Grant Ballantyne

Director Technical Solutions - Global

Metallurgical and Chemical Engineer with more than 10 years’ experience in design, optimisation, operation, research and development.
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Bisbane, Australia

From design to optimisation, everything we do revolves around helping our clients maximise the throughput (revenue) through their particular constraint.

Grant has over 10 years’ mineral processing engineering experience in design, optimisation, operation, research and development. He is a passionate mineral processing engineer that enjoys implementing process improvements by applying fundamental understanding to industrial problems.

Grant has been involved in successful site-based industry research over the past ten years covering five continents and eight commodities. He completed a Bachelor of Engineering (Metallurgy and Chemical) at UQ in 2007 and a Doctorate in Philosophy at the JKMRC in 2012.

At Ausenco, Grant co-ordinates the comminution group including the assessment of new technologies and flowsheets. He also provides input at the front-end of engineering design projects, consults into operations, and assesses the application of enhanced process technologies such as coarse particle flotation and bulk ore sorting.


He was awarded the Minerals Engineering International Young Person of the Year at the MEI Comminution ’18 Conference in Cape Town in 2017 and the 2020 Coalition for Energy Efficiency Comminution (CEEC) Medal for Technical Research.


Australasian Institute of Mining and Metallurgy, Associate

Most recent projects

Consulting – comminution and flotation:

  • Saucito, Pb/Zn/Ag/Au, Mexico
  • Cadia Gold Mine, Cu/Au, New South Wales
  • Sunrise Dam Gold Mine, Western Australia
  • Mogalakwena North Concentrator, Platinum, South Africa
  • Telfer Gold Mine, Cu/Au, Western Australia


  • Collahuasi Copper, 170 Mt/y, Chile: concept study for HydroFloat
  • Corani, 8.2 Mt/y Pb/Ag/Zn concentrator, Peru: NI 43-101.
  • Confidential Copper, Africa: desktop study for HydroFloat


  • Mt Mulgine Cu, 6 Mt/y, Australia: crushing and milling circuit.
  • Zafranal Cu/Au Mine, 23 Mt/y, Chile: pebble crushing circuit.
  • Raygorodok Gold Mine, 5.0 Mt/y, Kazakhstan: HPGR, ball mill

Country experience:

  • Australia
  • Bolivia
  • Estonia
  • Kazakhstan
  • Mexico
  • Peru
  • South Africa