For instance, Rio Tinto Alcan said it plans to close its U.K.-based Lynemouth smelter.

FORBES: Some Aluminum Production Dips Below Costs; Output Cuts Likely If Condition Persists

Anglesey Aluminium is jointly owned by Rio Tinto Alcan and Kaiser Aluminium and was formed in 1971.

BBC: Anglesey Aluminium

Rio Tinto Alcan is currently holding a 90-day consultation with workers at the plant, which opened in 1972.

BBC: Alcan plant at Lynemouth

Rio Tinto Alcan announced last week it was planning to close its Lynemouth factory with the loss of 515 jobs.

BBC: Alcan plant at Lynemouth

Rio Tinto Alcan chief executive Jacynth Cote said the smelting plant was no longer a "sustainable business" because of spiralling energy costs.

BBC: Alcan plant at Lynemouth

In other news, shares in Alcoa moved dramatically after news of the purchase of Canadian aluminum producer Alcan by London-based Rio Tinto, staging an 8.6% rally Thursday through the stock's all-time high set in 2001.

FORBES: Magazine Article