The company states this grade is roughly three times the global average, though independent verification of that benchmark is not available in this reporting
Decision Lens
Almonty Industries has completed Phase 1 commissioning at its Sangdong Tungsten Mine in South Korea, restarting production at a site dormant since the early 1990s. For Mining Operations Directors, the operational architecture — underground development scale, processing plant configuration, and planned expansion sequencing — offers a reference point for how a long-suspended underground asset is being brought back to operating status. The broader significance is supply chain: if projections hold, Sangdong could become the dominant non-Chinese source of tungsten, a metal with direct applications in hard-rock drilling tooling, armor, and precision machining used across the mining industry.
90-Second Brief
This week, almonty Industries announced the completion of Phase 1 commissioning at the Sangdong underground tungsten mine in Gangwon Province, South Korea, marking the site’s first production in over 30 years. According to the company’s announcement, the Phase 1 processing plant is designed to handle approximately 640,000 tonnes of ore annually and yield around 2,300 tonnes of tungsten concentrate per year. A Phase 2 expansion, described as targeting approximately 1.2 million tonnes of annual processing capacity, is stated as planned for 2027. The company reports investing more than $100 million in redevelopment since acquiring the project in 2015, including approximately four kilometers of underground tunnel development and a newly constructed processing plant equipped with SAG and ball mills from Metso.
What’s Actually Happening
The Sangdong mine is an underground operation in South Korea that was historically among the world’s largest tungsten producers before commodity price conditions forced suspension in the early 1990s. Almonty acquired the asset in 2015 and has since executed what the company describes as a full redevelopment: underground access rehabilitation, tunnel extension, and construction of a new processing facility.
Phase 1 commissioning, as reported in the announcement, is now complete. The processing plant design specification — 640,000 tonnes of ore per year at an average stated grade of approximately 0.51% tungsten trioxide (WO₃) — represents a meaningful operational footprint for a single underground tungsten asset. The company states this grade is roughly three times the global average, though independent verification of that benchmark is not available in this reporting.
The processing configuration includes SAG and ball mills supplied by Metso, consistent with standard hard-rock mineral processing for fine-grained tungsten mineralogy. Advanced operational monitoring systems are described as part of the redevelopment, though specifics were not disclosed in the announcement.
The mine life is stated as exceeding 45 years, a figure that, if supported by reserve estimates, would place Sangdong among longer-duration underground assets in operation globally. The commissioning ceremony on March 17, 2026 included representation from South Korean government officials and the U.S. embassy in Seoul — an indication of the geopolitical weight attributed to the project by both governments.
Why It Matters for Mining Operations Directors?
Tungsten is a direct operational input for mining: it is the primary constituent of cemented carbide used in drill bits, cutting tools, and wear components across open-pit and underground mining operations. Any significant shift in non-Chinese tungsten supply has potential downstream implications for tooling supply chains and input costs.
The Sangdong commissioning is notable as a reference case for underground mine restart complexity. Redeveloping a suspended underground operation — including rehabilitation of access infrastructure, integration of modern processing plant equipment, and establishment of operating systems — over approximately a decade is a timeline that gives context to the capital intensity and execution risk involved in such projects.
The Phase 2 expansion plan, targeting doubled processing capacity by 2027, will be the operational test of whether Phase 1 ramp-up can be stabilized quickly enough to support parallel expansion execution. That sequencing — commissioning Phase 1 while planning a capacity doubling within roughly 18 months — carries execution risk that is not addressed in the announcement.
The company’s stated projection that Sangdong could supply over 80% of global non-China tungsten production at full capacity, and approximately 40% of total global non-China demand, is drawn from company materials and has not been independently verified in this reporting. These figures should be treated as projected, not confirmed.
The Forward View
The operational trajectory described involves three near-term milestones: Phase 1 ramp-up to design throughput, Phase 2 construction commencement, and the stated 2027 target for Phase 2 completion. Each carries execution risk. Processing plant ramp-ups from commissioning to design throughput routinely take longer than planned, particularly at newly constructed facilities processing an ore type that may require reagent and circuit optimization.
The broader strategic context is significant for medium-term planning. U.S. defense procurement requirements referenced in the announcement, mandating non-China tungsten sourcing after 2027, represent a demand signal that could shape tungsten pricing and availability for all buyers — including mining operations dependent on carbide tooling. If those procurement mandates are implemented as described, demand pressure on non-Chinese tungsten supply could tighten the market for commercial mining applications.
The adjacent Sangdong Molybdenum deposit and planned tungsten oxide refining facility described by Almonty as the “Korean Trinity” concept remain in the development stage. No commissioning timeline or capital commitment figures for these components were provided in the announcement.
Peer Moves
No comparable underground tungsten restart at this scale has been announced by peer operators in Western jurisdictions in the same period. Almonty’s Portuguese and Spanish operations represent smaller-scale tungsten production within the company’s portfolio, but Sangdong is described as the company’s flagship asset by a significant margin in terms of capacity and projected output.
What We’re Uncertain About?
Several material uncertainties apply to this announcement:
Ramp-up pace. No guidance was provided on the timeline from commissioning to steady-state design throughput. Actual ore tonnes processed, head grade, and tungsten concentrate produced in early operating months are not reported.
Phase 2 financing and execution. The 2027 timeline for Phase 2 capacity doubling is a company projection. No financing structure, engineering contractor, or equipment procurement status for Phase 2 was disclosed in this announcement.
Grade continuity. The stated average ore grade of 0.51% WO₃ is a project-level figure. Actual head grade in early production may vary from the reserve average, and no reconciliation data is yet available.
Market share projections. The claim that Sangdong will supply over 80% of non-China tungsten production at full capacity is a company projection based on current market structure. It assumes no significant new non-China supply enters the market before or during Sangdong’s Phase 2 ramp.
Tooling input cost implications. The downstream effect on carbide tooling prices and availability for mining operations will depend on market dynamics not yet established, including whether Almonty’s production is preferentially allocated to defense procurement or available for commercial markets.
One Question to Bring to Your Team
If non-Chinese tungsten supply tightens over the next 18 to 24 months as Sangdong ramps up and U.S. defense procurement mandates take effect, what is your current exposure on carbide tooling inventory, and do your maintenance contracts give you adequate price protection or supply priority?
Sources
- Theglobeandmail — Almonty Completes Phase 1 of Sangdong Tungsten Mine in South Korea (Link)
