Device and method for groove type electrified leaching of argillaceous sandstone uranium ore

Abstract

The invention relates to the technical field of mining, and discloses a device and method for leaching argillaceous sandstone uranium ore in a groove type electrified mode. The leaching tank component comprises a positive electrode, a negative electrode, an anode chamber, a cathode chamber, an anode filter membrane, a cathode filter membrane and a stirring and crushing wheel, the positive electrode is installed in the anode chamber and fixedly installed on the inner wall of the leaching tank, the negative electrode is installed in the cathode chamber and fixedly installed on the inner wall of the leaching tank; a feeding part; the feeding component comprises a feeding pipe, an electric draw-off pump and a feeding pipe valve. The concentrated hydrochloric acid and the ferric chloride are used for activating the leaching agent, the using amount of the leaching agent is small, the uranium element in the ore pulp can only store UO2 < 2 + >, UO2Cl < + > and other positive ions, therefore, the positive ions containing uranium can be directionally migrated and leached towards the negative electrode, all uranium can be collected only when the positive ions containing uranium are used in the cathode chamber, and the activating leaching agent is small in environmental pollution and free of secondary pollution. And the leached slag is convenient to directly backfill.

Description

Technical Field

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

[0002] The Nuheting uranium deposit is the first super-large synsedimentary mudstone-type uranium deposit in China. The main carriers of uranium mineralization in this uranium deposit are dark mudstone and siltstone. Due to the hydrogeological conditions, in-situ leaching is not applicable to this deposit. Stirring leaching has a higher leaching rate compared to traditional heap leaching technology. However, the existing stirring leaching methods face problems such as high ore crushing costs, difficult solid-liquid separation after the leaching reaction is completed, and high consumption of leaching agents.

[0003] Therefore, it is necessary to design a device and method for trough-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 trough-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 a device for trough-type electrokinetic leaching of argillaceous sandstone uranium ore, including: A leaching trough component; the leaching trough component includes: a positive electrode, a negative electrode, an anode chamber, a cathode chamber, an anode filter membrane, a cathode filter membrane, and a stirring and crushing wheel. The positive electrode is installed in the anode chamber and is fixedly installed on the inner wall of the leaching trough. The negative electrode is installed in the cathode chamber and is fixedly installed on the inner wall of the leaching trough; A feeding component; the feeding component includes: a feeding pipe, an electric extraction pump, and a feeding pipe valve. The feeding pipe valve is installed in the feeding pipe. There are multiple openings below the feeding pipe as the discharge ports for the slurry in the feeding pipe; A discharging component; the discharging component includes: a telescopic discharging plate, a filter residue conveyor belt, and a leaching solution discharge pipe. The telescopic discharging plate is installed at the bottom of the leaching trough through a rubber diaphragm. There is an opening below the telescopic discharging plate on the side close to the cathode filter membrane of the cathode chamber. The filter residue conveyor belt is located below the opening. The leaching solution discharge pipe is communicated with the leaching trough, and a leaching solution discharge port valve is installed at the connection between the leaching solution discharge pipe and the leaching trough.

[0006] Preferably, the number of the stirring and crushing wheels in the above leaching device is multiple, and the multiple stirring and crushing wheels are distributed in the crushing and activation chamber.

[0007] Preferably, the leaching trough in the above leaching device is a cuboid trough structure, and the maximum one-time processing capacity can reach 10m 3 .

[0008] Preferably, the volume of the leaching tank in the above-mentioned leaching device is 3.3 m × 1.8 m × 1.7 m.

[0009] The present invention also provides a more excellent leaching device, which further includes a power control component. The power control component is fixedly installed on the outer side wall of the cathode chamber of the leaching tank. The power control component includes a power supply, and the power supply has a power external interface and a power button. The power circuit is connected to control the power control component, including switches of electrodes and stirring and crushing wheels in the leaching tank, switches of telescopic discharge plates and slag conveyor belts, and switches of electric extraction pumps of feeding pipes.

[0010] Preferably, the control of the telescopic discharge plate in the above-mentioned leaching device is electrically opened and closed. More preferably, one end of the telescopic discharge plate close to the slag conveyor belt is set to be openable and closable, and the corresponding other side is connected to the bottom of the leaching tank and is rotatable.

[0011] The present invention also provides a method for trough-type electrified leaching of argillaceous sandstone uranium ore according to the above device, including the following steps: S1: Turn on the power supply to turn on the stirring and crushing wheel, and at the same time set the rotation speed of the stirring and crushing wheel to 200 r / min; S2: Put 10 m 3 argillaceous sandstone uranium ore pulp, ferric chloride and hydrochloric acid into the crushing and activation chamber of the leaching tank, and adjust the pH of the reaction system to 4 ± 0.1; S3: After stirring for 30 min, adjust the rotation speed to 10 r / min, turn on the power supply of the positive electrode, set the voltage gradient in the leaching tank to 1 V / cm, and start electrified leaching; S4: After 10 min of electrification time, open the valve of the leachate discharge port to start collecting uranium-containing leachate. After the leachate has flowed out, turn off the stirring and crushing wheel and the power supply; S5: Turn on the switches of the slag conveyor belt and the telescopic discharge plate to collect the slag.

[0012] Preferably, the ferric chloride in the above-mentioned leaching method is solid ferric chloride, and the dosage is 6500 g; the hydrochloric acid is concentrated hydrochloric acid with a mass fraction of 36% - 38%, and the dosage is 0.09 L.

[0013] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: 1. The present invention can reduce the use of leaching agents, quickly process a large amount of argillaceous sandstone uranium ore pulp, carry out solid-liquid separation of uranium-containing leachate and slag, and improve the leaching efficiency.

[0014] 2. The device for trough-type electrified leaching of argillaceous sandstone uranium ore of the present invention has a suitable volume, is easy to transport, and can quickly process a large amount of argillaceous sandstone uranium ore at the mining site.

[0015] 3. Using concentrated hydrochloric acid and ferric chloride solid as the activated leaching agent not only reduces the dosage of the leaching agent, but also enables the uranium element in the pulp to exist only in the form of cations such as UO2 2+ , UO2Cl + etc. In this way, the uranium-containing cations can migrate and leach towards the negative electrode directionally, and all the uranium can be collected only in the cathode chamber, simplifying the treatment process. Using this activated leaching agent causes little environmental pollution, and the slag after leaching is convenient for direct backfilling. 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 a front view structural schematic diagram of a device and method for electrochemically leaching argillaceous sandstone uranium ore according to the present invention.

[0018] In the figure: 1. Positive electrode; 2. Negative electrode; 3. Anode chamber; 4. Cathode chamber; 5. Anode filter membrane; 6. Cathode filter membrane; 7. Stirring and crushing wheel; 8. Crushing and activation chamber; 9. Feeding pipe; 10. Feeding pipe valve; 11. Pulp discharge port of the feeding pipe; 12. Electric extraction pump; 13. Telescopic discharge plate; 14. Opening; 15. Filter residue conveyor belt; 16. Leaching solution discharge pipe; 17. Leaching solution discharge port valve; 18. Power supply; 19. External power supply interface; 20. Power button. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] Hereinafter, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the 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. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0020] Please refer to Figure 1 , the present invention provides a technical solution: a device for electrochemically leaching argillaceous sandstone uranium ore in a tank, comprising: Leaching tank components; The leaching tank components include: a positive electrode 1, a negative electrode 2, an anode chamber 3, a cathode chamber 4, an anode filter membrane 5, a cathode filter membrane 6, and a stirring and crushing wheel 7. The positive electrode 1 is installed in the anode chamber 3 and is fixedly installed on the inner wall of the leaching tank. The leaching tank is a cuboid tank structure with a volume of about 3.3m×1.8m×1.7m, and the maximum one-time processing capacity can reach 10m 3, the negative electrode 2 is installed in the cathode chamber 4 and is fixedly mounted on the inner wall of the leaching tank. The number of stirring and crushing wheels 7 is multiple, and the multiple stirring and crushing wheels 7 are distributed in the crushing and activation chamber 8. The installation quantity and height of the stirring and crushing wheels can be adjusted according to the processing capacity; Here, between the cathode chamber 4 and the crushing and activation chamber 8 of the leaching tank, and between the anode chamber 3 and the crushing and activation chamber 8, large-particle-size mineral particles are isolated by the anode filter membrane 5 and the cathode filter membrane 6; Feeding component; The feeding component includes: a feeding pipe 9, an electric extraction pump 12, and a feeding pipe valve 10. The feeding pipe valve 10 is installed in the feeding pipe 9, and a plurality of slurry discharge ports 11 of the feeding pipe are arranged on the lower surface of the feeding pipe 9; Here, the feeding pipe 9 is used to extract the argillaceous sandstone uranium ore slurry, and the feeding pipe valve 10 can control the flow rate of the slurry.

[0021] Discharging component; The discharging component includes: a telescopic discharging plate 13, a filter residue conveyor belt 15, and a leaching solution discharge pipe 16. The telescopic discharging plate 13 is installed at the bottom of the leaching tank through a rubber diaphragm. There is an opening 14 on the lower side of the telescopic discharging plate 13 near the cathode filter membrane 6 of the cathode chamber 4 that can be mechanically controlled to open and close for discharging filter residue. The filter residue conveyor belt 15 is located below the opening 14. The leaching solution discharge pipe 16 is communicated with the leaching tank, and a leaching solution discharge port valve 17 for controlling the flow rate of the leaching solution is installed at the connection between the leaching solution discharge pipe 16 and the leaching tank.

[0022] It also includes a power control component. The power control component includes a power supply 18 fixedly installed on the outer side wall of the cathode chamber 4 of the leaching tank. The power supply 18 has a power external interface 19 and a power button 20. The power supply 18 is electrically connected to control the power control component, including switches for the electrodes and stirring and crushing wheels in the leaching tank, switches for the telescopic discharging plate and the filter residue conveyor belt, and a switch for the electric extraction pump of the feeding pipe. Among them, the control of the telescopic discharging plate can be set to be electrically opened and closed. As Figure 1 shown, one end of the telescopic discharging plate close to the filter residue conveyor belt 15 is set to be openable and closable, and the corresponding other side is connected to the bottom of the leaching tank and can rotate; Here, the power supply 18 provides a direct current electric field for the leaching tank. The positive electrode 1 is in the anode chamber 3, and the negative electrode 2 is in the cathode chamber 4. After the power supply is turned on, UO2 2+ or UO2Cl + and other uranium-containing particles with positive charges in the leaching and activation chamber are directionally electro-migrated and enriched in the cathode chamber 4 near the cathode under the action of the electric field.

[0023] In addition to the above technical solutions, it also includes: a method for leaching argillaceous sandstone uranium ore by slot-type energization, which is characterized in that it includes the following steps: S1: Turn on power supply 18 to activate the stirring and crushing wheel 7, and set the rotation speed of the stirring and crushing wheel 7 to 200 r / min; S2: Put 10 m 3 argillaceous sandstone uranium pulp, 6500 g of solid ferric chloride, and 0.09 L of concentrated hydrochloric acid (mass fraction 36% - 38%) into the crushing and activation chamber 8 of the leaching tank, and adjust the pH of the reaction system to 4 ± 0.1; S3: After stirring for 30 min, adjust the rotation speed to 10 r / min, turn on the power supply of the positive electrode, set the voltage gradient in the leaching tank to 1 V / cm, and start the electrodeposition leaching; S4: After 10 min of electrification time, open the valve 17 of the leachate discharge port to start collecting the uranium-containing leachate. After the leachate has flowed out completely, turn off the stirring and crushing wheel 7 and the power supply 18; S5: Turn on the switches of the filter residue conveyor belt 15 and the telescopic discharge plate 13 to collect the filter residue.

[0024] In summary: After turning on the power supply, positively charged uranium-containing particles such as UO2 2+ or UO2Cl + are directionally electromigrated and enriched in the cathode chamber near the cathode under the action of the electric field. The cathode chamber of the leaching tank is separated from the crushing and activation chamber, and the anode chamber and the crushing and activation chamber are separated by filter membranes to block large-particle minerals. By controlling the valve of the leachate discharge port with adjustable flow rate, the uranium-containing leachate enriched in the cathode chamber is discharged and collected through the leachate discharge pipe. After the electrodeposition extraction of the argillaceous sandstone uranium pulp in the leaching tank is completed and the leachate is discharged and collected, open the opening of the telescopic discharge plate at the bottom of the leaching tank, and discharge the remaining slag from the bottom of the leaching tank to the conveyor belt placed below the leaching tank.

[0025] It should be noted that in this article, 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 term "comprising", "including" or any other variation thereof is 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 elements inherent to such process, method, article or device.

[0026] 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 modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An apparatus for slot-type electrokinetic leaching of argillaceous sandstone uranium ore, characterized in that: Including: Leaching tank component; The leaching tank component includes: positive electrode (1), negative electrode (2), anode chamber (3), cathode chamber (4), anode filter membrane (5), cathode filter membrane (6), stirring and crushing wheel (7). The positive electrode (1) is installed in the anode chamber (3) and is fixedly installed on the inner wall of the leaching tank. The negative electrode (2) is installed in the cathode chamber (4) and is fixedly installed on the inner wall of the leaching tank; Feeding component; The feeding component includes: feeding pipe (9), electric extraction pump (12), feeding pipe valve (10). The feeding pipe valve (10) is installed in the feeding pipe (9). There are multiple openings below the feeding pipe (9) as the pulp discharge ports (11) of the feeding pipe; Discharging component; The discharging component includes: telescopic discharging plate (13), filter residue conveyor belt (15), leaching solution discharge pipe (16). The telescopic discharging plate (13) is installed at the bottom of the leaching tank through a rubber diaphragm. An opening (14) is provided below the telescopic discharging plate (13) on the side close to the cathode filter membrane (6) of the cathode chamber (4). The filter residue conveyor belt (15) is located below the opening (14). The leaching solution discharge pipe (16) is communicated with the leaching tank, and a leaching solution discharge port valve (17) is installed at the connection of the leaching solution discharge pipe (16) and the leaching tank; 2. The device for trough-type power-on leaching of argillaceous sandstone uranium ore according to claim 1, wherein: The number of the stirring and crushing wheels (7) is multiple, and the multiple stirring and crushing wheels (7) are distributed in the crushing and activation chamber (8); 3. The device for trough-type electrokinetic leaching of argillaceous sandstone uranium ore according to claim 2, wherein: The leaching tank is of a rectangular cuboid tank structure; 4. The device for slot-type electrokinetic leaching of argillaceous sandstone uranium ore according to claim 3, wherein: The volume of the leaching tank is 3.3m×1.8m×1.7m; 5. The device for trough-type electrokinetic leaching of argillaceous sandstone uranium ore according to claim 3, wherein: It further includes a power control component. The power control component is fixedly installed on the outer side wall of the cathode chamber (4) of the leaching tank. The power control component includes a power supply (18). The power supply (18) has a power external interface (19) and a power button (20). The circuit of the power supply (18) is connected to control the power control component, including switches of the electrodes and the stirring and crushing wheel (7) in the leaching tank, switches of the telescopic discharging plate (13) and the filter residue conveyor belt (15), and the switch of the electric extraction pump (12) of the feeding pipe; 6. The device for trough-type electrokinetic leaching of argillaceous sandstone uranium ore according to claim 5, characterized in that: The control of the telescopic discharging plate (13) is electric opening and closing; 7. The device for slot-type electrified leaching of argillaceous sandstone uranium ore according to claim 6, wherein: One end of the telescopic discharging plate (13) close to the filter residue conveyor belt (15) is set to be openable and closable, and the corresponding other side is connected to the bottom of the leaching tank and is rotatable; 8. A method for trough-type electrokinetic leaching of argillaceous sandstone uranium ore using the device according to any one of claims 5-7, characterized in that: Including the following steps: S1: Turn on the power supply (18) to turn on the stirring and crushing wheel (7), and at the same time set the rotation speed of the stirring and crushing wheel (7) to 200r / min; S2: Put 10 m 3 of argillaceous sandstone uranium ore pulp, ferric chloride, and hydrochloric acid into the crushing and activation chamber (8) of the leaching tank, and adjust the pH of the reaction system to 4 ± 0.1; S3: After stirring for 30min, adjust the rotation speed to 10r / min, turn on the power supply of the positive electrode, and set the voltage gradient in the leaching tank to 1V / cm to start electro-leaching; S4: After 10min of power-on time, open the leaching solution discharge port valve (17) to start collecting the uranium-containing leaching solution. After the leaching solution has flowed out, turn off the stirring and crushing wheel (7) and the power supply (18); S5: Turn on the switches of the filter residue conveyor belt (15) and the telescopic discharging plate (13) to collect the filter residue; 9. The method for slot-type electrified leaching of argillaceous sandstone uranium ore according to claim 8, characterized in that: The ferric chloride is solid ferric chloride, and the dosage is 6500g.

10. The method for slot-type power-on leaching of argillaceous sandstone uranium ore according to claim 8, wherein: The hydrochloric acid is concentrated hydrochloric acid with a mass fraction of 36% to 38%, and the dosage is 0.09 L.

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