ROMI: Role of Magnesium in iron oxide pelletizing

Purpose and goal

Ore-based iron sources are expected to continue to play an important role in the transition to a more sustainable society, as the need for iron and steel is expected to increase. In the following feasibility study, the possibility of using an iron oxide with natural magnesium in pelletization will be investigated. Such an iron ore pellet could be produced fossil-free and used in future fossil-free steel production. The aim of the feasibility study is to understand the connection between the presence of magnesium in an iron ore and its impact on product quality.

Expected results and effects

The project is expected to result in Knowledge in what mineral form and to what extent Mg is present in different iron ores. Indications on difference in behavior of the iron ore during induration depending on the occurrence of Mg. Geometallurgical roadmap for future studies. The preliminary study provides a first indication of how magnesium-rich iron ores could be used in fossil-free pelletizing. The results have great potential for the use of magnesium-rich iron oxides in Sweden and can thus have a direct positive impact in making use of existing complex iron ores.

Planned approach and implementation

The project consists of both small-scale experiments and a theoretical review and is carried out in collaboration between Luleå University of Technology and Kaunis Iron AB and consists of 5 work packages WP1: Project coordination WP2: Mineralogical characterization with focus on Mg WP3: Theoretical study of the Fe-Mg-O phase system. WP4: Pelletizing WP5. Geometallurgical roadmap.