Located in traditional Dene territory, about 200 km west of Fort Simpson, the Prairie Creek property is home to what is regarded as one of Canada's next large high-grade zinc-lead-silver mines.
Some buyers have said they are shunning Rusal's metal, while others are securing price discounts at the same time as the industry negotiates supply deals for 2023.
In a presentation at Perumin, finance minister Kurt Burneo reiterated the policy priorities that have endeared him to the industry, such as maintaining tax rates, offering fiscal benefits and cutting red-tape in a bid to attract investments.
Glencore put zinc sulphide operations at the Portovesme plant on care and maintenance in November 2021, but continued production of zinc recycling and lead.
Reuters sources say the exchange was planning to discuss banning new deliveries of Russian metal so its warehouses cannot be used to offload hard-to-sell stock.