Ferriere Nord as an example of sustainability in Federacciai’s Report

The Zero Waste Project of Ferriere Nord emerges among virtuous examples of Circular Economy applied to steel production in Federacciai’s sustainability 2017 report.
The project, started in the mid-90s, has allowed to review the processing and destination of secondary materials within a circular economy frame, thus reducing the amount of material to be disposed in landfills and, as a result, saving on the extraction of new raw materials.

In particular, we have dealt with EAF and LF slag, fumes abatement’s dust, flake and refractories. The aforementioned secondary materials once considered as scrap, now are reviewed and revalued within a circular economy frame. They are used in replacement of other raw materials which otherwise would have been extracted from mines or quarries: basalt, porphyry, limestone, iron and zinc minerals and lead.

EAF SLAG

EAF slag represents the 15% of steel produced by Ferriere Nord S.p.A., an important quantity of material, which is transformed in aggregates for pavements named Granella® (steel slag). Its production started in 1998 with a prototype plant and later, in 2004, the definitive plant was built. The latter is able to treat all the EAF slag produced. In 2005, the material was certified and it is sold with the EC mark in accordance with the Construction Products Regulation. The entire production of EAF slag is intended to be used in draining pavements as substitute for raw basalt or porphyry.

FUMES ABATEMENT’S DUST

‘’Fumes abatement’s dust’’ are minerals rich in Zinc (20% – 30%) and Lead (5%), much richer than natural minerals. This product, conferred to Zinc producers, allows to save raw material usage.

LF SLAG AND REFRACTORIES

LF Slag and refractories are reused in EAF as a partial substitute for Lime since 2001 when the definitive plant was built. This plant allows to reuse all the LF slag and all the refractories directly in the EAF furnace. This method saves the equivalent of the lime obtained.

FLAKE

Adequate analysis on this material proved that it is rich in Iron >98% in the form of oxide: a greater quantity compared to any other natural mineral. This product was standardized to enhance its value, by improving the separation processes from the cooling fluids. Today this material is sold to several clients: from the chemical industry to cement factories within a circular economy frame.