Device and method for preparing diuranate product from in-situ leaching uranium mining qualified liquid

Abstract

The invention provides a device and method for preparing a diuranate product from in-situ leaching uranium mining qualified liquid, and relates to the technical field of metallurgy, the device comprises a reaction cavity, a discharging port, a stirring structure, a feeding port and an exhaust port, and the reaction cavity is of an inverted triangular pyramid structure; the discharge opening is formed in the bottom of the reaction cavity; the stirring structure is fixedly arranged on the top plane of the reaction cavity; the feeding hole is formed in the top plane of the reaction cavity, and the feeding hole is formed in one side of the stirring structure; the exhaust port is formed in the top plane of the reaction cavity, and the exhaust port is formed in the other side of the stirring structure. All the steps are simplified in one device and automatically completed at a time, the complexity of the process and operation is greatly reduced, and the product quality is improved while the cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of metallurgy, and in particular to a device and a method for preparing a diuranate product from qualified in-situ leaching uranium solution. Background Art

[0002] Diuranate is one of the products of uranium mining and metallurgy in the nuclear industry, and is also an intermediate raw material in the process of producing nuclear power plant fuel. Currently, one of its main production methods is to use the preliminary enriched uranium-containing qualified liquid obtained by acid or neutral leaching of uranium as raw material. However, although the products obtained by the above-mentioned diuranate preparation process can meet the standard requirements, they still have shortcomings such as complex operation, high water content, high reagent consumption, and generation of waste liquid.

[0003] Therefore, it is necessary to invent a device and method for preparing a diuranate product from qualified uranium in situ leaching solution to solve the above-mentioned problems existing in the prior art. Summary of the invention

[0004] The object of the present invention is to provide a device and method for preparing diuranate products from qualified uranium in situ leaching solution to improve the above problems. In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0005] In a first aspect, the present application provides a device for preparing a diuranate product from qualified uranium in situ leaching solution, comprising: a reaction chamber, a discharge port, a stirring structure, a feed port and an exhaust port, wherein the reaction chamber is configured as an inverted triangular pyramid structure; the discharge port is disposed at the bottom of the reaction chamber; the stirring structure is fixedly disposed on the top plane of the reaction chamber; the feed port is disposed on the top plane of the reaction chamber, and the feed port is disposed on one side of the stirring structure; the exhaust port is disposed on the top plane of the reaction chamber, and the exhaust port is disposed on the other side of the stirring structure.

[0006] Optionally, the stirring structure includes a rotation axis, a revolution axis and a stirring rod, the rotation axis is vertically arranged on the top plane of the reaction chamber, the center line of the rotation axis coincides with the center line of the reaction chamber, one end of the revolution axis is connected to the bottom of the rotation axis, and the other end of the revolution axis is connected to the end of the stirring rod, the revolution axis is arranged parallel to the top plane of the reaction chamber, and the stirring rod is arranged parallel to the side wall of the reaction chamber closest to it.

[0007] Optionally, the reaction chamber is provided with two layers, a heating medium is provided between the two layers of the reaction chamber, and the heating medium is silicone oil.

[0008] Optionally, an observation port and a sampling port are provided on the side wall of the reaction chamber, the observation port and the sampling port are both sealed, and the observation port is made of a transparent material.

[0009] In a second aspect, the present application also provides a method for preparing a diuranate product from qualified uranium in situ leaching solution, comprising:

[0010] Testing the qualified in situ leaching uranium solution and determining the type of the qualified in situ leaching uranium solution;

[0011] If the type of the qualified in situ leaching uranium solution is the acidic in situ leaching uranium qualified solution, the qualified solution and the sodium hydroxide solution with a preset content are added into the reaction chamber of the device for preparing the diuranate product;

[0012] Controlling a stirring structure of the device for preparing the diuranate product to stir until the slurry in the reaction chamber is stirred evenly and the pH value reaches a preset first threshold value;

[0013] Heating the heating medium in the reaction chamber and extracting steam from the reaction chamber through the exhaust port using a vacuum pump;

[0014] A sample obtained by the reaction is obtained from the sampling port. If the uranium content in the sample is greater than or equal to the preset threshold and the moisture content is less than or equal to the preset threshold, the stirring, heating and steam extraction operations are stopped, and the slurry obtained by the reaction is loaded into the product barrel from the discharge port.

[0015] Optionally, after testing the qualified in situ leaching uranium solution and determining the type of the qualified in situ leaching uranium solution, the method further includes:

[0016] If the type of the qualified in situ leaching uranium solution is a neutral qualified in situ leaching uranium solution, the qualified solution is added to the reaction chamber of the device for preparing the diuranate product, and a preset content of industrial hydrochloric acid is added until the pH value of the slurry in the reaction chamber reaches a preset second threshold value;

[0017] Open the exhaust port at the top of the reaction chamber to discharge the gas generated in the reaction chamber, add a preset content of sodium hydroxide solution, and control the stirring structure of the device for preparing the diuranate product to stir until the slurry in the reaction chamber is stirred evenly and the pH value reaches a preset third threshold value;

[0018] Heating the heating medium in the reaction chamber and extracting steam from the reaction chamber through the exhaust port using a vacuum pump;

[0019] A sample obtained by the reaction is obtained from the sampling port. If the uranium content in the sample is greater than or equal to the preset threshold and the moisture content is less than or equal to the preset threshold, the stirring, heating and steam extraction operations are stopped, and the slurry obtained by the reaction is loaded into the product barrel from the discharge port.

[0020] Optionally, controlling a stirring structure of the device for preparing the diuranate product to stir until the slurry in the reaction chamber is stirred uniformly and the pH value reaches a preset first threshold value comprises:

[0021] The rotating shaft of the stirring structure is controlled to rotate at a speed of 6 r / min, and the slurry sample in the reaction chamber is collected from the sampling port in real time for pH value detection until the pH value of the slurry sample is between 7.2 and 7.5.

[0022] Optionally, the step of adding a preset amount of industrial hydrochloric acid until the pH value of the slurry in the reaction chamber reaches a preset second threshold value comprises:

[0023] Industrial hydrochloric acid with a preset content is added into the reaction chamber in stages, and slurry samples in the reaction chamber are collected from the sampling port in real time for pH value detection until the pH value of the slurry sample reaches 4.6.

[0024] Optionally, the step of stirring the slurry in the reaction chamber until the slurry is uniformly stirred and the pH value reaches a preset third threshold value includes:

[0025] The rotating shaft of the stirring structure is controlled to rotate at a speed of 6 r / min, and the slurry sample in the reaction chamber is collected from the sampling port in real time for pH value detection until the pH value of the slurry sample reaches 13.

[0026] Optionally, the heating operation of the heating medium in the reaction chamber and the extraction of steam from the reaction chamber through the exhaust port using a vacuum pump include:

[0027] The heating device is used to heat the heating medium in the reaction chamber, wherein the temperature in the reaction chamber is controlled to be between 60°C and 80°C;

[0028] Connect one end of the vacuum pump to the exhaust port, and the other end of the vacuum pump to the condenser;

[0029] The vacuum pump is controlled to extract steam from the reaction chamber until the vacuum degree in the reaction chamber is -0.05 MPa, wherein the steam extracted by the vacuum pump is liquefied and recovered through a condenser.

[0030] The beneficial effects of the present invention are:

[0031] The preparation method of the diuranate of the present invention does not have separate precipitation, crystallization aging, and clear liquid separation steps, nor does it require the transportation and transfer of slurry and solid-liquid separation. It only needs to add materials in sequence, and all steps are simplified to one device and automatically completed at one time, which greatly reduces the complexity of the process and operation; compared with the space occupied by equipment such as a precipitation tank, an aging tank, a plate and frame filter press, and connecting pipelines in the original process, the present invention has only one main device, and the space occupied is significantly reduced; the present invention reduces the water content of the diuranate from 20 to 30% to less than 5%, greatly reduces the water content, relatively increases the content of the target component, increases the uranium content from 50% to 70%, and other impurity components remain basically unchanged, the product quality is improved, and it is more conducive to the production of subsequent steps; a small amount of CO2 generated by the preparation method of the present invention can be recovered by alkali solution or directly discharged, and the steam condensed water generated in the evaporation process can be recycled.

[0032] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or be understood by implementing the embodiments of the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description, claims, and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0034] Figure 1 It is a schematic diagram of the structure of the device for preparing diuranate product from qualified uranium in situ leaching solution described in an embodiment of the present invention;

[0035] Figure 2 The present invention is a schematic flow chart of a method for preparing a diuranate product from qualified in-situ leaching uranium solution according to an embodiment of the present invention.

[0036] In the figure: 1. reaction chamber; 2. discharge port; 3. feed port; 4. exhaust port; 5. rotation axis; 6. revolution axis; 7. stirring rod; 8. heating medium; 9. observation port; 10. sampling port. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0038] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. At the same time, in the description of the present invention, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0039] Embodiment 1:

[0040] See also Figure 1 The present embodiment provides a device for preparing a diuranate product from qualified uranium in situ leaching solution, comprising: a reaction chamber 1, a discharge port 2, a stirring structure, a feed port 3 and an exhaust port 4, wherein the reaction chamber 1 is configured as an inverted triangular pyramid structure; the discharge port 2 is disposed at the bottom of the reaction chamber 1; the stirring structure is fixedly disposed on the top plane of the reaction chamber 1; the feed port 3 is disposed on the top plane of the reaction chamber 1, and the feed port 3 is disposed on one side of the stirring structure; the exhaust port 4 is disposed on the top plane of the reaction chamber 1, and the exhaust port 4 is disposed on the other side of the stirring structure.

[0041] The invention provides a novel device for preparing diuranate products, so that in the process of preparing diuranate products, there are no separate precipitation, crystallization aging, clear liquid separation steps, and no slurry transportation transfer and solid-liquid separation, and only materials need to be added in sequence, and all steps are simplified to one device and automatically completed at one time, thereby greatly reducing the complexity of the process and operation; compared with the space occupied by equipment such as a precipitation tank, an aging tank, a plate and frame filter press and connecting pipelines in the original process, the invention has only one main device, and the space occupied is significantly reduced; the invention reduces the water content of diuranate from 20 to 30% to less than 5%, greatly reduces the water content, relatively increases the content of target components, increases the uranium content from 50% to 70%, and other impurity components remain basically unchanged, thereby improving the product quality and being more conducive to the production of subsequent steps; a small amount of CO2 generated by the preparation method of the invention can be recovered by alkali solution or directly discharged, and the steam condensed water generated in the evaporation process can be recycled.

[0042] Among them, the stirring structure includes a rotation axis 5, a revolution axis 6 and a stirring rod 7, the rotation axis 5 is vertically arranged on the top plane of the reaction chamber 1, the center line of the rotation axis 5 coincides with the center line of the reaction chamber 1, one end of the revolution axis 6 is connected to the bottom of the rotation axis 5, and the other end of the revolution axis 6 is connected to the end of the stirring rod 7, the revolution axis 6 is arranged parallel to the top plane of the reaction chamber 1, and the stirring rod 7 is arranged parallel to the side wall of the reaction chamber 1 closest to it.

[0043] The design of the rotation axis 5 and the revolution axis 6 in the present invention makes the stirring more uniform, which helps to improve the rate and efficiency of the chemical reaction. The parallel arrangement of the stirring rod 7 helps to prevent the deposition of materials on the reaction chamber wall, keep the reaction chamber clean, and reduce maintenance costs. The vertical and parallel arrangement of the rotation axis 5 and the revolution axis 6 ensures the stability and durability of the entire stirring structure.

[0044] The reaction chamber 1 is provided with two layers, and a heating medium 8 is provided between the two layers of the reaction chamber 1, and the heating medium 8 is silicone oil.

[0045] The present invention uses a double-layer structure and a heating medium 8 to help achieve a more uniform temperature distribution inside the reaction chamber 1. By accurately controlling the temperature through the heating medium 8, the rate and efficiency of the chemical reaction can be increased, thereby improving production efficiency. Controlling the reaction temperature can prevent overheating or low temperature, thereby reducing safety risks. In addition to silicone oil, water can also be used as the heating medium in the present invention.

[0046] An observation port 9 and a sampling port 10 are provided on the side wall of the reaction chamber 1 . Both the observation port 9 and the sampling port 10 are sealed. The observation port 9 is made of a transparent material.

[0047] The present invention allows the operator to monitor the reaction process in real time through the observation port 9, and promptly discover and handle abnormal situations. The sampling port 10 allows sampling without damaging the sealing of the reaction chamber, thereby improving the safety of the operation. The sealing setting helps to keep the internal environment of the reaction chamber clean and prevent external pollutants from affecting the reaction.

[0048] Embodiment 2:

[0049] like Figure 2 As shown, this embodiment provides a method for preparing a diuranate product from qualified uranium in situ leaching solution, and the method includes step S1, step S2, step S3, step S4 and step S5.

[0050] Step S1, testing the qualified in situ leaching uranium solution and determining the type of the qualified in situ leaching uranium solution;

[0051] It is understandable that in this step, qualified liquid suitable for preparing diuranate can be screened out through testing, thereby avoiding the influence of unqualified raw materials on the production process.

[0052] Wherein, after step S1, the method further includes step S11, step S12, step S13 and step S14.

[0053] Step S11, if the type of the qualified in situ leaching uranium solution is a neutral qualified in situ leaching uranium solution, adding the qualified solution into the reaction chamber of the device for preparing the diuranate product, and adding a preset content of industrial hydrochloric acid until the pH value of the slurry in the reaction chamber reaches a preset second threshold value;

[0054] Wherein, step S11 includes step S111.

[0055] Step S111, adding a preset content of industrial hydrochloric acid into the reaction chamber in stages, and collecting slurry samples in the reaction chamber from the sampling port in real time for pH value detection until the pH value of the slurry sample reaches 4.6.

[0056] It is understood that the pH value can be accurately controlled within the desired range by adding industrial hydrochloric acid in stages and real-time monitoring in this step. Accurate control of the pH value helps to optimize the precipitation reaction of uranium and improve product purity and yield. It also avoids excessively high or low pH values ​​and reduces possible side reactions, such as corrosion of equipment or generation of undesirable by-products.

[0057] Step S12, opening the exhaust port at the top of the reaction chamber to exhaust the gas generated in the reaction chamber, adding a preset content of sodium hydroxide solution, and controlling the stirring structure of the device for preparing the diuranate product to stir until the slurry in the reaction chamber is stirred evenly and the pH value reaches a preset third threshold value;

[0058] Wherein, step S12 includes step S121.

[0059] Step S121, controlling the rotation axis of the stirring structure to rotate at a speed of 6 r / min, and collecting slurry samples in the reaction chamber from the sampling port in real time for pH value detection until the pH value of the slurry sample reaches 13.

[0060] It can be understood that in this step, the rotating shaft rotates at a speed of 6 r / min. This moderate speed can ensure uniform mixing of the slurry, while avoiding the mechanical shear force that may be caused by excessive stirring speed, and controlling the pH value at 13, which helps to promote the dissolution and precipitation reaction of uranium.

[0061] Step S13, heating the heating medium in the reaction chamber and extracting steam from the reaction chamber through the exhaust port using a vacuum pump;

[0062] Step S14, obtaining a sample obtained by the reaction from the sampling port. If the uranium content in the sample is greater than or equal to a preset threshold and the moisture content is less than or equal to a preset threshold, the stirring, heating and steam extraction operations are stopped, and the slurry obtained by the reaction is loaded into a product barrel from the discharge port.

[0063] It is understood that the above steps prepare for subsequent chemical reactions by adding the neutral leached uranium qualified solution as raw material into the reaction chamber. Ensure that there are enough raw materials in the reaction chamber for subsequent chemical reactions. Then, by adding industrial hydrochloric acid, adjust the pH value of the slurry in the reaction chamber to the preset second threshold value to create suitable acid-base conditions for subsequent reactions. Then ensure that the reaction proceeds in the direction of generating diuranate.

[0064] Step S2: if the qualified in situ leaching uranium solution is an acidic in situ leaching uranium qualified solution, adding the qualified solution and a sodium hydroxide solution with a preset content into a reaction chamber of a device for preparing a diuranate product;

[0065] It can be understood that in this step, the acidic substance neutralized by adding sodium hydroxide is promoted to precipitate or dissolve uranium, so as to prepare for the subsequent reaction.

[0066] Step S3, controlling the stirring structure of the device for preparing the diuranate product to stir until the slurry in the reaction chamber is stirred evenly and the pH value reaches a preset first threshold value;

[0067] It is understood that this step ensures that the reactants are mixed evenly and the pH value reaches a range suitable for the formation of diuranate. Among them, the uniform mixing helps to improve the reaction efficiency, and the control of the pH value ensures that the reaction is carried out under optimal conditions.

[0068] Wherein, step S3 includes step S31.

[0069] Step S31, control the rotating shaft of the stirring structure to rotate at a speed of 6 r / min, and collect slurry samples in the reaction chamber from the sampling port in real time for pH value detection until the pH value of the slurry sample is between 7.2 and 7.5.

[0070] It is understood that in this step, the rotation speed is set to ensure that the slurry components in the reaction chamber are evenly mixed to improve the reaction efficiency. By monitoring the pH value in real time, the reaction conditions can be accurately controlled to avoid overreaction or insufficient reaction. Controlling the pH value between 7.2 and 7.5 helps to form an ideal diuranate precipitation and improve product quality.

[0071] Step S4, heating the heating medium in the reaction chamber and extracting steam from the reaction chamber through the exhaust port using a vacuum pump;

[0072] It can be understood that this step provides the energy required for the reaction by heating, and removes excess water and volatile impurities by steam extraction. In addition, heating accelerates the chemical reaction rate, and steam extraction helps to concentrate the reactants and improve the purity of the product. In this step, step S4 includes step S41, step S42 and step S43.

[0073] Step S41, heating the heating medium of the reaction chamber using a heating device, wherein the temperature in the reaction chamber is controlled to be between 60° C. and 80° C.;

[0074] Step S42, docking one end of the vacuum pump with the exhaust port, and docking the other end of the vacuum pump with the condenser;

[0075] Step S43, controlling the vacuum pump to extract steam from the reaction chamber until the vacuum degree in the reaction chamber is -0.05 MPa, wherein the steam extracted by the vacuum pump is liquefied and recovered through a condenser.

[0076] It is understood that this step ensures that the reaction is carried out within the optimal temperature range by controlling the temperature of the reaction chamber between 60°C and 80°C, avoiding excessively high or low temperatures that affect the reaction efficiency or product quality. The docking of the vacuum pump and the condenser can effectively extract the steam in the reaction chamber during the heating process, reduce the pressure, and promote the precipitation of uranium. Extracting steam through a vacuum pump can reduce the pressure in the reaction chamber, while condensing and recovering steam can reduce resource waste and achieve recycling.

[0077] Step S5, obtaining a sample obtained by the reaction from the sampling port. If the uranium content in the sample is greater than or equal to a preset threshold or the moisture content is less than or equal to a preset threshold, the stirring, heating and steam extraction operations are stopped, and the slurry obtained by the reaction is loaded into a product barrel from the discharge port.

[0078] It is understood that in this step, sampling and testing are performed to determine whether the reaction is complete, and the diuranate product that meets the standards is collected to ensure that the collected product meets the quality and content requirements and avoids collecting unqualified products.

[0079] It should be noted that, regarding the device in the above embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment of the method, and will not be elaborated here.

[0080] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0081] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A device for preparing diuranate products from qualified uranium in situ leaching solution, characterized in that: include: A reaction chamber (1), wherein the reaction chamber (1) is configured as an inverted triangular pyramid structure; A discharge port (2), the discharge port (2) being arranged at the bottom of the reaction chamber (1); A stirring structure, wherein the stirring structure is fixedly arranged on the top plane of the reaction chamber (1); A feed inlet (3), the feed inlet (3) being arranged on the top plane of the reaction chamber (1), and the feed inlet (3) being arranged on one side of the stirring structure; An exhaust port (4), the exhaust port (4) being arranged on the top plane of the reaction chamber (1), and the exhaust port (4) being arranged on the other side of the stirring structure.

2. The device for preparing diuranate product from qualified uranium in situ leaching solution according to claim 1, characterized in that , comprising: the stirring structure comprises a rotation axis (5), a revolution axis (6) and a stirring rod (7), the rotation axis (5) is vertically arranged on the top plane of the reaction chamber (1), the center line of the rotation axis (5) coincides with the center line of the reaction chamber (1), one end of the revolution axis (6) is connected to the bottom of the rotation axis (5), the other end of the revolution axis (6) is connected to the end of the stirring rod (7), the revolution axis (6) is arranged parallel to the top plane of the reaction chamber (1), and the stirring rod (7) is arranged parallel to the side wall of the reaction chamber (1) closest to it.

3. The device for preparing diuranate product from qualified uranium in situ leaching solution according to claim 1, characterized in that ,include: The reaction chamber (1) is provided with two layers, a heating medium (8) is provided between the two layers of the reaction chamber (1), and the heating medium (8) is silicone oil.

4. The device for preparing diuranate product from qualified uranium in situ leaching solution according to claim 1, characterized in that ,include: An observation port (9) and a sampling port (10) are provided on the side wall of the reaction chamber (1); the observation port (9) and the sampling port (10) are both sealed; and the observation port (9) is made of a transparent material.

5. A method for preparing a diuranate product from qualified uranium in situ leaching solution, characterized in that: include: Testing the qualified in situ leaching uranium solution and determining the type of the qualified in situ leaching uranium solution; If the type of the qualified in situ leaching uranium solution is the acidic in situ leaching uranium qualified solution, the qualified solution and the sodium hydroxide solution with a preset content are added into the reaction chamber of the device for preparing the diuranate product; Controlling a stirring structure of the device for preparing the diuranate product to stir until the slurry in the reaction chamber is stirred evenly and the pH value reaches a preset first threshold value; Heating the heating medium in the reaction chamber and extracting steam from the reaction chamber through the exhaust port using a vacuum pump; A sample obtained by the reaction is obtained from the sampling port. If the uranium content in the sample is greater than or equal to the preset threshold and the moisture content is less than or equal to the preset threshold, the stirring, heating and steam extraction operations are stopped, and the slurry obtained by the reaction is loaded into the product barrel from the discharge port.

6. The method for preparing a diuranate product from qualified in-situ leaching uranium solution according to claim 5, characterized in that: After testing the qualified in-situ leaching uranium solution and determining the type of the qualified in-situ leaching uranium solution, the method further comprises: If the type of the qualified in situ leaching uranium solution is a neutral qualified in situ leaching uranium solution, the qualified solution is added into the reaction chamber of the device for preparing the diuranate product, and a preset content of industrial hydrochloric acid is added until the pH value of the slurry in the reaction chamber reaches a preset second threshold value; Open the exhaust port at the top of the reaction chamber to discharge the gas generated in the reaction chamber, add a preset content of sodium hydroxide solution, and control the stirring structure of the device for preparing the diuranate product to stir until the slurry in the reaction chamber is stirred evenly and the pH value reaches a preset third threshold value; Heating the heating medium in the reaction chamber and extracting steam from the reaction chamber through the exhaust port using a vacuum pump; A sample obtained by the reaction is obtained from the sampling port. If the uranium content in the sample is greater than or equal to the preset threshold and the moisture content is less than or equal to the preset threshold, the stirring, heating and steam extraction operations are stopped, and the slurry obtained by the reaction is loaded into the product barrel from the discharge port.

7. The method for preparing a diuranate product from qualified in-situ leaching uranium solution according to claim 5, characterized in that: The method of controlling the stirring structure of the device for preparing the diuranate product to stir until the slurry in the reaction chamber is stirred uniformly and the pH value reaches a preset first threshold value includes: The rotating shaft of the stirring structure is controlled to rotate at a speed of 6 r / min, and the slurry sample in the reaction chamber is collected from the sampling port in real time for pH value detection until the pH value of the slurry sample is between 7.2 and 7.

5.

8. The method for preparing a diuranate product from qualified in-situ leaching uranium solution according to claim 6, characterized in that: The step of adding a preset amount of industrial hydrochloric acid until the pH value of the slurry in the reaction chamber reaches a preset second threshold value comprises: Industrial hydrochloric acid with a preset content is added into the reaction chamber in stages, and slurry samples in the reaction chamber are collected from the sampling port in real time for pH value detection until the pH value of the slurry sample reaches 4.

6.

9. The method for preparing a diuranate product from qualified in-situ leaching uranium solution according to claim 6, characterized in that: The stirring process until the slurry in the reaction chamber is uniform and the pH value reaches a preset third threshold value includes: The rotating shaft of the stirring structure is controlled to rotate at a speed of 6 r / min, and the slurry sample in the reaction chamber is collected from the sampling port in real time for pH value detection until the pH value of the slurry sample reaches 13.

10. The method for preparing diuranate products from qualified in-situ leaching uranium solution according to claim 5, characterized in that: The heating operation of the heating medium in the reaction chamber and the steam extraction operation of the reaction chamber from the exhaust port using a vacuum pump include: The heating device is used to heat the heating medium in the reaction chamber, wherein the temperature in the reaction chamber is controlled to be between 60°C and 80°C; Connect one end of the vacuum pump to the exhaust port, and the other end of the vacuum pump to the condenser; The vacuum pump is controlled to extract steam from the reaction chamber until the vacuum degree in the reaction chamber is -0.05 MPa, wherein the steam extracted by the vacuum pump is liquefied and recovered through a condenser.

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