Advocates

JOHN VISSER

PERTH, WESTERN AUSTRALIA

John is an extractive metallurgist and engineer specialising in dust mitigation. He has more than 35 years’ experience in mining, beneficiation and smelting of iron, manganese and chrome ores, and experience in mineral sands, bauxite, coal and phosphates, with a working knowledge of diamonds, gold and PGMs. He also has extensive experience in delivering technical studies for all stages of the project lifecycle, including order-of-magnitude, feasibility, and detailed plant design. In addition, John has been involved in the construction and commissioning of plant.

He has held metallurgical, engineering and marketing roles with Samancor, Anglovaal Mining, Rio Tinto, GRD Minproc, METS, Johen Consulting, Hollandia Reinsurance Group. He is current Director of Johen Consulting and Program Manager for AMIRA International.

John has written two papers and delivered many technical presentations. He was co-author of Airborne Contaminants, Noise and Vibration handbook, one of the Commonwealth of Australia’s Leading Practice Sustainable Development Program for the Mining Industry series of handbooks. A fifth generation African, John moved his family to Perth 15 years ago.

ROMKE KUYVENHOVEN

SANTIAGO, CHILE

Romke is the Productivity Project Leader at SMI-ICE in Chile, and is responsible for the productivity portfolio of research projects. She has more than 20 years’ professional experience in geometallurgy, metallurgical process design, test work management, conceptual engineering and consulting studies. The main focus of her work has been in the field of mineral processing of Cu/Mo ores.

In 1998 she joined SGS Minerals (then Lakefield Research) in Santiago, Chile, where she became Manager Metallurgical Services a few years later. For almost 10 years Romke was actively involved in the organisation of mining conferences supporting the GECAMIN team as head editor and conference manager. This work included the annual PROCEMIN conference series and the 2014 International Mineral Processing Congress in Santiago, Chile. Since 2014, she has been involved in projects related to automation and process control services, geometallurgy and operational improvement. 

Romke is also part-time lecturer at the Universidad Tecnica Federico Santa Maria in Valparaiso since 2011, where she in charge of the 4th year Mineral Processing course for metallurgical engineering students. She has a Master’s degree in mining and petroleum engineering from the Delft University of Technology (1997) and a double MBA from the University of Chile and Tulane University, USA (2008). Early in 2018, she completed the geo-mining-metallurgy executive program at the University of Chile.

Dr Vladmir Kronemberger Alves

BELO HORIZONTE, BRAZIL

Vladmir has 25 years' experience in mineral processing and has been working for VKA technology since 2014. He leads the team responsible for the development of new technology, the design of new circuits for greenfields projects, and the optimisation of comminution circuits. He also has expertise in cement and coal plants, and in consulting.

Vladmir graduated in Mining Engineering from Universidade Federal de Minas Gerais (UFMG) in Brazil, and holds a Master of Science degree and PhD from the same institution. He is the author of approximately 30 papers in mineral processing.

Chih-Ting Lo

VANCOUVER, CANADA

Chih-Ting works extensively with mining companies to improve their energy efficiency, resources utilization, and carbon footprint in core mining, mineral processing operations and balance-of-plant systems. She has 12 years of experience in strategic planning, program development, execution, validation, technical assessment, and capacity building.

Chih-Ting identified a gap in companies’ skill set to prepare then implement programs to improve their energy and resource efficiency while minimizing their carbon footprint. She founded EELO Solutions to bridge the gap by working with clients to develop, implement, and validate programs that are practical, effective, and generate real results. Clients see the value of this result-driven approach and often engage Chih-Ting as a trusted internal advisor to facilitate in all phases of the program.

Chih-Ting is an enabler, technical and policy advisor, and innovative thinker. In addition to her role as a CEEC Advocate, she is a consultant/adviser for the Canada Mining Innovation Council (CMIC), and an adviser for government and utility companies on demand side management programs.

Peter Amelunxen

CANADA

Peter Amelunxen is Vice President of Technical Services at Hudbay Minerals Inc, in Canada, overseeing technical and operational processes and managing project review, due diligence, project and operations risk management. He has worked for 20 years in diverse roles including consulting, grinding and flotation circuit modelling, plant operations, engineering and laboratory testing.

Peter has operated a consulting business in Santiago, Chile and Lima, Peru, and served as Director of Metallurgy for the Aminpro Chile, the metallurgical testing arm of the business. He is an expert in the geometallurgy and the geostatistical handling of point hardness data, and participated in SAG Power Index (SPI) test and CEET comminution model development, and testing and calibration procedures for inferring ball mill and crusher indices from drill core. He spent almost five years in plant operations with Phelps Dodge Mining Company, including mill superintendent of Cerro Verde HPGR-based concentrator in southern Peru. Peter completed his Bachelor’s Degree in Mining Engineering at the University of Arizona and his Master’s Degree in Mineral Processing at McGill University. He has authored many papers on the testing, modelling and design of mineral processing systems and received several awards and a patent for his contributions to mineral processing.

Levi Guzmán Rivera

LIMA, PERU

Levi is Applications Leader at Moly Cop in Peru. A Metallurgical Engineer from the Universidad Nacional de San Agustin de Arequipa, Levi graduated in Mining Innovation Research at the University of Antofagasta in Chile, and completed a diploma in management skills in Technological de Monterrey in Mexico.

He has conducted training courses and specialization at the University of San Luis Potosi – Mexico as well as International Biomining program at the University of Antofagasta, Chile. During 20 years of activity in mineral processing, Levi has conducted several studies of circuit optimization grinding / classification, both conventional milling and grinding Semi- Autogenous, and has conducted research concerning optimization schemes of flotation reagents for different mining companies.

He has presented several research papers at national and international level and is an active speaker at mining sector events.

Laurie Reemeyer

VANCOUVER, CANADA

Laurie is the Principal Consultant at Resourceful Paths, a sustainability and strategy consultancy he established in 2016. Resourceful Paths is focused on reducing energy and water use in mining, mitigating climate change and maximising resource recovery.

Laurie has 24 years’ base metals and gold mining operations and consulting experience. As Plant Metallurgist at Mount Isa Mines, he worked with a team of metallurgists to configure the AG/SAG/ball mill circuit to operate efficiently at a range of throughputs through optimising ball charges, cyclone configurations and operating parameters. At Elura and Century mines, he improved operation of fine stirred mill regrind circuits.

He led the Process Engineering team at Amec Foster Wheeler in Vancouver. The team provided design, due diligence and operational support services for crushing and grinding, flotation, dewatering, smelting, hydrometallurgy, paste backfill and water treatment in commodities including copper, gold, nickel, zinc and diamonds. He has also led several studies, including the Oyu Tolgoi feasibility study update and Blackwater PEA.

Laurie is committed to using mineralogy and laboratory ore characterisation data to determine optimal flotation feed and regrind sizes that balance concentrate grades and metal recoveries with energy and media costs. He also assesses opportunities for selective mining and pre-concentration to reduce energy currently expended on grinding uneconomic particles. He has a Bachelor of Engineering (Minerals Process) from University of Queensland and an MBA (Certificate in Business and Engineering Sustainability) from UC Berkeley.

Robert McIvor

MINNESOTA, USA

Rob is founder and Chief Metallurgist – Grinding Systems, Metcom Technologies, Inc., based Marquette, MI, USA. He has devoted his career to the design and optimization of grinding circuits. He earned a B.Sc. in Mining Engineering from the University of Saskatchewan and a Masters in Mineral Economics from McGill University before going to work for Allis-Chalmers. There he worked in slurry pump and grinding mill application engineering, the latter as understudy of F.C. Bond and C.A. Rowland, Jr. He moved to Dominion Engineering to head mill application design, and then to Linatex Canada to manage pump and cyclone equipment process design.

Having discovered “The Functional Performance Equation for Closed Circuit Grinding”, he returned to McGill to earn his Ph.D. in Metallurgical Engineering by developing methodology for industrial plant grinding process improvement. Moving into private practice, he developed a comprehensive system and training program for plant grinding process management. He then worked for Cleveland-Cliffs in grinding process improvement and managed research and development before founding Metcom Technologies, Inc., in 2003.

Through Metcom, Rob has been providing consulting and delivering training to scores of companies worldwide. In 2010 the Canadian Mineral Processors awarded him the “Art MacPherson Medal for Significant Contributions to Comminution Technology”.