Deflector Tails Leach Project

Scope of Work

GR Engineering was awarded the engineering, design, procurement, construction and commissioning for an upgrade to the existing Deflector Copper Gold project, a plant originally built by GR Engineering.

The scope of work comprised of the design, supply, fabrication, installation, commissioning and handover of the Deflector Tails Leach Project (DTLP) for Silver Lake (Deflector) Pty Ltd.

In summary the DTLP works involved an upgrade to the existing Deflector Concentrator to include a Carbon in Leach (CIL) circuit on the existing Deflector copper ores to be co-treated with ore sourced from the Rothsay Project via the upgraded process as detailed below.

  • The upgrade works included:
  • Pre-leach thickening of flotation tails;
  • Regrinding of flotation tails in a ball mill;
  • Centrifugal gravity concentrators, with intensive cyanidation of the gravity concentrate incorporated into the regrind circuit;
  • Leaching and adsorption circuit;
  • Recovery of loaded carbon, elution and electrowinning of gold and silver from pregnant eluate;
  • Smelting dore bullion;
  • Reagents facilities.

The above plant upgrade was carried out using a combination of both new equipment and some of the existing assets from the Andy Well gold processing plant, another previously built project by GR Engineering.

Onsite activities commenced in early October 2020 after Silver Lake received their works approval. The dismantling of the Andy Well structures and removal of equipment commenced in mid-October 2020.

The first photo below indicates the area within the existing Deflector operations where the upgraded facilities will be installed. The allocated area below requires the existing tails line to be temporarily relocated prior to the bulk earthworks commencing.

The second photo shows the Andy Well ball mill and gravity structure which is some of the Andy Well equipment to be relocated to Deflector.


Project Fact Sheet

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Associated News

Letter of Intent - Deflector Flotation Tails Leach Plant

Letter of Intent - Deflector Flotation Tails Leach Plant

GR Engineering is pleased to announce that it has received a letter of intent (LOI) from Silver Lake Pty Ltd, a wholly owned subsidiary of Silver Lake Resources Limited, for the award of upgrade works involving the flotation tailings leach process at the Deflector gold copper operations.

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  • Client Silver Lake (Deflector) Pty Ltd
  • Award Date July 2020
  • Completion Date June 2021 
  • Location 370 km North Northeast of Perth
  • Region Lump Sum - Brownfields EPC design and construct
  • Project Manager Peter Yates
  • Project Engineer Matt Sala Tenna
  • Project Engineer Siobhan O’Neill