Portable bag type device and method for electrified leaching of argillaceous sandstone uranium ore

Abstract

The invention relates to the technical field of mining, and discloses a portable bag type device and method for electrified leaching of argillaceous sandstone uranium ore. Wherein a conductive net is attached to the inner wall of the leaching bag, an electrode conductive leakage net barrel is arranged at the center of the leaching bag, and a slag discharging opening is formed in the bottom of the leaching bag in a sealed mode through a threaded cover; the positive electrode connector is connected with the bag wall of the outer side of the leaching bag, and the negative electrode connector is connected with the electrode conductive leakage net cylinder; and the direct-current power supply is connected with the positive electrode connector and the negative electrode connector. According to the method, HCl + FeCl3 is used for activating the leaching agent, the using amount of the leaching agent is small, the uranium element in the ore pulp can only be in the form of UO2 < 2 + > and UO2Cl < + > cations, in this way, the uranium-containing cations can be directionally migrated and leached towards the negative electrode, the leaching agent is collected only through one electrode, the cost is reduced, and the uranium collection rate is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of mining, and particularly to a device and method for portable bag-type electrokinetic leaching of argillaceous sandstone uranium ore. Background Art

[0002] The main carriers of uranium mineralization in uranium deposits are dark mudstone and siltstone, with poor water permeability. It is reported that the permeability coefficient of the ore-bearing aquifer in the Nuheting deposit is 0.0012–0.5 m / d, the water inflow is 0.216–50 t / d, the permeability coefficient is extremely small, and the water-richness is weak. The unfavorable hydrogeological conditions are the decisive factors for the inapplicability of in-situ leaching in this deposit.

[0003] Therefore, it is necessary to design a device and method for portable bag-type electrokinetic leaching of argillaceous sandstone uranium ore with strong practicability. Summary of the Invention

[0004] The purpose of the present invention is to provide a device and method for portable bag-type electrokinetic leaching of argillaceous sandstone uranium ore to solve the problems raised in the above background art.

[0005] To solve the above technical problems, the present invention provides the following technical solutions: A device for portable bag-type electrokinetic leaching of argillaceous sandstone uranium ore, comprising: a leaching bag; wherein, a conductive mesh is attached to the inner wall of the leaching bag, an electrode conductive mesh cylinder is provided at the center of the leaching bag, and a slag discharge port is hermetically provided at the bottom of the leaching bag through a threaded cap; a positive electrode connector and a negative electrode connector, the positive electrode connector is connected to the outer wall of the leaching bag, and the negative electrode connector is connected to the electrode conductive mesh cylinder at the center; a feed hopper for argillaceous sandstone uranium ore slurry and activated leaching agent, which is connected and provided at the opening above the leaching bag; a leachate collection pipe, which is connected and provided at the bottom of the electrode conductive mesh cylinder; a DC power supply, which is connected to the positive electrode connector and the negative electrode connector.

[0006] According to the above technical solution, the leaching bag is a cubic bag structure of 1m×1m×1m, and the center of the leaching bag is a hollow reticular cylindrical shape.

[0007] According to the above technical solution, a feed hopper grid is installed at the bottom of the feed hopper for argillaceous sandstone uranium ore slurry and activated leaching agent.

[0008] According to the above technical solution, a leachate collection pipe valve is provided in the leachate collection pipe.

[0009] In addition to the above technical solutions, the present invention further includes: A method for portable bag-type electrokinetic leaching of argillaceous sandstone uranium ore, comprising the following steps: S1: Put the argillaceous sandstone uranium ore slurry and HCl and FeCl3 activated leaching agent into the leaching bag; S2: Connect the positive electrode connector and the negative electrode connector, turn on the power supply, and activate uranium elements to form UO2 2+ or UO2Cl + Positively charged particles move and accumulate directionally towards the negative electrode made of a perforated cylinder under the action of a DC electric field; S3: After 1 hour of energized leaching, start to open the valve of the leachate collection tube in the leachate collection tube to collect the uranium-containing leachate.

[0010] According to the above technical solution, the HCl is 0.009 L.

[0011] According to the above technical solution, the FeCl3 is 650 g.

[0012] According to the above technical solution, the argillaceous sandstone uranium ore pulp is 1 m 3 .

[0013] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: 1. The device of the present invention is applicable when the on-site demand for treating argillaceous sandstone uranium ore is large. The portable bag-type energized leaching device for argillaceous sandstone uranium ore can be used in parallel in multiple units to improve the treatment efficiency.

[0014] 2. The device in the present invention is easy to transport, can perform on-site extraction for argillaceous sandstone uranium ore with a relatively small mining volume, requiring displacement treatment, and a relatively high water content. It can also facilitate circulation and reuse in multiple places, reducing costs.

[0015] 3. The present invention uses HCl + FeCl3 as the activation leaching agent. Not only is the dosage of the leaching agent small, but it can also make the uranium elements in the ore pulp exist only in the form of cations such as UO2 2+ and UO2Cl + etc. In this way, the uranium-containing cations can migrate and leach directionally towards the negative electrode, and the leachate is collected only at one electrode, reducing costs and also improving the uranium collection rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention, and do not constitute a limitation to the present invention. In the drawings:

[0017] Figure 1 is the front view schematic diagram of the portable bag-type energized leaching device for argillaceous sandstone uranium ore of the present invention; Figure 2 is the top view schematic diagram of the portable bag-type energized leaching device for argillaceous sandstone uranium ore of the present invention.

[0018] In the figure: 1. Leaching bag; 2. Electrode conductive mesh tube; 3. Positive electrode connector; 4. Negative electrode connector; 5. Hopper for muddy sandstone uranium ore pulp and activated leaching agent; 6. Leachate collection pipe; 7. Valve of leachate collection pipe; 8. Slag discharge port; 9. DC power supply; 10. Grid of hopper. Specific implementation mode

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0020] Please refer to Figures 1 to 2 , the present invention provides a technical solution: a device for portable bag-type electro-leaching of muddy sandstone uranium ore, including: Leaching bag 1, the leaching bag 1 is a cubic bag structure of 1m×1m×1m, and the center of the leaching bag 1 is a hollow reticulated cylindrical shape; Among them, the inner wall of the leaching bag 1 is attached with an electrically conductive mesh, an electrode conductive mesh tube 2 is arranged at the center of the leaching bag 1, and a slag discharge port 8 is hermetically arranged at the bottom of the leaching bag 1 through a threaded cover; The bottom of the electrode conductive mesh tube 2 is connected with a leachate collection pipe 6, and a leachate collection pipe valve 7 is arranged in the leachate collection pipe 6; A hopper 5 for muddy sandstone uranium ore pulp and activated leaching agent is threadedly arranged at the opening above the leaching bag 1, and a hopper grid 10 is installed at the bottom of the hopper 5 for muddy sandstone uranium ore pulp and activated leaching agent; Positive electrode connector 3 and negative electrode connector 4, the positive electrode connector 3 is connected to the outer wall of the leaching bag 1, and the negative electrode connector 4 is connected to the electrode conductive mesh tube 2; DC power supply 9, connected to the positive electrode connector 3 and the negative electrode connector 4.

[0021] Embodiment 1: A method for portable bag-type electro-leaching of muddy sandstone uranium ore, including the following steps: S1: By putting 1m 3 Muddy sandstone uranium ore pulp, 650g HCl and 0.009L FeCl3 activated leaching agent into the leaching bag 1, the pH of the reaction system is acidic; S2: The DC power supply 9 is connected to the positive electrode connector 3 and the negative electrode connector 4, the power is turned on, and a DC electric field with a voltage gradient of 4 V / cm is applied to the muddy sandstone uranium ore pulp in the leaching bag 1, and uranium elements are activated to form UO2 2+ Or UO2Cl +Positively charged particles, and these positively charged particles are enriched in the electrode conductive mesh cylinder 2 connected to the negative electrode joint 4 directionally under the action of a DC electric field; S3: After 1 hour of electrified leaching, start to open the leaching solution collection tube valve 7 in the leaching solution collection tube 6 to collect the uranium-containing leaching solution.

[0022] Example 2: A method for portable bag-type electrified leaching of argillaceous sandstone uranium ore, including the following steps: S1: Treat 10 m 3 of argillaceous sandstone uranium ore pulp at the same time, and put 10 parts of 1 m 3 of argillaceous sandstone uranium ore pulp, 650 g of HCl and 0.009 L of FeCl3 activation leaching agent into 10 leaching bags 1 respectively; S2: Connect the positive electrode joint 3 and the negative electrode joint 4 of the 10 leaching bags 1 to a DC power supply 9 respectively, and apply a DC electric field with a voltage gradient of 4 V / cm to the argillaceous sandstone uranium ore pulp in the 10 leaching bags 1 at the same time. The uranium element in the ore pulp forms UO2 2+ and UO2Cl + and other cationic complexes under the action of the activation leaching agent and electrooxidation. These positively charged particles migrate directionally to the electrode conductive mesh cylinder 2 connected to the negative electrode joint 4 under the action of the DC electric field; S3: After 1 hour of electrified leaching of the 10 leaching bags 1, start to open the leaching solution collection tube valve 7 in the leaching solution collection tube 6 to collect the uranium-containing leaching solution.

[0023] In summary, it can be obtained that the argillaceous sandstone uranium ore pulp and the activation leaching agent enter the leaching bag through the argillaceous sandstone uranium ore pulp and activation leaching agent feeding hopper provided with a feeding hopper grid. The feeding hopper grid can intercept large ore blocks and other impurities with a width exceeding 5 cm. The inner side walls of the leaching bag are attached with conductive meshes around, and the center of the leaching bag is penetrated by an electrode conductive mesh cylinder that can conduct electricity, which can prevent large-particle-size mineral particles from passing through the uranium-ion-containing leaching solution. At the same time, the leaching bag is provided with a positive electrode joint and a negative electrode joint, and a DC power supply is connected for electroleaching. By controlling the leaching solution collection tube valve, the uranium-containing leaching solution leached from the electrode conductive mesh cylinder flows out in the leaching solution collection tube. After the electroleaching is completed, the remaining slag is discharged from the slag discharge port at the bottom of the leaching bag.

[0024] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0025] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A device for power-on leaching of argillaceous sandstone uranium ore in a portable bag, characterized in that: Comprising: Leaching bag (1); Wherein, a conductive net is attached to the inner wall of the leaching bag (1), an electrode conductive mesh cylinder (2) is arranged at the center of the leaching bag (1), and a slag discharge port (8) is hermetically arranged at the bottom of the leaching bag (1) through a threaded cover; Positive electrode connector (3) and negative electrode connector (4), the positive electrode connector (3) is connected to the outer bag wall of the leaching bag (1), and the negative electrode connector (4) is connected to the electrode conductive mesh cylinder (2); Slurry of argillaceous sandstone uranium ore and activated leaching agent feeding hopper (5), which is connected and arranged at the opening above the leaching bag (1); Leachate collection pipe (6), which is connected and arranged at the bottom of the electrode conductive mesh cylinder (2); DC power supply (9), which is connected to the positive electrode connector (3) and the negative electrode connector (4).

2. The device for electrified leaching of argillaceous sandstone uranium ore in a portable bag type according to claim 1, wherein: The leaching bag (1) is a cubic bag structure of 1m×1m×1m, and the center of the leaching bag (1) is a hollow net-shaped cylinder.

3. The device for electrochemically leaching argillaceous sandstone uranium ore in a portable bag according to claim 2, wherein: A feeding hopper grid (10) is installed at the bottom of the slurry of argillaceous sandstone uranium ore and activated leaching agent feeding hopper (5).

4. The device for portable bag-type electrokinetic leaching of argillaceous sandstone uranium ore according to claim 3, wherein: A leachate collection pipe valve (7) is arranged in the leachate collection pipe (6).

5. A method for power-on leaching of argillaceous sandstone uranium ore in a portable bag, characterized in that: Including the following steps: S1: By putting the slurry of argillaceous sandstone uranium ore, HCl and FeCl3 activated leaching agent into the leaching bag (1) as described in claim 1; S2: Connect the positive electrode connector (3) and the negative electrode connector (4) to turn on the power supply, and activate uranium elements to form UO2 2+ or UO2Cl + which is positively charged and moves and accumulates directionally towards the negative electrode made of a perforated cylinder under the action of a DC electric field; S3: After 1 h of electrified leaching, start to open the leachate collection pipe valve (7) in the leachate collection pipe (6) to collect the uranium-containing leachate.

6. A method for electrochemically leaching argillaceous sandstone uranium ore in a portable bag, characterized in that: The HCl is 0.009L.

7. A method for electrically leaching argillaceous sandstone uranium ore in a portable bag, according to claim 6, characterized in that: The FeCl3 is 650g.

8. A method for electrokinetic leaching of argillaceous sandstone uranium ore in a portable bag, characterized in that: The argillaceous sandstone uranium ore pulp is 1 m 3 .

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