Grant Ballantyne

Director Technical Solutions - Global

Metallurgical and Chemical Engineer with more than 15 years’ experience in design, optimisation, operation, research and development.
Connect on LinkedIn
Brisbane, Australia

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

Grant has 15 years of mineral processing engineering experience in design, optimisation, operation, research, and development. In addition to his role as Technical Director at Ausenco, Grant is a Director of CEEC international where he leads the Technical Advisory Group.

At Ausenco, Grant coordinates the development, innovation and assessment of new technologies and flowsheet strategies for the international comminution group. He also provides critical input at the front-end of engineering design projects, consults with operations, and assesses the economics of enhanced process technologies such as coarse particle flotation and bulk ore sorting. He is also a leader in assessing and improving ESG outcomes for projects.

Grant completed a Bachelor of Engineering (Metallurgy and Chemical) and a PhD at the University of Queensland. In 2019, he won the CEEC medal and in 2017 he was awarded the Minerals Engineering Young person of the year award.


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