www.electrokineticsolutions.com Introduction EKS Technology - - PowerPoint PPT Presentation

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www.electrokineticsolutions.com Introduction EKS Technology - - PowerPoint PPT Presentation

Sep 18, 2023 251 likes •431 views

www.electrokineticsolutions.com Introduction EKS Technology Process developed for in situ FFT densification Uses unique electrical field management [EKS IP] orders of magnitude lower electrical energy than previous electrophoresis

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Introduction EKS Technology

Process developed for in situ FFT densification Uses unique electrical field management [EKS IP]

  • orders of magnitude lower electrical energy than

previous electrophoresis methods

Application for Fines-Dominated Deposits

www.electrokineticsolutions.com

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Technology Status Current status

Bench to 1 m3 lab scale and 2-D 5-metre tests completed 150m3 scale tests planned for summer 2014 Tests show reduced unit energy requirement as scale and electrode spacing is increased

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Test Parameters

  • Confirmed 1,000L treatment feasibility
  • 1000L Volume
  • Vessel size: 1m x 0.75m x 1m
  • Starting solids content 41.6% solids/wt Shell MFT
  • Voltage gradient: 1 to 2v/cm
  • Duration: 14 days

Assessed

  • Release water quality and volume
  • Horizontal voltage gradient
  • Post-treatment shear strength and moisture analysis
  • Qualitative mapping of electrical field around electrodes
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  • 14 Days Treatment
  • 330 L Water Separated
  • 56.9% Solids
  • Up to 200 kPa Shear

Strength

  • 109 kWh Used
  • $8.72/m3 treated
  • $15.53/Dry tonne
  • 330kW/m3 Water

Recovered

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  • 7 Weeks Treatment
  • 260 L Water Separated
  • 49.4% Solids
  • Up to 135 kPa Shear Strength
  • 190 kWh Used
  • ~30% Volume Reduction
  • Greater electrode spacing may be

possible

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SLIDE 7

5m Vertical Electrode Spacing Test % Solids Distribution

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  • 10 Days Treatment
  • ~490L Water Separated
  • ~40% Solids
  • 39 kWh Used
  • ~50% Volume Reduction
  • Greater electrode spacing may

be possible

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Water Chemistry

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 Water suitable for process water recycling  May need minor conditioning to meet site specific requirements

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Predictive Model

 Predictive model developed based on process fundamentals and refined with actual test results  Provides practical support for selection of optimal configuration parameters

  • Treatment duration
  • Electric field strength
  • Electrode material and spacing

 Provides a basis to determine the cost/benefits of reclaiming tailings against

  • perational metrics such as: space, material handling, volume reduction, etc…

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MFT Water Cap

EKR Process End Pit Lake Post Treatment

Electrodes Extracted Water

  • Could be an in-pit deposit such as lake bottom
  • Could be an above grade pond
  • Vertical electrode arrangement with target densities

dependent on final reclamation plans

Extract water and compact tailing in-place increasing capacity of the deposit.

Compacted Tailings

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In-place dewatering with fines separation/compaction to improve fines capture in settling basins and disposal areas

 Makes use of existing facilities for in situ treatment of tailings  Works on a range

  • f solids contents

 Extracted water is suitable for return for process use  Horizontal or Vertical Electrode arrangement

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Issue: Upper part of deposit will not consolidate or support sand capping. Alternatives: 1. Sand raining – Challenging distribution Prone to failures, textiles may be needed 2. Desiccation of surface Shallow layer - then shuts down Ditching needed to deepen 3. Slow, hazardous access 4. Frozen surface access Mechanical spreading Slow, hazardous, expensive Solution: Densify upper  5 m using EKS technology sufficient to carry hydraulically placed sand cap and surface soil. www.electrokineticsolutions.com

10 20 30 40 50 60 70 80 90

Deposit Height (m) Total Solids Content(%) Year 1 Year 5 Year 10 Deposit Completed Year 15 Capping Completed Year 22 Year 30 Year 85 Source: Tailings & Mine Waste November 3rd-6th, 2013

Potential Applications Densification of TT Deposits

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 2014 Vertical large scale testing at C-FER facility in Edmonton

  • 5m 150m3 3D test
  • Validate vertical electrode configuration/spacing
  • Confirm reduced energy at larger scale
  • Refine predictive model

 2014 Horizontal large scale testing at C-FER facility in Edmonton

  • Demonstrate horizontal electrode configuration
  • 40m3 3D test
  • Refine predictive model

1.7m 10m 6m 2.5m 2.5m

 2015 Field Demonstration

  • Scale dependent on technical requirements and

facility availability  2016 Commercial Implementation

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Funding

Proposal in front of AI-EES Shell committed for 2014 scale up work program SDTC funding has been obtained for 2014 & 2015 Initiating dialogue with additional partners

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SLIDE 16

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Contacts

Paul Mankowski: pmankowski@shaw.ca

Phone: (403) 669-8216

Jim Micak: Jim.Micak@Electrokineticsolutions.com

Phone: (416) 203-7222, ext. 225

Go to http://www.electrokineticsolutions.com for more videos and more contact information.