CN105813986A - Method and apparatus for treating tailings using an ac voltage with a DC offset - Google Patents
Method and apparatus for treating tailings using an ac voltage with a DC offset Download PDFInfo
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- CN105813986A CN105813986A CN201480066416.1A CN201480066416A CN105813986A CN 105813986 A CN105813986 A CN 105813986A CN 201480066416 A CN201480066416 A CN 201480066416A CN 105813986 A CN105813986 A CN 105813986A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
- B01D17/06—Separation of liquids from each other by electricity
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/469—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis
- C02F1/4696—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis electrophoresis
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/10—Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/46—Apparatus for electrochemical processes
- C02F2201/461—Electrolysis apparatus
- C02F2201/46105—Details relating to the electrolytic devices
- C02F2201/4612—Controlling or monitoring
- C02F2201/46125—Electrical variables
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/46—Apparatus for electrochemical processes
- C02F2201/461—Electrolysis apparatus
- C02F2201/46105—Details relating to the electrolytic devices
- C02F2201/4612—Controlling or monitoring
- C02F2201/46125—Electrical variables
- C02F2201/4613—Inversing polarity
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Abstract
There is a method of facilitating the consolidation of fine tailings through the application of an electrical current. The fine tailings include a combination of at least some water and some clay particles. Electrodes are placed into contact with the fine tailings. An AC voltage with a DC offset is applied to the electrodes to separate water from the clay particles and to induce movement of the separated water to a collection area. The separated clay particles can consolidate more readily than unseparated clay particles. In an embodiment, the fine tailings are mixed fine oil sands extraction tailings which include residual hydrocarbons. In an embodiment, the application of an AC voltage with a DC offset across the electrodes includes applying an AC voltage of about 1V/cm and a DC offset of about 1/2V/cm.
Description
Technical field
The present invention relates generally to the wide-range of Environmental capacity.More particularly, the present invention relates to and can be used for alleviating the persistent method and apparatus of certain form of tailing pit, described tailing pit is such as the full refuse from tar or oil sand recovery processes and the similar tailing pit at the water carrying colloid mineral in the mine tailing suspended substance of mining.Such alleviating allows to carry out land reclamation.
Background technology
Oil or Tar sands are the sources of Colophonium, and described Colophonium can be transformed into synthetic crude (syntheticcrude) or synthetic crude (syncrude).At present, a large amount of hydrocarbon is reclaimed by surface mining.For obtaining synthetic crude, first described hydrocarbon must separate with the sand base that wherein it is found.This sand sill includes sand, clay, mud, mineral and other materials.The separation first step most commonly used on the Tar sands of surface exploitation is hot water separating technology, and described hot water separating technology uses hot water to isolate hydrocarbon.But, described separation is not perfect and produces as the water base waste liquid of by-product, and it can include a small amount of hydrocarbon, heavy metal and other waste materials.Oil manufacturer processes their alleged fresh thin mine tailing (FreshFineTailings, FFT) and the thin mine tailing of maturation (MatureFineTailings, MFT) at present；The MFT after allowing sand to settle usual 3 years that is distinguished as between both is derived from FFT.MFT is mainly the stable colloid mixture of water and clay and other materials, and is collected in the on-the-spot liquid storage tank being referred to as tailing pit.
For the reserves of the substantial amounts of oil being present in Canada's alberta, oil extracts and has been carried out for many years.According to estimates, 750,000,000m have been produced3MFT.Some assessments display 550km2Soil disturbed by surface mining, and this area less than 1% is proven regeneration.The production facility of 100,000bbl/ days produces the FFT of 50,000 ton day, this equates about 33,500m3FFT/ days.
There are 3 environment and economic problems in FFT and MFT: the delay of water management, the sterilization of potential productivity Ore and transformation.Although concentration change, MFT/FFT can generally comprise 50-70% water.So high water content is combined formation thixotropic liquid with naturally occurring clay.This liquid is highly stable and lasting and has been collected in substantial amounts of storage pool in the past.Few being treated for processes established MFT and therefore it is continued at increasing storage pool relaying and makes.Accelerate due to the development of Tar sands and increasing production is reached the standard grade, increasing MFT/FFT will be produced.It is desirable that the method processing the MFT/FFT produced and by generation, to allow land reclamation, the water discharging collection and offer to lead to the entrance being positioned at the productivity Ore below such pond.
MFT/FFT represents clay (illite, and mainly kaolinite), water and the mixture of the Colophonium of residual being processed to form by oil-sand.In some cases, MFT also can experience intrinsic biodegradation.Described biodegradation process forms many bubble mixts, has been further exacerbated by consolidating the difficulty of this material.According to estimates, need 40-200 fully to consolidate to allow the transformation of tailing pit for these clays.Such delay will cause the MFT of unacceptable large volume, and in transformation certification it may happen that before time of postponing, unless found a kind of effectively process and the method for transformation.The command request oil-sand maker of energy resources exchange committee (EnergyResourcesConversationBoard) is by their tailings glass to following bearing capacity: was 5kPa before 2012, was 10kPa before 2015.
The electric field applied has been used for making soil water desorption for building engineering to improve bearing capacity.Electrophoresis has been used in multiple industry, for instance pharmaceuticals industry and ceramic industry are to produce high-grade separation.Electrostriction has been used for producing high density ceramic.At Fargo, ND (Smith et al., 2006)aIn resistance heat treated, having been found that electrostriction phenomena in the application in electric field application to reinforced clay, the electric field wherein applied is 0.46-0.8volt/cm.Existing patent below can find the example that electric field is applied in several cases.
U.S. Patent number 3,962,069
U.S. Patent number 4,107,026
U.S. Patent number 4,110,189
U.S. Patent number 4,170,529
U.S. Patent number 4,282,103
U.S. Patent number 4,501,648
U.S. Patent number 4,960,524
U.S. Patent number 5,171,409
U.S. Patent number 6,596,142.
Also have attempted in electric current application to oil sand tailing, as display in United States Patent (USP) 4,501,648.But, this instructs a kind of little device, and it has the mobile immersion electrode with crawler belt, and deposition has clay solid on the electrodes.Mobile described electrode disconnection contacting with liquid and then being scraped off from electrode by solid.Need chemical pretreatment step to reach required sedimentation rate on the electrode immersed.Although interesting, this invention is too little and cannot be used for MFT/FFT and processes practice and need to increase the chemical pretreatment step of cost.
Using electric field can not need effective utilization of energy to process small-scale clay deposition.But, on a large scale, it is necessary to high power consumption or need maybe can not implementing of in long-time electric current application undue costliness owing to available resources is probably of applied current.In remote districts, the access of extensive electric current is probably restricted.When processing MFT and the FFT of thousands of square metres, cost and power demand can be had significant impact by little current drain change.
What is desired is that a kind of process the needing processed MFT/FFT of large volume and without the method for too much power outlay.What is desired is that the utility system for efficiently and quickly processing mine tailing.What be also required to is the method extracting water from the MFT/FFT of large volume, and described MFT/FFT can be reused for other purposes.
Summary of the invention
In one embodiment of the invention, the method with the consolidation being promoted thin mine tailing by applied current.Described thin mine tailing includes the combination of at least some water and some clay particles.At least two electrode is made to contact with thin mine tailing.Having exchange (AC) voltage that direct current (DC) offsets to separate water from clay particle and to induce the water separated to move to collecting zone across described at least two application of electrode, the comparable unsegregated clay particle of clay particle of wherein said separation is easier to consolidation.
In another embodiment of the present invention, have by applied current for consolidating the device of mine tailing in tailing pit.At least two electrode is connected to power supply.When immersing in described mine tailing, supporting construction supports described at least two electrode with the distance being fixed to one another.Dielectric displaceable sleeve is around the non-insulated portion of the insulated part with the electrode that is defined in described sleeve of at least one in described at least two electrode and the electrode outside sleeve.Buoyancy elements floats on described mine tailing.Adapter provides the connection between buoyancy elements and displaceable sleeve, wherein along with the rising adding more mine tailing and mine tailing level, described buoyancy elements make described dielectric displaceable sleeve raise with allows applied current with promotion the consolidation of interpolation mine tailing.
In one embodiment, have by the applied current method for consolidating mine tailing in tailing pit.Thin mine tailing includes the combination of at least some water and some clay particles.At least two electrode is configured to contact with thin mine tailing, and described at least two electrode has the part of uninsulated part and insulation.There is provided the AC voltage with DC skew to induce water to separate with clay particle to described at least two electrode.Offer can transmit the power supply of the AC voltage with DC skew.The mine tailing added is introduced tailing pit.Along with the rising of mine tailing level, increase the area of non-insulated part of described at least two electrode contact with mine tailing with the permission consolidation applying pantostrat to promote mine tailing from the voltage of power supply.
There is the application of AC voltage of DC skew independent AC or DC that compare to reduce required power consumption and promote water and separate.
Accompanying drawing explanation
The reference of the preferred embodiments of the invention is only made by way of example referring now to figure below, wherein:
Fig. 1 is the flow chart of the method processing mine tailing with the AC voltage with DC skew；
Fig. 2 is the side schematic view of the consolidation device for processing mine tailing；
Fig. 3 is the side schematic view of the fine powder distributor for processing mine tailing；
Fig. 4 is the top plan of multirow consolidation device and distributor for processing mine tailing；
Fig. 5 is the side sectional view of the electrode with dielectric bushings；With
Fig. 6 is the side perspective view of the consolidation device for processing mine tailing.
Detailed description of the invention
In this manual, term MFT or MFT/FFT or FFT should represent the mine tailing being present in tailing pit, described tailing pit be by from tar or oil-sand extract hydrocarbon such as Colophonium produce tailing pit, Alumina tailing pit, flyash tailing pit or other formed tailing pit by gel state fluid, described gel state fluid is the combination of at least some water and clay particle.As the skilled person will appreciate, the exact ingredient of MFT/FFT will change, and depend on the composition of the Ore being produced, owing to the localized variation in such Ore.But, as used herein, described term is intended to include to comprise the compositions of water, clay, mud and the hydrocarbon remained in some cases and the material of hydrocarbon by-product inter alia.
nullIn the Canadian Patent 2 being entitled as " ElectrokineticProcessandApparatusforConsolidationofOilSa ndsTailings " that on October 7th, 2012 announces,736,675，In the Canadian Patent 2 being entitled as " ElectrokineticProcessandApparatusforConsolidationofOilSa ndsTailings " that on October 7th, 2012 announces,758,872，In the U.S. Patent Application No. 13/440 being entitled as " ElectrokineticProcessandApparatusforConsolidationofOilSa ndsTailings " that on October 11st, 2012 announces,386，With submit on July 9th, 2012 be entitled as " MethodandApparatusforTreatingTailingsusingAlternatingCur rent " Canadian Patent 2,782,949 (" aforementioned patent applications ") are each via being incorporated herein by reference，These patents describe electric field application to tailing pit and discharge water in the process of using electric field from mine tailing.
This patent document describes the method processing mine tailing, it application including there is the AC voltage of DC skew.The combination of AC and DC can provide multiple advantage.It can provide effective power utilization to realize the separation of water.This system can reversed polarity with reverse plating and corrosion electrode influences.It may result in water and migrates in another direction in a direction migration and granule.This patent document also illustrates and utilizes the exemplary electrode of floating electrode system to configure.
Generally, applying more strong to the electric field of MFT/FFT, active force is more big, it is achieved the time of required compaction degree is more short, or compaction degree in the cards is more big.But, this is likely to and causes higher energy consumption, and this is directly relevant to cost.Further, water balance is important.The electric field applied is more strong, for increase temperature and therefore dry MFT/FFT electromotive force more high.Dry MFT/FFT causes that the loss of circuit processes with electric power therefore.Those skilled in the art it will now be appreciated that be that the present invention can multiple intensity implement, depend on the balance of required cost, time and compaction degree.Design for the transmission system of electric energy and equipment can based on speed required in the processing unit in the tailing pit being modified or outside original place, balance between cost and result.The water chemistry of separated water is also intended to consideration.
Voltage gradient is more high, and electromotive force is more big, and therefore, processes the time more short.But, in the higher gradient of application, there are three negative factors: 1) electric current density of surrounding them increases, and causes " parching (dry-out) " and the loss with the electrical contact holding current-carrying pore water；2) gradient is more high, and electrode spacing is more near, and increases installation cost；With 3) along with the release of water, the resistance of MFT and FFT increases, and makes the timing that higher electric field is applied become important.Need to assess voltage gradient and the quantity of electrode and space based on concrete case with design most economical compared with the timetable determined and process.
In using the process of MFT/FFT of electric field, both alternating current and unidirectional current can be used to implement test.Have been found that and can pass through to use the AC with DC skew to realize advantage, there is the AC of DC skew in this article also referred to as the alternating current of direct current biasing.Having been found that it is less desirable for being used alone DC, because the material that DC may result in processed MFT/FFT parches at surrounding them, this hinders process efficiency, because dry material can stop electrode to work and must remove from electrode at any time.Although the application of alternating current does not produce the problem that electrode parches, water migrates more limited than application unidirectional current.Experiment has shown that the application of the AC with DC skew is compared individually application AC or DC and had advantage.
In some cases, it can be possible to need re-use from mine tailing extract water for other purposes.Process water can recycled back be used in oil-sand produce and bitumen extraction in.Have been found that mine tailing is applied high DC skew can have negative effect to the quality of the water being extracted.Therefore, although higher DC skew can allow more water to be extracted quickly, it may result in higher pH water.When the relatively low pH needed, it is necessary to promote water skew using sufficiently high DC skew and use of a sufficiently low DC skew to keep realizing balance between the quality of water.
Described mine tailing is the combination of at least some water and clay particle.At least some hydrone is weaker combined to form gel state fluid with clay particle, and wherein water is not easy such as to be separated with described gel state fluid by evaporation.
In some embodiments, it is provided that a kind of AC dielectric using direct current biasing swim (DEP) application with realize water separate, fine powder compress and separated from bitumen/recoverys process liquid mine tailing method.Electrode is placed on the region that mine tailing will be occurred finally to deposit.Along with mine tailing is added into processing region, on electrode, applied voltage is poor.Under the existence of DC electric field, the faradic current reaction occurred on electrode forms the difference of pH level between electrode, causes the formation of electric conductivity gradient.This gradient causes the motion towards electrode of fine powder and water in conjunction with electric field.Current direction surface forms water cap.Solid compresses near the electrode exposed.In one embodiment, by using the exposure that floating electrode sleeve assembly controls electrode to contact with the water extracted with restriction.The polarity of electrode is reversed to realize the electrode life of uniform treatment and prolongation with the interval regularly controlled.The amount that can pass through voltage gradient and the DC skew used minimizes the hydrochemical change of restriction.Described process is controlled with water extraction speed to keep consistent electrode expose and make output speed maximize by adding to flow into.
Equation 1 below presents corrects, in electric power, the electrical waveform applied in the material in (EKR) processing procedure by electrode.The catalog of the parameter that the electrical waveform to electrode is applied in definition in EKR processing procedure controls catalog also referred to as reference.
The electric power used in EKR processes is directly proportional to the size of interelectrode electric field.Interelectrode electric field may approximately equal to apply to electrode electrical waveform between difference divided by interelectrode distance.Determine that the geometric configuration that each electrode configures determines described distance.Space between electrodes is set to the configuration of d rice by application on the material between described two electrodes equal to the electric field of equation 2.
In one embodiment, there is the method 100 promoting thin mine tailing to consolidate by applied current, as shown in fig. 1.The thin mine tailing being consolidated includes the combination of at least some water and some clay particles.At 102 places, at least two electrode is made to contact with thin mine tailing.At 104 places, having the AC voltage of DC skew in application on described at least two electrode, so that water to separate with clay particle and to induce the water separated move to collecting zone, the comparable unsegregated clay particle of clay particle of wherein said separation is easier to consolidation.Once water has been separated to collecting zone, described water can be extracted.Described water can be processed along with thin mine tailing and be extracted continuously or be extracted with discrete time.Such as, pump can be connected to collecting zone to remove the water of separation.Described collecting zone can be the region that the wherein water in mine tailing is generally assembled or the individual region such as defined in the sleeve of surrounding electric poles.
What have the DC AC voltage offset is applied in polarization between described at least two electrode.In one embodiment, the polarity of described at least two electrode can periodically be reversed to maintain described electrode.For example, it is possible to the polarity of described electrode is reversed at the interval of 5 minutes, but other interval can also be used.Although reversing the polarity of electrode to stoping granule to be advantageous in the accumulation of negative electrode, the polarity reversing electrode is likely to make water extraction inefficient.
In a preferred embodiment, the DC of the AC voltage and up to 1V/cm that include application up to 4V/cm peak to peak across the AC voltage with DC skew of described at least two electrode in 104 offsets.In a most preferred embodiment, across described at least two application of electrode, there is the DC AC voltage offset and include applying the DC skew of the AC voltage at about 1V/cm peak to peak and about 1/2V/cm.
In a preferred embodiment, in the application of 104 places, there is the DC AC voltage offset and farther include to apply the alternating current of about 10Hz or lower frequency.In a most preferred embodiment, application has the DC AC voltage offset and farther includes to apply the alternating current of about 10Hz frequency.
It is contemplated that method 100 can be applied to oil-sand and extract at least one in mine tailing and flyash mine tailing.In a preferred embodiment, described mine tailing is the thin oil-sand extraction mine tailing of the mixing comprising residual hydrocarbons further.
Describe below and show in figs. 2-5 a kind of device for making the operation of the present invention tell on MFT/FFT.Fig. 2 illustrates for consolidating the consolidation device 106 of mine tailing 146 in tailing pit by applied current.Be there is at least two electrode 116 being connected to power supply 120 (Fig. 6) by the power distribution cable 136 (Fig. 5) in power distribution channels system 124.As shown in FIG. 4, electrode 116 is by including the part of a series of electrodes 116 that the supporting construction of anchor 112 supports, and wherein each in a series of electrodes 116 has the dielectric displaceable sleeve 110 around electrode.The electrode of varying number can be used in said device, as long as having at least two electrode.When immersing described mine tailing 146, described supporting construction, with the form of anchor 112, support electrode 116 with the distance being fixed to one another.Dielectric displaceable sleeve 110 is around the non-insulated part 122 of the electrode 116 insulated part with the electrode that is defined in sleeve 110 and the electrode outside sleeve 110.Buoyancy elements 114 floats on mine tailing 146 at surface 118 place of tailing pit.Adapter 164 is to add the level rising of more mine tailing and mine tailing 146 between buoyancy elements 114 and displaceable sleeve 110, and buoyancy elements 114 makes dielectric displaceable sleeve 110 raise to allow the application of the electric current consolidation to promote mine tailing pantostrat.Electrode anchors 112 is anchored at the bottom of tailing pit and to be fixed to electrode 116 generally vertical with holding electrode and be anchored in mine tailing 146.Before any mine tailing is placed into tailing pit, anchor 112 can be placed on the bottom of described tailing pit.When sleeve 110 is placed on electrode, sleeve 110 has certain rigidity together with adapter 164 and provides extra stability.Along with the consolidation of tailing pit, anchor 112 and the suitable position in tailing pit of the holding electrode both sleeve 110.The solid of attached also provides extra support for electrode.In the embodiment illustrated in fig. 2, power distribution channels system 124 is a part for adapter 164.
Control system 150 as shown in Figure 6 can be connected to consolidation device 106, and described consolidation device is configured to use power supply 120 to provide the AC voltage with DC skew to electrode 116.Described control system 150 determines initial parameter based on user's processing spec book, for instance use equation 1；Described parameter can include shear strength, solids content and output；Initial volume and physical property such as solids content.The measurement of cumulative power and recycle-water and the value of calculating determine process state, and this can be used for the parameter adjusting definition application to special electrodes waveform.As what can be readily appreciated by one skilled in the art, voltage 120 can be configured to provide the AC voltage with DC skew to electrode.
As shown in FIG. 3, having thin mine tailing distributor 108, it includes the buoyancy elements 126 being connected to include the fine powder conveyance conduit 128 of multiple fine powder distribution opening 130.As what preferably show in the diagram, multiple thin mine tailing distributors 108 and consolidation device 106 are placed in tailing pit so that distributing thin mine tailing by distributor 108 while processing mine tailing with consolidation device 106.As shown in FIG. 4, in mine tailing, distributor 108 and consolidation device 106 can be placed with alternate sequence.It will be appreciated by those skilled in the art that the distribution of various configuration and consolidation device are possible.Along with the rising of tailing pit level, sleeve 110 and fine powder conveyance conduit 128 will raise and the non-insulated part 122 of electrode 116 length under sleeve 110 will increase.In embodiment shown in figs. 2-5, the bottom of sleeve 110 is kept and the height of the fine powder distribution approximately the same level of opening 130.
Illustrate in greater detail the element of sleeve 110 in Figure 5.Described sleeve 110 includes electrode pads 132 and separates with thin mine tailing with the inside of seal sleeve.Power distribution cable 136 is connected to provide the electric contact piece (electricalcontacttabs) 134 of electric current to electrode bar 116.
In operation, consolidation device 106 is placed and contacts with thin mine tailing.There is provided the AC voltage with DC skew to induce water to separate with the clay particle in mine tailing to electrode 116.Use fine powder conveyance conduit 128 that the mine tailing added is introduced tailing pit.The non-insulated part 122 of electrode 116 and insulated part change along with the rising of mine tailing level, to allow the application consolidation to promote mine tailing pantostrat of electric current.Buoyancy elements 114 floats over the height identical with the top of mine tailing 146, as long as and the mine tailing added be introduced into, buoyancy elements 114 raises and sleeve 110 raises with it, along with sleeve raises the non-insulated part of electrode 116 exposing more sleeve 110 bottom part down.
In one embodiment, along with mine tailing is processed, the water of separation removes from mine tailing.Along with water separates from mine tailing, it is assembled by the near surface at mine tailing and clay particle will sink to bottom.The bottom keeping sleeve the following is useful by the bottom in the fixed region of the hydrosphere at tailing pit collected overhead, can reduce the effectiveness of described process technique because being exposed by electrode to the water separated.
The following describes and show in figure 6 the another kind of consolidation device 168 for making the operation of the present invention tell on MFT/FFT.Outer electrode 140 and central electrode 142 support each via supporting construction 158 and immerse in thin mine tailing 146.In this embodiment, electrode 140 is anode and electrode 142 is negative electrode.Porous sleeve or fiber glass coating (sock) 144 around negative electrode 142 and use the pipe 152 that water apparatus for removing is such as connected to pump (not shown) to be removed from negative electrode by water.Control system 150 provides the alternating current of direct current biasing by distribution cable 148 to electrode 140,142.As shown in FIG. 6, along with the alternating current of direct current biasing is used between anode 140 and negative electrode 142, clay particle is assembled as by shown in Solid build ups 156 around anode, and water is generally assembled around negative electrode, generally illustrates as 160.Thin mine tailing 146 is present in processing region 154, described processing region can be original position or at tailings glass facility place.
Embodiment 1
Having illustrated the electric field with parameter combination in table 1, it is found to be in state modulator table effective embodiment, its production maximization making water compacting makes power consumption minimize simultaneously.Having in the experimentation of the volume of initial 20 liters of MFT and the MFT of 38% solid at 72 hours laboratory treatments, these parameters produce 7.5 liters of water and use 13.1kWh power.
The table 1 actual parameter for processing
| Parameter | Symbol | Value | Unit |
| Waveform | <W> | Sin | |
| DC offsets | A | 6 | VDC |
| AC voltage (peak to peak) | B | 12 | VAC |
| Frequency | f | 10 | Hz |
| Phase deviation | φ | 0 | Degree |
| Electrode spacing | d | 12 | cm |
It will be appreciated by those skilled in the art that different configuration of control system can be used for applying to mine tailing the AC voltage with DC skew.
Can change over frequency and over time to guarantee that electrode is not overheated by the application of the AC voltage with DC skew of electrode.Not every electrode needs to run simultaneously, and can at different time active electrodes pair.Different electrode configurations and described electrode can be used can to run the time of different length.Such as, described electrode can every five minutes which be anode and which be between negative electrode alternately.If having electrode network, for instance, can the electrode of every 20 minutes switchover operations.The corrosion accumulation and the plating that are reduced mineral in the alternating current process of direct current offset by alternately negative electrode and anode can be had in application.
The present invention is it is also understood that the section of tailing pit/processing unit optionally can be processed according to the requirement of local demand.In the first example, tailing pit tend to area big and contribute to processing, the present invention is contemplated by sheet pile etc. or forms less processing region by forming pressure drag parting around processing region.This can be used for the region in described pond is divided into less region or unit process with promotion.In some cases, described sheet pile also is used as electrode.
In one embodiment, it is also desirable to process mine tailing and make power expenditure less than 30/ dry ton, 50% or water that better solid reclaims and wherein separates be suitable for bitumen extraction.
Although being described about before the preferred embodiment of the invention, skilled person will appreciate that multiple changing and modifications is the possible scope widely without departing from claims.Some of these changes has come into question herein above and other will be apparent to those skilled in the art.
In the claims, word " comprising " uses with its meaning comprised and does not exclude the presence of other elements.Indefinite article " one/mono-(a/an) " before claim feature is not excluded for the existence of more than one feature, unless clearly illustrated that from linguistic context being intended to is only single-element.
Claims (16)
1. the method being promoted the consolidation of thin mine tailing by applied current, described thin mine tailing includes the combination of at least some water and some clay particles, and described method comprises:
At least two electrode is made to contact with thin mine tailing；With
Having the alternating voltage of direct current offset to separate water from clay particle and to induce the water separated to move to collecting zone across described at least two application of electrode, the comparable unsegregated clay particle of clay particle of wherein said separation is easier to consolidation.
2. method according to claim 1, wherein application has the alternating voltage of direct current offset and comprises application and have the sinusoidal voltage of direct current offset.
3. method according to claim 1 and 2, comprises the step extracting the water separated from the collecting zone in thin mine tailing further.
4. method according to claim 1 and 2, wherein have direct current offset alternating voltage be applied in polarization between described at least two electrode, and described method comprise further can the polarity of at least two electrode described in periodically reversed to maintain the step of described electrode.
5. method according to claim 1 and 2, wherein has the alternating voltage of direct current offset across described at least two application of electrode and comprises the alternating voltage at application up to 4V/cm peak to peak and the direct current offset of up to 1V/cm further.
6. method according to claim 5, wherein comprises the direct current offset of alternating voltage and the about 1/2V/cm applying about 1V/cm peak to peak further across the alternating voltage with direct current offset of described at least two electrode.
7. method according to claim 1 and 2, wherein said mine tailing is at least one that oil-sand extracts in mine tailing and flyash mine tailing.
8. method according to claim 1 and 2, the thin oil-sand that wherein said mine tailing is the mixing farther including residual hydrocarbons extracts mine tailing.
9. method according to claim 8, wherein application alternating current comprises the alternating current applying about 10Hz or lower frequency further.
10. method according to claim 9, wherein application alternating current comprises the alternating current applying about 10Hz frequency further.
11. by applied current for consolidating a device for mine tailing in tailing pit, it comprises:
The electrode that at least two is powered；
Supporting construction, it supports described at least two electrode when electrode immerses described mine tailing with the distance being fixed to one another；
Dielectric displaceable sleeve, it is around the non-insulated part of the insulated part with the electrode that is defined in sleeve of at least one in described at least two electrode and the electrode outside sleeve；
Buoyancy elements, it floats on described mine tailing；With
Adapter, it is between buoyancy elements and displaceable sleeve, wherein along with the rising adding more mine tailing and mine tailing level, described buoyancy elements make described dielectric displaceable sleeve raise with allows applied current with promotion the consolidation of interpolation mine tailing.
12. device according to claim 11, further contained in the electrode anchors of each bottom of described at least two electrode.
13. device according to claim 11, wherein said at least two electrode package is containing a series of electrodes supported by supporting construction, and wherein each in a series of electrodes has the dielectric displaceable sleeve around described electrode.
14. device according to claim 11, comprise the control system being configured to provide the alternating voltage with direct current offset to described at least two electrode further.
15. the method being used for by applied current consolidating mine tailing in tailing pit, described mine tailing includes the combination of at least some water and some clay particles, and described method comprises:
Placing at least two electrode to contact with thin mine tailing, described at least two electrode has the part of uninsulated part and insulation；
There is provided the alternating voltage with direct current offset to induce water to separate with clay particle to described at least two electrode；
The mine tailing added is introduced tailing pit；
Along with the rising of mine tailing level, increase the described at least two electrode contacted with mine tailing non-insulated part area with allow applied current with promotion the consolidation of interpolation mine tailing.
16. method according to claim 15, comprise further and along with mine tailing is processed, the water of separation is removed from mine tailing.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US14/047,730 US9428408B2 (en) | 2013-10-07 | 2013-10-07 | Method and apparatus for treating tailings using an AC voltage with a DC offset |
| US14/047,730 | 2013-10-07 | ||
| CA2829566A CA2829566C (en) | 2013-10-07 | 2013-10-07 | Method and apparatus for treating tailings using an ac voltage with a dc offset |
| CA2829566 | 2013-10-07 | ||
| PCT/CA2014/000728 WO2015051444A1 (en) | 2013-10-07 | 2014-10-06 | Method and apparatus for treating tailings using an ac voltage with a dc offset |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105813986A true CN105813986A (en) | 2016-07-27 |
Family
ID=52812388
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201480066416.1A Pending CN105813986A (en) | 2013-10-07 | 2014-10-06 | Method and apparatus for treating tailings using an ac voltage with a DC offset |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3055254A4 (en) |
| CN (1) | CN105813986A (en) |
| AU (1) | AU2014334447A1 (en) |
| WO (1) | WO2015051444A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019037794A1 (en) * | 2018-02-05 | 2019-02-28 | 中国矿业大学 | System for controlling goaf filling body heavy metal element migration by means of electrophoresis principles |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA3147378A1 (en) * | 2022-02-01 | 2023-08-01 | Electro-Kinetic Solutions Inc. | An electrokinetic method and system for dewatering soft soils, slurries, colloidal suspensions and other deposits |
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2014
- 2014-10-06 CN CN201480066416.1A patent/CN105813986A/en active Pending
- 2014-10-06 EP EP14852686.6A patent/EP3055254A4/en not_active Withdrawn
- 2014-10-06 AU AU2014334447A patent/AU2014334447A1/en not_active Abandoned
- 2014-10-06 WO PCT/CA2014/000728 patent/WO2015051444A1/en active Application Filing
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US3767046A (en) * | 1970-12-07 | 1973-10-23 | K Hartkorn | Liquid purification method |
| NZ202697A (en) * | 1981-12-11 | 1986-02-21 | Pechiney Aluminium | Floating cathode element for electrolytic production of aluminium |
| DE3824289A1 (en) * | 1988-05-27 | 1989-11-30 | Battelle Institut E V | METHOD AND DEVICE FOR CONDITIONING HEAVY DRAINAGE SLUDGE |
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| WO2019037794A1 (en) * | 2018-02-05 | 2019-02-28 | 中国矿业大学 | System for controlling goaf filling body heavy metal element migration by means of electrophoresis principles |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2014334447A1 (en) | 2016-05-19 |
| WO2015051444A1 (en) | 2015-04-16 |
| EP3055254A4 (en) | 2017-10-11 |
| EP3055254A1 (en) | 2016-08-17 |
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