Session 3 | Comminution (Part 1)
| Monday, October 19, 2026 |
| 1:05 PM - 2:35 PM |
| Great Hall Q1 & Q2 |
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Sponsored By:
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Speaker
Dr Richard Bearman
Director
Bear Rock Solutions Pty. Ltd.
Pebble crushing in AG/SAG circuits: Operation, dynamics and solutions
1:05 PM - 1:20 PMBiography
Richard (Ted) Bearman first operated a crusher in 1985 and has since developed a career spanning comminution, mine-mill systems, flowsheet design and innovation across the mining value-chain. After spells with an equipment vendor, research organizations and Rio Tinto (comminution, innovation, simulation and general management), Ted established BRS in 2009. Over the last 16 years' BRS has worked on a wide range of operational projects and has accumulated a wealth of knowledge regarding the practicalities of delivering full value from equipment and systems. Innovative and energy effective approaches are central to many of the projects undertaken and this includes novel technology, including microwave methods, but also optimization of existing milling circuits. To ensure project objectives are met, BRS utilizes an extensive network of professionals. Ted is a Fellow of the Institute of Materials, Minerals and Mining, a Fellow of the AusIMM, a Chartered Engineer and has authored a wide range of peer reviewed papers. He also authored the crushing chapters of the 2019 SME Mineral Processing & Extractive Metallurgy Handbook, was a Keynote Speaker at the IMPC 2024 and is an Honorary Professor in Mineral Processing at the University of Nottingham.
Dr Rajiv Chandramohan
Global Technical Director
Ausenco
Issues with determining the SAG mill specific energy – Key drivers influencing mill selection
1:20 PM - 1:35 PMBiography
Rajiv Chandramohan is a globally recognised leader in process optimisation, comminution, and geometallurgy, serving as Director & Head of Process Optimisation at Ausenco. With 23 years of experience spanning operations, engineering, research, and project management, he leads a team of technical specialists to deliver innovative, cost-effective solutions that redefine mineral processing efficiency. His expertise in SAG-based circuits, HPGR, mine-to-mill integration, and AI-driven analytics drives high-value outcomes across gold, copper, base metals, graphite, phosphate, and polymetallic projects.
With over 50 peer-reviewed publications, Rajiv provides technical guidance to study and project teams, fostering a culture of continuous improvement and technical excellence. He peer-reviews optimization initiatives, champions non-standard approaches, and oversees equipment selection, flowsheets, process models, and technical studies from concept to commissioning. As a key innovator, he developed several applications for the mining industry, driving advancements in sustainable, ESG-aligned process technologies.
Mentoring global talent, Rajiv delivers feasibility studies and consultancy services, setting industry benchmarks with low-cost, efficient designs and cutting-edge solutions that balance economic value with environmental and social responsibility.
Mrs Ivka-Anna Lovatt
Principal Metallurgist
Orway Mineral Consultants
Success factors in HPGR circuit ramp-up and operation
1:35 PM - 1:50 PMBiography
Ivka is a Chartered Professional of the AusIMM and holds degrees in both Chemical Engineering and Law. She brings 15 years of experience in the mining industry, with a strong background in magnetite processing, comminution circuit consulting, and process engineering.
Her expertise spans comminution circuit test work management, modelling, design, commissioning, and optimisation. Ivka has contributed to more than 50 comminution circuit designs, third-party reviews, and plant optimisation projects, with several case studies featured in industry conference proceedings.
She is a recognised specialist in HPGR (High Pressure Grinding Rolls) circuit design, modelling, ramp-up, and optimisation, having worked on over 10 operating HPGR circuits across Australia, North America, and West Africa.
Ivka is passionate about eco-efficient comminution and was awarded the CEEC Medal in 2024 for her contributions to improving energy efficiency in the resources sector.
Shawn Chan
Gold Fields
Reinstating regrind for recovery: Spiral technology and sulfide circuit upgrade at St Ives
1:50 PM - 2:05 PMBiography
Shawn Chan is current a project metallurgist at Gold Field's St Ives Gold Mine operations. Shawn has 5 years of experience in the mining industry, spanning from design of greenfield and brownfield gold processing plants to process and metallurgical experience with operations.
Mr Giehard Nebre
Senior Applications Engineer
Molycop
Q&A with Session Chair (Session 3)
2:05 PM - 2:30 PMBiography
A Metallurgist from the University of NSW, Giehard has extensive experience in the steel and ferrous minerals industry. He has worked as a Metallurgist in magnetite operations and several steel mills. He has been providing after-sales technical support for Molycop’s customers for the past 12 years. Prior to his current role, Giehard was involved in research and product development in SAG ball media.
Dr Grant Ballantyne
Director
CEEC
2025 CEEC Awards
2:30 PM - 2:35 PMBiography
Grant is a Technical Director at Ausenco, providing critical input at the front-end of engineering design projects, consulting with operations, and assessing the economics of enhanced process technologies to improve ESG outcomes.
He has been involved with CEEC since its inception, attending the first workshop in Noosa in 2012 where the idea for the Energy Curves was born and developed into a project he led while working at the JKMRC.
Grant completed a Bachelor of Engineering 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. Grant has also published 50+ journal and conference articles and presented at 40+ conferences.