection moment; based on the degree of chaos 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 by 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 to 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; 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 collection moment, and use a PID controller to control the spraying flow rate of the spraying device;

[0008] 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, perform neutralization treatment on the precipitate, and recover metallic cobalt.

[0009] Preferably, the copper-cobalt sulfide ore and the copper-cobalt oxide ore are respectively crushed to P80 - 20 mm.

[0010] 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%.

[0011] 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%.

[0012] 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.

[0013] Preferably, the spraying cycle for the heap leaching treatment is 180 days.

[0014] Preferably, the process of obtaining the evaporation interference degree at each moment is as follows:

[0015] 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;

[0016] 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.

[0017] 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.

[0018] Preferably, obtaining the acid-base imbalance degree at each acquisition moment includes:

[0019] Taking the sequence composed of the pH values at each acquisition moment and the previous preset time period as the pH value feature sequence at each acquisition moment;

[0020] For the first-order difference sequence of the pH value feature sequence, taking the normalized 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.

[0021] Preferably, obtaining the trend continuity degree at each acquisition moment is specifically:

[0022] Statistically count the position serial numbers of the elements that are positive in the first-order difference sequence of the similarity change sequence;

[0023] 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: ; In the formula, is the trend continuity degree 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.

[0024] Preferably, obtaining the expected spray flow rate at each acquisition moment is specifically:

[0025] Calculate the difference between the heap leaching interference persistence degree at each acquisition moment and that of 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 of the previous acquisition moment of each acquisition moment as the expected spray flow rate at each acquisition moment.

[0026] The present application has at least the following beneficial effects:

[0027] (1) By analyzing the interference effects of environmental temperature and humidity factors during the spraying process, and based on the variation relationship between temperature, humidity, and spraying flow rate in the spraying environment, the evaporation interference degree during the spraying process is obtained. The evaporation interference degree can reflect the complexity of controlling the spraying flow rate of the spraying device, which is beneficial to accurately controlling and adjusting the spraying flow rate of the spraying device subsequently, thereby improving the leaching effect of copper and cobalt metals in copper-cobalt ore.

[0028] (2) Based on the evaporation interference degree during the spraying process and combined with the acid-base imbalance characteristics of copper-cobalt ore during the spraying process, the correlation degree between the evaporation interference characteristics and the acid-base imbalance characteristics showing an upward trend of change within a local time is analyzed more accurately. Further, the persistent influence characteristics of evaporation interference in the spraying environment on the heap leaching of copper-cobalt ore can be more accurately extracted, which can be used to reduce the persistent influence of evaporation interference in the spraying environment on the heap leaching of copper-cobalt ore subsequently and improve the spraying effect on copper-cobalt ore.

[0029] (3) The present application fully considers the persistent influence characteristics of evaporation interference in the spraying environment on the heap leaching of copper-cobalt ore, accurately controls and adjusts the spraying flow rate of the spraying device, realizes more precise control of the spraying flow rate during the heap leaching process of copper-cobalt ore. At the same time, it improves the leaching effect of copper and cobalt metals in copper-cobalt ore and reduces the content of impurities leached from copper-cobalt ore, realizing the efficient utilization of low-grade copper-cobalt ore. Description of the Drawings

[0030] Figure 1 It is a flowchart of a method for heap leaching treatment of copper-cobalt ore with high efficiency provided by the present application;

[0031] Figure 2 It is a flowchart for controlling the spraying flow rate of the spraying device provided by the present application. Detailed Embodiments

[0032] In the description of the embodiments of the present application, words such as "exemplary", "or", "for example", etc. are used to indicate examples, illustrations, or explanations. Any embodiment or design solution described as "exemplary" or "for example" in the embodiments of the present application should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Exactly speaking, using words such as "exemplary", "or", "for example", etc. aims to present relevant concepts in a specific manner.

[0033] 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. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0034] In addition, 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 the methods 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.

[0035] 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.

[0036] Embodiment 1

[0037] Embodiment 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:

[0038] Step 1, raw material crushing: The main components of the copper-cobalt sulfide ore are Cu: 1.03 wt%, Co: 0.25 wt%, S: 1.53 wt%; the main components of the copper-cobalt oxide ore are Cu: 0.72 wt%, Co: 0.27 wt%. Subsequently, the copper-cobalt sulfide ore and the copper-cobalt oxide ore are respectively crushed to P80 - 20 mm to obtain the crushed copper-cobalt sulfide ore and copper-cobalt oxide ore.

[0039] Step 2, heap building: The crushed copper-cobalt sulfide ore and copper-cobalt oxide ore are heaped by an alternating feeding method, and the mass ratio of the copper-cobalt oxide ore to the copper-cobalt sulfide ore for heap building is 0.30:1 to obtain the heaped copper-cobalt ore.

[0040] Step 3, heap leaching treatment: A solution of acidophilic Thiobacillus ferrooxidans is added to the sulfuric acid solution as the spraying liquid, and this solution is sprayed onto the heaped 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.

[0041] 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.

[0042] During the process of spray heap leaching of the stacked copper-cobalt ore, a temperature and humidity sensor, a flow sensor, and a pH sensor are used to collect the actual temperature and humidity in the heap leaching environment of the copper-cobalt ore, the actual spray flow rate of the spray device, and the actual pH value of the heap leaching solution respectively. The acquisition time interval for all sensors to collect data is set to 1 minute, and the implementer can adaptively set it according to the actual situation.

[0043] Furthermore, in order to eliminate the data dimensions between different parameter data and facilitate the subsequent accurate analysis of the interference effect of environmental temperature and humidity factors on the spray effect during the spraying process, the actual temperature and humidity, the actual spray flow rate of the spray device, and the actual pH value of the heap leaching solution within one hour before each acquisition moment 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, spray flow rate characteristic sequence, and pH value characteristic sequence at each acquisition moment during the spraying process.

[0044] Step 302, based on the similarity degree of the changes between temperature and humidity at each acquisition moment and in the previous preset time period, combined with the similarity degree of the changes between humidity and spray flow rate, obtain the evaporation interference degree at each acquisition moment; based on the degree of chaos and average change amplitude of the pH value change of the heap leaching solution at each acquisition moment and in the previous preset time period, obtain the acid-base imbalance degree at each acquisition moment.

[0045] During the process of heap leaching the stacked copper-cobalt ore, the interference effect of environmental temperature and humidity factors during the spraying process is relatively complex. For example, environmental temperature and humidity factors will affect the evaporation of the spray 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 spray device usually sets a single fixed spray 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 spray flow rate of the spray 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 spray flow rate of the spray device and improve the leaching effect of copper and cobalt metals in the copper-cobalt ore.

[0046] In order to analyze the influence of environmental interference on the heap leaching treatment at different sampling times, the first-order difference sequences of the temperature characteristic sequence, humidity characteristic sequence, and spray flow characteristic sequence are calculated respectively. The first-order difference sequence can reflect the changes in temperature, humidity, and spray flow in the actual environment of the heap leaching treatment. If the similarity of temperature and humidity changes within a certain period is higher than the similarity between humidity and spray flow, it can better reflect the evaporation phenomenon of the spray liquid during the spraying process. At this time, the complexity of controlling the spray flow of the spraying device is higher, and more accurate control and adjustment of the spray flow of the spraying device are required to improve the leaching effect of copper and cobalt metals in copper-cobalt ore.

[0047] Through the above analysis, calculate the absolute value of the similarity between the first-order difference sequence of the temperature characteristic sequence and the first-order difference sequence of the humidity characteristic 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 characteristic sequence and the first-order difference sequence of the spray flow characteristic 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.

[0048] In this embodiment, the formula form of the evaporation interference degree is specifically: ; 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, and it is taken within a small data range (0.001, 0.005). In this embodiment, the value of the error parameter is 0.005.

[0049] It should be understood that the evaporation interference degree reflects the evaporation effect under the influence of environmental temperature during the spraying process of copper-cobalt ore. The greater the evaporation interference degree, the more serious the evaporation phenomenon of the spray liquid during the spraying process, which will affect the leaching effect of copper and cobalt metals in copper-cobalt ore. Therefore, it is necessary to accurately control and adjust the spray flow of the spraying device.

[0050] Meanwhile, if the change in the acid-base balance of the heap leaching solution during the collection time 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. To analyze the acid-base balance during the spraying process at different collection times, calculate the first-order difference sequence of the pH value characteristic sequence, and calculate the complexity of all elements within this first-order difference sequence. The measurement method of complexity 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 more likely it is to cause acid-base imbalance in the copper-cobalt ore during the spraying process. Moreover, the first-order difference sequence of the pH value characteristic 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.

[0051] Therefore, calculate the absolute value mean of all elements within the first-order difference sequence of the pH value characteristic sequence, and record the exponential normalization result of the product of the absolute value mean and the permutation entropy as the acid-base imbalance degree at each collection time 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 characteristic, the less conducive it is to the leaching effect of copper and cobalt metals in the copper-cobalt ore.

[0052] Step 303: Obtain the similarity between the evaporation interference degree and the acid-base imbalance degree at each collection time and during the previous preset time period, and form a similarity change sequence for each collection time with the similarities obtained at each collection time and during the previous preset time period. Analyze the change characteristics of the elements in the similarity change sequence to obtain the trend continuity at each collection time, and multiply it by the element mean of the corresponding similarity change sequence. After normalization, obtain the heap leaching interference persistence at each collection time.

[0053] 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 the evaporation interference degree and the acid-base imbalance degree in the previous hour at each collection time in chronological order are respectively recorded as the evaporation interference sequence and the acid-base imbalance sequence at each collection time, and the covariance method is used to calculate the correlation degree between the evaporation interference sequence and the acid-base imbalance sequence at each collection time. 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 less conducive it is to maintaining 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.

[0054] Generally, 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, it indicates that the impact of evaporation interference on the heap leaching effect in the spraying environment 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.

[0055] Further, arrange the correlation degrees corresponding to all collection times within one hour before each collection time in chronological order, denoted as the similarity change sequence of each collection time, calculate the first-order difference sequence of the similarity change sequence, and count the position numbers of the elements that are positive within the first-order difference sequence. For example, the 2nd, 7th, and 11th elements within the first-order difference sequence are all positive, and their position numbers are 2, 7, and 11 respectively.

[0056] Through the above analysis, according to the continuity of the position numbers of all positive numbers within the first-order difference sequence and the proportion of positive numbers, calculate the trend continuity degree of each collection time during the spraying process: ; where is the trend continuity degree of the jth collection time during the spraying process, is the ratio of the number of positive elements to the total number of elements within the first-order difference sequence of the similarity change sequence of the jth collection time, is the exponential function with the natural constant as the base, 、 are respectively the position numbers of the s-th positive element and the (s - 1)-th positive element within the first-order difference sequence of the similarity change sequence of the jth collection time, is the total number of positive elements within the first-order difference sequence of the similarity change sequence of the jth collection time.

[0057] It should be understood that the trend continuity degree reflects the continuity of the correlation degree in an upward trend change 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 the copper-cobalt ore.

[0058] 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 sequence at each acquisition moment during the spraying process, and denote the exponential normalization result of the product of this mean value and the trend continuity as the heap leaching interference persistence at each acquisition moment during the spraying process. The heap leaching interference persistence reflects the characteristic of the persistent impact of evaporation interference on the heap leaching of copper-cobalt ore. The greater the characteristic of the persistent impact, 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.

[0059] Step 304, adjust the spraying flow rate according to the change characteristics of the heap leaching interference persistence, 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.

[0060] Through the constructed heap leaching interference persistence above, the persistent impact of heap leaching interference during the heap leaching treatment of copper-cobalt ore in the spraying process is monitored in real time. If the heap leaching interference persistence at the current acquisition moment increases, 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; on the contrary, if the heap leaching interference persistence at the current acquisition moment decreases, it indicates that the impact of the evaporation of the spraying liquid on the heap leaching effect is smaller. In order to reduce the content of impurities leached from copper-cobalt ore, the spraying flow rate of the spraying device should be appropriately reduced at this time.

[0061] Through the above analysis, calculate the expected spraying flow rate at the current acquisition moment during the spraying process: ; where is the expected spraying flow rate at the current acquisition moment during the spraying process, is the expected spraying 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.

[0062] Increase the spraying flow rate when the heap leaching interference persistence increases, and decrease the spraying flow rate when the heap leaching interference persistence decreases, which can more accurately control the spraying 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, so as to realize the efficient utilization of low-grade copper-cobalt ore.

[0063] It should be noted that since the spraying 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 spraying flow rate is adjusted in this application one hour after the spraying treatment.

[0064] Furthermore, a PID controller is used to more accurately control the spraying flow rate of the spraying device. The desired spraying flow rate and the actual spraying flow rate at the current acquisition moment are input into the PID controller. The PID controller calculates the error between the desired spraying flow rate and the actual spraying flow rate, and outputs a control signal according to the magnitude of the error. Furthermore, the control signal output by the PID controller is transmitted to the spraying device, so that the actual spraying flow rate in the spraying device continuously approaches the desired spraying flow rate, realizing accurate control and adjustment of the spraying flow rate of the spraying device.

[0065] Among them, the flow chart for controlling the spraying flow rate of the spraying device is as Figure 2 shown.

[0066] Example 2

[0067] Example 2 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 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 mass ratio of the copper-cobalt oxide ore to the copper-cobalt sulfide ore for stacking is 0.23:1.

[0068] Example 3

[0069] 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. Referring 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: 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 mass ratio of the copper-cobalt oxide ore to the copper-cobalt sulfide ore for stacking is 0.36:1.

[0070] Finally, after the spraying in this application is completed, the leaching rates of copper and cobalt in the heap leaching process measured in Example 1 are 89.46% and 75.43% respectively; the leaching rates of copper and cobalt in the heap leaching process measured in Example 2 are 89.35% and 74.52% respectively; the leaching rates of copper and cobalt in the heap leaching process measured in Example 3 are 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 , with other parameters being the same as those in Example 1. After the spraying is completed, the leaching rates of copper and cobalt in the heap leaching process are measured to be 83.66% and 71.13% respectively.

[0071] 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 blocks 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.

[0072] The above embodiments are only used to illustrate the technical solutions of this application, rather than to limit them; although this 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 recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of this application, and should all be included in the protection scope of this 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 respectively; 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 change between temperature and humidity in the preset time period before and at each collection moment, combined with the similarity degree of the change between humidity and spraying flow rate; obtaining the acid-base imbalance degree at each collection moment based on the chaos degree and average change amplitude 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 change between the evaporation interference degree and the acid-base imbalance degree at each collection moment and the preset time period before, and forming a similarity change sequence at each collection moment with the similarities obtained at each collection moment and 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 for efficiently utilizing copper-cobalt ore as described in claim 1, characterized in that, The crushing treatment of the copper cobalt sulfide ore and the copper cobalt oxide ore respectively is carried out until they are all crushed to P80-20mm.

3. The heap leaching treatment method for efficiently utilizing copper-cobalt ore as described in claim 2, characterized in that, 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 for efficiently utilizing copper-cobalt ore according to claim 2, wherein 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 for copper-cobalt ore with efficient utilization according to claim 1, characterized in that, The spraying cycle of 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: Taking the sequence composed of temperature data at each collection moment and 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, the similarity between the first-order difference sequence of the temperature characteristic sequence and the first-order difference sequence of the humidity characteristic sequence is denoted as the first similarity; 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 is denoted as the second similarity; According to the first similarity and the second similarity, calculating the evaporation interference degree at each collection moment during the spraying process, wherein the evaporation interference degree is positively correlated with the first similarity and negatively correlated with the second similarity.

8. An efficient utilization method for heap leaching treatment of copper-cobalt ore as described in claim 1, characterized in that, Obtaining the degree of acid-base imbalance 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 characteristic sequence at each acquisition moment; For the first-order difference sequence of the pH value characteristic sequence, taking the normalized result of the positive fusion of the mean value of the absolute values of the elements and the information entropy of the elements as the degree of acid-base imbalance at each acquisition moment.

9. An efficient utilization method for heap leaching treatment of copper-cobalt ore as described in claim 1, characterized in that, The specific method for obtaining the trend continuity degree at each acquisition moment is as follows: Counting 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 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, and are respectively the position serial number of the s-th positive element and the position serial 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. 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 expected spray flow rate at each acquisition moment is as follows: Calculating the difference between the heap leaching interference persistence degree at each acquisition moment and that at the previous acquisition moment; calculating the sum value of 1 and the difference, and taking 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.

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