CN108034815A - A kind of tailing original position extract technology and tailing original position leaching system - Google Patents
A kind of tailing original position extract technology and tailing original position leaching system Download PDFInfo
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- CN108034815A CN108034815A CN201711251389.7A CN201711251389A CN108034815A CN 108034815 A CN108034815 A CN 108034815A CN 201711251389 A CN201711251389 A CN 201711251389A CN 108034815 A CN108034815 A CN 108034815A
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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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- 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
- C22B3/18—Extraction of metal compounds from ores or concentrates by wet processes with the aid of microorganisms or enzymes, e.g. bacteria or algae
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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
- Y02P10/20—Recycling
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Abstract
The present invention relates to a kind of tailing original position extract technology and tailing original position leaching system, the technique to include：Injection hole and extraction hole are drilled with the Active workings of pending tailing；Vertical divider system is laid in the Active workings area peripheral edge of pending tailing；Monitoring system is laid in the periphery of vertical divider system；Fracture grouting pipe is plugged in required injection hole, jelly suction pipe is inserted into required extraction hole；Using fracture grouting mode, leaching agent is injected into injection hole；Leaching agent is spread, and is reacted with the useful constituent in tailing heap body；The leachate formed is reacted to send to ground leaching liquid treating system progress subsequent treatment by jelly suction pipe extraction.The present invention effectively can recycle useful constituent under the conditions of lower cost, it combines vertical divider, monitoring system can avoid secondary pollution, be widely used in the leaching in situ of heavy metal tailing, and the loss of problems and resource caused by avoiding tailings impoundment wastes.
Description
Technical field
The present invention relates to a kind of disposal of tailings glass and comprehensive utilization technique, is leached more particularly to a kind of tailing is in situ
Technique and tailing original position leaching system.
Background technology
Traditional exploitation of mineral resources requires extraction high-grade, easy ore dressing, so as to cause that resource utilization is low, the energy disappears
Consumption is big, produces substantial amounts of abandoned mine and tailing, since its grade is relatively low, can only be stacked at Tailings Dam for a long time.According to statistics, to current
Untill, the tailing of all kinds of mine stockpilings in China is being increased up to 8,000,000,000 t with the speed of year discharge t more than 300,000,000, wherein, iron ore
2,600,000,000 t of tailing, 2,100,000,000 t of nonferrous metals ore tailing, gold mine tailings also reach 300,000,000 t.As industrialization development is to mineral products demand
Continue to increase, the accumulating amount of tailing is increasing, and tailing is in stacking process, with the change of surrounding enviroment, contains in tailing
Some heavy metal elements, harmful element can enter in air, water body and soil and pollute, and such as handle not in time, certainly will
Problems are brought to environment, geology, safety, economic dispatch.
Mineral resources are non-renewable resources, are utilized by exploitation for many years, and high-grade easily selects smelting mineral resources increasingly
Reduce, and a large amount of valuable elements are not utilized effectively in tailing, the existing substantial amounts of resource of tailings letter in China is to be developed, therefore
Mining tailing is using the exploitation of technology into the task of top priority.
Type according to ore is different from grade, and the industrialized production that primary ore leaches mainly has 3 kinds：Dump leaching method,
Pond leaching process or drill traverse method, raw ore underground extraction.But different from primary ore, tailing is after flotation, and mineral composition and structure are all
There occurs certain change, and still there are difference with raw ore leaching in terms of Leaching Mechanism of Refractory and leaching kinetics.Due to tailing product
The universal relatively low and storage in position is larger, higher using leaching process costs, is economically restricted；Using relatively inexpensive
Dump leaching process and extracting technology, and since tailing granularity is superfine so that leach the permeability for building heap and gas permeability is very poor, no
It can meet the requirement of extract technology, cause leaching rate relatively low, the current still vacancy of leaching-out technique in situ of tailing, develops tail
Ore deposit original position leaching-out technique has the promotion prospect and engineering value of reality.
The content of the invention
In view of the deficiencies of the prior art, the present invention provides in situ leach of a kind of tailing original position extract technology and tailing to be
System, effectively can recycle useful constituent under the conditions of lower cost, it combines barrier, monitoring system can be avoided in leaching process
Caused by secondary pollution, can be widely applied to the leaching in situ of heavy metal tailing, avoid problems caused by tailings impoundment
And the loss of resource wastes.
In order to achieve the above object, the technical solution adopted in the present invention is to provide a kind of tailing original position leaching system,
Including following steps：
Step 1：Injection hole and extraction hole are drilled with the Active workings of pending tailing；
Step 2：Vertical divider system is laid in the Active workings area peripheral edge of pending tailing；
Step 3：Monitoring system is laid in the periphery of vertical divider system；
Step 4：Fracture grouting pipe is plugged in required injection hole, jelly suction pipe is inserted into required extraction hole；
Step 5：Using fracture grouting mode, leaching agent is injected into injection hole；
Step 6：Leaching agent is spread, and is reacted with the useful constituent in tailing heap body；；
Step 7：After reaction, the leachate for reacting formation is extracted out and sent to ground leaching liquid treating system progress
Continuous processing, and leachate is detected, according to testing number it is judged that whether extract technology is handled completely, such as not completely, continue
Step 5 and step 6, extend reaction time or adjustment injection parameter；The injection and the leachate that stop leaching agent if completely
Extract, complete leaching process.
Preferably technical solution is：The injection hole is evenly distributed with extraction hole.
Preferably technical solution is：The injection hole and the distribution form of extraction hole are two kinds of grid type or determinant, institute
The center that extraction hole in grid type well type is located at production unit is stated, injection hole is by spacing around extraction pore size distribution, determinant well type
In the respective arrangement in a row of extraction hole and injection hole.
Preferably technical solution is：The injection hole and extraction hole aperture be φ 50-70mm, the fracture grouting pipe with
Jelly suction pipe uses plastic tube of the internal diameter for φ 40-60, bores one group every 33-50cm on the tube wall of the injection hole and penetrates slurry hole.
Preferably technical solution is：Mud is poured into fill fracture grouting pipe between the fracture grouting pipe and injection hole
Gap between the wall of a borehole.
Preferably technical solution is：The leaching agent is applicable in acid-base method leaching agent, Microorganism Leaching agent or its joint and leaches
Agent.
Preferably technical solution is：It is initial around extraction hole when extracting leachate in the jelly suction pipe of the extraction hole out
Liquid level line declines, and forms a precipitation funnel centered on extraction hole, forms hydraulic gradient among two drillings, promotes
The leachate on injection hole periphery is to suction eye diffusive migration.
Preferably technical solution is：The vertical divider system is arranged on Active workings areas outside, and gos deep into tailing heap
The velatively waterproof layer of body bottom, the vertical divider system are prevented using ground-connecting-wall, grouting curtain, sheet pile wall or flexible compound
Wall is oozed, the monitoring well is laid on the outside of Active workings vertical divider system, is uniformly distributed along surrounding or in direction of groundwater flow side
Downstream it is distributed with both sides, for monitoring influence of the leaching process to quality of groundwater in field.
A kind of tailing original position leaching system suitable for the tailing original position extract technology, including：
Leaching agent pumping system, it includes pumping equipment, fracture grouting pipe and jelly suction pipe, the pending ground to
Under be drilled with the injection hole and extraction hole of multiple spaced settings, insertion fracture grouting pipe in the injection hole, the extraction hole
Interior insertion jelly suction pipe, leaching agent are injected in the fracture grouting pipe using pumping equipment, and the leachate of formation utilizes pumping equipment
Extracted out by jelly suction pipe, and send to ground and leach liquid treating system processing；
Vertical divider system, lays along Active workings area peripheral edge, is set in closing or semi-closed structure；
Monitoring system, including monitoring well, for gather groundwater sample Beile manage, for measuring groundwater level
Water-level gauge and to monitor the Water Test Kits of underground water, wherein monitoring well is laid on the outside of Active workings vertical divider system.
Preferably technical solution is：The injection hole and the distribution form of extraction hole are two kinds of grid type or determinant, institute
The center that extraction hole in grid type well type is located at production unit is stated, injection hole is by spacing around extraction pore size distribution, determinant well type
In the respective arrangement in a row of extraction hole and injection hole.
It is using the beneficial effect after above-mentioned technical proposal：
Since tailing granularity is superfine and is influenced by deposition, the permeability and gas permeability inside tailing heap body are poor, difficult
To meet extract technology requirement, the present invention provides a kind of tailing original position extract technology and tailing original position leaching system, it, which is used, splits
Splitting the mode of slip casting improves the property noted of tailing heap body, leaching agent is come into full contact with the useful constituent in tailing heap body, improves
Leaching efficiency.
Secondary clear dig the invention avoids tailing is transported, and leaching operation can be directly carried out on tailing heap body, is saved
Project inputs, effectively can recycle useful constituent under the conditions of lower cost.
Equipment transhipment is convenient in the present invention, and operation unit division is flexible, and the selection of leaching agent is various, to it is various intricately
Shape condition and mineral type have broad applicability.
The present invention is by leaching-out technique in situ and vertical divider system and monitors system combined use, can realize to leaching
The effective barrier and monitoring of process, avoid the secondary pollution because caused by leaking leaching agent.
Brief description of the drawings
Fig. 1 is a kind of flow chart of tailing original position extract technology provided by the invention；
Fig. 2 is a kind of diagrammatic cross-section of tailing original position leaching system provided by the invention.
Fig. 3 is that a kind of fracture grouting of tailing original position leaching system provided by the invention acts on schematic diagram.
Fig. 4 is a kind of drilling grid distribution form A of tailing original position leaching system provided by the invention, determinant distribution
Form B.
Fig. 5 is that a kind of pumping of tailing original position leaching system of the present invention starches equipment schematic diagram.
In figure：
1 ground, 2 velatively waterproof layers, 3 injection holes, 4 fracture grouting pipes, 5 extraction hole, 6 jelly suction pipes, 7 initial liquid level lines,
8 precipitation funnels, 9 leaching agents, 10 leachates, 11 vertical divider curtains, 12 monitoring wells, 13 splitting surfaces, 14 edge penetration areas, 15
Diffusion region, 16 drilling machines, 17 air compressor machines, 18 high-pressure groutings pump, 19 slurry cans, 20 pulpers, 21 tailing heap bodies, 22 useful constituents,
23 ground connecting pipelines.
Embodiment
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings, so that those skilled in the art can
To be better understood from the present invention and can be practiced, but illustrated embodiment is not as a limitation of the invention.
The present invention provides a kind of tailing original position extract technology, as shown in Figure 1, including below scheme：
Step 1：Multiple 3 Hes of injection hole are drilled with downwards in the ground 1 of the Active workings of pending tailing using drilling machine 16
Extraction hole 5, with 5 aperture of extraction hole in the range of φ 50-70mm, spacing combines live diametral compression test and determines injection hole 3；Injection
Hole 3 and extraction hole 5 are uniformly arranged, and are also mutually uniformly arranged between injection hole 3 and extraction hole 5, it is preferable that as shown in Figure 3
Grid distribution form or determinant distribution form lay.The depth of injection hole 3 and extraction hole 5 meets tailing to be treated
Depth-set, injection hole 3 commonly reach velatively waterproof layer 2 or below 2m, and extraction hole 5 is in 2 top 1-2m of an impermeable stratum left sides
Right position, when actual extract technology is implemented.
Step 2：Vertical divider system, the vertical divider are laid in the periphery in the Active workings region of pending tailing
System is made of the vertical divider curtain 11 for being arranged in Active workings areas outside, and vertical divider curtain 11 will leach operation area
The periphery barrier in domain, it can be in that closing or semi-closed structure, its buried depth need to reach velatively waterproof layer 2
Interior or depth is in below 2m in velatively waterproof layer, can effectively prevent from having severe corrosive or the leaching agent of toxicity 9 and leach
Liquid 10 migrates, and causes secondary pollution to prevent tailing from leaking in leaching process.The vertical divider curtain 11 can use more
Kind form, including ground-connecting-wall, grouting curtain, sheet pile wall, flexible compound cut-pff wall etc., according to implementing, construction is specifically chosen.
Step 3：Monitoring system is laid in the periphery of the vertical divider system, is uniformly distributed along surrounding or in underground water
Direction downstream and both sides distribution are flowed to, for influence of the leaching process to quality of groundwater in monitoring results place, including interval
Multiple monitoring wells 12 are set, the orderly surrounding for being distributed in vertical divider system of layout pitch or along direction of groundwater flow direction
Downstream and both sides.When extract technology starts, Beile's pipe collection underground water can be utilized, with the water of water-level gauge measurement underground water
Position, with Water Test Kits monitoring the parameter of underground water；
Step 4：Fracture grouting pipe 4 is plugged in required injection hole 3, jelly suction pipe 6 is inserted into required extraction hole 5, is split
The plastic tube that Grouting Pipe 4 and jelly suction pipe 6 generally use internal diameter φ 40-60 is split, every 33- on the tube wall of the fracture grouting pipe 4
50cm bores one group and penetrates slurry hole.Mud is poured between the fracture grouting pipe 4 and injection hole 3 to fill fracture grouting pipe 4 and drilling
Gap between wall, forms one layer of very thin mudcake, plays borehole wall-protection and lubrication, to prevent borehole collapse or be noted
Slurry influences.Generally 1.1~1.25g/cm is generally with clay water slurry or clays bentonite mud off, unit weight3。
Step 5：Using fracture grouting mode, leaching agent 9 is injected into injection hole 3 using pumping equipment is leached, specifically
For：
The leaching agent 9 is uniformly stored in spare in slurry can 19 by 20 internal modulation of pulper in advance, and slurry can 19 is logical
Cross ground connecting pipeline 23 with high-pressure grouting pump 18 to be connected, and injected together with pressure-air prepared by air compressor machine 17 in place
Fracture grouting pipe 4, in leaching process, leaching agent 9 is monitored by SEA LEVEL VARIATION in adjacent drilling and injection pressure change
Effect is injected, effect is injected according to leaching agent 9, adjusts the parameters such as injection rate, injection pressure, distribution form, pitch of holes.
During slip casting, the leaching agent 9 in fracture grouting pipe 4 is applied with additional compression by air compressor machine to surrounding stratum, makes
Tailing heap body 21 cleaves in the plane of principal stress, as shown in Fig. 2, forming splitting surface 13, leaching agent 9 passes through note
The edge penetration face 14 and diffusion region 15 for entering 13 periphery of hole 3 and splitting surface carry out instead with the useful constituent 22 in tailing heap body 21
Should.
Step 6：Leaching agent 9 is spread, and is reacted with the useful constituent 22 in tailing heap body 21, and can leached
During, using Beile's pipe collection underground water in the monitoring well 12, with the water level of water-level gauge measurement underground water, use water quality
Analyzer monitors the water quality parameter of underground water, including the parameter such as pH, oxidation-reduction potential, electrical conductivity, dissolved oxygen, turbidity, for
The undetectable index in scene, can the qualified third party's detection of censorship.
Step 7：After the injection of leaching agent 9, the diffusion and reaction of leaching agent 9 need a period of time, specifically during reaction
Between determined according to parameters such as the selection of leaching agent 9, injection depth, Leach reaction times, when after reaction, reaction is formed
Leachate 10 sent by the extraction of jelly suction pipe 6 and leach liquid treating system to ground and carry out subsequent treatment, and leachate 10 is carried out
Composition detection；According to 10 testing number of leachate of the extraction of jelly suction pipe 6 it is judged that whether extract technology is handled completely, such as not completely,
Continue step 5 and step 6, extend reaction time or adjustment injection parameter；Stop the injection and leaching of leaching agent 9 if completely
Go out the extraction of liquid 10, complete leaching process.
As shown in Figure 2 and Figure 5, the present invention also provides a kind of tailing original position leaching system, including：
Leaching agent pumping system, including pumping equipment, fracture grouting pipe 4 and jelly suction pipe 6.Leaching agent 9 uses fracture grouting
Mode, pumping equipment are composed of a series of equipment.Multiple spaced settings are drilled with downwards by pending ground 1
Injection hole 3 and extraction hole 5, the depth being drilled with are set as needed.Fracture grouting pipe 4 is inserted into injection hole 3, to extraction hole 5
Interior insertion jelly suction pipe 6, the surface design of the fracture grouting pipe 4 along tube wall is multiple to penetrate slurry hole, and the aperture for penetrating slurry hole meets
Use is actually needed, does not do special provision.The pumping equipment by ground connecting pipeline 23 respectively with fracture grouting pipe
4th, jelly suction pipe 6 connects；
Vertical divider system is mainly made of the vertical divider curtain 11 for being arranged in Active workings areas outside, vertical resistance
The barrier of operating area periphery will be leached every curtain 11, in closing or semi-closed structure, wherein when pending operating area area
It is larger, it is necessary to when being divided into multiple zonules and individually being handled, vertical divider system need to be distributed in whole pending entirety
The periphery of big operating area, using closing or semi-closed structure.Since 21 internal particle granularity of tailing heap body is superfine, and by heavy
Product function influence, the infiltration coefficient of 21 bottom of tailing heap body diminish, and can be considered as velatively waterproof layer when reaching a certain level
2, it can effectively prevent the leakage of leaching process, vertical divider curtain 11 gos deep into velatively waterproof layer 2 or below 2m, with it
The barrier system of closing is formed, can effectively prevent that there is severe corrosive or the leaching agent of toxicity 9 and leachate 10 to migrate, prevent
Secondary pollution is caused in leaching process.
Monitoring system, it includes monitoring well 12, is managed, for gathering the Beile of groundwater sample for measuring Groundwater
Position water-level gauge and to monitor the Water Test Kits of underground water, wherein monitoring well 12 is laid in Active workings vertical divider curtain
The outside of curtain 11, the monitoring system are used for monitoring vertical divider its exterior whether is diffused out in leaching process.It is described vertical
Baffle system and the monitoring well in outside 12 as barrier, monitoring measure and set, leach and barrier, to monitor be relatively only
Vertical, monitoring well is used to observe outside pollution, prevents leaching process leaching agent, leachate to be diffused into periphery, causes environment dirty
Dye.
In the present invention pumping equipment by drilling machine 16, air compressor machine 17, pulper 20, slurry can 19, high-pressure grouting pump 18,
A series of equipment such as face connecting pipeline 23, drawing liquid pump are composed.Leaching agent 9 used is uniform in 20 internal modulation of pulper, slurrying
Material, the quantity of machine 20 are adjusted flexibly according to the species and dosage of leaching agent 9, and the leaching agent 9 modulated is temporarily stored in slurry can 19
Interior spare, slurry can 19 is connected by ground connecting pipeline 23 with high-pressure grouting pump 18, and the high pressure sky prepared with air compressor machine 17
Gas injects the fracture grouting pipe 4 in place together, and a set of pumping liquid-injection equipment can be connected with multiple fracture grouting pipes 4 at the same time, but a
Number is no more than 20, while a whole set of pumping equipment can be needed in different injection holes 3 and extraction hole 5 according to injection in the venue
Between move.In leaching process, injected by SEA LEVEL VARIATION in adjacent drilling and injection pressure change to monitor leaching agent 9
Effect, injects effect according to leaching agent 9, adjusts the parameters such as injection rate, injection pressure, distribution form, pitch of holes.During observation
Adjacent drilling need not be individually drilled with, and directly be observed using adjacent injection hole and extraction hole；Before technique is determined,
By some monitorings of adjacent holes position, to adjust above-mentioned parameter, so that it is determined that most suitable process conditions.
Drilling machine 16 drills in the hole of calibration position, and drilling can be used for as injection hole 3 or extraction hole 5, injection hole at the same time
3 are uniformly distributed with extraction hole 5 in certain forms, can by the distribution form of injection hole 3 and extraction hole 5 as shown in A in Fig. 4 and B
To be divided into two kinds of grid type and determinant, extraction hole is located at the center of production unit in grid type well type, and injection hole 3 is by certain
Spacing is distributed around extraction hole 5, the extraction hole 5 in determinant well type and 3 respective arrangement in a row of injection hole, injection hole 3 and extraction
In the range of φ 50-70mm, spacing combines live diametral compression test and determines in hole 5 aperture.Insertion fracture grouting pipe 4 in injection hole 3,
Insertion jelly suction pipe 6 in extraction hole 5, fracture grouting pipe 4 and jelly suction pipe 6 generally use the plastic tube of internal diameter φ 40-60, described to split
Split on the tube wall of Grouting Pipe 4 every 33-50cm bore one group penetrate slurry hole, poured between fracture grouting pipe 4 and injection hole 3 mud with
Gap of the filling (but endless totally-enclosed, only to form the layer of protection hole wall) between fracture grouting pipe 4 and the wall of a borehole, forms one layer
Very thin mudcake, plays borehole wall-protection and lubrication, to prevent borehole collapse or be influenced by slip casting.
Jelly suction pipe 6 directly can be taken out slurry power and be set by ground connecting pipeline 23 or other single connecting line connections
Standby such as drawing liquid pump, the opposite side connection ground of drawing liquid pump leach liquid treating system and carry out subsequent treatment, the extraction leaching of jelly suction pipe 6
During liquid 10, the initial liquid level line 7 around extraction hole 5 declines, and forms a precipitation funnel 8 centered on extraction hole 5,
Hydraulic gradients are formed among two drillings, promote the leachate 10 on 3 periphery of injection hole to 5 diffusive migration of extraction hole.The injection
Hole depth to velatively waterproof layer or below 2m, the extraction hole 5 is in velatively waterproof layer more than 2, and general distance is relatively not
2 general 1-2m of pervious bed or so.
The selection of leaching agent 9 determines according to tailing mineral composition, environmental condition and property of raw material, the applicable acid of this technique
The variety classes leaching agents such as method leaching agent, alkaline Leaching agent, Microorganism Leaching agent or its joint leaching agent, leaching agent 9 is certain
Additional compression is applied with to surrounding tailing heap body 21 by fracture grouting pipe 4 under grouting pressure, tailing heap body 21 is perpendicular to master
Cleaved in the plane of stress, form splitting surface 13, so that the diffusion region increase of leaching agent 9, leaching agent 9 pass through injection
Edge penetration face 14 and diffusion region 15 and the useful constituent 22 in tailing heap body 21 on 13 periphery of hole 3 and splitting surface are reacted,
Under the collective effect of grouting pressure and hydraulic gradient, the leachate 10 for reacting formation is taken out by the jelly suction pipe 6 in extraction hole 5
Go out to send to ground 1 and leach liquid treating system processing.
Vertical divider system mainly seals pollutant up for safekeeping using underground barrier or changes direction of groundwater flow, to reach control
The purpose of level of pollution migration.In order to achieve the purpose that to prevent leaching agent 9 or leachate 10 from migrating in the present invention, it is desirable to vertical
Barrier curtain 11 has relatively low permeability, while baffle system will have preferable continuity and durability, and material of main part has
Certain stability and corrosion resistance, can meet to leach effective barrier in operation timeliness.Vertical divider curtain 11 can use
Diversified forms, including ground-connecting-wall, grouting curtain, sheet pile wall, flexible compound cut-pff wall etc..
Monitoring system is laid in the outside of Active workings vertical divider curtain 11, is uniformly distributed along surrounding or in subsurface flow
It is distributed to direction downstream and both sides, for monitoring influence of the leaching process to quality of groundwater in field, including monitoring well 12, shellfish
Strangle pipe, water-level gauge and Water Test Kits.In order to grasp the influence after leaching agent 9 injects to periphery place soil and underground water,
Underground water is carried out in 9 injection process of leaching agent and after the completion of leaching by monitoring well 12 to be monitored.Water-level gauge is used to measure ground
Lower water water level, Beile pipe be used for gather groundwater sample, Water Test Kits to monitor the pH of underground water, oxidation-reduction potential,
The parameters such as electrical conductivity, dissolved oxygen, turbidity, can the qualified third party's detection of censorship for the undetectable index in scene.
The present invention effectively can recycle useful constituent under the conditions of lower cost, it, which combines vertical divider system, to avoid
Secondary pollution caused by leaching process, can be widely applied to the in situ of heavy metal tailing and leaches and obstruct, avoid tailing heap
The loss of problems caused by depositing and resource wastes.
Embodiment described above is only to absolutely prove preferred embodiment that is of the invention and being lifted, protection of the invention
Scope not limited to this.The equivalent substitute or conversion that those skilled in the art are made on the basis of the present invention, in this hair
Within bright protection domain.Protection scope of the present invention is subject to claims.
Claims (10)
1. a kind of tailing original position extract technology, it is characterised in that including following steps：
Step 1：Injection hole and extraction hole are drilled with the Active workings of pending tailing；
Step 2：Vertical divider system is laid in the Active workings area peripheral edge of pending tailing；
Step 3：Monitoring system is laid in the periphery of vertical divider system；
Step 4：Fracture grouting pipe is plugged in required injection hole, jelly suction pipe is inserted into required extraction hole；
Step 5：Using fracture grouting mode, leaching agent is injected into injection hole；
Step 6：Leaching agent is spread, and is reacted with the useful constituent in tailing heap body；；
Step 7：After reaction, react formation leachate extract out and send to ground leach liquid treating system subsequently located
Reason, and leachate is detected, according to testing number it is judged that whether extract technology is handled completely, such as not completely, continue step
Five and step 6, extend reaction time or adjustment injection parameter；Stop the injection of leaching agent and the extraction of leachate if completely,
Complete leaching process.
2. tailing original position according to claim 1 extract technology, it is characterised in that the injection hole is with extraction hole in uniform
Distribution.
3. tailing original position according to claim 2 extract technology, it is characterised in that the distribution of the injection hole and extraction hole
Form is grid type or determinant, and extraction hole is located at the center of production unit in the grid type well type, and injection hole is enclosed by spacing
Around extraction pore size distribution, the respective arrangement in a row of extraction hole in determinant well type and injection hole.
4. tailing original position according to claim 1 extract technology, it is characterised in that the injection hole is with extraction hole aperture
φ 50-70mm, the fracture grouting pipe and jelly suction pipe use plastic tube of the internal diameter for φ 40-60, on the tube wall of the injection hole
One group, which is bored, every 33-50cm penetrates slurry hole.
5. tailing original position according to claim 1 extract technology, it is characterised in that the fracture grouting pipe and injection hole it
Between pour into mud to fill the gap between fracture grouting pipe and the wall of a borehole.
6. tailing original position according to claim 1 extract technology, it is characterised in that the leaching agent is applicable in acid-base method leaching
Agent, Microorganism Leaching agent or its joint leaching agent.
7. tailing original position according to claim 1 extract technology, it is characterised in that extracted out in the jelly suction pipe of the extraction hole
During leachate, the initial liquid level line around extraction hole declines, and a precipitation funnel centered on extraction hole is formed, at two
Hydraulic gradient is formed among drilling, promotes the leachate on injection hole periphery to suction eye diffusive migration.
8. tailing original position according to claim 1 extract technology, it is characterised in that the vertical divider system is arranged on work
On the outside of industry floor area, and go deep into the velatively waterproof layer of tailing heap body bottom, the vertical divider system is using ground-connecting-wall, note
Curtain, sheet pile wall or flexible compound cut-pff wall are starched, the monitoring well is laid on the outside of Active workings vertical divider system, along surrounding
It is uniformly distributed or is distributed in direction of groundwater flow direction downstream and both sides, for monitors in field leaching process to the shadow of quality of groundwater
Ring.
A kind of 9. tailing original position leaching system of tailing original position extract technology suitable for described in claim 1, it is characterised in that
Including：
Leaching agent pumping system, it includes pumping equipment, fracture grouting pipe and jelly suction pipe, and the pending ground is drilled with downwards
The injection hole and extraction hole of multiple spaced settings, the interior insertion fracture grouting pipe of the injection hole, the interior insertion of the extraction hole
Jelly suction pipe, leaching agent are injected in the fracture grouting pipe using pumping equipment, and the leachate of formation passes through pumping using pumping equipment
Pipe extraction is starched, and send to ground and leaches liquid treating system processing；
Vertical divider system, lays along Active workings area peripheral edge, is set in closing or semi-closed structure；
Monitoring system, including monitoring well, Beile's pipe, the water-level gauge for measuring groundwater level for gathering groundwater sample
With to monitor the Water Test Kits of underground water, wherein monitoring well is laid on the outside of Active workings vertical divider system.
10. tailing original position according to claim 9 leaching system, it is characterised in that the injection hole and point of extraction hole
Cloth form is two kinds of grid type or determinant, and extraction hole is located at the center of production unit in the grid type well type, and injection hole is pressed
Spacing is around extraction pore size distribution, the respective arrangement in a row of extraction hole in determinant well type and injection hole.
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| CN109174905A (en) * | 2018-08-29 | 2019-01-11 | 长春黄金研究院有限公司 | A kind of cyaniding tailing library in-situ immobilization processing method |
| CN109772856A (en) * | 2019-01-08 | 2019-05-21 | 长春黄金研究院有限公司 | A kind of cyaniding tailing slag Tailings Dam in-situ immobilization processing method |
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| CN111622269A (en) * | 2020-06-01 | 2020-09-04 | 中国地质科学院矿产综合利用研究所 | Method for preventing and controlling pollution of ion type rare earth shallow groundwater |
| CN113293286A (en) * | 2021-05-31 | 2021-08-24 | 万宝矿产有限公司 | In-situ ore blending method |
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