GRE has 60+ years of combined mineral processing experience and has established a fully equipped laboratory for mineral processing, geotechnical, and environmental investigations.

 

Services

The laboratory is equipped with the mineral processing equipment necessary to evaluate a wide variety of flowsheets including gravity, gold leaching, flotation, and heap leaching, among others.  The laboratory is also outfitted with various geotechnical and environmental testing equipment.  

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Our laboratory consulting services include:

• R&D for various metals extraction

• Plant audits and optimization

• Process development

  • Preliminary flowsheet​

  • Geometallurgy

  • Detailed design

• Pilot plant design, construction, and operation

• Environmental audits​

• Environmental testing 

  • Kinetic cells​

  • ARD

  • Water treatment

• Geotechnical Analysis​

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Laboratory Capabilities

• Sample preparation and comminution

• Assays

• Flotation

• Gravity Separation

• Hydrometallurgical processes

  • Bottle Roll and Column Leach testing (traditional or bioleach) - Au, Cu, Zn

  • SX/EW - Cu, Co, Zn, Ni

  • Ion Exchange - Cu, Co, Zn, Ni, Li

  • CSTR Biooxidation

  • Oxidation Processes

• ​Bioleaching and other biological processes

  • Sulfide Oxidation​

  • Metal Reductions

  • CN Treatment

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Laboratory R&D​​

GRE has been involved with a variety of clients in the development of unique processes for metal recovery. Process investigations include:

• Lithium  extraction from claystone ores

• Lithium, Nickel, and Graphite recovery from spent batteries

• REE, Copper and Gold recovery from e-waste

• LFP/NMC battery recycling

• Cobalt recovery from copper heap leach effluent

• Flotation scoping study for new copper sulfide project

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Pilot Plant

GRE  has experience designing, constructing and operating a wide variety of pilot plant units.

• Continuous bioreactors for sulfide oxidation

• Continuous bioreactors for ferrous oxidation

• Simulated moving bed ion exchange circuit - CCIX

• SX/EW circuits

• ARD treatment

• Demonstration scale bioheap leach plants for both refractory gold and copper

• Electrochemical metal reduction/oxidation

• MHP - mixed hydroxide precipitation - copper, cobalt

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Equipment

The laboratory is equipped with:

• Jaw Crusher x 2

• Rod/Ball Mill

• Sample Splitters

• Gilson Screen

• Rotap

• Sweco Screen

• Falcon Concentrator

• Shaking Table

• Multiple Heap Leach Columns

• Inoculum Growth for Bioleaching

• Multiple Microscopes

• Tangential Flow Filter

• Centrifuge

• D12 Flotation Machine

• Pilot SX/EW - Cu, Co, Ni, Au, Ag

• Pilot Inoculum Production

• Ion Exchange

• Vacuum Filter

• CSTR Bioreactors x CIP/CIL

• Distillation

• Fumehood

• Atomic Adsorption

• UV/VIS Spectrophotometer

• Misc Ancillary Equipment

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Contact: Kain Nugent (knugent@global-resource-eng.com)

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