A circulating leaching device and leaching method for soil rubidium salt

Abstract

The present invention provides a circulating leaching device and leaching method for soil rubidium salts. By setting a plurality of leaching stations and allowing the circulation of the leaching solution to be opposite to the circulation direction of the mud, the soil sample at each station can be leached multiple times. According to the number of designed stations, the rubidium salt content in the leaching solution can be increased several times compared with the one-time leaching, and the waste of water resources is avoided during the multiple leaching process. At the same time, since the rubidium salt content in the final leaching solution is greatly increased, while improving the subsequent leaching solution purification efficiency, the amount of chemicals used in the purification process can be greatly reduced, which is more environmentally friendly and efficient than one-time leaching.

Description

Technical Field

[0001] The invention relates to the technical field of metallurgy and mineral extraction, and in particular to a circulating leaching device and a leaching method for soil rubidium salt. Background Art

[0002] The content of rubidium in the earth's crust is 5.1×10 -5 —3.1×10 -4 , ranked 16th in element abundance. For a long time, it has been recognized that rubidium resources are mainly found in granite pegmatite, brine and potash deposits. People mainly develop and recover rubidium from granite pegmatite deposits, and the main industrial mineral is lithium mica. The rubidium content in lithium mica is about 3.75%, the rubidium content in seawater is 0.12 g / ton, and many formation waters and salt lake brines also contain rubidium.

[0003] Rubidium is between potassium and cesium, and is extremely active. It is a silvery-white waxy metal that is soft and light. When exposed to air, it immediately loses its metallic color and is violently oxidized by oxygen, which can cause rubidium to spontaneously combust. It also reacts violently with water, even at -100°C. 0 Ice below 30°C will also explode. Rubidium's chemical reaction is more intense than that of sodium and potassium, and its chemical properties are more active.

[0004] Due to its unique physical and chemical properties, rubidium has irreplaceable uses in many fields. With the development of high-tech industries such as energy industry, atomic energy industry, bioengineering, aerospace industry and national defense industry, in the past decade, rubidium metal and its compounds have made great progress in traditional application fields such as biochemistry, catalysts, molecular biology, electronic devices, photoelectric tubes, special glass and medicine; and in new application fields such as magnetohydrodynamic power generation, thermal ion conversion power generation, ion propulsion engines, laser energy conversion electrical energy devices, etc., rubidium has also shown strong vitality.

[0005] In China, the soil in some areas (mainly red soil) is rich in rubidium and has mining value. As an emerging soil rubidium extraction industry, in the rubidium salt leaching process, due to the adsorption of the soil itself, the rubidium salt leached into the liquid in industrial production cannot meet the expected requirements, and most of it will still remain in the soil, causing a huge waste of manpower, material and financial resources. It is a technical problem that production companies cannot overcome.

[0006] In view of this, how to provide a circulating leaching device for soil rubidium salts and a corresponding leaching method is a technical problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0007] In view of this, the present invention provides a soil rubidium salt circulation leaching device and leaching method to solve the problems existing in the prior art. The specific scheme is as follows:

[0008] A soil rubidium salt circulation leaching device comprises n leaching stations, each of which comprises a leaching container and a stirring device arranged inside the leaching container, the upper parts of each leaching station are connected in series through a liquid transmission pipeline, each set of liquid transmission pipelines is provided with a liquid pump, and the lower part of each leaching station is connected in series through a mud transmission pipeline, each set of mud transmission pipelines is provided with a mud pump.

[0009] Specifically, the lower part of each leaching container is communicated with a mud trunk line, a trunk line valve is provided on the mud trunk line, and a branch line valve is provided on the branch line between the mud trunk line and the leaching container.

[0010] Specifically, the mud pump, the liquid pump, the branch valve, and the main valve are all communicatively connected to the control center.

[0011] Specifically, the stirring device is provided with a bubbling device.

[0012] Specifically, an ultrasonic generating device is also provided at the bottom of the leaching container.

[0013] A method for using a soil rubidium salt circulation leaching device comprises the following steps:

[0014] S1: When used for the first time, after injecting soil infiltration slurry into each of the leaching containers through the mud main line, close all branch valves and the main line valve;

[0015] S2: The first leaching station adds process raw water in an amount of C, completes the leaching process time, and separates the mud and leachate;

[0016] S3: The leachate obtained in step S2 is transferred to the second leaching station through a liquid transfer pipeline, and the amount of leachate transferred is C;

[0017] S4: the final C-content leachate obtained in step S2 is sequentially transferred to the third leaching station, the fourth leaching station, and finally the nth leaching station, and after the leaching process is completed at each station, the final C-content leachate is obtained;

[0018] S5. When step S3 is completed, inject C amount of water into the first leaching station again to repeat steps S2-S4.

[0019] S6. When it is detected that the rubidium element in the first leaching station is lower than the set value or meets the set number of cycles, the mud in the first leaching station is discharged as waste mud. At the same time, the mud pump between each leaching station is turned on, and the mud in the second leaching station enters the first leaching station through the transmission pipeline, and the mud in the third leaching station enters the second leaching station, until the mud in the nth leaching station is transmitted to the n-1th leaching station. At this time, the branch valve arranged under the nth leaching station and the mud pump arranged on the mud main line are opened, and the soil infiltration slurry is re-injected into the nth leaching station;

[0020] S7: Repeat steps S2-S6.

[0021] Specifically, in step S6, when the rubidium element is lower than 5% of the rubidium element content in the original soil infiltration slurry, the slurry in the first leaching station is discharged.

[0022] Specifically, in step S6, when the number of cycles after adding process raw water to the first leaching station is 3-5 times, the sludge in the first leaching station is discharged.

[0023] Specifically, the process raw water is deionized water or distilled water.

[0024] Specifically, the separation method of the mud and the leachate in step S2 is a static method or a filter press device.

[0025] The present invention provides a circulating leaching device and leaching method for soil rubidium salts. By setting a plurality of leaching stations and allowing the circulation of the leaching solution to be opposite to the circulation direction of the mud, the soil sample at each station can be leached multiple times. According to the number of designed stations, the rubidium salt content in the leaching solution can be increased several times compared with the one-time leaching, and the waste of water resources can be avoided during the multiple leaching process. Since the rubidium salt content in the final leaching solution is very high, the subsequent purification efficiency of the leaching solution is greatly improved. At the same time, the amount of chemicals used in the purification process can also be greatly reduced, which is more environmentally friendly and efficient than one-time leaching. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 This is a schematic diagram of the structure of the cyclic extraction of rubidium salt provided by the present invention.

[0028] 10. Leaching container 11. Stirring device 12. Ultrasonic generating device 13. Filter press device 20. Liquid transmission pipeline 21. Liquid pump 30. Mud transmission pipeline 31. Mud pump 40. Mud trunk line 41. Trunk line valve 42. Branch line valve. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Reference Figure 1 As shown, taking red clay as an example, the present invention claims protection for a soil rubidium salt circulation leaching device, including n leaching stations, each of which includes a leaching container 10 and a stirring device 11 arranged inside the leaching container 10, and the upper part between each leaching station is connected in series through a liquid transmission pipeline 20, and each set of liquid transmission pipelines 20 is provided with a liquid pump 21, and the liquid pump 21 is responsible for extracting the liquid of each leaching station, so that the leaching liquid in each station moves from the process raw water to the final leaching liquid. The lower part of each leaching station is connected in series through a mud transmission pipeline 30, and each set of mud transmission pipelines 30 is provided with a mud pump 31. The mud pump 31 is responsible for extracting the process mud of each leaching station, so that the process mud in each station moves from the final leaching liquid to the process raw water.

[0031] This device can recycle the C amount of process raw water injected from the beginning from the first leaching station to the nth leaching station one by one, and finally output the final leachate with high rubidium salt content. In the process of multiple cyclic leaching, the waste of water resources is avoided. At the same time, since the rubidium salt content in the final leachate is greatly increased, the subsequent leachate purification efficiency is virtually improved, and the amount of chemicals used in the purification process can be greatly reduced, which is more environmentally friendly and efficient than one-time leaching.

[0032] Specifically, in order to facilitate the individual replacement of soil infiltration slurry at each leaching station, the lower part of each leaching container 10 is connected to the mud main line 40, and a main line valve 41 is provided on the mud main line 40, and a branch line valve 42 is provided on the branch line between the mud main line 40 and the leaching container 10.

[0033] Specifically, the mud pump 31, the liquid pump 21, the branch valve 42, and the main valve 41 are all connected to the control center for communication. Through the above arrangement, automatic control can be easily achieved, saving personnel configuration.

[0034] Specifically, a bubbling device is provided on the stirring device 11. The stirring device may also be other types of flow disturbance devices, and the bubbling device can increase the leaching speed of the rubidium salt.

[0035] Specifically, an ultrasonic generator 12 is further provided at the bottom of the leaching container 10 .

[0036] A method for using a soil rubidium salt circulation leaching device comprises the following steps:

[0037] S1: When used for the first time, after the soil infiltration slurry is injected into each of the leaching containers 10 through the mud main line 40, all branch valves 42 and the main line valve 41 are closed;

[0038] S2: The first leaching station adds process raw water in an amount of C, completes the leaching process time, and separates the mud and leachate;

[0039] S3: The leaching liquid obtained in step S2 is transferred to the second leaching station through the liquid transfer pipeline (20), and the amount of the transferred leaching liquid is C;

[0040] S4: The final C-quantity leaching solution obtained in step S2 is sequentially transferred to the third leaching station, the fourth leaching station, and finally the nth leaching station, and after the leaching process is completed in each station, the final C-quantity leaching solution is obtained, and the final effluent is collected and transferred to the subsequent purification process;

[0041] S5. When step S3 is completed, inject C amount of water into the first leaching station again to repeat steps S2-S4.

[0042] S6. When the rubidium salt content in the first leaching station is detected to be lower than the set value or the set number of cycles is met, the mud in the first leaching station is discharged as waste mud. At the same time, the mud pump 31 between each leaching station is turned on, and the mud in the second leaching station enters the first leaching station through the transmission pipeline 30, and the mud in the third leaching station enters the second leaching station, until the mud in the nth leaching station is transmitted to the n-1th leaching station. At this time, the branch valve 42 arranged below the nth leaching station and the mud pump 31 arranged on the mud main line 40 are turned on, and the soil infiltration slurry is re-injected into the nth leaching station;

[0043] S7: Repeat steps S2-S6.

[0044] Specifically, in step S6, when the rubidium salt content is lower than 5% of the rubidium salt content in the original soil infiltration slurry, the slurry in the first leaching station is discharged.

[0045] Specifically, in step S6, when the number of cycles after adding process raw water to the first leaching station is 2-5 times, the sludge in the first leaching station is discharged.

[0046] Specifically, the process raw water is deionized water or distilled water. In order to reduce production costs, groundwater or surface water can also be selected according to local water and soil properties.

[0047] Furthermore, the separation method of the slurry and the leachate in step S2 is a static method or is achieved by a filter press device 13, wherein the filter press device is a French press device structure. After the leaching process time is completed, the filter press device is pressed downward, and the slurry mainly remains below the filter press device 13, while the leachate remains above the filter press device 13. The leachate of the filter press device 13 is extracted by a liquid pump 21, which can reduce the static time and thus improve production efficiency.

[0048] The soil targeted in this method is red clay, but this method includes but is not limited to red clay, and may also be loess or black soil, etc. It is suitable for soil with a rubidium content of not less than 50g / T. Rubidium-containing soil with a content below this has no mining value.

[0049] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation modes, which are merely illustrative rather than restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are within the protection of the present invention.

Claims

1. A soil rubidium salt circulation leaching device, characterized in that: The invention comprises n leaching stations, each of which comprises a leaching container (10) and a stirring device (11) arranged inside the leaching container (10); the upper parts of each leaching station are connected in series through a liquid transmission pipeline (20); each set of the liquid transmission pipeline (20) is provided with a liquid pump (21); the lower parts of each leaching station are connected in series through a mud transmission pipeline (30); each set of the mud transmission pipeline (30) is provided with a mud pump (31); The stirring device (11) is provided with a bubbling device; An ultrasonic generating device (12) is also provided at the bottom of the leaching container (10).

2. The soil rubidium salt circulation leaching device according to claim 1, characterized in that: The lower part of each leaching container (10) is communicated with a mud trunk line (40), a trunk line valve (41) is provided on the mud trunk line (40), and a branch line valve (42) is provided on the branch line between the mud trunk line (40) and the leaching container (10).

3. The soil rubidium salt circulation leaching device according to claim 2, characterized in that: The mud pump (31), the liquid pump (21), the branch valve (42), and the main valve (41) are all communicatively connected to a control center.

4. A method for using the soil rubidium salt circulation leaching device according to any one of claims 1 to 3, characterized in that: The following steps are involved: S1: When used for the first time, after the soil infiltration slurry is injected into each leaching container (10) through the mud main line (40), all branch line valves (42) and the main line valve (41) are closed; S2: The first leaching station adds process raw water in an amount of C, completes the leaching process time, and separates the mud and leachate; S3: The leaching liquid obtained in step S2 is transferred to the second leaching station through the liquid transfer pipeline (20), and the amount of the transferred leaching liquid is C; S4: the final C-content leachate obtained in step S2 is sequentially transferred to the third leaching station, the fourth leaching station, and finally the nth leaching station, and after the leaching process is completed at each station, the final C-content leachate is obtained; S5, while step S3 is completed, inject C amount of water into the first leaching station again and repeat steps S2-S4; S6. When the rubidium salt content in the first leaching station is detected to be lower than a set value or the set number of cycles is met, the mud in the first leaching station is discharged as waste mud. At the same time, the mud pump (31) between each leaching station is turned on, and the mud in the second leaching station enters the first leaching station through the transmission pipeline (30), and the mud in the third leaching station enters the second leaching station, until the mud in the nth leaching station is transmitted to the n-1th leaching station. At this time, the branch valve (42) arranged below the nth leaching station and the mud pump (31) arranged on the mud main line (40) are turned on, and the soil infiltration slurry is re-injected into the nth leaching station; S7: Repeat steps S2-S6.

5. The method for using the soil rubidium salt circulation leaching device according to claim 4, characterized in that: In step S6, when the rubidium content is lower than 5% of the rubidium content in the original soil infiltration slurry, the slurry in the first leaching station is discharged.

6. The method for using the soil rubidium salt circulation leaching device according to claim 5, characterized in that: In step S6, when the number of cycles after adding process raw water to the first leaching station is 3-5 times, the sludge in the first leaching station is discharged.

7. The method for using the soil rubidium salt circulation leaching device according to claim 4, characterized in that: The process raw water is deionized water or distilled water.

8. The method for using the soil rubidium salt circulation leaching device according to claim 4, characterized in that: The method for separating the slurry and the leachate in step S2 is a static method or a filter press device (13).

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