Century Aluminum CompanyCentury Aluminum will receive significant alumina supply from Brimstone, enabling its new plant and capacity expansion, reducing import reliance.

Brimstone and Century Aluminum have signed a memorandum of understanding to establish the first fully domestic mine-to-metal primary aluminum supply chain in the United States. Under the agreement, Brimstone will supply Century with significant volumes of alumina from its forthcoming plant, using a proprietary process that avoids bauxite by refining a common calcium-bearing silicate rock abundant in the US. Century recently announced a joint project to build the largest US primary aluminum plant ever in Inola, Oklahoma, which would double domestic capacity, and has restarted idle capacity at its Mt. Holly, South Carolina plant, increasing domestic capacity by 10 percent. Brimstone's commercial demonstration plant in Reno, Nevada is expected to be operational in 2028, with its first industrial-scale plant anticipated by 2034 and an annual production capacity of approximately 350,000 metric tons of smelter-grade alumina. The partnership aims to reduce reliance on imports, as China currently accounts for about 60 percent of global alumina and aluminum production, while the US produces less than one-sixth of the aluminum it consumes.
Century Aluminum CompanyCentury Aluminum will receive significant alumina supply from Brimstone, enabling its new plant and capacity expansion, reducing import reliance.
Brimstone secures a customer for its alumina output from its forthcoming plant, validating its proprietary refining process.