Aluminium

What it is

Aluminium is the most abundant metallic element in Earth's crust but never occurs in pure metal form. Production runs through two industrial steps: the Bayer process refines bauxite ore into aluminium oxide (alumina), and the Hall-Héroult electrolytic process reduces alumina to metal. Four to five tonnes of bauxite yield roughly two tonnes of alumina, which yield one tonne of primary aluminium. That conversion ratio, combined with electrolytic smelting that consumes approximately 13-15 megawatt-hours per tonne, makes aluminium one of the world's most electricity-intensive industries, accounting for roughly 3% of global electricity consumption according to the IEA.

Key players divide into three tiers: bauxite miners (Guinea, Australia, Brazil, and India hold the largest reserves), alumina refiners, and primary smelters, with China accounting for roughly 57% of global primary output. The London Metal Exchange is the global benchmark; three-month LME aluminium averaged US$2,680 per tonne in H1 2026.

History

Commercial aluminium production became possible in 1886, when American Charles Hall and Frenchman Paul Héroult independently patented the electrolytic reduction process. Before that year, the metal was rarer than gold. Demand accelerated through both World Wars, when light-alloy airframes required large aluminium volumes. Post-1945, the metal scaled into packaging, construction, and power-transmission wiring, displacing heavier materials.

China entered large-scale smelting in the 1990s and grew to dominate global output within two decades. In 2017, Beijing imposed a self-capped annual smelting ceiling of 45 million tonnes to curb overcapacity and coal-power emissions. Guinea, in West Africa, emerged over the 2010s as the world's leading bauxite exporter as Australian reserves matured. Russia's UC Rusal was the largest primary producer outside China through the early 2020s, selling heavily into European markets before sanctions and quota restrictions reshaped those flows after 2022.

Current state

Three developments define the market as of mid-2026. China's operating smelting capacity reached approximately 43.8 million tonnes per year at end-2025, on track to hit the 45Mt cap by late 2026; the market and policy context is covered in الصين تقترب من سقف صهر الألمنيوم البالغ 45 مليون طن مع خفض حصة روسال في الاتحاد الأوروبي إلى 50,000 طن؛ متوسط سعر الألمنيوم في بورصة لندن للمعادن 2,680 دولاراً للطن في النصف الأول من 2026. The European Union simultaneously cut UC Rusal's preferential import quota from 275,000 tonnes to 50,000 tonnes for February-December 2026, lifting European duty-paid premiums US$60-80 per tonne.

Guinea, which supplies 75% of China's bauxite imports, imposed a 150 million tonne annual export ceiling effective June 1, 2026, cutting roughly 25% from the 2025 run-rate; details are in Guinea capped bauxite exports at 150 million tonnes per year, cutting ~25% from 2025 run-rate, as Chalco opened a $1B alumina refinery at Boffa. A separate dispute resolved in May 2026, when Emirates Global Aluminium settled with Conakry, restoring bauxite supply to the Al Taweelah alumina refinery in Abu Dhabi, as covered in غينيا وشركة الإمارات العالمية للألمنيوم تسويان نزاع البوكسيت وتستعيدان الإمداد لمصفاة أبوظبي.

Relationships

Guinea's bauxite dominance gives Conakry unusual leverage over Chinese smelters, whose strategic feedstock reserves are estimated at 30-45 days. China's Chalco, a subsidiary of state-owned Chinalco, opened a US$1 billion alumina refinery at Boffa, Guinea, in June 2026, converting ore to alumina in-country to partly sidestep ore-export restrictions. Russia's Rusal remains a significant global supplier despite EU restrictions, routing metal through non-sanctioned channels and LME-registered warehouses. The Gulf's Emirates Global Aluminium, a joint venture of Dubai's Dubal Holding and Abu Dhabi's ADQ, has grown into a top-five global primary smelter by leveraging low-cost gas-fired power.

What to watch

Four threads will shape aluminium over the next 12-24 months. Whether China revises the 45Mt cap upward, under lobbying pressure from Yunnan and Inner Mongolia smelters. Whether Guinea enforces its 150Mt export ceiling and how it is prorated across concession holders. Whether energy-transition demand, particularly for electric-vehicle housings, heat pumps, and solar-frame extrusions, accelerates consumption in line with IEA forecasts through 2030. And the Axis International US$28.9 billion ICSID arbitration against Guinea over revoked bauxite permits, which will test international investment-treaty protections for mineral deals in West Africa.