CN106401510A - Method for recycling well flushing waste water in in-situ leaching uranium exploration - Google Patents
Method for recycling well flushing waste water in in-situ leaching uranium exploration Download PDFInfo
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- CN106401510A CN106401510A CN201610824438.0A CN201610824438A CN106401510A CN 106401510 A CN106401510 A CN 106401510A CN 201610824438 A CN201610824438 A CN 201610824438A CN 106401510 A CN106401510 A CN 106401510A
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- enters
- waste water
- clear liquid
- well
- liquid
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Links
- 238000000034 method Methods 0.000 title claims abstract description 47
- 239000002351 wastewater Substances 0.000 title claims abstract description 43
- 229910052770 Uranium Inorganic materials 0.000 title claims abstract description 42
- JFALSRSLKYAFGM-UHFFFAOYSA-N uranium(0) Chemical compound [U] JFALSRSLKYAFGM-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 238000011010 flushing procedure Methods 0.000 title claims abstract description 39
- 238000002386 leaching Methods 0.000 title abstract description 6
- 238000011065 in-situ storage Methods 0.000 title abstract 3
- 238000004064 recycling Methods 0.000 title abstract 2
- 239000007788 liquid Substances 0.000 claims abstract description 74
- 239000007924 injection Substances 0.000 claims abstract description 22
- 238000002347 injection Methods 0.000 claims abstract description 22
- 239000004576 sand Substances 0.000 claims abstract description 21
- 238000001914 filtration Methods 0.000 claims abstract description 20
- 238000001704 evaporation Methods 0.000 claims abstract description 13
- 230000008020 evaporation Effects 0.000 claims abstract description 13
- 238000004140 cleaning Methods 0.000 claims abstract description 11
- 239000002002 slurry Substances 0.000 claims abstract description 6
- 239000000243 solution Substances 0.000 claims abstract description 6
- 239000002699 waste material Substances 0.000 claims abstract 2
- 238000007598 dipping method Methods 0.000 claims description 29
- 238000000605 extraction Methods 0.000 claims description 28
- 238000004062 sedimentation Methods 0.000 claims description 25
- 238000009826 distribution Methods 0.000 claims description 20
- 239000012530 fluid Substances 0.000 claims description 17
- 239000006228 supernatant Substances 0.000 claims description 12
- 239000007787 solid Substances 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 9
- 238000011001 backwashing Methods 0.000 claims description 5
- 238000005352 clarification Methods 0.000 claims description 5
- 238000011049 filling Methods 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 5
- 239000008187 granular material Substances 0.000 claims 1
- 230000007613 environmental effect Effects 0.000 abstract description 5
- 238000011084 recovery Methods 0.000 abstract description 4
- 238000005086 pumping Methods 0.000 abstract 1
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000004065 wastewater treatment Methods 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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/06—Arrangements for treating drilling fluids outside the borehole
- E21B21/063—Arrangements for treating drilling fluids outside the borehole by separating components
- E21B21/065—Separating solids from drilling fluids
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Treatment Of Sludge (AREA)
- Physical Water Treatments (AREA)
Abstract
The invention provides a method for recycling well flushing waste water in in-situ leaching uranium exploration. The method comprises the steps that (a), well flushing waste water of a liquid pumping well and a liquid injection well for in-situ leaching uranium exploration is elevated to the ground surface and then settles through a settling basin, and underflow slurry of the settling basin is drained into an evaporation pond; (b) clean liquid 1 is fed into a hydrocyclone, clean liquid 2 discharged out from the hydrocyclone enters the step (c), and a sand-containing solution discharged out from the hydrocyclone returns to the settling basin for closed cycle treatment; (c) the clean liquid 2 enters a self-cleaning filter, clean liquid 3 is obtained through filtering and enters the step (d), and waste liquid generated by automatic reverse flushing enters the hydrocyclone for closed cycle treatment; (d) the clean liquid 3 enters a bag filter, and clean liquid 4 obtained through filtering enters a buffer pool; and (e) the clean liquid 4 in the buffer pool enters the liquid injection well through high-pressure injection. By means of the method, zero emission of waste water is realized, and the problems that due to outwards drainage of well flushing waste water, an evaporation pond occupies the land, environmental issues are caused and uranium recovery is difficult are solved.
Description
Technical field
The invention belongs to the method for wastewater treatment of ground-dipping uranium extraction, it is related to the side that the well-flushing waste water in Uranium field recycles
Method is and in particular to a kind of method that recycles of ground-dipping uranium extraction well-flushing waste water.
Background technology
Ground-dipping uranium extraction is by drilling engineering, by chemical reagent, from natural mode of occurence, the uranium in Ore is dissolved
Out, and Ore is not made to produce the centralized procurement of displacement, smelting in the uranium mining method of one.Borehole engineering is ground-dipping uranium extraction technology
Core.By borehole engineering not only exposing ore bed acquirement geology, hydrogeological data formation process boring, can also note to ore bed
Enter chemical reagent molten leaching Ore, lifting leachate obtains uranium metal and forms producing well.
In ground dipping uranium extracting process, after either holing into well, still in process of production, can produce in a large number during boring well-flushing
Waste water, the main object of boring well-flushing is filter segment, therefore, contains a small amount of uranium, conventional treatment method is logical in waste water
Cross pipeline well-flushing waste water is emitted in evaporation tank, processed by way of natural evaporation.
The method to some extent solves the problem that well-flushing waste water processes, arbitrarily discharges, but the developing with exploiting field,
Well-flushing waste water amount is big, and the mode of natural evaporation can not meet the demand of production, there are many unsafe factors, and the uranium of leaching is not yet
Can effectively be reclaimed, simultaneously to environmental conservation, levy land occupation aspect and adversely affect.
In order to realize that limited synthetical recovery is carried out to the uranium leaching, reduce evaporation tank construction and reduce environmental protection risk, send out
Clear ground-dipping uranium extraction well-flushing waste water circulation utilization method.
Content of the invention
It is an object of the invention to provide the side that a kind of ground-dipping uranium extraction well-flushing waste water realizing wastewater zero discharge recycles
Method.
Realize the technical scheme of the object of the invention:A kind of method that ground-dipping uranium extraction well-flushing waste water recycles, it include as
Lower step:
A the well-flushing waste water of the taking out of ground-dipping uranium extraction, fluid injection well is promoted to earth's surface by (), then settle through Sedimentation tank, Sedimentation tank
Underflow slurry enters evaporation tank, and the Sedimentation tank supernatant 1 enters step (b);
B hydrocyclone is sent in () supernatant 1, in hydrocyclone, clear liquid 2 out enters step (c);Waterpower is revolved
The out solution containing sand of stream device returns Sedimentation tank, carries out a closed cycle and processes;
C () clear liquid 2 enters self-cleaning filter, obtain clear liquid 3 after filtering and enter step (d);Useless through automatic back-washing
Liquid enters hydrocyclone, carries out a closed cycle and processes;
D () clear liquid 3 enters bag filter, filter gained clear liquid 4 and enter Buffer Pool;
E the clear liquid 4 in () Buffer Pool enters fluid injection well through high pressure fluid injection, liquid filling pressure is more than 1.7MPa.
A kind of method that ground-dipping uranium extraction well-flushing waste water recycles as above, its described step (a) is through Sedimentation tank
After clarification, the amount containing mud (sand) of the supernatant 1 is less than 4.2%~5.3%, and grain class distribution be more than 50 μm account for 75%~
90%.
A kind of method that ground-dipping uranium extraction well-flushing waste water recycles as above, its described step (b) is revolved through waterpower
Stream solid-liquid separation after, clear liquid 2 containing mud (sand) amount be less than 1.2%~1.9%, and grain class distribution be more than 50 μm account for 10.5
~20%.
A kind of method that ground-dipping uranium extraction well-flushing waste water recycles as above, its described step (c) self-cleaning
Filter precision is 50 μm, and after filtering, the amount containing mud (sand) of clear liquid 3 is less than 0.7%~1%, and solid particle grain class distribution is big
In 50 μm account for 2.3%~4.7%.
A kind of method that ground-dipping uranium extraction well-flushing waste water recycles as above, its described step (d) is through pocket type mistake
Filter filter after, clear liquid 4 solid particle grain class distribution be more than 10 μm account for 5.8%~10.3%.
Effect of the invention is that:The method that ground-dipping uranium extraction well-flushing waste water of the present invention recycles, it makes well-flushing
During the waste water that produces pass through the method re-injection and hole to fluid injection, realize the zero-emission of waste water, solve to arrange outside well-flushing waste water and make
A difficult problem for the recovery of land occupation, environmental issue and uranium levied by the evaporation tank becoming.
Brief description
Fig. 1 is a kind of ground-dipping uranium extraction well-flushing waste water circulation utilization method flow chart of the present invention.
Specific embodiment
With specific embodiment, a kind of ground-dipping uranium extraction well-flushing waste water of the present invention is recycled below in conjunction with the accompanying drawings
Method is further described.
Embodiment 1
As shown in figure 1, the method that a kind of ground-dipping uranium extraction well-flushing waste water of the present invention recycles, it includes walking as follows
Suddenly:
A the well-flushing waste water of the taking out of ground-dipping uranium extraction, fluid injection well is promoted to earth's surface by (), then settle through Sedimentation tank, Sedimentation tank
Underflow slurry enters evaporation tank, and the Sedimentation tank supernatant 1 enters step (b);
After Sedimentation tank clarification, the amount containing mud (sand) of clear liquid 1 is less than 5.3%, and grain class distribution accounting for more than 50 μm
90%.
B hydrocyclone is sent in () supernatant 1, in hydrocyclone, clear liquid 2 out enters step (c);Waterpower is revolved
The out solution containing sand of stream device returns Sedimentation tank, carries out a closed cycle and processes;
After hydraulic cyclone solid-liquid separation, the amount containing mud (sand) of clear liquid 2 is less than 1.9%, and grain class distribution accounts for more than 50 μm
20%.
C () clear liquid 2 enters self-cleaning filter, obtain clear liquid 3 after filtering and enter step (d);Useless through automatic back-washing
Liquid enters hydrocyclone, carries out a closed cycle and processes;
Self-cleaning filtering precision is 50 μm, and after filtering, the amount containing mud (sand) of clear liquid 3 is less than 1%, and solid particle grain
Level distribution accounts for 4.7% more than 50 μm.
D () clear liquid 3 enters bag filter, filter gained clear liquid 4 and enter Buffer Pool;
After filtering through bag filter, clear liquid 4 solid particle grain class distribution accounts for 10.3% more than 10 μm.
E the clear liquid 4 in () Buffer Pool enters fluid injection well through high pressure fluid injection, liquid filling pressure is more than 1.7MPa.
Embodiment 2
As shown in figure 1, the method that a kind of ground-dipping uranium extraction well-flushing waste water of the present invention recycles, it includes walking as follows
Suddenly:
A the well-flushing waste water of the taking out of ground-dipping uranium extraction, fluid injection well is promoted to earth's surface by (), then settle through Sedimentation tank, Sedimentation tank
Underflow slurry enters evaporation tank, and the Sedimentation tank supernatant 1 enters step (b);
After Sedimentation tank clarification, the amount containing mud (sand) of clear liquid 1 is less than 4.2%, and grain class distribution accounting for more than 50 μm
75%.
B hydrocyclone is sent in () supernatant 1, in hydrocyclone, clear liquid 2 out enters step (c);Waterpower is revolved
The out solution containing sand of stream device returns Sedimentation tank, carries out a closed cycle and processes;
After hydraulic cyclone solid-liquid separation, the amount containing mud (sand) of clear liquid 2 is less than 1.2%, and grain class distribution accounts for more than 50 μm
10.5%.
C () clear liquid 2 enters self-cleaning filter, obtain clear liquid 3 after filtering and enter step (d);Useless through automatic back-washing
Liquid enters hydrocyclone, carries out a closed cycle and processes;
Self-cleaning filtering precision is 50 μm, and after filtering, the amount containing mud (sand) of clear liquid 3 is less than 0.7%, and solid particle
Grain class distribution accounts for 2.3% more than 50 μm.
D () clear liquid 3 enters bag filter, filter gained clear liquid 4 and enter Buffer Pool;
After filtering through bag filter, clear liquid 4 solid particle grain class distribution accounts for 5.8% more than 10 μm.
E the clear liquid 4 in () Buffer Pool enters fluid injection well through high pressure fluid injection, liquid filling pressure is more than 1.7MPa.
Embodiment 3
As shown in figure 1, the method that a kind of ground-dipping uranium extraction well-flushing waste water of the present invention recycles, it includes walking as follows
Suddenly:
A the well-flushing waste water of the taking out of ground-dipping uranium extraction, fluid injection well is promoted to earth's surface by (), then settle through Sedimentation tank, Sedimentation tank
Underflow slurry enters evaporation tank, and the Sedimentation tank supernatant 1 enters step (b);
After Sedimentation tank clarification, the amount containing mud (sand) of clear liquid 1 is less than 4.8%, and grain class distribution accounting for more than 50 μm
85%.
B hydrocyclone is sent in () supernatant 1, in hydrocyclone, clear liquid 2 out enters step (c);Waterpower is revolved
The out solution containing sand of stream device returns Sedimentation tank, carries out a closed cycle and processes;
After hydraulic cyclone solid-liquid separation, the amount containing mud (sand) of clear liquid 2 is less than 1.5%, and grain class distribution accounts for more than 50 μm
15%.
C () clear liquid 2 enters self-cleaning filter, obtain clear liquid 3 after filtering and enter step (d);Useless through automatic back-washing
Liquid enters hydrocyclone, carries out a closed cycle and processes;
Self-cleaning filtering precision is 50 μm, and after filtering, the amount containing mud (sand) of clear liquid 3 is less than 0.8%, and solid particle
Grain class distribution accounts for 3.0% more than 50 μm.
D () clear liquid 3 enters bag filter, filter gained clear liquid 4 and enter Buffer Pool;
After filtering through bag filter, clear liquid 4 solid particle grain class distribution accounts for 8.0% more than 10 μm.
E the clear liquid 4 in () Buffer Pool enters fluid injection well through high pressure fluid injection, liquid filling pressure is more than 1.7MPa.
The present invention makes the waste water producing in washing well process pass through the method re-injection to fluid injection boring, realizes the zero-emission of waste water
Discharge, solves to arrange, outside well-flushing waste water, the difficult problem that the recovery of land occupation, environmental issue and uranium levied by the evaporation tank causing.
Claims (5)
1. a kind of ground-dipping uranium extraction well-flushing waste water recycles method it is characterised in that:The method comprises the steps:
A the well-flushing waste water of the taking out of ground-dipping uranium extraction, fluid injection well is promoted to earth's surface by (), then settle through Sedimentation tank, Sedimentation tank underflow
Slurry enters evaporation tank, and the Sedimentation tank supernatant 1 enters step (b);
B hydrocyclone is sent in () supernatant 1, in hydrocyclone, clear liquid 2 out enters step (c);Hydrocyclone
Out solution containing sand return Sedimentation tank, carry out closed cycle and process;
C () clear liquid 2 enters self-cleaning filter, obtain clear liquid 3 after filtering and enter step (d);Waste liquid through automatic back-washing enters
Enter hydrocyclone, carry out a closed cycle and process;
D () clear liquid 3 enters bag filter, filter gained clear liquid 4 and enter Buffer Pool;
E the clear liquid 4 in () Buffer Pool enters fluid injection well through high pressure fluid injection, liquid filling pressure is more than 1.7MPa.
2. a kind of ground-dipping uranium extraction well-flushing waste water according to claim 1 recycles method it is characterised in that:Described
After Sedimentation tank clarification, the amount containing mud (sand) of the supernatant 1 is less than 4.2%~5.3% to step (a), and grain class distribution is more than
50 μm account for 75%~90%.
3. a kind of ground-dipping uranium extraction well-flushing waste water according to claim 1 recycles method it is characterised in that:Described
After hydraulic cyclone solid-liquid separation, the amount containing mud (sand) of clear liquid 2 is less than 1.2%~1.9%, and grain class distribution to step (b)
Account for 10.5~20% more than 50 μm.
4. a kind of ground-dipping uranium extraction well-flushing waste water according to claim 1 recycles method it is characterised in that:Described
Step (c) self-cleaning filtering precision is 50 μm, and after filtering, the amount containing mud (sand) of clear liquid 3 is less than 0.7%~1%, and solid
Granule grain class distribution be more than 50 μm account for 2.3%~4.7%.
5. a kind of ground-dipping uranium extraction well-flushing waste water according to claim 1 recycles method it is characterised in that:Described
Step (d) through bag filter filtration after, clear liquid 4 solid particle grain class distribution be more than 10 μm account for 5.8%~10.3%.
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CN201610824438.0A CN106401510B (en) | 2016-09-13 | 2016-09-13 | The method that ground-dipping uranium extraction well-flushing waste water recycles |
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CN201610824438.0A CN106401510B (en) | 2016-09-13 | 2016-09-13 | The method that ground-dipping uranium extraction well-flushing waste water recycles |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109763807A (en) * | 2019-01-28 | 2019-05-17 | 中核内蒙古矿业有限公司 | A kind of ground-dipping uranium extraction closed cycle pumping system and method |
CN109958406A (en) * | 2019-03-08 | 2019-07-02 | 中核通辽铀业有限责任公司 | A kind of ground-dipping uranium extraction acidification hole flushing method |
CN111549227A (en) * | 2020-04-24 | 2020-08-18 | 核工业北京化工冶金研究院 | Device and method for synchronously recovering recoverable metals in well washing water during well washing |
CN117188999A (en) * | 2023-11-07 | 2023-12-08 | 核工业北京化工冶金研究院 | Efficient well flushing method for U-shaped well for in-situ leaching uranium mining |
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Publication number | Priority date | Publication date | Assignee | Title |
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CN117188999A (en) * | 2023-11-07 | 2023-12-08 | 核工业北京化工冶金研究院 | Efficient well flushing method for U-shaped well for in-situ leaching uranium mining |
CN117188999B (en) * | 2023-11-07 | 2024-02-09 | 核工业北京化工冶金研究院 | Efficient well flushing method for U-shaped well for in-situ leaching uranium mining |
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