Lagoa Salgada submission of updated environmental study18 Nov 2025 10:49
Interesting recent article on Lagoa Salgada https://observador.pt/2025/11/14/promotor-da-mina-de-cobre-da-lagoa-salgada-deixa-cair-substancia-toxica-e-volta-a-tentar-aprovacao-ambiental/ (without paywall at https://archive.is/pMP2a). Hereβs the rough Google translation:
"...the new processing circuit will be based 'exclusively on a conventional flotation process, using reagents commonly used in the mining sector, namely collectors, foaming agents and modifiers, with proven effectiveness and a significantly lower hazard profile'. This change, it is argued, 'will eliminate the risks associated with the use of sodium cyanide, namely the potential for contamination of the environment as well as for the health and safety of workers.'
[...] The project gained PIN (potential national interest) status in 2022 and represents an investment of 196 million euros.
The new strategy [...] allows for the "production of a polymetallic concentrate that not only captures a part of the gold and silver content, but, crucially, allows the economic recovery of lead and vanadium. Although silver and gold recoveries are lower than those that could be achieved with cyanide, the process gains significant value by incorporating lead and vanadium content that was previously ignored."
Vanadium is described as "a strategic material for energy storage and the manufacture of metal alloys, adding even greater relevance in the context of European strategies for critical raw materials." This material is used in batteries.
Lead has an immediate commercial value, so the change in the "metallurgical philosophy" from selective recovery to comprehensive extraction significantly enhances the economic viability and sustainability of the project. The documents presented point to a reduction in investment of US$15 to US$20 million and an increase in NPV (net present value) of between US$7 and US$12 million over the life of the mine, which is 11 years after the start of exploration, and whose start-up can take two years after licensing. [...] The project's footprint has been reduced by about 28.4 hectares to 41 hectares."
A more detailed overview can be found in the PPT presentation (in Portuguese) submitted to AIA around 13 Nov. 2025 here https://siaia.apambiente.pt/AIADOC/AIA3778/volumei-rnt_art16_lagoa%20salgada20251112121951.pdf