Aluminum is used in solar panel frames, electric vehicle structures, power transmission lines and battery housings. Primary aluminum production, however, is among the more carbon-intensive industrial processes. Producing one tonne of aluminum from bauxite ore can emit an estimated 11–12 tonnes of CO₂ equivalent, depending on the energy source.
Primary aluminum is produced using large electrochemical cells known as potlines. The Hall-Héroult process converts alumina into metal using electricity, with performance tied to cell design, temperature control, electrical stability and material performance.
Western smelter investment challenges and China’s production concentration
Building new smelting capacity in North America and Europe has been economically difficult over the past 15 years. The constraints cited include high industrial electricity costs, inconsistent carbon pricing frameworks, oversupply from global competitors and price pressure linked to large-scale production in Asia.
As a result, Western markets saw smelter closures without replacement capacity while investment shifted toward regions with cheaper coal-powered electricity. China accounts for roughly 60% of global primary aluminum production, much of it associated with high-carbon coal-fired power.
This concentration has been linked to vulnerabilities for manufacturers, including exposure to geopolitical and trade disruptions. It also raises Scope 3 emissions liabilities and can affect green procurement requirements in automotive and construction sectors, alongside volatility in global pricing and tariff policies.
Hydro-Québec electricity and Rio Tinto’s Complexe Arvida expansion
Quebec is described as offering low-cost, low-carbon electricity for aluminum smelting through Hydro-Québec’s hydroelectric network. The energy profile has supported aluminum production in the Saguenay–Lac-Saint-Jean region for more than a century. It is also positioned as enabling globally competitive low-carbon primary aluminum expansion.
Within that context, Rio Tinto’s expansion at its Complexe Arvida site is presented as the first significant increase in Western primary aluminum capacity in more than a decade. The project involves a US$1.5 billion investment focused on AP60 reduction cells.
AP60 technology details for potline operations
In the Hall-Héroult process, alumina is dissolved in molten cryolite. A powerful electric current passes through carbon anodes and cathodes while oxygen is separated from alumina, and liquid aluminum is collected at the bottom of each cell.
Rio Tinto’s AP60 technology is described as a next-generation smelting design developed through years of research. The system operates at around 600 kiloamperes, which is higher than many older smelters.
The AP60 design is associated with higher production output per cell and improved energy efficiency per tonne of aluminum. It also targets more stable thermal and electrochemical performance, along with reduced emissions intensity when powered by hydroelectricity.
Project scope: AP60 pots, capacity additions and scheduled retirements
The Complexe Arvida expansion includes 96 new AP60 reduction cells. It is expected to add approximately 160,000 tonnes per year of production capacity. After expansion, total AP60 output is targeted at about 220,000 tonnes annually.
The target completion date is end of 2026. Rio Tinto also plans retirement of legacy smelter capacity in June 2026, aligning closures with the introduction of the new potlines.
The closure of older potlines is described as part of the project’s environmental impact. Rio Tinto expects an approximate 290,000 tonnes of CO₂ equivalent per year reduction and up to a 90% reduction in particulate emissions in the region through replacing outdated technology with AP60 cells.
Construction workforce and regional economic activity in Saguenay
The expansion includes regional employment during construction and operations. More than 1,500 workers are involved during peak construction activity. Estimated provincial economic activity is reported at over $1 billion.
After completion, around 100 permanent operational jobs are expected. The Saguenay region has long depended on aluminum production as its industrial backbone, according to the project description.
Low-carbon aluminum demand drivers and verified emissions data
Demand for aluminum is described as rising due to electrification and infrastructure development. Buyers are also increasingly required to reduce carbon footprints across supply chains.
The demand drivers listed include electric vehicles and transport, where automakers use aluminum to reduce vehicle weight and extend EV range while lowering embedded emissions in materials. Green buildings and infrastructure are linked to certification systems such as LEED and BREEAM that push sourcing of low-carbon materials for structural applications and façade systems.
The same demand set includes energy and power systems tied to renewable grid expansion and EV charging networks that increase demand for aluminum conductors, enclosures and transmission components. Consumer packaging demand is also associated with tightened sustainability requirements responding to regulations on product lifecycle emissions.
A further market shift highlighted is the growing value of verified emissions data. Rio Tinto can offer auditable carbon intensity metrics, verified hydroelectric energy sourcing and traceable production processes per tonne of metal.
This approach is described as relevant to mandatory Scope 3 emissions reporting by buyers. Buyers are said to differentiate between high-carbon aluminum from coal-powered grids and low-carbon aluminum certified through renewable energy inputs.
Recycling integration within Quebec’s aluminum supply chain
The Quebec strategy also includes expansion into aluminum recycling infrastructure. Recycled aluminum requires up to 95% less energy than primary production, which lowers emissions compared with making metal from bauxite-derived inputs.
The integration of recycling with primary smelting is described as creating a circular supply chain for end-of-life materials. It also reduces dependence on raw bauxite and alumina inputs while lowering lifecycle emissions across product lines.
Sourcing concentration risks and implications for Western supply chains
The global industry remains heavily concentrated in China where coal-based electricity drives higher emissions intensity. This concentration raises strategic concerns for Western industries connected to national security, infrastructure and energy systems.
The priorities listed include supply chain diversification and domestic or allied production capacity. Governments and manufacturers are also described as prioritizing verified low-carbon sourcing standards to reduce exposure to geopolitical risk.
The Quebec expansion at Complexe Arvida is presented as adding secure, low-carbon aluminum capacity within North America through additional AP60 output based on hydroelectric power sourcing.
