A novel and potentially more eco-friendly approach to mining lithium might streamline the extraction of this vital mineral from deposits in Western Canada. Companies are progressing towards proving the scalability of this new technology.
Traditionally, lithium is sourced from very saline underground water known as lithium brines, which have been challenging to access using conventional methods. The emergence of direct lithium extraction (DLE) technology could offer a more environmentally friendly and possibly cost-effective way for companies to extract lithium from these resources.
Alberta has become an appealing location for one such company, LithiumBank, due to its existing oil and gas infrastructure that can be repurposed for lithium mining. The company holds licenses for two lithium projects in Alberta and is repurposing old oil and gas wells to access the underground brines containing lithium.
DLE technology, as opposed to traditional methods like rock mining in Australia or brine extraction in South America, aims to extract lithium directly using chemicals, reducing the reliance on solar evaporation. Canadian lithium brines, unlike those in arid regions, require different extraction methods.
Research conducted by Ngai Yin Yip at Columbia University has shown promise in using a new solvent for lithium extraction from brines, although the challenge lies in demonstrating the technology’s effectiveness at a larger scale. Similarly, LithiumBank has successfully pilot-tested its DLE technology and is working on further tests to showcase the quality of the lithium extraction.
Canada currently has only two lithium mines, both extracting lithium from hard rock. As global demand for lithium surges, driven by electric vehicle batteries and renewable energy storage, new extraction methods like DLE are gaining traction.
Regarding environmental impact, DLE offers benefits over traditional extraction methods if powered by clean energy sources. Studies comparing the environmental costs of different lithium extraction methods highlight the importance of energy emissions, land use, and water consumption in the extraction process.
While DLE reduces land use significantly compared to brine extraction methods, energy emissions remain a concern. By utilizing renewable energy sources like solar power, these emissions can be minimized. Additionally, DLE saves water, making it a more sustainable option when coupled with reliable and eco-friendly electricity generation systems.
In conclusion, the adoption of DLE technology in lithium mining presents a promising opportunity for more sustainable and efficient extraction methods, paving the way for the future of lithium production in Canada.