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Séminaires en ligne à venir
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October 31, 2018 13:00-14:00 EDT
Talk: Mining , Ecological Engineering and Metals Extraction fro the 21st Century
This webinar is an introduction to a recent contribution on sustainable mining, remediation and metal extraction to the Oxford Research Encyclopedia of Environmental Science, Problems and Solutions. Co- authors are M. Kalin, Michael P. Sudbury and Dr. Bryn Harris. The mining industry developed in an age when resources, space and water appeared limitless. A paradigm shift is needed in mining, remediation and extractive metal processes. Human’s insatiable appetite for metals is estimated to produce annually 20 billion tons of waste rock and tailings, covering about 1000 km2 of land. The annual consumption of fresh water is estimated to be about 80 109 tons, most of it will be contaminated. A collision course is on the horizon, given shortages of water and arable land and the ever-increasing global population.
The key to a solution to the present un-sustainable environmental management practices lays in ecologist’s view of mining wastes as extreme primordial environments. Natural recovery processes can be supported through ecological engineering measures. This starts with exploration and through to operations, ending with decommissioning. By providing physical and chemical support to promote existing ecological processes within the wastes, we can alter the surface of minerals, thereby decreasing contaminant generation and reducing the volume of drainage by promoting run-off. Supporting the growth of indigenous biota leading to increased agglomeration of contaminant on the cell surfaces and upon death the biomass with its contaminants sinks to the sediments. Through bio-mineralization in the sediment, the metals are stabilized, potentially generating in the long-term biogenic ore bodies. All processes are implemented within the mine waste and water management area.
Brief examples are given of:
- Acid Reduction Using Microbiology” through sediment construction;
- Alterations of the mineral surface on waste rock reducing sulphide oxidation by effective nutrient supply carried into the wastes by rain and;
- Biological polishing “in alkaline and acid mine waste water by a pH adjustment (if needed) and adjusting nutrient imbalances; as well as
- Estimates of reductions in waste generation using efficient metals extraction processes;
Boojum’s multidisciplinary team has laid the foundation for ecological engineering in publication and field demonstration projects. Moving forward we need to evaluate these demonstration project to use the results to build confidence in the approach of ecological engineering , only then can we achieve the paradigm shift needed for the future of the industry.
Learn about the speaker:
Margarete Kalin is Research Director and President of Boojum Research Ltd. The R& D firm in collaboration with mining companies, the Canadian government and research organizations , has developed and demonstrated an ecological toolkit, that leads to a self-sustaining decommissioned mine waste and water management area. More than 100 scientific publications, numerus chapters in technical books documenting the natural processes and approximately 150 project reports are available on line at http://biblio.laurentian.ca/boojum. Margarete received the Noranda Award for Outstanding Achievements in Land Reclamation from the Canadian Land Reclamation Association and the Teck-Cominco Environmental Award from the Canadian Institute for Mining and Metallurgy (CIM). She was nominated in 2005 as a Distinguished Lecturer by the CIM. She is certified as a QEP (Qualified Environmental Professional ) by the Institute of Professional Environmental Practice and as a Senior Ecologist by the Ecological Society of America. She has been Adjunct Professor at several Canadian universities.
- Recognize the potential of ecological natural recovery mechanisms and their support measures
- Technologies to reduce water consumption and waste production
September 20, 2018 13:00-14:00 EDT
Speaker: David Kratochvil, President & CEO of BQE Water
Talk: Risk Adjusted Life Cycle Cost of Mine Water Treatment
Mine lives are getting longer and water plays an important part of the project life cycle cost. Net Present Value (NPV) is a standard metric for the financial evaluation of long-term projects but it does not include any potential uncertainties or risks in an explicit way. Often, discount rates are increased or special discount factors are introduced to “cover risks” which generates confusion and reduces the credibility and/or confidence in the outcome of the evaluation. This webinar discusses the pitfalls of traditional NPV and risk assessments, and presents examples of overcoming these issues with a Risk Adjusted Life Cycle Cost (RALCC) analysis approach that can be adopted during all projects stages.
Learn about the speaker:
David Kratochvil is a chemical engineer with more than 20 years of experience in the treatment of mine wastewater and metallurgical bleed streams. He is the President & CEO of BQE Water, a Vancouver based company focused on reducing life cycle costs and risks associated with water and improving the performance of metal extraction projects.
- Identify shortcomings of conventional NPV and risk assessments – what does a new method need to address?
- Introduce the concept of RALCC analysis for mine water treatment and management
- Understand the fit for using RALCC for a single project and for a project portfolio
- Provide highlights of project examples where elements of RALCC analysis were used
Who should attend
- Engineers, project managers, technical personnel
June 27, 2018 13:00-14:00 EDT
Speaker: Laurie Reemeyer, Principal Consultant, Resourceful Paths
Talk: Integrated mining and processing systems design for eco-efficiency
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The mining industry faces increasing economic, environmental, and social challenges as easier deposits deplete and ores become more difficult to mine and process, and more stringent environmental and social standards must be met. While these factors increase costs and risks, they also present opportunities for a more integrated approach to mining, processing, materials handling, and waste management. Two areas of particular risk are in tailings and water management. As mining and processing tonnage rates continue to increase, the disturbance footprints, water and energy consumption, and scale of tailings storage facilities also rise. These factors can be mitigated by more selective mining, ore sorting, and pre-concentration, and more intensive tailings dewatering. Such alternatives must be considered in conjunction with the selection of mining method, metallurgical flowsheets, major equipment selection, and key process design criteria. Models for integrated design and possibilities for reducing environmental impact are reviewed.
Learn about this speaker !
Laurie has 23 years experience in operations and consulting globally. While working for base metals producers, he developed an interest in optimizing economics across mining, concentrating, smelting and refining value chains. His roles included Manager Metallurgy at Century Zinc Mine in Australia, and Director Process Strategy at Amec Foster Wheeler in Vancouver. In 2016, he formed Resourceful Paths Consulting to focus on improving sustainability in mining, especially in areas of tailings and water management, energy efficiency and resource recovery. His is Professional Engineer, with a Bachelor of Engineering (Minerals Process) from University of Queensland and MBA from UC Berkeley.
- People will better understand metrics of sustainability relating to mining, and how the design of mining and processing systems can lead to lower impacts.
May 30, 2018 13:00-14:00 EDT
Speaker: Janice Zinck, Director, CanmetMINING
– Green Mining Innovation, base/precious metals, rare earths, chromite – CIM President <
Co presenter: Dr. Rory Cameron, Research Scientist, Natural Resources Canada
Talk: Mining Value from Waste: From Concept to Reality
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The concept of tailings reprocessing is not new. However, due to technical, policy and regulatory complexities, successes have been limited. The recovery of metal values from tailings is generally viewed as the primary incentive, but is unlikely to be successful unless it is combined with a concomitant reduction in environmental liabilities and the development of downstream market opportunities for tailings products. CanmetMINING is developing an initiative called “Mining Value from Waste”, which aims at bringing together the Canadian R&D community to develop a more cohesive and sustained effort to develop demonstrable reprocessing technologies to address a variety of mine wastes. While currently principally focused on tackling the enormous existing and historic tailings liabilities, it is expected that this effort will grow and eventually transition to include processing opportunities for eliminating or vastly decreasing the generation of new tailings. The webinar will present an overview of the initiative, tailings reprocessing case studies, as well as technical results of one of the sub-project areas on bioleaching.
Learn about this speaker !
Janice Zinck is a director at CanmetMINING, a research, development and innovation arm of Natural Resources Canada. Janice has more than 25 years’ experience in the leadership of multidisciplinary programs to address mineral resource development-related to environmental and processing challenges. She has been involved in many national and international multi-stakeholder initiatives where she has developed strategic priorities, partnerships and collaborations. She was instrumental in the creation of Canada’s Green Mining Initiative and more recently the national program on rare earth elements and chromite development in Canada.