Electrorefining of Manganese

Manganese is an important industrial metal used as an additive for production of various steels, non-ferrous alloys, electronic components and special chemicals. In order to get high purity (99.999%) manganese for advanced applications the electrorefining of manganese will be investigated. Electrorefining will be studied in an ammonium halide salt solution to minimize contamination of the manganese deposit. The electrorefining cell will be designed to have separate anolyte and catholyte compartments with an ion exchange membrane separator.

Atmospheric Acid Emissions, Climate Change, and Coastal Salmon Stream Ecosystems in British Columbia

Atmospheric acid emissions are increasing in north coastal British Columbia from increased metallurgical smelting, marine fossil fuel transport, and development of liquefied natural gas. Acid deposition can cause episodic acidification of streams when acidic compounds are flushed into streams after snowmelt and precipitation events over hours to weeks. Many salmon-bearing coastal streams are likely sensitive to episodic acidification, but these events are poorly quantified in western Canada.

A Study of the Modes of Gold Loss in the Calcium Thiosulfate Leaching of Preg-robbing Ores

The evermore increasing complexity of gold ores is forcing operations to seek alternative gold leaching reagents to the traditional use of cyanidation. At the Barrick Goldstrike mine, the implementation of a non-toxic thiosulfate leaching process is about to become an industrial reality. With modification to the existing infrastructure and leaching circuit, this new process allows for the continued use of autoclaves that were otherwise rendered obsolete.

Metagenomics to assess impacts of the Mount Polley Mine tailings dam breach on associated ecosystems

The Mount Polley tailings impoundment failure released 24 million m3 of mine-influenced water and sediment into the surrounding watershed. The scale of this spill is unprecedented in BC history, and the effects on current and future ecosystems are unknown. Of paramount concern is the containment of toxic metal-containing compounds that threaten aquatic life. My research addresses the role of wetlands and riparian soils in remediation of this spill. I established permanent monitoring sites under a Mitacs Accelerate award to track the progression of contaminants throughout the watershed.

A Study of Basic Iron Sulfate Formation and Control in the Autoclaving of Argentiferous Sulfide Gold Ore

Autoclave treatment of refractory sulfide gold ores oxidizes minerals, such as pyrite, containing gold that cannot be recovered through conventional cyanidation. Oxidation liberates the gold by putting iron into solution. At high temperature and pressure, the dissolved iron tends to precipitate. A problematic iron precipitate that may form is basic iron sulfate (BFS). In the gold industry, BFS is re-dissolved in a “hot cure” process. Two complicating factors occur within the hot cure.

A Study of the Modes of Gold Loss in the Calcium Thiosulfate Leaching of Preg-robbing Ores

The evermore increasing complexity of gold ores is forcing operations to seek alternative gold leaching reagents to the traditional use of cyanidation. At the Barrick Goldstrike mine, the implementation of a non-toxic thiosulfate leaching process is about to become an industrial reality. With modification to the existing infrastructure and leaching circuit, this new process allows for the continued use of autoclaves that were otherwise rendered obsolete.

Electromagnetic Modeling of Mineralogies

Remarkably, very little prior work exists in the narrowly defined area of electromagnetic modeling of rocks and minerals. It is admittedly a difficult problem that requires, by definition, a multidisciplinary team with representation from both the mining and minerals domain as well as the EM modeling and simulation domain. Such a collocation of resources and expertise is being brought together in this team: Dr.

Pre-Oxidation of a Refractory Sulphide Gold Ore in Alkaline Media

The Eldorado Gold Corp. has developed a method of treating a hard-to-process ore from a mine in China in order to increase their recovery of gold. While this process has proven to be effective, more research is needed on the exact method in which this technique works on a very small-scale and detailed basis. The research that will be undertaken involves testing a number of different types of ore and developing a set of conditions to optimize the rate and extent of breakdown of the rocks.

Effect of Mineralogy on the Application of Sensor-based Sorting Techniques Year Two

Comminution, the process of crushing and grinding ore to liberate minerals, is the most energy intensive part of the processing flowsheet and accounts for upwards of 75% of the overall energy consumption of the processing plant. Ideally we would only crush and grind those rocks that contain economically extractable amounts of minerals. MineSense has developed sensors that can detect the level of minerals in rocks and, in particular, can detect very low levels with high accuracy. This proposal is to use MineSense’s sensing technology to pre-concentrate low grade copper ores.

Reclamation of Mercury-Contaminated Tailings from Small Gold Mining

This Mitacs Accelerate proposal is the second of three-phase project of Adriana’s Goncalves master’s thesis. For this Mitacs-Accelerate renewal proposal, it will be investigated further flotation process targeting recovery of 80-90% considering a previous technical feasibility study conducted on material from a representative sample of ASM tailings from Costa Rica. The tailings belong to a small Canadian company, Newlox Gold Ventures Corp. a new gold processing and trading company pursuing precious metal related business opportunities in Latin America.

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