World’s Largest Mining Project Begins Production in Guinea

West Africa WeeklyNovember 14, 20251 Mins read1k

Guinea has launched operations at the Simandou iron-ore mine, a $23 billion development widely described as the biggest mining project in the world. The milestone was marked at an official ceremony in Forécariah, where the Guinean president joined senior representatives from Rio Tinto, Chinalco, China Baowu and the Singapore-based firm WCS, the consortium driving the project.

Simandou, located in southeastern Guinea, has been at the centre of global interest for years because of its vast reserves of high-grade iron ore. Now in operation, the project is expected to export as much as 120 million tonnes annually. It is one of the most significant additions to the global steel supply chain in decades. The ore’s purity makes it especially valuable for low-carbon steelmaking, which has attracted significant Chinese investment.

Beyond the mine itself, Simandou includes over 600 kilometres of new railway, a transhipment port on the coast, and supporting infrastructure that cuts across several regions. Together, the developments form Africa’s most extensive greenfield mining and infrastructure project.

Guinea’s government has framed the launch as central to its long-term economic transformation plan. Officials estimate that revenues from the project could dramatically expand national income and position the country as a major player in global mineral supply. However, civil society groups and environmental advocates remain cautious, pointing to risks associated with deforestation, land displacement and the potential over-reliance on foreign-controlled ventures.

Still, the start of operations marks a turning point for a project that has faced years of delays, political disputes and shifting ownership. Guinea is betting that Simandou will redefine its economic future and reshape the global iron-ore market along the way.