What's Happening?
Viking Mines (ASX:VKA) has announced successful results from ore sorting technology applied to its Linka Tungsten Project in Nevada, US. Assay results confirm the production of 'high-grade' tungsten products, with grade increases up to 4.1 times the original
feed grade. The TOMRA X-ray transmission (XRT) test work demonstrated grade upgrades ranging from 1.2 to 4.1 times the feed grade across two samples, achieving tungsten recoveries of up to 93%. Managing Director Julian Woodcock highlighted the technology's ability to prioritize either grade uplift or tungsten recovery. For instance, the Conquest Pit sample yielded a 'high-grade' product with 1.91% WO3, approximately 3.1 times the calculated feed grade of 0.61% WO3, containing 27.3% of the tungsten in just 8.8% of the mass. Similarly, the Linka Stockpile sample showed an even higher upgrade ratio, producing a 'high-grade' product of 1.83% WO3, about 4.1 times the feed grade of 0.45% WO3. Both samples also produced 'low-grade' reject streams, demonstrating the technology's potential to remove waste and upgrade material from existing stockpiles.
Why It's Important?
This development is significant for the U.S. mining industry, particularly for critical minerals like tungsten, which is essential for various industrial and defense applications. The successful implementation of ore sorting technology at the Linka Tungsten Project could lead to more efficient and economically viable extraction of tungsten resources in the United States. By significantly increasing the grade of tungsten products and improving recovery rates, this technology can reduce processing costs and environmental impact associated with mining lower-grade ores. This efficiency gain could enhance the competitiveness of domestic tungsten production, potentially reducing reliance on foreign sources for this critical mineral. Furthermore, the ability to upgrade existing 'low-grade' stockpiles into viable plant feed represents a substantial opportunity to unlock previously uneconomical resources, extending the lifespan of existing mines and contributing to the nation's mineral security. The flexibility of the technology to optimize for either grade or recovery provides strategic advantages for mine operators in managing their resources and market demands.
What's Next?
Viking Mines is proceeding with further testing, including gravity and flotation test work on the sorted products at Base Met Labs. This next phase aims to assess the effectiveness of downstream processing methods. The results from these tests will be integrated into a conceptual processing flowsheet, which is being developed by Mineral Technologies for a 300,000 tonnes per annum processing model. This integration will be crucial for designing an optimized and efficient processing plant for the Linka project. The company anticipates that the ore sorting technology will provide two key value sources: pre-concentration of run-of-mine feed to increase plant feed grade and the upgrading of existing surface stockpiles to convert lower-grade material into viable plant feed. The successful completion of these studies will pave the way for potential full-scale development and operation of the Linka Tungsten Project, contributing to the domestic supply of high-grade tungsten.
Beyond the Headlines
The successful application of advanced ore sorting technology, such as TOMRA XRT, at the Linka Tungsten Project highlights a broader trend in the mining industry towards technological innovation to enhance resource efficiency and sustainability. This approach not only improves the economic viability of mining operations but also aligns with environmental goals by reducing waste and energy consumption per unit of extracted metal. For the U.S., this could mean a revitalization of domestic mining for critical minerals, fostering job creation and technological expertise in the sector. The ability to process lower-grade ores and existing stockpiles also addresses the challenge of diminishing high-grade deposits, ensuring a more sustainable supply chain for essential materials. This shift towards data-driven and technologically advanced mining practices could set a precedent for other mineral projects across the nation, promoting a more resilient and self-sufficient domestic supply of critical resources.
