30 June 2017: Anglo Gold Ashanti (AGA) has completed a bulk test work campaign aimed at confirming metal deportment responses observed in variability testing on broken ore at near run-of-mine fragmentation distributions at its Gramalote project.

ore
Anglo Gold Ashanti’s Gramalote deposit in Colombia.

This article was published in CRC ORE News - June 2017

Gramalote: Grade Engineering Pre-Feasibility Study Review

By Dr Greg Wilkie; CRC ORE Program Coordinator, Program 1: Define

Blasted samples underwent Grade-by-Size deportment characterisation and progressive crush testing to quantify the metal deportment response relative to changes in particle size distribution.

This work follows on from initial Grade Engineering® studies at the Gramalote deposit which indicated that significant value could be obtained by exploiting natural grade by size deportment. The site’s gold response rankings were consistently amongst the highest seen in CRC ORE testing to date.

In February 2017, AGA engaged CRC ORE to conduct a review of the Grade Engineering® data obtained from this bulk test work program. The primary focus of the project was to review and analyse all bulk testing results, and provide recommendations on the application of Grade Engineering® at Gramalote with a definition of work required as part of a feasibility study.

The key activities conducted in the project were:

  • Review and analyse all Grade Engineering® data collected as part of the Gramalote PFS study.
  • Identify any risks associated with Grade Engineering® application at Gramalote.
  • Investigate the limits of Grade Engineering® for the site.
  • Investigate opportunities for the application of Surge Slave Separator (working title) and conduct a trade-off study between Surge Slave Separator (working title) vs Fixed Plant installation.
  • Identify any additional work required as part of the next stage Feasibility study.

The study was completed in April 2017 and provided AGA with:

  • A comprehensive review of all aspects of Grade Engineering® related to Gramalote.
  • Preliminary assessment of Surge Slave Separator (working title) vs Fixed Grade Engineering® plant trade off study.
  • A forward plan of work required in the feasibility study.

 

 

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  • 24 January 2018: CRC ORE has been involved in a number of high profile events in recent months. Read more about CRC ORE’s Annual Assembly line up and a successful site-based innovation leadership talk with Sumitomo at IMARC2017. CRC ORE also cooperated with METS Ignited to organise an initial consultation session for the consideration of a new CRC for the mining industry at IMARC. A couple of short courses were held – one on Geometallurgy in Tasmania and the respected Gold Plant Operators Course which was run in Kalgoorlie late last year.

    We are in the process of putting together the schedule for the coming year. Stay tuned for a listing of upcoming events in the next edition.

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  • 5 April 2018: CRC ORE's Grade Engineering modelling programs have been strengthened over the summer thanks to the work of four motivated students who joined CRC ORE for our inaugural vacation intern program. Alex Perera, James Bamford, and Jacob Rogers joined us from The University of Queensland (UQ). Samantha Maslin joined us from the Queensland University of Technology (QUT) with the support of Austmine via its women in STEM (Science, Technology, Engineering and Maths) initiative. Hear more about their work by clicking on the video below.

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  • 21 November 2017: The photos and presentations from this year's CRC ORE Annual Assembly have been added to our website.

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  • 30 June 2017: Two of CRC ORE’s Board Members have been recognised for excellence in their chosen fields in recent months. Dr Sue Keay has just been named one of Australia’s first Superstars of science, technology, engineering and mathematics (STEM). This follows news that Joe Pease has been recognised in two prestigious mining industry awards. Also in recent months, CRC ORE was awarded a high commendation for an “exceptional paper demonstrating excellence” in the CEEC Medal 2017 round.

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  • 30 November 2016: For presentations, photos and the wrap up of the 2016 Assembly, read on.

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  • 15 February 2016: Forward thinkers of the mining industry came together at the start of the year to celebrate the official launch of a second phase for the highly successful CRC ORE.

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  • 2 November 2015: The Directors of CRC ORE are very pleased to announce the appointment of Professor Ben Adair as Managing Director and Chief Executive Officer of Australian mining innovation hub, CRC ORE Limited.

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  • 6 October 2015: The CRC ORE team has moved to CSIRO's Queensland Centre for Advanced Technologies (QCAT) in Pullenvale, Brisbane.

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  • 26 May 2015:  CRC ORE is set to be funded for a second six year term with the Australian Government flagging $34.45 million to support vital ongoing work in improving the efficiency and cost-effectiveness of the minerals extraction industry.

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