Nickel-cobalt ion extraction visual contrast detection method and extraction liquid detection device

Abstract

The invention discloses a nickel-cobalt ion extraction visual contrast detection method and an extract liquid detection device, the detection method comprises the following steps: a sampling pump pumps an extract liquid in an extraction tank into a sampling pipeline, a concentration sensor of the sampling pipeline obtains the total concentration of the extracted extract liquid, and the concentration information is transmitted to a terminal; the visual detection camera adjusts the exposure time according to the total concentration of the extracted extraction liquid, photographs and samples the extracted extraction liquid in the sampling pipeline, and then transmits a photographed and sampled picture to the terminal; the color distinguishing module performs color value analysis and decomposition on the RGB color of the extracted extraction liquid picture; and comparing the RGB value of the picture of the extracted extraction liquid with the RGB value of the standard sample of the nickel-cobalt mixed solution under different concentrations to obtain the concentration value of the nickel-cobalt ions in the extracted extraction liquid. According to the detection method provided by the invention, the extraction degree can be accurately and timely fed back, the continuity of the production process is ensured, and the extraction efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of extraction processing, and in particular to a visual contrast detection method for nickel-cobalt ion extraction and an extraction liquid detection device. BACKGROUND

[0002] With the rapid development of the new energy industry, the demand for efficient separation and purification of nickel and cobalt is increasingly urgent. In industry, multi-stage extraction of nickel and cobalt ions is often carried out in extraction tanks. However, in the existing process, manual sampling is usually required to detect the nickel and cobalt ion content of the raffinate of each stage of extraction to determine the extraction degree. This not only is cumbersome and inefficient, but also is prone to errors in manual detection, affecting the separation effect.

[0003] CN202111651877.3 discloses a synergistic system for nickel-cobalt co-extraction and a co-extraction method. Although this method can achieve efficient separation of nickel-cobalt ions and impurity ions such as zinc and manganese, it still relies on traditional detection methods to determine the extraction process, which cannot accurately and timely feedback the extraction degree, resulting in poor coherence of the overall production process and low extraction efficiency. SUMMARY

[0004] The purpose of the present application is to provide a visual contrast detection method for nickel-cobalt ion extraction and an extraction liquid detection device, which can accurately and timely feedback the extraction degree, ensure the coherence of the production process, and improve the extraction efficiency.

[0005] To achieve this purpose, the following technical solutions are adopted:

[0006] A visual contrast detection method for nickel-cobalt ion extraction is applied to an extraction liquid detection device for detecting the extraction degree. The method includes:

[0007] A sampling pump in the extraction liquid detection device draws the extraction liquid in the extraction tank into a sampling pipeline. A concentration sensor arranged in the sampling pipeline acquires the total concentration of the extracted extraction liquid and transmits the concentration information to a terminal.

[0008] A visual detection camera adjusts the exposure time according to the total concentration of the extracted extraction liquid and takes a picture of the extracted extraction liquid in the sampling pipeline. Then the picture is transmitted to the terminal.

[0009] A color resolution module in the terminal resolves and decomposes the RGB color of the extracted extraction liquid picture.

[0010] By comparing the RGB value of the extracted extraction liquid picture with the RGB value of the nickel-cobalt mixed solution standard sample at different concentrations, the concentration value of the nickel-cobalt ions in the extracted extraction liquid is obtained.

[0011] In some embodiments of the present invention, after comparing the RGB values ​​of the extracted liquid image with the RGB values ​​of nickel-cobalt mixed solution standard samples at different concentrations, the method further includes: if the concentration of nickel-cobalt ions in the extracted liquid meets the extraction requirements, a first pH sensor installed in the sampling pipeline captures the pH value of the extracted liquid in the extraction tank and transmits the pH value to the terminal, whereby the terminal verifies the concentration of nickel-cobalt ions and the pH value in the extracted liquid; if the concentration of nickel-cobalt ions in the extracted liquid does not meet the extraction requirements, the first pH sensor no longer captures the pH value of the extracted liquid in the extraction tank.

[0012] In some embodiments of the present invention, when the sampling pump extracts the extract, the sampling pump further includes shortening the sampling interval and increasing the sampling amount when the concentration sensor senses that the total concentration of the extracted extract is greater than the set maximum concentration; and extending the sampling interval and reducing the sampling amount when the concentration sensor senses that the total concentration of the extracted extract is less than the set minimum concentration.

[0013] In some embodiments of the present invention, when the sampling pump extracts the extractant, it further includes taking an additional sample when the process parameters of the extraction tank change.

[0014] In some embodiments of the present invention, the changes in the process parameters of the extraction tank include, but are not limited to, changes in the rotation speed of the stirrer installed in the extraction tank and changes in the flow rate of the extractant in the extraction tank.

[0015] In some embodiments of the present invention, when the second pH sensor in the extraction tank detects a sudden change in the pH value in the extraction tank, or when the pressure sensor in the sampling pipeline detects a sudden increase in the pressure value, an alarm signal is sent to the terminal.

[0016] The extract detection device employs the aforementioned nickel-cobalt ion extraction visual comparison detection method. The extract detection device includes:

[0017] Sampling pump;

[0018] An extraction tank is provided with a sampling pipe, the inlet and outlet ends of which are connected to the extraction tank. The sampling pump is located on the sampling pipe and is positioned close to the inlet end of the sampling pipe.

[0019] The sampling pipeline is also equipped with a visual inspection camera, a concentration sensor, a first pH sensor, and a pressure sensor, all of which are communicatively connected to the terminal. The visual inspection camera is located on the side of the sampling pump away from the liquid inlet end of the sampling pipeline. The extraction tank is equipped with a second pH sensor that is communicatively connected to the terminal.

[0020] In some embodiments of the present invention, the detection device further includes a light-shielding member having a light-shielding space, and the visual detection camera is located within the light-shielding space.

[0021] In some embodiments of the present invention, a liquid level sensor is also provided in the extraction tank, and a flow sensor is also provided on the sampling pipe. Both the liquid level sensor and the flow sensor are communicatively connected to the terminal.

[0022] In some embodiments of the present invention, at least the portion of the sampling pipe opposite to the visual inspection camera is configured as a transparent section, and the sampling pump is configured as a peristaltic pump.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The present invention provides a visual contrast detection method and extraction solution detection device for nickel-cobalt ion extraction. It utilizes a concentration sensor to quickly obtain the total concentration of the extraction solution, providing parameter support for the visual inspection camera. This allows the camera to adjust the exposure time based on differences in total concentration, avoiding problems such as dark images and unclear color features due to excessively low concentration, or overexposure and color distortion due to excessively high concentration. This ensures that the captured images of the extraction solution accurately reflect its color state, thereby improving the accuracy of subsequent acquisition of nickel-cobalt ion concentration values ​​in the extracted solution. The terminal color resolution module accurately analyzes the RGB values ​​of the captured images and directly compares them with the RGB values ​​of nickel-cobalt mixed solution standards at different concentrations. This not only improves the accuracy of the comparison but also enhances the efficiency, thus improving the overall extraction efficiency. Furthermore, from the automatic extraction of the extraction solution by the sampling pump to the automatic acquisition of the total concentration by the concentration sensor and the automatic capture by the visual inspection camera, and the automatic color analysis and concentration calculation by the terminal, the entire process eliminates the need for manual sampling, operation of the detection equipment, or data transmission by personnel, ensuring continuity from extraction to detection and further improving efficiency. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of the present invention and these drawings without creative effort.

[0026] Figure 1 This is a simplified structural diagram of the extract detection device provided in an embodiment of the present invention.

[0027] In the picture;

[0028] 10. Concentration sensor; 20. First pH sensor; 30. Second pH sensor; 40. Pressure sensor; 50. Liquid level sensor; 60. Flow sensor;

[0029] 100. Sampling pump; 200. Extraction tank; 300. Sampling pipeline; 400. Visual inspection camera; 500. Light shield. Detailed Implementation

[0030] Before explaining any implementation of this application in detail, it should be understood that this application is not limited to its application to the structural details and component arrangements set forth in the following description or shown in the above drawings.

[0031] In this application, the terms "comprising," "including," "having," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0032] In this application, the term "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this application generally indicates that the preceding and following related objects have an "and / or" relationship.

[0033] In this application, the terms "connection," "combination," "coupling," and "installation" can refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without the need for an intermediary, while an indirect connection refers to two parts or components each being connected to at least one intermediary, with the connection achieved through the intermediary. Furthermore, "connection" and "coupling" are not limited to physical or mechanical connections or couplings, but can also include electrical connections or couplings.

[0034] In this application, those skilled in the art will understand that relative terms (e.g., “about,” “approximately,” “basically,” etc.) used in conjunction with quantities or conditions are to include the values ​​and have the meaning indicated by the context. For example, such relative terms include at least the degree of error associated with the measurement of a particular value, tolerances associated with the particular value due to manufacturing, assembly, use, etc. Such terms should also be considered as disclosing a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​that do not use relative terms should also be disclosed as specific values ​​with tolerances. Furthermore, “basically” when expressing relative angular relationships (e.g., substantially parallel, substantially perpendicular) may refer to a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) added to or subtracted from the indicated angle.

[0035] In this application, those skilled in the art will understand that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0036] In this application, the directional terms "upper," "lower," "left," "right," "front," and "rear" are used to describe the orientation and positional relationships shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should be understood that when an element is mentioned as being connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected through an intermediate element. It should also be understood that directional terms such as upper side, lower side, left side, right side, front side, and rear side not only represent positive orientation but can also be understood as lateral orientation. For example, "below" can include directly below, lower left, lower right, lower front, and lower rear.

[0037] Combination Figure 1As shown, this embodiment provides a visual comparison detection method for nickel-cobalt ion extraction. This method is applied to an extraction liquid detection device, which can accurately and timely provide feedback on the extraction degree, ensuring the continuity of the production process and improving extraction efficiency. Specifically, the method includes: a sampling pump 100 in the extraction liquid detection device pumps the extraction liquid from the extraction tank 200 into a sampling pipe 300; a concentration sensor 10 installed in the sampling pipe 300 acquires the total concentration of the extracted liquid and transmits the concentration information to a terminal; a visual inspection camera 400 adjusts the exposure time according to the total concentration of the extracted liquid and takes a picture of the extracted liquid in the sampling pipe 300, then transmits the picture to the terminal; a color resolution module in the terminal performs color value analysis and decomposition on the RGB colors of the acquired extracted liquid image; by comparing the RGB values ​​of the extracted liquid image with the RGB values ​​of nickel-cobalt mixed solution standard samples at different concentrations, the concentration value of nickel-cobalt ions in the extracted liquid is obtained.

[0038] The concentration sensor 10 quickly obtains the total concentration of the extract, providing parameter support for the visual inspection camera 400. This allows the camera to adjust the exposure time based on the concentration difference, avoiding issues such as dark images and unclear color features due to low concentration, or overexposure and color distortion due to high concentration. This ensures that the captured images of the extract accurately reflect its color state, thereby improving the accuracy of subsequent acquisition of nickel-cobalt ion concentration values ​​in the extracted solution. The terminal color resolution module accurately analyzes the RGB values ​​of the captured images and directly compares them with the RGB values ​​of nickel-cobalt mixed solution standards at different concentrations. This not only improves comparison accuracy but also efficiency, thus enhancing overall extraction efficiency. Furthermore, from the automatic extraction of the extract by the sampling pump 100 to the automatic acquisition of the total concentration by the concentration sensor 10, the automatic capture of images by the visual inspection camera 400, and the automatic color analysis and concentration calculation by the terminal, the entire process requires no manual sampling, operation of the testing equipment, or data transmission by personnel. This ensures continuity from extraction to detection, further improving efficiency.

[0039] Preferably, after comparing the RGB values ​​of the extracted liquid image with the RGB values ​​of nickel-cobalt mixed solution standard samples at different concentrations, the method further includes: if the concentration of nickel-cobalt ions in the extracted liquid meets the extraction requirements, the first pH sensor 20 installed in the sampling pipe 300 captures the pH value of the extracted liquid in the extraction tank 200 and transmits the pH value to the terminal, where the terminal verifies the concentration of nickel-cobalt ions in the extracted liquid and the pH value; if the concentration of nickel-cobalt ions in the extracted liquid does not meet the extraction requirements, the first pH sensor 20 no longer captures the pH value of the extracted liquid in the extraction tank 200.

[0040] Once the concentration of nickel-cobalt ions in the extract is found to be within acceptable limits, the pH value is acquired by the first pH sensor 20 and cross-validated with the concentration of nickel-cobalt ions in the extract. This further improves the accuracy of concentration detection and reduces the risk of errors from a single detection method. If the concentration of nickel-cobalt ions in the extract is found to be outside acceptable limits, the pH capture is stopped directly to avoid invalid detection operations, thereby saving detection time and improving detection efficiency, which in turn further enhances extraction efficiency.

[0041] Preferably, when the sampling pump 100 extracts the extract, it further includes the following steps: when the concentration sensor 10 senses that the total concentration of the extracted extract is greater than the set maximum concentration, the sampling pump 100 shortens the sampling interval and increases the sampling amount; when the concentration sensor 10 senses that the total concentration of the extracted extract is less than the set minimum concentration, the sampling pump 100 extends the sampling interval and reduces the sampling amount. In this way, when the concentration changes, the sampling interval can be shortened and the sampling amount increased when the extract concentration is too high, thereby monitoring concentration changes more intensively and comprehensively and keeping abreast of the extraction process; when the extract concentration is too low, the sampling interval can be extended and the sampling amount reduced, avoiding unnecessary frequent sampling and saving resources and detection time. This ensures that the concentration detection can accurately and timely provide feedback on the extraction degree, avoids detection delays or waste of detection resources due to improper sampling methods, ensures the continuity of the production process, and improves overall extraction efficiency. For example, when the total nickel-cobalt concentration is greater than 5 g / L, the sampling volume is increased to 1 mL and the sampling interval is shortened to 2 minutes; when the total nickel-cobalt concentration is less than 5 g / L, the sampling volume is reduced to 0.3 mL and the sampling interval is extended to 5 minutes.

[0042] Furthermore, when sampling pump 100 extracts the extractant, it also includes taking an additional sample when the process parameters of extraction tank 200 change. When the process parameters of extraction tank 200 change, the concentration of the extractant is prone to sudden changes. By taking an additional sample, the concentration change of the extractant can be captured in a timely manner, and the impact of parameter adjustments on the extraction degree can be quickly obtained. This facilitates timely optimization of process parameters, ensures the continuity of the production process, and reduces the risk of ineffective extraction due to undetected sudden changes in extractant concentration. Specifically, changes in the process parameters of extraction tank 200 include, but are not limited to, changes in the rotation speed of the stirrer (not shown in the figure) installed in extraction tank 200, and changes in the flow rate of the extractant in extraction tank 200.

[0043] Furthermore, when the second pH sensor 30 in the extraction tank 200 detects a sudden change in the pH value within the extraction tank 200, or when the pressure sensor 40 in the sampling pipeline 300 detects a sudden increase in pressure, an alarm signal is sent to the terminal. When the second pH sensor 30 detects a sudden change in the pH value within the extraction tank 200, it indicates a possible overabundance of extractant in the extraction tank 200. When the pressure sensor 40 detects a sudden increase in pressure, it indicates a possible problem with the sampling pipeline 300. In both cases, after receiving the alarm signal, the terminal promptly issues an alarm message to remind staff to address the fault and minimize losses caused by the malfunction. The alarm message issued by the terminal can be a visual or audible alert; this embodiment does not specify a particular method.

[0044] This embodiment also provides an extract detection device, which adopts the above-mentioned nickel-cobalt ion extraction visual comparison detection method. The extract detection device includes a sampling pump 100 and an extraction tank 200. A sampling pipe 300 is provided on the extraction tank 200. The inlet and outlet ends of the sampling pipe 300 are both connected to the extraction tank 200. The sampling pump 100 is provided on the sampling pipe 300 and is located close to the inlet end of the sampling pipe 300. A visual inspection camera 400, a concentration sensor 10, a first pH sensor 20, and a pressure sensor 40, all of which are communicatively connected to a terminal, are also provided on the sampling pipe 300. The visual inspection camera 400 is located on the side of the sampling pump 100 away from the inlet end of the sampling pipe 300. A second pH sensor 30, which is communicatively connected to a terminal, is provided in the extraction tank 200.

[0045] This setup allows the concentration sensor 10 to quickly acquire the total concentration of the extract throughout the extraction process, providing parameter support for the visual inspection camera 400. This enables the camera to adjust the exposure time based on the total concentration differences, preventing issues such as dark images and unclear color features due to low concentration, or overexposure and color distortion due to high concentration. This ensures that the captured images of the extract accurately reflect its color state, thereby improving the accuracy of subsequent acquisition of nickel-cobalt ion concentration values ​​in the extracted solution. The terminal color resolution module accurately analyzes the RGB values ​​of the captured images and directly compares them with the RGB values ​​of nickel-cobalt mixed solution standards at different concentrations. This not only improves comparison accuracy but also efficiency, thus enhancing overall extraction efficiency. Furthermore, from the automatic extraction of the extract by the sampling pump 100 to the automatic acquisition of the total concentration by the concentration sensor 10, the automatic capture of images by the visual inspection camera 400, and the automatic color analysis and concentration calculation by the terminal, the entire process eliminates the need for manual sampling, operation of the testing equipment, or data transmission by personnel. This ensures continuity from extraction to detection, further improving efficiency. Furthermore, once the concentration of nickel-cobalt ions in the extract solution is found to be within acceptable limits, the pH value is acquired by the first pH sensor 20 and cross-validated with the concentration value of nickel-cobalt ions in the extract solution, further improving the accuracy of concentration detection and reducing the risk of errors from a single detection method. If the concentration of nickel-cobalt ions in the extract solution is found to be outside acceptable limits, pH capture is stopped directly to avoid invalid detection operations, thereby saving detection time and improving detection efficiency, which in turn improves extraction efficiency. When the second pH sensor 30 in the extraction tank 200 detects a sudden change in pH value, or when the pressure sensor 40 in the sampling pipeline 300 detects a sudden increase in pressure value, an alarm signal is sent to the terminal to remind staff to handle the fault in a timely manner and reduce losses caused by the fault.

[0046] Furthermore, the detection device also includes a light-shielding component 500, which has a light-shielding space within which the visual inspection camera 400 is located. The light-shielding component 500 provides a light-shielding space for the visual inspection camera 400, thereby preventing external light from interfering with the camera's image capture, ensuring the extract image has true and clear colors, improving the accuracy of RGB value resolution, and thus making concentration detection more precise and extraction degree feedback more reliable. This avoids process adjustment errors caused by detection deviations due to light interference. The light-shielding component 500 can be configured as an open-shaped housing with a removable cover at the open end. The interior of the housing serves as the light-shielding space. When the cover is removed, it facilitates the operator's adjustment of the relative position and shooting angle of the visual inspection camera 400. After adjustment, the cover is reinstalled in the housing to ensure the stability of light within the light-shielding space. In other embodiments, the light-shielding component 500 can also be configured as a light shield, not limited to this embodiment.

[0047] Preferably, a liquid level sensor 50 is also installed in the extraction tank 200 to monitor the liquid level in the extraction tank 200 in real time, and a flow sensor 60 is also installed on the sampling pipe 300 to monitor the flow rate changes in the sampling pipe 300 in real time. Both the liquid level sensor 50 and the flow sensor 60 are connected to the terminal for communication. This allows the terminal to promptly and comprehensively grasp the key parameters in the extraction process, reducing the risk of production process interruption or poor extraction effect due to abnormal parameters.

[0048] Furthermore, at least the portion of the sampling pipe 300 opposite to the visual inspection camera 400 is made transparent to allow the visual inspection camera 400 to clearly capture the color of the extracted liquid, thereby ensuring the accuracy of RGB value detection. The sampling pump 100 is set as a peristaltic pump, which can flexibly control the sampling volume and sampling speed while adapting to the sampling needs of different concentrations of extract. It also reduces the probability of contaminating the extract during sampling, thereby improving detection reliability. In other embodiments, the sampling pump 100 can be adapted to diaphragm metering pumps, magnetically driven pumps, plunger metering pumps, etc., according to actual needs, and is not limited to the peristaltic pump in this embodiment.

[0049] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A visual contrast detection method for nickel-cobalt ion extraction, applied to an extractant detection device, for detecting the degree of extraction, characterized in that... The nickel-cobalt ion extraction visual contrast detection method includes: The sampling pump (100) in the extraction liquid detection device draws the extract from the extraction tank (200) into the sampling pipe (300). The concentration sensor (10) installed in the sampling pipe (300) obtains the total concentration of the extracted extract and transmits the concentration information to the terminal. The visual inspection camera (400) adjusts the exposure time according to the total concentration of the extracted liquid and takes pictures of the extracted liquid in the sampling pipe (300), and then transmits the pictures to the terminal. The color resolution module in the terminal performs color value analysis and decomposition on the RGB colors of the extracted liquid image. The concentration of nickel and cobalt ions in the extracted solution was obtained by comparing the RGB values ​​of the extracted solution image with the RGB values ​​of nickel-cobalt mixed solution standard samples at different concentrations.

2. The nickel-cobalt ion extraction visual contrast detection method according to claim 1, characterized in that, After comparing the RGB values ​​of the extracted liquid image with the RGB values ​​of nickel-cobalt mixed solution standard samples at different concentrations, the process further includes: if the concentration of nickel-cobalt ions in the extracted liquid meets the extraction requirements, the first pH sensor (20) installed in the sampling pipe (300) captures the pH value of the extracted liquid in the extraction tank (200) and transmits the pH value to the terminal, whereby the terminal verifies the concentration of nickel-cobalt ions in the extracted liquid and the pH value; if the concentration of nickel-cobalt ions in the extracted liquid does not meet the extraction requirements, the first pH sensor (20) no longer captures the pH value of the extracted liquid in the extraction tank (200).

3. The nickel-cobalt ion extraction visual contrast detection method according to claim 1, characterized in that, When the sampling pump (100) extracts the extract, it further includes the following steps: when the concentration sensor (10) senses that the total concentration of the extracted extract is greater than the set maximum concentration, the sampling pump (100) shortens the sampling interval and increases the sampling amount; when the concentration sensor (10) senses that the total concentration of the extracted extract is less than the set minimum concentration, the sampling pump (100) extends the sampling interval and reduces the sampling amount.

4. The nickel-cobalt ion extraction visual contrast detection method according to claim 3, characterized in that, When the sampling pump (100) extracts the extract, it also includes taking an additional sample when the process parameters of the extraction tank (200) change.

5. The nickel-cobalt ion extraction visual contrast detection method according to claim 4, characterized in that, Changes in the process parameters of the extraction tank (200) include, but are not limited to, changes in the rotation speed of the agitator installed in the extraction tank (200) and changes in the flow rate of the extractant in the extraction tank (200).

6. The nickel-cobalt ion extraction visual contrast detection method according to claim 1, characterized in that, When the second pH sensor (30) in the extraction tank (200) detects a sudden change in the pH value in the extraction tank (200), or when the pressure sensor (40) in the sampling pipe (300) detects a sudden increase in the pressure value, it sends an alarm signal to the terminal.

7. An extract detection device, employing the nickel-cobalt ion extraction visual comparison detection method according to any one of claims 1-6, characterized in that, The extract detection device includes: Sampling pump (100); An extraction tank (200) is provided with a sampling pipe (300), the inlet and outlet ends of the sampling pipe (300) are connected to the extraction tank (200), and the sampling pump (100) is provided on the sampling pipe (300) and is located near the inlet end of the sampling pipe (300). The sampling pipeline (300) is also equipped with a visual inspection camera (400), a concentration sensor (10), a first pH sensor (20), and a pressure sensor (40) that are all connected to the terminal. The visual inspection camera (400) is located on the side of the sampling pump (100) away from the liquid inlet end of the sampling pipeline (300). The extraction tank (200) is equipped with a second pH sensor (30) that is connected to the terminal.

8. The extract detection device according to claim 7, characterized in that, The detection device further includes a light-shielding component (500) having a light-shielding space, and the visual inspection camera (400) is located within the light-shielding space.

9. The extract detection device according to claim 7, characterized in that, The extraction tank (200) is also equipped with a liquid level sensor (50), and the sampling pipe (300) is also equipped with a flow sensor (60). Both the liquid level sensor (50) and the flow sensor (60) are connected to the terminal for communication.

10. The extract detection device according to claim 7, characterized in that, The portion of the sampling conduit (300) at least opposite to the visual inspection camera (400) is set as a transparent section, and the sampling pump (100) is set as a peristaltic pump.

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