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South32, Australia's South32, mothballs Mozal after failing to find affordable power

South32, an Australian diversified miner, announced on Monday that it had put its Mozal aluminum smelter in Mozambique under a 'care and maintenance' program on March 15.

The company claimed that it was unable to secure a sufficient and affordable supply of power for Mozal after March 2026. As a result, it placed the smelter in care and maintenance.

The Perth-based company and Mozambique’s government and energy suppliers have been negotiating for years in order to come up with an agreement that would allow the smelter to continue its energy-intensive operations.

South32 has been in discussions with Hidroelectrica de Cahora Bassa, a hydroelectric power'supplier owned by the Mozambique Government for over six years about a tariff that is set to expire on March 20, 2026.

Aluminium production is an energy-intensive process, so a reliable power supply for aluminium manufacturers such as South32 is a major concern.

Mozal, in which South32 has a stake of 63.7%, is a major contributor to the aluminium output for South32, accounting for just under 29% of total aluminium production by fiscal 2025.

South32 reported a $372-million impairment to the Mozal Smelter as part of its fiscal year 2025 results. This was due to the financial impact from the shutdown.

In a statement, the company stated that the alumina sold to Mozal by the?Worsley Alumina Refinery?will be sold to third-party customers at index linked prices.

(source: Reuters)