CN110359913A - A kind of infiltrative safe and efficient mining methods of raising low infiltration sandrock-type uranium ore layer - Google Patents
A kind of infiltrative safe and efficient mining methods of raising low infiltration sandrock-type uranium ore layer Download PDFInfo
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- CN110359913A CN110359913A CN201910673538.1A CN201910673538A CN110359913A CN 110359913 A CN110359913 A CN 110359913A CN 201910673538 A CN201910673538 A CN 201910673538A CN 110359913 A CN110359913 A CN 110359913A
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- 229910052770 Uranium Inorganic materials 0.000 title claims abstract description 162
- JFALSRSLKYAFGM-UHFFFAOYSA-N uranium(0) Chemical compound [U] JFALSRSLKYAFGM-UHFFFAOYSA-N 0.000 title claims abstract description 162
- 230000008595 infiltration Effects 0.000 title claims abstract description 59
- 238000001764 infiltration Methods 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 title claims abstract description 43
- 238000005065 mining Methods 0.000 title claims abstract description 32
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 51
- 230000035699 permeability Effects 0.000 claims abstract description 51
- 238000002386 leaching Methods 0.000 claims abstract description 38
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 34
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 27
- 238000005553 drilling Methods 0.000 claims abstract description 27
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 25
- 239000007788 liquid Substances 0.000 claims abstract description 25
- 238000012545 processing Methods 0.000 claims abstract description 25
- 239000000243 solution Substances 0.000 claims abstract description 14
- 230000009466 transformation Effects 0.000 claims abstract description 14
- 230000000694 effects Effects 0.000 claims abstract description 11
- 238000006243 chemical reaction Methods 0.000 claims abstract description 6
- 238000002347 injection Methods 0.000 claims abstract description 6
- 239000007924 injection Substances 0.000 claims abstract description 6
- 230000005540 biological transmission Effects 0.000 claims description 17
- 230000005284 excitation Effects 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 238000004880 explosion Methods 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000003999 initiator Substances 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 239000006004 Quartz sand Substances 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 238000005336 cracking Methods 0.000 claims description 2
- 238000000605 extraction Methods 0.000 abstract description 22
- 238000005516 engineering process Methods 0.000 abstract description 13
- 238000012360 testing method Methods 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000007598 dipping method Methods 0.000 description 17
- 238000005086 pumping Methods 0.000 description 8
- 238000011065 in-situ storage Methods 0.000 description 7
- 229910052500 inorganic mineral Inorganic materials 0.000 description 7
- 239000011707 mineral Substances 0.000 description 7
- 230000020477 pH reduction Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 229910001748 carbonate mineral Inorganic materials 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 238000009738 saturating Methods 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 240000005373 Panax quinquefolius Species 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- GCNLQHANGFOQKY-UHFFFAOYSA-N [C+4].[O-2].[O-2].[Ti+4] Chemical compound [C+4].[O-2].[O-2].[Ti+4] GCNLQHANGFOQKY-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 210000000481 breast Anatomy 0.000 description 1
- 239000002734 clay mineral Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010828 elution Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 210000000867 larynx Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000009418 renovation Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
- E21B43/267—Methods for stimulating production by forming crevices or fractures reinforcing fractures by propping
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
- E21C41/22—Methods of underground mining; Layouts therefor for ores, e.g. mining placers
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Geochemistry & Mineralogy (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Remote Sensing (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
- Physical Water Treatments (AREA)
Abstract
The present invention provides a kind of infiltrative safe and efficient mining methods of raising low infiltration sandrock-type uranium ore layer, the following steps are included: step S1, prospecting geological conditions, the specific location for determining low infiltration sandrock-type uranium ore layer to be exploited arranges drilling to the length direction of earth's surface to uranium ore layer；Step S2, the liquid carbon dioxide phase transformation fracturing containing proppant is implemented to uranium ore layer by drilling, carries out increasing permeability processing for the first time；Step S3, ultrasonic cavitation effect is applied to uranium ore layer, carries out second and increases permeability processing；Step S4, leaching agent injection is dissolved the uranium in ore, then the uranium-bearing leaching solution after reaction is extracted and purified, obtains pure uranium by increasing permeability treated uranium ore layer twice；The present invention shortens the test period improving the overall permeability energy of low infiltration sandrock-type uranium ore layer, improving Uranium extraction rate and adopting uranium production efficiency using the liquid carbon dioxide phase transformation fracturing technology containing proppant and auxiliary ultrasonic cavitation.
Description
Technical field
The invention belongs to ground-dipping uranium extraction technical fields, and in particular to a kind of raising low infiltration sandrock-type uranium ore layer is infiltrative
Safe and efficient mining methods.
Background technique
Currently, ground-dipping uranium extraction technology is as a kind of important method adopted in uranium field, especially for aqueous and have certain
When infiltrative sandrock-type uranium deposit, ground-dipping uranium extraction has more benefit compared to other uranium extraction methods.Ground-dipping uranium extraction is past by drilling
Ore bed injection leaching agent chemically reacts it with uranium bearing mineral, dissolves the uranium in ore, is then evacuated to the solution of uranium-bearing
Earth's surface, then be further processed and adopt smelting process extract and recycle uranium metal.
One of the key factor of evaluation ground-dipping uranium extraction applicability is exactly the permeance property of ore bed (ore).Under normal conditions,
The in-situ leach mining of low infiltration sandrock-type uranium ore layer can lead to the pumping resistance increase that drills, leaching agent flowing because permeability is lower
Property is weaker, it is difficult to it is come into full contact with the uranium in ore, it is low so as to cause resource recovery.With deepening continuously for investigation and prospecting,
Low infiltration sandrock uranium ore resource occupy China verified SANDSTONE URANIUM DEPOSITS resource ratio it is increasing, this have become restricting current I
An important factor for state's ground-dipping uranium extraction production capacity.Low infiltration sandrock uranium ore layer generally has clay mineral content height, serious heterogeneity, hole
The features such as larynx is tiny, capillarity is prominent, leaching solution flow resistance is big, this cause leaching solution be difficult to effectively to pass through ledge with
Uranium bearing mineral reacts, to cause the ground-dipping uranium extraction of low infiltration sandrock uranium deposit at high cost, exploitation rate and resource reclaim
Rate is low, seriously hinders the comprehensive exploitation and utilization of China's sandstone-type uranium ore resources.
For improving and improving the permeance property of low infiltration sandrock-type uranium deposit, more references petroleum domestic at present, naturally
The physics in gas field, chemical seepage increasing method, including hydraulic fracturing technology, High-Energy Gas Fracturing Technology, compound technique of perforating, explosion
Loosening technology, " in layer " explosion renovation technique, low frequency pulse wave reinforcement technique and surfactant configure novel leachate etc., lead to
These physics, chemical anatonosis technology can improve ore bed permeability to a certain extent, but can only generally carry out an anatonosis, nothing
The uranium inside blind area that method forms its small range carry out capture and Part Methods there is also waste of resource and pollution resource lack
It falls into, furthermore ground-dipping uranium extraction engineering is physics-chemical reaction combined process, not only includes that underground fluid migrates, more attaches most importance to
What is wanted is the chemical reaction that object element occurs in leaching agent and ore.Therefore the above physics seepage increasing method is solely depended on,
The not ideal style of ground dipping uranium extracting process.
Currently, only find that the liquid carbon dioxide phase transformation fracturing technology containing proppant is tentatively used in coal mine field, and
Ultrasonic cavitation, which acts on vacuum preloading soft soil foundation drain bar silting, which administers aspect, has significant improvement.And
There is not yet improving the infiltrative research of low infiltration sandrock-type uranium deposit using above-mentioned integrated approach in terms of ground-dipping uranium extraction engineering.
With making constant progress for China's core cause, the strategic position of uranium ore resource is risen rapidly, it is necessary to be paid attention to hypotonic
The exploitation and utilization of saturating sandstone-type uranium ore resources.Evaluating one of key factor of ground-dipping uranium extraction applicability is exactly ore bed (ore)
Permeance property, at present for the in-situ leach mining of low infiltration sandrock-type uranium deposit or a technical problem.Due to hyposmosis
Complex pore structure, the pore throat of sandstone are narrow, cause the leaching solution flow resistance configured according to conventional leaching agent big, small
The infiltration rate of solution can significantly reduce or even be difficult to effectively to pass through in hole and capillary channel, to reduce solution flowing speed
Rate even forms " molten leaching dead zone ", seriously affects Uranium extraction rate and production efficiency.
Accordingly, it is desirable to provide a kind of be directed to the insufficient improved technology scheme of the above-mentioned prior art.
Summary of the invention
The purpose of the present invention is to provide a kind of infiltrative safe and efficient mining sides of raising low infiltration sandrock-type uranium ore layer
Method, complicated to solve current low infiltration sandrock-type uranium ore layer gap structure, capillarity is prominent, and a small range uranium ore layer is difficult to
Capture, leaching solution flow resistance is big, and ground-dipping uranium extraction is at high cost, exploitation rate is slow, adopts that Uranium extraction rate and production efficiency are low to ask
Topic.
To achieve the goals above, the invention provides the following technical scheme:
A kind of infiltrative safe and efficient mining methods of raising low infiltration sandrock-type uranium ore layer, the method includes following steps
It is rapid:
Step S1, geological conditions is reconnoitred, the specific location of low infiltration sandrock-type uranium ore layer to be exploited is determined, to earth's surface to uranium
The length direction of ore bed arranges drilling；
Step S2, the liquid carbon dioxide phase transformation fracturing containing proppant is implemented to uranium ore layer by drilling, carried out for the first time
Increase permeability processing；
Step S3, it is turned into applying to increase permeability treated uranium ore layer for the first time and apply ultrasonic air in step S2
With second of increase permeability processing of progress；
Step S4, permeability will be increased treated uranium ore layer by second in leaching agent injection step S3, and wait open
Mining object reacts, and dissolves the uranium in ore, then the uranium-bearing leaching solution after reaction is extracted and purified, obtains pure uranium.
The infiltrative safe and efficient mining methods of low infiltration sandrock-type uranium ore layer are being improved as described above, it is preferable that described
Carrying out the specific steps that increase permeability is handled for the first time to uranium ore layer in step S2 includes:
Step S21, liquid carbon dioxide is filled in fracturing pipe, and adds Selid propping agent into the fracturing pipe,
The fracturing pipe for being loaded with Selid propping agent is placed in the drilling, and is buried；
Step S22, the fracturing pipe is heated, cubical expansion after making liquid carbon dioxide gasify, carbon dioxide goes out institute
It states fracturing pipe and discharges, generate blast cracking；
Preferably, the fracturing pipe is heated using initiator in the step S22.
The infiltrative safe and efficient mining methods of low infiltration sandrock-type uranium ore layer are being improved as described above, it is preferable that described
The intraductal pressure of fracturing pipe is 8-10MPa in step S21.
The infiltrative safe and efficient mining methods of low infiltration sandrock-type uranium ore layer are being improved as described above, it is preferable that described
Selid propping agent accounts for a quarter of the volume of the fracturing pipe.
The infiltrative safe and efficient mining methods of low infiltration sandrock-type uranium ore layer are being improved as described above, it is preferable that step
Carrying out the specific steps that second increases permeability processing to uranium ore layer in S3 includes:
Step S31, water is installed additional in ultrasonic cavitation pipe, the ultrasonic cavitation pipe is placed in the drilling, and
Ultrasonic wave excitation device is installed in ultrasonic cavitation pipe upper end, the ultrasonic wave excitation device is connect with ultrasonic transmission device；
Step S32, the ultrasonic transmission device is opened, the ultrasonic transmission device promotes the ultrasonic wave excitation device
Ultrasonic wave is generated, the hydrone in the ultrasonic cavitation pipe occurs to shake and generate bubble, until the ultrasonic cavitation pipe
Explosion occurs.
The infiltrative safe and efficient mining methods of low infiltration sandrock-type uranium ore layer are being improved as described above, it is preferable that described
Ultrasonic cavitation pipe is identical as the diameter of the fracturing pipe and length dimension.
The infiltrative safe and efficient mining methods of low infiltration sandrock-type uranium ore layer are being improved as described above, it is preferable that described
The water surface elevation of installation of water in ultrasonic cavitation pipe is identical as the face layer of the uranium seam thickness.
The infiltrative safe and efficient mining methods of low infiltration sandrock-type uranium ore layer are being improved as described above, it is preferable that described
The ultrasonic frequency that ultrasonic transmission device uses in step S32 is 40kHz.
The infiltrative safe and efficient mining methods of low infiltration sandrock-type uranium ore layer are being improved as described above, it is preferable that described
Drilling, it is multiple to be provided with, and the spacing between the adjacent drilling is 80-100m.
The infiltrative safe and efficient mining methods of low infiltration sandrock-type uranium ore layer are being improved as described above, it is preferable that described
Selid propping agent is steel ball, haydite or quartz sand.
Compared with the immediate prior art, technical solution provided by the invention has following excellent effect:
The present invention is first with liquid carbon dioxide phase transformation fracturing technology of the implementation containing proppant to low infiltration sandrock-type uranium
Ore bed permeability carries out first time increase permeability, applies auxiliary ultrasonic cavitation again and increases infiltration to first time has been carried out
The low infiltration sandrock-type uranium ore layer permeability of permeability carries out second and increases permeability, is not exclusively destroying low infiltration sandrock-type uranium
Under the premise of ore bed structure, increase overall permeability as far as possible, reaches and improve low-permeability Sandstone Uranium ore bed permeability and uranium
The effect of leaching rate.
Uranium extraction method of the invention is using the liquid carbon dioxide phase transformation fracturing technology containing proppant and combines ultrasonic air
The synergy for changing effect finally uses in-situ leach mining to improve the overall permeability energy of low infiltration sandrock-type uranium ore layer again
Method carries out uranium ore layer to adopt uranium, improves Uranium extraction rate and adopts uranium production efficiency, shortens the test period, make low infiltration sandrock-type uranium
Ore resources are able to smoothly exploit and utilize.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present invention, and of the invention shows
Examples and descriptions thereof are used to explain the present invention for meaning property, does not constitute improper limitations of the present invention.Wherein:
Fig. 1 is position view of the ultrasonic cavitation pipe of the embodiment of the present invention in uranium ore layer.
In figure: 1, earth's surface；2, ultrasonic cavitation pipe；3, water；4, uranium ore layer.
Specific embodiment
The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described implementation
Example is only a part of the embodiments of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is general
Logical technical staff's every other embodiment obtained, shall fall within the protection scope of the present invention.
The present invention will be described in detail below with reference to the accompanying drawings and embodiments.It should be noted that in the feelings not conflicted
Under condition, the feature in embodiment and embodiment in the present invention be can be combined with each other.
In the description of the present invention, term " longitudinal direction ", " transverse direction ", "upper", "lower", "front", "rear", "left", "right", " perpendicular
Directly ", the orientation or positional relationship of the instructions such as "horizontal", "top", "bottom" is to be based on the orientation or positional relationship shown in the drawings, only
It is of the invention for ease of description rather than requires the present invention that must be constructed and operated in a specific orientation, therefore should not be understood as
Limitation of the present invention.Term used in the present invention " connected ", " connection " shall be understood in a broad sense, for example, it may be fixed connect
It connects, may be a detachable connection；It can be directly connected, can also be indirectly connected by intermediate member, for this field
For those of ordinary skill, the concrete meaning of above-mentioned term can be understood as the case may be.
According to an embodiment of the invention, providing, a kind of raising low infiltration sandrock-type uranium ore layer is infiltrative safe and efficient to be adopted
Mine method, comprising the following steps:
Step S1, geological conditions is reconnoitred in detail, the specific location of low infiltration sandrock-type uranium ore layer 4 to be exploited is determined, from ground
Table 1 to 4 length direction of uranium ore layer arranges multiple drillings, implements the liquid carbon dioxide containing proppant to uranium ore layer 4 so as to subsequent
Phase transformation fracturing carries out increasing permeability processing for the first time；In a specific embodiment of the present invention, drilling is provided with multiple, adjacent
Spacing between two drillings is 80-100m, and the depth of drilling is the bosom of the thickness of uranium ore layer.
Step S2, increase permeability processing for the first time:
The liquid carbon dioxide phase transformation fracturing containing proppant is implemented to uranium ore layer 4 by drilling, increase for the first time and seeps
Permeability processing, specific steps include:
Step S21, liquid carbon dioxide and addition Selid propping agent are filled:
Using liquid carbon dioxide filling station and connection equipment, in a specific embodiment of the present invention, the fracturing pipe of selection
For repeatable fracturing pipe, liquid carbon dioxide is filled in repeatable fracturing pipe, and by connection equipment to repeatable
Property fracturing pipe in add Selid propping agent, repeatable fracturing pipe and Selid propping agent are transported to drilling, then to Sheng
Repeatable fracturing pipe equipped with Selid propping agent is buried.
In a specific embodiment of the present invention, Selid propping agent is steel ball, certainly Selid propping agent in other embodiments
It is also possible to haydite or quartz sand.
In a specific embodiment of the present invention, the dosage of Selid propping agent account for repeatable fracturing pipe volume be four/
One, in conjunction with practical operation feasibility, the dosage of Selid propping agent is determined as to cause a quarter of tubulation volume, in order to explosion
Carbon dioxide gas be sufficiently mixed with.
Step S22, the liquid carbon dioxide phase transformation fracturing containing proppant:
Liquid carbon dioxide is loaded by filling station into repeatable fracturing pipe enclosed inside, and repeatable fracturing pipe is
The intraductal pressure of metal tube, fracturing pipe is 8-10MPa, outside safe distance range, triggers initiator using cell voltage (9V)
Repeatable fracturing pipe is heated, transient heating is carried out to fracturing pipe and its temperature is made to reach 31.2 DEG C, interior liquid titanium dioxide
Carbon transient evaporation, cubical expansion expand, and pressure increased dramatically in repeatable fracturing pipe, and pressure moment reaches 160-270MPa,
Until high pressure gas breaks through the level pressure shearing piece of repeatable fracturing tube end and the venthole release by unloading energy head, moment is produced
Raw strong impact power sprays along the self-open of rock mass or the caused crack of impact, and is pushed away main body, to reach quick-fried
The purpose of broken fracturing.
Step S3, increase permeability processing second:
Increase permeability treated uranium ore layer 4 for the first time to applying in step S2 and apply ultrasonic cavitation effect, into
Second of increase permeability processing of row, having step includes:
Step S31, ultrasonic transmission device is installed:
Ultrasonic cavitation pipe 2, is then placed in drilling by the refillable water 3 in ultrasonic cavitation pipe 2, as shown in Figure 1, super
The bottom of sound wave cavitation pipe 2 is consistent with the depth of drilling, installs ultrasonic wave excitation device in 2 upper end opening of ultrasonic cavitation pipe, leads to
It crosses connecting line and connect ultrasonic wave excitation device with ultrasonic transmission device, continued with will pass through ultrasonic transmission device excitation and generate
The stable ultrasonic wave of property.
In a specific embodiment of the present invention, the diameter and length dimension of ultrasonic cavitation pipe 2 and repeatable fracturing pipe
It is identical, convenient for ultrasonic cavitation pipe 2 and repeatable fracturing pipe are put into drilling；Ultrasonic cavitation pipe 2 is common metal pipe,
Repeatable fracturing pipe and the length of ultrasonic cavitation pipe 2 and the length of drilling are identical, repeatable fracturing pipe and ultrasonic air
The diameter for changing pipe 2 is identical as the aperture of drilling.
In a specific embodiment of the present invention, the water surface elevation Yu 4 thickness of uranium ore layer of built-in 3 amount of water of ultrasonic cavitation pipe 2
Face layer it is identical, so as to abundant explosion is carried out in 4 thickness of uranium ore layer, i.e., it is more sufficiently thorough to increase permeability processing second
Bottom.
Step S32, ultrasonic cavitation effect:
Ultrasonic transmission device is opened, ultrasonic transmission device promotes ultrasonic wave excitation device to generate the stable ultrasound of duration
Wave, the ultrasonic frequency that ultrasonic transmission device uses is 40kHz, and hydrone occurs in ultrasonic cavitation pipe 2 under this frequency
Countless tiny bubbles are shaken and generate, ultrasonic transmission device continues working until explosion occurs for bubble, to its generation cavitation work
Ultrasonic wave is generated with rear stopping.
The ultrasonic direction of wave travel in hydrone bubble edge is generated in negative pressuren zone formation, growth in zone of positive pressure rapid closing
The instantaneous pressures of thousands of a atmospheric pressure and explosion, form countless microcosmic high-pressure shocking waves and act on 2 surface of ultrasonic cavitation pipe simultaneously
It goes out, huge impact force to the self-open of rock mass or impacts caused crack injection again, and i.e. ultrasonic wave and liquid are sent out for this
Raw " cavitation effect " has carried out 4 permeability of low infiltration sandrock-type uranium ore layer second by applying ultrasonic cavitation effect
Increase permeability processing.
Step S4, increase permeability treated that uranium ore layer 4 carries out in-situ leach mining to applying second in step S3.
According to the mineral situation of the uranium ore layer 4 of exploration, by leaching agent injection, by second of increase permeability, treated
Uranium ore layer 4, reacts with to mining mineral, dissolves the uranium in ore, then extracts the uranium-bearing leaching solution after reaction to ground
Off-balancesheet, the uranium-bearing leaching solution extracted i.e. pumping liquid are sent into recovery workshop and carry out ion exchange, elution, precipitating, filters pressing, dry,
Finally obtain high-purity uranium.
During in-situ leach mining, according to CO in the carbonate mineral in uranium ore layer 42Content chooses different leachings
Agent, with CO in usual carbonate mineral content2When counting < 2%, using acid system (H2SO4、HCl、HNO3One of) configuration leaching
Agent ground-dipping uranium extraction；When carbonate mineral content is with CO2When meter >=2%, leaching agent (Na is configured using alkaline process2CO3And NaHCO3's
Mixture, (NH4)2CO3And NH4HCO3Mixture), neutrality (CO2+O2) when leached and adopt using one of two kinds of ground dipping uranium extracting process
Uranium.
Embodiment 1
The uranium grade of Inner Mongol low infiltration sandrock-type uranium deposit be 0.0242%, uranium ore infiltration coefficient be 0.763~
0.951m/d；Carrying out ground-dipping uranium extraction process to the ground, specific step is as follows:
(1) drilling exploitation is carried out to it after determining the position of low infiltration sandrock-type uranium ore layer 4, in repeatable fracturing pipe
Selid propping agent haydite particles are added, is then filled in repeatable fracturing pipe into liquid carbon dioxide, utilizes initiator
Repeatable fracturing pipe is heated, until liquid carbon dioxide phase transformation is gasified, to 4 mineral fracturing of uranium ore layer, utilizes phase transformation fracturing
Technology carries out uranium ore layer 4 to increase permeability processing for the first time；
Ultrasonic transmission device is installed, installs water 3 additional in ultrasonic cavitation pipe 2, and install in 2 upper end of ultrasonic cavitation pipe
Ultrasonic wave excitation device, ultrasonic wave excitation device are connect with ultrasonic transmission device, carry out exciting to 33 molecule of water, rush brings it about super
Sound wave cavitation carries out second to uranium ore layer 4 and increases permeability processing, to improve low infiltration sandrock-type uranium ore layer 4
Overall permeability energy.
(2) according to this geologic characteristic of mineral deposit, determine in-situ acid uranium leaching technology path, the acidification phase use mass concentration for
0.5%H2SO4As leaching agent, the phase of leaching uses mass concentration for 1%H2SO4As leaching agent；
(3) acidification phase pumping flow quantity is 5~7m3/ h lasts 30 days.
(4) leaching phase pumping flow quantity is 8~10m3/ h, leachate uranium concentration reach peak concentration 80mg/L, last 22
It；Leachate uranium concentration is down to 7mg/L, lasts 80 days.
(5) uranium grade is 0.0060% most in finishing slag, and leaching rate 82.9%, ore bed permeance property obviously changes during test
It is kind, it is handled in 4 the present embodiment of uranium ore layer for increasing permeability processing with second compared to permeability is increased without first time
Average infiltration coefficient improve 46.5%, pumping fluid pressure is eased, the leaching test period compare without anatonosis handle
Shorten 20%.
Embodiment 2
The uranium grade of Inner Mongol low infiltration sandrock-type uranium deposit is 0.0527%, and uranium ore infiltration coefficient is 0.165
~0.312m/d；Carrying out ground-dipping uranium extraction process to the ground, specific step is as follows:
(1) with using in embodiment 1, identical first time increases permeability processing and second increases permeability processing side
Formula is made using the liquid carbon dioxide phase transformation fracturing technology and auxiliary ultrasonic cavitation of the steel ball containing Selid propping agent are comprehensive
With the overall permeability energy of raising low infiltration sandrock-type uranium ore layer 4.
(2) according to this geologic characteristic of mineral deposit, determine in-situ acid uranium leaching technology path, the acidification phase use mass concentration for
0.4%H2SO4As leaching agent, the phase of leaching uses mass concentration for 0.6%H2SO4As leaching agent；
(3) acidification phase pumping flow quantity is 2~3m3/ h lasts 30 days.
(4) leaching phase pumping flow quantity is 4~6m3/ h, leachate uranium concentration reach peak concentration 55mg/L, last 25
It；Leachate uranium concentration is down to 4mg/L, lasts 60 days.
(5) uranium grade is 0.0141% most in finishing slag, and leaching rate 82.9%, ore bed permeance property obviously changes during test
It is kind, compared to increasing permeability processing without first time and increase the uranium ore layer 4 of permeability processing for second, in the present embodiment
Average infiltration coefficient improve 86.5%, pumping fluid pressure is significantly alleviated, the leaching test period compare without anatonosis
Processing shortens 30%.
In summary: low infiltration sandrock-type uranium ore layer is influenced by ore bed structure, poor permeability, and leaching solution flow resistance is big,
Capillarity is prominent, and a small range uranium ore layer defies capture, and leaching agent is easy blocking ore bed, and ground-dipping uranium extraction is at high cost, opens
It is slow to adopt speed；The present invention is handled by liquid carbon dioxide phase transformation fracturing and the synergy of ultrasonic cavitation effect, to hypotonic
Saturating sandstone-type uranium ore bed carries out increasing permeability processing twice, in the premise for not exclusively destroying low infiltration sandrock-type uranium ore layer structure
Under, increase overall permeability as far as possible, and can quickly solve the problems, such as jamming of ore bed, reaches and improve low-permeability SANDSTONE URANIUM DEPOSITS
Layer permeability and the effect for adopting Uranium extraction rate；The exploitation period is shortened simultaneously, keeps low infiltration sandrock-type uranium ore resource smooth
Exploitation and utilization.
The above description is only a preferred embodiment of the present invention, is not intended to restrict the invention, for those skilled in the art
For member, the invention may be variously modified and varied.All within the spirits and principles of the present invention, it is made it is any modification,
Equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of infiltrative safe and efficient mining methods of raising low infiltration sandrock-type uranium ore layer, which is characterized in that the method
The following steps are included:
Step S1, geological conditions is reconnoitred, the specific location of low infiltration sandrock-type uranium ore layer to be exploited is determined, in earth's surface to uranium ore layer
Length direction on arrange drilling；
Step S2, the liquid carbon dioxide phase transformation fracturing containing proppant is implemented to uranium ore layer by drilling, carries out first time increase
Permeability processing；
Step S3, increase permeability treated uranium ore layer for the first time and apply ultrasonic cavitation effect to applying in step S2,
It carries out second and increases permeability processing；
Step S4, permeability will be increased treated uranium ore layer by second in leaching agent injection step S3, and to quarry
Object reacts, and dissolves the uranium in ore, then the uranium-bearing leaching solution after reaction is extracted and purified, obtains pure uranium.
2. improving the infiltrative safe and efficient mining methods of low infiltration sandrock-type uranium ore layer, feature as described in claim 1
It is, the specific steps for increase for the first time permeability processing to uranium ore layer in the step S2 include:
Step S21, liquid carbon dioxide is filled in fracturing pipe, and adds Selid propping agent into the fracturing pipe, will contained
The fracturing pipe equipped with Selid propping agent is placed in the drilling, and is buried；
Step S22, the fracturing pipe is heated, cubical expansion after making liquid carbon dioxide gasify, gaseous carbon dioxide goes out institute
It states fracturing pipe and discharges, generate blast cracking；
Preferably, the fracturing pipe is heated using initiator in the step S22.
3. improving the infiltrative safe and efficient mining methods of low infiltration sandrock-type uranium ore layer, feature as claimed in claim 2
It is, the intraductal pressure of fracturing pipe is 8-10MPa in the step S21.
4. improving the infiltrative safe and efficient mining methods of low infiltration sandrock-type uranium ore layer, feature as claimed in claim 2
It is, the Selid propping agent accounts for a quarter of the volume of the fracturing pipe.
5. the infiltrative safe and efficient mining methods of low infiltration sandrock-type uranium ore layer are improved as claimed in claim 1 or 2, it is special
Sign is that carrying out the specific steps that second increases permeability processing to uranium ore layer in step S3 includes:
Step S31, water is installed additional in ultrasonic cavitation pipe, the ultrasonic cavitation pipe is placed in the drilling, and in institute
Ultrasonic cavitation pipe upper end installation ultrasonic wave excitation device is stated, the ultrasonic wave excitation device is connect with ultrasonic transmission device；
Step S32, the ultrasonic transmission device is opened, the ultrasonic transmission device promotes the ultrasonic wave excitation device to generate
Ultrasonic wave, the hydrone in the ultrasonic cavitation pipe occurs to shake and generate bubble, until the ultrasonic cavitation pipe occurs
Explosion.
6. improving the infiltrative safe and efficient mining methods of low infiltration sandrock-type uranium ore layer, feature as claimed in claim 5
It is, the ultrasonic cavitation pipe is identical as the diameter of the fracturing pipe and length.
7. improving the infiltrative safe and efficient mining methods of low infiltration sandrock-type uranium ore layer, feature as claimed in claim 6
It is, the water surface elevation of the installation of water in the ultrasonic cavitation pipe is identical as the face layer of the uranium seam thickness.
8. improving the infiltrative safe and efficient mining methods of low infiltration sandrock-type uranium ore layer, feature as claimed in claim 5
It is, the ultrasonic frequency that ultrasonic transmission device uses in the step S32 is 40kHz.
9. improving the infiltrative safe and efficient mining methods of low infiltration sandrock-type uranium ore layer, feature as described in claim 1
It is, the drilling is provided with multiple, and spacing between the adjacent drilling is 80-100m.
10. improving the infiltrative safe and efficient mining methods of low infiltration sandrock-type uranium ore layer, feature as claimed in claim 2
It is, the Selid propping agent is steel ball, haydite or quartz sand.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112855110A (en) * | 2021-01-21 | 2021-05-28 | 石家庄铁道大学 | Permeation increasing method for sandstone-type uranium ore layer |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101338999A (en) * | 2008-08-26 | 2009-01-07 | 中国科学院武汉岩土力学研究所 | Method for blasting seepage enhancement for low infiltration sandrock -type uranium deposit |
| CN105971660A (en) * | 2016-05-05 | 2016-09-28 | 中国矿业大学 | Ultrasonic cavitation and hydrofracture combined stimulation coalbed methane extraction method |
| CN106382109A (en) * | 2016-11-21 | 2017-02-08 | 胡少斌 | Carbon dioxide stamping phase change detonation fracturing system and method |
| CN106947877A (en) * | 2016-12-27 | 2017-07-14 | 核工业北京化工冶金研究院 | A kind of method that utilization ultrasonic wave improves ground-dipping uranium extraction leaching rate |
| CN107058767A (en) * | 2016-12-26 | 2017-08-18 | 核工业北京化工冶金研究院 | One kind improves the infiltrative chemical method of low infiltration sandrock-type uranium ore layer |
| CN109707435A (en) * | 2019-01-10 | 2019-05-03 | 陕西煤业化工技术研究院有限责任公司 | A kind of sound field and hydraulic fracturing complex technique improve coal bed gas extraction system and method |
| CN109915199A (en) * | 2019-05-05 | 2019-06-21 | 河南理工大学 | Gas drainage device and its application method are strengthened in anti-reflection coal seam step by step |
-
2019
- 2019-07-24 CN CN201910673538.1A patent/CN110359913B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101338999A (en) * | 2008-08-26 | 2009-01-07 | 中国科学院武汉岩土力学研究所 | Method for blasting seepage enhancement for low infiltration sandrock -type uranium deposit |
| CN105971660A (en) * | 2016-05-05 | 2016-09-28 | 中国矿业大学 | Ultrasonic cavitation and hydrofracture combined stimulation coalbed methane extraction method |
| CN106382109A (en) * | 2016-11-21 | 2017-02-08 | 胡少斌 | Carbon dioxide stamping phase change detonation fracturing system and method |
| CN107058767A (en) * | 2016-12-26 | 2017-08-18 | 核工业北京化工冶金研究院 | One kind improves the infiltrative chemical method of low infiltration sandrock-type uranium ore layer |
| CN106947877A (en) * | 2016-12-27 | 2017-07-14 | 核工业北京化工冶金研究院 | A kind of method that utilization ultrasonic wave improves ground-dipping uranium extraction leaching rate |
| CN109707435A (en) * | 2019-01-10 | 2019-05-03 | 陕西煤业化工技术研究院有限责任公司 | A kind of sound field and hydraulic fracturing complex technique improve coal bed gas extraction system and method |
| CN109915199A (en) * | 2019-05-05 | 2019-06-21 | 河南理工大学 | Gas drainage device and its application method are strengthened in anti-reflection coal seam step by step |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112855110A (en) * | 2021-01-21 | 2021-05-28 | 石家庄铁道大学 | Permeation increasing method for sandstone-type uranium ore layer |
| CN115679135A (en) * | 2021-07-26 | 2023-02-03 | 核工业北京化工冶金研究院 | Ultrasonic enhanced leaching method for uranium ores |
| CN114152731A (en) * | 2021-12-15 | 2022-03-08 | 石家庄铁道大学 | Uranium ore carbon dioxide blasting and carbon dioxide and oxygen ground immersion mining 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 |
| CN114183118A (en) * | 2021-12-31 | 2022-03-15 | 石家庄铁道大学 | Infiltration mining method and device for infiltration-increasing area of low-permeability sandstone uranium ore and terminal equipment |
| CN114183118B (en) * | 2021-12-31 | 2024-05-24 | 石家庄铁道大学 | Enhanced-permeability in-situ leaching mining method and device for hyposmosis sandstone uranium ores and terminal equipment |
| CN115506768A (en) * | 2022-09-27 | 2022-12-23 | 重庆大学 | Supercritical CO of sandstone-type uranium ore 2 Frac-dip recovery and CO 2 Sealing and storing integrated method |
| CN115506768B (en) * | 2022-09-27 | 2024-05-10 | 重庆大学 | Sandstone type uranium ore supercritical CO2Fracturing-in-situ leaching mining and CO2Sealing and storing integrated method |
| CN115898360A (en) * | 2022-11-11 | 2023-04-04 | 核工业北京化工冶金研究院 | Pre-dredging method for in-situ leaching uranium mining ore layer of carbonate sandstone type uranium ore |
| CN116427898A (en) * | 2023-03-09 | 2023-07-14 | 核工业北京化工冶金研究院 | Flow direction control method for leaching agent in strong permeable zone of uranium leaching from sandstone uranium ore |
| CN116427898B (en) * | 2023-03-09 | 2024-03-19 | 核工业北京化工冶金研究院 | Flow direction control method for leaching agent in strong permeable zone of uranium leaching from sandstone uranium ore |
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