US sanctions shut Canada’s only cobalt refinery: supply and risk notes for mine planners
Reviewed by Joe Ashwell
First reported on MINING.com
30 Second Briefing
US sanctions on Cuba have forced Sherritt International to shut its Fort Saskatchewan refinery, Canada’s only cobalt refinery, after feedstock from the Moa nickel-cobalt joint venture in eastern Cuba was cut off. The Alberta plant, which processed Cuban mixed sulphides into refined nickel and cobalt, is being placed in a safe idle state with core staff retained while Sherritt preserves cash and undertakes maintenance. Operations will remain suspended indefinitely, with only fertiliser and sulphuric acid production continuing to generate limited revenue.
Technical Brief
- Shutdown procedures at Fort Saskatchewan focus on maintaining the plant in a “safe and secure state”.
- Core personnel are being retained specifically to manage safety, security and essential maintenance during idling.
- Transition timing was constrained by remaining mixed sulphide inventory, with operations planned only until mid-June.
- Feed disruption stems from Sherritt’s suspended participation in the Moa nickel-cobalt joint venture in eastern Cuba.
- Refinery restart is explicitly contingent on Moa mining and processing resuming and the feed pipeline being re-established.
- Fertiliser and sulphuric acid circuits continue operating, implying segregation of process, utilities and safety systems from cobalt/nickel lines.
- Cash preservation and cost management are guiding maintenance scope, likely prioritising integrity, containment and environmental protection assets.
- For similar hydrometallurgical facilities, the case underlines the need for defined safe-idle procedures for geopolitical supply shocks.
Our Take
Our database shows multiple May 2026 items on Sherritt International’s Moa nickel‑cobalt joint venture in Cuba, so the Fort Saskatchewan refinery shutdown effectively removes the main Western processing outlet for that JV material just weeks after Sherritt opted to retain those assets.
The earlier May 7 coverage of a sharp share price drop for Sherritt tied to suspended Cuban JV participation suggests that the US sanctions environment is now driving both upstream (Moa, Energas SA) and downstream (Fort Saskatchewan) disruption, complicating long‑term planning for any Cuba-exposed cobalt and nickel flows into the US and Canada.
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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