American Tungsten and Antimony Announces Study for Tungsten Production at Del Sol Refinery in Nevada

Rhea-AI Summary

American Tungsten and Antimony (OTCQX: ATALF) has engaged Metso Finland Oy to complete a FEL1-level Scoping Study for an ammonium paratungstate (APT) production circuit at the Del Sol Refinery in Amargosa Valley, Nevada. The study is based on a proposed Phase 1 design capacity of 2,500 tons per annum of tungsten APT and will outline a potential Phase 2 modular expansion to 5,000 tons per annum.

According to American Tungsten and Antimony, installing an APT circuit within the existing, constructed and permitted Del Sol hydrometallurgical antimony plant could lower capital needs and shorten the timeline to domestic tungsten production. The company has announced a Share and Purchase Agreement to acquire 100% of the Del Sol Refinery and the White Spar Antimony Mine, complementing its antimony and tungsten project portfolio across Utah, Nevada and Arizona, and aligning with July 2026 U.S. Executive Order 14415 favoring domestic sourcing of critical minerals.

Positive

• Engaged Metso Finland Oy for FEL1 Scoping Study on APT circuit
• Phase 1 tungsten APT design capacity of 2,500 tons per annum
• Potential Phase 2 expansion pathway to 5,000 tons per annum
• Plan to use existing Del Sol plant footprint to reduce capital and timing
• Share and Purchase Agreement to acquire 100% of Del Sol Refinery and White Spar mine
• Portfolio of multiple antimony and tungsten projects in Utah, Nevada and Arizona

Negative

• None.

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NEW YORK, Sept. 1, 2026 /PRNewswire/ -- American Tungsten & Antimony, Ltd., (ASX: AT4; OTCQX: ATALF) announced it has engaged Metso Finland Oy to complete a Scoping Study at FEL1 Concept Study level, for an ammonium paratungstate (SPT) production circuit at the Del Sol Refinery in Amargosa Valley, Nevada.

The study is to be predicated on a proposed Phase 1 design capacity of 2,500 tons per annum of Tungsten APT and will propose a pathway to a potential future Phase 2 modular expansion to 5,000 tons per annum. Specific details on the study are available here: https://cdn-api.markitdigital.com/apiman-gateway/ASX/asx-research/1.0/file/2924-03129771-6A1341528&v=undefined.

"Tungsten is one of the most strategic commodities for the United States," said Casper Adson, CEO, of AT4. He noted that defense, aerospace and industrial manufacturing currently require supply chains that are offshore, a concern to national security. "Rebuilding the ability to convert tungsten concentrate into tungsten APT on domestically is a question of national interest to the U.S. government," he said.

American Tungsten & Antimony announced its intention to acquire Del Sol, a constructed and permitted hydrometallurgical plant for antimony, in July of this year. "Putting an APT circuit inside an existing footprint rather than building on a greenfield site has the potential to materially reduce the capital required and the timetable to commence production of a domestic tungsten product," Adson explained. He added that this capability is also one that will be attractive to U.S. government funding entities.

In July 2026, an Executive Order (#14415) was signed that requires US defense contractors and their subcontractors to source covered materials domestically or from allied nations and restricts the availability of waivers as of January 1, 2027, and further states that a contractor's failure to qualify a domestic source will not constitute non-availability unless active and adequately funded qualification efforts are underway.

American Tungsten and Antimony Ltd. (https://mwww.ataa.com) continues to advance a portfolio of antimony and tungsten projects in Utah and Nevada. Both minerals are designed as critical to U.S. security, defense and advanced manufacturing. The company's portfolio includes the flagship Antimony Canyon Project in Utah, together with a portfolio of tungsten projects across Utah and Nevada, including Tennessee Mountain, Fraction Lode, Nightengale, Sage Hen and Dutch Mountain. In late July of this year the company announced a Share and Purchase Agreement to acquire 100% of the Del Sol Refinery in Nevada and the White Spar Antimony Mine in Arizona.

View original content:https://www.prnewswire.com/news-releases/american-tungsten-and-antimony-announces-study-for-tungsten-production-at-del-sol-refinery-in-nevada-302866335.html

SOURCE American Tungsten and Antimony

FAQ

What did American Tungsten and Antimony (ATALF) announce on September 1, 2026 about the Del Sol Refinery?

American Tungsten and Antimony announced it engaged Metso Finland Oy to perform a FEL1 Scoping Study for an ammonium paratungstate circuit at the Del Sol Refinery. According to American Tungsten and Antimony, this study will define an initial 2,500 tons per annum tungsten APT production design and expansion pathway.

What is the planned tungsten APT production capacity at Del Sol Refinery for ATALF?

The planned Phase 1 design capacity is 2,500 tons per annum of tungsten APT, with a potential modular expansion to 5,000 tons per annum. According to American Tungsten and Antimony, these capacities will be evaluated in the FEL1-level Scoping Study with Metso Finland Oy.

How does U.S. Executive Order 14415 impact American Tungsten and Antimony (ATALF)?

Executive Order 14415 requires U.S. defense contractors to source covered materials domestically or from allies starting January 1, 2027. According to American Tungsten and Antimony, domestic tungsten APT and antimony capabilities could support these supply chain needs and make its projects attractive to U.S. government funding entities.

Which assets is American Tungsten and Antimony acquiring alongside the Del Sol Refinery in 2026?

In late July 2026, the company announced a Share and Purchase Agreement to acquire 100% of the Del Sol Refinery in Nevada and the White Spar Antimony Mine in Arizona. According to American Tungsten and Antimony, these acquisitions complement its existing critical mineral projects.

Where are American Tungsten and Antimony’s main antimony and tungsten projects located?

The company’s portfolio includes antimony and tungsten projects in Utah, Nevada and Arizona. According to American Tungsten and Antimony, key assets include the Antimony Canyon Project in Utah and tungsten projects such as Tennessee Mountain, Fraction Lode, Nightengale, Sage Hen and Dutch Mountain.

Why is American Tungsten and Antimony adding an APT circuit to the Del Sol Refinery?

The company aims to convert tungsten concentrate into domestic tungsten APT using Del Sol’s existing permitted footprint. According to American Tungsten and Antimony, this approach may reduce required capital, shorten time to production and support U.S. national security supply chain priorities.