Rio Tinto Expands Amrun Bauxite Capacity with Kangwinan Project

Kangwinan

Amrun Mine Expansion Aims to Offset Upcoming Closures

Rio Tinto plans to boost its Australian bauxite output by developing the Kangwinan project alongside its Amrun bauxite mine. The expansion will support long-term supply as the Gove and Andoom mines are scheduled to shut around 2030. Rio Tinto confirmed the final investment decision for Kangwinan is expected in 2026, with production starting in 2029.

Kangwinan will add up to 20mn t/yr, complementing the 23mn t/yr already produced at Amrun in northern Queensland. Earlier this year, Rio Tinto ran Amrun above capacity, achieving 15mn t in Q1 2025. The expansion includes port upgrades and will help replace output lost from the 13mn t/yr Gove and Andoom mines.

ESG Compliance and Renewable Energy Integration

Rio Tinto is under growing pressure to meet Australia's reformed safeguard mechanism compliance targets. Weipa operations emitted 270,463t CO₂e in 2023–24, surpassing the baseline and prompting surrender of 14,025 carbon credits. To cut emissions, Rio Tinto launched a solar and battery project at Amrun, aiming to reduce diesel electricity by 37%.

The renewable system is projected to lower Amrun’s carbon output by 14,000t CO₂e annually. This aligns with Rio Tinto's broader ESG and decarbonization commitments across its global mining operations.

The Metalnomist Commentary

Rio Tinto’s expansion at Amrun reinforces Australia's role in global bauxite supply amid tightening ESG mandates. The Kangwinan project reflects a strategic pivot toward cleaner, long-term operations as legacy mines near closure. Bauxite's role in decarbonized aluminum production is becoming increasingly vital in global energy transition strategies.