CN109828100B - To low permeability uranium-bearing sandstone infiltration increasing leaching test system - Google Patents
To low permeability uranium-bearing sandstone infiltration increasing leaching test system Download PDFInfo
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- CN109828100B CN109828100B CN201910202893.0A CN201910202893A CN109828100B CN 109828100 B CN109828100 B CN 109828100B CN 201910202893 A CN201910202893 A CN 201910202893A CN 109828100 B CN109828100 B CN 109828100B
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- 238000012360 testing method Methods 0.000 title claims abstract description 83
- 238000002386 leaching Methods 0.000 title claims abstract description 76
- 229910052770 Uranium Inorganic materials 0.000 title claims abstract description 73
- JFALSRSLKYAFGM-UHFFFAOYSA-N uranium(0) Chemical group [U] JFALSRSLKYAFGM-UHFFFAOYSA-N 0.000 title claims abstract description 73
- 230000035699 permeability Effects 0.000 title claims description 16
- 230000008595 infiltration Effects 0.000 title claims description 7
- 238000001764 infiltration Methods 0.000 title claims description 7
- 239000007789 gas Substances 0.000 claims abstract description 98
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 62
- 239000007788 liquid Substances 0.000 claims abstract description 60
- 229910052704 radon Inorganic materials 0.000 claims abstract description 45
- SYUHGPGVQRZVTB-UHFFFAOYSA-N radon atom Chemical compound [Rn] SYUHGPGVQRZVTB-UHFFFAOYSA-N 0.000 claims abstract description 45
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 31
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 31
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 28
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 28
- 239000001301 oxygen Substances 0.000 claims abstract description 28
- 230000009471 action Effects 0.000 claims abstract description 18
- 230000005284 excitation Effects 0.000 claims abstract description 13
- 238000006243 chemical reaction Methods 0.000 claims description 118
- 238000010438 heat treatment Methods 0.000 claims description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 26
- 229910001868 water Inorganic materials 0.000 claims description 26
- 238000002347 injection Methods 0.000 claims description 21
- 239000007924 injection Substances 0.000 claims description 21
- 238000002474 experimental method Methods 0.000 claims description 10
- 238000005259 measurement Methods 0.000 claims description 10
- 239000000243 solution Substances 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 6
- 238000000605 extraction Methods 0.000 claims description 5
- UBAZGMLMVVQSCD-UHFFFAOYSA-N carbon dioxide;molecular oxygen Chemical compound O=O.O=C=O UBAZGMLMVVQSCD-UHFFFAOYSA-N 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 20
- 230000008569 process Effects 0.000 abstract description 20
- 238000001556 precipitation Methods 0.000 abstract description 11
- 230000008859 change Effects 0.000 abstract description 8
- 239000000126 substance Substances 0.000 abstract description 8
- 238000011160 research Methods 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 238000011156 evaluation Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 9
- 229910052751 metal Inorganic materials 0.000 description 9
- 239000002184 metal Substances 0.000 description 9
- 238000010586 diagram Methods 0.000 description 5
- 238000007872 degassing Methods 0.000 description 4
- 239000010438 granite Substances 0.000 description 4
- 230000001808 coupling effect Effects 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 229910001882 dioxygen Inorganic materials 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000004992 fission Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000010863 uranium mill tailing Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Monitoring And Testing Of Nuclear Reactors (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a leaching test system for low-permeability uranium-bearing sandstone, which comprises a water-gas supply system, a high-low frequency excitation system, a leaching system and a data acquisition system; the system can test the permeation-increasing leaching of the low-permeability uranium-containing sandstone and radon precipitation under the action of inflation pressures of different vibration frequencies, vibration time, temperature and carbon dioxide and oxygen, and can also test the influence of the change of the inflation pressures of the vibration frequencies, the vibration time, the temperature and the air on the radon precipitation of the bulk uranium-containing substances. According to the invention, ultrasonic waves and sound waves are utilized to vibrate a sample, so that the porosity of sandstone is increased, the flow of liquid is increased, the contact of uranium-containing sandstone and liquid is accelerated, the uranium leaching rate is increased, the radon content change in the vibration leaching process is detected, an evaluation basis is made for the environmental radon pollution, and meanwhile, the test research can be carried out on the pollution problem of radon precipitation influenced by air pressure, temperature and vibration in the stacking process of uranium-containing substances on the earth surface.
Description
Technical Field
The invention relates to the technical field of in-situ leaching exploitation of low-permeability uranium-bearing sandstone ore deposits, in particular to an enhanced leaching test system for low-permeability uranium-bearing sandstone.
Background
Nuclear power is obtained by utilizing uranium nuclear fission, the uranium nuclear fission has large energy release, and no greenhouse gas and other harmful dust are discharged, so that the nuclear power is clean energy. Under the large situation that environmental pollution is increasingly serious, all countries around the world are devoted to the development and utilization of nuclear power. Uranium mining is important to ensure the large amount of natural uranium required for nuclear power development.
Among the ascertained uranium resources reserves in China, the sandstone-type uranium ore resources account for about 35%, the low-permeability resources with ore permeability smaller than 0.5m/d account for more than 70% of sandstone-type uranium resources, the low-permeability uranium-bearing sandstone has low porosity, channels for leaching solutions to pass through are few, permeability coefficients of physical seepage are small, in-situ leaching technological parameters are arranged according to a conventional seepage rule, liquid extraction and injection amounts are small, leaching rate is low, mining cost is high, and utilization of sandstone-type uranium resources is hindered.
At present, few research is conducted on the on-site leaching exploitation of a low-permeability uranium-bearing sandstone deposit, the research on the leaching and unfolding of the low-permeability uranium-bearing sandstone in the on-site leaching exploitation of the low-permeability uranium-bearing sandstone deposit is not conducted, and meanwhile, the research on the leaching and unfolding of radon in the leaching and unfolding of the low-permeability uranium-bearing sandstone in the leaching and unfolding of the radon in the leaching and unfolding process of the low-permeability uranium-bearing sandstone in the presence of changes of vibration frequency (low-frequency vibration and ultrasonic vibration), vibration time, leaching temperature and inflation pressure is also blank.
Disclosure of Invention
The invention aims to provide a low-permeability uranium-bearing sandstone permeation-increasing leaching test system so as to obtain the change rule of uranium leaching and radon precipitation of the low-permeability uranium-bearing sandstone under the combined action of vibration, temperature and inflation pressure.
The technical scheme of the invention is as follows:
The utility model provides a to low infiltration uranium-bearing sandstone infiltration increase leaching test system, includes reaction unit, be provided with respectively on the reaction unit and be used for the heating device of sample intensification, be used for the inside water supply system that supplies water, oxygen, carbon dioxide gas, air of reaction unit, be used for to the required high-frequency vibration effect of reaction unit application test and the high-low frequency excitation system of low frequency vibration effect, be used for gathering experimental data's data acquisition system.
Preferably, the reaction device comprises a reaction tank for containing samples, the top of the reaction tank is detachably connected with a second flange for sealing air inlet and water inlet pipelines, the reaction tank comprises a shell and an inner container arranged inside the shell, a gap for facilitating leaching solution to flow out is arranged between the inner container and the shell, the inner container comprises two hollow semi-cylinders which are mutually buckled to form a cylinder, and a plurality of meshes for realizing uniform contact of leaching solution and the samples are uniformly distributed on the wall of the inner container.
Preferably, a plug and a liquid taking device are arranged at the bottom of the shell, and the liquid taking device is used for taking out part of leaching liquid from the reaction tank for measurement in the test process.
Preferably, the liquid taking device comprises a liquid taking hole formed in the bottom of the shell, and a valve for controlling on-off of liquid is connected to the liquid taking hole in a threaded mode.
Preferably, a plurality of protruding blocks for supporting the inner container are arranged in the gap, and the side surface of the protruding blocks, which is away from the inner container, is fixedly connected with the inner wall of the shell.
Preferably, the heating device comprises a heating tank sleeved outside the reaction tank, heating wires are uniformly arranged in the heating tank, the heating wires are electrically connected with a temperature controller, and the temperature controller is electrically connected with a power supply through a control switch.
Preferably, the heating tank is arranged on the supporting device, the supporting device comprises a first bracket fixedly connected with the heating tank, and the first bracket is fixedly connected with a base arranged below the first bracket.
Preferably, the water-gas supply system comprises a water supply unit, an oxygen supply unit, a carbon dioxide gas supply unit and an air inlet unit, wherein the water supply unit is used for supplying test water into the inner container, the carbon dioxide gas supply unit is used for supplying carbon dioxide gas required by experiments into the inner container, and the oxygen supply unit is used for supplying oxygen with flow required by the experiments into the inner container; the water supply unit comprises a liquid injection box, the liquid injection box is communicated with the inside of the liner, and a second stop valve is arranged on a pipeline between the liquid injection box and the liner; the carbon dioxide gas supply unit comprises a carbon dioxide high-pressure gas cylinder, an outlet of the carbon dioxide high-pressure gas cylinder is sequentially connected with a first pressure reducing valve, a first flowmeter, a first booster pump and a first check valve, and the first check valve is communicated with the inside of the liner; the air inlet unit comprises a stop valve I which is connected between the flowmeter I and the booster pump I through a tee joint, and the stop valve I is communicated with the air compressor; the oxygen supply unit comprises an oxygen high-pressure gas cylinder, an outlet of the oxygen high-pressure gas cylinder is sequentially connected with a pressure reducing valve II, a flow meter II, a booster pump II and a check valve II, and the check valve II is communicated with the inside of the liner.
Preferably, the high-low frequency excitation system comprises an ultrasonic vibrator for applying a high-frequency vibration effect required for the test to the reaction device and a low-frequency vibration vibrator for applying a low-frequency vibration effect required for the test to the reaction device; the ultrasonic vibrator is electrically connected with the ultrasonic generator, the ultrasonic vibrator is fixedly connected with a first flange, and the first flange is detachably connected to the bottom of the heating tank; the low-frequency vibration exciter is fixedly connected to a second bracket, and the second bracket is fixedly connected with the base; the low-frequency vibration exciter is connected with a vibration control device, the vibration control device comprises a power amplifier electrically connected with the low-frequency vibration exciter, the power amplifier is electrically connected with the sweep frequency signal generator, and the low-frequency vibration exciter is fixedly connected with the bracket.
Preferably, the data acquisition system comprises a force sensor arranged on the first bracket, wherein the force sensor is electrically connected with a charge amplifier, and the charge amplifier is electrically connected with the data acquisition device; the data acquisition system also comprises a second barometer and a second barometer sensor which are arranged on the reaction tank and used for measuring the internal pressure of the reaction tank; the data acquisition system further comprises a gas collection tank, a first barometer is arranged on the gas collection tank, the gas collection tank is sequentially connected with a fifth stop valve, a filter and a third stop valve, the third stop valve is connected with the reaction tank, a vacuum pump, a fourth stop valve and a third pressure reducing valve are further connected on a pipeline between the fifth stop valve and the filter through five-way connection, the fourth stop valve is communicated with the atmosphere, and the third pressure reducing valve is connected with the gas collection tank; the gas collection tank is communicated with the radon measuring instrument after being sequentially connected with the pressure reducing valve IV and the flowmeter III through pipelines.
Compared with the prior art, the permeability-increasing leaching test system for the uranium-bearing sandstone with low permeability has the beneficial effects that:
The invention provides a system for the permeation-increasing leaching and radon precipitation test of low-permeability uranium-bearing sandstone under the action of different vibration frequencies, vibration time, temperature and inflation pressure, which can be used for carrying out the influence test of the vibration frequency, vibration time, temperature and inflation pressure changes on uranium-bearing sandstone uranium leaching and radon precipitation under the action of vibration, and the test of influence of air pressure, temperature and vibration on uranium-bearing substances such as uranium tail sand and granite.
The whole test system mainly comprises a water-gas supply system, a data acquisition system, a high-low frequency excitation system and a leaching system, can realize the accurate adjustment of inflation pressure, vibration frequency, vibration time and temperature, can realize the real-time sampling of the gas in the leaching liquid, the immersed sandstone and the reaction tank under the vibration action, provides possibility for realizing uranium leaching rate analysis under the vibration stress-seepage-temperature coupling action, and comprehensively analyzes radon leaching.
Aiming at the problems of low permeability and low uranium-bearing sandstone leaching amount, the invention expands the problems of low uranium-bearing sandstone permeability and low uranium leaching amount, and adopts ultrasonic waves and sound waves to vibrate the sandstone in the process of reduction leaching, so as to increase the porosity of the sandstone, thereby increasing the uranium leaching rate, simultaneously enhancing the flow of liquid by vibration, accelerating the contact between the uranium-bearing sandstone and the liquid, accelerating the uranium leaching rate, providing service for uranium ore yield increase, simultaneously detecting radon content change in the leaching process, and evaluating the radon pollution in the environment. In addition, the test device can be used for researching the problem that the surface uranium-containing substances such as uranium tailings and granite are polluted due to radon precipitation caused by air pressure, temperature and vibration in the stacking process.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is an enlarged view of a portion of the present invention;
FIG. 3 is a schematic diagram of a water gas supply system according to the present invention;
FIG. 4 is a schematic diagram of a data acquisition system according to the present invention;
FIG. 5 is a schematic diagram of the high-low frequency excitation system of the present invention;
FIG. 6 is a schematic diagram of a data acquisition system according to the present invention;
FIG. 7 is a schematic view of the present invention in which the liner is ejected from the reaction tank.
Reference numerals:
1. A carbon dioxide high pressure gas cylinder; 2. an oxygen high pressure gas cylinder; 3. a first pressure reducing valve; 4.a pressure reducing valve II; 5. a first flowmeter; 6.a stop valve I; 7. an air compressor; 8. a second stop valve; 9. a liquid injection box; 10. a stop valve III; 11. a filter; 12. a vacuum pump; 13. a stop valve IV; 14. a stop valve V; 15. a pressure reducing valve III; 16.a third flowmeter; 17. a radon measuring instrument; 18. a pressure reducing valve IV; 19. a barometer I; 20. a gas collection tank; 21. a second bracket; 22. a base; 23. a force sensor; 24. an ultrasonic vibrator; 25. a first bracket; 26. the base moves the handle; 27. a liquid taking device; 28. a second check valve; 29. a first booster pump; 30. a second booster pump; 31. a second flowmeter; 32. a first check valve; 33. a second barometer; 34. an air pressure sensor; 35. a charge amplifier; 36. a data collector; 37. a power amplifier; 38. a sweep frequency signal generator; 39. a low frequency vibration exciter; 40. a temperature controller; 41. an ultrasonic generator; 42. a top cover fixing screw; 43. a first flange; 44. a reaction tank; 45. a plug; 46. a set screw; 47. a heating tank; 48. a second flange; 49. an inner container; 50. the long rod is screwed.
Detailed Description
One embodiment of the present invention will be described in detail with reference to fig. 1 to 7, but it should be understood that the scope of the present invention is not limited by the embodiment.
As shown in fig. 1, the leaching test system for the uranium-bearing sandstone with low permeability comprises a reaction device, wherein the reaction device is respectively provided with a heating device for heating a sample, a water-gas supply system for supplying water, oxygen, carbon dioxide gas and air to the inside of the reaction device, a high-low frequency excitation system for applying high-frequency vibration action and low-frequency vibration action required by the test to the reaction device, and a data acquisition system for acquiring experimental data.
Further, as shown in fig. 2, the reaction device includes a reaction tank 44 for containing a sample, a second flange 48 for sealing air inlet and water inlet pipe is detachably connected to the top of the reaction tank 44, the reaction tank 44 includes a housing and a liner 49 disposed inside the housing, a gap for facilitating the leaching solution to flow out is disposed between the liner 49 and the housing, the liner 49 includes two hollow semi-cylinders fastened together to form a cylinder, and a plurality of meshes for achieving uniform contact between the leaching solution and the sample are uniformly distributed on the liner wall of the liner 49.
Further, a plug 45 and a liquid taking device 27 are arranged at the bottom of the shell, and the liquid taking device 27 is used for taking out part of leaching liquid from the reaction tank 44 for measurement in the test process.
Further, the liquid taking device 27 includes a liquid taking hole formed at the bottom of the housing, and a valve for controlling on/off of liquid is screwed on the liquid taking hole.
Further, a plurality of protruding blocks for supporting the inner container 49 are arranged in the gap, and the side surface of the protruding blocks, which is away from the inner container 49, is fixedly connected with the inner wall of the shell.
Further, the heating device comprises a heating tank 47 sleeved outside the reaction tank 44, heating wires are uniformly arranged in the heating tank 47, the heating wires are electrically connected with a temperature controller 40, and the temperature controller 40 is electrically connected with a power supply through a control switch.
Further, the heating tank 47 is disposed on a supporting device, and the supporting device includes a first bracket 25 fixedly connected to the heating tank 47, and the first bracket 25 is fixedly connected to the base 22 disposed below the first bracket.
Further, as shown in fig. 3, the water-gas supply system includes a water supply unit for supplying test water into the interior of the inner container 49, an oxygen supply unit for supplying carbon dioxide gas required for the test into the interior of the inner container 49, a carbon dioxide gas supply unit for supplying oxygen gas at a flow rate required for the test into the interior of the inner container 49, and an air intake unit; the water supply unit comprises a liquid injection box 9, wherein the liquid injection box 9 is communicated with the inside of the liner 49, and a second stop valve 8 is arranged on a pipeline between the liquid injection box 9 and the liner 49; the carbon dioxide gas supply unit comprises a carbon dioxide high-pressure gas cylinder 1, wherein an outlet of the carbon dioxide high-pressure gas cylinder 1 is sequentially connected with a pressure reducing valve I3, a flow meter I5, a booster pump I29 and a one-way valve I32, and the one-way valve I32 is communicated with the inside of the liner 49; the air inlet unit comprises a stop valve I6 which is connected between a flowmeter I5 and a booster pump I29 through a tee joint, and the stop valve I6 is communicated with an air compressor 7; the oxygen supply unit comprises an oxygen high-pressure gas cylinder 2, an outlet of the oxygen high-pressure gas cylinder 2 is sequentially connected with a pressure reducing valve II 4, a flow meter II 31, a booster pump II 30 and a check valve II 28, and the check valve II 28 is communicated with the inside of the liner 49.
Further, as shown in fig. 5, the high-low frequency excitation system includes an ultrasonic vibrator 24 for applying a high-frequency vibration effect required for the test to the reaction device and a low-frequency vibration vibrator 39 for applying a low-frequency vibration effect required for the test to the reaction device; the ultrasonic vibrator 24 is electrically connected with the ultrasonic generator 41, the ultrasonic vibrator 24 is fixedly connected with the first flange 43, and the first flange 43 is detachably connected to the bottom of the heating tank 47; the low-frequency vibration exciter is a low-frequency vibration exciter 39 fixedly connected to the second bracket 21, and the second bracket 21 is fixedly connected with the base 22; the low-frequency vibration exciter 39 is connected with a vibration control device, the vibration control device comprises a power amplifier 37 electrically connected with the low-frequency vibration exciter 39, the power amplifier 37 is electrically connected with a sweep frequency signal generator 38, and the low-frequency vibration exciter 39 is fixedly connected with the first bracket 25.
Further, as shown in fig. 4 and 6, the data acquisition system includes a force sensor 23 disposed on a first bracket 25, the force sensor 23 is electrically connected to a charge amplifier 35, and the charge amplifier 35 is electrically connected to a data acquisition unit 36; the data acquisition system also comprises a second barometer 33 and a second barometer pressure sensor 34, wherein the second barometer 33 and the barometer pressure sensor 34 are arranged on the reaction tank 44 and are used for measuring the pressure inside the reaction tank 44; the data acquisition system further comprises a gas collection tank 20, a first barometer 19 is arranged on the gas collection tank 20, the gas collection tank 20 is sequentially connected with a stop valve five 14, a filter 11 and a stop valve three 10, the stop valve three 10 is connected with a reaction tank 44, a pipeline between the stop valve five 14 and the filter 11 is also connected with a vacuum pump 12, a stop valve four 13 and a pressure reducing valve three 15 through five-way connection, the stop valve four 13 is communicated with the atmosphere, and the pressure reducing valve three 15 is connected with the gas collection tank 20; the gas collection tank 20 is connected with the pressure reducing valve IV 18 and the flow meter III 16 in sequence through pipelines and then is communicated with the radon measuring instrument 17.
As shown in fig. 1,2 and 3, the embodiment of the invention provides a test system for low-permeability uranium-bearing sandstone permeation increase leaching, which aims at the low-permeability uranium-bearing sandstone permeation increase leaching under the action of different vibration frequencies, temperatures and inflation pressures, and can be used for carrying out the test of influence of the vibration frequency, vibration time, temperature and inflation pressure changes on uranium leaching and radon precipitation under the action of vibration, wherein the pressure resistance of the system is 0 to 10 mpa in the test process.
As shown in figure 1, the whole test system mainly comprises a water-gas supply system, a data acquisition system, a high-low frequency excitation system and a leaching system, the device can realize the accurate adjustment of inflation pressure, vibration frequency, vibration time and temperature, can realize the study on the chemical composition of leaching liquid under the vibration effect, the change of porosity and permeability of a sample, can realize the comprehensive analysis of uranium leaching and radon leaching under the vibration stress-seepage-temperature coupling effect, and can also develop the measurement analysis of radon leaching problems of uranium-containing substances accumulated on the earth surface such as uranium tail sand, granite and the like under the air pressure, temperature and vibration effect.
The utility model provides a to low permeability uranium-bearing sandstone infiltration increase leaching test system, includes aqueous vapor feed system, high low frequency excitation system, soaks out system and data acquisition system, and main reaction unit is the retort, has seted up inlet port, gas extraction hole, liquid extraction hole and flowing back hole on the retort, and the external force that the retort received mainly comes from ultrasonic vibrator, low frequency vibration exciter, data acquisition by data acquisition ware, gas pressure sensing device, survey radon.
Before the test, the injection tank 9 is filled with water, the stop valve II 8 is opened firstly, a certain amount of water is measured by the measuring cup and filled into the injection tank 9, the water flows into the reaction tank 44 from the injection tank through the stop valve II 8, the pipelines from the injection tank 9 to the stop valve II 8 are connected through metal hard pipes, and the parts from the stop valve II to the reaction tank 44 adopt metal hoses, so that vibration can be effectively prevented.
The carbon dioxide gas is depressurized from the carbon dioxide high-pressure gas cylinder 1 to one atmosphere pressure through the depressurization valve I3 and then enters the flowmeter I5, the flowmeter I5 is metered and then enters the booster pump I29 to be pressurized to the test pressure, the test pressure enters the reaction tank 44 through the one-way valve I32, a high-pressure metal hard tube is adopted from the gas cylinder to the one-way valve I32, the one-way valve I32 enters the reaction tank 44, a metal hose is adopted, damage to a pipeline caused by vibration can be effectively prevented, and the depressurization valve arranged in front of the flowmeter can effectively protect the flowmeter from being damaged by the high pressure; the booster pump can provide the pressure required for the test in the reaction tank 44, and the check valve can effectively protect the booster pump from the recoil pressure of the reaction tank 44.
The oxygen is depressurized to one atmosphere pressure from the oxygen high-pressure gas cylinder 2 through the pressure reducing valve II 4, then enters the flow meter II 31, enters the booster pump II 30 after being metered by the flow meter II 31, is boosted to the pressure required by the test by the booster pump II 30, enters the check valve II 28, flows into the reaction tank 44, adopts a high-pressure metal hard tube from the gas cylinder to the check valve II 28, and the check valve II 28 enters the reaction tank 44 and adopts a metal hose.
In the case of uranium leaching tests on bulk uranium ore or pressed uranium ore, it is necessary to inject water into the reaction tank 44 first and then sequentially inject carbon dioxide and oxygen.
Before the test, if only air is injected into the reaction tank 44, mainly the experiment of separating out the scattered uranium ore and uranium tailing radon is carried out, the air compressor 7 is used for providing air pressure in the test process, the first booster pump 29 is used for boosting the pressure required by the test, the air flows into the reaction tank 44 through the one-way valve 32, impurities exist in a high-pressure oxygen inlet pipeline, the spark is easily rubbed out in the air charging process to cause explosion, the air inlet pipeline and the carbon dioxide inlet pipeline share one booster pump and the one-way valve, the specific connection mode is that the air compressor 7 and the carbon dioxide inlet pipeline share the booster pump, the air inlet is controlled by the one-way valve 6 and the leakage of the carbon dioxide gas is prevented, and the air enters the one-way valve 29 from the one-way valve 6 and enters the reaction tank 44.
In making radon exhalation tests under the influence of air pressure, temperature and vibration during the process of stacking uranium-containing materials on the earth surface, only air needs to be injected into the reaction tank 44.
The main reaction vessel is a reaction tank 44, the top and the bottom of the reaction tank 44 are both fixed by flanges, the top of the reaction tank 44 is fixed by a top cover fixing screw 42 with a second flange 48 for sealing an air inlet pipeline and a water inlet pipeline, the first flange 43 is fixed with an ultrasonic vibrator 24, a porous inner container 49 with two halves being pulled is arranged in the reaction tank, after the test is finished, a plug 45 at the bottom of the reaction tank 44 can be disassembled, the inner container 49 of the reaction tank is ejected by a long rod threaded bolt 50, and the inner container 49 is broken off to obtain a sample.
Wherein, the bottom of the reaction tank is provided with a liquid taking device 27, and partial leaching liquid can be taken by the liquid taking device 27 for measurement in the test process.
Wherein, the ultrasonic vibrator 24 is welded on the first flange 43, and high-frequency vibration force is directly applied to the reaction tank 44 through the first flange 43; the low-frequency vibration exciter 39 is connected with the first bracket 25 through a long-handle screw rod, and in the vibration process, the vibration exciter 39 drives the reaction tank 44 to vibrate through the long-handle screw rod fixed on the first bracket 25.
Wherein, the outside of the reaction tank 44 is tightly sleeved with a heating tank 47, heating wires are uniformly distributed in the heating tank 47, the reaction tank 44 and the ultrasonic vibrator 24 are fixed by a flange one 43, and the heating tank 47 is controlled by a temperature controller 40 and connected by a cable.
Wherein the reaction tank 44 and the low-frequency vibration exciter 39 are fixed together on the same base.
The vibration control device comprises a power amplifier 37 and a sweep frequency signal generator 38, wherein the power amplifier 37 and the sweep frequency signal generator 38 are connected through a cable, the connection sequence is that the sweep frequency signal generator 38 enters the power amplifier 37 and then enters a low-frequency vibration exciter 39, the sweep frequency signal generator provides a signal source, and the power amplifier amplifies and transmits signals to the low-frequency vibration exciter for vibration.
The signal acquisition system comprises a charge amplifier 35 and a data acquisition unit 36, wherein the charge amplifier 35 and the data acquisition unit 36 are connected through a cable, the connection sequence is the signal acquired by the sensor 23, and the signal is transmitted into the data acquisition unit 36 after being amplified by the charge amplifier 35.
The data acquisition system mainly comprises a gas collection tank 20, a vacuum pump 12, a pressure reducing valve III 15, a pressure reducing valve IV 18 and a radon measuring instrument 17, wherein a metal hose is adopted from a reaction tank 44 to a stop valve III 10, a metal hard tube is adopted from the stop valve III 10 to the tail end of the device, a metal hose is adopted from the part, connected with the reaction tank 44, of a pipeline, and the influence of vibration on the pipeline can be effectively prevented, and the specific pipeline connection is as follows: the gas in the reaction tank 44 flows out from the pipeline into the stop valve III 10 and then flows into the filter 11, fine dust entering the pipeline from the reaction tank 44 is filtered, then enters the pressure reducing valve III 15 for pressure reduction and flows into the gas collecting tank 20, when the pressure in the gas collecting tank 20 reaches a certain value, the radon measuring instrument 17 is opened, the pressure reducing valve IV 18 is set, the gas in the gas collecting tank 20 flows into the pressure reducing valve IV 18, and after being metered by the flow meter III 16, the gas enters the radon measuring instrument 17 for radon measurement.
After the test is finished, in order to empty the gas collection tank 20 and the reaction tank 44 and prevent the internal pressure of the gas collection tank 20 and the reaction tank 44 from being too high, a bypass is arranged on a pipeline between the gas collection tank 20 and the vacuum pump 12 and is controlled by the stop valve III 10, the stop valve IV 13 and the stop valve V14, so that the gas collection tank 20 and the reaction tank 44 are protected.
The water-gas supply system of the test system mainly comprises a carbon dioxide high-pressure gas cylinder 1, an oxygen high-pressure gas cylinder 2, a first pressure reducing valve 3, a second pressure reducing valve 4, a first flowmeter 5, a second flowmeter 31, a first stop valve 6, a second stop valve 8, an air compressor 7, a liquid injection box 9, a first booster pump 29, a second booster pump 30, a second check valve 28 and a first check valve 32.
The data acquisition system further comprises a charge amplifier 35, a data acquisition unit 36, a power amplifier 37, a sweep frequency signal generator 38, a temperature controller 40, an ultrasonic generator 41, a barometer II 33 and a barometer sensor 34.
The high-low frequency excitation system mainly comprises a low frequency exciter 39, a second bracket 21, a base 22, a force sensor 23, an ultrasonic vibrator 24 and a base movable handle 26.
Wherein, the base 22 is provided with a base moving handle 26, which is convenient for moving the base 22.
When the gas pressure in the gas cylinder is lower than the test required pressure, the first booster pump 29 can be used, the second booster pump 30 can be used for realizing accurate pressurization, the second check valve 28 can be used for realizing unidirectional flow of high-pressure gas, the reaction tank 44 is used for fixing the sealing cover and the heating tank on the tank body of the reaction tank 44 through 8 inner hexagonal screws, gas and liquid flow into the reaction tank 44 through the gas inlet hole and the liquid inlet hole at the top of the sealing cover, the inner diameter of the reaction tank 44 is 130mm, the height is 210mm, the bearing gas pressure is 10MPa, and two hollow semi-cylindrical porous inner containers 49 are arranged in the reaction tank, and two cylinders with the inner diameters of 50mm and the height of 100mm are fixed side by side. In order to prevent leakage during the test, the bottom mold-withdrawal hole of the can body is plugged by the plug 45, the plug 45 is disassembled after the test is completed, and as shown in fig. 7, the porous liner 49 is slowly ejected from the reaction pot 44 by the long-rod threaded bolt 50 to obtain a test piece, and the liner 49 can be taken out if the test piece adopts a dispersion. The vibration exciter 39, the ultrasonic vibrator 24 and the tank body of the reaction tank 44 are connected by adopting rigid connection, so that the accurate transmission of vibration force is realized. The pressure sensor 34 and the air pressure meter II 33 arranged on the tank body of the reaction tank 44 can realize accurate control of pressure in the tank body, the filter 11 can effectively prevent impurities coming out of the tank body of the reaction tank 44 from entering the vacuum pump 12 and the air collection tank 20, the vacuum pump 12 can vacuumize the reaction tank 44 and the air collection tank 20, the air pressure meter I19 can realize that the same pressure of air is taken from the reaction tank 44 in each test, the air pressure reducing valve IV 18 between the air collection tank 20 and the radon measuring instrument 17 can set an atmospheric pressure in the test process to protect the radon measuring instrument 17, and the flowmeter 16 can realize accurate measurement of the air entering the radon measuring instrument 17.
The test process comprises the following steps:
A. Leaching measurement test
1. And (3) air tightness detection: before the test, the air tightness of the device is detected, so that the device is ensured to be airtight.
2. Degassing: closing all valves, opening a stop valve three 10, a stop valve five 14, a vacuum pump 12, a reaction tank 20 and a reaction tank 44, degassing the reaction tank 44 and the gas tank 20, and closing the vacuum pump 12, the stop valve three 10 and the stop valve five 14 after a period of time.
3. And (3) temperature adjustment: the low-frequency vibration test adopts the heating tank 47 controlled by the temperature controller 40 to regulate the temperature, the temperature controller 40 is started to enable the temperature of the electric heating wires uniformly distributed in the heating tank 47 to rise to the set temperature, in the test, the set temperature can be set to 30 ℃,40 ℃, 50 ℃ and 60 ℃ according to the test requirement, and the temperature control of the reaction tank 44 is realized by utilizing the close fitting conduction temperature of the heating tank 47 and the reaction tank 44.
4. And (3) liquid injection: the second stop valve 8 connected with the reaction tank 44 of the liquid injection tank 9 is opened, underground water with a certain mass of the liquid injection tank 9 is injected through the measuring cup, the underground water flows into the reaction tank 44 from the liquid injection tank through the pipeline, the test piece is submerged, and the second stop valve 8 is closed after the liquid completely flows into the reaction tank 44.
5. Injecting oxygen: setting a second pressure reducing valve 4 connected with an oxygen high-pressure gas cylinder 2, opening a second booster pump 30, opening a second check valve 28, injecting oxygen with a certain pressure into a reaction tank 44, and in experiments, after oxygen with the pressure of 0.1MPa, 0.2MPa, 0.3MPa, 0.4MPa, 0.5MPa, 0.6MPa, 0.7MPa, 0.8MPa, 0.9MPa and 1MPa can be injected according to experimental requirements, closing the second booster pump 30 and the second pressure reducing valve 4.
6. Injecting carbon dioxide: setting a first pressure reducing valve 3, opening a first booster pump 29, opening a first check valve 32, injecting carbon dioxide with a certain pressure into a reaction tank 44, injecting carbon dioxide with a pressure of 0.1MPa, 0.2MPa, 0.3MPa, 0.4MPa, 0.5MPa, 0.6MPa, 0.7MPa, 0.8MPa, 0.9MPa and 1MPa according to the experiment requirement in the experiment, wherein the pressure of the injected carbon dioxide is higher than the pressure of the injected oxygen, and different experiments can be carried out by different pressure combinations, so that the first booster pump 29 and the first pressure reducing valve 3 are closed in sequence.
7A, low frequency vibration: after the charge amplifier 35, the data collector 36, the power amplifier 37, the sweep frequency signal generator 38 and the low-frequency vibration exciter 39 are sequentially turned on and the reaction tank 44 is vibrated for a certain period of time (vibration frequencies of 10Hz, 20Hz, 30Hz, 40Hz and 50Hz are set according to experimental requirements, the vibration time can be set to 5min, 10min, 15min, 20min, 25min and 30min, and under the action of different inflation pressures, different vibration times and vibration frequency combinations can be tested under different conditions), vibration is stopped.
7B, high frequency vibration: the ultrasonic generator 41 is turned on, the ultrasonic vibrator 24 at the bottom of the tank body of the reaction tank 44 is used for applying vibration force to the reaction tank 44, the vibration of the reaction tank 44 is stopped after a certain time (the vibration frequency 28KHz is set according to the experimental requirement, the vibration time can be set to 5min, 10min, 15min, 20min, 25min and 30min, and under the action of different inflation pressures, different vibration times and vibration frequency combinations can be tested under different conditions).
8. Taking gas: the third pressure reducing valve 15 connected with the reaction tank 44 and the gas collecting tank 20 is opened, and after injecting gas with a certain pressure into the gas collecting tank 20, the pressure reducing valve is closed (the gas taking pressure is determined according to the pressure in the reaction tank, and the gas taking pressure is the same value in each experiment).
9. Radon measurement: the radon measuring instrument 17 is opened, and the pressure of the pressure reducing valve IV 18 between the gas collecting tank 20 and the flowmeter III 16 is regulated, so that the pressure of the outlet end of the pressure reducing valve IV 18 reaches one atmosphere.
10. Liquid taking: the stop valve IV 13 and the stop valve III 10 between the filter 11 and the reaction tank 44 are opened, the residual gas in the reaction tank 44 is discharged into the atmosphere until the tank pressure shows one atmosphere, the stop valve III 10 is closed, the stop valve IV 13 is opened, the liquid taking device 27 is opened, and a certain amount of liquid is taken out.
11. Repeated test: repeating the step 4 to inject the liquid into the reaction tank 44 until the liquid with the same volume as that of the step 4 is replenished, and stopping the injection; repeating step 5 to inject oxygen gas into the reaction tank 44 at the same pressure as step 5; repeating step 6 to inject carbon dioxide into the reaction tank 44 at the same pressure as step 6; the process operations of 7, 8, 9,10 are repeated.
12. Ion analysis: carrying out ion analysis on the obtained liquid to obtain uranium leaching rates under different conditions; the radon exhalation quantity change in the test process can be obtained by measuring the obtained gas through a radon measuring instrument.
B. Uranium-containing material radon precipitation test
1. And (3) air tightness detection: before the test, the air tightness of the device is detected, so that the device is ensured to be airtight.
2. Degassing: closing all valves, opening a stop valve III 10, a stop valve V14 and a vacuum pump 12, which are connected with a reaction tank 44 and a gas collection tank 20, opening the vacuum pump 12, degassing the reaction tank 44 and the gas collection tank 20, and closing the vacuum pump 12, the stop valve III 10 and the stop valve V14 after a period of time.
3. And (3) inflation: the first stop valve 6 is opened, the first check valve 32 is opened, the air compressor 7 and the first booster pump 29 are opened, and the air compressor 7 and the first booster pump 29 are required to be always opened in the test process so as to keep the constant air pressure of the sample. (0.1 Mpa, 0.2Mpa, 0.3Mpa, 0.4Mpa, 0.5Mpa, 0.6Mpa can be selected according to the test requirements)
4. Constant temperature: the temperature is regulated to be constant at the test set value (30 ℃, 40 ℃, 50 ℃ and 60 ℃ according to the test requirement)
5. Radon measurement: opening a pressure reducing valve III 15 between the vacuum pump 12 and the gas collecting tank 20, and a pressure reducing valve IV 18 between the gas collecting tank 20 and the radon measuring instrument 17, and measuring the radon content in the effluent flow by using the radon measuring instrument 17
6. The constant pressure in the reaction tank 44 must be maintained during the test, the constant pressure value of the air pressure in the reaction tank 44 must be ensured by adjusting the first air inlet booster pump 29 and the third air outlet pressure reducing valve 15, and the pressure values are different in different tests.
In summary, the embodiment of the invention provides a test system for the permeation-increasing leaching of uranium-bearing sandstone with low permeability under the action of different vibration frequencies, temperatures and inflation pressures, which can be used for testing the influence of the vibration frequency, vibration time, temperature and inflation pressure changes on uranium leaching and radon precipitation under the action of vibration. The whole test system mainly comprises a water-gas supply system, a data acquisition system, a high-low frequency excitation system and a leaching system, can realize the accurate adjustment of inflation pressure, vibration frequency, vibration time and temperature, can realize the study of chemical components of leaching liquid under the vibration effect, the change of porosity and permeability of a sample, and can realize the comprehensive analysis of uranium leaching and radon leaching under the coupling effect of vibration stress-seepage-temperature. Aiming at the problems of low permeability and low uranium-bearing sandstone leaching amount, the invention expands the problems of low permeability and low uranium leaching amount, and adopts ultrasonic waves and sound waves to vibrate sandstone in the process of reduction leaching, so as to increase the porosity of sandstone, thereby increasing the uranium leaching rate, simultaneously, the vibration energy aggravates the flow of liquid, accelerates the contact between uranium-bearing sandstone and liquid, accelerates the uranium leaching rate, provides service for uranium ore yield increase, detects radon content change in the leaching process, and evaluates and measures the environmental radon pollution. Meanwhile, the invention can also measure the radon precipitation variation of uranium-containing substances accumulated on the surface of the earth, such as uranium tail sand, granite and the like under the actions of air pressure, temperature and vibration.
The foregoing disclosure is merely illustrative of some embodiments of the invention, but the embodiments are not limited thereto, and any variations that may be contemplated by one skilled in the art should fall within the scope of the invention.
Claims (5)
1. The system is characterized by comprising a reaction device, wherein the reaction device is respectively provided with a heating device for heating a sample, a water-gas supply system for supplying water, oxygen, carbon dioxide gas and air to the inside of the reaction device, a high-low frequency excitation system for applying high-frequency vibration action and low-frequency vibration action required by the test to the reaction device, and a data acquisition system for acquiring experimental data;
The reaction device comprises a reaction tank (44) for containing a sample, the reaction tank (44) comprises a shell and an inner container (49) arranged in the shell, a gap which is convenient for leaching solution to flow out is arranged between the inner container (49) and the shell, the inner container (49) comprises two hollow semi-cylinders which are mutually buckled to form a cylinder, and a plurality of meshes which are uniformly arranged on the inner container wall of the inner container (49) and are used for realizing uniform contact between leaching solution and the sample;
The heating device comprises a heating tank (47) sleeved outside a reaction tank (44), heating wires are uniformly arranged in the heating tank (47), the heating wires are electrically connected with a temperature controller (40), and the temperature controller (40) is electrically connected with a power supply through a control switch;
The water-gas supply system comprises a water supply unit, an oxygen supply unit, a carbon dioxide gas supply unit and an air inlet unit, wherein the water supply unit is used for supplying test water into the inner container (49), the carbon dioxide gas supply unit is used for supplying carbon dioxide gas required by experiments into the inner container (49), and the oxygen supply unit is used for supplying oxygen with flow required by the experiments into the inner container (49); the water supply unit comprises a liquid injection box (9), the liquid injection box (9) is communicated with the inside of the inner container (49), and a stop valve II (8) is arranged on a pipeline between the liquid injection box (9) and the inner container (49); the carbon dioxide gas supply unit comprises a carbon dioxide high-pressure gas cylinder (1), wherein an outlet of the carbon dioxide high-pressure gas cylinder (1) is sequentially connected with a first pressure reducing valve (3), a first flowmeter (5), a first booster pump (29) and a first check valve (32), and the first check valve (32) is communicated with the inside of the liner (49); the air inlet unit comprises a first stop valve (6) which is connected between the first flowmeter (5) and the first booster pump (29) through a tee joint, and the first stop valve (6) is communicated with the air compressor (7); the oxygen supply unit comprises an oxygen high-pressure gas cylinder (2), an outlet of the oxygen high-pressure gas cylinder (2) is sequentially connected with a pressure reducing valve II (4), a flow meter II (31), a booster pump II (30) and a check valve II (28), and the check valve II (28) is communicated with the inside of the liner (49);
the high-low frequency excitation system comprises an ultrasonic vibrator (24) for applying a high-frequency vibration action required for the test to the reaction device and a low-frequency vibration vibrator (39) for applying a low-frequency vibration action required for the test to the reaction device; the ultrasonic vibrator (24) is electrically connected with the ultrasonic generator (41), the low-frequency vibration exciter (39) is connected with a vibration control device, the vibration control device comprises a power amplifier (37) electrically connected with the low-frequency vibration exciter (39), and the power amplifier (37) is electrically connected with the sweep frequency signal generator (38);
The data acquisition system comprises a force sensor (23), wherein the force sensor (23) is electrically connected with a charge amplifier (35), and the charge amplifier (35) is electrically connected with a data acquisition device (36); the data acquisition system further comprises a second barometer (33) and an air pressure sensor (34) which are arranged on the reaction tank (44) and used for measuring the internal pressure of the reaction tank (44); the data acquisition system further comprises a gas collection tank (20), a first barometer (19) is arranged on the gas collection tank (20), the gas collection tank (20) is sequentially connected with a fifth stop valve (14), a filter (11) and a third stop valve (10), the third stop valve (10) is connected with a reaction tank (44), a vacuum pump (12), a fourth stop valve (13) and a third pressure reducing valve (15) are further connected on a pipeline between the fifth stop valve (14) and the filter (11) through five-way connection, the fourth stop valve (13) is communicated with the atmosphere, and the third pressure reducing valve (15) is connected with the gas collection tank (20); the gas collection tank (20) is sequentially connected with the pressure reducing valve IV (18) and the flowmeter III (16) through pipelines and then communicated with the radon measuring instrument (17);
the top of the reaction tank (44) is detachably connected with a second flange (48) for sealing the air inlet and the water inlet pipeline;
The ultrasonic vibrator (24) is fixedly connected with a first flange (43), and the first flange (43) is detachably connected to the bottom of the heating tank (47); the low-frequency vibration exciter (39) is fixedly connected with the second bracket (21), and the second bracket (21) is fixedly connected with the base (22); the low-frequency vibration exciter (39) is fixedly connected with the first bracket (25);
the force sensor (23) is arranged on the first bracket (25).
2. A leaching test system for low permeability uranium containing sandstone with enhanced leaching according to claim 1, wherein the bottom of the housing is provided with a plug (45) and a liquid extraction device (27), the liquid extraction device (27) being adapted to take out part of the leaching liquid from the reaction tank (44) for measurement during the test.
3. The leaching test system for the uranium-bearing sandstone infiltration enhancement according to claim 2, wherein the liquid taking device (27) comprises a liquid taking hole formed in the bottom of the shell, and a valve for controlling on-off of liquid is connected to the liquid taking hole through threads.
4. The leaching test system for the uranium-bearing sandstone infiltration enhancement according to claim 1, wherein a plurality of protruding blocks for supporting the liner (49) are arranged in the gap, and the side surface of the protruding blocks, which is away from the liner (49), is fixedly connected with the inner wall of the shell.
5. A leaching test system for uranium-bearing sandstone with low permeability according to claim 1, wherein the heating tank (47) is arranged on a supporting device, the supporting device comprises a first bracket (25) fixedly connected with the heating tank (47), and the first bracket (25) is fixedly connected with a base (22) arranged below the first bracket.
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| CN110836790A (en) * | 2019-11-18 | 2020-02-25 | 核工业北京化工冶金研究院 | Multi-channel automatic measuring device and method for centralized control room of in-situ leaching uranium mining area |
| CN112540035B (en) * | 2020-11-30 | 2022-10-14 | 核工业北京化工冶金研究院 | Ultrasonic infiltration enhancement experimental method for low-permeability sandstone uranium ores |
| CN112649263B (en) * | 2020-12-11 | 2023-01-24 | 浙江科技学院 | Cylindrical sample undisturbed soaking type circumferential grouting sample preparation instrument and sample preparation method |
| CN112627795B (en) * | 2020-12-21 | 2023-01-17 | 石家庄铁道大学 | Sandstone uranium ore horizontal well ground immersion exploitation simulation test system and test method |
| CN114136863A (en) * | 2021-12-15 | 2022-03-04 | 石家庄铁道大学 | Sandstone uranium ore permeability testing device |
| CN114152732A (en) * | 2021-12-15 | 2022-03-08 | 石家庄铁道大学 | Sandstone uranium mine ground immersion mining simulation test device |
| CN114152731B (en) * | 2021-12-15 | 2024-05-07 | 石家庄铁道大学 | Uranium ore carbon dioxide blasting and carbon dioxide and oxygen on-site leaching exploitation test device |
| CN114965955B (en) * | 2022-05-20 | 2023-10-13 | 南华大学 | Uranium tailing filling body dynamic leaching experimental device and experimental method |
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