Sherritt Nickel-Cobalt Refinery Shutdown Exposes Cuba Feedstock Risk

Sherritt

Sherritt nickel cobalt refinery operations at Fort Saskatchewan in Alberta will enter a shutdown state after feedstock from the company’s Moa joint venture in Cuba became unavailable.

Sherritt nickel cobalt refinery production depends on mixed sulfide precipitate shipped from the Moa mine, where nickel and cobalt ore is mined and processed before final refining in Canada.

Sherritt nickel cobalt refinery shutdown highlights the vulnerability of processing facilities that rely on a single international feed source. The company has not provided a timeline for restarting nickel and cobalt refining.

The shutdown follows fuel-related disruptions at Moa and increased US sanctions on Cuba, which led Sherritt to suspend its direct participation in the joint venture.

Cuba Disruption Breaks the Mine-to-Refinery Supply Chain

The Moa joint venture is owned equally by Sherritt and Cuba’s General Nickel Company. Its operating model links Cuban mining and intermediate processing directly with Canadian refining.

Ore from Moa is processed into mixed sulfide precipitate before shipment to Fort Saskatchewan for conversion into finished nickel and cobalt products.

That structure becomes vulnerable when upstream operations stop. Sherritt had already warned that existing refinery feed inventories would last only until around mid-June.

Fuel shortages initially forced the Moa operation to suspend mining activity in February. Additional uncertainty followed after the US expanded sanctions on Cuba, prompting Sherritt to suspend its direct participation in the joint venture in May.

The refinery will remain shut until Moa mining and processing resume and enough intermediate material is available to rebuild feed supply.

This shows that refining capacity alone does not guarantee critical mineral security. A plant can remain technically capable of producing metal while geopolitical or logistical problems interrupt the upstream feed required to operate it.

Nickel and Cobalt Output Stops While Byproduct Production Continues

Sherritt will use the shutdown period to carry out maintenance at Fort Saskatchewan.

The company will continue producing fertilizer and sulfuric acid, showing that some parts of the industrial complex can remain operational even while nickel and cobalt refining is suspended.

However, the loss of finished nickel and cobalt output reduces North American availability of two important materials used across stainless steel, superalloys, batteries and other industrial applications.

Cobalt is particularly relevant to aerospace, defence and battery supply chains, while refined nickel remains important for both conventional metallurgy and selected battery chemistries.

The disruption also underlines the strategic importance of diversified feedstock. Refiners that can process material from multiple mines or jurisdictions have greater resilience when one supply route fails.

For Sherritt, the key issue is therefore not refinery maintenance but restoration of a stable Cuban feed stream.

The Metalnomist Commentary

Fort Saskatchewan shows that midstream capacity is only as secure as its upstream feed. North American critical minerals policy must address concentrate and intermediate supply alongside domestic refining capacity.