SUCCESSFUL TRIALS ON MASSES WITH MAGNESIA BASE REFRACTORY WASTE

PARTNER COMPANY

Pilar Pérez de Asis

Head of the Environment and Sustainable Development department

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A further step in Magna’s work towards sustainable development.

In 2020, Magnesitas Navarras (MAGNA) celebrates 75 years producing magnesia and manufacturing unshaped refractories for the steel sector – a long and wide experience, which results from the contribution of the people who took part in it.

Magna has a vertical process integration, which goes from magnesite extraction up to equipment design for the application of its refractories in steelmaking. The company has thus the necessary flexibility to adapt to customers and to new, increasingly sustainable production paradigms.

Circular economy and the use of secondary raw materials belong to the priorities of the resources intended for R+D+I. The LIFE5Refract project has enabled the development of knowledge regarding materials that have been sent to landfill until now, as well as the development of ways of exploitation in refractory applications.

The collaborative work carried out during the project has led to the identification of all types of magnesia base refractory waste. After the waste characterisation phase, masses were designed for various applications which had been previously tested in laboratories. Eventually, 9 various products were selected for coordinated testing at Sidenor Basauri, of which 5 were fully satisfactory, both in terms of application and performance. The applications of the validated products were in furnace guniting, ladle guniting and slab.

The percentages of secondary raw materials in the tested products went from 30% to 70% of the entire sinter used. This corresponds to a major premise for the use of steel mill magnesia base refractory waste.

Magna is very proud to take part in this project, which contributes to improve resource use and marks an important step in sustainable steel production.

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