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 PDF

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Publication number
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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CN106401510B (en
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苏学斌
李喜龙
张勇
高险峰
马连春
张渤
曹俊鹏
王凯
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Center Tongliao You Ye LLC
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    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B21/00Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/06Arrangements for treating drilling fluids outside the borehole
    • E21B21/063Arrangements for treating drilling fluids outside the borehole by separating components
    • E21B21/065Separating solids from drilling fluids

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  • 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

The method that ground-dipping uranium extraction well-flushing waste water recycles
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%.
CN201610824438.0A 2016-09-13 2016-09-13 The method that ground-dipping uranium extraction well-flushing waste water recycles Active CN106401510B (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
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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CN103193289A (en) * 2013-04-23 2013-07-10 清华大学 Method for recycling uranium in uranium-contained waste water
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CN105859069A (en) * 2016-04-21 2016-08-17 中核通辽铀业有限责任公司 Harmless treatment method of drilling mud produced by in-situ leaching uranium exploration

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WO2004046045A1 (en) * 2002-11-15 2004-06-03 Aquenox Pty Ltd Radioactive species removal process
CN101597113A (en) * 2009-06-27 2009-12-09 南华大学 A kind of treatment process of uranium-containing waste water
CN103193289A (en) * 2013-04-23 2013-07-10 清华大学 Method for recycling uranium in uranium-contained waste water
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Cited By (5)

* Cited by examiner, † Cited by third party
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
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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