Presentations
28/03
at 10H30 | 518 B

Evolutions in the Mining Industry

Moderated by: Denis Millette, Polytechnique Montréal
Innovation and clean technology
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- Innovate to Sustainably Restore a Mining Site: The Nature as a Model

The restoration of mines in northern Quebec presents numerous challenges. Not only are the sites difficult to access, limiting the amount of inputs that can be used, but the extreme climate of the region make the environment unsuitable for plant growth. T² Environnement and Viridis Terra Innovations have developed an experimental trial for the TSMC iron mine in order to develop an innovative low-input restoration method adapted to arctic extreme conditions. This trial integrates combinations of treatments (irrigation, site preparation, inputs, and various planting methods) with different indigenous shrub species in order to identify the combination best suited to the harsh. conditions of the site. A microbial inoculant is also developed in collaboration with Laval and McGill Universities. Several treatments are currently being tested and the first site monitoring was conducted in the fall of 2018.

- Changing Effluent Regulations in Canada, Helping Mine Sites to Reach New Limits

On June 1st 2018. Environment and Climate change Canada released the final version of the Metal Mining Effluent Regulations. This will be the first extensive update since they were conceived in 2002.The updated regulations have new or more restrictive limits for key contaminants of concern to many mining operations in Canada. To adequately support mining operations and meet the regulatory requirements governing them, the need to measure metal concentrations in a variety of sample matrices at ultra-trace levels continues to challenge the industry. New analytical technologies that support higher sensitivity (lower detection limits), increased data reliability, and lower costs, are available. A review of these technologies: ICP-tandem mass spectrometry (ICP-QQQ) and ICP-high resolution mass spectrometry (ICP-HRMS) and their applications will help mine sites to choose what will work best for a specific site or monitoring program.

- Biodegradable hydraulic fluid used underground at Eldorado Gold Lamaque

The legal and environmental issues of underground mining sludge at the Lamaque Mine site (Triangle zone) cause many challenges in 2017. Indeed, these issues associated with the sustainability of groundwater, the sensitivity attributable to proximity to the City of Val-d'Or, the legal management of petrochemical hydrocarbon-contaminated sludge and the costs associated with the management of these hydrocarbons led to a strategy to replace petrochemical hydraulic fluids from underground heavy machinery.The whole sector was solicited : supplier, guarantee of supply of bio-oils, conversion of the fleet of equipment, legal chemical analyzes of sump sludge and deregulation of it in accordance with standard methods tested by accredited analytical laboratories. and the Provincial MoE (MELCC). CofA requests were ultimately produced and obtained in support of this whole environmental improvement process.