Tailing slag resourceful wastewater recovery treatment method and system

Abstract

The invention discloses a recycling treatment method and system for tailing slag recycling wastewater, and relates to the technical field of wastewater recycling treatment. The method comprises the following steps: acquiring a wastewater sample of the tailing slag recycling wastewater; performing sample analysis on the wastewater sample to obtain wastewater component information; selecting a wastewater treatment mode according to the wastewater component information; the treated wastewater to be discharged is detected again, and if no harmful substance is detected or the content of the harmful substance is lower than a specified content threshold value, the wastewater to be discharged is discharged; otherwise, the wastewater to be discharged is recycled and retreated. According to the method, the component information in the wastewater is obtained by detecting and analyzing the wastewater sample, then the corresponding wastewater treatment mode is selected according to the component information, and finally, whether the treated wastewater contains harmful substances or not is observed through re-detection, so that it is guaranteed that the tailing slag recycling wastewater can be treated to the maximum extent, and the treatment efficiency is improved. The wastewater discharge is effectively reduced, the environmental pollution is reduced, and meanwhile, the effective cyclic utilization of environmental resources is realized.

Description

Technical Field

[0001] The present invention belongs to the technical field of wastewater recycling and treatment, and particularly relates to a method and system for recycling and treating resource-based wastewater from tailings slag. Background Art

[0002] Tailings slag is the waste left after the processes of ore crushing, screening, ore dressing, etc., mainly composed of mineral debris, fine-grained minerals, flotation reagents, and moisture. During the storage of tailings slag, due to the presence of moisture and changes in the external environment, the tailings slag will release dissolved substances to form resource-based wastewater from tailings slag. These wastewaters usually contain a large amount of suspended solids, heavy metals, dissolved inorganic substances, toxic chemical substances, and other pollutants. Since the resource-based wastewater from tailings slag is directly discharged without treatment, it may cause serious pollution to water bodies, soil, and air. Its pollution not only affects the ecological environment but may also endanger human health. Therefore, appropriate wastewater treatment and recycling technologies need to be adopted. Summary of the Invention

[0003] The purpose of the present invention is to provide a method and system for recycling and treating resource-based wastewater from tailings slag, which can be achieved through the following technical solutions:

[0004] In the first aspect, an embodiment of the present application provides a method for recycling and treating resource-based wastewater from tailings slag, including the following steps:

[0005] Obtain a wastewater sample of the resource-based wastewater from tailings slag;

[0006] Conduct sample analysis on the wastewater sample to obtain wastewater composition information;

[0007] Select a wastewater treatment method according to the wastewater composition information;

[0008] Re-detect the treated wastewater to be discharged. If no harmful substances are detected, or the content of the harmful substances is lower than the specified content threshold, then discharge the wastewater to be discharged; otherwise, recycle and re-treat the wastewater to be discharged;

[0009] Among them, the harmful substances and the specified content threshold are determined according to the impact degree of the resource-based wastewater from tailings slag on the local environment.

[0010] Preferably, the conducting sample analysis on the wastewater sample includes:

[0011] Conduct solid-liquid detection on the wastewater sample to screen out solid particles and solid-free wastewater;

[0012] Conduct heavy metal detection on the solid-free wastewater to screen out heavy metal elements;

[0013] Detect acidic substances in the solid-free wastewater for screening out acidic substances;

[0014] Detect chemical substances in the solid-free wastewater for screening out toxic chemical substances;

[0015] Detect inorganic substances in the solid-free wastewater for screening out soluble inorganic substances and organic pollutants.

[0016] Preferably, the wastewater composition information includes solid particles, heavy metal elements, acidic substances, toxic chemical substances, soluble inorganic substances and organic pollutants.

[0017] Preferably, the solid-liquid detection of the wastewater sample includes:

[0018] Perform the first filtration on the wastewater sample by the filtration method to separate solid particles with large pore sizes;

[0019] Perform the second filtration on the wastewater sample by the sedimentation method to separate solid particles with medium pore sizes;

[0020] Perform the third filtration on the wastewater sample by the centrifugation method to separate solid particles with small pore sizes;

[0021] Quantitatively measure the concentration of solids in the wastewater sample after the separation of solid particles. If there are no solid particles in the wastewater sample, or the concentration of solid particles is lower than the preset concentration threshold, the solid-free wastewater is obtained;

[0022] Among them, the pore size of the solid particles is determined according to actual measurement.

[0023] Preferably, the heavy metal detection of the solid-free wastewater includes:

[0024] Detect the heavy metal concentration in the solid-free wastewater by the electrochemistry method. If the heavy metal concentration is low, use inductively coupled plasma mass spectrometry and enrichment separation-spectrophotometry for detection to screen out multiple heavy metal elements; if the heavy metal concentration is high, use inductively coupled plasma optical emission spectrometry for detection to screen out multiple heavy metal elements;

[0025] Also detect the solid-free wastewater by the vapor atomic absorption method to screen out volatile heavy metal elements

[0026] Analyze the heavy metal content in the solid-free wastewater according to the heavy metal detection results;

[0027] Among them, the high or low of the heavy metal concentration is determined according to the degree of influence of the heavy metal element on the environment.

[0028] Preferably, the detection of acidic substances in the solid-free wastewater includes:

[0029] Using the pH value determination method and acid-base titration method to determine that the solid-free wastewater contains acidic substances;

[0030] Using the acidity strength determination method to detect the strength of acidic substances in the solid-free wastewater and obtain the total amount of acidic components;

[0031] Using ion chromatography to separate and quantitatively analyze various acidic ions in the solid-free wastewater;

[0032] Using gas chromatography-mass spectrometry to detect and analyze volatile organic acids in the solid-free wastewater;

[0033] Using high performance liquid chromatography to detect and analyze soluble organic acids in the solid-free wastewater;

[0034] Using ultraviolet-visible light spectroscopy to detect and analyze acidic substances with ultraviolet absorption characteristics in the solid-free wastewater.

[0035] Preferably, the detection of chemical substances in the solid-free wastewater includes:

[0036] Using the ion selective electrode method to detect cyanide in the solid-free wastewater and obtain the cyanide content;

[0037] Using gas chromatography-mass spectrometry to detect flotation agents in the solid-free wastewater and obtain the type of flotation machine;

[0038] Using liquid chromatography-mass spectrometry to detect toxic substances in the solid-free wastewater and obtain the type and content of toxic substances.

[0039] Preferably, the detection of inorganic substances in the solid-free wastewater includes:

[0040] Using ion chromatography to detect soluble inorganic substances in the solid-free wastewater and obtain soluble inorganic ions and ion concentrations;

[0041] Using gas chromatography-mass spectrometry to detect organic pollutants in the solid-free wastewater and using the total organic carbon analysis method to detect the concentration of total organic carbon in the solid-free wastewater.

[0042] Preferably, the selection of wastewater treatment methods according to the wastewater component information includes:

[0043] If the wastewater component information contains solid particles, the solid precipitation method is used for treatment;

[0044] If heavy metal elements are contained in the wastewater composition information, a comprehensive treatment is carried out by integrating chemical precipitation method, ion exchange method and electro-deposition method;

[0045] If acidic substances are contained in the wastewater composition information, a neutralization method is used for acid-base neutralization treatment;

[0046] If toxic chemical substances are contained in the wastewater composition information, a comprehensive treatment is carried out by integrating advanced oxidation method and adsorption method;

[0047] If soluble inorganic substances are contained in the wastewater composition information, ion exchange method and reverse osmosis method are used for treatment;

[0048] If organic pollutants are contained in the wastewater composition information, adsorption method, oxidation method and chemical precipitation method are used for treatment.

[0049] In a second aspect, an embodiment of the present application provides a tailings slag resource-based wastewater recovery and treatment system, including:

[0050] A sample acquisition module: used to acquire a wastewater sample of the tailings slag resource-based wastewater;

[0051] A sample analysis module: used to perform sample analysis on the wastewater sample to obtain wastewater composition information;

[0052] A wastewater treatment module: used to select a wastewater treatment method according to the wastewater composition information;

[0053] A wastewater re-detection module: used to re-detect the wastewater to be discharged obtained after treatment. If no harmful substances are detected therein, or the content of the harmful substances is lower than the specified content threshold, the wastewater to be discharged is discharged; otherwise, the wastewater to be discharged is recycled and re-treated;

[0054] Wherein, the harmful substances and the specified content threshold are determined according to the impact degree of the tailings slag resource-based wastewater on the local environment.

[0055] The beneficial effects of the present invention are as follows: By detecting and analyzing the wastewater sample, the composition information in the wastewater is obtained. Then, according to the composition information, the corresponding wastewater treatment method is selected. Finally, by re-detecting, it is observed whether there are still harmful substances in the treated wastewater, so as to ensure that the tailings slag resource-based wastewater can be treated to the greatest extent, effectively reduce wastewater discharge, reduce environmental pollution, and at the same time realize the effective recycling of environmental resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] For better understanding and implementation, the technical solutions of the present application will be described in detail below with reference to the accompanying drawings.

[0057] Figure 1The flowchart of the steps of a method for recycling and treating wastewater from tailings slag provided by an embodiment of the present application;

[0058] Figure 2 The flowchart of the steps of wastewater sample analysis provided by an embodiment of the present application;

[0059] Figure 3 The flowchart of the steps of solid-liquid detection provided by an embodiment of the present application;

[0060] Figure 4 The structural schematic diagram of a system for recycling and treating wastewater from tailings slag provided by an embodiment of the present application. Detailed implementation manners

[0061] To further elaborate on the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, exemplary embodiments will be described in detail herein, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present application. On the contrary, they are merely examples of methods and systems consistent with some aspects of the present application as detailed in the appended claims.

[0062] The terms used in the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. The singular forms of "a", "the" and "said" used in the present application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to any or all possible combinations including one or more of the associated listed items.

[0063] The following will elaborate in detail on the specific implementation manners, features and effects of the present invention in conjunction with the accompanying drawings and preferred embodiments.

[0064] Embodiment 1

[0065] Please refer to Figure 1 , an embodiment of the present application provides a method for recycling and treating wastewater from tailings slag, including the following steps:

[0066] Obtain a wastewater sample of the wastewater from tailings slag;

[0067] Conduct sample analysis on the wastewater sample to obtain wastewater component information;

[0068] Select a wastewater treatment method according to the wastewater component information;

[0069] Redetect the wastewater to be discharged after treatment. If no harmful substances are detected therein, or the content of the harmful substances is lower than the specified content threshold, then discharge the wastewater to be discharged; otherwise, recycle and re-treat the wastewater to be discharged;

[0070] Among them, the harmful substances and the specified content threshold are determined according to the impact degree of the resource-based wastewater from tailings on the local environment.

[0071] Specifically, during the storage process of tailings, the presence of moisture and changes in the external environment will cause the tailings to release dissolved substances, thereby forming resource-based wastewater from tailings. These wastewaters usually contain a large amount of suspended solids, heavy metals, dissolved inorganic substances, toxic chemical substances, and other pollutants. Since the resource-based wastewater from tailings is directly discharged without treatment, it may cause serious pollution to water bodies, soil, and air. Its pollution not only affects the ecological environment but may also endanger human health. Therefore, this application conducts multi-faceted detection on the resource-based wastewater from tailings and selects appropriate recycling and treatment technologies according to the detection results, specifically including: first, obtaining a wastewater sample of the resource-based wastewater from tailings; then analyzing the wastewater sample to obtain wastewater composition information; then selecting a wastewater treatment method according to the wastewater composition information; finally, redetecting the wastewater to be discharged after treatment. If no harmful substances are detected therein, or the content of the harmful substances is lower than the specified content threshold, then discharge the wastewater to be discharged; otherwise, recycle and re-treat the wastewater to be discharged. It can be understood that the above-mentioned harmful substances and the specified content threshold can be determined according to the impact degree of the resource-based wastewater from tailings on the local environment, and the present embodiment does not specifically limit the content threshold.

[0072] For the above-mentioned harmful substances, it can include but is not limited to heavy metals, dissolved inorganic substances, toxic chemical substances, and acidic substances. The present embodiment does not limit the specific types. As long as the substances that affect the local environment and water and soil and will affect human health and cause it to lose its original function are the harmful substances described in this application.

[0073] This application obtains the composition information in the wastewater by detecting and analyzing the wastewater sample, then selects the corresponding wastewater treatment method according to the composition information, and finally observes whether there are still harmful substances in the treated wastewater through re-detection, so as to ensure that the resource-based wastewater from tailings can be treated to the greatest extent, effectively reduce wastewater discharge, reduce environmental pollution, and at the same time realize the effective recycling of the environment such as water resources.

[0074] Such as Figure 2 shown, in an embodiment provided by this application, the sample analysis of the wastewater sample includes:

[0075] Perform solid-liquid detection on the wastewater sample to screen out solid particles and solid-free wastewater;

[0076] Perform heavy metal detection on the solid-free wastewater to screen out heavy metal elements;

[0077] Perform acidic substance detection on the solid-free wastewater to screen out acidic substances;

[0078] Perform chemical substance detection on the solid-free wastewater to screen out toxic chemical substances;

[0079] Perform inorganic substance detection on the solid-free wastewater to screen out soluble inorganic substances and organic pollutants.

[0080] Specifically, in this embodiment, the above five-fold detection is used to analyze the component information in the wastewater sample, which specifically includes: first, perform the first-fold solid-liquid detection to screen out solid particles, and then perform the second-fold heavy metal detection, the third-fold acidic substance detection, the fourth-fold chemical substance detection, and the fifth-fold inorganic substance detection on the solid-free wastewater, so as to obtain heavy metal elements, acidic substances, chemical agents, soluble inorganic substances, and organic pollutants. This embodiment provides data support for subsequent wastewater treatment by detecting the above components.

[0081] In an embodiment provided by the present application, the wastewater component information includes solid particles, heavy metal elements, acidic substances, toxic chemical substances, soluble inorganic substances, and organic pollutants.

[0082] Specifically, solid particles refer to suspended matter from tailings. A large amount of suspended matter can not only reduce the transparency of the water body and hinder sunlight from passing through the water surface, but also accumulate in the water body, block the water channel, and cause the habitat of aquatic organisms to deteriorate. In addition, the fine particulate matter in the long-term discharge of tailings wastewater will also affect the growth of aquatic plants; heavy metal elements, such as lead, cadmium, copper, zinc and other mineral elements, may dissolve in the water and constitute a source of pollution. Among them, lead (Pb): is toxic to the growth and reproduction of aquatic organisms, and long-term accumulation can enter the food chain , which ultimately endangers human health; Cadmium (Cd): It is toxic to aquatic organisms, especially fish and shellfish, and can accumulate and cause toxic effects; Copper (Cu): High concentrations of copper are toxic to aquatic plants and animals, interfering with the metabolism of organisms; Zinc (Zn): Although zinc is a trace element for plants and animals, excessive concentrations can affect aquatic ecosystems; Mercury (Hg): Mercury is extremely toxic and easily accumulates in water bodies and is transmitted through the food chain, which may cause serious harm to ecosystems and humans; Acidic substances refer to the substances produced by some tailings after reacting with water. Acidic wastewater is extremely harmful to organisms in water bodies. It can lead to acidification of water bodies and seriously damage aquatic ecosystems. The acidification of wastewater not only poisons aquatic organisms, but also affects the pH value of the soil, thereby affecting plant growth. Toxic chemicals refer to chemical agents used in the process of ore processing, such as cyanide and flotation agents. Cyanide will spread rapidly in water bodies and is extremely toxic to aquatic organisms. If flotation agents (such as xanthate, oil chemicals, etc.) enter the water body, they will also cause serious pollution. Some flotation agents are not easily degraded in water. , can have a long-term impact on aquatic ecological environment and water quality; soluble inorganic substances (such as sulfate, chloride, ammonia nitrogen, etc.) at high concentrations can cause salinization of water bodies, destroying ecological balance, and minerals dissolved in wastewater may be deposited at the bottom of the water body, affecting the survival of benthic organisms; organic pollutants refer to organic solvents or incompletely decomposed organic compounds used in the ore processing process that may be contained in tailings wastewater. These organic substances are difficult to degrade in water, which will cause eutrophication of water bodies and further cause water blooms (such as blue algae blooms). Heavy metals, acidic substances, toxic chemicals (such as cyanide and flotation agents), suspended matter, high concentrations of salts and inorganic substances in tailings resource wastewater are the main components that cause more serious impacts on the environment and water bodies. These components not only pose a threat to aquatic organisms, ecosystems and their diversity, but may also be transmitted through the food chain, ultimately causing potential harm to human health. Therefore, this embodiment detects and determines the components of tailings wastewater, thereby providing data support for the effective treatment and recycling of subsequent wastewater.

[0083] like Figure 3 As shown, in one embodiment provided in the present application, the solid-liquid detection of the wastewater sample includes:

[0084] The first - stage filtration of the wastewater sample is carried out by the filtration method to separate solid particles with large pore diameters;

[0085] The second - stage filtration of the wastewater sample is carried out by the sedimentation method to separate solid particles with medium pore diameters;

[0086] The third - stage filtration of the wastewater sample is carried out by the centrifugation method to separate solid particles with small pore diameters;

[0087] The concentration of solids in the wastewater sample after the separation of solid particles is quantitatively measured. If there are no solid particles in the wastewater sample or the concentration of solid particles is lower than the preset concentration threshold, the solid - free wastewater is obtained;

[0088] Among them, the pore size of the solid particles is determined according to actual measurement.

[0089] Specifically, in this application, for solid particles with large, medium, and small pore diameters respectively, the above - mentioned wastewater sample is subjected to triple filtration by the filtration method, sedimentation method, and centrifugation method, so as to separate solid particles with different pore sizes in the wastewater sample from the wastewater, thus ensuring that subsequent various detections are not interfered by solid particles and making the detection data more accurate. It can be understood that the pore size of the above - mentioned solid particles only facilitates the selection of corresponding separation methods in this embodiment and does not specifically limit the pore size of the particles. That is to say, the specific sizes of "large pore diameter, medium pore diameter, and small pore diameter" are not limited in this embodiment.

[0090] In an embodiment provided by this application, the heavy - metal detection of the solid - free wastewater includes:

[0091] The concentration of heavy metals in the solid - free wastewater is detected by the electrochemical method. If the heavy - metal concentration is low, the inductively coupled plasma mass spectrometry and enrichment separation - spectrophotometry are used for detection to screen out various heavy - metal elements; if the heavy - metal concentration is high, the inductively coupled plasma emission spectrometry is used for detection to screen out various heavy - metal elements;

[0092] The solid - free wastewater is also detected by the vapor atomic absorption method to screen out volatile heavy - metal elements

[0093] Analyze the heavy - metal content in the solid - free wastewater according to the heavy - metal detection results;

[0094] Among them, the high or low of the heavy - metal concentration is determined according to the degree of influence of the heavy - metal element on the environment.

[0095] Specifically, the electrochemical method utilizes the principle of electrochemical reactions to calculate the concentration of heavy metals through changes in current or potential; inductively coupled plasma mass spectrometry (ICP-MS) is a highly sensitive detection technique that can simultaneously detect multiple heavy metal elements and is suitable for low-concentration detection. It mainly ionizes the metal elements in the sample using a plasma source and detects the characteristic ions of each element through mass spectrometry analysis, thereby quantitatively analyzing the content of heavy metal elements. ICP-MS can simultaneously detect dozens of heavy metal elements and has extremely high sensitivity and resolution; inductively coupled plasma optical emission spectrometry (ICP-OES) can be used to detect various metal elements in wastewater and is particularly suitable for the analysis of heavy metals at higher concentrations. It excites the metal elements to emit light at specific wavelengths through a plasma, then measures the emission light intensity of the heavy metal elements in the sample, and calculates the element concentration using a standard curve; the enrichment separation-spectrophotometry method uses methods such as precipitation, extraction, or resin adsorption to enrich the heavy metal elements in the water sample, then adds an appropriate color reagent to form a colored complex with the heavy metal elements, and then measures the absorbance of the solution using a spectrophotometer. Finally, the metal concentration is analyzed through a standard curve. It is suitable for the detection of low-concentration metal elements and is easy to operate; for some volatile heavy metal elements (such as mercury, arsenic, etc.), the vapor generation atomic absorption spectrometry (VGA-AAS) is used for treatment. First, a vaporization device is used to convert heavy metal elements such as mercury and arsenic into a gaseous state, then the absorption spectrum of the gaseous metal is measured using an atomic absorption spectrometer, and finally the content of the heavy metal elements is determined according to the absorption spectrum. In this embodiment, the above-mentioned multiple methods are used to detect the heavy metal elements in the solid-free wastewater. The above methods can effectively screen and quantify the heavy metal elements in the wastewater, ensuring environmental safety and the accuracy of water quality monitoring.

[0096] In an embodiment provided by the present application, the detection of acidic substances in the solid-free wastewater includes:

[0097] Using the pH value determination method and the acid-base titration method to determine that there are acidic substances in the solid-free wastewater;

[0098] Using the acidity strength determination method to detect the strength of the acidic substances in the solid-free wastewater and obtain the total amount of acidic components;

[0099] Using ion chromatography to separate and quantitatively analyze various acidic ions in the solid-free wastewater;

[0100] Using gas chromatography-mass spectrometry to detect and analyze the volatile organic acids in the solid-free wastewater;

[0101] Using high-performance liquid chromatography to detect and analyze the soluble organic acids in the solid-free wastewater;

[0102] The ultraviolet-visible spectroscopy is used to detect and analyze the acidic substances with ultraviolet absorption characteristics in the solid-free wastewater.

[0103] Specifically, in this embodiment, methods such as pH value determination method, acid-base titration method, acidity strength determination method, ion chromatography method, etc. are used to effectively screen out the acidic substances in the wastewater and quantitatively analyze their concentrations to ensure that the wastewater discharge meets the environmental protection standards; methods such as gas chromatography-mass spectrometry, high performance liquid chromatography, and ultraviolet-visible spectroscopy are also used to analyze the specific acidic substances in the wastewater in detail, so as to accurately identify and quantify the acidic substances in the wastewater.

[0104] In an embodiment provided by the present application, the detection of chemical substances in the solid-free wastewater includes:

[0105] The ion selective electrode method is used to detect cyanide in the solid-free wastewater to obtain the cyanide content;

[0106] The gas chromatography-mass spectrometry is used to detect the flotation agent in the solid-free wastewater to obtain the type of flotation machine;

[0107] The liquid chromatography-mass spectrometry is used to detect toxic substances in the solid-free wastewater to obtain the types and contents of toxic substances.

[0108] Specifically, in this embodiment, by combining the above-mentioned multiple methods, the toxic chemical substances in the wastewater can be effectively screened and identified.

[0109] In an embodiment provided by the present application, the detection of inorganic substances in the solid-free wastewater includes:

[0110] The ion chromatography is used to detect the dissolved inorganic substances in the solid-free wastewater to obtain the dissolved inorganic ions and ion concentrations;

[0111] The gas chromatography-mass spectrometry is used to detect the organic pollutants in the solid-free wastewater, and the total organic carbon analysis method is used to detect the concentration of total organic carbon in the solid-free wastewater.

[0112] Specifically, in this embodiment, through comprehensive analysis by combining multiple methods, accurate screening and quantitative analysis of inorganic substances and organic pollutants in the water body are ensured. It can be understood that the total organic carbon (TOC) analysis method indirectly reflects the degree of organic matter pollution in the water sample by measuring the concentration of total organic carbon in the water sample.

[0113] In an embodiment provided by the present application, the selection of wastewater treatment methods according to the wastewater composition information includes:

[0114] If the wastewater composition information contains solid particles, the solid precipitation method is used for treatment;

[0115] If heavy metal elements are contained in the wastewater component information, a comprehensive treatment is carried out by integrating chemical precipitation, ion exchange and electro-deposition methods;

[0116] If acidic substances are contained in the wastewater component information, a neutralization method is adopted for acid-base neutralization treatment;

[0117] If toxic chemical substances are contained in the wastewater component information, a comprehensive treatment is carried out by integrating advanced oxidation and adsorption methods;

[0118] If soluble inorganic substances are contained in the wastewater component information, ion exchange and reverse osmosis methods are adopted for treatment;

[0119] If organic pollutants are contained in the wastewater component information, adsorption, oxidation and chemical precipitation methods are adopted for treatment.

[0120] Specifically, in this embodiment, a specific wastewater treatment method is selected according to the wastewater component information. For different types of pollutants, corresponding treatment methods or combined schemes are adopted, which can effectively remove harmful substances in the wastewater and meet the environmental protection requirements.

[0121] Embodiment 2

[0122] Please refer to Figure 4 , this embodiment of the present application provides a tailings slag resource-based wastewater recovery and treatment system, which applies a tailings slag resource-based wastewater recovery and treatment method as described above, including:

[0123] A sample acquisition module: used to acquire a wastewater sample of the tailings slag resource-based wastewater;

[0124] A sample analysis module: used to analyze the wastewater sample to obtain wastewater component information;

[0125] A wastewater treatment module: used to select a wastewater treatment method according to the wastewater component information;

[0126] A wastewater re-detection module: used to re-detect the wastewater to be discharged obtained after treatment. If no harmful substances are detected, or the content of the harmful substances is lower than the specified content threshold, the wastewater to be discharged is discharged; otherwise, the wastewater to be discharged is recycled and re-treated;

[0127] Among them, the harmful substances and the specified content threshold are determined according to the impact degree of the tailings slag resource-based wastewater on the local environment.

[0128] In the above embodiments, the descriptions of each embodiment have their own emphases. For parts not detailed or recorded in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0129] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the above division of each functional unit and module is used as an example. In actual applications, the above functions can be allocated to different functional units and modules according to needs, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. Each functional unit and module in the embodiment can be integrated into a processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit. In addition, the specific names of each functional unit and module are only for the convenience of mutual distinction and do not limit the protection scope of the present application. The specific working processes of the units and modules in the above system can refer to the corresponding processes in the foregoing method embodiments and will not be elaborated here.

[0130] Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present invention.

[0131] The above is only a preferred embodiment of the present invention and does not impose any form of limitation on the present invention. Although the present invention has been disclosed above with a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to make equivalent embodiments with equivalent changes within the scope of the technical solution of the present invention. However, as long as it does not depart from the content of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A method for recycling wastewater from tailings, characterized in that: The steps include: Obtain wastewater samples from tailings recycling wastewater; Performing sample analysis on the wastewater sample to obtain wastewater composition information; selecting a wastewater treatment method according to the wastewater composition information; Re-test the wastewater to be discharged after treatment. If no harmful substances are detected therein or the content of the harmful substances is lower than the prescribed content threshold, the wastewater to be discharged is discharged; otherwise, the wastewater to be discharged is recycled and re-processed; The harmful substances and the specified content thresholds are determined according to the degree of impact of the tailings resource wastewater on the local environment.

2. The method for recycling wastewater from tailings slag resources according to claim 1, characterized in that: The sample analysis of the wastewater sample comprises: Performing solid-liquid testing on the wastewater sample to screen out solid particles and solid-free wastewater; Conducting heavy metal testing on the solid-free wastewater to screen out heavy metal elements; Conducting acidic substance detection on the solid-free wastewater to screen out acidic substances; Conducting chemical substance testing on the solid-free wastewater to screen out toxic chemicals; The solid-free wastewater is subjected to an inorganic matter detection to screen out soluble inorganic and organic pollutants.

3. A method for recycling wastewater from tailings according to claim 2, characterized in that: The wastewater composition information includes solid particles, heavy metal elements, acidic substances, toxic chemicals, soluble inorganic substances and organic pollutants.

4. A method for recycling wastewater from tailings according to claim 2, characterized in that: The solid-liquid detection of the wastewater sample comprises: The wastewater sample is first filtered by a filtration method to separate solid particles with large pore sizes; The wastewater sample is subjected to a second filtration using a sedimentation method to separate solid particles with a medium pore size; The wastewater sample is subjected to a third filtration by centrifugation to separate solid particles with fine pore sizes; Quantitatively measuring the concentration of solids in the wastewater sample after solid particle separation, if there are no solid particles in the wastewater sample, or the concentration of solid particles is lower than a preset concentration threshold, the solid-free wastewater is obtained; Wherein, the pore size of the solid particles is determined according to actual measurement.

5. The method for recycling wastewater from tailings according to claim 2, characterized in that: The heavy metal detection of the solid-free wastewater includes: The heavy metal concentration in the solid-free wastewater is detected by an electrochemical method. If the heavy metal concentration is low, inductively coupled plasma mass spectrometry and enrichment separation-spectrophotometry are used to detect and screen out a variety of heavy metal elements; if the heavy metal concentration is high, inductively coupled plasma emission spectroscopy is used to detect and screen out a variety of heavy metal elements; The solid-free wastewater is also tested by vapor atomic absorption to screen out volatile heavy metal elements. Analyze the heavy metal content in the solid-free wastewater according to the heavy metal detection results; The level of the heavy metal concentration is determined according to the degree of impact of the heavy metal element on the environment.

6. The method for recycling wastewater from tailings according to claim 2, characterized in that: The step of conducting acidic substance detection on the solid-free wastewater comprises: Using pH determination method and acid-base titration method to determine whether the solid-free wastewater contains acidic substances; The strength of the acidic substances in the solid-free wastewater is tested by an acidity strength determination method to obtain the total amount of acidic components; Using ion chromatography to separate and quantitatively analyze various acidic ions in the solid-free wastewater; Detecting and analyzing the volatile organic acids in the solid-free wastewater by gas chromatography-mass spectrometry; Detecting and analyzing the soluble organic acids in the solid-free wastewater by high performance liquid chromatography; The acidic substances with ultraviolet absorption characteristics in the solid-free wastewater are detected and analyzed by ultraviolet-visible light spectroscopy.

7. The method for recycling wastewater from tailings according to claim 2, characterized in that: The step of testing the solid-free wastewater for chemical substances comprises: Using an ion selective electrode method to detect cyanide in the solid-free wastewater to obtain the cyanide content; Using gas chromatography-mass spectrometry to perform flotation agent detection on the solid-free wastewater to obtain the type of flotation machine; The solid-free wastewater is tested for toxic substances by liquid chromatography-mass spectrometry to obtain the types and contents of the toxic substances.

8. The method for recycling wastewater from tailings according to claim 2, characterized in that: The inorganic matter detection of the solid-free wastewater comprises: Using ion chromatography to detect the soluble inorganic matter in the solid-free wastewater to obtain soluble inorganic ions and ion concentrations; The organic pollutants in the solid-free wastewater are detected by gas chromatography-mass spectrometry, and the total organic carbon analysis method is used to detect the concentration of total organic carbon in the solid-free wastewater.

9. The method for recycling wastewater from tailings according to claim 1, characterized in that: The selecting of a wastewater treatment method according to the wastewater composition information includes: If the wastewater composition information contains solid particles, solid precipitation method is used for treatment; If the wastewater composition information contains heavy metal elements, a comprehensive treatment method is used by integrating chemical precipitation, ion exchange and electrodeposition; If the wastewater composition information contains acidic substances, the neutralization method is used for acid-base neutralization treatment; If the wastewater composition information contains toxic chemicals, the advanced oxidation method and adsorption method are integrated for comprehensive treatment; If the wastewater composition information contains dissolved inorganic matter, ion exchange and reverse osmosis methods are used for treatment; If the wastewater composition information contains organic pollutants, it will be treated by adsorption, oxidation and chemical precipitation.

10. A tailings slag resource wastewater recovery treatment system, using a tailings slag resource wastewater recovery treatment method as claimed in any one of claims 1 to 9, characterized in that: include Sample acquisition module: used to obtain wastewater samples of tailings wastewater; Sample analysis module: used to perform sample analysis on the wastewater sample to obtain wastewater composition information; Wastewater treatment module: used to select a wastewater treatment method according to the wastewater composition information; Wastewater re-testing module: used to re-test the wastewater to be discharged after treatment. If no harmful substances are detected in the wastewater or the content of the harmful substances is lower than the specified content threshold, the wastewater to be discharged is discharged; otherwise, the wastewater to be discharged is recycled and reprocessed; The harmful substances and the specified content thresholds are determined according to the degree of impact of the tailings resource wastewater on the local environment.

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