The world’s leading producer of high-grade manganese ore

Eramet Comilog—Compagnie minière de l’Ogooué—operates the world’s largest manganese mine. Alongside the Bangombé deposit, Eramet Comilog began mining the Okouma deposit in 2023, which will eventually increase the company’s production capacity to 10 million tonnes per year.

Eramet Comilog makes a significant contribution to the country’s economic development by supporting numerous projects through partnerships or CSR programs.

Setrag’s Transgabonais railroad carries passengers and goods. With 24 stations, the line supports the country’s economic development by transporting 6 million tonnes of ore and goods each year, and helps to bring the country’s communities closer together. Every year, Setrag undertakes extensive works to upgrade and modernize the 648 kilometers of track.

The Comilog Dunkerque plant produces silicomanganese, an alloy of manganese and silicon, used to enhance steel and improve its strength and durability.

This eraLow-labeled alloy boasts a low carbon footprint, emitting just 1.9 tonnes of CO₂eq per tonne of alloy, making it an ideal choice for supporting the decarbonization of the steel industry.

Located, in the heart of one of France’s largest industrial hubs, the Comilog Dunkerque plant benefits from a strategic location for the distribution of silicomanganese across Europe.

Fully rebuilt in 2025, the plant’s furnace now has the largest silicomanganese production capacity in the Group, with an annual volume of 78 kt.

Comilog Dunkerque is actively committed to improving the environmental practices of its facilities. The new equipment has been specifically designed to allow traditional reducers to be supplemented with biocarbon, thereby reducing the furnace’s CO₂ emissions.

• More about Comilog Dunkerque

Eramet Marietta is the largest producer of manganese alloys in North America and the only producer of ferromanganese in the United States. The plant is strategically located along the Ohio River, conveniently positioned to receive raw materials from Gabon, and to supply its steelmaking customers located nearby.

Eramet Marietta has developed a flexible production system that enables it to meet its customers’ needs in real time with a full range of products (refined silicomanganese and ferromanganese), while recovering the maximum amount of manganese from raw materials. The plant has also expanded its markets, and is now able to sell 100% of its by-products thanks to the fact that they can be recycled.

With an extensive $40-million investment program designed to improve air quality and energy efficiency, and an ambitious roadmap to reduce CO₂emissions, Eramet Marietta is actively committed to reducing its environmental footprint. In 2023, Eramet Marietta will completely overhaul one of its furnaces in order to make it more powerful, more productive and less energy-intensive.

As a civic-minded industrial company, Eramet has set up initiatives to support education and health, through scholarships to Washington State Community College and support for the Marietta Memorial Health Foundation.

Eramet Marietta is ISO 9001, ISO 14001, and ISO 50001 certified.

A world leader in refined manganese alloys, Eramet Norway manufactures products for use in the production of steel. Located in the fjords of southern Norway, Eramet Norway’s three plants run exclusively on renewable energy and are mainly supplied with manganese ore from Eramet Comilog’s mines.

Eramet Norway Kvinesdal has three silicomanganese furnaces and a thermal power plant that produces about 80 GWh of electrical energy and large quantities of thermal energy for a nearby fish farm.

Eramet Norway Porsgrunn, with its two furnaces (silicomanganese and ferromanganese), specializes in refined ferromanganese, as does Eramet Norway Sauda, Europe’s largest manganese foundry, which has two large ferromanganese furnaces, making it the mainstay of the Group’s Manganese Alloys business.

Based on a successful pilot project, there are plans to build a large-scale energy recovery plant, partly financed by the Norwegian government, at the Sauda plant. The plant will also provide heating for the town of Sauda. Eramet Norway has set the goal of being the first producer in its sector to reach the target of zero net emissions.

As a civic-minded industrial company, Eramet Norway makes €250 million of purchases in Norway every year.

Eramet Norway actively contributes to the development of the country’s education system and the improvement of regional infrastructure.

Eramet Norway’s plants are ISO 9001, ISO 14001, and ISO 50001 certified.