MINERALS PROCESSING EXPERIENCE Newcrest Boddington (2017-present) working with on-site trials of reagents for stabilisation of copper/pyrrhotite concentrate in storage and transport. Minerals and Materials Science and Technology, University of South Australia (2004-2015) Identification of surface chemical factors leading to poor Mo and reduced Cu flotation recoveries at Kennecott Utah Copper (2014-15). Combined flotation studies, mineralogical analysis and surface chemical analysis (PCA ToF-SIMS, XPS, SEM) showed cross contamination of surfaces in blended ore. Recommendations were implemented in practice. Improved strategies for copper recovery from chalcopyrite leaching for Rio Tinto. An international patent, lodged and funded by Rio Tinto (Esdaile, Gerson et al., Recovery of copper from chalcopyrite, WO2003/038137, PCT/AU0/01468, 2003, Australia, Canada, Chile, China, Indonesia, Kazakhstan, Mexico, Russian Federation, United States of America and Zambia) that defined an industrial leach process resulted from research undertaken by Gerson and her team. This led to a column leach study ($1.5M) and two in-house Rio Tinto research projects ($0.92M, $0.62M). These formed the rationale for a pilot scale feasibility study at a site in Peru ($4.5M) and a larger scale test leach process at Kennecott Utah Copper Corporation, USA. Identification of the mineralogical location of nickel in ore and leach residues, for Anglo Research, leading to increased pilot plant recovery from 70% to 96%. Increased understanding of the mechanisms of crystal growth modifiers for improved control of gibbsite precipitation in the Bayer cycle (Ondeo-Nalco). Increased understanding of scaling mechanisms in single stream Bayer plants (Cytec Industries). Identification of errant platinum species in refinery liquors for Anglo Research; development of diagnostic surface analysis techniques for specific application to platinum group metal flotation and refining. Elucidation for Anglo Platinum of flotation processes (specifically relating to Cu activation) leading to incomplete value recovery with recommendations for changes to copper dosing. Ian Wark Research Institute, University of South Australia (1995-2004) AMIRA International P260 Mineral Flotation series of projects (1991-2005) on improved minerals processing in flotation separation with sponsorship from more than 25 mining companies (national and international). Contribution (1994-2005) to $318M in net delivered present value (1994-2006) from this project in improved recovery, improved grade and quality of concentrates and reduced operating costs assessed by RMDSTEM Ltd. resource management and consulting group. Determined muscovite reporting mechanisms to the sulfide concentrate at Kanowna Belle Gold Mine of Delta Gold Limited. A $1.5M capital expenditure was justified on the basis of this work with a payback period of 1 year. Increased copper concentrate grade at Mount Isa Mines Limited Copper Concentrator by 4.5% by removal of carbonaceous pyrite in preflotation. Conditions to minimise loss of chalcopyrite to preflotation concentrate identified. Increased copper recovery by 4% at Red Dome Gold Mine (Queensland) following stabilisation of water supply quality using different combination of process water streams. Identified interference with flotation grade. Addition of polyacrylamide to lead circuit of the Cannington Concentrator of BHP Minerals to depress talc. Implemented into plant practice Identified surface interference. Introduced a simple dispersant in grinding for maximising the recovery of fine galena in the Mount Isa Mines Ltd Lead/Zinc Concentrator. Lead concentrate grade and recovery increased from 52.8% Pb at 80.5% recovery to 56.3% Pb at 82.5% recovery with a significant increase in silver recovery to the lead concentrate (>1.5%), and an overall increase in zinc recovery to the final zinc concentrate of 2%. SPONSORING COMPANIES 3M Australia ACI Industrial Minerals Alcoa World Alumina Anglo Platinum Ltd (South Africa) Anglo Research Pty Ltd (South Africa) AMIRA International Billiton Aluminium Australia Birla Nifty Copper Operation (WA) BHP Comalco Cominco/Teck Alaska Ciba Speciality Chemicals Cytec Industries (USA) Exxaro Mining (South Africa) Kennecott Utah Copper (USA) Mineracao Caraiba (Brazil) Nabalco Newcrest Boddington (Australia) Newmont (USA) Ondeo-Nalco OZ Minerals Queensland Alumina Rio Tinto (Australia) Teck Resources (Canada) Tiwest Joint Venture (Kerr McGee/Exxaro) Western Mining Corporation Worsley Alumina