Guinea Simandou Integrated Project start of operations — 120 Mtpa iron-ore mine, TransGuinéen rail, and Forécariah port

Mechanism

The 11 November 2025 ceremony marked the transition from construction/commissioning to active operations for both mine blocs. WCS (Blocks 1–2) and SimFer (Blocks 3–4) had each independently commenced transporting ore from the Simandou range to the Forécariah port via the 622 km TransGuinéen railway by the time of the ceremony. First commercial export followed in late November 2025, with a ~200,000-tonne Baowu-consigned cargo departing Guinea and docking at Port Majishan, Zhejiang on 17 January 2026.

The integrated project is the direct operational materialisation of the three JV conventions ratified by Guinea's CNT on 3 February 2024 (2024-02-03-guinea-simandou-iron-ore-jv-conventions), which had remained the paper instrument. This filing captures the commencement-of-operations milestone — structurally distinct from the 2024 ratification.

Ownership structure at launch

Scale in context

• 120 Mt/yr combined design capacity: larger than Anglo American's entire 2024 iron-ore output and roughly 8% of 2024 seaborne trade.
• High grade (~65% Fe): Simandou ore blends directly into Chinese blast-furnace burden, reducing coke consumption vs. lower-grade Australian DSO. This commands a structural premium.
• Sinter-feed displacement risk: Australian mid-grade producers (BHP, FMG) and Brazilian Carajás fines face a permanent market-share and price-premium headwind at full ramp.

Downstream implications

• China's iron-ore concentration risk materially reduced. Prior to Simandou, China sourced ~60% of seaborne ore from Australia (BHP, Rio, FMG). A 120 Mt/yr African alternative, majority Chinese-invested, reduces strategic exposure without triggering Western supply-chain scrutiny.
• Guinea's fiscal position transforms. At $90/t iron-ore and 120 Mt/yr, gross export revenue approaches $11bn/yr — comparable to Guinea's entire 2023 GDP (~$21bn). The government holds 15% of CTG (infrastructure royalty stream) plus conventional royalty on ore.
• Rail multi-use clause carries strategic optionality. The TransGuinéen railway is designed for multi-use (ore, passengers, freight). This positions Guinea as a regional infrastructure node connecting the Simandou interior to coastal ports, potentially integrating landlocked neighbours (Sierra Leone, Mali corridor).
• Rio Tinto's China exposure shifts. SimFer's Chinalco JV (47%) means Rio Tinto is delivering Chinese-state-owned entity value on a Chinese-state-financed asset via a Chinese-consigned commodity. Rio retains operational management but strategic upside is partly socialised with a FEOC partner.

Open questions

• Ramp timeline: guidance at commissioning was multi-year ramp to full 120 Mt/yr; actual throughput by end-2026 is a key datapoint.
• WCS offtake contract structure: not publicly disclosed; presumed Baowu/Hongqiao captive offtake for the 49%-holder bloc.
• Iron-ore price pass-through: a large initial cargo at $90/t; if Chinese steel demand weakens sharply, project economics are sensitive (breakeven estimates ~$55–60/t on most analyses).
• Guinea Transition government stability: President Doumbouya's junta remains unelected; contract-stability risk is non-zero if political transition accelerates.