Where does aluminum come from?

Aluminum reaches the market through three separate industries in three sets of countries. Bauxite is mined, alumina (aluminum oxide) is refined from it, and primary aluminum is smelted from alumina with electricity. Production on this page means primary metal from smelters, unless bauxite or alumina is named; recycled metal is counted separately by the industry. In 2025 China smelted 45 million tonnes of primary aluminum, 61% of the world's 74 million tonnes (USGS MCS). India and Russia were next, and the top five smelting countries made 80% of the total. World smelter output changed not available for a ten-year span in this source over the ten years to 2025, nearly all of it in Asia.

Smelting goes where electricity is cheap and reliable, because a tonne of metal takes roughly 14 megawatt-hours of power. China built its smelters on coal in Shandong, Xinjiang and Inner Mongolia and has been shifting them to hydropower in Yunnan. The Gulf states smelt on gas, Canada, Norway and Iceland on hydro, Russia on Siberian hydro, and India on coal. Power contracts, not ore, decide where the metal is made.

Bauxite is a different map. The ore forms by intense weathering in hot, wet climates, so the largest deposits are laterites in Guinea, northern Australia, Brazil, Jamaica, India, Indonesia and Vietnam. Alumina refineries sit either at the mine, as in Australia and Brazil, or near the smelters, as in China, which imports most of its bauxite by sea. The country-level tables for bauxite mining and alumina refining are not carried on this page, but the trade tables below show the same pattern from the export side.

Bauxite reserves stood at 29 billion tonnes in 2025, with Guinea holding 26%, followed by Australia and Vietnam (USGS MCS). These are reserves of ore, not of metal; roughly four to five tonnes of bauxite make two tonnes of alumina, which makes one tonne of aluminum. Bauxite is abundant relative to demand, so reserves are rarely the constraint.

The three stages of the chain trade separately. The primary line on this page is unwrought aluminum (HS 7601), the ingot, billet and slab that leaves a smelter. In 2024 Canada was the largest exporter, with 10% of the world's $79.3 billion of exports (CEPII BACI), and United States was the largest importer with 14% of world imports. China, which makes more primary metal than every other country combined, exports very little of it because of a 15% export tax on unwrought aluminum; it exports semi-finished products such as sheet, foil and extrusions instead. The unwrought table therefore describes the Gulf, Russia, Canada, India, Norway and Australia selling to the United States, Europe, Japan and South Korea.

Upstream, the trade in ore and intermediate is even more concentrated. Guinea was the largest exporter of bauxite (HS 2606) in 2024, and Australia the largest exporter of alumina (HS 2818) (CEPII BACI). Guinea sells almost all of its bauxite to China, Australia exports both bauxite and alumina, and China imports bauxite to feed refineries that in turn feed its smelters. Indonesia stopped exporting bauxite in June 2023 to force refining at home, which pushed China further toward Guinea.

Aluminum is priced on the London Metal Exchange. The LME Aluminium contract (ticker AH) trades in 25 t lots quoted in US$/t and settles by delivery of high-grade primary ingot, T-bar or sow into an LME-approved warehouse. The exchange quotes a cash price for delivery in two days and a three-month price, and the spread between them shows whether nearby metal is tight. The Shanghai Futures Exchange contract in yuan prices the Chinese domestic market, and the gap between Shanghai and London, after the export tax and value-added tax, drives the flow of semi-finished products out of China.

Physical buyers pay the LME price plus a regional premium: the Midwest premium in the United States, the Rotterdam duty-paid and duty-unpaid premiums in Europe, and the Main Japanese Ports premium in Asia. These premiums cover freight, financing and duties, and they move on their own. US tariffs under Section 232 pushed the Midwest premium to records in 2025 because the duty applies to imported metal and domestic smelters cannot meet demand. Alumina is priced separately by index, quoted free on board Australia, and long-term bauxite contracts are priced against delivered China assessments. LME warehouse rules also matter: between 2010 and 2015, queues of up to two years to load metal out of Detroit and Vlissingen warehouses inflated premiums until the exchange reformed its load-out rules.

The series charted here is LME cash, high grade. In August 2026 it averaged $3,251/t, up 25% from a year earlier (World Bank Pink Sheet). The nominal record was $3,666/t in May 2026, and in inflation-adjusted terms the high was $9,512/t in June 1988. The lowest monthly average since the series began in 1960 was $496/t in March 1962.

China set a ceiling of 45 million tonnes a year on primary smelting capacity in 2017 to limit coal burning and grid strain, and its output has run close to that ceiling since. Because China is more than half of world production, a cap on Chinese growth means new supply must come from India, Indonesia and the Gulf, which takes years. Within the cap, hydropower shortages in Yunnan during dry seasons force smelters to cut runs, tightening the market for months at a time.

Power is a third or more of a smelter's cost, so energy prices decide which smelters run. Europe's gas and power price spike in 2021 and 2022 idled a large share of the continent's smelting, and some of it has not returned. Smelters cannot be switched on and off cheaply; restarting a potline takes months and capital, so closures remove supply for years. Regions with cheap hydro or gas, and increasingly with dedicated renewable contracts, gain capacity when others lose it.

Guinea supplies about a quarter of the world's bauxite and roughly half of China's imports, so politics in Conakry reach the metal price. The coup of September 2021 and later disputes over mining licenses and export permits have each lifted bauxite and alumina prices, and alumina shortages in 2024 pushed the alumina index to records. Because Chinese refineries hold months of bauxite stock, the effect is usually delayed rather than immediate.

Vehicles, buildings and packaging take most of the metal. Aluminum use in cars rises as automakers cut weight, and electric vehicles use more of it in bodies and battery enclosures even though they use less in engines. Construction demand tracks the building cycle in China, Europe and the United States, and beverage cans give a steady base. Solar panel frames and transmission cables have become a large new source of demand as grids and renewable capacity expand.

Trade measures move regional premiums more than the LME price. The US Section 232 tariff on aluminum rose from 10% in 2018 to 25% in February 2025 and 50% in June 2025, and each step lifted the Midwest premium. US sanctions on Rusal in April 2018 removed the second-largest producer from western markets for nine months and sent the LME price to a seven-year high, then reversed it when they were lifted. Bans on Russian metal in LME warehouses after 2022 changed which metal is deliverable, which affects the exchange price directly.

Remelting scrap uses about 5% of the energy of primary smelting, so recycled aluminum is the cheapest source of metal and its share rises with the price of primary. Old scrap from cars, buildings and cans competes with primary ingot in castings and extrusions, and secondary billet is a growing substitute. When primary prices are high, scrap spreads narrow and secondary producers raise output; when they fall, scrap is held back. Trade restrictions on scrap, especially Chinese import rules, shift this balance across borders.

Aluminum is priced in dollars, and a weaker dollar tends to lift the price for dollar-based buyers while lowering it for others. Low interest rates make it cheap to finance metal in warehouses, which supports the cash-and-carry trades that lock up inventory and keep the forward curve in contango. When rates rise, financed stocks are released and the market loosens. Fund positioning on the LME and in Shanghai can amplify short-term moves in either direction.

Bauxite is mined in shallow open pits by stripping the topsoil and digging the ore with excavators; the ore is crushed, sometimes washed, and either shipped as it is or fed into a nearby refinery. The Bayer process, patented in 1888, dissolves the ore in hot caustic soda under pressure, leaves behind an iron-rich residue known as red mud, and then precipitates aluminum hydroxide from the clear liquor. Calcining the hydroxide at about 1,000 °C gives alumina, a white powder that is roughly half aluminum by weight. About two tonnes of alumina come from four to five tonnes of bauxite, and each tonne of alumina leaves one to one and a half tonnes of red mud to store.

Smelting uses the Hall-Héroult process, developed independently in the United States and France in 1886. Alumina is dissolved in molten cryolite at about 960 °C in a steel pot lined with carbon, and a direct current is passed between carbon anodes and the cathode lining. Oxygen from the alumina reacts with the anode carbon to form carbon dioxide, and liquid aluminum collects at the bottom of the pot. A smelter runs hundreds of pots in series, called a potline, and cannot be interrupted without the electrolyte freezing. A tonne of metal needs about two tonnes of alumina, roughly 400 kg of carbon anodes and about 14 MWh of electricity.

Molten metal is siphoned from the pots and cast into ingots, extrusion billet or rolling slab, sometimes with alloying elements added. Rolling mills turn slab into sheet and foil for cans and vehicle bodies; extrusion presses push billet through dies for window frames and structural sections; foundries cast alloys into wheels and engine parts. Secondary smelters melt scrap in gas-fired furnaces to make the same products, and most beverage cans are made from recycled cans.

Aluminum is used where low weight, corrosion resistance and conductivity matter. The International Aluminium Institute (IAI) reports that transport is the largest end use at roughly a quarter of global consumption, followed by building and construction, electrical engineering including transmission cables, packaging such as cans and foil, machinery, and consumer durables (IAI, global aluminium cycle). Foil and cans are thin and short-lived; buildings and power lines hold metal for decades, which is why the recycling rate for construction aluminum is high but the flow of scrap back to the market lags demand by a generation.

Nearly all aluminum is used as an alloy. Small additions of magnesium, silicon, copper or zinc give strength, castability or hardness, and the alloy series determine what a scrap stream can be recycled into. Alumina itself has a small market outside smelting, in ceramics, abrasives and refractories, and a share of bauxite goes into cement and chemicals.

The chain has one dominant node. China smelts more than half of the world's primary aluminum, refines most of its own alumina and imports the bauxite to do it, so a large share of world bauxite moves from Guinea and Australia to Chinese ports such as Longkou and Qingdao. Guinea's ore leaves through Kamsar and the river port at Boké, where several Chinese-backed consortia and the long-established Compagnie des Bauxites de Guinée load Capesize vessels. Australia exports bauxite from Weipa and Gove and alumina from refineries in Western Australia and Queensland through Bunbury, Kwinana and Gladstone. Brazil's chain runs from the Trombetas and Paragominas mines to the Alunorte refinery at Barcarena, the largest outside China.

Metal moves from smelters in the Gulf, Russia, Canada, India, Norway and Australia to fabricators in North America, Europe and East Asia, and the LME warehouse network in Rotterdam, Port Klang, Gwangyang and the US Gulf holds the stocks that back the futures contract. Because primary metal from China mostly stays at home, the western market depends on a shorter list of suppliers, and the loss of any one of them, as when Rusal was sanctioned in 2018 or when European smelters closed in 2022, shows up in premiums first and the LME price second.

Single points of failure are political and electrical. Guinea's bauxite exports, Indonesian and Guinean export policy, hydropower in Yunnan and Quebec, and gas prices in Europe and the Gulf each govern a large block of supply. The alumina stage is the most concentrated of all: a handful of refineries in Australia, Brazil and China supply most of the traded alumina, and an outage at one of them, such as the production cut at Alunorte in 2018, can lift alumina prices by half within weeks.