First Quantum Minerals said its newly expanded Kansanshi copper mine in Zambia is expected to process about 27 million tonnes of ore in 2026, around 8 percent above the design capacity of the S3 expansion. The 1.2 billion dollar expansion, commissioned in August 2025, added a processing line built to handle 25 million tonnes of sulphide ore a year, and the company cited strong plant uptime and milling performance for the expected overrun.
Throughput above nameplate typically lifts copper output without adding much fixed overhead, which improves unit economics. The trade off is ore quality: extra headroom lets the mine feed more lower grade ore, which steadies production when grades slip but can raise the cost per tonne of metal because more rock must be processed for each tonne of copper. Analyst attention is therefore likely to sit on costs as much as on the mine’s roughly 277,000 tonne a year production profile.
The mine’s weight in the group is unusually high. Zambia delivered about 93 percent of First Quantum’s 2025 copper output after the Cobre Panama mine in Panama was suspended in 2023, and Kansanshi, owned 80 percent by First Quantum, is Africa’s largest integrated copper processing operation, with smelter capacity of 1.6 million tonnes a year after the expansion.
For Zambia, sustained above design operation is the kind of incremental evidence its national target needs. The country produced 890,346 tonnes of copper last year against a target of 3 million tonnes a year by 2031, a gap that can only close if expansions at Kansanshi, Lumwana and Konkola all deliver at or above plan.