Precise leaching agent filling device and method for in-situ leaching uranic acid method

Abstract

The embodiment of the invention discloses an in-situ leaching uranic acid method leaching agent accurate filling device and method.The device comprises an adsorption tail liquid supply pipe, a concentrated acid supply pipe, adjusting devices and a supply assembly, during use, the concentrated acid supply pipe conveys concentrated acid to the adjusting devices connected in parallel, and the adjusting devices precisely control the supply amount of the concentrated acid according to requirements; and the concentrated acid is conveyed to the corresponding branch well injection pipe. The adsorption tail liquid supply pipe continuously conveys tail liquid, the supply assemblies arranged on the branch well injection pipes are started, the tail liquid in the adsorption tail liquid supply pipe is pumped into the branch well injection pipes, the supply amount of the tail liquid is regulated, the tail liquid is mixed with concentrated acid according to a set proportion, and quantitative and fixed-concentration conveying of the acid liquid is achieved. The concentrated acid amount is independently regulated and controlled by the regulating device, and the tail liquid amount is independently regulated and controlled by the supply assembly, so that the acid liquid concentration and the total supply amount are accurately regulated. The supply assembly provides conveying power for the mixed acid liquid, the acid liquid is pushed to be stably injected into the corresponding ore bed through the branch well injection pipes, accurate liquid supply of all the branch well injection pipes according to needs is achieved, and the different liquid injection requirements of different ore beds are met.

Description

Technical Field

[0001] This application relates to the field of in-situ leaching uranium mining technology, and in particular to a device and method for precise injection of acid leaching agent in in-situ leaching uranium mining. Background Technology

[0002] Acid leaching is a core technology for ensuring my country's natural uranium production capacity, and its efficiency is highly dependent on the precise proportioning and dynamic control of the leaching solution. However, most mines currently still use a "flood irrigation" model, that is, injecting the same concentration of leaching agent into the main injection pipeline. The injection parameters (such as acid concentration) delivered from the main pipeline to each branch injection well cannot be adjusted differently. The leaching agent concentration of hundreds of injection wells in the same mining area is highly consistent, resulting in a lack of differentiated response to the physical properties of the ore layer and the distribution characteristics of uranium grade. This leads to excessive enrichment of leaching agent in low-grade areas and insufficient utilization in high-grade areas, resulting in serious resource waste and easily causing problems such as local over-acidification and ore layer blockage.

[0003] This problem is particularly pronounced in the later stages of mining: as the leaching reaction of the ore layer proceeds, the formation pressure continues to rise, and the traditional method of controlling flow by "pressure buildup" using regulating valve 3 becomes unsustainable: the valve opening is limited, the pumping pressure cannot be effectively transmitted to the injection well, resulting in a significant decrease in injection flow rate, and even the phenomenon of "no injection." At the same time, branch pipelines generally lack independent acid mixing units, and acid still needs to be introduced from the main system, making it impossible to achieve independent control of concentration and flow rate, forming a "concentration-flow coupling" bottleneck.

[0004] Therefore, there is an urgent need for a device and method that can provide an independent injection pump (providing constant power) and an independent metering acid mixing system in the branch pipeline, so as to achieve dual independent control of concentration and flow rate, break through the traditional mining mode of "flood irrigation", and provide physical support for the intelligent upgrade of in-situ leaching uranium mining to "one hole, one policy, precise drip irrigation". Summary of the Invention

[0005] The summary section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This part of the invention is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0006] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0007] Therefore, a first aspect of the present invention provides a device for precise injection of leaching agent in the in-situ uranium leaching process.

[0008] A second aspect of the present invention provides a method for supplying acid for in-situ leaching uranium mining.

[0009] In view of this, a precise dosing device for uranium leaching leaching agent in in-situ leaching is provided according to a first aspect of the embodiments of this application, comprising:

[0010] Adsorption tail liquid supply pipe; Concentrated acid supply pipe; Multiple branch injection pipes, wherein the multiple branch injection pipes are connected to the adsorption tail fluid supply pipe; Multiple regulating devices are provided, each of the branch injection pipes is provided with a regulating device, the concentrated acid supply pipe is connected to the regulating device, the multiple regulating devices are connected in parallel relative to the concentrated acid supply pipe, and the concentrated acid supply pipe is connected to the branch injection pipe through the regulating device; Multiple supply components are provided, and each of the branch injection pipes is provided with a supply component, which is used to pump the liquid in the adsorbed tail fluid supply pipe to the branch injection pipe.

[0011] In one feasible implementation, the adjusting device includes: A filter, a first pump body, and a check valve are arranged sequentially along the acid delivery direction on the concentrated acid supply pipe. The check valve only allows concentrated acid to be supplied to the branch injection pipe via the concentrated acid supply pipe.

[0012] In one feasible implementation, the adjusting device further includes: A first pressure gauge, a first flow meter, and a shut-off valve are arranged along the acid delivery direction on one side of the check valve.

[0013] In one feasible implementation, the concentrated acid supply pipe further includes: A mixed acid heat release tube is arranged at the output end of the concentrated acid supply tube. The mixed acid heat release tube is L-shaped, and part of the mixed acid heat release tube is inserted into the branch injection pipe and arranged along the length direction of the branch injection pipe.

[0014] In one feasible implementation, the supply component includes: A second pump body, a second pressure gauge, and a second flow meter are sequentially arranged on the branch injection pipe along the tail fluid delivery direction. The second flow meter is located on the side of the regulating device close to the adsorption tail fluid supply pipe.

[0015] In one feasible implementation, the supply component further includes: A pH sensor and a temperature sensor are arranged at the output end of the branch injection pipe.

[0016] In one feasible implementation, the precise dosing device for uranium leaching acid leaching agent further includes: Control valves are arranged on each of the branch injection pipes; A concentrated acid storage tank, wherein the input end of the concentrated acid supply pipe is connected to the concentrated acid storage tank.

[0017] According to a second aspect of the embodiments of this application, a method for supplying acid solution for in-situ leaching uranium mining is provided, applied to the precise injection device for acid leaching agents in in-situ leaching uranium mining as described in any of the above technical solutions, the method for supplying acid solution for in-situ leaching uranium mining includes: Collect mineral information of the ore layer corresponding to each branch injection pipe; Based on the mineral information, determine the acid information required for each branch injection pipe; Based on the acid information, the concentrated acid supply is controlled by the regulating device, and the tail liquid supply is controlled by the supply component to prepare the acid solution. Acid is delivered to the ore formation through the branch injection pipe.

[0018] In one feasible implementation, the step of determining the required acid information for each branch injection pipe based on the mineral information includes: Obtain the total amount of useful minerals and permeability coefficient from the mineral information, and determine the acid supply based on the total amount of useful minerals; The total mineral content is positively correlated with the acid supply, while the permeability coefficient is negatively correlated with the acid supply.

[0019] The step of determining the acid information required for each branch injection pipe based on the mineral information further includes: Obtain associated state information from mineral information, and determine the concentration of acid solution based on the associated state information.

[0020] Compared with the prior art, the present invention has at least the following beneficial effects: The precise injection device for uranium leaching acid in uranium mining provided in this application includes an adsorption tailings supply pipe, a concentrated acid supply pipe, a regulating device, and a supply assembly. During use, the concentrated acid supply pipe delivers concentrated acid to each parallel regulating device. The regulating device precisely controls the concentrated acid supply according to demand, delivering the concentrated acid to the corresponding branch injection pipe. Simultaneously, the adsorption tailings supply pipe continuously delivers tailings. The supply assembly configured in each branch injection pipe is activated, pumping the tailings from the adsorption tailings supply pipe into the branch injection pipe and regulating the tailings supply, mixing it with the concentrated acid in a set ratio to achieve quantitative and constant-concentration acid delivery. Through the independent regulation of the concentrated acid quantity by the regulating device and the tailings quantity by the supply assembly, the acid concentration and total supply are precisely adjusted. The supply assembly provides the power for transporting the mixed acid, propelling the acid through the branch injection pipes and stably injecting it into the corresponding ore layer, enabling precise on-demand fluid supply to each branch injection pipe and adapting to the differentiated injection needs of different ore layers.

[0021] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0022] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 A schematic structural diagram of a precise leaching device for uranium leaching in terrestrial uranium acid mining according to an embodiment of this application; Figure 2 A schematic structural diagram of the adjusting device of the precision injection device for the uranium leaching process in terrestrial leaching provided in this application; Figure 3 A schematic structural diagram of the mixed acid exothermic tube of a precise dosing device for uranium leaching in terrestrial leaching, according to another embodiment of this application; Figure 4 A schematic flowchart illustrating the steps of an acid supply method for uranium mining by in-situ leaching, provided in this application. Figure 5 A schematic flowchart illustrating the steps of an acid supply method for uranium mining by in-situ leaching, according to another embodiment of this application; in, Figures 1 to 3 The correspondence between the reference numerals and component names in the attached drawings is as follows: 1. Concentrated acid supply pipe, 2. Regulating device, 3. Regulating valve, 4. Branch injection pipe, 5. Adsorption tail fluid supply pipe, 6. pH sensor, 7. Temperature sensor, 8. Mixed acid exothermic pipe, 9. Shut-off valve, 10. First flow meter, 11. First pressure gauge, 12. Check valve, 13. First pump body, 14. Filter, 15. Supply assembly, 16. Second flow meter, 17. Second pressure gauge, 18. Second pump body, 19. Short pipe section, 20. Long pipe section. Detailed Implementation

[0023] The following description provides numerous specific details to offer a more thorough understanding of the technical solutions provided by this invention. However, it will be apparent to those skilled in the art that the technical solutions provided by this invention can be implemented without one or more of these details.

[0024] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms “comprising” and / or “including” are used in this specification, they indicate the presence of the stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or combinations thereof.

[0025] Exemplary embodiments according to the present invention will now be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of the invention is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art.

[0026] like Figures 1 to 3 As shown, according to a first aspect of the embodiments of this application, a precise injection device for uranium leaching agent in in-situ leaching is proposed, comprising: an adsorption tail fluid supply pipe 5; a concentrated acid supply pipe 1; multiple branch injection pipes 4, the multiple branch injection pipes 4 being connected to the adsorption tail fluid supply pipe 5; multiple regulating devices 2, each branch injection pipe 4 being provided with a regulating device 2, the concentrated acid supply pipe 1 being connected to the regulating device 2, the multiple regulating devices 2 being connected in parallel relative to the concentrated acid supply pipe 1, the concentrated acid supply pipe 1 being connected to the branch injection pipes 4 through the regulating devices 2; and multiple supply components 15, each branch injection pipe 4 being provided with a supply component 15, the supply component 15 being used to pump the liquid in the adsorption tail fluid supply pipe 5 to the branch injection pipe 4.

[0027] The precise injection device for uranium leaching acid in uranium mining provided in this embodiment includes an adsorption tailings supply pipe 5, a concentrated acid supply pipe 1, an adjustment device 2, and a supply component 15. During use, the concentrated acid supply pipe 1 supplies concentrated acid to each parallel adjustment device 2. The adjustment device 2 precisely controls the concentrated acid supply according to demand, delivering the concentrated acid to the corresponding branch injection pipe 4. Simultaneously, the adsorption tailings supply pipe 5 continuously supplies tailings. The supply component 15 configured in each branch injection pipe 4 is activated, pumping the tailings from the adsorption tailings supply pipe 5 into the branch injection pipe 4 and adjusting the tailings supply rate to mix with the concentrated acid in a set ratio, achieving quantitative and constant concentration delivery of the acid solution. Through the independent control of the concentrated acid quantity by the adjustment device 2 and the tailings quantity by the supply component 15, the acid concentration and total supply are precisely adjusted. The supply component 15 provides the power for transporting the mixed acid solution, propelling it through the branch injection pipe 4 and stably injecting it into the corresponding ore layer, enabling precise on-demand injection of each branch injection pipe 4 to meet the differentiated injection needs of different ore layers.

[0028] The precise leaching device for uranium leaching using acid extraction provided in this application embodiment, through the coordinated design of the adsorption tailings supply pipe 5, the concentrated acid supply pipe 1, and multiple branch injection pipes 4, coupled with the parallel regulating device 2 and the independent supply component 15, completely breaks through the limitations of the traditional "flood irrigation" mode. The independent control of the regulating device 2 and the supply component 15 achieves dual independent adjustment of acid concentration and flow rate, adapting to the differences in physical properties and grades of different ore layers, and implementing precise injection with a "one-well-one-policy" approach. This effectively solves problems such as flow rate decay in the later stages of mining, reducing reagent waste and the risk of ore layer blockage. The modular pipeline and component design allows for rapid deployment without modifying the main system, significantly improving installation and maintenance efficiency. The device as a whole greatly improves the utilization efficiency of leaching reagents and uranium recovery rate, promoting the transformation of in-situ leaching uranium extraction technology towards intelligence and precision, and possesses strong engineering applicability and promotional value.

[0029] like Figures 1 to 3 As shown, in one feasible embodiment, the regulating device 2 includes: a filter 14, a first pump body 13, and a one-way valve 12 arranged sequentially along the acid delivery direction on the concentrated acid supply pipe 1. The one-way valve 12 only allows concentrated acid to be supplied to the branch injection pipe 4 via the concentrated acid supply pipe 1.

[0030] In this technical solution, the regulating device 2 may include a filter 14, a first pump body 13, and a one-way valve 12. After the concentrated acid supply pipe 1 obtains concentrated acid from the concentrated acid storage tank, it is sequentially transported to the filter 14 of the regulating device 2 in the direction of acid delivery to filter out impurities and ensure the stable operation of subsequent components. The filtered concentrated acid enters the first pump body 13, which provides power for precise pushing, and then flows through the one-way valve 12. The one-way valve 12 strictly restricts the unidirectional flow of concentrated acid, allowing it to be injected into the corresponding branch injection pipe 4 only through the concentrated acid supply pipe 1, avoiding backflow that could affect the supply accuracy. The regulating devices 2 of each branch injection pipe 4 are distributed in parallel with respect to the concentrated acid supply pipe 1, realizing independent and synchronous concentrated acid supply to multiple branches.

[0031] In this technical solution, the filter 14 of the regulating device 2 effectively removes impurities from the concentrated acid, preventing blockage and wear of pipelines and subsequent equipment, and extending the service life of the device. The first pump body 13 provides stable power for the concentrated acid supply. Combined with the parallel-arranged regulating device 2, it enables independent and precise control of the concentrated acid supply to each branch injection pipe 4, adapting to the differentiated acid requirements of different mineral layers. The one-way valve 12's one-way design completely eliminates concentrated acid backflow, ensuring stable concentrated acid supply pressure and flow rate, and avoiding concentration imbalance caused by backflow. The overall supply method has a simple structure and reliable operation, breaking through the homogeneity limitations of traditional centralized acid supply, providing a stable concentrated acid supply guarantee for precise injection with "one policy per well," and improving reagent utilization efficiency and injection process stability.

[0032] In some examples, filter 14 can be a Y-type filter 14.

[0033] like Figures 1 to 3 As shown, in one feasible embodiment, the regulating device 2 further includes a first pressure gauge 11, a first flow meter 10, and a shut-off valve 9 arranged along the acid delivery direction on one side of the check valve 12.

[0034] In this technical solution, the regulating device 2 may further include a first pressure gauge 11, a first flow meter 10, and a shut-off valve 9. Concentrated acid in the concentrated acid storage tank is transported to each parallel regulating device 2 via the concentrated acid supply pipe 1. Impurities are first filtered out by the filter 14, and then the first pump body 13 provides power for precise delivery. The concentrated acid flows through the one-way valve 12 to ensure unidirectional delivery, and then sequentially passes through the first pressure gauge 11 and the first flow meter 10, with real-time monitoring of supply pressure and flow data. Based on the preset acid mixing ratio requirements, the output of the first pump body 13 and the opening of the shut-off valve 9 are adjusted to precisely control the concentrated acid supply, ultimately ensuring that the concentrated acid meeting the flow and pressure requirements is stably delivered to the corresponding branch injection pipe 4, providing a precise raw material supply for acid mixing.

[0035] In this technical solution, the first pressure gauge 11 and the first flow meter 10 enable real-time monitoring of concentrated acid supply parameters. Combined with the coordinated control of the first pump body 13 and the shut-off valve 9, the accuracy of concentrated acid supply is greatly improved.

[0036] like Figures 1 to 3 As shown, in one feasible embodiment, the concentrated acid supply pipe 1 further includes a mixed acid heat release pipe 8, which is arranged at the output end of the concentrated acid supply pipe 1. The mixed acid heat release pipe 8 is L-shaped, and part of the mixed acid heat release pipe 8 is inserted into the branch injection pipe 4 and arranged along the length direction of the branch injection pipe 4.

[0037] In this technical solution, the concentrated acid supply pipe 1 may include a mixed acid heat-exothermic pipe 8. The L-shaped mixed acid heat-exothermic pipe 8 is partially inserted into the branch injection pipe 4 and arranged along its length, allowing the concentrated acid and adsorbed tail fluid to flow in the same direction within the branch injection pipe 4. This optimizes the mixing flow field, significantly reduces eddies and dead zones, promotes full contact between the two under turbulent conditions, improves the uniformity of acid mixing, and avoids local concentration imbalances. Simultaneously, this structure extends the mixing path and heat dissipation contact area, enabling rapid conduction of the large amount of heat released when concentrated sulfuric acid reacts with water. This effectively prevents local overheating damage to pipelines and equipment, ensuring stable system operation under strong acid and high-temperature conditions. Furthermore, the compatible arrangement of the mixed acid heat-exothermic pipe 8 and the branch injection pipe 4 requires no additional space. Combined with the modular design of the device, it does not affect the overall ease of installation and maintenance, providing reliable mixed acid heat dissipation for precise injection with a "one-hole-one-policy" approach, further enhancing the stability and safety of the injection process.

[0038] In some examples, the mixed acid exothermic pipe 8 includes a short pipe section 19 and a long pipe section 20 connected together. The short pipe section 19 passes through the branch injection pipe 4, and the long pipe section 20 is arranged along the length of the branch injection pipe 4.

[0039] like Figures 1 to 3 As shown, in one feasible embodiment, the supply assembly 15 includes: a second pump body 18, a second pressure gauge 17, and a second flow meter 16 arranged sequentially on the branch injection pipe 4 along the tail fluid delivery direction. The second flow meter 16 is located on the side of the regulating device 2 close to the adsorption tail fluid supply pipe 5.

[0040] In this technical solution, the structural composition of the supply component 15 is further provided. The supply component 15 may include a second pump body 18, a second pressure gauge 17, and a second flow meter 16. The tail fluid in the adsorption tail fluid supply pipe 5 is pumped to the branch injection pipe 4 along the tail fluid delivery direction by the power provided by the second pump body 18 of the supply component 15. The tail fluid flows sequentially through the second pressure gauge 17 and the second flow meter 16, and the delivery pressure and flow data are monitored in real time. The second flow meter 16 is located on the side of the regulating device 2 near the adsorption tail fluid supply pipe 5, and accurately provides feedback on the tail fluid delivery status. According to the acid ratio requirements, the output of the second pump body 18 is adjusted to regulate the tail fluid delivery volume, and it is adapted to mix with the concentrated acid delivered by the regulating device 2 in the branch injection pipe 4 to ensure that the acid concentration meets the standard and achieve stable and controllable delivery of the tail fluid.

[0041] In this technical solution, the second pump body 18 provides stable power for tailings fluid delivery. Combined with real-time monitoring by the second pressure gauge 17 and the second flow meter 16, precise control of tailings fluid flow and pressure is achieved. The rational arrangement of the second flow meter 16 ensures timely feedback of tailings fluid delivery parameters, providing a reliable basis for acid ratio adjustment. The independent setting of the supply component 15 allows for independent adjustment of the tailings fluid delivery volume of each branch injection pipe 4, adapting to the acid requirements of different mineral layers. The overall delivery method ensures the stability and accuracy of tailings fluid supply, providing strong support for precise injection with a "one-hole-one-policy" approach, and improving acid ratio efficiency and injection process reliability.

[0042] like Figures 1 to 3As shown, in one feasible embodiment, the supply component 15 further includes a pH sensor 6 and a temperature sensor 7, which are arranged at the output end of the branch injection pipe 4. This arrangement allows the pH sensor 6 and temperature sensor 7 to accurately capture key parameters of the acid solution about to be injected into the ore layer in real time. The pH sensor 6 dynamically monitors the acidity, providing timely warnings of "over-acidity" risks to prevent localized over-acidity from causing ore layer blockage or equipment corrosion; the temperature sensor 7 provides real-time feedback on the temperature after acid mixing, preventing heat buildup that could damage the pipeline. The data from both sensors provide a reliable basis for the control system, assisting in the dynamic fine-tuning of the concentrated acid volume of the regulating device 2 and the tail fluid volume of the supply component 15, ensuring that the acid concentration and temperature meet standards, further enhancing the stability and safety of the "one-hole-one-policy" precise injection, and improving the overall reliability of the injection process.

[0043] In one feasible implementation, the precision injection device for uranium leaching in in-situ leaching (ISL) uranium acid method further includes: a regulating valve 3, arranged on each branch injection pipe 4; and a concentrated acid storage tank, with the input end of the concentrated acid supply pipe 1 connected to the concentrated acid storage tank. This configuration ensures a stable reserve of concentrated acid in the storage tank, guaranteeing a continuous and sufficient supply of acid from the concentrated acid supply pipe 1 and preventing disruption to injection continuity due to raw material interruptions. The regulating valve 3 on each branch injection pipe 4 can independently control the pipeline's on / off state and flow rate. Combined with the regulating device 2 and the supply component 15, this further refines the injection precision of each branch, flexibly adapting to the dynamic needs of different ore layers. The two components work together to improve the device's supply and control system, ensuring stable raw material supply while enhancing the independent control capability of the branch pipelines, facilitating the implementation of precise injection with a "one-hole-one-policy" approach, and improving the overall reliability and flexibility of the injection process.

[0044] like Figure 4 As shown, according to a second aspect of the embodiments of this application, a method for supplying acid for uranium mining by in-situ leaching is proposed, applied to a precise leaching agent injection device for uranium mining by in-situ leaching as described in any of the above technical solutions. The method for supplying acid for uranium mining by in-situ leaching includes: Step 201: Collect mineral information of the ore layer corresponding to each branch injection pipe; Step 202: Based on mineral information, determine the acid information required for each branch injection pipe; Step 203: Based on the acid information, control the concentrated acid supply through the regulating device and control the tail liquid supply through the supply component to prepare the acid solution; Step 204: Deliver acid to the ore formation through the branch injection pipe.

[0045] The acid supply method for uranium mining provided in this application embodiment, since it is applied to the precise leaching device for uranium mining acid leaching agent as described in any of the above technical solutions, therefore, the acid supply method for uranium mining acid leaching has all the beneficial effects of the precise leaching device for uranium mining acid leaching agent as described in the above technical solutions.

[0046] The acid supply method for in-situ leaching uranium mining provided in this application collects mineral information of the corresponding ore layers in each branch injection pipe. Combined with this mineral information, it can accurately match and output the expected acid concentration and supply volume, achieving targeted adaptation of acid supply. For high-grade ore layers, the acid concentration and supply volume can be increased as needed to ensure sufficient uranium leaching; for low-grade ore layers, parameters are rationally adjusted to avoid reagent waste, making acid supply more targeted. Simultaneously, an independent control mechanism and closed-loop feedback system ensure stable acid parameters, effectively solving the problems of insufficient or excessive leaching in traditional models and significantly improving uranium recovery rates. This ore layer-adaptive supply mode promotes the transformation of in-situ leaching uranium mining from homogeneous supply to precise adaptation, combining economic benefits with resource utilization efficiency.

[0047] In one feasible implementation, the step of determining the acid information required for each branch injection pipe based on mineral information includes: Obtain the total amount of useful minerals and permeability coefficient from the mineral information, and determine the acid supply based on the total amount of useful minerals; Among them, the total mineral content is positively correlated with the acid supply, while the permeability coefficient is negatively correlated with the acid supply.

[0048] This technical solution further provides a method for determining acid supply information. This method accurately captures the total amount of useful minerals and the permeability coefficient from the mineral information to construct a scientifically adapted quantitative logic for acid supply. The positive correlation between the total amount of useful minerals and the acid supply can accurately match sufficient acid supply to high-grade, high-reserve ore layers, ensuring full uranium leaching and avoiding resource waste and low recovery rates due to insufficient supply. The negative correlation between the permeability coefficient and the acid supply can reasonably reduce the supply intensity for ore layers with high permeability, preventing excessive acid loss, while avoiding localized fluid accumulation, over-acidification, and ore layer blockage caused by excessive supply to ore layers with low permeability. This differentiated supply strategy based on the core physical properties of the ore layer completely breaks through the limitations of homogeneous supply in the traditional "flood irrigation" model, enabling precise matching of the acid supply to each branch injection pipe with the leaching requirements of the corresponding ore layer. This not only significantly improves the utilization efficiency of leaching reagents and reduces production costs, but also ensures the stability and sufficiency of the leaching reaction through scientific regulation, significantly improving the uranium ore recovery rate. It provides key quantitative basis for the implementation of the "one hole, one policy, precise drip irrigation" model for in-situ leaching uranium mining, and promotes the transformation of the process towards data-driven intelligent and efficient processes.

[0049] In one feasible implementation, the step of determining the acid information required for each branch injection pipe based on mineral information further includes: obtaining associated state information from the mineral information, and determining the acid concentration based on the associated state information.

[0050] This technical solution further provides a method for determining acid concentration. This method accurately captures associated state information from mineral information, constructing a mineral-adaptive concentration control logic. Associated state information directly reflects the combination characteristics of uranium ore with other associated minerals in the mineral layer. Determining the acid concentration based on this information allows for targeted adaptation: for associated minerals that easily consume acid (such as carbonates), the acid concentration can be appropriately increased to ensure the effective acidity required for uranium ore leaching; for associated minerals that easily cause side reactions or mineral layer blockage (such as silicates), the concentration can be precisely reduced to avoid adverse consequences from excessive acidification. This differentiated concentration setting based on associated state completely breaks the limitations of traditional homogeneous "flood irrigation" fluid supply, ensuring that the acid concentration of each branch injection pipe precisely matches the mineral composition of the corresponding mineral layer. This avoids both the waste of reagents, equipment corrosion, and mineral layer blockage risks caused by excessively high concentrations, and the problem of insufficient uranium ore leaching caused by excessively low concentrations. Meanwhile, a complete adaptation system is formed with the coordinated regulation of acid supply, which further enhances the scientific nature and effectiveness of precise injection for each well, significantly improves the utilization efficiency of leaching reagents and uranium recovery rate, and provides key technical support for the transformation of in-situ leaching uranium mining technology towards data-driven intelligent and efficient processes.

[0051] Example like Figures 1 to 5 As shown, the present invention provides a precise injection device for uranium leaching acid in in-situ leaching, including an adsorption tail liquid supply pipe 5, a concentrated acid supply pipe 1, and a branch injection pipe 4 connected to the adsorption tail liquid supply pipe 5, as well as an adjustment device 2 and a supply component 15 installed in the branch injection pipe. The components work together to achieve dual independent control of acid concentration and injection flow rate.

[0052] The regulating device 2 includes a concentrated sulfuric acid storage tank, a first pump body 13, and a first flow meter 10. The concentrated sulfuric acid storage tank is used to store high-concentration sulfuric acid, and its outlet is connected to the first pump body 13. The first pump body 13 is a diaphragm pump or a peristaltic pump, used to accurately deliver concentrated sulfuric acid according to a set ratio. The outlet of the first pump body 13 is connected to the dilution water inlet. The dilution water is introduced through an independent pipeline and, after flow control, enters the branch injection pipe 4 through the mixed acid heat release pipe 8. The mixed acid heat release pipe 8 has an L-shaped nozzle structure, which allows the concentrated sulfuric acid and dilution water to be fully mixed in a turbulent state, improving the mixing uniformity, and utilizing natural heat release to remove the large amount of heat released by the concentrated sulfuric acid upon contact with water. The mixed acid solution is detected by a pH sensor 6, which is connected to the control system to achieve real-time concentration feedback. When the actual concentration deviates from the set value, the control system automatically adjusts the speed of the first pump body 13 or the dilution water flow rate to achieve closed-loop control and ensure that the acid concentration is stable and controllable.

[0053] The output end of the supply component 15 is connected to the branch injection well. The second pump body 18 of the supply component 15 is a variable frequency diaphragm pump or a variable frequency screw pump, which has adjustable pumping pressure and flow rate and a response time of less than 1 second. The pump body is lined with a strong acid resistant alloy or modified fluoroplastic, which has good corrosion resistance and thermal stability. A second pressure gauge is provided at the pump outlet to monitor the outlet pressure in real time. Combined with the formation pressure feedback information, the pumping power is dynamically adjusted to overcome the impact of the formation pressure increase in the middle and late stages of mining and maintain a stable output of the set flow rate.

[0054] The precise injection device for uranium leaching in in-situ uranium acid method adopts a modular installation structure and is integrated into the branch injection pipeline via flange connection, eliminating the need to modify the main system and supporting quick disassembly and maintenance. Simultaneously, the device features an L-shaped nozzle structure, with its inlet connected to the outlet of the second pump body 18, and its outlet merging with the main water flow to achieve co-directional injection, reducing eddies and dead zones. The nozzle body is made of high thermal conductivity material and has an axial heat dissipation channel, working in conjunction with a temperature sensor 7 to monitor the thermal state and prevent localized overheating.

[0055] The precise injection device for acid leaching agent in in-situ uranium leaching provided in this application embodiment effectively solves core problems in traditional in-situ uranium leaching processes, such as homogenization of injection parameters, coupled control of concentration and flow rate, and flow rate attenuation with increasing formation pressure. By integrating an independent regulating device 2 and an independent supply component 15 into the branch injection pipe 4, dual independent control of acid concentration and injection flow rate is achieved, significantly improving the flexibility and precision of the injection process. Especially in the later stages of mining when formation pressure increases, the independent injection pump can provide stable and adjustable pumping power, overcoming the limitations of traditional valve pressure-holding methods and ensuring the continuity and controllability of injection. The L-shaped mixed acid heat release pipe 8 effectively optimizes the acid mixing flow field, improves mixing uniformity, and achieves rapid conduction of dilution heat release, enhancing the system's operational stability under strong acid and low flow rate conditions. The device adopts a modular design, which is easy to install and maintain. It has good scalability and versatility, and provides key physical equipment support for the realization of the "one hole, one policy, precise drip irrigation" model for in-situ leaching uranium mining. It has significant technological advancement and application value.

[0056] This application addresses key bottlenecks in current in-situ leaching uranium mining processes, such as homogenized injection parameters, coupled concentration and flow rate control, and significant flow rate decline with increasing formation pressure in the later stages of mining caused by the "flood irrigation" injection mode. It provides an independent acid mixing and regulating device 2 that can be integrated into the branch injection pipe 4. The regulating device 2 achieves independent, high-precision, and dynamic closed-loop control of both acid concentration and injection flow rate by configuring an independent acid mixing unit and an independent supply component 15 at the front end of each branch well. This overcomes the limitations of traditional methods that rely on unified supply from the main system and valve pressure regulation. Especially under conditions of continuously increasing formation pressure in the later stages of mining, the independent supply component 15 provides stable and adjustable pumping power, effectively overcoming the injection difficulties caused by traditional "pressure regulation" methods. Simultaneously, the independent regulating device 2 achieves precise mixing of concentrated sulfuric acid and dilution water, allowing each well to flexibly set the acid concentration according to differences in ore grade and properties, truly realizing a differentiated injection strategy for each well. In addition, the device combines thermal management and corrosion-resistant materials to ensure long-term stable operation of the system under strong acid, high temperature and low flow conditions, providing physical equipment support that can be implemented, replicated and promoted for the intelligent transformation of in-situ leaching uranium mining technology from experience-driven to data and model-driven.

[0057] like Figure 5 As shown, the acid supply method for uranium leaching in this area may also include: First, the flow rate of the main circuit is monitored in real time by a flow sensor on the adsorption tail fluid supply pipe, and the data is transmitted to the remote control system. The control system sets the target injection flow rate and acid pH value for each branch well based on the geological parameters, grade distribution, and historical leaching efficiency of each branch well, combined with a "one well, one policy" algorithm. Subsequently, the system automatically starts the pipeline pumps and acid pumps of each branch well, initiating the injection process.

[0058] During operation, the second flow meter installed at the outlet of each branch injection pipe continuously collects actual flow data and compares it with the set value. If the flow rate deviates from the set range, the remote control system immediately adjusts the frequency converter output of the first pump body of the corresponding regulating device to dynamically adjust the pumping power and achieve closed-loop flow control. At the same time, the system monitors the acidity of the injection acid in real time through a pH sensor. When the pH value is detected to be lower than the set threshold (i.e., "over-acidity"), the control system automatically shuts down the first pump body to prevent local over-acidity from causing ore layer blockage or equipment corrosion, ensuring the safe operation of the system.

[0059] In addition, a second pressure gauge is installed at the outlet of the branch injection pipe to monitor the injection pressure in real time. If the pressure exceeds the preset safety limit (i.e., "overpressure"), the control system will trigger a pressure reduction mechanism, adjusting the pump speed of the second pump or shutting down some branches to avoid pipeline damage. Simultaneously, a temperature sensor is installed at the outlet of the L-shaped nozzle structure to monitor the temperature of the mixed acid solution. When the temperature rise in the downstream pipeline exceeds 20°C, the system automatically reduces the start-stop frequency of the first pump or activates heat dissipation auxiliary measures to prevent heat accumulation. When all key parameters (flow rate, pH, pressure, and temperature) are within the normal range, the control system confirms stable system operation and allows the leaching agent to be delivered to the corresponding injection holes through each branch injection pipe, achieving precise, safe, and controllable injection operations. The entire process can be centrally managed by a remote control system, supporting parameter setting, real-time monitoring, fault alarms, and data traceability, forming a closed-loop control system of "perception-decision-execution-feedback," significantly improving the intelligence and safety of the in-situ leaching uranium mining process.

[0060] In this invention, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0061] In the description of this invention, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0062] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0063] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A device for precise dosing of leaching agent in in-situ uranium leaching, characterized in that, include: Adsorption tail liquid supply pipe; Concentrated acid supply pipe; Multiple branch injection pipes, wherein the multiple branch injection pipes are connected to the adsorption tail fluid supply pipe; Multiple regulating devices are provided, each of the branch injection pipes is provided with a regulating device, the concentrated acid supply pipe is connected to the regulating device, the multiple regulating devices are connected in parallel relative to the concentrated acid supply pipe, and the concentrated acid supply pipe is connected to the branch injection pipe through the regulating device; Multiple supply components are provided, and each of the branch injection pipes is provided with a supply component, which is used to pump the liquid in the adsorbed tail fluid supply pipe to the branch injection pipe.

2. The precise dosing device for uranium leaching acid leaching agent according to claim 1, characterized in that, The regulating device includes: A filter, a first pump body, and a check valve are arranged sequentially along the acid delivery direction on the concentrated acid supply pipe. The check valve only allows concentrated acid to be supplied to the branch injection pipe via the concentrated acid supply pipe.

3. The precise dosing device for uranium leaching acid leaching agent according to claim 2, characterized in that, The regulating device further includes: A first pressure gauge, a first flow meter, and a shut-off valve are arranged along the acid delivery direction on one side of the check valve.

4. The precise dosing device for uranium leaching acid leaching agent according to claim 3, characterized in that, The concentrated acid supply pipe also includes: A mixed acid heat release tube is arranged at the output end of the concentrated acid supply tube. The mixed acid heat release tube is L-shaped, and part of the mixed acid heat release tube is inserted into the branch injection pipe and arranged along the length direction of the branch injection pipe.

5. The precise dosing device for uranium leaching acid leaching agent according to claim 1, characterized in that, The supply components include: A second pump body, a second pressure gauge, and a second flow meter are sequentially arranged on the branch injection pipe along the tail fluid delivery direction. The second flow meter is located on the side of the regulating device close to the adsorption tail fluid supply pipe.

6. The precise dosing device for uranium leaching acid leaching agent according to claim 5, characterized in that, The supply component also includes: A pH sensor and a temperature sensor are arranged at the output end of the branch injection pipe.

7. The precise dosing device for uranium leaching agent in uranium leaching according to any one of claims 1 to 6, characterized in that, Also includes: Control valves are arranged on each of the branch injection pipes; A concentrated acid storage tank, wherein the input end of the concentrated acid supply pipe is connected to the concentrated acid storage tank.

8. A method for supplying acid for in-situ leaching uranium mining, characterized in that, The method for supplying acid solution for uranium mining, applicable to the precise dosing device for acid leaching in uranium mining as described in any one of claims 1 to 7, comprises: Collect mineral information of the ore layer corresponding to each branch injection pipe; Based on the mineral information, determine the acid information required for each branch injection pipe; Based on the acid information, the concentrated acid supply is controlled by the regulating device, and the tail liquid supply is controlled by the supply component to prepare the acid solution. Acid is delivered to the ore formation through the branch injection pipe.

9. The method for supplying acid for in-situ leaching uranium mining according to claim 8, characterized in that, The step of determining the required acid information for each branch injection pipe based on the mineral information includes: Obtain the total amount of useful minerals and permeability coefficient from the mineral information, and determine the acid supply based on the total amount of useful minerals; The total mineral content is positively correlated with the acid supply, while the permeability coefficient is negatively correlated with the acid supply.

10. The method for supplying acid for in-situ leaching uranium mining according to claim 8, characterized in that, The step of determining the acid information required for each branch injection pipe based on the mineral information further includes: Obtain associated state information from mineral information, and determine the concentration of acid solution based on the associated state information.

Images