CN103711462B - A kind of ground-dipping uranium extraction leaching experiment device - Google Patents
A kind of ground-dipping uranium extraction leaching experiment device Download PDFInfo
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- CN103711462B CN103711462B CN201210380565.8A CN201210380565A CN103711462B CN 103711462 B CN103711462 B CN 103711462B CN 201210380565 A CN201210380565 A CN 201210380565A CN 103711462 B CN103711462 B CN 103711462B
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Abstract
The invention belongs to in-situ leaching uranium scientific experiment device technique field, be specifically related to a kind of ground-dipping uranium extraction leaching experiment device.Wherein: source of the gas includes oxygen source and carbon dioxide air source；By being arranged on the magnetic stirring apparatus stirred in container by gas-liquid mix dissolution；The pressure dissolved is controlled by the agitated container back-pressure valve of nitrogen cylinder, the pressure provided by intermediate receptacle back-pressure valve pilot plunger pump during experiment is identical with stirring pressure in container to pressure in fluid injection intermediate receptacle, then passes through pressure regulating part and divides and be pressed in fluid injection intermediate receptacle by leaching solution；Rock core is arranged in full-hole core clamper, and clamper two ends are provided with ring press pump and pressure transducer；The port of export arranges leaching back-pressure valve, simulated formation pressure the oxygen controlled in leachant and does not precipitate out；Balance metering system measures the quality of infusion solution, and experiment is automatically controlled by computer.
Description
Technical field
The invention belongs to in-situ leaching uranium scientific experiment device technique field, be mainly used under simulation stratum condition oxygen and leaching experiment research when carbon dioxide makes leachant, be specifically related to a kind of ground-dipping uranium extraction leaching experiment device.
Background technology
At present, the indoor leaching experiment of ground-dipping uranium extraction generally adopts leaching and post two kinds of research meanses of leaching.Leaching mainly in order to study possible total leaching rate, tentatively gropes Ingredient of lixiviant, as adopted autoclave, also can carry out oxygen and leaching research when carbon dioxide makes leachant.Post leaching is mainly used in the flowing experiment of simulation ground-dipping uranium extraction, studies extract technology, and formula is screened further and evaluates.
Post leaching generally adopts lucite or safety glass, as it is shown in figure 1, resistance to pressure is poor, can be used for acid leachant and conventional alkaline leachant (without gas).But, for relatively green extract technology, as adopted oxygen to make the extract technology of oxidant, in experimentation, oxygen pressure is higher, and conventional post leaching is poor due to system resistance to pressure, then cannot be carried out.
In order to carry out oxygen leaching experiment, it is necessary to experimental provision is improved.Mainly adopting stainless steel column, the connection of system is also adopted by stainless steel metal part, and this improves the resistance to pressure (as VogtT.C. uses oxygen pressure to reach 5.52MPa) of system；In addition adopt high pressure oxygen to be used as power source and molten leaching solvent, by solution presasure, oxygen used is carried out concentration measurement.As adopted oxygen and two kinds of gases of carbon dioxide to make leachant simultaneously, then first under low pressure pass into carbon dioxide, more under high pressure oxygen and leaching solution body reach dissolution equilibrium and carry out flowing experiment by air pressure.
But, the concentration accuracy to dissolve in Dosing Solution gas by pressure is poor.Owing to the dissolution equilibrium of gas under pressure Yu solution needs the regular hour (oxygen that dissolubility is little is likely to need several days time under without dispersion or stirring condition), its actual concentrations and theoretical value have a certain distance；And due to rock core degree of compaction change in post in experimentation, or experiment condition change, also often result in the pressure change of gas and make concentration of dissolved gas in solution change.
Except problem above, ground-dipping uranium extraction post bath unit all adopts broken rock core, core column without covering pressure, this just cannot simulated formation burden pressure, and the destruction of pore structure, make fluid flow in rock core differ greatly with actual, cause that post leaching is difficult to provide the information of leaching rate, uranium concentration aspect accurately.
Therefore, currently need badly for ground-dipping uranium extraction physical condition, design, manufacture a kind of formation condition (covering pressure, strata pressure, original place rock core) that can simulate sandstone uranium deposits can the leaching experiment device of the accurate molten leaching reagent such as metering oxygen and carbon dioxide, to improve the reliability of laboratory results, availability, provide technical support for actual production.
Summary of the invention
The technical problem to be solved in the present invention be to provide a kind of can the accurate molten leaching reagent such as metering oxygen and carbon dioxide the ground-dipping uranium extraction leaching experiment device of leaching experiment research can be carried out under simulation stratum condition.
In order to realize this purpose, the present invention adopts the technical scheme that:
A kind of ground-dipping uranium extraction experiment leaching device, mainly include source of the gas, high-pressure pressure-reducing valve, stop valve, mass-flow gas meter, feed liquor pipeline, stirring container, nitrogen cylinder, stirring container back-pressure valve, pneumatic operated valve, fluid injection intermediate receptacle, intermediate receptacle back-pressure valve, plunger displacement pump, pressure transducer, full-hole core clamper, ring press pump, leach back-pressure valve, balance metering system and computer etc., wherein:
Air-source inflow part: source of the gas includes oxygen source and carbon dioxide air source, two sources of the gas form air-source inflow part with high-pressure pressure-reducing valve, stop valve and mass-flow gas meter respectively successively, and then common entrance stirs container；
Feed liquor part: stirring container is connected with feed liquor pipeline, forms feed liquor part；Source gas induction part inputted by the magnetic stirring apparatus being arranged in stirring container and the leaching solution body mixed dissolution of feed liquor part input；
Pressure regulating part divides: the pressure of dissolving is controlled by the agitated container back-pressure valve of nitrogen cylinder, and decomposition pressure regulates part；When gas dissolves after completely, under nitrogen pressure effect, the fluid injection intermediate receptacle of leachant press-in completely will be dissolved；
Pressures partially: plunger displacement pump is connected with intermediate receptacle back-pressure valve and fluid injection intermediate receptacle successively, entrance point and the port of export at fluid injection intermediate receptacle arrange pneumatic operated valve, form pressures partially；The pressure provided by intermediate receptacle back-pressure valve pilot plunger pump during experiment is identical with stirring pressure in container to pressure in fluid injection intermediate receptacle, then passes through pressure regulating part and divides and be pressed in fluid injection intermediate receptacle by leaching solution；
Rock core part: experiment rock core is arranged in full-hole core clamper, and one end of full-hole core clamper is connected with ring press pump, provides confined pressure for it；Two ends are respectively provided with inlet pressure sensor and outlet pressure sensor simultaneously, carry out pressure measxurement to before and after leaching；The port of export arranges leaching back-pressure valve, simulated formation pressure the oxygen controlled in leachant and does not precipitate out；
Balance metering system measures the quality of infusion solution, and experiment is automatically controlled by computer.
Further, a kind of ground-dipping uranium extraction experiment leaching device as above, wherein, the flow≤50ml/min of mass-flow gas meter.
Further, a kind of ground-dipping uranium extraction experiment leaching device as above, wherein, fluid injection intermediate receptacle adopts the piston container of two same volumes, and inbuilt displacement sensor carries out capacity measurement and control, after a container has been noted, automatically switch in another piston container, it is ensured that the seriality of experiment.
Further, a kind of ground-dipping uranium extraction experiment leaching device as above, wherein, solution presasure is adjusted by nitrogen cylinder and stirring container back-pressure valve by course of dissolution, controls solution presasure theoretical dissolution more than the pressure 0.5MPa higher than oxygen.
Further, a kind of ground-dipping uranium extraction experiment leaching device as above, wherein, the diameter of full-hole core clamper is 75mm, and length is 300mm.
Further, a kind of ground-dipping uranium extraction experiment leaching device as above, wherein, stirring upper vessel portion side is provided with nitrogen inlet, bottom arranges stirring paddle, and bosom is provided with block and piston, drives stirring paddle to carry out gas-liquid mixed at stirring container by motor and magnet rotor.
Further, a kind of ground-dipping uranium extraction experiment leaching device as above, wherein, fluid injection intermediate receptacle adopts the piston container of two same volumes, and piston container head is provided with snap joint, and bottom is provided with liquid in-out mouth, the internal piston arranged with piston container nested encryptions and displacement bar, displacement bar is connected with piston in one end of piston internal tank, is connected with displacement transducer, control line and fixed mount in one end of piston external container, has coordinated capacity measurement and control.
Gas flow is measured by the present invention by mass-flow gas meter, and adopts stirring container to carry out gas dissolving, it is achieved dissolve concentration measurement and the rapid solution balance of gas；Adopt fluid injection intermediate receptacle, make dissolving gas not easily precipitate out again, keep stablizing of solution gas body burden；Adopt original rock core, improve the experimental result directive significance to actual production.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of prior art mesohigh post bath unit；
Fig. 2 is ground-dipping uranium extraction leaching experiment device schematic diagram of the present invention；
Fig. 3 is stirring intermediate receptacle structure chart；
Fig. 4 is intermediate receptacle structure chart.
In figure: 1 oxygen source, 2 carbon dioxide air sources, 3 high-pressure pressure-reducing valves, 4 stop valves, 5 mass-flow gas meters, 6 feed liquor pipelines, 7 stirring containers, 8 nitrogen cylinders, 9 stirring container back-pressure valves, 10 pneumatic operated valves, 11 fluid injection intermediate receptacles, 12 intermediate receptacle back-pressure valves, 13 plunger displacement pumps, 14 inlet pressure sensors, 15 full-hole core clampers, 16 ring press pumps, 17 outlet pressure sensors, 18 leach back-pressure valve, 19 balance metering systems, 20 computers, 21 motors, 22 magnet rotors, 23 stirring paddles, 24 blocks, 25 pistons, 26 nitrogen inlets, 27 liquid in-out mouths, 28 displacement bars, 29 pistons, 30 snap joints, 31 displacement transducers, 32 control lines, 33 fixed mounts.
Detailed description of the invention
Below in conjunction with accompanying drawing, by embodiment, technical solution of the present invention is further elaborated.
One ground-dipping uranium extraction of the present invention experiment leaching device, mainly include source of the gas, high-pressure pressure-reducing valve 3, stop valve 4, mass-flow gas meter 5, feed liquor pipeline 6, stirring container 7, nitrogen cylinder 8, stirring container back-pressure valve 9, pneumatic operated valve 10, fluid injection intermediate receptacle 11, intermediate receptacle back-pressure valve 12, plunger displacement pump 13, pressure transducer, full-hole core clamper 15, ring press pump 16, leach back-pressure valve 18, balance metering system 19 and computer 20 etc., wherein:
Air-source inflow part: source of the gas includes oxygen source 1 and carbon dioxide air source 2, and two sources of the gas form air-source inflow part with high-pressure pressure-reducing valve 3, stop valve 4 and mass-flow gas meter 5 respectively successively, then common entrance stirs container 7；Wherein flow≤the 50ml/min of mass-flow gas meter 5.
Feed liquor part: stirring container 7 is connected with feed liquor pipeline 6, forms feed liquor part；As it is shown on figure 3, stirring container 7 upper side is provided with nitrogen inlet 26, bottom arranges stirring paddle 23, and bosom is provided with block 24 and piston 25, drives stirring paddle 23 to carry out gas-liquid mixed at stirring container 7 by motor 21 and magnet rotor 22.Source gas induction part inputted by the magnetic stirring apparatus being arranged in stirring container 7 and the leaching solution body mixed dissolution of feed liquor part input；Solution presasure is adjusted by nitrogen cylinder 8 and stirring container back-pressure valve 9 by course of dissolution, controls solution presasure theoretical dissolution more than the pressure 0.5MPa higher than oxygen.
Pressure regulating part divides: the pressure of dissolving is controlled by the agitated container back-pressure valve 9 of nitrogen cylinder 8, and decomposition pressure regulates part；When gas dissolves after completely, under nitrogen pressure effect, the fluid injection intermediate receptacle 11 of leachant press-in completely will be dissolved；
Pressures partially: plunger displacement pump 13 is connected with intermediate receptacle back-pressure valve 12 and fluid injection intermediate receptacle 11 successively, entrance point and the port of export at fluid injection intermediate receptacle 11 arrange pneumatic operated valve 10, form pressures partially；The pressure provided by intermediate receptacle back-pressure valve 12 pilot plunger pump 13 during experiment is identical with stirring pressure in container 7 to pressure in fluid injection intermediate receptacle 11, then passes through pressure regulating part and divides and be pressed in fluid injection intermediate receptacle 7 by leaching solution；Wherein, fluid injection intermediate receptacle 11 adopts the piston container of two same volumes, and inbuilt displacement sensor carries out capacity measurement and control, after a container has been noted, automatically switches in another piston container, it is ensured that the seriality of experiment.Concrete structure is as shown in Figure 4, it it is the fluid injection intermediate receptacle 11 piston container that adopts two same volumes, piston container head is provided with snap joint 30, bottom is provided with liquid in-out mouth 27, the internal piston 29 arranged with piston container nested encryptions and displacement bar 28, displacement bar 28 is connected with piston 29 in one end of piston internal tank, is connected with displacement transducer 31, control line 32 and fixed mount 33 in one end of piston external container, has coordinated capacity measurement and control.
Rock core part: experiment rock core is arranged in full-hole core clamper 15, the diameter of full-hole core clamper 15 is 75mm, and length is 300mm.One end of full-hole core clamper 15 is connected with ring press pump 16, provides confined pressure for it；Two ends are respectively provided with inlet pressure sensor 14 and outlet pressure sensor 17 simultaneously, carry out pressure measxurement to before and after leaching；The port of export arranges leaching back-pressure valve 18, and simulated formation pressure the oxygen controlled in leachant do not precipitate out；
Balance metering system 19 measures the quality of infusion solution, and experiment is automatically controlled by computer 20.
As in figure 2 it is shown, leaching solution body adds in stirring container 7 through feed liquor pipeline 6 during experiment, then oxygen and carbon dioxide are by steel cylinder 1 and 2, through high-pressure pressure-reducing valve 3, stop valve 4 and mass-flow gas meter 5, enter stirring container 7.Gas-liquid mixed is carried out at stirring container 7.Leachant dissolves after completely, with plunger displacement pump 13, fluid injection intermediate receptacle 11 is pressurizeed, and regulates pressure to identical with stirring container 6 pressure with intermediate receptacle back-pressure valve 12.Then pass through nitrogen cylinder 8 by the leachant press-in fluid injection intermediate receptacle 11 in stirring container 7.When starting to test, opening plunger pump 13 extrudes fluid injection intermediate receptacle 11 and carries out fluid injection.And by computer 20, experiment is automatically controlled.
Claims (7)
1. a ground-dipping uranium extraction leaching experiment device, it is characterized in that: mainly include source of the gas, high-pressure pressure-reducing valve (3), stop valve (4), mass-flow gas meter (5), feed liquor pipeline (6), stirring container (7), nitrogen cylinder (8), stirring container back-pressure valve (9), pneumatic operated valve (10), fluid injection intermediate receptacle (11), intermediate receptacle back-pressure valve (12), plunger displacement pump (13), pressure transducer, full-hole core clamper (15), ring press pump (16), leach back-pressure valve (18), balance metering system (19) and computer (20), wherein:
Air-source inflow part: source of the gas includes oxygen source (1) and carbon dioxide air source (2), two sources of the gas form air-source inflow part with high-pressure pressure-reducing valve (3), stop valve (4) and mass-flow gas meter (5) respectively successively, and then common entrance stirs container (7)；
Feed liquor part: stirring container (7) is connected with feed liquor pipeline (6), forms feed liquor part；The leaching solution body mixed dissolution of source gas induction part inputted by the magnetic stirring apparatus being arranged in stirring container (7) and the input of feed liquor part；
Pressure regulating part divides: the pressure of dissolving is controlled by the agitated container back-pressure valve (9) of nitrogen cylinder (8), and decomposition pressure regulates part；When gas dissolves after completely, under nitrogen pressure effect, leachant press-in fluid injection intermediate receptacle (11) completely will be dissolved；
Pressures partially: plunger displacement pump (13) is connected with intermediate receptacle back-pressure valve (12) and fluid injection intermediate receptacle (11) successively, entrance point and the port of export at fluid injection intermediate receptacle (11) arrange pneumatic operated valve (10), form pressures partially；The pressure provided by intermediate receptacle back-pressure valve (12) pilot plunger pump (13) during experiment is identical with stirring pressure in container (7) to pressure in fluid injection intermediate receptacle (11), then passes through pressure regulating part and divides and be pressed into by leaching solution in fluid injection intermediate receptacle (7)；
Rock core part: experiment rock core is arranged in full-hole core clamper (15), and one end of full-hole core clamper (15) is connected with ring press pump (16), provides confined pressure for it；Two ends are respectively provided with inlet pressure sensor (14) and outlet pressure sensor (17) simultaneously, carry out pressure measxurement to before and after leaching；The port of export arranges leaching back-pressure valve (18), and simulated formation pressure the oxygen controlled in leachant do not precipitate out；
Balance metering system (19) measures the quality of infusion solution, and experiment is automatically controlled by computer (20).
2. a kind of ground-dipping uranium extraction leaching experiment device as claimed in claim 1, it is characterised in that: the flow≤50ml/min of mass-flow gas meter (5).
3. a kind of ground-dipping uranium extraction leaching experiment device as claimed in claim 1, it is characterized in that: fluid injection intermediate receptacle (11) adopts the piston container of two same volumes, inbuilt displacement sensor carries out capacity measurement and control, after one container has been noted, automatically switch in another piston container, it is ensured that the seriality of experiment.
4. a kind of ground-dipping uranium extraction leaching experiment device as claimed in claim 1, it is characterized in that: solution presasure is adjusted by nitrogen cylinder (8) and stirring container back-pressure valve (9) by course of dissolution, control solution presasure theoretical dissolution more than the pressure 0.5MPa higher than oxygen.
5. a kind of ground-dipping uranium extraction leaching experiment device as claimed in claim 1, it is characterised in that: the diameter of full-hole core clamper (15) is 75mm, and length is 300mm.
6. a kind of ground-dipping uranium extraction leaching experiment device as claimed in claim 1, it is characterized in that: stirring container (7) upper side is provided with nitrogen inlet (26), bottom arranges stirring paddle (23), bosom is provided with block (24) and piston (25), drives stirring paddle (23) to carry out gas-liquid mixed in stirring container (7) by motor (21) and magnet rotor (22).
7. a kind of ground-dipping uranium extraction leaching experiment device as claimed in claim 1, it is characterized in that: fluid injection intermediate receptacle (11) adopts the piston container of two same volumes, piston container head is provided with snap joint (30), bottom is provided with liquid in-out mouth (27), the internal piston (29) arranged with piston container nested encryptions and displacement bar (28), displacement bar (28) is connected with piston (29) in one end of piston internal tank, at one end of piston external container and displacement transducer (31), control line (32) and fixed mount (33) connect, capacity measurement and control are coordinated.
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