REPROCESSING & RETREATMENT
type – the Century zinc tailings retreatment operation, also in Queensland, owned by Sibanye-Stillwater since 2023. The Century operation delivered a strong operational performance for Q1 2025, with resilience measures effectively reducing the wet season’ s impacts, and production of 25,000 t of payable zinc, a 51 % increase compared to the 16,000 t produced in Q1 2024, when production was impacted by severe regional weather. Options to leverage the existing infrastructure( processing plant, pipeline and port infrastructure) and extend the life of the assets beyond the current zinc retreatment operations are being actively explored. This includes opportunities to potentially utilise the Century operation infrastructure to access the extensive largely undeveloped phosphate resources in the region, with a feasibility study currently underway and forecast to be complete by year end.
Over in Canada, Hudbay is continuing to advance Flin Flon tailings reprocessing opportunities in Manitoba through metallurgical test work and economic evaluation to assess the possibility of producing critical minerals and precious metals in an environmentally friendly manner. The Flin Flon mining site has more than 100 MT of tailings which have been deposited for over 90 years from the mill and the zinc plant. The studies are
evaluating the potential to use the existing Flin Flon concentrator, which is currently on care and maintenance after the closure of the 777 mine in 2022, with flowsheet modifications to reprocess tailings to recover critical minerals and precious metals in an environmentally-friendly manner. The more advanced opportunity relates to the zinc plant tailings where metallurgical test work continues following positive results from the initial confirmatory drill program completed in 2024. The results confirmed the grades of precious metals and critical minerals previously estimated from historical zinc plant records. An early economic study to evaluate the opportunity to reprocess the zinc plant tailings has confirmed the potential for a technically viable reprocessing alternative.
EnviroGold on rapid progress with NVRO Process™
In January, EnviroGold Global executed a Memorandum of Understanding for a global strategic alliance with Fraser Alexander to advance sustainable mining solutions for existing and potential customers. With over a century of expertise, Fraser Alexander is a leading tailings storage facility operator, hydro-remining and tailings deposition contractor, overseeing more than 50 tailings storage facilities( TSFs) worldwide,
EnviroGold says. Fraser Alexander has a successful track record of research and development and deployment of new technologies, it added.
Fraser Alexander and EnviroGold have identified several customer opportunities to recover large quantities of valuable metals locked within TSFs and are collaborating to commercialise these opportunities and continue to evaluate projects within each other’ s networks, EnviroGold claims. The parties will deliver solutions for mining companies and governments that are sustainable, enhance the mining value chain and uphold the highest standards of safety and environmental stewardship. The alliance will deploy EnviroGold’ s proprietary technology alongside Fraser Alexander’ s operational expertise, offering a comprehensive solution for clients.
The company stated:“ EnviroGold’ s patented technology cost-effectively extracts precious, non-precious and critical metals from mine tailings into highly profitable revenue streams, offering sustainable and environmentally responsible solutions to miners and governments worldwide.”
David Cam, EnviroGold CEO, added:“ This strategic alliance marks a key step in the commercialistion of EnviroGold’ s proprietary technology. We are excited about the alliance and working with Fraser Alexander to deliver sustainable mining solutions.
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