Nova Minerals has completed engineering and design for its Estelle antimony pilot plant in Alaska, moving swiftly into procurement and construction with equipment en route to site.
- Engineering and design for Estelle antimony pilot plant completed
- Procurement underway with major equipment shipped to Port MacKenzie
- Pilot plant uses proprietary hydrometallurgical process for antimony trisulfide
- US$43.4 million Department of War funding supports near-term production
- Project execution phase initiated with construction readiness
Engineering Milestone Marks Shift to Execution
Nova Minerals Corp (ASX:NVA) has crossed a critical threshold in its Estelle antimony project, announcing the completion of engineering and design for its pilot processing plant in Alaska. This milestone transitions the project from planning to active execution, with procurement and construction readiness now underway.
CEO Christopher Gerteisen highlighted that the engineering work, based on extensive metallurgical testing and flowsheet development, positions the company ahead of schedule as it prepares for ore extraction and plant construction. The pilot plant aims to produce antimony trisulfide, a critical mineral with growing strategic importance, using a proprietary hydrometallurgical refining method.
Dual-Site Processing Strategy and Proprietary Technology
The pilot plant design is split between two locations: the Whiskey Bravo site, handling front-end crushing, screening, and ore sorting; and the Port MacKenzie facility, where beneficiation, refining, and product recovery will occur. Bulk samples from the Estelle claims will be processed initially at Whiskey Bravo before transport to Port MacKenzie for concentration and refining.
At Port MacKenzie, the proprietary cleaner hydrometallurgical process will refine the stibnite-bearing ore into a saleable antimony trisulfide product, which will then be filtered, dried, and bagged for shipment. This approach aims to optimize product quality and operational efficiency.
Procurement Accelerates with Strategic Equipment Acquisition
Procurement is progressing rapidly, with over 40 containers of major equipment en route to Port MacKenzie. Nova Minerals capitalized on the opportunity to acquire critical processing equipment from a recently decommissioned North American beneficiation circuit, including crushers, a ball mill, ore sorters, screens, flotation cells, and conveyors.
This strategic acquisition is expected to reduce lead times, lower capital expenditure, and streamline the transition from engineering to construction and operational readiness, underscoring the company’s focus on capital efficiency.
Funding Backed by US Department of War for Domestic Critical Minerals
The Estelle antimony project benefits from a US$43.4 million award from the U.S. Department of War, aimed at establishing a domestic supply chain for critical minerals. This funding underpins Nova Minerals’ target to commence near-term antimony production in late 2026 or 2027.
Antimony is considered essential for various industrial and defence applications, and Nova’s project is positioned within Alaska’s tier-one mining jurisdiction, adding geopolitical and supply chain significance to the development.
Forward-Looking Risks and Next Steps
While the project advances, Nova Minerals cautions that forward-looking statements are subject to typical risks including regulatory approvals, financing availability, operational execution, and commodity price fluctuations. The company is progressing toward ore extraction and plant construction, with further updates expected as the pilot plant moves closer to production.
Bottom Line?
Nova Minerals’ swift progress on the Estelle antimony pilot plant underscores its ambition to secure a critical domestic supply, but execution risks remain ahead of anticipated late 2026 production.
Questions in the middle?
- How will Nova manage potential regulatory and operational risks during construction?
- What impact will evolving antimony market dynamics have on project economics?
- How effectively can the proprietary hydrometallurgical process scale beyond pilot production?