EP3055254A1 - Méthode et appareil de traitement de résidus en utilisant une tension ca avec un décalage en cc - Google Patents

Méthode et appareil de traitement de résidus en utilisant une tension ca avec un décalage en cc

Info

Publication number
EP3055254A1
EP3055254A1 EP14852686.6A EP14852686A EP3055254A1 EP 3055254 A1 EP3055254 A1 EP 3055254A1 EP 14852686 A EP14852686 A EP 14852686A EP 3055254 A1 EP3055254 A1 EP 3055254A1
Authority
EP
European Patent Office
Prior art keywords
tailings
electrodes
offset
voltage
water
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP14852686.6A
Other languages
German (de)
English (en)
Other versions
EP3055254A4 (fr
Inventor
Bruce S. Beattie
Paul Garcia
Doug Kimzey
Ben Harris
Robert C. Parrott
James Micak
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Electro-Kinetic Solutions Inc
Original Assignee
Electro-Kinetic Solutions Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US14/047,730 external-priority patent/US9428408B2/en
Priority claimed from CA2829566A external-priority patent/CA2829566C/fr
Application filed by Electro-Kinetic Solutions Inc filed Critical Electro-Kinetic Solutions Inc
Publication of EP3055254A1 publication Critical patent/EP3055254A1/fr
Publication of EP3055254A4 publication Critical patent/EP3055254A4/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • 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
    • 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
    • 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

Definitions

  • TITLE METHOD AND APPARATUS FOR TREATING TAILINGS USING AN AC VOLTAGE WITH A DC OFFSET
  • This invention relates generally to the broad field of pollution control. More particularly, this invention relates to methods and apparatus that can be used to mitigate the persistent nature of certain types of tailings ponds, such as tailings ponds filled with waste products from tar or oil sand recovery processes and similar water bearing colloidal minerals in tailings suspensions from mining operations. Such mitigation allows land reclamation to occur.
  • Oil or tar sands are a source of bitumen, which can be reformed into a synthetic crude or syncrude.
  • a large amount of hydrocarbon is recovered through surface mining.
  • This sand based material includes sands, clays, silts, minerals and other materials.
  • the most common separation first step used on surface mined tar sands is the hot water separation process which uses hot water to separate out the hydrocarbons.
  • the separation is not perfect and a water based waste liquid is produced as a by-product which may include small amounts of hydrocarbon, heavy metals, and other waste materials.
  • FFT Fresh Fine Tailings
  • MFT Mature Fine Tailings
  • Oil extraction has been carried out for many years on the vast reserves of oil that exists in Alberta, Canada. It is estimated that 750,000,000 m 3 of MFT have been produced. Some estimates show that 550 km 2 of land has been disturbed by surface mining yet less than 1% of this area has been certified as reclaimed. A 100,000 bbl/day production facility produces 50,000 tonnes per day of FFT, which is equivalent to approximately 33,500 m 3 of FFT per day.
  • MFT/FFT can typically comprise 50 to 70% water. This high water content forms, in combination with the naturally occurring clays, a thixotropic liquid. This liquid is quite stable and persistent and has been historically collected in large holding ponds. Very little has been done to treat the MFT that has been created and so it continues to build up in ever larger holding ponds. As development of the tar sands accelerates and more and more production is brought on line, more and more MFT/FFT will be produced. What is desired is a way to deal with the MFT/FFT that has been and will be generated to permit land reclamation, release of captured water and provide access to the productive ore located beneath such ponds.
  • MFT/FFT represents a mixture of clays (illite, and mainly kaolinite), water and residual bitumen resulting from the processing of oil sands.
  • MFT may also be undergoing intrinsic biodegradation.
  • the biodegradation process creates a frothy mixture, further compounding the difficulty in consolidating this material. It is estimated that between 40 and 200 years are required for these clays to sufficiently consolidate to allow for reclamation of tailings ponds. Such delays will result in unacceptably large volumes of MFT, and protracted periods of time before reclamation certification can take place unless a way to effect disposal and reclamation is found.
  • the oil sands producers are required by a directive of the Energy Resources Conversation Board to treat their tailings to a bearing capacity of 5 kPa by 2012 and 10 kPa by 2015.
  • Electrophoresis has been used in many industries, such as the pharmaceutical industry and ceramics industry to produce high grade separations. Electrostriction has been used to create high density ceramics.
  • electrical resistance heating treatment at Fargo, ND (Smith et al., 2006) a electrostrictive phenomenon has been observed in the application of an electric field to already consolidated clays where the applied electric field ranged between 0.46 to 0.8 volt/cm. Examples of applications of electrical fields in various circumstances can be found in the following prior patents.
  • What is desired is a way to deal with vast volumes of MFT/FFT that will need to be treated without excessive power expenditures. What is desired is a practical system for dealing with tailings efficiently and quickly. What is also desired is a way to extract water from large volumes of MFT/FFT which can be re-used for other purposes.
  • the fine tailings include a combination of at least some water and some clay particles. At least two electrodes are caused to come into contact with the fine tailings. An alternating current (AC) voltage with a direct current (DC) offset is applied across the at least two electrodes to separate water from the clay particles and to induce movement of the separated water to a collection area wherein said separated clay particles can consolidate more readily than unseparated clay particles.
  • AC alternating current
  • DC direct current
  • an apparatus for consolidating tailings at a tailings pond through the application of an electrical current At least two electrodes are connected to a power supply.
  • a support structure supports the at least two electrodes at a fixed distance from each other when immersed in said tailings.
  • a dielectric moveable sleeve surrounds at least one of the at least two electrodes to define an insulated section of the electrode within the sleeve and an uninsulated section of the electrode beyond the sleeve.
  • a buoyant member floats on said tailings.
  • a connector provides a
  • the buoyant member raises the dielectric moveable sleeve to permit the application of the electrical current to facilitate consolidation of the added tailings.
  • the fine tailings include a combination of at least some water and some clay particles. At least two electrodes are placed into contact with the fine tailings, the at least two electrodes having an uninsulated section and an insulated section. An AC voltage with a DC offset is provided to the at least two electrodes to induce separation of the water from the clay particles. A power supply is provided which is capable of delivering the AC voltage with the DC offset. Added tailings are introduced to the tailings pond. The area of the uninsulated sections of the at least two electrodes which are in contact with the tailings are increased as the level of tailings rises to permit the application of the electrical voltages from the power supply to facilitate consolidation of successive layers of the tailings.
  • the application of the AC voltage with a DC offset may reduce the power consumption required and improve the water separation as compared with either AC or DC alone.
  • Figure 1 is a flow diagram of a method of treating tailings with an AC voltage with a DC offset
  • Figure 2 is a side schematic view of a consolidation apparatus for treating tailings
  • Figure 3 is a side schematic view of a fines distribution apparatus for treating tailings
  • Figure 4 is a top plan view of rows of consolidation apparatuses and distribution apparatuses for treating tailings
  • Figure 5 is a side cutaway view of an electrode having a dielectric sleeve
  • Figure 6 is a side perspective view of a consolidation apparatus for treating tailings.
  • MFT MFT/FFT or FFT shall mean the tailings that exist in tailings ponds that arise from the extraction of hydrocarbons, such as bitumen, from tar or oil sands, bauxite tailings ponds, fly ash tailings ponds, or other tailings ponds that are formed of a gel-like fluid which is a combination of at least some water and clay particles.
  • hydrocarbons such as bitumen
  • hydrocarbons such as bitumen
  • the present patent document describes a method of treating tailings which includes the application of an AC voltage with a DC offset.
  • the combination of AC and DC may provide a number of advantages. It may provide for the efficient use of power to achieve separation of the water.
  • the system may be able to reverse polarity to reverse electrode effects of plating and erosion. It may cause water to migrate in one direction and particles in another direction.
  • the present patent document also describes an exemplary electrode configuration which utilizes a floating electrode system.
  • the greater the applied electric field to the MFT/FFT the greater the applied force, the shorter the time period to achieve the desired degree of compaction, or the greater the degree of compaction that can be achieved.
  • this may also result in the greater the amount of energy consumed, relating directly to cost. Further, water balance is important.
  • the voltage gradients and number and spacing of electrodes need to be evaluated on a case-by-case basis to determine the most economical design compared against the timeframe for treatment.
  • water extracted from tailings may be recycled back for use in oil sands production and bitumen extraction.
  • treated water may be recycled back for use in oil sands production and bitumen extraction.
  • the tailings are a combination of at least some water and clay particles. At least some water molecules are weakly bonded to the clay particles to form a gel-like fluid from which water does not readily separate, such as through evaporation.
  • Electrodes are placed into the area that final deposition of the tailings will occur.
  • a voltage difference is applied to the electrodes as tailings are added to the treatment area.
  • Faradaic reactions that occur at the electrodes in the presence of a DC electric field create a difference in pH levels between the electrodes resulting in the formation of a conductivity gradient. This gradient combines with the electric field to result in the movement of fines and water toward the electrodes. Water flows to the surface forming a water cap. Solids compact near the exposed electrodes.
  • electrode exposure is controlled to limit contact with the extracted water through the use of a floating electrode sleeve assembly.
  • the polarity of the electrodes may be reversed at regular controlled intervals to achieve uniform treatment and extend electrode life. Changes to water chemistry can be limited by minimizing the voltage gradient and the amount of DC offset used.
  • the process is controlled by regulating the inflow and water extraction rates to maintain consistent electrode exposure and maximize throughput rate.
  • the electrical waveform applied by an electrode in material during electrokinetic remediation (EKR) Treatment is represented by equation 1 , below.
  • the schedule of parameters that define the electrical waveforms applied to electrodes during EKR Treatment is referred to as a parameter control schedule.
  • V e (t) Y ⁇ u(t - t ⁇ f .) - U(t - t rai .)] ⁇ ⁇ A, + B, ⁇ ⁇ » ⁇ )(2«/ ⁇ ⁇ £ + # ⁇ ) ⁇
  • V e (t) is the piecewise waveform applied to a specific electrode
  • Ai is the DC offset in effect between t start i and t eorialdi
  • ⁇ Wj> is the waveform (i.e., sin, square, etc.) in effect between
  • ⁇ is the phase offset in effect between t sta rti and t m di
  • Electrokinetic forces used in EKR Treatment are directly proportional to the magnitude of the electric field between electrodes.
  • the electric field between electrodes may be approximated by the difference between the electrical waveforms applied to the electrodes divided by the distance between the electrodes.
  • the geometrical configuration that determines the placement of each electrode determines the distance.
  • a configuration that sets the spacing between two electrodes to d metres will apply an electrical field to the material between the two electrodes approximately equal to equation 2.
  • Vi (t) is the electrical waveform applied to electrode 1 V per
  • V 2 (t) is the electrical waveform applied to electrode 2 metre
  • d is the distance between electrodes 1 and 2 in metres.
  • the fine tailings being consolidated include a combination of at least some water and some clay particles.
  • At 102 at least two electrodes are caused to come into contact with the fine tailings.
  • At 104 an AC voltage with a DC offset is applied across the at least two electrodes to separate water from the clay particles and to induce movement of the separated water to a collection area wherein said separated clay particles can consolidate more readily than unseparated clay particles. Once the water has been separated into the collection area, the water may be extracted.
  • the water may be extracted continuously as the fine tailings are treated or at discrete times.
  • a pump may be connected to the collection area to remove separated water.
  • the collection area may be an area within the tailings where water generally collects or a separate area such as defined within a sleeve surrounding the electrodes.
  • the application of an AC voltage with a DC offset creates a polarity between the at least two electrodes.
  • the polarity of the at least two electrodes may be periodically reversed to preserve the electrodes.
  • the polarity of the electrodes may be reversed at intervals of 5 minutes, although other time intervals may also be used.
  • reversing the polarity of the electrodes may be advantageous to prevent particle build-up at the cathodes, reversing the polarity of the electrodes may make water extraction less efficient.
  • an AC voltage with a DC offset across the at least two electrodes in 104 includes applying an AC voltage of up to 4 V/cm peak-to-peak and a DC offset of up to 1 V/cm.
  • applying an AC voltage with a DC offset across the at least two electrodes comprises applying an AC voltage of about 1 V/cm peak- to-peak and a DC offset of about 1 ⁇ 2 V/cm.
  • applying an AC voltage with a DC offset at 104 further comprises applying alternating current at a frequency of about 10 Hz or less. In a most preferred embodiment, applying an AC voltage with a DC offset further comprises applying alternating current at a frequency of about 10 Hz.
  • the method 100 can be applied to at least one of oil sands extraction tailings and fly ash tailings.
  • the tailings are mixed fine oil sands extraction tailings which further include residual hydrocarbons.
  • FIG. 2 shows a consolidation apparatus 106 for consolidating tailings 146 at a tailings pond through the application of an electrical current.
  • the electrodes 116 are part of an array of electrodes 116 which are supported by a support structure, including anchors 112, and in which each of the array of electrodes 116 has a dielectric moveable sleeve 110 surrounding the electrode.
  • the support structure in the form of anchors 112, supports the electrodes 116 at a fixed distance from each other when immersed in said tailings 146.
  • a dielectric moveable sleeve 110 surrounds the electrodes 116 to define an insulated section of the electrode within the sleeve 10 and an uninsulated section 122 of the electrode beyond the sleeve 110.
  • a buoyant member 114 floats on the tailings 146 at the surface 118 of the tailings pond.
  • a connector 164 lies between the buoyant member 1 14 and the moveable sleeve 1 10 so that as more tailings are added and the level of tailings 146 rise, the buoyant member 1 14 raises the dielectric moveable sleeve 1 10 to permit the application of the electrical current to facilitate consolidation of successive layers of the tailings.
  • Electrode anchors 1 12 are anchored to the base of the tailings pond and are secured to the electrodes 1 16 to keep the electrodes generally vertical and anchored within the tailings 146.
  • the anchors 112 may be placed on the bottom of the tailings pond before any tailings are placed into the tailings pond.
  • the sleeves 1 10 When the sleeves 1 10 are placed over the electrodes, the sleeves 1 10 together with the connectors 164 have some rigidity and provide additional stability. As the tailings pond consolidates, both the anchors 1 12 and the sleeves 1 10 hold the electrodes in place in the tailings pond. The consolidated solids also provide additional support for the electrodes. In the embodiment shown in Fig. 2, the power distribution routing system 124 is part of the connector 164.
  • a control system 150 such as is shown in Fig. 6 may be connected to the consolidation apparatus 106 which is configured to provide an AC voltage with a DC offset to the electrodes 116 using a power supply 120.
  • the control system 150 determines the initial parameters, for example, using equation 1 , for each electrode based on a user's treatment specification; which may include shear strength, solids content, and throughput; the initial volume and physical properties such as solids content. Measured and calculated values of cumulative power and water recovered determine the treatment status may be used to modify the parameters that define the waveforms applied to specific electrodes.
  • the power supply 120 may be configured to provide an AC voltage with a DC offset to the electrodes. As shown in Fig.
  • fine tailings distribution apparatus 108 which includes buoyant member 126 which is connected to a fine delivery piping 128 which includes a number of fine distribution openings 130.
  • multiple fine tailings distribution apparatuses 108 and consolidation apparatuses 106 are placed in the tailings pond so that fine tailings may be distributed by the distribution apparatus 108 at the same time that the consolidation apparatus 106 treats the tailings.
  • the rows of distribution apparatuses 108 and consolidation apparatuses 106 may be placed in alternating sequence within the tailings. It would be understood by a person skilled in the art that different configurations of the distribution and consolidation apparatuses are possible.
  • both the sleeves 110 and the fine delivery piping 128 will rise and the uninsulated section 122 of the electrodes 116 will increase in length below the sleeve 110.
  • the base of the sleeve 110 is maintained at a height at approximately the same level as the fine distribution openings 130.
  • the components of the sleeve 110 are shown in more detail in Fig. 5.
  • the sleeve 1 10 includes electrode gaskets 132 to seal the interior of the sleeve from the fine tailings.
  • the power distribution cables 136 connect to electrical contact tabs 134 which provide the current to the electrode rod 116.
  • the consolidation apparatus 106 is placed into contact with the fine tailings.
  • An AC voltage with a DC offset is provided to the electrodes 116 to induce separation of the water from the clay particles within the tailings.
  • Added tailings are introduced into the tailings pond using the fines delivery piping 128.
  • the location of the uninsulated section 122 and the insulated sections of the electrodes 1 6 are varied as the level of tailings rise to permit the application of the electrical current to facilitate consolidation of successive layers of the tailings.
  • the buoyant member 114 floats at the same height as the top of the tailings 146 and so as added tailings are introduced, the buoyant member 114 rises and the sleeve 110 rises with it, exposing more of the uninsulated section 122 of the electrodes 116 below the base of the sleeve 10 as the sleeve rises.
  • separated water is removed from the tailings as the tailings are treated. As the water is separated from the tailings it will collect close to the surface of the tailings and the clay particles will settle to the bottom. It is beneficial to keep the base of the sleeves below the bottom of the area defined by the collected water at the top of the tailings pond since exposing the electrodes to separated water may reduce the effectiveness of the treatment process.
  • Exterior electrodes 140 and central electrode 142 are each supported by a support structure 158 and submerged in fine tailings 146.
  • the electrodes 140 are anodes and electrode 142 is a cathode.
  • a perforated sleeve or fiberglass sock 144 surrounds the cathode 142 and water is removed from the cathode using a water removal device such as tubing 152 connected to a pump (not shown).
  • a control system 150 provides direct current biased alternating current through distribution cables 148 to the electrodes 140, 142. As shown in Fig.
  • Example 6 as the direct current biased alternating current is applied between the anodes 140 and the cathode 142, clay particles collect around the anodes as shown by the build-up of solids 156 and water collects generally around the cathode as shown generally at 160.
  • the fine tailings 146 lie in a treatment area 54 which may be either in situ or at a tailings treatment facility.
  • the application of an AC voltage with a DC offset through the electrodes can be varied in frequency and time to ensure that the electrodes do not overheat. Not all the electrodes need to be on at the same time, and pairs of electrodes can be activated at different times.
  • Various arrangements of electrodes may be used and the electrodes can be turned on for various lengths of time. For example, the electrodes may alternate between which is the anode and which is the cathode every five minutes. If there are a network of electrodes, the electrodes which are on can be switched every 20 minutes, for example. Corrosion buildup and plating of minerals can be reduced by alternating the cathodes and anodes during application of the alternating current with direct current offset.
  • the present invention also comprehends being able to selectively treat sections of the tailings pond/treatment cell as local requirements demand.
  • the tailings ponds tend to be vast in area and to facilitate the treatment the present invention contemplates creating smaller treatment areas by means of sheet piling or the like, or by creating pressure barriers around the treatment area. This can be used to divide the area of the pond up into smaller areas or cells to facilitate treatment.
  • the sheet pile may also be used as an electrode in some cases.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Molecular Biology (AREA)
  • Health & Medical Sciences (AREA)
  • Electrochemistry (AREA)
  • Thermal Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • General Chemical & Material Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)

Abstract

L'invention concerne une méthode de facilitation de la consolidation de résidus fins par l'application d'un courant électrique. Les résidus fins comprennent une combinaison d'au moins une certaine quantité d'eau et d'une certaine quantité de particules d'argile. Des électrodes sont placées en contact avec les résidus fins. Une tension CA avec un décalage en CC est appliquée aux électrodes pour séparer l'eau des particules d'argile et pour induire le mouvement de l'eau séparée vers une zone de collecte. Les particules d'argile séparées peuvent se consolider plus aisément que des particules d'argile non séparées. Dans un mode de réalisation, les résidus fins mélangés sont des résidus d'extraction de sables bitumineux fins qui comprennent des hydrocarbures résiduels. Dans un mode de réalisation, l'application d'une tension CA avec un décalage en CC entre les électrodes consiste à appliquer une tension CA d'environ 1 V/cm et un décalage en CC d'environ ½ V/cm.
EP14852686.6A 2013-10-07 2014-10-06 Méthode et appareil de traitement de résidus en utilisant une tension ca avec un décalage en cc Withdrawn EP3055254A4 (fr)

Applications Claiming Priority (3)

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
CA2829566A CA2829566C (fr) 2013-10-07 2013-10-07 Procede et appareil pour traiter des residus au moyen d'une tension ca avec un decalage cc
PCT/CA2014/000728 WO2015051444A1 (fr) 2013-10-07 2014-10-06 Méthode et appareil de traitement de résidus en utilisant une tension ca avec un décalage en cc

Publications (2)

Publication Number Publication Date
EP3055254A1 true EP3055254A1 (fr) 2016-08-17
EP3055254A4 EP3055254A4 (fr) 2017-10-11

Family

ID=52812388

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14852686.6A Withdrawn EP3055254A4 (fr) 2013-10-07 2014-10-06 Méthode et appareil de traitement de résidus en utilisant une tension ca avec un décalage en cc

Country Status (4)

Country Link
EP (1) EP3055254A4 (fr)
CN (1) CN105813986A (fr)
AU (1) AU2014334447A1 (fr)
WO (1) WO2015051444A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108128856B (zh) * 2018-02-05 2019-06-04 中国矿业大学 利用电泳原理控制采空区充填体重金属元素迁移的系统
CA3147378A1 (fr) * 2022-02-01 2023-08-01 Electro-Kinetic Solutions Inc. Methode et systeme electrokinetiques pour la deshydratation des sols mous, des boues, des suspensions colloidales et d'autres depots

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT310100B (de) * 1970-12-07 1973-09-10 Hartkorn Karl Heinz Verfahren zur Reinigung von wässerigen Flüssigkeiten, die mit störenden Stoffen belastet sind
FR2518124A1 (fr) * 1981-12-11 1983-06-17 Pechiney Aluminium Elements cathodiques flottants, a base de refractaire electroconducteur, pour la production d'aluminium par electrolyse
DE3824289A1 (de) * 1988-05-27 1989-11-30 Battelle Institut E V Verfahren und vorrichtung zur konditionierung schwer entwaesserbarer schlaemme
CN1888023A (zh) * 2006-07-17 2007-01-03 威海海和科技有限责任公司 一种原油电场脱水脱盐的方法及其装置
CA2736675C (fr) * 2011-04-07 2014-08-12 Dpra Canada Incorporated Appareillage et procede electrocinetique de densification de residus de sables bitumineux
CA2758872A1 (fr) * 2011-04-07 2012-10-07 Dpra Canada Incorporated Appareillage et procede electrocinetique de densification de residus de sables bitumineux
CA2741020C (fr) * 2011-05-17 2012-02-14 James S. Adamson Clarification des etangs de residus grace a l'utilisation de l'electrophorese
JP2013013881A (ja) * 2011-06-30 2013-01-24 Yoshiaki Shirakata 真空電気泳動高周波脱水処理装置。
CN103194597B (zh) * 2013-04-20 2015-06-03 北京科技大学 一种电场强化细粒尾矿原地浸出的方法

Also Published As

Publication number Publication date
WO2015051444A1 (fr) 2015-04-16
AU2014334447A1 (en) 2016-05-19
CN105813986A (zh) 2016-07-27
EP3055254A4 (fr) 2017-10-11

Similar Documents

Publication Publication Date Title
US9896356B2 (en) Electrokinetic process for consolidation of oil sands tailings
CA2741020C (fr) Clarification des etangs de residus grace a l'utilisation de l'electrophorese
US20140008229A1 (en) Method And Apparatus For Treating Tailings Using Alternating Current
US11639640B2 (en) Electro-separation cell with solids removal
CA2736675C (fr) Appareillage et procede electrocinetique de densification de residus de sables bitumineux
CA2891390C (fr) Deshydratation electrocinetique capacitive de suspensions et de salissures
EP3055254A1 (fr) Méthode et appareil de traitement de résidus en utilisant une tension ca avec un décalage en cc
US9428408B2 (en) Method and apparatus for treating tailings using an AC voltage with a DC offset
CA2668784C (fr) Methode et appareillage d'extraction electrocinetique de petrole lourd
CA2829566C (fr) Procede et appareil pour traiter des residus au moyen d'une tension ca avec un decalage cc
US20150283510A1 (en) Dewatering of oil sands tailings using in situ electro-osmosis
Al-Rubaiey et al. Electrocoagulation treatment of oil-based mud wastewater
US20190015785A1 (en) Capacitative electrokinetic dewatering of suspensions
Shang et al. Applications of electrokinetics in tailing treatment
Fourie Enhanced dewatering of fine tailings using electrokinetics
US20180229153A1 (en) Method Of Electrotreating Tailings To Create Geotechnical Structures
WO2020060526A1 (fr) Déshydratation électrocinétique capacitive de suspensions
Kong Continuous electrokinetic dewatering of phosphatic clay suspensions
CA2644793A1 (fr) Electrophorese des boues de residus au moyen d'enroulements de cable san fin
WO1987001057A1 (fr) Structures de drain a electrodes pour deshydratation de suspensions

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20160429

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

RIN1 Information on inventor provided before grant (corrected)

Inventor name: HARRIS, BEN

Inventor name: PARROTT, ROBERT C.

Inventor name: BEATTIE, BRUCE S.

Inventor name: GARCIA, PAUL

Inventor name: KIMZEY, DOUG

Inventor name: MICAK, JAMES

DAX Request for extension of the european patent (deleted)
RIC1 Information provided on ipc code assigned before grant

Ipc: C02F 1/469 20060101ALI20170529BHEP

Ipc: C10G 1/04 20060101ALI20170529BHEP

Ipc: C02F 103/10 20060101ALI20170529BHEP

Ipc: C02F 11/12 20060101ALI20170529BHEP

Ipc: C02F 1/461 20060101AFI20170529BHEP

Ipc: B01D 17/06 20060101ALI20170529BHEP

Ipc: B03B 9/02 20060101ALI20170529BHEP

Ipc: C02F 11/00 20060101ALI20170529BHEP

A4 Supplementary search report drawn up and despatched

Effective date: 20170908

RIC1 Information provided on ipc code assigned before grant

Ipc: C02F 103/10 20060101ALI20170904BHEP

Ipc: C10G 1/04 20060101ALI20170904BHEP

Ipc: C02F 11/12 20060101ALI20170904BHEP

Ipc: C02F 1/461 20060101AFI20170904BHEP

Ipc: C02F 11/00 20060101ALI20170904BHEP

Ipc: B03B 9/02 20060101ALI20170904BHEP

Ipc: B01D 17/06 20060101ALI20170904BHEP

Ipc: C02F 1/469 20060101ALI20170904BHEP

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20180407