Guinea bauxite

What it is

Bauxite is the sedimentary rock ore from which alumina (aluminium oxide) is refined, and alumina is then smelted into primary aluminium. The Republic of Guinea (West Africa) holds the world's largest bauxite reserves, estimated at approximately 7.4 billion tonnes as of 2026, representing roughly 26% of known global reserves. The Boké region in Guinea's northwest contains the principal deposits, all within roughly 100 kilometres of the Atlantic coast, reducing transport costs for export. Three producers dominate output: Compagnie des Bauxites de Guinée (CBG), which has worked the Sangarédi deposit since 1963 and is 49% owned by the Guinean state with 51% held by Halco Mining (Alcoa, Rio Tinto, Dadco Investments); Société Minière de Boké (SMB-Winning), a Sino-Singaporean consortium that became the largest single producer by volume by 2023; and Winning Consortium Simandou, which also operates in the Boké corridor.

History

Guinea began commercial bauxite extraction in 1963, when CBG opened the Sangarédi mine and built a dedicated export terminal at Kamsar on the Atlantic coast. Output grew through the 1970s and 1980s to serve European and North American aluminium smelters under long-term contracts. The industry's scale accelerated sharply from 2015 as Chinese demand drove an aggressive expansion of concessions, most awarded under President Alpha Condé (in office 2010 to 2021). By 2022, Guinea had surpassed Australia to become the world's leading bauxite exporter by tonnage. In September 2021, Colonel Mamadi Doumbouya's military junta removed Condé in a coup, citing mismanagement of natural-resource revenues. The Doumbouya government initiated a broad review of legacy mining contracts, introduced a bauxite reference price of approximately US$50 per tonne in September 2022, and since has renegotiated or suspended multiple legacy concessions, escalating to a formal export cap of 150 million tonnes per year in June 2026.

Current state

As of mid-2026, Guinea exported 182 million tonnes of bauxite in 2025, up roughly 23% year-on-year, supplying approximately 74 to 75% of China's total bauxite imports. The June 2026 export cap, set at 150 million tonnes per year under Ministerial Order 2026/MMG/CAB/0447, cuts roughly 25% from the 2025 run-rate and applies to all concession holders. Chalco, a subsidiary of China's state-owned Aluminium Corporation of China, opened a US$1 billion alumina refinery at Boffa in June 2026 with 1 million tonnes per year of alumina capacity. Since Guinea's export restriction covers only bauxite ore and not processed alumina, Chalco's refinery output is structurally exempt. The May 2026 EGA settlement resolved a standoff in which Guinea suspended supply to Emirates Global Aluminium's Al Taweelah refinery in Abu Dhabi, transferring the Sangarédi project assets to the Guinean-controlled Nimba Mining Company while restoring supply under revised commercial terms.

Relationships

China is Guinea's overwhelmingly dominant buyer, receiving roughly 75% of exports and holding significant stakes in producing entities through SMB-Winning and Winning Consortium. The UAE, through Emirates Global Aluminium's Al Taweelah refinery in Abu Dhabi, is the leading non-Chinese industrial buyer. Australia (Rio Tinto Weipa, South32) and Brazil are the main alternative bauxite sources for global smelters, but neither can substitute Guinean supply at 12-month notice given the volume differential. The World Bank's International Centre for Settlement of Investment Disputes is an increasingly active forum for Guinea mining disputes: Axis International filed a US$28.9 billion claim against Guinea in March 2026 following permit revocations in the Boké region, the largest known investment claim against the Guinean state.

What to watch

• Enforcement and quota allocation of the 150 million tonne annual export cap, and whether Chinese-backed concessions receive preferential treatment over CBG and Western-held concessions.
• The Axis International ICSID arbitration: Guinea's counter-memorial is due September 2026, which will clarify the Doumbouya government's legal theory on permit revocations under the UK-Guinea bilateral investment treaty.
• Chalco Boffa Phase 2: the planned expansion to 2 million tonnes per year of alumina by 2028, and whether other investors replicate the in-country refining model to secure exemption from the ore export cap.
• Guinea's political calendar: the Doumbouya transitional government has repeatedly committed to elections, and a change of administration could alter mineral-policy direction.
• Global bauxite spot prices: whether the export cap reverses the roughly 50% price decline from early-2025 peaks.