Can Rox Resources Maintain Momentum Amid Youanmi’s Construction Challenges?
Rox Resources reports metallurgical test results confirming over 94% gold recovery at Youanmi using Albion oxidative leaching, advancing its path to production. The company also appoints Increva to oversee key construction phases.
- Albion oxidative leaching achieves 94.0% to 95.8% gold recovery on flotation concentrates
- Overall plant gold recovery expected between 90% and 92% after flotation tail leaching
- Ongoing test work to optimize grind size and sulphur oxidation ahead of November DFS
- Increva appointed as Owners’ Team for process plant, power station, and tailings facility construction
- Youanmi project development remains on track with drilling, dewatering, and engineering progressing
Metallurgical Breakthrough at Youanmi
Rox Resources Limited (ASX, RXL) has unveiled encouraging metallurgical test results from its Youanmi Gold Project in Western Australia's Murchison region. Using the Albion oxidative leaching process on flotation concentrates, the company has achieved gold recoveries exceeding 94%, a significant milestone that reinforces the project's economic potential.
The Albion process, which involves ultrafine grinding of sulphide concentrates followed by oxidative leaching in open-air tanks, has demonstrated recoveries of 94.0% at a 12-micron grind and 95.8% at 10 microns. These results suggest that Rox can expect overall plant gold recoveries between 90% and 92% once flotation tailings are also leached, aligning with the company's production targets.
Optimisation and Definitive Feasibility Study
Rox is continuing metallurgical test work to fine-tune the grind size and sulphur oxidation levels, critical parameters that influence recovery efficiency and energy consumption. The ongoing optimisation is integral to the Definitive Feasibility Study (DFS), scheduled for release in November 2025, which will provide a comprehensive assessment of the project's viability and economics.
Managing Director and CEO Phill Wilding emphasized the significance of these results, noting that the ultrafine grinding to 10-12 microns combined with partial sulphide oxidation via the Albion process is expected to deliver maximum gold recovery. The company is confident that this approach will underpin a robust and value-accretive operation.
Construction Leadership and Project Progress
In a strategic move to advance site development, Rox has appointed Increva as the Owners’ Team to oversee construction of the process plant, power station, and tailings storage facility. Increva brings extensive project management expertise, having successfully delivered complex mining infrastructure projects, including hybrid power solutions and accommodation villages.
Alongside metallurgical progress, Rox reports steady advancement in drilling, dewatering, and engineering activities. The company remains on track with its pathway to production, supported by a recently updated Mineral Resource Estimate and ongoing exploration targeting resource extensions.
Looking Ahead
With the DFS on the horizon, Rox Resources is poised to provide further clarity on the Youanmi project's economics and development timeline. The combination of high gold recoveries, experienced construction management, and disciplined project execution positions Youanmi as a compelling opportunity in the Australian gold sector.
Bottom Line?
Rox Resources’ strong metallurgical results and construction appointments set the stage for a pivotal DFS update this November.
Questions in the middle?
- How will ongoing optimisation of grind size and sulphur oxidation impact overall project costs and recovery?
- What are the financing plans and timelines to support Youanmi’s construction and development phases?
- How might environmental approvals and permitting progress influence the project’s schedule?
