CN110318369A - The high tailings impoundment of microfine containing mud and technique of building a dam - Google Patents
The high tailings impoundment of microfine containing mud and technique of building a dam Download PDFInfo
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- CN110318369A CN110318369A CN201810273645.0A CN201810273645A CN110318369A CN 110318369 A CN110318369 A CN 110318369A CN 201810273645 A CN201810273645 A CN 201810273645A CN 110318369 A CN110318369 A CN 110318369A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C5/00—Apparatus in which the axial direction of the vortex is reversed
- B04C5/24—Multiple arrangement thereof
- B04C5/28—Multiple arrangement thereof for parallel flow
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/10—Dams; Dykes; Sluice ways or other structures for dykes, dams, or the like
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/12—Revetment of banks, dams, watercourses, or the like, e.g. the sea-floor
- E02B3/128—Coherent linings made on the spot, e.g. cast in situ, extruded on the spot
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/11—Hard structures, e.g. dams, dykes or breakwaters
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Abstract
The present invention relates to a kind of high tailings impoundment of microfine containing mud and technique of building a dam, the processing step is as follows: 1) efficiently large or fine granule separation is realized in desliming, and microfine sludge is unpowered to clear water zone in being put in storage；2) dilution, waterpower alluviation disperse ore drawing before cyclowass underflow dam；3) cyclowass underflow subregion alternating ore drawing is built a dam, and is extended ore drawing and is constructed manually dry beach；4) stockpiling of microfine high-concentration tailings, which is built a dam, operates monitoring process；The program effective solution safety and economy problems of tailings impoundment is realized and contains mud, high concentration, high viscosity, fine tailings low cost heap dam with high, and tailing accumulation body is stable and meets dry beach length of specification and design requirement and adjusts the safety requirements such as flood height.
Description
Technical field
The present invention relates to a kind of tailings impoundment techniques, and in particular to the high tailings impoundment of microfine containing mud and technique of building a dam belong to
In tailings glass technical field.
Background technique
Currently, the major way of tailings glass is stored up in earth's surface Tailings Dam, tailing dam is most important structure in Tailings Dam
Object is built, pollution sources and security risk are important.Tailings Disposal technique can be divided into three categories: one kind is using soil, stone material
Heap builds initial dam, to the coarse grain tailing later period frequently with the conventional tailing disposing technique of Tailing dam construction, according to later period tailing heap dam side
The different of formula can be divided into upper reaches method, downstream method, middle collimation method Tailing dam construction technique again；Second class be tailings dam all using soil,
Stone material is built up, and is chiefly used in that tailings particles are very thin, concentration height cannot be used for the case where building a dam；Third class is dry piling tailing
Library drains heap Tailings Disposal etc. using the stockpiling of concentration solidification tailings paste, using filters pressing is dry.
China's Tailings Dam engineering starts from five sixties of last century, and upper reaches method is mostly used to build a dam technique greatly, has technique letter
Advantage single, at low cost, construction is fast, convenient for management.When the thicker person of tailing granularity (d > 0.074mm content is greater than 45% or so)
Direct alluviation method can be used to build a dam, formed and meet the required dry beach length of specification and adjust flood height, the infiltration of tailing accumulation body
Property and stability meet safety requirements.When the thinner person of tailing granularity (d < 0.074mm content plasticity index between 55%-75%
Ip < 10) it cyclone classification alluviation method can be used through research practice builds a dam.For example, sharp mountain is directed to tailing fine fraction content height (d <
0.074mm content is 70% or so, the tail silt of plasticity index Ip < 10) it is built a dam using cyclone classification tailings, it reduces and builds
Dam cost solves that tailing accumulation body poor permeability, shearing strength be low and the stability safety problems such as not enough；Beiminghe iron mine pair
The Tailings Slurry of tailing fine fraction d < 0.074mm content 63% or so is built a dam using cyclone classification tailings, and tailing is greatly lowered
Library is built a dam cost, solves that the axis of dam is shorter, and tailings does not have the enough infiltration discharging consolidation time before dam, is not easy to artificial and machine
The problem of tool operation.The Tailings Dam that wire type is built a dam in is not much in China to be seen, only No. 4 Tailings Dams of Dexing copper mine use at present
Middle wire type damming method.Code requirement " d >=0.074mm tailing after downstream formula or the classification of middle reaches formula Tailing dam construction for building a dam
Granule content should not be preferably greater than 10% " less than 75%, d≤0.02mm tailings particles content, and centre-line damming is exactly in the early stage
The axis of dam position of dam updrift side, using cyclone classification, coarse sand accumulation tailing is built a dam, and fine fraction Tailings Slurry flows into certainly
It is settled in dam, but can collimation method tailing dam body stability and the principal element that implement be the coarse granules in tailings in influencing
Content.
With the exploitation of fine-grained disseminated grain ore, grinding particle size the more grinds the more thin, and the tailing of discharge is also thinner.Chang Yinwei ore pulp grain
Degree is thin, clay content is big, the extremely difficult sedimentation of these subparticles, is in suspended state in library, externally drains water quality, Tailing dam construction generates
Totally unfavorable influence." tailings facilities design specification " GB50863-2013 is clearly stipulate that for wet type Tailings Dam, when full tail
When mine particle superfine (d < 0.074mm content is greater than 85% or d < 0.005mm content and is greater than 15%), preferably uses and once builds dam,
And it can built by separate periods；When Total tailing particle is superfine and using Tailing dam construction, the dam experimental study of Ying Jinhang tailing heap.Meishan iron mine
Into deep mining, a large amount of kaolinization andesites are mixed into raw ore, water-swellable, argillization is serious, and it is most of to enter tailing, enter
Library fine grained Contents of Tailings is higher, and d < 0.074mm content is 14.89% in 80% or so, d < 0.005mm content, and plasticity refers to
Number Ip be greater than 10, reach 13 belong to silty clay soil, diaphragm pump convey tailings concentration high-moisture it is low, moisture is in sedimentary tailing
It is difficult to be discharged, tailing is in a saturated state for a long time, and the gradient is small to be difficult to form the dry beach length for meeting design requirement and adjust flood high
Degree.Since slowly, without bearing capacity, the Tailing dam construction on existing beach face is it is difficult to ensure that tailing dam for beach face deposition consolidation before dam
Stabilization, first and second phase sub- dam is rolled using native stone builds a dam, each issue of 4 meters of sub- height of dam, 12 meters wide, and current each issue native stone cost of building a dam reaches
10000000 yuan, also take up part storage capacity." tailings facilities design specification " GB50863-2013 is compareed, plum mountain tailing category microfine is high
Concentration tailing is not suitable for routine tailings and builds a dam technique, preferably use it is primary build dam (can built by separate periods), it is plum mountain tailing fine size, dense
The gradation that degree is high and clay content is high and special is constituted, and is built a dam using direct alluviation method and conventional cyclone classification tailings is built a dam
The key indexes such as dry beach length, reservoir capacity for flood control, safe superelevation, the gradient are caused not to be able to satisfy related specification requirement, designing institute suggests
It is built a dam using a barren rock, but barren rock source is insufficient and higher cost of building a dam causes scheme to be difficult to carry out.If can be ground by test
Study carefully, storage granularity d < 0.074mm content is solved in 80% or so, d < 0.005mm content 15% using Tailing dam construction new process
Left and right, the safety and economy problems of silty clay tailings impoundment of the plasticity index Ip greater than 10 will improve what Tailings Dam was built a dam
Technical level, building a dam to similar microfine high-concentration tailings stockpiling has very big reference.
Summary of the invention
The present invention exactly for the technical problems in the prior art, provide a kind of high tailings impoundment of microfine containing mud and
It builds a dam technique, mainly technical problem to be solved is the high silty clay tail containing mud, high concentration, high viscosity and microfine to the present invention
(d < 0.074mm content is greater than the peace of 10) stockpiling in 80% or so, d < 0.005mm content 15% or so, plasticity index Ip to mine
Complete and economy problems realize and contain mud, high concentration, high viscosity, fine tailings low cost heap dam with high, tailing accumulation body it is stable and
Meet the dry beach length of specification and design requirement and adjusts the safety requirements such as flood height.
To achieve the goals above, technical scheme is as follows, a kind of high tailings impoundment of microfine containing mud with build a dam
Technique, which is characterized in that the processing step is as follows:
1) efficiently large or fine granule separation is realized in desliming, and microfine sludge is unpowered to clear water zone in being put in storage；
2) dilution, waterpower alluviation disperse ore drawing before cyclowass underflow dam；
3) cyclowass underflow subregion alternating ore drawing is built a dam, and is extended ore drawing and is constructed manually dry beach；
4) stockpiling of microfine high-concentration tailings, which is built a dam, operates monitoring process.
As an improvement of the present invention, large or fine granule separation, specific as follows, choosing are realized in efficient desliming in the step 1)
It selects 12 efficient cyclowass and realizes large or fine granule separation, cyclowass structural parameters: overflow caliber 80mm, sand setting bore
40mm, feed inlet equivalent diameter 78mm, cyclone shell of column effective height 345mm, 20 ° of cyclone cone angle；Cyclowass
Progressive operation parameter: feed thickness 45%-47%, operating pressure 0.12-0.20MPa, work number of units 3-6 platform；Cyclowass
- 200 mesh content of overflow is greater than 91% or more, and -200 mesh content of cyclowass sand setting is lower than 28%；12 are evenly arranged before dam
Cyclowass, ore drawing is built a dam before the direct dam of sand setting, and overflow sludge, which collects, freely sinks to 150 meters in storage area outer clear water zones
Drop.
As an improvement of the present invention, described to meet the gravity flow of overflow sludge, sludge overflow manifold trunk is to two sides dam abutment
Direction is set along slope 1.0%, sludge overflow delivery pipe along two sides library frame side, and into library, along slope 2.0%, fill dam is averaged outer slope in direction
Than 1:5.0,30 meters of height of dam, for guarantee tailing accumulation body to final design absolute altitude stability, sludge overflow discharge mouth at least away from
(Tailings Dam final design absolute altitude dam site inner slope must be greater than) in library from beach top 150m.The high tailings impoundment of microfine containing mud with build a dam
Technique top view (see Fig. 2)；The high tailings impoundment of microfine containing mud and technique sludge pipe gravity flow pipeline layout drawing of building a dam.
As an improvement of the present invention, dilution, waterpower alluviation dispersion before cyclowass underflow dam in the step 2)
Ore drawing, specific as follows, after the concentration of efficient concentration pond, Tailings Slurry concentration is increased to 45% or more, and high-concentration ore slurry is through diaphragm pump
Remote conveying is sent to the coarse granule underflow density obtained before dam through cyclowass and is up to 70-85%, not diluted cyclone
Underflow coarse granule ore pulp because concentration it is higher caused by poor fluidity, no waterpower grading effect, beach face be squeeze wriggling forward traveling, stream
The similar protuberance of dynamic state, which becomes silted up, to be squeezed, and flow process has no grading effect, deposits after a period of time beach face grade close to 0%, and tail
Mine accumulation body permeability is very poor, beach face intensity is low, does not consolidate for a long time；Increase dilution water in underflow sand setting collecting vessel, guarantees bottom
Mine concentration is banished lower than 35%, underflow pipe disperses ore drawing, is classified by waterpower alluviation, and formation dam body is more closely knit, precipitation fractionation effect
Fruit is preferable, and the flowing matter sludge (< 0.019mm) and clay (< 0.005mm) carried secretly in underflow are flushed in library, and coarse sand is heavy
Product is before dam, and the gradient and the draining osmotic effect for forming dam facing are preferable, and beach face consolidation is fast, intensity is high.
As an improvement of the present invention, step 3) the cyclowass underflow subregion alternating ore drawing is built a dam, and extension is put
It is specific as follows that mine constructs manually dry beach, selects 12 FX250-GX cyclowass, cyclowass is along the equidistant cloth of the axis of dam
It sets on dam crest platform, using steel bracket integral erection, antenna height 4.0m, and meets the gravity flow of overflow sludge and require, realize
Unpowered conveying, cyclowass bracket need to be moved as tailing dam gradually rises, and 12 before dam cyclone is divided into
Two groups left and right (every group 6), ore drawing divides arranged on left and right sides alternately on dam, carries out subregion using the interim sub- ridge, from dam before to
Ore drawing in dam, dam facing tailings are smooth to slope 1% suitable into library.When tailings beach top mark up to corresponding sub- dam crest absolute altitude when, lengthen
Underflow pipe extends ore drawing, until the entire beach face in the area reaches requirement height, ore drawing operation is switched to other side；It uses simultaneously
Tailings carries out the sub- Ba Dui of the side region and builds before dam, and so on alternately, meets normal production and beach face uniformly rises
It is required that.
As an improvement of the present invention, step 4) the microfine high-concentration tailings stockpiling, which is built a dam, operates monitoring process tool
Body is as follows, according to the tailing amount and pressure of discharge, opens 3-4 root ore drawing branch pipe, and cyclone pressure is 0.12-0.25MPa, is guaranteed
Grading effect, cyclone to 2 times/day of record of the detection of mine, underflow and effluent concentration, ore drawing concentration 1 time after each draw-point dilution/
It, 1 times/day of fineness test；1 time/month of dam seepage line monitoring record, flood season 1 times/week of monitoring record weekly are clear at overflow well
1 times/day of the monitoring record of water layer.Dilution water is adjusted according to ore drawing situation, ore drawing concentration is forbidden not dilute less than 35% after dilution
Mine is discharged, ore drawing place is adjusted in time, makes tailing uniform deposition, so that plum mountain mountain scene Tailings Dam, which meets four, waits Safety of Tailings Dam skill
Art requirement: the dam beach Qian Gan length > 50m keeps enough reservoir capacity for flood control and clarifies distance, the big vast height > 1.5m of tune, at overflow well
Clear water layer height > 0.5m, cannot be big vast highly instead of safe superelevation, safe superelevation > 0.5m with adjusting.
Compared with the existing technology, the invention has the advantages that, the present invention is dilute by the desliming of cyclone high-effective classifying, underflow
It releases dispersion ore drawing and subregion extends ore drawing, realize that a kind of high mud, high concentration, high viscosity and microfine tailing low cost tailings of containing is built
Dam technique, the indexs such as tailing accumulation body permeability, dam stability, saturation buried depth, dry beach length, reservoir capacity for flood control meet design
And code requirement, the safe and stable operation of Tailings Dam is realized, the weight that Tailings Dam is unsatisfactory for technical specification of security requirement is eliminated
Big hidden danger solves Tailings Dam and builds a dam and the conflict in continuous production.Meishan iron mine is built a dam substitution using the invention patent tailings
The barren rock that former designing institute suggests is built a dam, and every meter of saving is built a dam more than 300 ten thousand yuan of cost, is significantly reduced very much production cost, is kept away
Exempt from the fried stone that cuts into a mountain, reduces environmental pollution and ecological disruption.The equal Safety of Tailings Dam skill of plum mountain mountain scene Tailings Dam satisfaction four simultaneously
Art requirement: the dam beach Qian Gan length > 50m keeps enough reservoir capacity for flood control and clarifies distance, the big vast height > 1.5m of tune, at overflow well
Clear water layer height > 0.5m, cannot be big vast highly instead of safe superelevation, safe superelevation > 0.5m with adjusting.
Detailed description of the invention
Fig. 1 is cyclowass underflow sand setting collecting vessel；
Fig. 2 is the high tailings impoundment of microfine containing mud and technique top view of building a dam；
Fig. 3 is the high tailings impoundment of microfine containing mud and technique front view of building a dam；
Fig. 4 is the high tailings impoundment of microfine containing mud and technique sludge pipe gravity flow pipeline arrangement schematic diagram of building a dam.
Specific embodiment:
In order to deepen the understanding of the present invention, the present invention is described in detail with reference to the accompanying drawing.
Embodiment 1: referring to Fig. 1-Fig. 4, a kind of high tailings impoundment of microfine containing mud and technique of building a dam, the processing step
It is as follows:
1) efficiently large or fine granule separation is realized in desliming, and microfine sludge is unpowered to clear water zone in being put in storage；
2) dilution, waterpower alluviation disperse ore drawing before cyclowass underflow dam；
3) cyclowass underflow subregion alternating ore drawing is built a dam, and is extended ore drawing and is constructed manually dry beach；
4) stockpiling of microfine high-concentration tailings, which is built a dam, operates monitoring process.
Large or fine granule separation, specific as follows, Gao Hanni, high concentration, microfine tail are realized in efficient desliming in the step 1)
Mine realizes large or fine granule separation, ore drawing is built a dam before coarse granule dam, microfine sludge overflow by special efficient cyclowass
It is settled with pipeline self to storage area clear water zone.12 FX250-GX cyclowass are selected, cyclone is equidistant along the axis of dam
It is arranged on dam crest platform.Cyclowass structural parameters: overflow caliber 80mm, sand setting bore 30-40mm, feed inlet equivalent are straight
Diameter 78mm, cyclone shell of column effective height 345mm, 20 ° of cyclone cone angle.Cyclowass progressive operation parameter: pan feeding
Concentration 45%-47%, operating pressure 0.12-0.20MPa, work number of units 3-6 platform.Using steel bracket integral erection, set up high
4.0m is spent, and meets overflow self-flowing pastefill requirement, cyclowass bracket need to be moved as tailing dam gradually rises.It is de-
For mud cyclone feed using the straight-through upper dam feed of diaphragm pump Tailings transportation pipe overbottom pressure, feed pipe is DN273 superhigh molecular weight polyethylene
Alkene material is connect using DN100 ultra-high molecular weight polyethylene material branch pipe with every cyclowass material inlet on dam.To disappear
Except cyclone underflow " siphon " phenomenon, special underflow sand setting collecting vessel is shown in Fig. 1, the connection of bucket bottomAbrasion-resistant rubber pipe, side
Just underflow pipe is mobile and ore drawing operates.Sludge overflow pipe passes to overflow sludge manifold trunk, and overflow sludge is collected to dam abutment, through overflowing
Stream sludge delivery pipe is delivered to clear water zone in library and discharges, and sludge overflow manifold trunk and overflow delivery pipe are DN250 high molecular weight
Polyethylene material.To meet the gravity flow of overflow sludge, sludge overflow manifold trunk is to two sides dam abutment direction along slope 1.0%, sludge overflow
Delivery pipe is set along two sides library frame side, and into library, direction is along slope 2.0%.Fill dam is averaged outer slope ratio 1:5.0, and 30 meters of height of dam, to protect
Tailing accumulation body is demonstrate,proved to the stability of final design absolute altitude, sludge overflow discharge mouth (must be big in the library at least apart from beach top 150m
In Tailings Dam final design absolute altitude dam site inner slope).The high tailings impoundment of microfine containing mud and technique top view of building a dam, are shown in Fig. 2；Gao Han
Mud microfine tailings impoundment and technique front view of building a dam, are shown in Fig. 3；The high tailings impoundment of microfine containing mud and technique sludge gravity flow of building a dam
Piping diagram is shown in Fig. 4.Dilution, waterpower alluviation disperse ore drawing before cyclowass underflow dam in the step 2), specifically such as
Under, after the concentration of efficient concentration pond, Tailings Slurry concentration is increased to 45% or more, and high-concentration ore slurry is sent to through diaphragm pump remote conveying
The coarse granule underflow density obtained before dam through cyclowass is up to 70-85%, not diluted cyclone underflow coarse granule mine
Slurry because concentration it is higher caused by poor fluidity, no waterpower grading effect, beach face be squeeze wriggling forward traveling, flow regime is similar to grand
It rises to become silted up and squeeze, flow process has no grading effect, and beach face grade is close to 0% after depositing a period of time, and tailing accumulation body permeates
Property it is very poor, beach face intensity is low, for a long time do not consolidate；Increase dilution water in underflow sand setting collecting vessel, guarantees that underflow ore drawing concentration is low
In 35%, underflow pipe disperses ore drawing, is classified by waterpower alluviation, and formation dam body is more closely knit, and precipitation fractionation effect is preferable, underflow
The flowing matter sludge (< 0.019mm) and clay (< 0.005mm) of middle entrainment are flushed in library, before coarse sand is deposited on dam, are formed
The gradient and draining osmotic effect of dam facing are preferable, and beach face consolidation is fast, intensity is high.
Step 3) the cyclowass underflow subregion alternating ore drawing is built a dam, and is extended ore drawing and is constructed artificial dry beach specifically such as
Under, 12 FX250-GX cyclowass are selected, cyclowass is equally spaced on dam crest platform along the axis of dam, using steel
Bracket integral erection processed, antenna height 4.0m, and meet the gravity flow of overflow sludge and require, realize unpowered conveying, cyclowass
Bracket need to be moved as tailing dam gradually rises, and 12 before dam cyclone is divided into left and right two groups (every group 6), dam
Upper ore drawing divides arranged on left and right sides alternately, carries out subregion using the interim sub- ridge, from dam before into dam ore drawing, dam facing tailings it is smooth
To slope 1% suitable into library.When tailings beach top mark up to corresponding sub- dam crest absolute altitude when, lengthen underflow pipe and extend ore drawing, until should
The entire beach face in area reaches requirement height, and ore drawing operation is switched to other side；The side is carried out using tailings before dam simultaneously
The sub- Ba Dui in region is built, and and so on alternately, meets normal production and beach face uniformly rises requirement.
Step 4) microfine high-concentration tailings stockpiling, which is built a dam, operates that monitoring process is specific as follows, according to the tailing of discharge
Amount and pressure, open 3-4 root ore drawing branch pipe, cyclone pressure be 0.12-0.25MPa, guarantee grading effect, cyclone to mine,
Underflow and effluent concentration detection record 2 times/day, 1 times/day of ore drawing concentration, 1 times/day of fineness test after each draw-point dilution；Dam
1 time/month of body saturation monitoring record, flood season 1 times/week of monitoring record weekly, 1 times/day of the monitoring record of clear water layer at overflow well.
Dilution water is adjusted according to ore drawing situation, ore drawing concentration is forbidden not dilute ore drawing less than 35% after dilution, with adjusting ore drawing in time
Point makes tailing uniform deposition, so that plum mountain mountain scene Tailings Dam, which meets four, waits Safety of Tailings Dam technical requirements: the dam beach Qian Gan length >
50m keeps enough reservoir capacity for flood control and clarification distance, adjusts big vast height > 1.5m, clear water layer height > 0.5m at overflow well, cannot
It is big vast highly instead of safe superelevation, safe superelevation > 0.5m with adjusting.
Application Example 1: referring to Fig. 1-Fig. 4,
Present invention specific implementation is by Nanjing Meishan Metallurgy Co., Ltd., Baoshan Iron and Steel Group Mining Industry Subsidiary Company according to high concentration
Microfine tailings impoundment experimental design and research, construct according to scheme, in this way since implementation mountain scene Tailings Dam into
Row ore drawing, dry beach length have reached 60m or more and have met code requirement, and beach face grade is greater than 2% compared with being significantly improved before embodiment,
Beach face granularmetric composition and related soil test have also further demonstrated that the feasibility of Tailing dam construction.This patent scheme creatively solves
Having determined, (d < 0.074mm content is in 80% or so, d < for the high silty clay tailing containing mud, high concentration, high viscosity and microfine
0.005mm content 15% or so, plasticity index Ip are greater than the safety and economy problems of 10) stockpiling, and realization is contained with existing height
Mud, high concentration, high viscosity fine tailings low cost are built a dam, and tailing accumulation body is stable and the dry beach of satisfaction specification and design requirement is long
The safety requirements such as degree and tune flood height, it is ensured that the safety that Tailings Dam will be run from now on.
According to Tailing dam construction production operation situation, the drawings and specific embodiments are combined according to field application is practical, into one
Step illustrates the program: a kind of high tailings impoundment of microfine containing mud and technique of building a dam, the processing step are as follows:
1. realizing large or fine granule separation by efficient cyclowass.Cyclowass structural parameters: overflow caliber 80mm,
Sand setting bore 40mm, feed inlet equivalent diameter 78mm, cyclone shell of column effective height 345mm, 20 ° of cyclone cone angle.It is de-
Mud cyclone classification operating parameter: feed thickness 45%-47%, operating pressure 0.12-0.20MPa, work number of units 4-5 platform.It is de-
- 200 mesh content of mud cyclone overflow is greater than 91% or more, and -200 mesh content of cyclowass sand setting is lower than 28%.Before dam uniformly
Arrange 12 cyclowass, ore drawing is built a dam before the direct dam of sand setting, overflow sludge collect to 150 meters of outer clear water zones in storage area into
Row free settling.
2. dilution, waterpower alluviation disperse ore drawing before cyclowass underflow dam.Milltailings through efficient concentration pond be concentrated after,
Tailings Slurry concentration is increased to 45% or more, before high-concentration ore slurry is through diaphragm pump long distance delivery to dam, through cyclone classification desliming
Coarse granule underflow density about 70-85%, not diluted cyclone underflow Tailings Slurry because concentration it is higher caused by poor fluidity, flow shape
The similar protuberance of state, which becomes silted up, to be squeezed, and flow process has no grading effect, and beach face grade is close to 0 ° after depositing a period of time, and permeability pole
Difference.In order to solve the state and elimination that the high cyclowass underflow containing mud, high concentration, high viscosity and microfine tailing does not sort
Cyclone " siphon " phenomenon, special underflow sand setting collecting vessel is creative to increase dilution water in underflow sand setting collecting vessel, guarantees bottom
It flows sand setting ore drawing concentration and is lower than 35%, underflow pipe disperses ore drawing, the flowing matter sludge (< 0.019mm) carried secretly in underflow and glues
Grain (< 0.005mm) is flushed in library, and before coarse sand is deposited on dam, dam body is more closely knit, and precipitation fractionation effect is preferable, dam facing gradation
Good, the gradient and the draining osmotic effect for forming dam facing are preferable.
3. cyclowass underflow subregion alternating ore drawing is built a dam, extends ore drawing and construct manually dry beach.Select 12 FX250-
GX cyclowass, cyclowass are equally spaced on dam crest platform along the axis of dam.Using steel bracket integral erection, frame
If height 4.0m, and meet the gravity flow of overflow sludge and require, realize unpowered conveying, cyclowass bracket need to be accumulated with tailing
Dam gradually rises and moves.12 cyclones before dam are divided into left and right two groups (every group 6), and ore drawing point arranged on left and right sides is handed on dam
For progress, subregion is carried out using the interim sub- ridge.Into dam, ore drawing, dam facing tailings are smooth to slope 1% suitable into library before from dam.Work as tail
Sand waste top mark up to corresponding sub- dam crest absolute altitude when, lengthen underflow pipe and extend ore drawing, until the entire beach face in the area reaches requirement height
Degree, switches to other side for ore drawing operation；It carries out the sub- Ba Dui of the side region using tailings before dam simultaneously to build, and so on
Alternately, meet normal production and beach face uniformly rises requirement.
4. the stockpiling of microfine high-concentration tailings, which is built a dam, operates operational management system.Cyclone pressure inspection record every 4 hours 1
It is secondary；Cyclone is to 2 times/day of record of the detection of mine, underflow and effluent concentration, 1 times/day of ore drawing concentration after each draw-point dilution, carefully
1 times/day of degree detection；Increase measurement cyclone when driving and parking or abnormal production to mine, underflow, overflow and ore drawing diluted concentration；Dam
1 time/month of body saturation monitoring record, flood season 1 times/week of monitoring record weekly, 1 time/month of monitoring record after heavy rain；It is clear at overflow well
1 times/day of the monitoring record of water layer；Tailing dam on-line monitoring system, which recalls, reviews 1 times/day of situation of monitoring in first 24 hours.According to row
The tailing amount and pressure put open 3-4 root ore drawing branch pipe, and cyclone pressure guarantees grading effect between 0.12-0.25MPa.Root
Dilution water is adjusted according to ore drawing situation, ore drawing concentration is forbidden not dilute ore drawing less than 35% after dilution, with adjusting ore drawing in time
Point makes tailing uniform deposition, so that plum mountain mountain scene Tailings Dam, which meets four, waits Safety of Tailings Dam technical requirements: the dam beach Qian Gan length >
50m keeps enough reservoir capacity for flood control and clarification distance, adjusts big vast height > 1.5m, clear water layer height > 0.5m at overflow well, cannot
It is big vast highly instead of safe superelevation, safe superelevation > 0.5m with adjusting.
It should be noted that above-described embodiment, is not intended to limit the scope of protection of the present invention, in above-mentioned technical proposal
On the basis of made equivalents or substitution each fall within the range that the claims in the present invention are protected.
Claims (6)
1. a kind of high tailings impoundment of microfine containing mud and technique of building a dam, which is characterized in that the processing step is as follows:
1) efficiently large or fine granule separation is realized in desliming, and microfine sludge is unpowered to clear water zone in being put in storage；
2) dilution, waterpower alluviation disperse ore drawing before cyclowass underflow dam；
3) cyclowass underflow subregion alternating ore drawing is built a dam, and is extended ore drawing and is constructed manually dry beach；
4) stockpiling of microfine high-concentration tailings, which is built a dam, operates monitoring process.
2. the height tailings impoundment of microfine containing mud according to claim 1 and technique of building a dam, which is characterized in that the step 1)
In efficiently desliming realize large or fine granule separation, it is specific as follows, select 12 efficient cyclowass to realize large or fine granules separation, it is de-
Mud hydrocyclone structure parameter: overflow caliber 80mm, sand setting bore 40mm, feed inlet equivalent diameter 78mm, cyclone shell of column are effective
Height 345mm, 20 ° of cyclone cone angle；Cyclowass progressive operation parameter: feed thickness 45%-47%, operating pressure
0.12-0.20MPa, work number of units 3-6 platform；- 200 mesh content of cyclowass overflow is greater than 91% or more, and cyclowass is heavy
- 200 mesh content of sand is lower than 28%；12 cyclowass are evenly arranged before dam, ore drawing is built a dam before the direct dam of sand setting, overflow sludge
Collect and carries out free settling to 150 meters in storage area outer clear water zones.
3. the height tailings impoundment of microfine containing mud according to claim 2 and technique of building a dam, which is characterized in that the sludge overflows
Manifold trunk is flowed to two sides dam abutment direction along slope 1.0%, and sludge overflow delivery pipe is set along two sides library frame side, the direction Shun Po into library
2.0%, fill dam is averaged outer slope ratio 1:5.0, and 30 meters of height of dam.
4. the height tailings impoundment of microfine containing mud according to claim 3 and technique of building a dam, which is characterized in that the step 2)
Dilution, waterpower alluviation disperse ore drawing before middle cyclowass underflow dam, specific as follows, after the concentration of efficient concentration pond, Tailings Slurry
Concentration is increased to 45% or more, and high-concentration ore slurry is sent to the coarse granule obtained before dam through cyclowass through diaphragm pump remote conveying
Underflow density is up to 70-85%, not diluted cyclone underflow coarse granule ore pulp because concentration it is higher caused by poor fluidity, it is anhydrous
Power grading effect, beach face are to squeeze wriggling forward traveling, and the similar protuberance of flow regime, which becomes silted up, to be squeezed, and flow process has no grading effect,
Increase dilution water in underflow sand setting collecting vessel, guarantees that underflow ore drawing concentration is lower than 35%.
5. the height tailings impoundment of microfine containing mud according to claim 4 and technique of building a dam, which is characterized in that the step 3)
Cyclowass underflow subregion alternating ore drawing is built a dam, and extending ore drawing, to construct manually dry beach specific as follows, selects 12 desliming eddy flows
Device, cyclowass are equally spaced on dam crest platform along the axis of dam, using steel bracket integral erection, antenna height
4.0m realizes unpowered conveying, and cyclowass bracket need to be moved as tailing dam gradually rises, 12 before dam rotation
Stream device is divided into left and right two groups, and ore drawing divides arranged on left and right sides alternately on dam, carries out subregion using the interim sub- ridge, from dam before to dam
Interior ore drawing, dam facing tailings are smooth to slope 1% suitable into library.
6. the height tailings impoundment of microfine containing mud according to claim 5 and technique of building a dam, which is characterized in that the step 4)
The stockpiling of microfine high-concentration tailings, which is built a dam, operates that monitoring process is specific as follows, according to the tailing amount and pressure of discharge, opens 3-4 root
Ore drawing branch pipe, cyclone pressure are 0.12-0.25MPa, guarantee that grading effect, cyclone are detected to mine, underflow and effluent concentration
2 times/day of record, 1 times/day of ore drawing concentration, 1 times/day of fineness test after each draw-point dilution；Dam seepage line monitoring record 1
Secondary/moon, flood season 1 times/week of monitoring record weekly, 1 times/day of the monitoring record of clear water layer at overflow well.
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