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Final report on Contract No 7210-PA/005; 1 July 1997 to 31 December 2000

The objectives of this project were to develop technologies to manufacture self-reducing briquettes out of waste iron oxides and to recycle them in an electric arc furnace or a cupola furnace.

CRM has investigated and determined the optimal characteristics (binder, size, grain size, compositions and activator for the reduction reaction) for briquettes containing mixtures of mill scales, mill sludges, electric arc furnace (EAF) dust and coal as reduction agent. The goal of obtaining briquettes, in which iron oxides are totally reduced when these briquettes are loaded with the scrap into an electric arc furnace, was achieved.

Trials at ProfilARBED have shown that it is possible to recycle mill and EAF by-products conditioned in self-reducing briquettes in an electric arc furnace without influence on the performance and on the environment. The iron content of the slag does not increase as the iron of the by-product is almost completely reduced. Zinc is completely removed and the concentration in the EAF dust increases.

BFI has investigated the best recycling method for sludge and dust of the blast furnace and basic oxygen furnace, by laboratory testing and industrial trials in a cupola furnace. Self-reducing briquettes have been produced and reduced. The best conditions for achieving the required briquetting have been determined.

Additional information

Authors: DERUNGS P, ProfilARBED, Esch-sur Alzette (LU);BROUHON J M, CRM, Liège (BE);HARP G, BFI, Düsseldorf (DE)
Bibliographic Reference: EUR 20108 EN (2002), pp.123. Euro: 19.00
Availability: EUR-OP reference: KI-NA-20108-EN-S. Available from EUR-OP sales agents. URL:
ISBN: ISBN: 92-894-3159-8
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