Alcoa gallium project at Wagerup: process-integration takeaways for engineers
Reviewed by Tom Sullivan

First reported on Australian Mining
30 Second Briefing
Construction has begun on the Alcoa–Sojitz gallium recovery project at Alcoa’s Wagerup alumina refinery in Western Australia, targeting extraction of gallium from existing Bayer process liquor to create a new critical-mineral stream. The plant will recover gallium as a by-product of alumina refining, positioning Australia as a larger global supplier of feedstock for gallium nitride and gallium arsenide used in semiconductors and defence electronics. For process engineers, the project signals growing value in retrofitting refineries to capture trace elements from legacy circuits.
Technical Brief
- Construction start indicates integration works must be sequenced around an operating refinery with minimal downtime.
- Similar retrofits to mature Bayer refineries could unlock multiple trace-element revenue streams without major new pits.
Our Take
The Wagerup Alumina Refinery gallium recovery project sits alongside Alcoa’s proposed $5.9 billion acquisition of South32’s aluminium and alumina assets, signalling a strategy to lock in both bulk alumina capacity and higher-margin critical minerals streams within Australia.
In our database of Mining–Projects coverage, gallium appears far less frequently than other critical minerals, so this Western Australia project positions Alcoa as one of the relatively few operators trying to commercialise gallium at scale from existing alumina circuits.
Japanese involvement in multiple Australian critical minerals projects, highlighted in the May 2026 piece on nickel and rare earths, suggests the Alcoa–Sojitz gallium initiative could be part of a broader Japanese effort to secure diversified non-Chinese supply of niche inputs like gallium from Western Australia.
Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.
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