ABSTRACT
Electric arc furnace dust (EAFD) from steel recycling is often highly loaded with zinc. Steel producers operating an electric arc furnace are using up to 100% scrap as raw material. Zinc is mainly used for corrosion protection of steel products, therefore EAFD from steel recycling shows high amounts of zinc. Melting one ton of scrap roughly produces 20 kg of zinc containing dust. Therefore, EAFD nowadays represents a well-known secondary resource in zinc metallurgy and the operating steel mills are keeping an eye on technologies to treat their own dust in the most effective way. This paper shows an innovative way to establish a regional recycling solution allowing “zero waste” multi metal recycling. The two-step-dust recycling-process (“2sDR”) consists of a clinkering step and a subsequent carbo-thermal reduction to extract zinc oxide and an iron alloy. Furthermore, the clean slag should be used as construction material.
