Key Takeaways:
China produced a record 45 million tonnes of primary aluminum in 2025, yet sectoral carbon emissions may still be peaking as cleaner power and recycling outpace output growth.
China's aluminum sector produced a record 45.02 million tonnes of primary metal in 2025, up 2.4 percent from a year earlier, yet sectoral carbon emissions may still be peaking as cleaner electricity and recycling outpace output growth.
"A peak while production remains near record levels means the production system itself is getting cleaner fast enough to break the historical relationship between industrial output and emissions," said Michael Barnard, chief strategist at TFIE Strategy.
Output kept climbing into 2026, with 23.19 million tonnes produced in the first half, up 3.8 percent year over year. Clean energy supplied about 25 percent of the energy used by electrolytic aluminum in 2024, while average AC electricity consumption fell roughly 2 percent from 2020 levels, according to China's Ministry of Industry and Information Technology. The government's 2025-2027 aluminum plan pushes the clean-energy share above 30 percent and calls for continued upgrading or retirement of inefficient capacity.
The stakes extend well beyond one metal. Aluminum smelting is among the most electricity-intensive industrial processes, so the power source determines whether China can decouple industrial output from emissions. For years the shorthand was that smelters were migrating from coal-heavy northern provinces to hydropower-rich Yunnan and Sichuan. That shift helped, but it no longer tells the whole story — northern and northwestern China are now major wind and solar development regions themselves.
Cleaner Power, Not Just Relocation
The useful measure is increasingly the carbon intensity of the electricity delivered to each smelter, not whether the province gets labeled "coal" or "hydro." China is encouraging producers to buy renewables directly, invest in storage, and squeeze more efficiency out of the electrolysis process. That matters because purchased electricity and heat are excluded from the national emissions trading system that aluminum, steel, and cement entered in 2025.
The ETS currently covers direct CO₂ emissions and the potent perfluorocarbons produced during smelting, but not the electricity smelters buy. For aluminum, that is a large qualification — grid decarbonization and clean-power procurement matter more right now than the simple fact that smelters have entered the carbon market.
Recycling Adds a Second Lever
Recycling provides another large lever. China produced roughly 10.5 million tonnes of secondary aluminum in 2024 and is targeting more than 15 million tonnes by 2027. That does not mean an extra 4.5 million tonnes of recycled metal simply knocks the same amount off primary production — scrap availability depends on product lifetimes, collection systems, alloys, and quality requirements. But decades of putting aluminum into vehicles, buildings, and infrastructure mean more of that stock is now returning as scrap, letting secondary supply take a growing share of a still-large market.
The next few years should reveal which effect wins. If China's aluminum emissions peak while output sits around record levels, it would show a huge industrial sector can keep supplying more material while changing electricity, efficiency, and circularity enough to push absolute emissions downward. That would be a more consequential result than simply hitting a production ceiling.
This article is for informational purposes only and does not constitute investment advice.
