HomeMiningAMERICAN TUNGSTEN & ANTIMONY (ASX:AT4)

Processing Bottleneck Relief Hinges on Dutch Mountain Mill Restart

Mining By Maxwell Dee 3 min read

American Tungsten & Antimony Ltd has begun a low-cost refurbishment of its Dutch Mountain tungsten mill in Utah, aiming to restart production swiftly and ease regional processing bottlenecks.

  • US$400,000 refurbishment underway at Dutch Mountain tungsten mill
  • Mill to process feedstock from historical Fraction Lode mine
  • Project manager Jack Webby appointed to oversee six-month works
  • Dutch Mountain is Utah’s only fully permitted tungsten processing facility
  • Exploration drilling planned to support resource expansion at Fraction Lode

Refurbishment Underway to Unlock Production

American Tungsten & Antimony Ltd (ASX:AT4) has officially commenced refurbishment of its Dutch Mountain tungsten processing mill in Utah, USA, with an estimated cost of US$400,000. The move follows the company’s acquisition of the project earlier this year and signals a determined push to restart tungsten production quickly to meet growing demand for this critical mineral.

The Dutch Mountain mill, located on private land and fully permitted at the state level, offers a rare advantage in the US mining landscape by bypassing lengthy federal permitting processes. This facility is the only operationally proven tungsten processing plant in Utah’s Clifton Mining District, a region known for its high-grade tungsten deposits that have long suffered from processing bottlenecks.

Strategic Importance of Dutch Mountain

The mill’s gravity separation circuit is optimised for coarse-grained scheelite, allowing it to produce tungsten concentrate without complex flotation reagents. Historically, the mill processed ore from the Fraction Lode mine as recently as 2017, validating its flowsheet under real operating conditions. American Tungsten plans to resume processing using feedstock from Fraction Lode, which is part of the broader Dutch Mountain project portfolio.

Refurbishment activities include plant cleanup, equipment relocation, installation of new cyclones, refurbished crushers and sorters, and electrical rewiring. The company expects these works to take approximately six months, overseen by newly appointed project manager Jack Webby, who brings a decade of mining sector experience and technical expertise.

Exploration to Support Future Growth

Complementing the refurbishment, AT4 has submitted a Notice of Intent to the Bureau of Land Management to begin exploration drilling at the Fraction Lode mine. This drilling program aims to confirm and extend known tungsten mineralisation, providing critical geological data to underpin future resource definition and development.

Managing Director Andre Booyzen emphasised the strategic value of the project, noting that restarting the mill will help alleviate a longstanding processing bottleneck in the region and is a key step towards regional consolidation and capacity expansion. The company’s broader vision is to become a vertically integrated, conflict-free supplier of critical minerals to Western economies, with Dutch Mountain playing a pivotal role.

As global demand for tungsten intensifies, particularly in the US where supply chain security is a priority, the successful refurbishment and ramp-up of Dutch Mountain could position American Tungsten as a vital player in the critical minerals sector.

Bottom Line?

With refurbishment underway and exploration poised to expand resources, American Tungsten is set to reshape tungsten supply dynamics in Utah.

Questions in the middle?

  • Will the refurbishment stay on schedule and within the US$400,000 budget?
  • How quickly can feedstock from Fraction Lode be ramped up to sustain mill operations?
  • What are the potential resource upgrades from the upcoming drilling program?