Metal recovery and conversion of steel slag into highly reactive cement components


For a long time a sustainable and careful use of our planet’s resources have been the motivation for industry and research institutions to improve the manufacturing processes of products continuously. One of these activities is to find a valorization for the iron and steelmaking slag in order to preserve natural resources.

1 Introduction

Blastfurnace slag is the result of pig iron production and is mainly turned into granulated slag. Finely ground it shows latent hydraulic properties and is already used as a cement component for many applications. However, contrary to this, the lesser reactive steel slags (LD and electric arc furnace slag) generated during the steelmaking process, have not been introduced as a composite material in cement until now.

Germany produces approx. 6 million tonnes of steel slag (3.5 million tonnes of LD slag and 1.8 million tonnes of electric arc furnace slag) [1]. Depending on its lime...

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