CN115125404B - System and method for collecting ion type rare earth ore in-situ leaching field leakage liquid - Google Patents
System and method for collecting ion type rare earth ore in-situ leaching field leakage liquid Download PDFInfo
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- CN115125404B CN115125404B CN202211068593.6A CN202211068593A CN115125404B CN 115125404 B CN115125404 B CN 115125404B CN 202211068593 A CN202211068593 A CN 202211068593A CN 115125404 B CN115125404 B CN 115125404B
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B59/00—Obtaining rare earth metals
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/02—Apparatus therefor
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/04—Extraction of metal compounds from ores or concentrates by wet processes by leaching
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
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Abstract
The application provides a system and a method for collecting ion type rare earth ore in-situ leaching field seepage liquid, and relates to the field of mine wastewater treatment. Ion type rare earth ore original place leaching field leakage liquid collecting system includes: a seepage-resistant wall, a water replenishing well and a liquid pumping well. The method for collecting the leakage liquid of the in-situ leaching field of the ionic rare earth ore comprises the following steps: arranging a seepage-blocking wall along a downstream seepage path of the in-situ leaching field, wherein the seepage-blocking wall is used for preventing seepage liquid of the in-situ leaching field from seeping downstream; a water replenishing well is arranged in the range of the downstream of the seepage-resisting wall not exceeding 20m and is used for forming a positive pressure area of the underground water level in the downstream of the seepage-resisting wall; a liquid extracting well is arranged in the range that the upstream of the seepage-resisting wall does not exceed 20m and is used for extracting solution containing in-situ leaching field leakage liquid; and the solution containing the in-situ leaching field leakage liquid extracted from the liquid extraction well is used for recovering the rare earth or sent to a tail water station for treatment. The ion type rare earth ore in-situ leaching field seepage collecting system has a good seepage intercepting effect.
Description
Technical Field
The application relates to the field of mine wastewater treatment, in particular to a system and a method for collecting leakage liquid of an ion type rare earth ore in-situ leaching field.
Background
The ion adsorption type rare earth deposit is a weathering crust formed by the strong efflorescence of volcanic rocks such as granite and the like containing rare earth under the conditions of warm and humid climate and low hills, and an ore body is generally in a completely weathered and semiweathered zone. The ionic rare earth deposit stratum sequentially comprises a full weathered layer, an intermediate weathered layer, a micro weathered layer and an unvulcanized layer from top to bottom. The method is divided into a bare-foot type rare earth ore base plate and a full-coverage type base plate according to occurrence conditions of the base plate, wherein the bare-foot type rare earth ore base plate is buried shallowly, bedrock is exposed, underground water is buried shallowly, and the underground water is exposed and enters surface water; the fully-covered rare earth ore bottom plate is buried deeply, bedrocks are not exposed, and a small amount of underground water is exposed and enters surface water and a large amount of underground water. The bare-foot type rare earth ore in-situ leaching field generally adopts a flow guide hole and a liquid collection ditch to collect liquid; the full-covering type rare earth ore in-situ leaching field generally adopts a liquid collecting roadway and a diversion hole to collect liquid. The liquid recovery rate of the bare-foot type rare earth ore in-situ leaching field is about 80 percent generally, and the liquid recovery rate of the full-coverage type rare earth ore in-situ leaching field is about 75 percent generally. Namely about 20 to 25 percent of mother liquor leaks into the underground during the leaching period, and about 20 to 25 percent of leaching tail water leaks into the underground during the leaching period. The leakage of mother liquor not only causes the loss of rare earth, but also causes the pollution of underground water.
The leaching agent ammonium sulfate or magnesium sulfate and the like are injected into the in-situ leaching field, and the leachate has high salt content, low acidity and contains pollutants such as ammonia nitrogen, sulfate, heavy metal and the like, enters underground water and diffuses downstream along with the underground water, so that the water-soil environment around the in-situ leaching field is polluted.
By adopting a conventional pumping well pumping method, a pumping well needs to be pumped to bedrock, the well depth reaches more than ten meters to dozens of meters, and the problems of large pumping well depth, poor pumping effect, low collection rate, serious downstream pollution and the like exist; by adopting the hydraulic interception measures such as the seepage interception wall, the seepage interception wall needs to be deep to bedrock, the wall needs more than ten meters deep, the problems of high construction difficulty, poor collection effect, large influence of the seepage interception wall on an underground water flow field, difficult treatment of the seepage interception wall after the service period of a mine and the like exist, the applicability is poor in places with large underground water aquifer thickness and large underground water hydraulic gradient, and the popularization and the application are difficult.
In order to efficiently collect the in-situ mine leaching field leakage liquid and control the pollution of the leakage liquid to the underground water, the underground water containing the leakage liquid is pumped out for utilization or treated to reach the discharge standard, and an efficient hydraulic interception technology is urgently needed.
Disclosure of Invention
The invention aims to provide a system and a method for collecting leakage liquid of an in-situ leaching site of an ionic rare earth ore, so as to solve the problems.
In order to achieve the purpose, the following technical scheme is adopted in the application:
an ion type rare earth ore in-situ leaching field leakage liquid collecting system comprises:
the seepage-resisting wall is used for preventing the seepage liquid of the in-situ leaching field from seeping towards the downstream;
the water replenishing well is used for forming a positive pressure area of the underground water level at the downstream of the seepage-resisting wall;
the liquid extraction well is used for extracting a solution containing in-situ leaching field leakage liquid;
the seepage-blocking wall is arranged along a seepage path at the downstream of the in-situ leaching field, the water replenishing well is arranged in the range that the downstream of the seepage-blocking wall is not more than 20m, and the liquid pumping well is arranged in the range that the upstream of the seepage-blocking wall is not more than 20m.
Preferably, the permeation-resisting wall is arranged perpendicular to the flow direction of underground water, the bottom of the permeation-resisting wall is 2-5m below the underground water level, and two ends of the permeation-resisting wall horizontally extend to the position 2-5m outside the diffusion range of the in-situ leaching field leakage liquid.
Preferably, the thickness of the permeation-resisting wall is 10-100cm, and the permeability coefficient is less than or equal to 1 multiplied by 10 -5 cm/s。
Preferably, the method for setting the seepage-resisting wall comprises the following steps:
excavating a backfill groove at a preset position, and then backfilling a seepage-blocking material in the backfill groove;
the permeation-resisting material comprises one or more of common clay, silty clay, bentonite, lime and fly ash.
Preferably, the method for setting the seepage-resisting wall comprises the following steps:
excavating a permeation-resistant groove at a preset position, and then arranging artificial permeation-resistant materials along the wall of the permeation-resistant groove;
the artificial permeation-resistant material comprises one or more of HDPE film, high-strength polyethylene sheet and felt paper.
Preferably, the method for setting the seepage-resisting wall comprises the following steps:
injecting a liquid anti-seepage material into a preset position by adopting a dense liquid injection well;
the liquid impervious material comprises one or more of cement, water glass, epoxy resin compounds, acrylate compounds, acrylamide, polyurethane compounds and vegetable gum.
Preferably, the bottom of the water replenishing well is 0.5-1m below the underground water level, the water replenishing wells are uniformly distributed along the length direction of the seepage-resisting wall, and the water surface in the water replenishing well is 0.5-1m higher than the underground water level.
Preferably, the water source of the water replenishing well comprises: one or more of surface runoff water of an external drainage ditch of the in-situ leaching field, uncontaminated stream water and tail water reaching the treatment standard.
Preferably, the bottom of the liquid pumping well is 3-5m below the underground water level, a plurality of liquid pumping wells are uniformly distributed along the length direction of the seepage-resisting wall, and the water surface in the liquid pumping well is 0.5m or more lower than that in the water replenishing well;
a plurality of the pumping wells are in communication.
The method for collecting the leakage liquid of the ionic rare earth ore in-situ leaching field is carried out by using the leakage liquid collecting system of the ionic rare earth ore in-situ leaching field and comprises the following steps:
arranging a seepage-blocking wall along a downstream seepage path of the in-situ leaching field, wherein the seepage-blocking wall is used for preventing seepage liquid of the in-situ leaching field from seeping downstream;
a water replenishing well is arranged in the range of the downstream of the seepage-resisting wall not exceeding 20m and is used for forming a positive pressure area of the underground water level in the downstream of the seepage-resisting wall;
a liquid extracting well is arranged in the range that the upstream of the seepage-resisting wall does not exceed 20m and is used for extracting a solution containing in-situ leaching field leakage liquid;
and the solution containing the in-situ leaching field leakage liquid extracted from the liquid extraction well is used for recovering rare earth or sent to a tail water station for treatment.
Compared with the prior art, the beneficial effect of this application includes:
according to the system and the method for collecting the leakage liquid of the ion type rare earth ore in-situ leaching field, the leakage-blocking wall, the water replenishing well and the liquid pumping well are arranged, so that the flow fields in micro-areas of the water replenishing well, the leakage-blocking wall and the liquid pumping well can be changed, the flow velocity of underground water near the leakage-blocking wall is greatly reduced, the interception effect of the leakage liquid is enhanced, and meanwhile, the leakage liquid is effectively controlled to flow around to the downstream of the leakage-blocking wall through the underground water to pollute the underground water environment; the seepage-resisting wall is used for controlling the upstream seepage liquid to enter the lower part of the underground water through the seepage-resisting wall, reducing the hydraulic gradient, reducing the flow velocity of the underground water and enhancing the operation effect of the seepage-resisting liquid collecting area; the function of the water replenishing well is to ensure that a positive pressure area with a higher underground water level is formed at the downstream of the barrier wall, clear water permeates into the upstream of the barrier wall through the bottom of the barrier wall, leakage liquid at the upstream of the barrier wall is prevented from entering the downstream, and the underground water flow field, the water quality and the water level at the downstream of the water replenishing well are ensured to be normal; the liquid pumping well has the functions of pumping out and utilizing or treating the seepage to reach the standard, ensuring that the water surface in the liquid pumping well is lower than that in the water replenishing well, and controlling the seepage-resistant wall upstream seepage liquid to enter downstream to pollute the downstream underground water; through the optimized setting of the water replenishing well, the seepage-resisting wall and the liquid pumping well, the normal underground water level is kept at the downstream of the water replenishing well, positive pressure is formed at the downstream of the seepage-resisting wall and at the water replenishing well, negative pressure is formed at the liquid pumping well, and a positive pressure underground water flow field is kept in an upstream leakage liquid area.
Drawings
To more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments are briefly described below, and it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope of the present application.
FIG. 1 is a schematic view of a leakage liquid collecting system of an in-situ leaching field of an ionic rare earth ore provided by an embodiment;
FIG. 2 is a sectional view of an example of a system for collecting a leachate from an in-situ leaching site of an ionic rare earth ore.
Reference numerals:
1-a seepage-resistant wall; 2-make-up well; 3, pumping a liquid well; 4-water surface position of the water replenishing well; 5-the position of the water surface of the liquid pumping well; 6-normal ground water level; 7-underground water level of the liquid extraction area; 8-groundwater level of the water replenishing area.
Detailed Description
The term as used herein:
"prepared from … …" is synonymous with "comprising". The terms "comprises," "comprising," "includes," "including," "has," "having," "contains," "containing," or any other variation thereof, as used herein, are intended to cover a non-exclusive inclusion. For example, a composition, process, method, article, or apparatus that comprises a list of elements is not necessarily limited to only those elements but may include other elements not expressly listed or inherent to such composition, process, method, article, or apparatus.
The conjunction "consisting of … …" excludes any unspecified elements, steps, or components. If used in a claim, this phrase shall render the claim closed except for the materials described except for those materials normally associated therewith. When the phrase "consisting of … …" appears in a clause of the subject of the claims rather than immediately after the subject matter, it defines only the elements described in that clause; no other elements are excluded from the claims as a whole.
When an amount, concentration, or other value or parameter is expressed as a range, preferred range, or as a range of upper preferable values and lower preferable values, this is to be understood as specifically disclosing all ranges formed from any pair of any upper range limit or preferred value and any lower range limit or preferred value, regardless of whether ranges are separately disclosed. For example, when a range of "1 to 5" is disclosed, the described range should be interpreted to include the ranges "1 to 4," "1 to 3," "1 to 2 and 4 to 5," "1 to 3 and 5," and the like. When a range of values is described herein, unless otherwise stated, the range is intended to include the endpoints thereof and all integers and fractions within the range.
In these examples, the parts and percentages are by mass unless otherwise indicated.
"parts by mass" means the basic unit of measure indicating the mass ratio of the plurality of components, and 1 part may represent any unit mass, for example, 1g, 2.689g, and the like. If the parts by mass of the component A are a parts and the parts by mass of the component B are B parts, the mass ratio of the component A to the component B is expressed as a: b. alternatively, the mass of the A component is aK and the mass of the B component is bK (K is an arbitrary number, and represents a multiple factor). It is unmistakable that, unlike the parts by mass, the sum of the parts by mass of all the components is not limited to 100 parts.
"and/or" is used to indicate that one or both of the illustrated conditions may occur, e.g., a and/or B includes (a and B) and (a or B).
An ion type rare earth ore in-situ leaching field leakage liquid collecting system comprises:
the seepage-resisting wall is used for preventing the seepage liquid of the in-situ leaching field from seeping towards the downstream;
the water replenishing well is used for forming a positive pressure area of the underground water level at the downstream of the seepage-resisting wall;
the liquid extraction well is used for extracting a solution containing in-situ leaching field leakage liquid;
the seepage-blocking wall is arranged along a seepage path at the downstream of the in-situ leaching field, the water replenishing well is arranged in the range that the downstream of the seepage-blocking wall is not more than 20m, and the liquid pumping well is arranged in the range that the upstream of the seepage-blocking wall is not more than 20m.
The phrase "within a range of not more than 20 m" as used herein generally means that the distance of a straight line perpendicular to the direction of the barrier wall is not more than 20m with respect to the barrier wall.
In an optional embodiment, the permeation-resisting wall is arranged perpendicular to the flow direction of underground water, the bottom of the permeation-resisting wall is 2-5m below the underground water level, and two ends of the permeation-resisting wall horizontally extend to the position 2-5m outside the diffusion range of the in-situ leaching field seepage liquid.
The ground water level refers to the normal ground water level at which the permeation preventing wall is located. The fact that two ends of the barrier wall horizontally extend to the outside of the diffusion range of the in-situ leaching field leakage liquid by 2-5m means that the length of the barrier wall is 2-5m greater than the diffusion range of the in-situ leaching field leakage liquid, and therefore the permeation prevention effect is guaranteed.
The bottom of the seepage-resisting wall can be any value between 2m, 3m, 4m, 5m or 2-5m below the underground water level; the two ends horizontally extend to any value between 2m, 3m, 4m, 5m or 2-5m outside the diffusion range of the in-situ leaching field leakage liquid.
In an optional embodiment, the thickness of the permeation-resisting wall is 10-100cm, and the permeability coefficient is less than or equal to 1 multiplied by 10 -5 cm/s。
Optionally, the thickness of the barrier wall can be 10cm, 20cm, 30cm, 40cm, 50cm, 60cm, 70cm, 80cm, 90cm, 100cm or any value between 10 and 100 cm.
In an optional embodiment, the method for setting the blocking wall comprises the following steps:
excavating a backfill groove at a preset position, and then backfilling a seepage-blocking material in the backfill groove;
the permeation-resisting material comprises one or more of common clay, silty clay, bentonite, lime and fly ash.
In an optional embodiment, the method for setting the blocking wall comprises the following steps:
excavating a permeation-resistant groove at a preset position, and then arranging artificial permeation-resistant materials along the wall of the permeation-resistant groove;
the artificial permeation-resistant material comprises one or more of HDPE film, high-strength polyethylene sheet and felt paper.
In an optional embodiment, the method for setting the blocking wall comprises the following steps:
injecting a liquid anti-seepage material into a preset position by adopting a dense liquid injection well;
the liquid impervious material comprises one or more of cement, water glass, epoxy resin compounds, acrylate compounds, acrylamide, polyurethane compounds and vegetable gum.
In an optional embodiment, the bottom of the water replenishing well is 0.5-1m below the ground water level, a plurality of water replenishing wells are uniformly distributed along the length direction of the seepage-resisting wall, and the water surface in the water replenishing well is 0.5-1m higher than the ground water level.
Optionally, the bottom of the water replenishing well is 0.5m, 0.6m, 0.7m, 0.8m, 0.9m, 1m or any value between 0.5 and 1m below the ground water level, and the water level in the water replenishing well is higher than the ground water level by 0.5m, 0.6m, 0.7m, 0.8m, 0.9m, 1m or any value between 0.5 and 1m.
In an alternative embodiment, the water source of the water replenishing well comprises: one or more of surface run-off water of an external drainage ditch of the in-situ leaching field, uncontaminated stream water and tail water reaching the treatment standard.
In an optional embodiment, the bottom of the pumping well is 3-5m below the ground water level, a plurality of pumping wells are uniformly distributed along the length direction of the seepage-resisting wall, and the water level in the pumping well is 0.5m and above lower than that in the replenishing well;
a plurality of the pumping wells are in communication.
Optionally, the bottom of the pumping well is at any value between 3m, 4m, 5m or 3-5m below the groundwater level, and the water level in the pumping well is lower than the water level in the replenishing well by any value between 0.5m, 0.6m, 0.7m, 0.8m, 0.9m, 1m or 0.5m and above.
The method for collecting the leakage liquid of the ionic rare earth ore in-situ leaching field is carried out by using the leakage liquid collecting system of the ionic rare earth ore in-situ leaching field and comprises the following steps:
arranging a seepage-blocking wall along a downstream seepage path of the in-situ leaching field, wherein the seepage-blocking wall is used for preventing seepage liquid of the in-situ leaching field from seeping downstream;
a water replenishing well is arranged in the range of the downstream of the seepage-resisting wall not exceeding 20m and is used for forming a positive pressure area of the underground water level in the downstream of the seepage-resisting wall;
a liquid extracting well is arranged in the range that the upstream of the seepage-resisting wall does not exceed 20m and is used for extracting a solution containing in-situ leaching field leakage liquid;
and the solution containing the in-situ leaching field leakage liquid extracted from the liquid extraction well is used for recovering rare earth or sent to a tail water station for treatment.
When the rare earth content in the in-situ leaching field-containing leakage liquid extracted from the liquid extraction well is higher, pumping the leakage liquid to a mother liquor workshop to recover the rare earth; and (4) pumping the rare earth with low content and characteristic pollutants exceeding the emission standard to a tail water station for treatment and utilization or emission after reaching the standard.
Embodiments of the present application will be described in detail below with reference to specific examples, but those skilled in the art will appreciate that the following examples are only illustrative of the present application and should not be construed as limiting the scope of the present application. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
Example 1
The embodiment provides a system and a method for collecting ion type rare earth ore in-situ leaching field leakage liquid, which specifically comprise the following steps:
ganzhou certain ionic rare earth ore, the thickness of the weathering crust of the ore deposit is about 15m, the bedrock at the bottom of the ore deposit is buried below the erosion datum plane, the groundwater burial depth of a valley gentle zone at the downstream of the ore deposit is 0.5m, the water-bearing layer thickness is more than 10m, the width of the valley gentle zone is more than 50m, and the rare earth is recovered by adopting an in-situ ore leaching process.
As shown in fig. 1 and 2, the arrangement of the leakage liquid collecting system of the ion type rare earth ore in-situ leaching field comprises the following steps:
(a) Arranging a seepage-resisting wall 1 in a gentle valley zone 50m downstream of the in-situ leaching field, wherein the seepage-resisting wall 1 is vertical to the flow direction of underground water, and two ends of the seepage-resisting wall extend to 3m outside the diffusion range of leakage liquid; excavating a trapezoidal groove with the top width of 1.5m and the depth of 3m; laying HDPE films along the inner wall of the groove, wherein the lap joint width of the lap joint is not less than 10cm, and welding the two sides; backfilling the excavated earthwork to the elevation of the original ground.
(b) 1 row of water replenishing wells 2 are arranged at 2m positions of the downstream of the seepage-stopping wall 1, the water replenishing wells 2 are arranged in parallel along the seepage-stopping wall, the well diameter is 1m, the well depth is 1m, and clear water in a water collecting tank for cleaning and shunting in-situ leaching field is led to the water replenishing wells 2 through pipelines.
(c) Arranging 7 liquid pumping wells 3 at 3m upstream of the seepage-resisting wall 1, wherein the well depth is 5m, and the well diameter is 1m; communicating holes are arranged at the positions of 4m depth of each well to communicate the liquid pumping wells 3; an acid-resistant pump is arranged in the middle liquid pumping well 3, and pumped water is conveyed to a mother liquid system or a tail water treatment station of a mother liquid workshop by a PE pipe.
Wherein, the water surface position 4 of the water replenishing well, the water surface position 5 of the liquid pumping well, the normal underground water level 6, the underground water level 7 of the liquid pumping area and the underground water level 8 of the water replenishing area are shown in figure 2.
Then in-situ leaching is carried out, 3 percent (average mass concentration) of ammonium sulfate solution is injected into the injection system, and the injection strength is 2000m 3 D, the duration of liquid injection is about 150 days, the mother liquid collection rate is 80 percent, and the rare earth leachate collected by the liquid collection system is about 240000m 3 . The leaching period adopts clear water for leaching, the leaching time is about 150 days, and the leaching strength is 2000m 3 And d. If no leakage liquid collection measure is adopted, the loss amount of the leaching mother liquor is 400m 3 Total loss mother liquor 60000m 3 . Loss of tail water from leaching 400m 3 A total of about 60000m 3 Tail water enters downstream.
By adopting the method of the embodiment, when the liquid pumping well is thinThe soil concentration (REO) reaches the rare earth utilization concentration of the mother liquor workshop, an acid-resistant pump is started to pump the leakage liquid, the leakage liquid is pumped out in the ore leaching period and is conveyed to the mother liquor treatment workshop to recover rare earth and ammonium sulfate, and about 51000m is pumped out 3 The average rare earth concentration of the leakage solution is 400mg/L, and about 20t of rare earth is recycled. When the concentration of sulfate is more than 800mg/L or the concentration of ammonium is more than 15mg/L, the pumped leakage liquid is conveyed to a tail water treatment station of a mother liquor workshop for treatment, and about 51000m is pumped out in the leaching period 3 And pumping the seepage liquid to tail water for treatment and then leaching. The leachate recovery rate is about 85 percent.
Example 2
The embodiment provides a system and a method for collecting ion type rare earth ore in-situ leaching field leakage liquid, which specifically comprise the following steps:
ganzhou certain ionic rare earth ore, the thickness of the weathering crust of the ore deposit is about 15m, the bedrock at the bottom of the ore deposit is buried below the erosion datum plane, the groundwater burial depth of a gentle zone at the downstream of the ore deposit is 0.5m, the thickness of a water-containing layer is more than 12m, the width of the gentle zone is more than 50m, and the rare earth is recovered by adopting an in-situ ore leaching process.
The arrangement of the ionic rare earth ore in-situ leaching field leakage liquid collecting system comprises the following steps:
(a) Arranging a seepage-resisting wall 1 in a gentle zone 40m downstream of an in-situ leaching field, wherein the seepage-resisting wall 1 is vertical to the flow direction of underground water, and two ends of the seepage-resisting wall extend to 3m outside the diffusion range of seepage liquid; constructing 2 rows of grouting holes at the position 1 of the seepage-resistant wall, wherein the row spacing is 0.3m, the hole spacing is 0.5m, the aperture is 80mm, the hole depth is 3m, quickly forming holes by using a Luoyang shovel, injecting acrylate, water-soluble polyurethane, oil-soluble polyurethane and epoxy resin grouting materials, and performing a water pressure test after grouting construction is finished for 1d to ensure that the stratum permeability after grouting is less than 1Lu.
(b) Arranging 1 row of water replenishing wells 2 at the position 10m downstream of the seepage-stopping wall 1, wherein the well spacing is 3m, and the well diameter is 1m; the well depth is 2m, the water replenishing well 2 is arranged in parallel along the seepage-resisting wall, and clean water in a water collecting tank at the downstream of the in-situ leaching field is led to the water replenishing well 2 through a pipeline.
(c) Arranging 7 liquid pumping wells 3 at 10m upstream of the seepage-resisting wall 1, wherein the well depth is 5m, and the well diameter is 1m; communicating holes are arranged at the positions 3m deep of each well to communicate the liquid pumping wells 3; an acid-proof pump is arranged in one of the liquid pumping wells 3, and the pumped percolate is conveyed to a mother liquid workshop by an acid-proof pipe.
Then in-situ leaching is carried out, 3 percent (average mass concentration) of ammonium sulfate solution is injected into the injection system, and the injection strength is 2000m 3 D, the duration of liquid injection is about 150 days, the mother liquid collection rate is 75 percent, and the rare earth leachate collected by a liquid collection system is about 225000m 3 . The leaching period adopts clear water for leaching, the leaching time is about 150 days, and the leaching strength is 2000m 3 And d. If no leakage liquid collection measure is adopted, the loss amount of the leaching mother liquor is 500m 3 (d) total loss of mother liquor 75000m 3 . Leaching tail water loss of 500m 3 D, total of about 75000m 3 Tail water enters downstream groundwater.
By adopting the method of the embodiment, when the rare earth concentration (REO) in the underground water of the liquid extraction well reaches the rare earth utilization concentration of the mother liquor workshop, the acid-resistant pump is started to pump out the leakage liquid, and about 65000m is pumped out totally 3 The average rare earth concentration of the leakage liquid is 400mg/L, and about 26t of rare earth is recovered. When the sulfate concentration is more than 800mg/L or the ammonia nitrogen concentration is more than 15mg/L, about 65000m is extracted in the leaching period 3 And conveying the leakage liquid to a tail water treatment station of a mother liquor workshop for treatment for leaching. The leachate recovery rate is about 86.7 percent.
Example 3
The embodiment provides an ion type rare earth ore in-situ leaching field leakage liquid collecting system, which specifically comprises the following steps:
ganzhou certain ionic rare earth ore, the thickness of the weathering crust of the ore deposit is about 15m, the bedrock at the bottom of the ore deposit is buried below the erosion datum plane, the groundwater burial depth of a gentle valley zone at the downstream of the ore deposit is 0.5m, the water-containing layer thickness is more than 10m, the width of the gentle zone is more than 50m, and the rare earth is recovered by adopting an in-situ ore leaching process.
The arrangement of the ionic rare earth ore in-situ leaching field leakage liquid collecting system comprises the following steps:
(a) Arranging a seepage-resisting wall 1 in a gentle valley zone 50m downstream of the in-situ leaching field, wherein the seepage-resisting wall 1 is vertical to the flow direction of underground water, and two ends of the seepage-resisting wall extend to 3m outside the diffusion range of leakage liquid; excavating a trapezoidal groove with the top width of 1.5m and the depth of 3m; laying HDPE films along the inner wall of the groove, wherein the lap joint width of the lap joint is not less than 10cm, and welding the two sides; backfilling the excavated earthwork to the original ground elevation.
(b) Arranging 1 row of water replenishing wells 2 at 15m of the downstream of the seepage-stopping wall 1, wherein the length of each water replenishing well 2 is equal to that of the seepage-stopping wall 1, the well diameter is 0.8m, the well depth is 1m, and clear water in a water collecting tank for cleaning and shunting in an in-situ leaching field is introduced to the water replenishing wells 2 through pipelines.
(c) Arranging 7 liquid pumping wells 3 at 15m upstream of the seepage-resisting wall 1, wherein the well depth is 5m, and the well diameter is 1m; communicating holes are arranged at the positions of 4m depth of each well to communicate the liquid pumping wells 3; an acid-resistant pump is arranged in the middle liquid pumping well 3, and pumped water is conveyed to a mother liquid system or a tail water treatment station of a mother liquid workshop by a PE pipe.
Then in-situ leaching is carried out, 3 percent (average mass concentration) of ammonium sulfate solution is injected into the injection system, and the injection strength is 2000m 3 D, the liquid injection duration is about 150 days, the mother liquid collection rate is 78 percent, and the rare earth leachate collected by the liquid collection system is about 234000m 3 . The leaching period adopts clear water for leaching, the leaching time is about 150 days, and the leaching strength is 2000m 3 And d. If no leakage liquid collection measure is taken, the loss amount of the leaching mother liquor is 440m 3 D, total loss mother liquor of about 66000m 3 . Loss of 440m of leaching tail water 3 D, total of about 66000m 3 Tail water enters downstream.
By adopting the method of the embodiment, when the rare earth concentration (REO) in the liquid pumping well reaches the rare earth utilization concentration of the mother liquor workshop, the acid-proof pump is started to pump the leakage liquid, the leakage liquid is pumped out in the ore leaching period and is conveyed to the mother liquor treatment workshop to recover the rare earth and ammonium sulfate, about 59000m is pumped out totally 3 The average rare earth concentration of the leakage liquid is 400mg/L, and about 23.6t of rare earth is recycled. When the concentration of sulfate is more than 800mg/L or the concentration of ammonium is more than 15mg/L, the pumped leakage liquid is conveyed to a tail water treatment station of a mother liquor workshop for treatment, and about 59000m is pumped out in the leaching period 3 And pumping the seepage liquid to tail water for treatment and then leaching. The leachate recovery rate is about 89%.
Comparative example 1
In Ganzhou certain ionic rare earth ore, the thickness of the weathering crust of the ore deposit is about 15m, the bedrock at the bottom of the ore deposit is lower than the erosion datum plane, the groundwater burial depth of a gentle zone at the downstream of the ore deposit is 0.5m, the thickness of the water-bearing layer is more than 15m, the width of the gentle zone is more than 50m, and the rare earth is recovered by adopting an in-situ ore leaching process.
The in-situ leaching leakage liquid collecting system comprises the following steps:
7 leakage liquid recovery wells are constructed at valley positions 40m downstream of the mining area, the buried depth of a weathered layer of a mother liquid interception construction position is 15m, the well depth of each leakage liquid recovery well is 15m, the well diameter is 1m, the well spacing is 1m, acid-resistant pumps are arranged in the 7 recovery wells, and the leakage liquid pumped out is conveyed to a mother liquid workshop through acid-resistant pipes.
Then, in-situ leaching was performed, and the liquid injection leaching and leaching strengths and times were the same as those of example 1.
By adopting the method of the embodiment, when the rare earth concentration (REO) in the leakage water of the recovery well reaches the rare earth utilization concentration of the mother liquor workshop, the acid-proof pump is started to pump out the leakage liquid, and about 20000m is pumped out in the leaching period 3 And (4) conveying the leakage liquid with the average concentration of the rare earth of 400mg/L to a mother liquor treatment workshop to recover the rare earth, and recovering 8t of the rare earth. When the concentration of sulfate is more than 800mg/L and the concentration of ammonia nitrogen is more than 15mg/L, about 20000m is extracted in the leaching period 3 And conveying the leakage liquid to a tail water treatment station of a mother liquor workshop for treatment for leaching.
It can be seen that the percolate collection rate is much lower than that of the method described in example 1, the percolate recovery rate is about 33.3%, the collection effect is poor, a large amount of percolate with recovery value enters downstream groundwater to be lost, and a large amount of percolate containing mineral leaching agent enters downstream groundwater to pollute the water environment.
Comparative example 2
In Ganzhou certain ionic rare earth ore, the thickness of the weathering crust of the ore deposit is about 15m, the bedrock at the bottom of the ore deposit is lower than the erosion datum plane, the groundwater burial depth of a gentle zone at the downstream of the ore deposit is 0.5m, the thickness of the water-bearing layer is more than 15m, the width of the gentle zone is more than 50m, and the rare earth is recovered by adopting an in-situ ore leaching process.
The in-situ leaching leakage liquid collecting system comprises the following steps:
(a) Arranging a seepage-resisting wall 1 in a gentle valley zone 50m downstream of the in-situ leaching field, wherein the seepage-resisting wall 1 is vertical to the flow direction of underground water, and two ends of the seepage-resisting wall extend to 3m outside the diffusion range of leakage liquid; excavating a trapezoidal groove with the top width of 1.5m and the depth of 3m; laying HDPE films along the inner wall of the groove, wherein the lap joint width of the lap joint is not less than 10cm, and welding the two sides; backfilling the excavated earthwork to the original ground elevation.
(b) Arranging 7 liquid pumping wells 3 at 3m upstream of the seepage-resisting wall 1, wherein the well depth is 5m, and the well diameter is 1m; communicating holes are arranged at the positions of 4m depth of each well to communicate the liquid pumping wells 3; an acid-resistant pump is arranged in the middle liquid pumping well 3, and pumped water is conveyed to a mother liquid system or a tail water treatment station of a mother liquid workshop by a PE pipe.
Then, in-situ leaching was performed, and the liquid injection leaching and leaching strengths and times were the same as those of example 1.
By adopting the method of the embodiment, when the rare earth concentration (REO) in the leaked water of the recovery well reaches the rare earth utilization concentration of a mother liquor workshop, the acid-resistant pump is started to pump out the leaked water, and about 25000m is pumped out in the ore leaching period 3 And (4) conveying the leakage liquid with the average rare earth concentration of 400mg/L to a mother liquid treatment workshop to recover rare earth, and recovering 10t of rare earth. When the concentration of sulfate is more than 800mg/L and the concentration of ammonia nitrogen is more than 15mg/L, about 25000m is extracted in the leaching period 3 And conveying the leakage liquid to a tail water treatment station of a mother liquor workshop for treatment for leaching.
It can be seen that the collection rate of the leachate is much lower than that of the method described in example 1, the recovery rate of the leachate is about 42%, the collection effect is poor, a large amount of leachate with recovery value enters downstream groundwater to be lost, and a large amount of leachate containing mineral leaching agent enters downstream groundwater to pollute the water environment.
Comparative example 3
In Ganzhou certain ionic rare earth ore, the thickness of the weathering crust of the ore deposit is about 15m, the bedrock at the bottom of the ore deposit is lower than the erosion datum plane, the groundwater burial depth of a gentle zone at the downstream of the ore deposit is 0.5m, the thickness of the water-bearing layer is more than 15m, the width of the gentle zone is more than 50m, and the rare earth is recovered by adopting an in-situ ore leaching process.
The in-situ leaching leakage liquid collecting system comprises the following steps:
(a) 7 liquid pumping wells 3 are arranged in a gentle valley zone 50m downstream of the in-situ leaching field, the well depth is 5m, and the well diameter is 1m; communicating holes are arranged at the positions of 4m depth of each well to communicate the liquid pumping wells 3; an acid-resistant pump is arranged in the middle liquid pumping well 3, and pumped water is conveyed to a mother liquid system or a tail water treatment station of a mother liquid workshop by a PE pipe.
(b) Arranging 1 row of water replenishing wells 2 at the position 10m downstream of the liquid pumping well 3, wherein the length of the water replenishing wells 2 is the same as that of the liquid pumping well, the well diameter is 1m, the well depth is 1m, and clean water in a water collecting tank for cleaning and shunting of an in-situ leaching field is led to the water replenishing wells 2 through pipelines.
Then, in-situ leaching was performed, and the liquid injection leaching and leaching strengths and times were the same as those of example 1.
By adopting the method of the embodiment, when the rare earth concentration (REO) in the leaked water of the recovery well reaches the rare earth utilization concentration of a mother liquor workshop, the acid-resistant pump is started to pump out the leaked water, and about 31000m is pumped out in the ore leaching period 3 And (4) conveying the leakage liquid with the average rare earth concentration of 300mg/L to a mother liquid treatment workshop to recover rare earth, and recovering 12t of rare earth. When the concentration of the sulfate is more than 800mg/L and the concentration of the ammonia nitrogen is more than 15mg/L, about 31000m is drawn out in the leaching period 3 And conveying the leakage liquid to a tail water treatment station of a mother liquor workshop for treatment for leaching.
It can be seen that the collection rate of the leakage liquid is far lower than that of the method in example 1, the recovery rate of the leakage liquid is about 51.6%, the collection effect is poor, a large amount of leakage liquid with recovery value still enters downstream groundwater to be lost, and a large amount of leachate containing mineral leaching agent enters downstream groundwater to pollute the water environment.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Moreover, those skilled in the art will appreciate that while some embodiments herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the application and form different embodiments. For example, in the claims above, any of the claimed embodiments may be used in any combination. The information disclosed in this background section is only for enhancement of understanding of the general background of the application and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art that is already known to a person skilled in the art.
Claims (6)
1. The utility model provides an ion type rare earth ore in situ leaching field seepage collecting system which characterized in that includes:
the seepage-resisting wall is used for preventing the seepage liquid of the in-situ leaching field from seeping towards the downstream;
the water replenishing well is used for forming a positive pressure area of the underground water level at the downstream of the seepage-resisting wall;
the liquid extraction well is used for extracting a solution containing in-situ leaching field leakage liquid;
the seepage-resisting wall is arranged along a downstream seepage path of the in-situ leaching field, the water replenishing well is arranged in the range that the downstream of the seepage-resisting wall is not more than 20m, and the liquid pumping well is arranged in the range that the upstream of the seepage-resisting wall is not more than 20 m;
the seepage-resisting wall is arranged perpendicular to the flow direction of underground water, the bottom of the seepage-resisting wall is 2-5m below the underground water level, and two ends of the seepage-resisting wall horizontally extend to be 2-5m outside the diffusion range of the seepage liquid of the in-situ leaching field; the thickness of the permeation-resisting wall is 10-100cm, and the permeability coefficient is less than or equal to 1 multiplied by 10 - 5 cm/s；
The bottom of the water replenishing well is 0.5-1m below the underground water level, a plurality of water replenishing wells are uniformly distributed along the length direction of the seepage-resisting wall, and the water surface in the water replenishing well is 0.5-1m higher than the underground water level;
the bottom of the pumping well is 3-5m below the underground water level, a plurality of pumping wells are uniformly distributed along the length direction of the seepage-resisting wall, and the water surface in the pumping well is 0.5m or more lower than that in the water replenishing well; a plurality of the pumping wells are in communication.
2. The ionic rare earth ore in-situ leaching field leakage liquid collecting system according to claim 1, wherein the setting method of the permeation-resisting wall comprises the following steps:
excavating a backfill groove at a preset position, and then backfilling a permeation-resisting material in the backfill groove;
the permeation-resisting material comprises one or more of common clay, silty clay, bentonite, lime and fly ash.
3. The system for collecting the leakage liquid of the in-situ ionic rare earth ore leaching field according to claim 1, wherein the method for arranging the permeation-resisting wall comprises the following steps:
excavating a permeation-resistant groove at a preset position, and then arranging artificial permeation-resistant materials along the wall of the permeation-resistant groove;
the artificial permeation-resistant material comprises one or more of HDPE film, high-strength polyethylene sheet and felt paper.
4. The system for collecting the leakage liquid of the in-situ ionic rare earth ore leaching field according to claim 1, wherein the method for arranging the permeation-resisting wall comprises the following steps:
injecting a liquid anti-seepage material into a preset position by adopting a dense liquid injection well;
the liquid impervious material comprises one or more of cement, water glass, epoxy resin compounds, acrylate compounds, acrylamide, polyurethane compounds and vegetable gum.
5. The system for collecting the leakage liquid of the ionic rare earth ore in-situ leaching field according to claim 1, wherein the water source of the water replenishing well comprises: one or more of surface run-off water of an external drainage ditch of the in-situ leaching field, uncontaminated stream water and tail water reaching the treatment standard.
6. A method for collecting the leakage liquid of an ionic rare earth ore in-situ leaching field, which is carried out by using the leakage liquid collecting system of the ionic rare earth ore in-situ leaching field according to any one of claims 1 to 5, and comprises the following steps:
arranging a seepage-blocking wall along a downstream seepage path of the in-situ ore leaching field for preventing seepage liquid of the in-situ ore leaching field from seeping downstream;
a water replenishing well is arranged in the range of the downstream of the seepage-resisting wall not exceeding 20m and is used for forming a positive pressure area of the underground water level in the downstream of the seepage-resisting wall;
a liquid extracting well is arranged in the range that the upstream of the seepage-resisting wall does not exceed 20m and is used for extracting a solution containing in-situ leaching field leakage liquid;
and the solution containing the in-situ leaching field leakage liquid extracted from the liquid extraction well is used for recovering rare earth or sent to a tail water station for treatment.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202124860U (en) * | 2011-05-27 | 2012-01-25 | 中国水电顾问集团中南勘测设计研究院 | Annular impervious curtain for high pressure water channel |
| CN106435226A (en) * | 2016-09-28 | 2017-02-22 | 赣州稀土矿业有限公司 | Underwater pollution preventing method in ion rare earth in-situ ore leaching process |
| CN108374097A (en) * | 2017-11-16 | 2018-08-07 | 江西离子型稀土工程技术研究有限公司 | Southern china weathered superficial leaching rare-earth ore leachate stopped flow technique |
| CN109182750A (en) * | 2018-11-16 | 2019-01-11 | 武汉工程大学 | A kind of weathered superficial leaching rare-earth ore Situ Leaching leakage closure method |
| CN110451685A (en) * | 2019-08-02 | 2019-11-15 | 山东省地质矿产勘查开发局八〇一水文地质工程地质大队 | Combined restoration system and method for removing organic pollution in underground water in mine |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1208080A (en) * | 1997-08-07 | 1999-02-17 | 赣州有色冶金研究所 | In-situ ionic rare earth deposit impregnating technology |
| CN101915073B (en) * | 2010-08-03 | 2012-08-15 | 江西稀有金属钨业控股集团有限公司 | In situ leaching injection process |
| CN108265833A (en) * | 2018-02-02 | 2018-07-10 | 广西大学 | Moisturizing reverse osmosis systems after a kind of concrete structure elder generation water storage |
| CN210684649U (en) * | 2019-05-21 | 2020-06-05 | 中节能大地环境修复有限公司 | Ecological recovery system for ionic rare earth in-situ leaching abandoned mine |
| CN113444882B (en) * | 2021-07-19 | 2022-04-26 | 矿冶科技集团有限公司 | Ion adsorption type rare earth ore in-situ leaching field leakage mother liquor recovery system and treatment method |
| CN115094820B (en) * | 2022-07-09 | 2023-12-05 | 中国城市建设研究院有限公司 | Groundwater pollution risk control system for valley type landfill |
-
2022
- 2022-09-02 CN CN202211068593.6A patent/CN115125404B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202124860U (en) * | 2011-05-27 | 2012-01-25 | 中国水电顾问集团中南勘测设计研究院 | Annular impervious curtain for high pressure water channel |
| CN106435226A (en) * | 2016-09-28 | 2017-02-22 | 赣州稀土矿业有限公司 | Underwater pollution preventing method in ion rare earth in-situ ore leaching process |
| CN108374097A (en) * | 2017-11-16 | 2018-08-07 | 江西离子型稀土工程技术研究有限公司 | Southern china weathered superficial leaching rare-earth ore leachate stopped flow technique |
| CN109182750A (en) * | 2018-11-16 | 2019-01-11 | 武汉工程大学 | A kind of weathered superficial leaching rare-earth ore Situ Leaching leakage closure method |
| CN110451685A (en) * | 2019-08-02 | 2019-11-15 | 山东省地质矿产勘查开发局八〇一水文地质工程地质大队 | Combined restoration system and method for removing organic pollution in underground water in mine |
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