Sulfide oxidation acid production kinetics prediction experiment device based on humidity box

Abstract

The embodiment of the utility model discloses a sulfide oxidation acid production dynamics prediction experiment device based on a humidity box, relates to the field of environmental geology and hydrogeochemistry, and can effectively improve the accuracy and effectiveness of acidic water prediction. The experimental device comprises a constant temperature and humidity system, the constant temperature and humidity system is provided with a containing cavity, and the temperature and humidity of the containing cavity are controllable; the leaching and collecting system comprises a leaching device and a collecting container; and the leachate analysis system is used for analyzing the leachate, collected by the leaching collection system, of the sulfide minerals. The method is suitable for the scene of accurately evaluating the key influence factors of the sulfide oxidation acid production rate.

Description

Technical Field

[0001] The present application relates to the fields of environmental geology and hydrogeochemistry, and in particular to a humidity chamber-based experimental device for predicting the kinetics of sulfide oxidation and acid production. Background Art

[0002] During mining operations, the oxidation of sulfide minerals, such as pyrite, is the primary cause of acid mine drainage (AMD). Accurately predicting the generation of AMD and its water quality characteristics is crucial for environmental protection and sustainable development in mining companies.

[0003] Traditional methods for predicting acidic water include static and dynamic acid generation tests. Static tests assess the acid generation potential and neutralization capacity of rock samples through chemical and mineralogical analysis. However, static test results often differ from field conditions and fail to accurately reflect actual acid generation. Traditional dynamic tests study the oxidation kinetics of sulfides, but their results suffer from scale effects, making them difficult to directly apply to field predictions. Field testing is costly and time-consuming and can only be performed during the mine's operational phase. Utility Model Content

[0004] In order to solve the problem that existing prediction experimental devices cannot accurately test the actual acid production of sulfide minerals, an embodiment of the present application provides a sulfide oxidation acid production kinetics prediction experimental device based on a humidity chamber.

[0005] The present invention provides a humidity chamber-based experimental device for predicting the kinetics of sulfide oxidation and acid production, comprising:

[0006] A constant temperature and humidity system, wherein the constant temperature and humidity system is provided with a receiving chamber, and the temperature and humidity of the receiving chamber are controllable;

[0007] A leaching collection system, comprising a leaching device and a collection container, wherein the leaching device is provided with a leaching chamber, the leaching chamber being used to place sulfide minerals and inject fluid to leach the sulfide minerals; the collection container being used to collect the leachate of the sulfide minerals; wherein the leaching device can be placed in the receiving chamber;

[0008] A leachate analysis system is used to analyze the leachate of the sulfide mineral collected by the leachate collection system.

[0009] In a specific embodiment, the top of the leaching device is provided with an opening connected to the leaching chamber, and a detachable filter plate is also provided in the leaching device; the leaching chamber includes an upper chamber located above the filter plate and a lower chamber located below the filter plate.

[0010] In a specific embodiment, the upper chamber is a columnar structure, the lower chamber is a funnel structure, and a control valve is provided at the bottom of the funnel structure.

[0011] In a specific embodiment, the leachate collection system further includes an exposure container, which is a barrel-shaped structure.

[0012] In a specific embodiment, the columnar structure has a first inner diameter, and the barrel-shaped structure has a second inner diameter, and the second inner diameter is larger than the first inner diameter.

[0013] In a specific embodiment, the leaching collection system further includes a placement platform, which includes a bracket and a plate connected to the upper portion of the bracket, the leaching device is embedded in the plate, and the control valve is located below the plate.

[0014] In a specific embodiment, the constant temperature and humidity system includes an ultrasonic humidifier and a constant temperature leaching box, and the leaching chamber is arranged in the constant temperature leaching box, wherein the ultrasonic humidifier is provided with a dehumidification hole, and the side wall of the constant temperature leaching box is provided with an air inlet hole, and the dehumidification hole of the ultrasonic humidifier is connected to the air inlet hole on the side wall of the constant temperature leaching box through a pipeline.

[0015] In a specific embodiment, the Liu Huawei oxidation acid production kinetics prediction experimental device based on the humidity chamber also includes a filtration device, which is equipped with a polytetrafluoroethylene filter membrane. The filtration device is used to filter the leachate collected in the collection container through the polytetrafluoroethylene filter membrane.

[0016] In a specific embodiment, the leachate analysis system includes an ion chromatograph and an inductively coupled plasma mass spectrometer for analyzing the ion concentration and harmful elements in the leachate of the sulfide mineral.

[0017] The embodiments of the present application provide a humidity chamber-based sulfide oxidation acid production kinetics prediction experimental device, which includes a constant temperature and humidity system, a leaching collection system, and a leachate analysis system; the constant temperature and humidity system is provided with a holding chamber, and the temperature and humidity of the holding chamber are controllable; the leaching collection system includes a leaching device and a collection container, the leaching device is provided with a leaching chamber, the leaching chamber is used to place sulfide minerals and inject fluid to leach the sulfide minerals; the collection container is used to collect the leachate of the sulfide minerals; wherein the leaching device can be placed in the holding chamber; the leachate analysis system is used to analyze the leachate of the sulfide minerals collected by the leaching collection system. The device can collect leachates of different mineral combinations, at different humidity, temperature and exposure areas, and analyze the effects of oxidation on the acid production rate and harmful elements of the sulfide minerals under different conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 A schematic diagram of the structure of a constant temperature and humidity system of a sulfide oxidation acid production kinetics prediction experimental device based on a humidity chamber provided in an embodiment of the present application;

[0020] Figure 2 A schematic diagram of the structure of the leaching and collection system of the humidity chamber-based sulfide oxidation acid production kinetics prediction experimental device provided in an embodiment of the present application;

[0021] Figure 3 A schematic diagram of an exposure container of a humidity chamber-based experimental device for predicting the kinetics of sulfide oxidation and acid production provided in an embodiment of the present application;

[0022] Description of main reference numerals:

[0023] 1-constant temperature leaching box; 2-leaching device; 3-ultrasonic humidifier; 21-leaching chamber; 22-filter plate; 23-placing platform; 24-valve; 25-collection container. DETAILED DESCRIPTION

[0024] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0025] It should be clear that the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0026] like Figure 1 As shown, an embodiment of the present application provides a sulfide oxidation acid production kinetics prediction experimental device based on a humidity chamber, which may include:

[0027] The constant temperature and humidity system includes a constant temperature leaching box 1 and an ultrasonic humidifier 3. The constant temperature leaching box 1 is provided with a receiving chamber, the temperature and humidity of the receiving chamber are controllable, and the ultrasonic humidifier 3 is used to provide humidified air to the constant temperature leaching box 1. The constant temperature leaching box 1 is used to create a constant temperature and humidity environment in its receiving chamber;

[0028] The leaching collection system includes a leaching device 2 and a collection container 25. The leaching device 2 is provided with a leaching chamber 21, which is used to place sulfide minerals and inject fluid to leach the sulfide minerals; the collection container 25 is used to collect the leachate of the sulfide minerals; wherein the leaching device 2 is placed in the receiving chamber of the constant temperature leaching box 1;

[0029] The leachate analysis system is used to analyze the ion concentration and harmful elements in the leachate of the sulfide mineral collected by the leaching collection system.

[0030] The embodiments of the present application provide a humidity chamber-based sulfide oxidation acid production kinetics prediction experimental device, which includes a constant temperature and humidity system, a leaching collection system, and a leachate analysis system; the constant temperature and humidity system is provided with a holding chamber, and the temperature and humidity of the holding chamber are controllable; the leaching collection system includes a leaching device and a collection container, the leaching device is provided with a leaching chamber, the leaching chamber is used to place sulfide minerals and inject fluid to leach the sulfide minerals; the collection container is used to collect the leachate of the sulfide minerals; wherein the leaching device can be placed in the holding chamber; the leachate analysis system is used to analyze the leachate of the sulfide minerals collected by the leaching collection system. The device can collect leachates of different mineral combinations, at different humidity, temperature and exposure areas, and analyze the effects of oxidation on the acid production rate and harmful elements of the sulfide minerals under different conditions.

[0031] Optionally, in one embodiment of the present application, the leaching chamber 21 of the leaching device 2 can be a plexiglass leaching column, and the leaching chamber 21 is used to place sulfide minerals and inject fluid; the leaching chamber 21 is provided with a detachable filter plate 22, and the filter plate 22 is used to freely pass the fluid and block the sulfide minerals from flowing out with the fluid; the upper cavity of the leaching chamber 21 is a columnar structure, and the columnar structure has a first inner diameter, and the lower cavity is a funnel-shaped structure, and a valve 24 is provided at the bottom of the funnel structure, and the valve 24 is used to control the residence time of the fluid in the leaching chamber 21.

[0032] Optionally, in one embodiment of the present application, the leaching collection system further includes a placement platform 23, which includes a bracket and a plate body connected to the upper part of the bracket. The bracket is composed of four pillars connected to the four corners of the plate body. The leaching chamber 21 is embedded in the plate body, and the control valve 24 is located below the plate body. The placement platform 23 is used to stabilize the entire leaching collection system.

[0033] like Figure 3As shown, optionally, in one embodiment of the present application, the sulfide oxidation acid production kinetics prediction experimental device based on the humidity chamber also includes an exposure container, which is a barrel-shaped structure. The barrel-shaped structure has a second inner diameter, and the second inner diameter is larger than the first inner diameter of the above-mentioned columnar structure. The exposure container can be an inverted frustum plastic barrel, or a barrel-shaped container made of other materials. The exposure container is used to change the exposure area of ​​the sulfide ore.

[0034] Optionally, in one embodiment of the present application, the ultrasonic humidifier 3 is provided with a dehumidification hole, and the side wall of the constant temperature leaching box 1 is provided with an air inlet hole. The dehumidification hole of the ultrasonic humidifier 3 is connected to the air inlet hole on the side wall of the constant temperature leaching box 1 through a pipeline, and the ultrasonic humidifier 3 is used to provide humidified air to the accommodating cavity of the constant temperature leaching box 1.

[0035] Optionally, in one embodiment of the present application, the sulfide oxidation acid production kinetics prediction experimental device based on the humidity chamber also includes a filtration device, which is equipped with a polytetrafluoroethylene filter membrane. The filtration device is used to filter the leachate collected in the collection container 25 through the polytetrafluoroethylene filter membrane.

[0036] Optionally, in one embodiment of the present application, the leachate analysis system includes an ion chromatograph and an inductively coupled plasma mass spectrometer, which are used to analyze the ion concentration and harmful elements in the leachate of the sulfide mineral.

[0037] When the device is actually used, deionized water is pre-filled into the water tank of the independent ultrasonic humidifier 3, 1 kg of ground sulfide minerals are placed in the leaching chamber 21 of the leaching device 2, and then the leaching device 2 is placed in the receiving chamber of the constant temperature leaching box 1; the switches of the constant temperature leaching box 1 and the ultrasonic humidifier 3 are turned on, the temperature and humidity values ​​are set to the required temperature and humidity, and the box door is closed; after the required experimental time, the leaching device 2 is taken out from the receiving chamber of the constant temperature leaching box 1; the valve 24 is closed, 600 mL of ultrapure water is poured into the leaching chamber 21 and allowed to flow from top to bottom through the sample material layer, and then the sample is returned to the humidity box; the leaching device 2 is then taken out from the constant temperature leaching box 1 and placed on a horizontal platform, and the collection container 25 is placed on the four pillars of the platform 23. The leaching device 21 is placed directly below the funnel-shaped structure in the lower cavity of the leaching chamber 21, and the valve 24 is opened to collect the leachate. The collected leachate volume is recorded, and the leaching device is finally returned to the humidity chamber. The leachate is filtered using a suction filtration device (0.45µm polytetrafluoroethylene filter membrane) and placed into a 600mL polyethylene bottle. The ion concentration and harmful elements in the leachate are analyzed using an ion chromatograph and an inductively coupled plasma mass spectrometer in the leachate analysis system. If the exposure area of ​​the sulfide minerals needs to be changed during the experiment, the sulfide minerals can be placed in the exposure container instead of the leaching chamber 21 of the leaching device 2. When leaching is required, the sulfide minerals are transferred from the exposure container to the leaching chamber 21 of the leaching device 2 for leaching.

[0038] Through the above technical solution, the kinetic prediction experiment of acid production from sulfide mineral oxidation can simulate different temperature, humidity conditions, exposure areas and mineral combinations. Through dynamic leaching experiments, the acid production rate and the release behavior of harmful elements can be quantitatively analyzed, thereby improving the accuracy and reliability of acidic water prediction.

[0039] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0040] The above content has briefly described the embodiments of the present application in detail. Those skilled in the art can design and modify the device and its usage within the scope of the present application according to the on-site construction conditions.

[0041] Each embodiment in this specification is described in a related manner. The same or similar parts between the embodiments can be referred to each other. Each embodiment focuses on the differences from other embodiments.

[0042] The above is merely a specific embodiment of the present application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A kinetic prediction experimental device for sulfide oxidation acid production based on a humidity chamber, characterized in that: include; A constant temperature and humidity system, wherein the constant temperature and humidity system is provided with a receiving chamber, and the temperature and humidity of the receiving chamber are controllable; A leaching collection system, comprising a leaching device and a collection container, wherein the leaching device is provided with a leaching chamber, the leaching chamber being used to place sulfide minerals and inject fluid to leach the sulfide minerals; the collection container being used to collect the leachate of the sulfide minerals; wherein the leaching device can be placed in the receiving chamber; A leachate analysis system is used to analyze the leachate of the sulfide mineral collected by the leachate collection system.

2. The sulfide oxidation acid production kinetics prediction experimental device based on a humidity chamber according to claim 1, characterized in that: The top of the leaching device is provided with an opening connected to the leaching chamber. A detachable filter plate is also provided in the leaching device. The leaching chamber includes an upper chamber located above the filter plate and a lower chamber located below the filter plate.

3. The sulfide oxidation acid production kinetics prediction experimental device based on a humidity chamber according to claim 2, characterized in that: The upper cavity is a columnar structure, the lower cavity is a funnel-shaped structure, and a control valve is provided at the bottom of the funnel-shaped structure.

4. The sulfide oxidation acid production kinetics prediction experimental device based on a humidity chamber according to claim 3, characterized in that: An exposure container is also included. The exposure container is a barrel-shaped structure, wherein the columnar structure has a first inner diameter, and the barrel-shaped structure has a second inner diameter, and the second inner diameter is larger than the first inner diameter.

5. The sulfide oxidation acid production kinetics prediction experimental device based on a humidity chamber according to claim 4, characterized in that: The leaching collection system further includes a placement platform, which includes a bracket and a plate body connected to the upper part of the bracket. The leaching device is embedded in the plate body, and the control valve is located below the plate body.

6. The sulfide oxidation acid production kinetics prediction experimental device based on a humidity chamber according to claim 1, characterized in that: The constant temperature and humidity system includes an ultrasonic humidifier and a constant temperature leaching box, and the leaching chamber is arranged in the constant temperature leaching box, wherein the ultrasonic humidifier is provided with a dehumidification hole, and the side wall of the constant temperature leaching box is provided with an air inlet hole, and the dehumidification hole of the ultrasonic humidifier is connected to the air inlet hole on the side wall of the constant temperature leaching box through a pipeline.

7. The sulfide oxidation acid production kinetics prediction experimental device based on a humidity chamber according to claim 1, characterized in that: It also includes a suction filtration device, which is equipped with a polytetrafluoroethylene filter membrane. The suction filtration device is used to filter the leachate collected by the collection container through the polytetrafluoroethylene filter membrane.

8. The sulfide oxidation acid production kinetics prediction experimental device based on a humidity chamber according to claim 1, characterized in that: The leachate analysis system includes an ion chromatograph and an inductively coupled plasma mass spectrometer, which are used to analyze the ion concentration and harmful elements in the leachate of the sulfide mineral.

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