Reinventing the Mineral Value Chain: The Science of Responsible Mining

Led by Professor Claude Bazin, Axis 3 of Université Laval’s E4m Research Centre focuses on developing and optimizing eco-responsible mineral processing methods, covering the entire value chain from primary extraction to recycling and the circular economy.

Research is structured around four complementary themes:

- Comminution: Modelling and energy optimization of crushing and grinding (particularly HPGR technologies) to drastically reduce electricity consumption at mine sites.

- Beneficiation: Physical, physicochemical (flotation), and hydrometallurgical separation to maximize the recovery of critical minerals (such as gold, lithium, rare earths, and cobalt) while valorizing tailings and recycling.

- Optimization: Utilizing computational molecular simulation (DFT), digital twins, and predictive control algorithms to stabilize and optimize plant yields in real time.

- Intensification and Chemical Looping: Transitioning to low-carbon processes by integrating forest biomass to replace fossil reagents and developing hybrid processes that combine CO₂ capture and mineralization.

To validate their innovations, Axis 3 researchers rely on state-of-the-art infrastructure, including the Process Operations Optimization Laboratory (LOOP) and the Vision and Numerical Systems Laboratory (LVSN). They collaborate closely with major industrial partners (Agnico Eagle, Rio Tinto, Glencore, COREM) and government agencies to accelerate technology transfer and secure critical mineral sovereignty.

This presentation illustrates how academic research can help improve mineral exploration efficiency at different scales. The first example focuses on the Gaspe Peninsula, where our recent work at the regional scale highlighted the existence of two distinct metallogenic cycles formed over a period of approximately 30 Ma. These cycles are associated with intrusions showing different geochemical signatures and contrasting potential for porphyry- and skarn-type copper mineralization.

The second example concerns the Val-d’Or area and highlights recent advances by our research group regarding the use of the chemical composition of alteration minerals as a vectoring tool for orogenic gold deposits. This work demonstrates how academic research can generate practical tools to guide and optimize mineral exploration efforts.

The exploitation of mineral resources is essential to the energy transition and economic development, but it must be pursued within a framework of environmental and social sustainability. This presentation will highlight Research Axis 4 of the Centre for Research on Geology and Mineral Engineering (E4m), which focuses on the environmentally responsible development of mineral resources. This axis brings together a multidisciplinary team of researchers working to design innovative solutions aimed at reducing the environmental footprint of mining activities throughout the entire mine life cycle.

The research activities conducted within this axis address a broad range of challenges related to the sustainable management of mineral resources, the understanding of natural and industrial systems, and the reduction of environmental impacts associated with extractive activities. These efforts rely on integrated approaches that combine characterization, modelling, technological development, and resource valorization. The work also seeks to support the transition toward lower-carbon processes, promote circular economy principles, and strengthen the resilience of communities and territories in the face of current and future environmental challenges. Selected recent achievements and research projects will be presented to illustrate the diversity of expertise involved and the tangible outcomes of the research carried out within the axis.

By combining scientific expertise, technological innovation, and an integrated approach to environmental management, E4m’s Axis 4 contributes to the development of more responsible mining practices and supports progress toward decarbonization and sustainable development objectives.