Chalco’s $1B Guinea Alumina Expansion

Aluminum Corporation of China Limited, better known as Chalco, is pushing deeper into Africa’s mining sector with plans to invest $1 billion in an alumina refinery in Guinea, strengthening China’s long-term control of the global aluminum supply chain.

The Chinese metals giant said it will establish a new entity to develop a 1.2 million-ton-per-year alumina plant in the West African nation, one of the world’s richest sources of bauxite, the key raw material used in aluminum production.

Under the agreement, the Guinean government will receive a 5% stake at nominal cost, with the option to increase its holding to as much as 35% at market value. The project remains subject to regulatory approvals from both shareholders and Guinean authorities.

Guinea emerges as strategic mining hub

The investment highlights Guinea’s growing importance in the global race for critical industrial minerals as Chinese producers seek overseas expansion opportunities amid tightening environmental restrictions at home.

China produces more than half of the world’s aluminum, but domestic smelting capacity has approached regulatory limits imposed by Beijing to curb carbon emissions. That has accelerated Chinese interest in resource-rich African nations, particularly Guinea, which holds some of the world’s largest untapped bauxite reserves.

Chalco joins other major Chinese firms expanding aggressively across Guinea’s mining industry, including rival China Hongqiao Group.

Chalco expands beyond bauxite mining

The project marks a strategic shift for Chalco, which has spent years developing the Boffa bauxite mine in Guinea. The proposed facility would become the company’s first alumina refinery outside China, allowing it to move further up the value chain closer to raw material sources.

Founded in 2001, Chalco is the flagship listed subsidiary of Aluminum Corporation of China and operates across the full aluminum production chain, including bauxite mining, alumina refining, electrolytic aluminum, logistics, energy and international trade.

The company is listed on the Shanghai, Hong Kong and New York stock exchanges and remains one of the world’s largest suppliers of alumina and high-purity aluminum products.

Africa’s commodity power grows

The Guinea investment reflects a broader shift in global commodity markets, where African nations are becoming increasingly central to supply chains tied to infrastructure, electric vehicles and energy transition industries.

For Guinea, the project could strengthen industrial development ambitions while reinforcing its position as a critical supplier to the global metals market.