GravitHy-Fos: a pioneering plant on a European scale

The industrial site of Fos-sur-Mer, France, will host our first Hot Briquetted Iron production plant, based on low carbon hydrogen, which will also be produced on site by GravitHy. This project is part of a green reindustrialisation dynamic, supported by European and national policies for energy transition.

With a investment of +2.5 billion€, we aim to become a key player in the decarbonisation of the steel industry in Europe.

Key figures

+2.5B€

Investment

2Mt

Of low-carbon iron produced per year

~750MW

Electrolysis capacity

~4Mt

Of CO₂ avoided a year

500

Direct jobs

3000

Indirect jobs

PlantEN
Import of iron ore. The ore is transported by sea to the mineral terminal of Fos-sur-Mer, then transported to the industrial site of GravitHy using a capped conveyor.
Storage area for iron ore pellets awaiting direct reduction, and HBI (Hot Briquetted Iron) storage awaiting export.
Direct reduction of ore. Iron ore and hydrogen are injected into the DRI tower (or reactor) for direct reduction of iron ore.
Water treatment and cooling unit.
Electrical substation and transformers supplying low-carbon electricity to the GravitHy industrial site.
Low-carbon hydrogen production. Up to 120,000 tons of hydrogen per year will be produced, via the electrolysis of water, powered by renewable and low-carbon electricity. The installed capacity of electrolysers will reach up to 750 MW.

3D of the GravitHy factory in Fos-sur-Mer, by the consortium Enia Architectes, Rougerie+Tangram.

A strategic location in the heart of southern France

Our future industrial site contributes to the revitalisation of the territory, the creation of skilled jobs and the ecological transition of heavy industry. Fos-sur-Mer was chosen for its many assets.

public consultation (french site only)

A multimodal hub at the heart of global flows

The maritime port of Marseille-Fos, located in a strategic maritime, fluvial and railway hub and having the necessary draught facilitating the import/export of raw materials and products.

A low-carbon, competitive and abundant electricity

Access to competitive green and low-carbon electricity in sufficient quantity.

An industrial ecosystem

A dynamic industrial ecosystem, with regional know-how and open to synergies and innovation.

Main milestones

June 2022
Creation of GravitHy
September 2022
Launch of the first industrial feasibility studies (FEL-1)
March 2023
Filing of the first administrative, environmental and electrical connection applications
May 2023
Signing of a memorandum of understanding with Vale for the search for solutions targeting the production of low-carbon steel with the use of iron ore briquettes
June 2023
Obtaining of first institutional supports and industrial partnerships
December 2023
Finalisation of basic engineering studies
March 2024
Launch of public consultations and local consultations
April 2024
Signing of a letter of intent with EDF to secure part of the electricity supply for the future GravitHy-Fos plant
May 2024
Partnership with Siemens France to optimize the design and operations of GravitHy-Fos
June 2024
Selection of the Spanish company IDOM to support engineering in the implementation of GravitHy-Fos
November 2024
Signing of an agreement with Rio Tinto for the supply to GravitHy of iron ore pellets, as well as the marketing and sale of the low-carbon hot-briquetted iron to be produced by GravtiHy
April 2024
Laureate of the France 2030 – Première Usine program which aims to support innovative start-ups and SMEs in building their first industrial production unit in France
June 2024
Start of Conceptual Engineering (FEL-2)
July 2024
GravitHy is officially designated by the French government as a project of major national interest
March 2025
Announcement of
a €60 million Series A fundraising
October 2025
Start of the detailed preliminary project engineering (or basic engineering). (FEL 3)
Q1 2026
Permits application
Autumn 2026
Permits obtention
& pre-construction activities
Q4 2026
Financial commitment
2027 – 2029
Construction phase
June 2029
Start of commissionning
2030
First production

Latest news

GravitHy and HES FOS sign strategic partnership to develop critical infrastructure in Fos-sur-Mer

We are pleased to announce the signing of a Memorandum of Understanding (MoU) with HES FOS, a subsidiary of HES International, to establish a long-term strategic partnership for the development …

  • Press Release

GravitHy raises €60 Million to accelerate steel industry decarbonization

We are proud to announce the successful completion of our €60 million fundraising round, which includes support from the “Première Usine” program under France 2030. This milestone strengthens our ability …

  • Press Release

GravitHy partners with Rio Tinto to accelerate steel decarbonization in Europe

We are proud to announce a strategic agreement with Rio Tinto, a global leader in mining and materials, to support our project for low-carbon iron production in Fos-sur-Mer. This collaboration …

  • Press Release