Power crisis bites Guinea’s aluminium ambitions; 75kt supply to wait until after 2030

Guinea’s ambition to move beyond bauxite exports into alumina refining and aluminium smelting is running into a major electricity constraint. Producing about 1,000 MW of power at present, it needs another estimated 5,000–10,000 MW for industrialisation. While new alumina refineries could expand intermediate supply, the shortage of reliable electricity is likely to delay additional aluminium production capacity beyond 2030.

The challenge emerges as aluminium traded at USD 3,008.5 per tonne, down 8.77 per cent over the month but up 8.43 per cent year on year. Guinea mined an estimated 150 million tonnes of bauxite in 2025, accounting for 34 per cent of global output of 440 million tonnes. Yet it produced only 360,000 tonnes of alumina, or 0.24 per cent of worldwide production of 150 million tonnes, highlighting the gap between its mining strength and domestic refining capacity.  

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Guinea’s bauxite strength meets power supply gap

Guinea aims to establish five alumina refineries producing 7–8 million tonnes annually by 2030. Three refineries are under construction, while aluminium smelting remains a longer-term ambition. Alumina refining can operate using imported gas, coal or oil, but primary aluminium smelting requires a continuous and dependable electricity supply.

A 750,000-tonne-per-year smelter would consume around 14,821 kWh per tonne, equivalent to 11.1 TWh annually. Guinea’s largely hydropower-based electricity system currently exports power to Senegal, Gambia and Guinea-Bissau during rainy months, but imports from Ivory Coast or Senegal during the dry season. This seasonal imbalance limits the reliable supply available for new industrial projects.

The government is exploring gas, coal and nuclear power to support smelting. Without domestic coal resources, one proposal is to import coal from South Africa or Mozambique on ships that arrive to load bauxite. However, the need for uninterrupted power remains a fundamental hurdle as outages can freeze smelting pots and halt production.

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The heavy toll of power crisis on South Africa and Mozambique

Guinea’s difficulties reflect a wider African industrial challenge. South Africa, hosting over 70 per cent of established global chrome reserves, has fewer than 12 of its 66 ferrochrome smelters operating after power costs rose roughly tenfold since 2008. Daouda Diakite, senior adviser to Guinea’s mines minister, identified energy and infrastructure as the main obstacles to domestic mineral processing.

Electricity is also a major determinant of aluminium smelter margins, accounting for around 30 per cent of production costs. Plants with long-term, low-cost power contracts benefit more than those exposed to electricity grid or market rates, particularly when alumina prices fall. Alumina was quoted at USD 373 per tonne FOB Western Australia on October 8, 2026, a level that could favour smelters with secure, competitively priced electricity.

Power agreements are of key essence as evident in South32’s Mozal Aluminium operation in Mozambique. The company placed the Mozal aluminium smelter on care and maintenance around March 15, 2026, when its power contract was due to expire, after negotiations stalled and drought reduced hydropower supply. The planned shutdown carried one-off costs of about USD 60 million.  

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What the power gap means for future aluminium supply

Guinea has not set a timeline for potential bauxite export restrictions, while unexpected electricity tariff increases could threaten grid-dependent smelters. Moreover, if Guinea’s first-half (H1) bauxite exports drop below the 99.8 million tonnes year-on-year compared to 2025, expectations for lower alumina prices could be challenged.

The country’s proposed 150-million-tonne export restrictions, mining rights and tax holidays could encourage more domestic refining without adding an equivalent volume of aluminium metal.

Until reliable, affordable electricity becomes available at scale, Guinea’s bauxite advantage alone may not be enough to make new, sustainable aluminium smelting capacity live before 2030.